1Changes in version 0.4.6.8 - 2021-10-26 2 This version fixes several bugs from earlier versions of Tor. One 3 highlight is a fix on how we track DNS timeouts to report general 4 relay overload. 5 6 o Major bugfixes (relay, overload state): 7 - Relays report the general overload state for DNS timeout errors 8 only if X% of all DNS queries over Y seconds are errors. Before 9 that, it only took 1 timeout to report the overload state which 10 was just too low of a threshold. The X and Y values are 1% and 10 11 minutes respectively but they are also controlled by consensus 12 parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha. 13 14 o Minor features (fallbackdir): 15 - Regenerate fallback directories for October 2021. Closes 16 ticket 40493. 17 18 o Minor features (testing): 19 - On a testing network, relays can now use the 20 TestingMinTimeToReportBandwidth option to change the smallest 21 amount of time over which they're willing to report their observed 22 maximum bandwidth. Previously, this was fixed at 1 day. For 23 safety, values under 2 hours are only supported on testing 24 networks. Part of a fix for ticket 40337. 25 - Relays on testing networks no longer rate-limit how frequently 26 they are willing to report new bandwidth measurements. Part of a 27 fix for ticket 40337. 28 - Relays on testing networks now report their observed bandwidths 29 immediately from startup. Previously, they waited until they had 30 been running for a full day. Closes ticket 40337. 31 32 o Minor bugfix (onion service): 33 - Do not flag an HSDir as non-running in case the descriptor upload 34 or fetch fails. An onion service closes pending directory 35 connections before uploading a new descriptor which can thus lead 36 to wrongly flagging many relays and thus affecting circuit building 37 path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha. 38 - Improve logging when a bad HS version is given. Fixes bug 40476; 39 bugfix on 0.4.6.1-alpha. 40 41 o Minor bugfix (CI, onion service): 42 - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500; 43 bugfix on 0.3.2.1-alpha. 44 45 o Minor bugfixes (compatibility): 46 - Fix compatibility with the most recent Libevent versions, which no 47 longer have an evdns_set_random_bytes() function. Because this 48 function has been a no-op since Libevent 2.0.4-alpha, it is safe 49 for us to just stop calling it. Fixes bug 40371; bugfix 50 on 0.2.1.7-alpha. 51 52 o Minor bugfixes (onion service, TROVE-2021-008): 53 - Only log v2 access attempts once total, in order to not pollute 54 the logs with warnings and to avoid recording the times on disk 55 when v2 access was attempted. Note that the onion address was 56 _never_ logged. This counts as a Low-severity security issue. 57 Fixes bug 40474; bugfix on 0.4.5.8. 58 59 60Changes in version 0.4.6.7 - 2021-08-16 61 This version fixes several bugs from earlier versions of Tor, 62 including one that could lead to a denial-of-service attack. Everyone 63 running an earlier version, whether as a client, a relay, or an onion 64 service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7. 65 66 o Major bugfixes (cryptography, security): 67 - Resolve an assertion failure caused by a behavior mismatch between 68 our batch-signature verification code and our single-signature 69 verification code. This assertion failure could be triggered 70 remotely, leading to a denial of service attack. We fix this issue 71 by disabling batch verification. Fixes bug 40078; bugfix on 72 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and 73 CVE-2021-38385. Found by Henry de Valence. 74 75 o Minor feature (fallbackdir): 76 - Regenerate fallback directories list. Close ticket 40447. 77 78 o Minor features (geoip data): 79 - Update the geoip files to match the IPFire Location Database, as 80 retrieved on 2021/08/12. 81 82 o Minor bugfix (crypto): 83 - Disable the unused batch verification feature of ed25519-donna. 84 Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry 85 de Valence. 86 87 o Minor bugfixes (onion service): 88 - Send back the extended SOCKS error 0xF6 (Onion Service Invalid 89 Address) for a v2 onion address. Fixes bug 40421; bugfix 90 on 0.4.6.2-alpha. 91 92 o Minor bugfixes (relay): 93 - Reduce the compression level for data streaming from HIGH to LOW 94 in order to reduce CPU load on the directory relays. Fixes bug 95 40301; bugfix on 0.3.5.1-alpha. 96 97 o Minor bugfixes (timekeeping): 98 - Calculate the time of day correctly on systems where the time_t 99 type includes leap seconds. (This is not the case on most 100 operating systems, but on those where it occurs, our tor_timegm 101 function did not correctly invert the system's gmtime function, 102 which could result in assertion failures when calculating voting 103 schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha. 104 105 106Changes in version 0.4.6.6 - 2021-06-30 107 Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that 108 allows Tor to build correctly on older versions of GCC. You should 109 upgrade to this version if you were having trouble building Tor 110 0.4.6.5; otherwise, there is probably no need. 111 112 o Minor bugfixes (compilation): 113 - Fix a compilation error when trying to build Tor with a compiler 114 that does not support const variables in static initializers. 115 Fixes bug 40410; bugfix on 0.4.6.5. 116 - Suppress a strict-prototype warning when building with some 117 versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha. 118 119 o Minor bugfixes (testing): 120 - Enable the deterministic RNG for unit tests that covers the 121 address set bloomfilter-based API's. Fixes bug 40419; bugfix 122 on 0.3.3.2-alpha. 123 124 125Changes in version 0.4.6.5 - 2021-06-14 126 Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x 127 series includes numerous features and bugfixes, including a significant 128 improvement to our circuit timeout algorithm that should improve 129 observed client performance, and a way for relays to report when they are 130 overloaded. 131 132 This release also includes security fixes for several security issues, 133 including a denial-of-service attack against onion service clients, 134 and another denial-of-service attack against relays. Everybody should 135 upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5. 136 137 Below are the changes since 0.4.6.4-rc. For a complete list of changes 138 since 0.4.5.8, see the ReleaseNotes file. 139 140 o Major bugfixes (security): 141 - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on 142 half-closed streams. Previously, clients failed to validate which 143 hop sent these cells: this would allow a relay on a circuit to end 144 a stream that wasn't actually built with it. Fixes bug 40389; 145 bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021- 146 003 and CVE-2021-34548. 147 148 o Major bugfixes (security, defense-in-depth): 149 - Detect more failure conditions from the OpenSSL RNG code. 150 Previously, we would detect errors from a missing RNG 151 implementation, but not failures from the RNG code itself. 152 Fortunately, it appears those failures do not happen in practice 153 when Tor is using OpenSSL's default RNG implementation. Fixes bug 154 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as 155 TROVE-2021-004. Reported by Jann Horn at Google's Project Zero. 156 157 o Major bugfixes (security, denial of service): 158 - Resist a hashtable-based CPU denial-of-service attack against 159 relays. Previously we used a naive unkeyed hash function to look 160 up circuits in a circuitmux object. An attacker could exploit this 161 to construct circuits with chosen circuit IDs, to create 162 collisions and make the hash table inefficient. Now we use a 163 SipHash construction here instead. Fixes bug 40391; bugfix on 164 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and 165 CVE-2021-34549. Reported by Jann Horn from Google's Project Zero. 166 - Fix an out-of-bounds memory access in v3 onion service descriptor 167 parsing. An attacker could exploit this bug by crafting an onion 168 service descriptor that would crash any client that tried to visit 169 it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also 170 tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei 171 Glazunov from Google's Project Zero. 172 173 o Minor features (geoip data): 174 - Update the geoip files to match the IPFire Location Database, as 175 retrieved on 2021/06/10. 176 177 o Minor features (logging, diagnostic): 178 - Log decompression failures at a higher severity level, since they 179 can help provide missing context for other warning messages. We 180 rate-limit these messages, to avoid flooding the logs if they 181 begin to occur frequently. Closes ticket 40175. 182 183 184Changes in version 0.4.6.4-rc - 2021-05-28 185 Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope, 186 the final release candidate in its series: unless major new issues are 187 found, the next release will be stable. 188 189 o Minor features (compatibility): 190 - Remove an assertion function related to TLS renegotiation. It was 191 used nowhere outside the unit tests, and it was breaking 192 compilation with recent alpha releases of OpenSSL 3.0.0. Closes 193 ticket 40399. 194 195 o Minor bugfixes (consensus handling): 196 - Avoid a set of bugs that could be caused by inconsistently 197 preferring an out-of-date consensus stored in a stale directory 198 cache over a more recent one stored on disk as the latest 199 consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha. 200 201 o Minor bugfixes (control, sandbox): 202 - Allow the control command SAVECONF to succeed when the seccomp 203 sandbox is enabled, and make SAVECONF keep only one backup file to 204 simplify implementation. Previously SAVECONF allowed a large 205 number of backup files, which made it incompatible with the 206 sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by 207 Daniel Pinto. 208 209 o Minor bugfixes (metrics port): 210 - Fix a bug that made tor try to re-bind() on an already open 211 MetricsPort every 60 seconds. Fixes bug 40370; bugfix 212 on 0.4.5.1-alpha. 213 214 o Removed features: 215 - Remove unneeded code for parsing private keys in directory 216 documents. This code was only used for client authentication in v2 217 onion services, which are now unsupported. Closes ticket 40374. 218 219 220Changes in version 0.4.5.8 - 2021-05-10 221 Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes 222 from the 0.4.6.x series. 223 224 o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc): 225 - Add a workaround to enable the Linux sandbox to work correctly 226 with Glibc 2.33. This version of Glibc has started using the 227 fstatat() system call, which previously our sandbox did not allow. 228 Closes ticket 40382; see the ticket for a discussion of trade-offs. 229 230 o Minor features (compilation, backport from 0.4.6.3-rc): 231 - Make the autoconf script build correctly with autoconf versions 232 2.70 and later. Closes part of ticket 40335. 233 234 o Minor features (fallback directory list, backport from 0.4.6.2-alpha): 235 - Regenerate the list of fallback directories to contain a new set 236 of 200 relays. Closes ticket 40265. 237 238 o Minor features (geoip data): 239 - Update the geoip files to match the IPFire Location Database, as 240 retrieved on 2021/05/07. 241 242 o Minor features (onion services): 243 - Add warning message when connecting to now deprecated v2 onion 244 services. As announced, Tor 0.4.5.x is the last series that will 245 support v2 onions. Closes ticket 40373. 246 247 o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha): 248 - Fix a regression that made it impossible start Tor using a bridge 249 line with a transport name and no fingerprint. Fixes bug 40360; 250 bugfix on 0.4.5.4-rc. 251 252 o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc): 253 - Allow a custom "ar" for cross-compilation. Our previous build 254 script had used the $AR environment variable in most places, but 255 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha. 256 257 o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha): 258 - Fix a non-fatal BUG() message due to a too-early free of a string, 259 when listing a client connection from the DoS defenses subsystem. 260 Fixes bug 40345; bugfix on 0.4.3.4-rc. 261 262 o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc): 263 - Fix an indentation problem that led to a warning from GCC 11.1.1. 264 Fixes bug 40380; bugfix on 0.3.0.1-alpha. 265 266 o Minor bugfixes (controller, backport from 0.4.6.1-alpha): 267 - Fix a "BUG" warning that would appear when a controller chooses 268 the first hop for a circuit, and that circuit completes. Fixes bug 269 40285; bugfix on 0.3.2.1-alpha. 270 271 o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc): 272 - Fix a bug where an expired cached descriptor could get overwritten 273 with a new one without freeing it, leading to a memory leak. Fixes 274 bug 40356; bugfix on 0.3.5.1-alpha. 275 276 o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha): 277 - Fix pattern-matching errors when patterns expand to invalid paths 278 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by 279 Daniel Pinto. 280 281 282Changes in version 0.4.6.3-rc - 2021-05-10 283 Tor 0.4.6.3-rc is the first release candidate in its series. It fixes 284 a few small bugs from previous versions, and adds a better error 285 message when trying to use (no longer supported) v2 onion services. 286 287 Though we anticipate that we'll be doing a bit more clean-up between 288 now and the stable release, we expect that our remaining changes will 289 be fairly simple. There will likely be at least one more release 290 candidate before 0.4.6.x is stable. 291 292 o Major bugfixes (onion service, control port): 293 - Make the ADD_ONION command properly configure client authorization. 294 Before this fix, the created onion failed to add the client(s). 295 Fixes bug 40378; bugfix on 0.4.6.1-alpha. 296 297 o Minor features (compatibility, Linux seccomp sandbox): 298 - Add a workaround to enable the Linux sandbox to work correctly 299 with Glibc 2.33. This version of Glibc has started using the 300 fstatat() system call, which previously our sandbox did not allow. 301 Closes ticket 40382; see the ticket for a discussion of trade-offs. 302 303 o Minor features (compilation): 304 - Make the autoconf script build correctly with autoconf versions 305 2.70 and later. Closes part of ticket 40335. 306 307 o Minor features (geoip data): 308 - Update the geoip files to match the IPFire Location Database, as 309 retrieved on 2021/05/07. 310 311 o Minor features (onion services): 312 - Add a warning message when trying to connect to (no longer 313 supported) v2 onion services. Closes ticket 40373. 314 315 o Minor bugfixes (build, cross-compilation): 316 - Allow a custom "ar" for cross-compilation. Our previous build 317 script had used the $AR environment variable in most places, but 318 it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha. 319 320 o Minor bugfixes (compiler warnings): 321 - Fix an indentation problem that led to a warning from GCC 11.1.1. 322 Fixes bug 40380; bugfix on 0.3.0.1-alpha. 323 324 o Minor bugfixes (logging, relay): 325 - Emit a warning if an Address is found to be internal and tor can't 326 use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha. 327 328 o Minor bugfixes (onion service, client, memory leak): 329 - Fix a bug where an expired cached descriptor could get overwritten 330 with a new one without freeing it, leading to a memory leak. Fixes 331 bug 40356; bugfix on 0.3.5.1-alpha. 332 333 334Changes in version 0.4.6.2-alpha - 2021-04-15 335 Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several 336 small bugs in previous releases, and solves other issues that had 337 enabled denial-of-service attacks and affected integration with 338 other tools. 339 340 o Minor features (client): 341 - Clients now check whether their streams are attempting to re-enter 342 the Tor network (i.e. to send Tor traffic over Tor), and close 343 them preemptively if they think exit relays will refuse them for 344 this reason. See ticket 2667 for details. Closes ticket 40271. 345 346 o Minor features (command line): 347 - Add long format name "--torrc-file" equivalent to the existing 348 command-line option "-f". Closes ticket 40324. Patch by 349 Daniel Pinto. 350 351 o Minor features (dormant mode): 352 - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained 353 control over whether the client ever becomes dormant from 354 inactivity. Most people won't need this. Closes ticket 40228. 355 356 o Minor features (fallback directory list): 357 - Regenerate the list of fallback directories to contain a new set 358 of 200 relays. Closes ticket 40265. 359 360 o Minor features (geoip data): 361 - Update the geoip files to match the IPFire Location Database, as 362 retrieved on 2021/04/13. 363 364 o Minor features (logging): 365 - Edit heartbeat log messages so that more of them begin with the 366 string "Heartbeat: ". Closes ticket 40322; patch 367 from 'cypherpunks'. 368 369 o Minor bugfixes (bridge, pluggable transport): 370 - Fix a regression that made it impossible start Tor using a bridge 371 line with a transport name and no fingerprint. Fixes bug 40360; 372 bugfix on 0.4.5.4-rc. 373 374 o Minor bugfixes (channel, DoS): 375 - Fix a non-fatal BUG() message due to a too-early free of a string, 376 when listing a client connection from the DoS defenses subsystem. 377 Fixes bug 40345; bugfix on 0.4.3.4-rc. 378 379 o Minor bugfixes (compilation): 380 - Fix a compilation warning about unused functions when building 381 with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug 382 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto. 383 384 o Minor bugfixes (configuration): 385 - Fix pattern-matching for directories on all platforms when using 386 %include options in configuration files. This patch also fixes 387 compilation on musl libc based systems. Fixes bug 40141; bugfix 388 on 0.4.5.1-alpha. 389 390 o Minor bugfixes (relay): 391 - Move the "overload-general" line from extrainfo to the server 392 descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha. 393 394 o Minor bugfixes (testing, BSD): 395 - Fix pattern-matching errors when patterns expand to invalid paths 396 on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by 397 Daniel Pinto. 398 399 o Documentation (manual): 400 - Move the ServerTransport* options to the "SERVER OPTIONS" section. 401 Closes issue 40331. 402 - Indicate that the HiddenServiceStatistics option also applies to 403 bridges. Closes ticket 40346. 404 - Move the description of BridgeRecordUsageByCountry to the section 405 "STATISTICS OPTIONS". Closes ticket 40323. 406 407 408Changes in version 0.4.6.1-alpha - 2021-03-18 409 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It 410 improves client circuit performance, adds missing features, and 411 improves some of our DoS handling and statistics reporting. It also 412 includes numerous smaller bugfixes. 413 414 Below are the changes since 0.4.5.7. (Note that this release DOES 415 include the fixes for the security bugs already fixed in 0.4.5.7.) 416 417 o Major features (control port, onion services): 418 - Add controller support for creating version 3 onion services with 419 client authorization. Previously, only v2 onion services could be 420 created with client authorization. Closes ticket 40084. Patch by 421 Neel Chauhan. 422 423 o Major features (directory authority): 424 - When voting on a relay with a Sybil-like appearance, add the Sybil 425 flag when clearing out the other flags. This lets a relay operator 426 know why their relay hasn't been included in the consensus. Closes 427 ticket 40255. Patch by Neel Chauhan. 428 429 o Major features (metrics): 430 - Relays now report how overloaded they are in their extrainfo 431 documents. This information is controlled with the 432 OverloadStatistics torrc option, and it will be used to improve 433 decisions about the network's load balancing. Implements proposal 434 328; closes ticket 40222. 435 436 o Major features (relay, denial of service): 437 - Add a new DoS subsystem feature to control the rate of client 438 connections for relays. Closes ticket 40253. 439 440 o Major features (statistics): 441 - Relays now publish statistics about the number of v3 onion 442 services and volume of v3 onion service traffic, in the same 443 manner they already do for v2 onions. Closes ticket 23126. 444 445 o Major bugfixes (circuit build timeout): 446 - Improve the accuracy of our circuit build timeout calculation for 447 60%, 70%, and 80% build rates for various guard choices. We now 448 use a maximum likelihood estimator for Pareto parameters of the 449 circuit build time distribution, instead of a "right-censored 450 estimator". This causes clients to ignore circuits that never 451 finish building in their timeout calculations. Previously, clients 452 were counting such unfinished circuits as having the highest 453 possible build time value, when in reality these circuits most 454 likely just contain relays that are offline. We also now wait a 455 bit longer to let circuits complete for measurement purposes, 456 lower the minimum possible effective timeout from 1.5 seconds to 457 10ms, and increase the resolution of the circuit build time 458 histogram from 50ms bin widths to 10ms bin widths. Additionally, 459 we alter our estimate Xm by taking the maximum of the top 10 most 460 common build time values of the 10ms histogram, and compute Xm as 461 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha. 462 - Remove max_time calculation and associated warning from circuit 463 build timeout 'alpha' parameter estimation, as this is no longer 464 needed by our new estimator from 40168. Fixes bug 34088; bugfix 465 on 0.2.2.9-alpha. 466 467 o Major bugfixes (signing key): 468 - In the tor-gencert utility, give an informative error message if 469 the passphrase given in `--create-identity-key` is too short. 470 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan. 471 472 o Minor features (bridge): 473 - We now announce the URL to Tor's new bridge status at 474 https://bridges.torproject.org/ when Tor is configured to run as a 475 bridge relay. Closes ticket 30477. 476 477 o Minor features (build system): 478 - New "make lsp" command to auto generate the compile_commands.json 479 file used by the ccls server. The "bear" program is needed for 480 this. Closes ticket 40227. 481 482 o Minor features (command-line interface): 483 - Add build informations to `tor --version` in order to ease 484 reproducible builds. Closes ticket 32102. 485 - When parsing command-line flags that take an optional argument, 486 treat the argument as absent if it would start with a '-' 487 character. Arguments in that form are not intelligible for any of 488 our optional-argument flags. Closes ticket 40223. 489 - Allow a relay operator to list the ed25519 keys on the command 490 line by adding the `rsa` and `ed25519` arguments to the 491 --list-fingerprint flag to show the respective RSA and ed25519 492 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan. 493 494 o Minor features (control port, stream handling): 495 - Add the stream ID to the event line in the ADDRMAP control event. 496 Closes ticket 40249. Patch by Neel Chauhan. 497 498 o Minor features (dormant mode): 499 - Add a new 'DormantTimeoutEnabled' option for coarse-grained 500 control over whether the client can become dormant from 501 inactivity. Most people won't need this. Closes ticket 40228. 502 503 o Minor features (logging): 504 - Change the DoS subsystem heartbeat line format to be more clear on 505 what has been detected/rejected, and which option is disabled (if 506 any). Closes ticket 40308. 507 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c, 508 put brackets around IPv6 addresses in log messages. Closes ticket 509 40232. Patch by Neel Chauhan. 510 511 o Minor features (performance, windows): 512 - Use SRWLocks to implement locking on Windows. Replaces the 513 "critical section" locking implementation with the faster 514 SRWLocks, available since Windows Vista. Closes ticket 17927. 515 Patch by Daniel Pinto. 516 517 o Minor features (protocol, proxy support, defense in depth): 518 - Close HAProxy connections if they somehow manage to send us data 519 before we start reading. Closes another case of ticket 40017. 520 521 o Minor features (tests, portability): 522 - Port the hs_build_address.py test script to work with recent 523 versions of python. Closes ticket 40213. Patch from 524 Samanta Navarro. 525 526 o Minor features (vote document): 527 - Add a "stats" line to directory authority votes, to report various 528 statistics that authorities compute about the relays. This will 529 help us diagnose the network better. Closes ticket 40314. 530 531 o Minor bugfixes (build): 532 - The configure script now shows whether or not lzma and zstd have 533 been used, not just if the enable flag was passed in. Fixes bug 534 40236; bugfix on 0.4.3.1-alpha. 535 536 o Minor bugfixes (compatibility): 537 - Fix a failure in the test cases when running on the "hppa" 538 architecture, along with a related test that might fail on other 539 architectures in the future. Fixes bug 40274; bugfix 540 on 0.2.5.1-alpha. 541 542 o Minor bugfixes (controller): 543 - Fix a "BUG" warning that would appear when a controller chooses 544 the first hop for a circuit, and that circuit completes. Fixes bug 545 40285; bugfix on 0.3.2.1-alpha. 546 547 o Minor bugfixes (directory authorities, voting): 548 - Add a new consensus method (31) to support any future changes that 549 authorities decide to make to the value of bwweightscale or 550 maxunmeasuredbw. Previously, there was a bug that prevented the 551 authorities from parsing these consensus parameters correctly under 552 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha. 553 554 o Minor bugfixes (ipv6): 555 - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some 556 rare configurations might break, but in this case you can disable 557 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix 558 on 0.4.1.1-alpha. Patch by Neel Chauhan. 559 560 o Minor bugfixes (key generation): 561 - Do not require a valid torrc when using the `--keygen` argument to 562 generate a signing key. This allows us to generate keys on systems 563 or users which may not run Tor. Fixes bug 40235; bugfix on 564 0.2.7.2-alpha. Patch by Neel Chauhan. 565 566 o Minor bugfixes (onion services, logging): 567 - Downgrade the severity of a few rendezvous circuit-related 568 warnings from warning to info. Fixes bug 40207; bugfix on 569 0.3.2.1-alpha. Patch by Neel Chauhan. 570 571 o Minor bugfixes (relay): 572 - Reduce the compression level for data streaming from HIGH to LOW. 573 This should reduce the CPU and memory burden for directory caches. 574 Fixes bug 40301; bugfix on 0.3.5.1-alpha. 575 576 o Code simplification and refactoring: 577 - Remove the orconn_ext_or_id_map structure and related functions. 578 (Nothing outside of unit tests used them.) Closes ticket 33383. 579 Patch by Neel Chauhan. 580 581 o Removed features: 582 - As of this release, Tor no longer supports the old v2 onion 583 services. They were deprecated last July for security, and support 584 will be removed entirely later this year. We strongly encourage 585 everybody to migrate to v3 onion services. For more information, 586 see https://blog.torproject.org/v2-deprecation-timeline . Closes 587 ticket 40266. (NOTE: We accidentally released an earlier version 588 of the 0.4.6.1-alpha changelog without this entry. Sorry for 589 the confusion!) 590 591 o Code simplification and refactoring (metrics, DoS): 592 - Move the DoS subsystem into the subsys manager, including its 593 configuration options. Closes ticket 40261. 594 595 o Removed features (relay): 596 - Because DirPorts are only used on authorities, relays no longer 597 advertise them. Similarly, self-testing for DirPorts has been 598 disabled, since an unreachable DirPort is no reason for a relay 599 not to advertise itself. (Configuring a DirPort will still work, 600 for now.) Closes ticket 40282. 601 602 603Changes in version 0.3.5.14 - 2021-03-16 604 Tor 0.3.5.14 backports fixes for two important denial-of-service bugs 605 in earlier versions of Tor. 606 607 One of these vulnerabilities (TROVE-2021-001) would allow an attacker 608 who can send directory data to a Tor instance to force that Tor 609 instance to consume huge amounts of CPU. This is easiest to exploit 610 against authorities, since anybody can upload to them, but directory 611 caches could also exploit this vulnerability against relays or clients 612 when they download. The other vulnerability (TROVE-2021-002) only 613 affects directory authorities, and would allow an attacker to remotely 614 crash the authority with an assertion failure. Patches have already 615 been provided to the authority operators, to help ensure 616 network stability. 617 618 We recommend that everybody upgrade to one of the releases that fixes 619 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available 620 to you. 621 622 This release also updates our GeoIP data source, and fixes a 623 compatibility issue. 624 625 o Major bugfixes (security, denial of service, backport from 0.4.5.7): 626 - Disable the dump_desc() function that we used to dump unparseable 627 information to disk. It was called incorrectly in several places, 628 in a way that could lead to excessive CPU usage. Fixes bug 40286; 629 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021- 630 001 and CVE-2021-28089. 631 - Fix a bug in appending detached signatures to a pending consensus 632 document that could be used to crash a directory authority. Fixes 633 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002 634 and CVE-2021-28090. 635 636 o Minor features (geoip data, backport from 0.4.5.7): 637 - We have switched geoip data sources. Previously we shipped IP-to- 638 country mappings from Maxmind's GeoLite2, but in 2019 they changed 639 their licensing terms, so we were unable to update them after that 640 point. We now ship geoip files based on the IPFire Location 641 Database instead. (See https://location.ipfire.org/ for more 642 information). This release updates our geoip files to match the 643 IPFire Location Database as retrieved on 2021/03/12. Closes 644 ticket 40224. 645 646 o Removed features (mallinfo deprecated, backport from 0.4.5.7): 647 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it. 648 Closes ticket 40309. 649 650 651Changes in version 0.4.4.8 - 2021-03-16 652 Tor 0.4.4.8 backports fixes for two important denial-of-service bugs 653 in earlier versions of Tor. 654 655 One of these vulnerabilities (TROVE-2021-001) would allow an attacker 656 who can send directory data to a Tor instance to force that Tor 657 instance to consume huge amounts of CPU. This is easiest to exploit 658 against authorities, since anybody can upload to them, but directory 659 caches could also exploit this vulnerability against relays or clients 660 when they download. The other vulnerability (TROVE-2021-002) only 661 affects directory authorities, and would allow an attacker to remotely 662 crash the authority with an assertion failure. Patches have already 663 been provided to the authority operators, to help ensure 664 network stability. 665 666 We recommend that everybody upgrade to one of the releases that fixes 667 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available 668 to you. 669 670 This release also updates our GeoIP data source, and fixes a 671 compatibility issue. 672 673 o Major bugfixes (security, denial of service, backport from 0.4.5.7): 674 - Disable the dump_desc() function that we used to dump unparseable 675 information to disk. It was called incorrectly in several places, 676 in a way that could lead to excessive CPU usage. Fixes bug 40286; 677 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021- 678 001 and CVE-2021-28089. 679 - Fix a bug in appending detached signatures to a pending consensus 680 document that could be used to crash a directory authority. Fixes 681 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002 682 and CVE-2021-28090. 683 684 o Minor features (geoip data, backport from 0.4.5.7): 685 - We have switched geoip data sources. Previously we shipped IP-to- 686 country mappings from Maxmind's GeoLite2, but in 2019 they changed 687 their licensing terms, so we were unable to update them after that 688 point. We now ship geoip files based on the IPFire Location 689 Database instead. (See https://location.ipfire.org/ for more 690 information). This release updates our geoip files to match the 691 IPFire Location Database as retrieved on 2021/03/12. Closes 692 ticket 40224. 693 694 o Removed features (mallinfo deprecated, backport from 0.4.5.7): 695 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it. 696 Closes ticket 40309. 697 698 699Changes in version 0.4.5.7 - 2021-03-16 700 Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier 701 versions of Tor. 702 703 One of these vulnerabilities (TROVE-2021-001) would allow an attacker 704 who can send directory data to a Tor instance to force that Tor 705 instance to consume huge amounts of CPU. This is easiest to exploit 706 against authorities, since anybody can upload to them, but directory 707 caches could also exploit this vulnerability against relays or clients 708 when they download. The other vulnerability (TROVE-2021-002) only 709 affects directory authorities, and would allow an attacker to remotely 710 crash the authority with an assertion failure. Patches have already 711 been provided to the authority operators, to help ensure 712 network stability. 713 714 We recommend that everybody upgrade to one of the releases that fixes 715 these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available 716 to you. 717 718 This release also updates our GeoIP data source, and fixes a few 719 smaller bugs in earlier releases. 720 721 o Major bugfixes (security, denial of service): 722 - Disable the dump_desc() function that we used to dump unparseable 723 information to disk. It was called incorrectly in several places, 724 in a way that could lead to excessive CPU usage. Fixes bug 40286; 725 bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021- 726 001 and CVE-2021-28089. 727 - Fix a bug in appending detached signatures to a pending consensus 728 document that could be used to crash a directory authority. Fixes 729 bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002 730 and CVE-2021-28090. 731 732 o Minor features (geoip data): 733 - We have switched geoip data sources. Previously we shipped IP-to- 734 country mappings from Maxmind's GeoLite2, but in 2019 they changed 735 their licensing terms, so we were unable to update them after that 736 point. We now ship geoip files based on the IPFire Location 737 Database instead. (See https://location.ipfire.org/ for more 738 information). This release updates our geoip files to match the 739 IPFire Location Database as retrieved on 2021/03/12. Closes 740 ticket 40224. 741 742 o Minor bugfixes (directory authority): 743 - Now that exit relays don't allow exit connections to directory 744 authority DirPorts (to prevent network reentry), disable 745 authorities' reachability self test on the DirPort. Fixes bug 746 40287; bugfix on 0.4.5.5-rc. 747 748 o Minor bugfixes (documentation): 749 - Fix a formatting error in the documentation for 750 VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha. 751 752 o Minor bugfixes (Linux, relay): 753 - Fix a bug in determining total available system memory that would 754 have been triggered if the format of Linux's /proc/meminfo file 755 had ever changed to include "MemTotal:" in the middle of a line. 756 Fixes bug 40315; bugfix on 0.2.5.4-alpha. 757 758 o Minor bugfixes (metrics port): 759 - Fix a BUG() warning on the MetricsPort for an internal missing 760 handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha. 761 762 o Minor bugfixes (onion service): 763 - Remove a harmless BUG() warning when reloading tor configured with 764 onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha. 765 766 o Minor bugfixes (portability): 767 - Fix a non-portable usage of "==" with "test" in the configure 768 script. Fixes bug 40298; bugfix on 0.4.5.1-alpha. 769 770 o Minor bugfixes (relay): 771 - Remove a spammy log notice falsely claiming that the IPv4/v6 772 address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha. 773 - Do not query the address cache early in the boot process when 774 deciding if a relay needs to fetch early directory information 775 from an authority. This bug resulted in a relay falsely believing 776 it didn't have an address and thus triggering an authority fetch 777 at each boot. Related to our fix for 40300. 778 779 o Removed features (mallinfo deprecated): 780 - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it. 781 Closes ticket 40309. 782 783 784Changes in version 0.4.5.6 - 2021-02-15 785 The Tor 0.4.5.x release series is dedicated to the memory of Karsten 786 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father. 787 Karsten is best known for creating the Tor metrics portal and leading 788 the metrics team, but he was involved in Tor from the early days. For 789 example, while he was still a student he invented and implemented the 790 v2 onion service directory design, and he also served as an ambassador 791 to the many German researchers working in the anonymity field. We 792 loved him and respected him for his patience, his consistency, and his 793 welcoming approach to growing our community. 794 795 This release series introduces significant improvements in relay IPv6 796 address discovery, a new "MetricsPort" mechanism for relay operators 797 to measure performance, LTTng support, build system improvements to 798 help when using Tor as a static library, and significant bugfixes 799 related to Windows relay performance. It also includes numerous 800 smaller features and bugfixes. 801 802 Below are the changes since 0.4.4.4-rc. For a complete list of changes 803 since 0.4.4.7, see the ReleaseNotes file. 804 805 o Major bugfixes (IPv6, relay): 806 - Fix a bug that prevented a relay from publishing its descriptor if 807 an auto-discovered IPv6 that was found unreachable. Fixes bug 808 40279; bugfix on 0.4.5.1-alpha. 809 810 o Minor features (protocol versions): 811 - Stop claiming to support the "DirCache=1" subprotocol version. 812 Technically, we stopped supporting this subprotocol back in 813 0.4.5.1-alpha, but we needed to wait for the authorities to stop 814 listing it as "required" before we could drop it from the list. 815 Closes ticket 40221. 816 817 o Minor bugfixes (logging): 818 - Avoid a spurious log message about missing subprotocol versions, 819 when the consensus that we're reading from is older than the 820 current release. Previously we had made this message nonfatal, but 821 in practice, it is never relevant when the consensus is older than 822 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha. 823 824 o Minor bugfixes (metrics port): 825 - Fix a bug warning when a metrics port socket was unexpectedly 826 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha 827 828 o Minor bugfixes (relay): 829 - Allow relays to have a RFC1918 address if PublishServerDescriptor 830 is set to 0 and AssumeReachable is set to 1. This is to support 831 the use case of a bridge on a local network, exposed via a 832 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha. 833 834 o Minor bugfixes (relay, config): 835 - Fix a problem in the removal of duplicate ORPorts from the 836 internal port list when loading the config file. We were removing 837 the wrong ports, breaking valid torrc uses cases for multiple 838 ORPorts of the same address family. Fixes bug 40289; bugfix 839 on 0.4.5.1-alpha. 840 841 842Changes in version 0.4.4.7 - 2021-02-03 843 Tor 0.4.4.7 backports numerous bugfixes from later releases, 844 including one that made v3 onion services more susceptible to 845 denial-of-service attacks, and a feature that makes some kinds of 846 DoS attacks harder to perform. 847 848 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc): 849 - Stop requiring a live consensus for v3 clients and services, and 850 allow a "reasonably live" consensus instead. This allows v3 onion 851 services to work even if the authorities fail to generate a 852 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix 853 on 0.3.5.1-alpha. 854 855 o Major feature (exit, backport from 0.4.5.5-rc): 856 - Re-entry into the network is now denied at the Exit level to all 857 relays' ORPorts and authorities' ORPorts and DirPorts. This change 858 should help mitgate a set of denial-of-service attacks. Closes 859 ticket 2667. 860 861 o Minor feature (build system, backport from 0.4.5.4-rc): 862 - New "make lsp" command to generate the compile_commands.json file 863 used by the ccls language server. The "bear" program is needed for 864 this. Closes ticket 40227. 865 866 o Minor features (compilation, backport from 0.4.5.2-rc): 867 - Disable deprecation warnings when building with OpenSSL 3.0.0 or 868 later. There are a number of APIs newly deprecated in OpenSSL 869 3.0.0 that Tor still requires. (A later version of Tor will try to 870 stop depending on these APIs.) Closes ticket 40165. 871 872 o Minor features (crypto, backport from 0.4.5.3-rc): 873 - Fix undefined behavior on our Keccak library. The bug only 874 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel) 875 and would result in wrong digests. Fixes bug 40210; bugfix on 876 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and 877 weasel for diagnosing this. 878 879 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc): 880 - Strip '\r' characters when reading text files on Unix platforms. 881 This should resolve an issue where a relay operator migrates a 882 relay from Windows to Unix, but does not change the line ending of 883 Tor's various state files to match the platform, and the CRLF line 884 endings from Windows end up leaking into other files such as the 885 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5. 886 887 o Minor bugfixes (compilation, backport from 0.4.5.3-rc): 888 - Fix a compilation warning about unreachable fallthrough 889 annotations when building with "--enable-all-bugs-are-fatal" on 890 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha. 891 892 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc): 893 - Handle partial SOCKS5 messages correctly. Previously, our code 894 would send an incorrect error message if it got a SOCKS5 request 895 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha. 896 897 o Minor bugfixes (testing, backport from 0.4.5.2-alpha): 898 - Fix the `config/parse_tcp_proxy_line` test so that it works 899 correctly on systems where the DNS provider hijacks invalid 900 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha. 901 - Fix our Python reference-implementation for the v3 onion service 902 handshake so that it works correctly with the version of hashlib 903 provided by Python 3.9. Fixes part of bug 40179; bugfix 904 on 0.3.1.6-rc. 905 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL 906 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha. 907 908 909Changes in version 0.4.3.8 - 2021-02-03 910 Tor 0.4.3.8 backports numerous bugfixes from later releases, 911 including one that made v3 onion services more susceptible to 912 denial-of-service attacks, and a feature that makes some kinds of 913 DoS attacks harder to perform. 914 915 Note that this is, in all likelihood, the last release of Tor 0.4.3.x, 916 which will reach end-of-life on 15 Feb 2021. 917 918 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc): 919 - Stop requiring a live consensus for v3 clients and services, and 920 allow a "reasonably live" consensus instead. This allows v3 onion 921 services to work even if the authorities fail to generate a 922 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix 923 on 0.3.5.1-alpha. 924 925 o Major bugfixes (stats, onion services, backport from 0.4.4.5): 926 - Fix a bug where we were undercounting the Tor network's total 927 onion service traffic, by ignoring any traffic originating from 928 clients. Now we count traffic from both clients and services. 929 Fixes bug 40117; bugfix on 0.2.6.2-alpha. 930 931 o Major feature (exit, backport from 0.4.5.5-rc): 932 - Re-entry into the network is now denied at the Exit level to all 933 relays' ORPorts and authorities' ORPorts and DirPorts. This change 934 should help mitgate a set of denial-of-service attacks. Closes 935 ticket 2667. 936 937 o Minor feature (build system, backport from 0.4.5.4-rc): 938 - New "make lsp" command to generate the compile_commands.json file 939 used by the ccls language server. The "bear" program is needed for 940 this. Closes ticket 40227. 941 942 o Minor features (compilation, backport from 0.4.5.2-rc): 943 - Disable deprecation warnings when building with OpenSSL 3.0.0 or 944 later. There are a number of APIs newly deprecated in OpenSSL 945 3.0.0 that Tor still requires. (A later version of Tor will try to 946 stop depending on these APIs.) Closes ticket 40165. 947 948 o Minor features (crypto, backport from 0.4.5.3-rc): 949 - Fix undefined behavior on our Keccak library. The bug only 950 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel) 951 and would result in wrong digests. Fixes bug 40210; bugfix on 952 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and 953 weasel for diagnosing this. 954 955 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc): 956 - Strip '\r' characters when reading text files on Unix platforms. 957 This should resolve an issue where a relay operator migrates a 958 relay from Windows to Unix, but does not change the line ending of 959 Tor's various state files to match the platform, and the CRLF line 960 endings from Windows end up leaking into other files such as the 961 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5. 962 963 o Minor bugfixes (compilation, backport from 0.4.5.1-rc): 964 - Resolve a compilation warning that could occur in 965 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha. 966 967 o Minor bugfixes (compilation, backport from 0.4.5.3-rc): 968 - Fix a compilation warning about unreachable fallthrough 969 annotations when building with "--enable-all-bugs-are-fatal" on 970 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha. 971 972 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc): 973 - Handle partial SOCKS5 messages correctly. Previously, our code 974 would send an incorrect error message if it got a SOCKS5 request 975 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha. 976 977 o Minor bugfixes (testing, backport from 0.4.5.2-alpha): 978 - Fix the `config/parse_tcp_proxy_line` test so that it works 979 correctly on systems where the DNS provider hijacks invalid 980 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha. 981 - Fix our Python reference-implementation for the v3 onion service 982 handshake so that it works correctly with the version of hashlib 983 provided by Python 3.9. Fixes part of bug 40179; bugfix 984 on 0.3.1.6-rc. 985 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL 986 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha. 987 988 989Changes in version 0.3.5.13 - 2020-02-03 990 Tor 0.3.5.13 backports numerous bugfixes from later releases, 991 including one that made v3 onion services more susceptible to 992 denial-of-service attacks, and a feature that makes some kinds of 993 DoS attacks harder to perform. 994 995 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc): 996 - Stop requiring a live consensus for v3 clients and services, and 997 allow a "reasonably live" consensus instead. This allows v3 onion 998 services to work even if the authorities fail to generate a 999 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix 1000 on 0.3.5.1-alpha. 1001 1002 o Major bugfixes (stats, onion services, backport from 0.4.4.5): 1003 - Fix a bug where we were undercounting the Tor network's total 1004 onion service traffic, by ignoring any traffic originating from 1005 clients. Now we count traffic from both clients and services. 1006 Fixes bug 40117; bugfix on 0.2.6.2-alpha. 1007 1008 o Major feature (exit, backport from 0.4.5.5-rc): 1009 - Re-entry into the network is now denied at the Exit level to all 1010 relays' ORPorts and authorities' ORPorts and DirPorts. This change 1011 should help mitgate a set of denial-of-service attacks. Closes 1012 ticket 2667. 1013 1014 o Minor feature (build system, backport from 0.4.5.4-rc): 1015 - New "make lsp" command to generate the compile_commands.json file 1016 used by the ccls language server. The "bear" program is needed for 1017 this. Closes ticket 40227. 1018 1019 o Minor features (compilation, backport from 0.4.5.2-rc): 1020 - Disable deprecation warnings when building with OpenSSL 3.0.0 or 1021 later. There are a number of APIs newly deprecated in OpenSSL 1022 3.0.0 that Tor still requires. (A later version of Tor will try to 1023 stop depending on these APIs.) Closes ticket 40165. 1024 1025 o Minor features (crypto, backport from 0.4.5.3-rc): 1026 - Fix undefined behavior on our Keccak library. The bug only 1027 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel) 1028 and would result in wrong digests. Fixes bug 40210; bugfix on 1029 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and 1030 weasel for diagnosing this. 1031 1032 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc): 1033 - Strip '\r' characters when reading text files on Unix platforms. 1034 This should resolve an issue where a relay operator migrates a 1035 relay from Windows to Unix, but does not change the line ending of 1036 Tor's various state files to match the platform, and the CRLF line 1037 endings from Windows end up leaking into other files such as the 1038 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5. 1039 1040 o Minor bugfixes (compilation, backport from 0.4.5.1-rc): 1041 - Resolve a compilation warning that could occur in 1042 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha. 1043 1044 o Minor bugfixes (compilation, backport from 0.4.5.3-rc): 1045 - Fix a compilation warning about unreachable fallthrough 1046 annotations when building with "--enable-all-bugs-are-fatal" on 1047 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha. 1048 1049 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc): 1050 - Handle partial SOCKS5 messages correctly. Previously, our code 1051 would send an incorrect error message if it got a SOCKS5 request 1052 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha. 1053 1054 o Minor bugfixes (testing, backport from 0.4.5.2-alpha): 1055 - Fix our Python reference-implementation for the v3 onion service 1056 handshake so that it works correctly with the version of hashlib 1057 provided by Python 3.9. Fixes part of bug 40179; bugfix 1058 on 0.3.1.6-rc. 1059 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL 1060 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha. 1061 1062 1063Changes in version 0.4.5.5-rc - 2021-02-01 1064 Tor 0.4.5.5-rc is the third release candidate in its series. We're 1065 coming closer and closer to a stable release series. This release 1066 fixes an annoyance with address detection code, and somewhat mitigates 1067 an ongoing denial-of-service attack. 1068 1069 We anticipate no more code changes between this and the stable 1070 release, though of course that could change. 1071 1072 o Major feature (exit): 1073 - Re-entry into the network is now denied at the Exit level to all 1074 relays' ORPorts and authorities' ORPorts and DirPorts. This change 1075 should help mitgate a set of denial-of-service attacks. Closes 1076 ticket 2667. 1077 1078 o Minor bugfixes (relay, configuration): 1079 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort 1080 for it can be found in the configuration. Fixes bug 40254; bugfix 1081 on 0.4.5.1-alpha. 1082 1083 1084Changes in version 0.4.5.4-rc - 2021-01-22 1085 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes 1086 several bugs present in previous releases. 1087 1088 We expect that the stable release will be the same, or almost the 1089 same, as this release candidate, unless serious bugs are found. 1090 1091 o Major bugfixes (authority, IPv6): 1092 - Do not consider multiple relays in the same IPv6 /64 network to be 1093 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha. 1094 1095 o Major bugfixes (directory cache, performance, windows): 1096 - Limit the number of items in the consensus diff cache to 64 on 1097 Windows. We hope this will mitigate an issue where Windows relay 1098 operators reported Tor using 100% CPU, while we investigate better 1099 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha. 1100 1101 o Minor feature (build system): 1102 - New "make lsp" command to generate the compile_commands.json file 1103 used by the ccls language server. The "bear" program is needed for 1104 this. Closes ticket 40227. 1105 1106 o Minor features (authority, logging): 1107 - Log more information for directory authority operators during the 1108 consensus voting process, and while processing relay descriptors. 1109 Closes ticket 40245. 1110 - Reject obsolete router/extrainfo descriptors earlier and more 1111 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix 1112 on 0.4.5.1-alpha. 1113 1114 o Minor bugfixes (compilation): 1115 - Fix another warning about unreachable fallthrough annotations when 1116 building with "--enable-all-bugs-are-fatal" on some compilers. 1117 Fixes bug 40241; bugfix on 0.4.5.3-rc. 1118 - Change the linker flag ordering in our library search code so that 1119 it works for compilers that need the libraries to be listed in the 1120 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha. 1121 1122 o Minor bugfixes (config, bridge): 1123 - Don't initiate a connection to a bridge configured to use a 1124 missing transport. This change reverts an earlier fix that would 1125 try to avoid such situations during configuration chcecking, but 1126 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix 1127 on 0.4.5.1-alpha. 1128 1129 o Minor bugfixes (onion services): 1130 - Avoid a non-fatal assertion in certain edge-cases when 1131 establishing a circuit to an onion service. Fixes bug 32666; 1132 bugfix on 0.3.0.3-alpha. 1133 1134 o Minor bugfixes (relay): 1135 - If we were unable to build our descriptor, don't mark it as having 1136 been advertised. Also remove an harmless BUG(). Fixes bug 40231; 1137 bugfix on 0.4.5.1-alpha. 1138 1139 1140Changes in version 0.4.5.3-rc - 2021-01-12 1141 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes 1142 several bugs, including one that broke onion services on certain older 1143 ARM CPUs, and another that made v3 onion services less reliable. 1144 1145 Though we anticipate that we'll be doing a bit more clean-up between 1146 now and the stable release, we expect that our remaining changes will 1147 be fairly simple. There will be at least one more release candidate 1148 before 0.4.5.x is stable. 1149 1150 o Major bugfixes (onion service v3): 1151 - Stop requiring a live consensus for v3 clients and services, and 1152 allow a "reasonably live" consensus instead. This allows v3 onion 1153 services to work even if the authorities fail to generate a 1154 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix 1155 on 0.3.5.1-alpha. 1156 1157 o Minor features (crypto): 1158 - Fix undefined behavior on our Keccak library. The bug only 1159 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel) 1160 and would result in wrong digests. Fixes bug 40210; bugfix on 1161 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and 1162 weasel for diagnosing this. 1163 1164 o Minor features (documentation): 1165 - Mention the "!badexit" directive that can appear in an authority's 1166 approved-routers file, and update the description of the 1167 "!invalid" directive. Closes ticket 40188. 1168 1169 o Minor bugfixes (compilation): 1170 - Fix a compilation warning about unreachable fallthrough 1171 annotations when building with "--enable-all-bugs-are-fatal" on 1172 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha. 1173 - Fix the "--enable-static-tor" switch to properly set the "-static" 1174 compile option onto the tor binary only. Fixes bug 40111; bugfix 1175 on 0.2.3.1-alpha. 1176 1177 o Minor bugfixes (config, bridge): 1178 - Really fix the case where torrc has a missing ClientTransportPlugin 1179 but is configured with a Bridge line and UseBridges. Previously, 1180 we didn't look at the managed proxy list and thus would fail for 1181 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha. 1182 1183 o Minor bugfixes (logging, relay): 1184 - Log our address as reported by the directory authorities, if none 1185 was configured or detected before. Fixes bug 40201; bugfix 1186 on 0.4.5.1-alpha. 1187 - When a launching bandwidth testing circuit, don't incorrectly call 1188 it a reachability test, or trigger a "CHECKING_REACHABILITY" 1189 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha. 1190 1191 o Minor bugfixes (relay, statistics): 1192 - Report the correct connection statistics in our extrainfo 1193 documents. Previously there was a problem in the file loading 1194 function which would wrongly truncate a state file, causing the 1195 wrong information to be reported. Fixes bug 40226; bugfix 1196 on 0.4.5.1-alpha. 1197 1198 o Minor bugfixes (SOCKS5): 1199 - Handle partial SOCKS5 messages correctly. Previously, our code 1200 would send an incorrect error message if it got a SOCKS5 request 1201 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha. 1202 1203 1204Changes in version 0.4.5.2-alpha - 2020-11-23 1205 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series. 1206 It fixes several bugs present in earlier releases, including one that 1207 made it impractical to run relays on Windows. It also adds a few small 1208 safety features to improve Tor's behavior in the presence of strange 1209 compile-time options, misbehaving proxies, and future versions 1210 of OpenSSL. 1211 1212 o Major bugfixes (relay, windows): 1213 - Fix a bug in our implementation of condition variables on Windows. 1214 Previously, a relay on Windows would use 100% CPU after running 1215 for some time. Because of this change, Tor now require Windows 1216 Vista or later to build and run. Fixes bug 30187; bugfix on 1217 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with 1218 the introduction of consensus diffs.) Patch by Daniel Pinto. 1219 1220 o Minor features (compilation): 1221 - Disable deprecation warnings when building with OpenSSL 3.0.0 or 1222 later. There are a number of APIs newly deprecated in OpenSSL 1223 3.0.0 that Tor still requires. (A later version of Tor will try to 1224 stop depending on these APIs.) Closes ticket 40165. 1225 1226 o Minor features (protocol, proxy support, defense in depth): 1227 - Respond more deliberately to misbehaving proxies that leave 1228 leftover data on their connections, so as to make Tor even less 1229 likely to allow the proxies to pass their data off as having come 1230 from a relay. Closes ticket 40017. 1231 1232 o Minor features (safety): 1233 - Log a warning at startup if Tor is built with compile-time options 1234 that are likely to make it less stable or reliable. Closes 1235 ticket 18888. 1236 1237 o Minor bugfixes (circuit, handshake): 1238 - In the v3 handshaking code, use connection_or_change_state() to 1239 change the state. Previously, we changed the state directly, but 1240 this did not pass the state change to the pubsub or channel 1241 objects, potentially leading to bugs. Fixes bug 32880; bugfix on 1242 0.2.3.6-alpha. Patch by Neel Chauhan. 1243 1244 o Minor bugfixes (compilation): 1245 - Use the correct 'ranlib' program when building libtor.a. 1246 Previously we used the default ranlib, which broke some kinds of 1247 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha. 1248 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177; 1249 bugfix on 0.4.5.1-alpha. 1250 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't 1251 attempt to build. Linux supports that macro but not the BSDs. 1252 Fixes bug 40174; bugfix on 0.4.5.1-alpha. 1253 1254 o Minor bugfixes (configuration): 1255 - Exit Tor on a misconfiguration when the Bridge line is configured 1256 to use a transport but no corresponding ClientTransportPlugin can 1257 be found. Prior to this fix, Tor would attempt to connect to the 1258 bridge directly without using the transport, making it easier for 1259 adversaries to notice the bridge. Fixes bug 25528; bugfix 1260 on 0.2.6.1-alpha. 1261 - Fix an issue where an ORPort was compared with other kinds of 1262 ports, when it should have been only checked against other 1263 ORPorts. This bug would lead to "DirPort auto" getting ignored. 1264 Fixes bug 40195; bugfix on 0.4.5.1-alpha. 1265 - Fix a bug where a second non-ORPort with a variant family (ex: 1266 SocksPort [::1]:9050) would be ignored due to a configuration 1267 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha. 1268 1269 o Minor bugfixes (crash, relay, signing key): 1270 - Avoid assertion failures when we run Tor from the command line 1271 with `--key-expiration sign`, but an ORPort is not set. Fixes bug 1272 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan. 1273 1274 o Minor bugfixes (logging): 1275 - Remove trailing whitespace from control event log messages. Fixes 1276 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by 1277 Amadeusz Pawlik. 1278 - Turn warning-level log message about SENDME failure into a debug- 1279 level message. (This event can happen naturally, and is no reason 1280 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha. 1281 1282 o Minor bugfixes (relay, address discovery): 1283 - Don't trigger an IP change when no new valid IP can be found. 1284 Fixes bug 40071; bugfix on 0.4.5.1-alpha. 1285 - When attempting to discover our IP, use a simple test circuit, 1286 rather than a descriptor fetch: the same address information is 1287 present in NETINFO cells, and is better authenticated there. Fixes 1288 bug 40071; bugfix on 0.4.5.1-alpha. 1289 1290 o Minor bugfixes (testing): 1291 - Fix the `config/parse_tcp_proxy_line` test so that it works 1292 correctly on systems where the DNS provider hijacks invalid 1293 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha. 1294 - Fix unit tests that used newly generated list of routers so that 1295 they check them with respect to the date when they were generated, 1296 not with respect to the current time. Fixes bug 40187; bugfix 1297 on 0.4.5.1-alpha. 1298 - Fix our Python reference-implementation for the v3 onion service 1299 handshake so that it works correctly with the version of hashlib 1300 provided by Python 3.9. Fixes part of bug 40179; bugfix 1301 on 0.3.1.6-rc. 1302 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL 1303 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha. 1304 1305 o Removed features (controller): 1306 - Remove the "GETINFO network-status" controller command. It has 1307 been deprecated since 0.3.1.1-alpha. Closes ticket 22473. 1308 1309 1310Changes in version 0.4.4.6 - 2020-11-12 1311 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It 1312 backports fixes from later releases, including a fix for TROVE-2020- 1313 005, a security issue that could be used, under certain cases, by an 1314 adversary to observe traffic patterns on a limited number of circuits 1315 intended for a different relay. 1316 1317 o Major bugfixes (security, backport from 0.4.5.1-alpha): 1318 - When completing a channel, relays now check more thoroughly to 1319 make sure that it matches any pending circuits before attaching 1320 those circuits. Previously, address correctness and Ed25519 1321 identities were not checked in this case, but only when extending 1322 circuits on an existing channel. Fixes bug 40080; bugfix on 1323 0.2.7.2-alpha. Resolves TROVE-2020-005. 1324 1325 o Minor features (directory authorities, backport from 0.4.5.1-alpha): 1326 - Authorities now list a different set of protocols as required and 1327 recommended. These lists have been chosen so that only truly 1328 recommended and/or required protocols are included, and so that 1329 clients using 0.2.9 or later will continue to work (even though 1330 they are not supported), whereas only relays running 0.3.5 or 1331 later will meet the requirements. Closes ticket 40162. 1332 - Make it possible to specify multiple ConsensusParams torrc lines. 1333 Now directory authority operators can for example put the main 1334 ConsensusParams config in one torrc file and then add to it from a 1335 different torrc file. Closes ticket 40164. 1336 1337 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha): 1338 - Tor no longer allows subprotocol versions larger than 63. 1339 Previously version numbers up to UINT32_MAX were allowed, which 1340 significantly complicated our code. Implements proposal 318; 1341 closes ticket 40133. 1342 1343 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha): 1344 - Fix a rendezvous cache unit test that was triggering an underflow 1345 on the global rend cache allocation. Fixes bug 40125; bugfix 1346 on 0.2.8.1-alpha. 1347 - Fix another rendezvous cache unit test that was triggering an 1348 underflow on the global rend cache allocation. Fixes bug 40126; 1349 bugfix on 0.2.8.1-alpha. 1350 1351 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha): 1352 - Fix compiler warnings that would occur when building with 1353 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the 1354 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha. 1355 - Resolve a compilation warning that could occur in 1356 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha. 1357 1358 o Minor bugfixes (logging, backport from 0.4.5.1-alpha): 1359 - Remove a debug logging statement that uselessly spammed the logs. 1360 Fixes bug 40135; bugfix on 0.3.5.0-alpha. 1361 1362 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha): 1363 - Avoid a fatal assert() when failing to create a listener 1364 connection for an address that was in use. Fixes bug 40073; bugfix 1365 on 0.3.5.1-alpha. 1366 1367 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha): 1368 - For HSFETCH commands on v2 onion services addresses, check the 1369 length of bytes decoded, not the base32 length. Fixes bug 34400; 1370 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan. 1371 1372 1373Changes in version 0.4.3.7 - 2020-11-12 1374 Tor 0.4.3.7 backports several bugfixes from later releases. It 1375 includes a fix for TROVE-2020-005, a security issue that could be 1376 used, under certain cases, by an adversary to observe traffic patterns 1377 on a limited number of circuits intended for a different relay. 1378 1379 Please be aware that support for the 0.4.3.x series will end on 15 1380 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or 1381 downgrade to 0.3.5.x, which will be supported until at least 1 1382 February 2022. 1383 1384 o Major features (fallback directory list, backport form 0.4.4.3-alpha): 1385 - Replace the 148 fallback directories originally included in Tor 1386 0.4.1.4-rc (of which around 105 are still functional) with a list 1387 of 144 fallbacks generated in July 2020. Closes ticket 40061. 1388 1389 o Major bugfixes (security, backport from 0.4.5.1-alpha): 1390 - When completing a channel, relays now check more thoroughly to 1391 make sure that it matches any pending circuits before attaching 1392 those circuits. Previously, address correctness and Ed25519 1393 identities were not checked in this case, but only when extending 1394 circuits on an existing channel. Fixes bug 40080; bugfix on 1395 0.2.7.2-alpha. Resolves TROVE-2020-005. 1396 1397 o Major bugfixes (NSS, backport from 0.4.4.3-alpha): 1398 - When running with NSS enabled, make sure that NSS knows to expect 1399 nonblocking sockets. Previously, we set our TCP sockets as 1400 nonblocking, but did not tell NSS, which in turn could lead to 1401 unexpected blocking behavior. Fixes bug 40035; bugfix 1402 on 0.3.5.1-alpha. 1403 1404 o Minor features (security, backport from 0.4.4.4-rc): 1405 - Channels using obsolete versions of the Tor link protocol are no 1406 longer allowed to circumvent address-canonicity checks. (This is 1407 only a minor issue, since such channels have no way to set ed25519 1408 keys, and therefore should always be rejected for circuits that 1409 specify ed25519 identities.) Closes ticket 40081. 1410 1411 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha): 1412 - Tor no longer allows subprotocol versions larger than 63. 1413 Previously version numbers up to UINT32_MAX were allowed, which 1414 significantly complicated our code. Implements proposal 318; 1415 closes ticket 40133. 1416 1417 o Minor features (tests, backport from 0.4.4.5): 1418 - Our "make check" target now runs the unit tests in 8 parallel 1419 chunks. Doing this speeds up hardened CI builds by more than a 1420 factor of two. Closes ticket 40098. 1421 1422 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha): 1423 - Fix a rendezvous cache unit test that was triggering an underflow 1424 on the global rend cache allocation. Fixes bug 40125; bugfix 1425 on 0.2.8.1-alpha. 1426 - Fix another rendezvous cache unit test that was triggering an 1427 underflow on the global rend cache allocation. Fixes bug 40126; 1428 bugfix on 0.2.8.1-alpha. 1429 1430 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc): 1431 - Fix a correctness bug that could cause an assertion failure if we 1432 ever tried using the buf_move_all() function with an empty input 1433 buffer. As far as we know, no released versions of Tor do this. 1434 Fixes bug 40076; bugfix on 0.3.3.1-alpha. 1435 1436 o Minor bugfixes (logging, backport from 0.4.5.1-alpha): 1437 - Remove a debug logging statement that uselessly spammed the logs. 1438 Fixes bug 40135; bugfix on 0.3.5.0-alpha. 1439 1440 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc): 1441 - On a bridge, treat all connections from an ExtORPort as remote by 1442 default for the purposes of rate-limiting. Previously, bridges 1443 would treat the connection as local unless they explicitly 1444 received a "USERADDR" command. ExtORPort connections still count 1445 as local if there is a USERADDR command with an explicit local 1446 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha. 1447 1448 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha): 1449 - Avoid a fatal assert() when failing to create a listener 1450 connection for an address that was in use. Fixes bug 40073; bugfix 1451 on 0.3.5.1-alpha. 1452 1453 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha): 1454 - Adjust the rules for when to warn about having too many 1455 connections to other relays. Previously we'd tolerate up to 1.5 1456 connections per relay on average. Now we tolerate more connections 1457 for directory authorities, and raise the number of total 1458 connections we need to see before we warn. Fixes bug 33880; bugfix 1459 on 0.3.1.1-alpha. 1460 1461 o Minor bugfixes (tests, 0.4.4.5): 1462 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run 1463 on its own. Previously, it would exit with an error. Fixes bug 1464 40099; bugfix on 0.2.8.1-alpha. 1465 1466 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha): 1467 - For HSFETCH commands on v2 onion services addresses, check the 1468 length of bytes decoded, not the base32 length. Fixes bug 34400; 1469 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan. 1470 1471 o Minor bugfixes (windows, backport from 0.4.4.4-rc): 1472 - Fix a bug that prevented Tor from starting if its log file grew 1473 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha. 1474 1475 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha): 1476 - Add a deprecation warning for version 2 onion services. Closes 1477 ticket 40003. 1478 1479 o Removed features (backport from 0.4.4.3-alpha): 1480 - Our "check-local" test target no longer tries to use the 1481 Coccinelle semantic patching tool parse all the C files. While it 1482 is a good idea to try to make sure Coccinelle works on our C 1483 before we run a Coccinelle patch, doing so on every test run has 1484 proven to be disruptive. You can still run this tool manually with 1485 "make check-cocci". Closes ticket 40030. ticket 40030. 1486 1487 1488Changes in version 0.3.5.12 - 2020-11-12 1489 Tor 0.4.3.7 backports several bugfixes from later releases. It 1490 includes a fix for TROVE-2020-005, a security issue that could be 1491 used, under certain cases, by an adversary to observe traffic patterns 1492 on a limited number of circuits intended for a different relay. 1493 1494 o Major features (fallback directory list, backport form 0.4.4.3-alpha): 1495 - Replace the 148 fallback directories originally included in Tor 1496 0.4.1.4-rc (of which around 105 are still functional) with a list 1497 of 144 fallbacks generated in July 2020. Closes ticket 40061. 1498 1499 o Major bugfixes (security, backport from 0.4.5.1-alpha): 1500 - When completing a channel, relays now check more thoroughly to 1501 make sure that it matches any pending circuits before attaching 1502 those circuits. Previously, address correctness and Ed25519 1503 identities were not checked in this case, but only when extending 1504 circuits on an existing channel. Fixes bug 40080; bugfix on 1505 0.2.7.2-alpha. Resolves TROVE-2020-005. 1506 1507 o Major bugfixes (NSS, backport from 0.4.4.3-alpha): 1508 - When running with NSS enabled, make sure that NSS knows to expect 1509 nonblocking sockets. Previously, we set our TCP sockets as 1510 nonblocking, but did not tell NSS, which in turn could lead to 1511 unexpected blocking behavior. Fixes bug 40035; bugfix 1512 on 0.3.5.1-alpha. 1513 1514 o Minor features (security, backport from 0.4.4.4-rc): 1515 - Channels using obsolete versions of the Tor link protocol are no 1516 longer allowed to circumvent address-canonicity checks. (This is 1517 only a minor issue, since such channels have no way to set ed25519 1518 keys, and therefore should always be rejected for circuits that 1519 specify ed25519 identities.) Closes ticket 40081. 1520 1521 o Minor features (debugging, directory system): 1522 - Don't crash when we find a non-guard with a guard-fraction value 1523 set. Instead, log a bug warning, in an attempt to figure out how 1524 this happened. Diagnostic for ticket 32868. 1525 1526 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha): 1527 - Tor no longer allows subprotocol versions larger than 63. 1528 Previously version numbers up to UINT32_MAX were allowed, which 1529 significantly complicated our code. Implements proposal 318; 1530 closes ticket 40133. 1531 1532 o Minor features (tests, backport from 0.4.4.5): 1533 - Our "make check" target now runs the unit tests in 8 parallel 1534 chunks. Doing this speeds up hardened CI builds by more than a 1535 factor of two. Closes ticket 40098. 1536 1537 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha): 1538 - Fix a rendezvous cache unit test that was triggering an underflow 1539 on the global rend cache allocation. Fixes bug 40125; bugfix 1540 on 0.2.8.1-alpha. 1541 - Fix another rendezvous cache unit test that was triggering an 1542 underflow on the global rend cache allocation. Fixes bug 40126; 1543 bugfix on 0.2.8.1-alpha. 1544 1545 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc): 1546 - Fix a correctness bug that could cause an assertion failure if we 1547 ever tried using the buf_move_all() function with an empty input 1548 buffer. As far as we know, no released versions of Tor do this. 1549 Fixes bug 40076; bugfix on 0.3.3.1-alpha. 1550 1551 o Minor bugfixes (logging, backport from 0.4.5.1-alpha): 1552 - Remove a debug logging statement that uselessly spammed the logs. 1553 Fixes bug 40135; bugfix on 0.3.5.0-alpha. 1554 1555 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc): 1556 - On a bridge, treat all connections from an ExtORPort as remote by 1557 default for the purposes of rate-limiting. Previously, bridges 1558 would treat the connection as local unless they explicitly 1559 received a "USERADDR" command. ExtORPort connections still count 1560 as local if there is a USERADDR command with an explicit local 1561 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha. 1562 1563 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha): 1564 - Avoid a fatal assert() when failing to create a listener 1565 connection for an address that was in use. Fixes bug 40073; bugfix 1566 on 0.3.5.1-alpha. 1567 1568 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha): 1569 - Adjust the rules for when to warn about having too many 1570 connections to other relays. Previously we'd tolerate up to 1.5 1571 connections per relay on average. Now we tolerate more connections 1572 for directory authorities, and raise the number of total 1573 connections we need to see before we warn. Fixes bug 33880; bugfix 1574 on 0.3.1.1-alpha. 1575 1576 o Minor bugfixes (relays, backport from 0.4.4.1-alpha): 1577 - Stop advertising incorrect IPv6 ORPorts in relay and bridge 1578 descriptors, when the IPv6 port was configured as "auto". Fixes 1579 bug 32588; bugfix on 0.2.3.9-alpha. 1580 1581 o Minor bugfixes (tests, 0.4.4.5): 1582 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run 1583 on its own. Previously, it would exit with an error. Fixes bug 1584 40099; bugfix on 0.2.8.1-alpha. 1585 1586 o Minor bugfixes (windows, backport from 0.4.4.4-rc): 1587 - Fix a bug that prevented Tor from starting if its log file grew 1588 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha. 1589 1590 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha): 1591 - Add a deprecation warning for version 2 onion services. Closes 1592 ticket 40003. 1593 1594 1595Changes in version 0.4.5.1-alpha - 2020-11-01 1596 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It 1597 improves support for IPv6, address discovery and self-testing, code 1598 metrics and tracing. 1599 1600 This release also fixes TROVE-2020-005, a security issue that could be 1601 used, under certain cases, by an adversary to observe traffic patterns 1602 on a limited number of circuits intended for a different relay. To 1603 mount this attack, the adversary would need to actively extend 1604 circuits to an incorrect address, as well as compromise a relay's 1605 legacy RSA-1024 key. We'll be backporting this fix to other release 1606 series soon, after it has had some testing. 1607 1608 Here are the changes since 0.4.4.5. 1609 1610 o Major features (build): 1611 - When building Tor, first link all object files into a single 1612 static library. This may help with embedding Tor in other 1613 programs. Note that most Tor functions do not constitute a part of 1614 a stable or supported API: only those functions in tor_api.h 1615 should be used if embedding Tor. Closes ticket 40127. 1616 1617 o Major features (metrics): 1618 - Introduce a new MetricsPort which exposes, through an HTTP 1619 interface, a series of metrics that tor collects at runtime. At 1620 the moment, the only supported output format is Prometheus data 1621 model. Closes ticket 40063. See the manual page for more 1622 information and security considerations. 1623 o Major features (relay, IPv6): 1624 - The torrc option Address now supports IPv6. This unifies our 1625 address discovery interface to support IPv4, IPv6, and hostnames. 1626 Closes ticket 33233. 1627 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and 1628 bridges. Closes ticket 33222. 1629 - Relays now automatically bind on IPv6 for their ORPort, unless 1630 specified otherwise with the IPv4Only flag. Closes ticket 33246. 1631 - When a relay with IPv6 support is told to open a connection to 1632 another relay, and the extend cell lists both IPv4 and IPv6 1633 addresses, the first relay now picks randomly which address to 1634 use. Closes ticket 33220. 1635 - Relays now track their IPv6 ORPort reachability separately from 1636 the reachability of their IPv4 ORPort. They will not publish a 1637 descriptor unless _both_ ports appear to be externally reachable. 1638 Closes ticket 34067. 1639 1640 o Major features (tracing): 1641 - Add event-tracing library support for USDT and LTTng-UST, and a 1642 few tracepoints in the circuit subsystem. More will come 1643 incrementally. This feature is compiled out by default: it needs 1644 to be enabled at configure time. See documentation in 1645 doc/HACKING/Tracing.md. Closes ticket 32910. 1646 1647 o Major bugfixes (security): 1648 - When completing a channel, relays now check more thoroughly to 1649 make sure that it matches any pending circuits before attaching 1650 those circuits. Previously, address correctness and Ed25519 1651 identities were not checked in this case, but only when extending 1652 circuits on an existing channel. Fixes bug 40080; bugfix on 1653 0.2.7.2-alpha. Resolves TROVE-2020-005. 1654 1655 o Major bugfixes (TLS, buffer): 1656 - When attempting to read N bytes on a TLS connection, really try to 1657 read all N bytes. Previously, Tor would stop reading after the 1658 first TLS record, which can be smaller than the N bytes requested, 1659 and not check for more data until the next mainloop event. Fixes 1660 bug 40006; bugfix on 0.1.0.5-rc. 1661 1662 o Minor features (address discovery): 1663 - If no Address statements are found, relays now prioritize guessing 1664 their address by looking at the local interface instead of the 1665 local hostname. If the interface address can't be found, the local 1666 hostname is used. Closes ticket 33238. 1667 1668 o Minor features (admin tools): 1669 - Add a new --format argument to -key-expiration option to allow 1670 specifying the time format of the expiration date. Adds Unix 1671 timestamp format support. Patch by Daniel Pinto. Closes 1672 ticket 30045. 1673 1674 o Minor features (bootstrap reporting): 1675 - When reporting bootstrapping status on a relay, do not consider 1676 connections that have never been the target of an origin circuit. 1677 Previously, all connection failures were treated as potential 1678 bootstrapping failures, including connections that had been opened 1679 because of client requests. Closes ticket 25061. 1680 1681 o Minor features (build): 1682 - When running the configure script, try to detect version 1683 mismatches between the OpenSSL headers and libraries, and suggest 1684 that the user should try "--with-openssl-dir". Closes 40138. 1685 - If the configure script has given any warnings, remind the user 1686 about them at the end of the script. Related to 40138. 1687 1688 o Minor features (configuration): 1689 - Allow using wildcards (* and ?) with the %include option on 1690 configuration files. Closes ticket 25140. Patch by Daniel Pinto. 1691 - Allow the configuration options EntryNodes, ExcludeNodes, 1692 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and 1693 HSLayer3Nodes to be specified multiple times. Closes ticket 28361. 1694 Patch by Daniel Pinto. 1695 1696 o Minor features (control port): 1697 - Add a DROPTIMEOUTS command to drop circuit build timeout history 1698 and reset the current timeout. Closes ticket 40002. 1699 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status, 1700 send a control port event. Closes ticket 32190. Patch by 1701 Neel Chauhan. 1702 - Introduce GETINFO "stats/ntor/{assigned/requested}" and 1703 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit 1704 onion handshake counts respectively. Closes ticket 28279. Patch by 1705 Neel Chauhan. 1706 1707 o Minor features (control port, IPv6): 1708 - Tor relays now try to report to the controller when they are 1709 launching an IPv6 self-test. Closes ticket 34068. 1710 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the 1711 control port to fetch the Tor host's respective IPv4 or IPv6 1712 address. We keep "GETINFO address" for backwards-compatibility. 1713 Closes ticket 40039. Patch by Neel Chauhan. 1714 1715 o Minor features (directory authorities): 1716 - Authorities now list a different set of protocols as required and 1717 recommended. These lists have been chosen so that only truly 1718 recommended and/or required protocols are included, and so that 1719 clients using 0.2.9 or later will continue to work (even though 1720 they are not supported), whereas only relays running 0.3.5 or 1721 later will meet the requirements. Closes ticket 40162. 1722 - Add a new consensus method 30 that removes the unnecessary "=" 1723 padding from ntor-onion-key. Closes ticket 7869. Patch by 1724 Daniel Pinto. 1725 - Directory authorities now reject descriptors from relays running 1726 Tor versions from the obsolete 0.4.1 series. Resolves ticket 1727 34357. Patch by Neel Chauhan. 1728 - Make it possible to specify multiple ConsensusParams torrc lines. 1729 Now directory authority operators can for example put the main 1730 ConsensusParams config in one torrc file and then add to it from a 1731 different torrc file. Closes ticket 40164. 1732 - The AssumeReachable option no longer stops directory authorities 1733 from checking whether other relays are running. A new 1734 AuthDirTestReachability option can be used to disable these 1735 checks. Closes ticket 34445. 1736 - When looking for possible Sybil attacks, also consider IPv6 1737 addresses. Two routers are considered to have "the same" address 1738 by this metric if they are in the same /64 network. Patch from 1739 Maurice Pibouin. Closes ticket 7193. 1740 1741 o Minor features (directory authorities, IPv6): 1742 - Make authorities add their IPv6 ORPort (if any) to the trusted 1743 servers list. Authorities previously added only their IPv4 1744 addresses. Closes ticket 32822. 1745 1746 o Minor features (ed25519, relay): 1747 - Save a relay's base64-encoded ed25519 identity key to the data 1748 directory in a file named fingerprint-ed25519. Closes ticket 1749 30642. Patch by Neel Chauhan. 1750 1751 o Minor features (heartbeat): 1752 - Include the total number of inbound and outbound IPv4 and IPv6 1753 connections in the heartbeat message. Closes ticket 29113. 1754 1755 o Minor features (IPv6, ExcludeNodes): 1756 - Handle IPv6 addresses in ExcludeNodes; previously they were 1757 ignored. Closes ticket 34065. Patch by Neel Chauhan. 1758 1759 o Minor features (logging): 1760 - Add the running glibc version to the log, and the compiled glibc 1761 version to the library list returned when using --library-versions. 1762 Patch from Daniel Pinto. Closes ticket 40047. 1763 - Consider an HTTP 301 response to be an error (like a 404) when 1764 processing a directory response. Closes ticket 40053. 1765 - Log directory fetch statistics as a single line. Closes 1766 ticket 40159. 1767 - Provide more complete descriptions of our connections when logging 1768 about them. Closes ticket 40041. 1769 - When describing a relay in the logs, we now include its ed25519 1770 identity. Closes ticket 22668. 1771 1772 o Minor features (onion services): 1773 - Only overwrite an onion service's existing hostname file if its 1774 contents are wrong. This enables read-only onion-service 1775 directories. Resolves ticket 40062. Patch by Neel Chauhan. 1776 1777 o Minor features (pluggable transports): 1778 - Add an OutboundBindAddressPT option to allow users to specify 1779 which IPv4 and IPv6 address pluggable transports should use for 1780 outgoing IP packets. Tor does not have a way to enforce that the 1781 pluggable transport honors this option, so each pluggable transport 1782 needs to implement support on its own. Closes ticket 5304. 1783 1784 o Minor features (relay address tracking): 1785 - We now store relay addresses for OR connections in a more logical 1786 way. Previously we would sometimes overwrite the actual address of 1787 a connection with a "canonical address", and then store the "real 1788 address" elsewhere to remember it. We now track the "canonical 1789 address" elsewhere for the cases where we need it, and leave the 1790 connection's address alone. Closes ticket 33898. 1791 1792 o Minor features (relay): 1793 - If a relay is unable to discover its address, attempt to learn it 1794 from the NETINFO cell. Closes ticket 40022. 1795 - Log immediately when launching a relay self-check. Previously we 1796 would try to log before launching checks, or approximately when we 1797 intended to launch checks, but this tended to be error-prone. 1798 Closes ticket 34137. 1799 1800 o Minor features (relay, address discovery): 1801 - If Address option is not found in torrc, attempt to learn our 1802 address with the configured ORPort address if any. Closes 1803 ticket 33236. 1804 1805 o Minor features (relay, IPv6): 1806 - Add an AssumeReachableIPv6 option to disable self-checking IPv6 1807 reachability. Closes part of ticket 33224. 1808 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus 1809 parameters to be used in an emergency to tell relays that they 1810 should publish even if they cannot complete their ORPort self- 1811 checks. Closes ticket 34064 and part of 33224. 1812 - Allow relays to send IPv6-only extend cells. Closes ticket 33222. 1813 - Declare support for the Relay=3 subprotocol version. Closes 1814 ticket 33226. 1815 - When launching IPv6 ORPort self-test circuits, make sure that the 1816 second-last hop can initiate an IPv6 extend. Closes ticket 33222. 1817 1818 o Minor features (specification update): 1819 - Several fields in microdescriptors, router descriptors, and 1820 consensus documents that were formerly optional are now required. 1821 Implements proposal 315; closes ticket 40132. 1822 1823 o Minor features (state management): 1824 - When loading the state file, remove entries from the statefile 1825 that have been obsolete for a long time. Ordinarily Tor preserves 1826 unrecognized entries in order to keep forward-compatibility, but 1827 these entries have not actually been used in any release since 1828 before 0.3.5.x. Closes ticket 40137. 1829 1830 o Minor features (statistics, ipv6): 1831 - Relays now publish IPv6-specific counts of single-direction versus 1832 bidirectional relay connections. Closes ticket 33264. 1833 - Relays now publish their IPv6 read and write statistics over time, 1834 if statistics are enabled. Closes ticket 33263. 1835 1836 o Minor features (subprotocol versions): 1837 - Tor no longer allows subprotocol versions larger than 63. 1838 Previously version numbers up to UINT32_MAX were allowed, which 1839 significantly complicated our code. Implements proposal 318; 1840 closes ticket 40133. 1841 - Use the new limitations on subprotocol versions due to proposal 1842 318 to simplify our implementation. Part of ticket 40133. 1843 1844 o Minor features (testing configuration): 1845 - The TestingTorNetwork option no longer implicitly sets 1846 AssumeReachable to 1. This change allows us to test relays' self- 1847 testing mechanisms, and to test authorities' relay-testing 1848 functionality. Closes ticket 34446. 1849 1850 o Minor features (testing): 1851 - Added unit tests for channel_matches_target_addr_for_extend(). 1852 Closes Ticket 33919. Patch by MrSquanchee. 1853 1854 o Minor features (tests, v2 onion services): 1855 - Fix a rendezvous cache unit test that was triggering an underflow 1856 on the global rend cache allocation. Fixes bug 40125; bugfix 1857 on 0.2.8.1-alpha. 1858 - Fix another rendezvous cache unit test that was triggering an 1859 underflow on the global rend cache allocation. Fixes bug 40126; 1860 bugfix on 0.2.8.1-alpha. 1861 1862 o Minor bugfixes (circuit padding): 1863 - When circpad_send_padding_cell_for_callback is called, 1864 `is_padding_timer_scheduled` flag was not reset. Now it is set to 1865 0 at the top of that function. Fixes bug 32671; bugfix 1866 on 0.4.0.1-alpha. 1867 - Add a per-circuit padding machine instance counter, so we can 1868 differentiate between shutdown requests for old machines on a 1869 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha. 1870 - Add the ability to keep circuit padding machines if they match a 1871 set of circuit states or purposes. This allows us to have machines 1872 that start up under some conditions but don't shut down under 1873 others. We now use this mask to avoid starting up introduction 1874 circuit padding again after the machines have already completed. 1875 Fixes bug 32040; bugfix on 0.4.1.1-alpha. 1876 1877 o Minor bugfixes (compatibility): 1878 - Strip '\r' characters when reading text files on Unix platforms. 1879 This should resolve an issue where a relay operator migrates a 1880 relay from Windows to Unix, but does not change the line ending of 1881 Tor's various state files to match the platform, and the CRLF line 1882 endings from Windows end up leaking into other files such as the 1883 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5. 1884 1885 o Minor bugfixes (compilation): 1886 - Fix compiler warnings that would occur when building with 1887 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the 1888 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha. 1889 - Resolve a compilation warning that could occur in 1890 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha. 1891 1892 o Minor bugfixes (configuration): 1893 - Fix bug where %including a pattern ending with */ would include 1894 files and folders (instead of folders only) in versions of glibc < 1895 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by 1896 Daniel Pinto. 1897 1898 o Minor bugfixes (control port): 1899 - Make sure we send the SOCKS request address in relay begin cells 1900 when a stream is attached with the purpose 1901 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5. 1902 Patch by Neel Chauhan. 1903 1904 o Minor bugfixes (logging): 1905 - Remove a debug logging statement that uselessly spammed the logs. 1906 Fixes bug 40135; bugfix on 0.3.5.0-alpha. 1907 - When logging a rate-limited message about how many messages have 1908 been suppressed in the last N seconds, give an accurate value for 1909 N, rounded up to the nearest minute. Previously we would report 1910 the size of the rate-limiting interval, regardless of when the 1911 messages started to occur. Fixes bug 19431; bugfix 1912 on 0.2.2.16-alpha. 1913 1914 o Minor bugfixes (relay configuration, crash): 1915 - Avoid a fatal assert() when failing to create a listener 1916 connection for an address that was in use. Fixes bug 40073; bugfix 1917 on 0.3.5.1-alpha. 1918 1919 o Minor bugfixes (rust, protocol versions): 1920 - Declare support for the onion service introduction point denial of 1921 service extensions when building with Rust. Fixes bug 34248; 1922 bugfix on 0.4.2.1-alpha. 1923 - Make Rust protocol version support checks consistent with the 1924 undocumented error behavior of the corresponding C code. Fixes bug 1925 34251; bugfix on 0.3.3.5-rc. 1926 1927 o Minor bugfixes (self-testing): 1928 - When receiving an incoming circuit, only accept it as evidence 1929 that we are reachable if the declared address of its channel is 1930 the same address we think that we have. Otherwise, it could be 1931 evidence that we're reachable on some other address. Fixes bug 1932 20165; bugfix on 0.1.0.1-rc. 1933 1934 o Minor bugfixes (spec conformance): 1935 - Use the correct key type when generating signing->link 1936 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha. 1937 1938 o Minor bugfixes (subprotocol versions): 1939 - Consistently reject extra commas, instead of only rejecting 1940 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha. 1941 - In summarize_protover_flags(), treat empty strings the same as 1942 NULL. This prevents protocols_known from being set. Previously, we 1943 treated empty strings as normal strings, which led to 1944 protocols_known being set. Fixes bug 34232; bugfix on 1945 0.3.3.2-alpha. Patch by Neel Chauhan. 1946 1947 o Minor bugfixes (v2 onion services): 1948 - For HSFETCH commands on v2 onion services addresses, check the 1949 length of bytes decoded, not the base32 length. Fixes bug 34400; 1950 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan. 1951 1952 o Code simplification and refactoring: 1953 - Add and use a set of functions to perform down-casts on constant 1954 connection and channel pointers. Closes ticket 40046. 1955 - Refactor our code that logs descriptions of connections, channels, 1956 and the peers on them, to use a single call path. This change 1957 enables us to refactor the data types that they use, and eliminates 1958 many confusing usages of those types. Closes ticket 40041. 1959 - Refactor some common node selection code into a single function. 1960 Closes ticket 34200. 1961 - Remove the now-redundant 'outbuf_flushlen' field from our 1962 connection type. It was previously used for an older version of 1963 our rate-limiting logic. Closes ticket 33097. 1964 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*" 1965 instead, for consistency with other code. Closes ticket 18106. 1966 - Rename functions about "advertised" ports which are not in fact 1967 guaranteed to return the ports that have been advertised. Closes 1968 ticket 40055. 1969 - Split implementation of several command line options from 1970 options_init_from_torrc into smaller isolated functions. Patch by 1971 Daniel Pinto. Closes ticket 40102. 1972 - When an extend cell is missing an IPv4 or IPv6 address, fill in 1973 the address from the extend info. This is similar to what was done 1974 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by 1975 Neel Chauhan. 1976 1977 o Deprecated features: 1978 - The "non-builtin" argument to the "--dump-config" command is now 1979 deprecated. When it works, it behaves the same as "short", which 1980 you should use instead. Closes ticket 33398. 1981 1982 o Documentation: 1983 - Replace URLs from our old bugtracker so that they refer to the new 1984 bugtracker and wiki. Closes ticket 40101. 1985 1986 o Removed features: 1987 - We no longer ship or build a "tor.service" file for use with 1988 systemd. No distribution included this script unmodified, and we 1989 don't have the expertise ourselves to maintain this in a way that 1990 all the various systemd-based distributions can use. Closes 1991 ticket 30797. 1992 - We no longer ship support for the Android logging API. Modern 1993 versions of Android can use the syslog API instead. Closes 1994 ticket 32181. 1995 - The "optimistic data" feature is now always on; there is no longer 1996 an option to disable it from the torrc file or from the consensus 1997 directory. Closes part of 40139. 1998 - The "usecreatefast" network parameter is now removed; there is no 1999 longer an option for authorities to turn it off. Closes part 2000 of 40139. 2001 2002 o Testing: 2003 - Add unit tests for bandwidth statistics manipulation functions. 2004 Closes ticket 33812. Patch by MrSquanchee. 2005 2006 o Code simplification and refactoring (autoconf): 2007 - Remove autoconf checks for unused funcs and headers. Closes ticket 2008 31699; Patch by @bduszel 2009 2010 o Code simplification and refactoring (maintainer scripts): 2011 - Disable by default the pre-commit hook. Use the environment 2012 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it. 2013 Furthermore, stop running practracker in the pre-commit hook and 2014 make check-local. Closes ticket 40019. 2015 2016 o Code simplification and refactoring (relay address): 2017 - Most of IPv4 representation was using "uint32_t". It has now been 2018 moved to use the internal "tor_addr_t" interface instead. This is 2019 so we can properly integrate IPv6 along IPv4 with common 2020 interfaces. Closes ticket 40043. 2021 2022 o Documentation (manual page): 2023 - Move them from doc/ to doc/man/. Closes ticket 40044. 2024 - Describe the status of the "Sandbox" option more accurately. It is 2025 no longer "experimental", but it _is_ dependent on kernel and libc 2026 versions. Closes ticket 23378. 2027 2028 o Documentation (tracing): 2029 - Document in depth the circuit subsystem trace events in the new 2030 doc/tracing/EventsCircuit.md. Closes ticket 40036. 2031 2032 2033Changes in version 0.4.4.5 - 2020-09-15 2034 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This 2035 series improves our guard selection algorithms, adds v3 onion balance 2036 support, improves the amount of code that can be disabled when running 2037 without relay support, and includes numerous small bugfixes and 2038 enhancements. It also lays the ground for some IPv6 features that 2039 we'll be developing more in the next (0.4.5) series. 2040 2041 Per our support policy, we support each stable release series for nine 2042 months after its first stable release, or three months after the first 2043 stable release of the next series: whichever is longer. This means 2044 that 0.4.4.x will be supported until around June 2021--or later, if 2045 0.4.5.x is later than anticipated. 2046 2047 Note also that support for 0.4.2.x has just ended; support for 0.4.3 2048 will continue until Feb 15, 2021. We still plan to continue supporting 2049 0.3.5.x, our long-term stable series, until Feb 2022. 2050 2051 Below are the changes since 0.4.4.4-rc. For a complete list of changes 2052 since 0.4.3.6, see the ReleaseNotes file. 2053 2054 o Major bugfixes (onion services, DoS): 2055 - Correct handling of parameters for the onion service DoS defense. 2056 Previously, the consensus parameters for the onion service DoS 2057 defenses were overwriting the parameters set by the service 2058 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug 2059 40109; bugfix on 0.4.2.1-alpha. 2060 2061 o Major bugfixes (stats, onion services): 2062 - Fix a bug where we were undercounting the Tor network's total 2063 onion service traffic, by ignoring any traffic originating from 2064 clients. Now we count traffic from both clients and services. 2065 Fixes bug 40117; bugfix on 0.2.6.2-alpha. 2066 2067 o Minor features (control port): 2068 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an 2069 onion service, display it when we use ONION_CLIENT_AUTH_VIEW. 2070 Closes ticket 40089. Patch by Neel Chauhan. 2071 2072 o Minor features (denial-of-service memory limiter): 2073 - Allow the user to configure even lower values for the 2074 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB, 2075 when previously the minimum was 256 MB. On clients, there is no 2076 minimum. Relays and clients will both warn if the value is set so 2077 low that Tor is likely to stop working. Closes ticket 24308. 2078 2079 o Minor features (tests): 2080 - Our "make check" target now runs the unit tests in 8 parallel 2081 chunks. Doing this speeds up hardened CI builds by more than a 2082 factor of two. Closes ticket 40098. 2083 2084 o Minor bugfixes (guard selection algorithm): 2085 - Avoid needless guard-related warning when upgrading from 0.4.3 to 2086 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha. 2087 2088 o Minor bugfixes (tests): 2089 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run 2090 on its own. Previously, it would exit with an error. Fixes bug 2091 40099; bugfix on 0.2.8.1-alpha. 2092 2093 2094Changes in version 0.4.4.3-alpha - 2020-07-27 2095 Tor 0.4.4.3-alpha fixes several annoyances in previous versions, 2096 including one affecting NSS users, and several affecting the Linux 2097 seccomp2 sandbox. 2098 2099 o Major features (fallback directory list): 2100 - Replace the 148 fallback directories originally included in Tor 2101 0.4.1.4-rc (of which around 105 are still functional) with a list 2102 of 144 fallbacks generated in July 2020. Closes ticket 40061. 2103 2104 o Major bugfixes (NSS): 2105 - When running with NSS enabled, make sure that NSS knows to expect 2106 nonblocking sockets. Previously, we set our TCP sockets as 2107 nonblocking, but did not tell NSS, which in turn could lead to 2108 unexpected blocking behavior. Fixes bug 40035; bugfix 2109 on 0.3.5.1-alpha. 2110 2111 o Minor bugfixes (linux seccomp2 sandbox): 2112 - Fix a regression on sandboxing rules for the openat() syscall. The 2113 fix for bug 25440 fixed the problem on systems with glibc >= 2.27 2114 but broke with versions of glibc. We now choose a rule based on 2115 the glibc version. Patch from Daniel Pinto. Fixes bug 27315; 2116 bugfix on 0.3.5.11. 2117 - Makes the seccomp sandbox allow the correct syscall for opendir 2118 according to the running glibc version. This fixes crashes when 2119 reloading torrc with sandbox enabled when running on glibc 2.15 to 2120 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix 2121 on 0.3.5.11. 2122 2123 o Minor bugfixes (relay, usability): 2124 - Adjust the rules for when to warn about having too many 2125 connections to other relays. Previously we'd tolerate up to 1.5 2126 connections per relay on average. Now we tolerate more connections 2127 for directory authorities, and raise the number of total 2128 connections we need to see before we warn. Fixes bug 33880; bugfix 2129 on 0.3.1.1-alpha. 2130 2131 o Documentation: 2132 - Replace most http:// URLs in our code and documentation with 2133 https:// URLs. (We have left unchanged the code in src/ext/, and 2134 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand. 2135 2136 o Removed features: 2137 - Our "check-local" test target no longer tries to use the 2138 Coccinelle semantic patching tool parse all the C files. While it 2139 is a good idea to try to make sure Coccinelle works on our C 2140 before we run a Coccinelle patch, doing so on every test run has 2141 proven to be disruptive. You can still run this tool manually with 2142 "make check-cocci". Closes ticket 40030. 2143 2144 2145Changes in version 0.3.5.11 - 2020-07-09 2146 Tor 0.3.5.11 backports fixes from later tor releases, including several 2147 usability, portability, and reliability fixes. 2148 2149 This release also fixes TROVE-2020-001, a medium-severity denial of 2150 service vulnerability affecting all versions of Tor when compiled with 2151 the NSS encryption library. (This is not the default configuration.) 2152 Using this vulnerability, an attacker could cause an affected Tor 2153 instance to crash remotely. This issue is also tracked as CVE-2020- 2154 15572. Anybody running a version of Tor built with the NSS library 2155 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha 2156 or later. 2157 2158 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha): 2159 - Fix a crash due to an out-of-bound memory access when Tor is 2160 compiled with NSS support. Fixes bug 33119; bugfix on 2161 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 2162 and CVE-2020-15572. 2163 2164 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc): 2165 - Fix a bug that was preventing DoS defenses from running on bridges 2166 with a pluggable transport. Previously, the DoS subsystem was not 2167 given the transport name of the client connection, thus failed to 2168 find the GeoIP cache entry for that client address. Fixes bug 2169 33491; bugfix on 0.3.3.2-alpha. 2170 2171 o Minor features (testing, backport from 0.4.3.4-rc): 2172 - The unit tests now support a "TOR_SKIP_TESTCASES" environment 2173 variable to specify a list of space-separated test cases that 2174 should not be executed. We will use this to disable certain tests 2175 that are failing on Appveyor because of mismatched OpenSSL 2176 libraries. Part of ticket 33643. 2177 2178 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha): 2179 - Use the correct 64-bit printf format when compiling with MINGW on 2180 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha. 2181 2182 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha): 2183 - Warn if the ContactInfo field is not set, and tell the relay 2184 operator that not having a ContactInfo field set might cause their 2185 relay to get rejected in the future. Fixes bug 33361; bugfix 2186 on 0.1.1.10-alpha. 2187 2188 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha): 2189 - Resume use of preemptively-built circuits when UseEntryGuards is set 2190 to 0. We accidentally disabled this feature with that config 2191 setting, leading to slower load times. Fixes bug 34303; bugfix 2192 on 0.3.3.2-alpha. 2193 2194 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5): 2195 - Avoid compiler warnings from Clang 10 related to the use of GCC- 2196 style "/* falls through */" comments. Both Clang and GCC allow 2197 __attribute__((fallthrough)) instead, so that's what we're using 2198 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha. 2199 2200 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha): 2201 - Fix a compiler warning on platforms with 32-bit time_t values. 2202 Fixes bug 40028; bugfix on 0.3.2.8-rc. 2203 2204 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha): 2205 - When starting Tor any time after the first time in a process, 2206 register the thread in which it is running as the main thread. 2207 Previously, we only did this on Windows, which could lead to bugs 2208 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix 2209 on 0.3.3.1-alpha. 2210 2211 o Minor bugfixes (key portability, backport from 0.4.3.4-rc): 2212 - When reading PEM-encoded key data, tolerate CRLF line-endings even 2213 if we are not running on Windows. Previously, non-Windows hosts 2214 would reject these line-endings in certain positions, making 2215 certain key files hard to move from one host to another. Fixes bug 2216 33032; bugfix on 0.3.5.1-alpha. 2217 2218 o Minor bugfixes (logging, backport from 0.4.4.2-alpha): 2219 - Downgrade a noisy log message that could occur naturally when 2220 receiving an extrainfo document that we no longer want. Fixes bug 2221 16016; bugfix on 0.2.6.3-alpha. 2222 2223 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha): 2224 - Remove a BUG() warning that would cause a stack trace if an onion 2225 service descriptor was freed while we were waiting for a 2226 rendezvous circuit to complete. Fixes bug 28992; bugfix 2227 on 0.3.2.1-alpha. 2228 2229 o Testing (CI, backport from 0.4.3.4-rc): 2230 - In our Appveyor Windows CI, copy required DLLs to test and app 2231 directories, before running tor's tests. This ensures that tor.exe 2232 and test*.exe use the correct version of each DLL. This fix is not 2233 required, but we hope it will avoid DLL search issues in future. 2234 Fixes bug 33673; bugfix on 0.3.4.2-alpha. 2235 - On Appveyor, skip the crypto/openssl_version test, which is 2236 failing because of a mismatched library installation. Fix 2237 for 33643. 2238 2239 2240Changes in version 0.4.2.8 - 2020-07-09 2241 Tor 0.4.2.8 backports various fixes from later releases, including 2242 several that affect usability and portability. 2243 2244 This release also fixes TROVE-2020-001, a medium-severity denial of 2245 service vulnerability affecting all versions of Tor when compiled with 2246 the NSS encryption library. (This is not the default configuration.) 2247 Using this vulnerability, an attacker could cause an affected Tor 2248 instance to crash remotely. This issue is also tracked as CVE-2020- 2249 15572. Anybody running a version of Tor built with the NSS library 2250 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha 2251 or later. 2252 2253 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha): 2254 - Fix a crash due to an out-of-bound memory access when Tor is 2255 compiled with NSS support. Fixes bug 33119; bugfix on 2256 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 2257 and CVE-2020-15572. 2258 2259 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc): 2260 - Fix a bug that was preventing DoS defenses from running on bridges 2261 with a pluggable transport. Previously, the DoS subsystem was not 2262 given the transport name of the client connection, thus failed to 2263 find the GeoIP cache entry for that client address. Fixes bug 2264 33491; bugfix on 0.3.3.2-alpha. 2265 2266 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc): 2267 - Default to sending SENDME version 1 cells. (Clients are already 2268 sending these, because of a consensus parameter telling them to do 2269 so: this change only affects what clients would do if the 2270 consensus didn't contain a recommendation.) Closes ticket 33623. 2271 2272 o Minor features (diagnostic, backport from 0.4.3.3-alpha): 2273 - Improve assertions and add some memory-poisoning code to try to 2274 track down possible causes of a rare crash (32564) in the EWMA 2275 code. Closes ticket 33290. 2276 2277 o Minor features (testing, backport from 0.4.3.4-rc): 2278 - The unit tests now support a "TOR_SKIP_TESTCASES" environment 2279 variable to specify a list of space-separated test cases that 2280 should not be executed. We will use this to disable certain tests 2281 that are failing on Appveyor because of mismatched OpenSSL 2282 libraries. Part of ticket 33643. 2283 2284 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha): 2285 - Use the correct 64-bit printf format when compiling with MINGW on 2286 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha. 2287 2288 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha): 2289 - Warn if the ContactInfo field is not set, and tell the relay 2290 operator that not having a ContactInfo field set might cause their 2291 relay to get rejected in the future. Fixes bug 33361; bugfix 2292 on 0.1.1.10-alpha. 2293 2294 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha): 2295 - Resume use of preemptively-built circuits when UseEntryGuards is set 2296 to 0. We accidentally disabled this feature with that config 2297 setting, leading to slower load times. Fixes bug 34303; bugfix 2298 on 0.3.3.2-alpha. 2299 2300 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5): 2301 - Avoid compiler warnings from Clang 10 related to the use of GCC- 2302 style "/* falls through */" comments. Both Clang and GCC allow 2303 __attribute__((fallthrough)) instead, so that's what we're using 2304 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha. 2305 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix 2306 on 0.4.0.3-alpha. 2307 2308 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha): 2309 - Fix a compiler warning on platforms with 32-bit time_t values. 2310 Fixes bug 40028; bugfix on 0.3.2.8-rc. 2311 2312 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha): 2313 - When receiving "ACTIVE" or "DORMANT" signals on the control port, 2314 report them as SIGNAL events. Previously we would log a bug 2315 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha. 2316 2317 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha): 2318 - When starting Tor any time after the first time in a process, 2319 register the thread in which it is running as the main thread. 2320 Previously, we only did this on Windows, which could lead to bugs 2321 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix 2322 on 0.3.3.1-alpha. 2323 2324 o Minor bugfixes (key portability, backport from 0.4.3.4-rc): 2325 - When reading PEM-encoded key data, tolerate CRLF line-endings even 2326 if we are not running on Windows. Previously, non-Windows hosts 2327 would reject these line-endings in certain positions, making 2328 certain key files hard to move from one host to another. Fixes bug 2329 33032; bugfix on 0.3.5.1-alpha. 2330 2331 o Minor bugfixes (logging, backport from 0.4.3.2-rc): 2332 - When logging a bug, do not say "Future instances of this warning 2333 will be silenced" unless we are actually going to silence them. 2334 Previously we would say this whenever a BUG() check failed in the 2335 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha. 2336 2337 o Minor bugfixes (logging, backport from 0.4.3.4-rc): 2338 - Flush stderr, stdout, and file logs during shutdown, if supported 2339 by the OS. This change helps make sure that any final logs are 2340 recorded. Fixes bug 33087; bugfix on 0.4.1.6. 2341 2342 o Minor bugfixes (logging, backport from 0.4.4.2-alpha): 2343 - Downgrade a noisy log message that could occur naturally when 2344 receiving an extrainfo document that we no longer want. Fixes bug 2345 16016; bugfix on 0.2.6.3-alpha. 2346 2347 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha): 2348 - Remove a BUG() warning that would cause a stack trace if an onion 2349 service descriptor was freed while we were waiting for a 2350 rendezvous circuit to complete. Fixes bug 28992; bugfix 2351 on 0.3.2.1-alpha. 2352 2353 o Testing (CI, backport from 0.4.3.4-rc): 2354 - In our Appveyor Windows CI, copy required DLLs to test and app 2355 directories, before running tor's tests. This ensures that tor.exe 2356 and test*.exe use the correct version of each DLL. This fix is not 2357 required, but we hope it will avoid DLL search issues in future. 2358 Fixes bug 33673; bugfix on 0.3.4.2-alpha. 2359 - On Appveyor, skip the crypto/openssl_version test, which is 2360 failing because of a mismatched library installation. Fix 2361 for 33643. 2362 2363 2364Changes in version 0.4.3.6 - 2020-07-09 2365 Tor 0.4.3.6 backports several bugfixes from later releases, including 2366 some affecting usability. 2367 2368 This release also fixes TROVE-2020-001, a medium-severity denial of 2369 service vulnerability affecting all versions of Tor when compiled with 2370 the NSS encryption library. (This is not the default configuration.) 2371 Using this vulnerability, an attacker could cause an affected Tor 2372 instance to crash remotely. This issue is also tracked as CVE-2020- 2373 15572. Anybody running a version of Tor built with the NSS library 2374 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha 2375 or later. 2376 2377 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha): 2378 - Fix a crash due to an out-of-bound memory access when Tor is 2379 compiled with NSS support. Fixes bug 33119; bugfix on 2380 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 2381 and CVE-2020-15572. 2382 2383 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha): 2384 - Use the correct 64-bit printf format when compiling with MINGW on 2385 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha. 2386 2387 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha): 2388 - Resume use of preemptively-built circuits when UseEntryGuards is set 2389 to 0. We accidentally disabled this feature with that config 2390 setting, leading to slower load times. Fixes bug 34303; bugfix 2391 on 0.3.3.2-alpha. 2392 2393 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha): 2394 - Fix a compiler warning on platforms with 32-bit time_t values. 2395 Fixes bug 40028; bugfix on 0.3.2.8-rc. 2396 2397 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha): 2398 - Fix a startup crash when tor is compiled with --enable-nss and 2399 sandbox support is enabled. Fixes bug 34130; bugfix on 2400 0.3.5.1-alpha. Patch by Daniel Pinto. 2401 2402 o Minor bugfixes (logging, backport from 0.4.4.2-alpha): 2403 - Downgrade a noisy log message that could occur naturally when 2404 receiving an extrainfo document that we no longer want. Fixes bug 2405 16016; bugfix on 0.2.6.3-alpha. 2406 2407 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha): 2408 - Update the man page to reflect that MinUptimeHidServDirectoryV2 2409 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha. 2410 2411 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha): 2412 - Prevent an assert() that would occur when cleaning the client 2413 descriptor cache, and attempting to close circuits for a non- 2414 decrypted descriptor (lacking client authorization). Fixes bug 2415 33458; bugfix on 0.4.2.1-alpha. 2416 2417 o Minor bugfixes (portability, backport from 0.4.4.1-alpha): 2418 - Fix a portability error in the configure script, where we were 2419 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5. 2420 2421 o Minor bugfixes (relays, backport from 0.4.4.1-alpha): 2422 - Stop advertising incorrect IPv6 ORPorts in relay and bridge 2423 descriptors, when the IPv6 port was configured as "auto". Fixes 2424 bug 32588; bugfix on 0.2.3.9-alpha. 2425 2426 o Documentation (backport from 0.4.4.1-alpha): 2427 - Fix several doxygen warnings related to imbalanced groups. Closes 2428 ticket 34255. 2429 2430 2431Changes in version 0.4.4.2-alpha - 2020-07-09 2432 This is the second alpha release in the 0.4.4.x series. It fixes a few 2433 bugs in the previous release, and solves a few usability, 2434 compatibility, and portability issues. 2435 2436 This release also fixes TROVE-2020-001, a medium-severity denial of 2437 service vulnerability affecting all versions of Tor when compiled with 2438 the NSS encryption library. (This is not the default configuration.) 2439 Using this vulnerability, an attacker could cause an affected Tor 2440 instance to crash remotely. This issue is also tracked as CVE-2020- 2441 15572. Anybody running a version of Tor built with the NSS library 2442 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha 2443 or later. 2444 2445 o Major bugfixes (NSS, security): 2446 - Fix a crash due to an out-of-bound memory access when Tor is 2447 compiled with NSS support. Fixes bug 33119; bugfix on 2448 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001 2449 and CVE-2020-15572. 2450 2451 o Minor features (bootstrap reporting): 2452 - Report more detailed reasons for bootstrap failure when the 2453 failure happens due to a TLS error. Previously we would just call 2454 these errors "MISC" when they happened during read, and "DONE" 2455 when they happened during any other TLS operation. Closes 2456 ticket 32622. 2457 2458 o Minor features (directory authority): 2459 - Authorities now recommend the protocol versions that are supported 2460 by Tor 0.3.5 and later. (Earlier versions of Tor have been 2461 deprecated since January of this year.) This recommendation will 2462 cause older clients and relays to give a warning on startup, or 2463 when they download a consensus directory. Closes ticket 32696. 2464 2465 o Minor features (entry guards): 2466 - Reinstate support for GUARD NEW/UP/DOWN control port events. 2467 Closes ticket 40001. 2468 2469 o Minor features (linux seccomp2 sandbox, portability): 2470 - Allow Tor to build on platforms where it doesn't know how to 2471 report which syscall caused the linux seccomp2 sandbox to fail. 2472 This change should make the sandbox code more portable to less 2473 common Linux architectures. Closes ticket 34382. 2474 - Permit the unlinkat() syscall, which some Libc implementations use 2475 to implement unlink(). Closes ticket 33346. 2476 2477 o Minor bugfix (CI, Windows): 2478 - Use the correct 64-bit printf format when compiling with MINGW on 2479 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha. 2480 2481 o Minor bugfix (onion service v3 client): 2482 - Remove a BUG() warning that could occur naturally. Fixes bug 2483 34087; bugfix on 0.3.2.1-alpha. 2484 2485 o Minor bugfix (SOCKS, onion service client): 2486 - Detect v3 onion service addresses of the wrong length when 2487 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix 2488 on 0.4.3.1-alpha. 2489 2490 o Minor bugfixes (compiler warnings): 2491 - Fix a compiler warning on platforms with 32-bit time_t values. 2492 Fixes bug 40028; bugfix on 0.3.2.8-rc. 2493 2494 o Minor bugfixes (control port, onion service): 2495 - Consistently use 'address' in "Invalid v3 address" response to 2496 ONION_CLIENT_AUTH commands. Previously, we would sometimes say 2497 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha. 2498 2499 o Minor bugfixes (logging): 2500 - Downgrade a noisy log message that could occur naturally when 2501 receiving an extrainfo document that we no longer want. Fixes bug 2502 16016; bugfix on 0.2.6.3-alpha. 2503 2504 o Minor bugfixes (onion services v3): 2505 - Avoid a non-fatal assertion failure in certain edge-cases when 2506 opening an intro circuit as a client. Fixes bug 34084; bugfix 2507 on 0.3.2.1-alpha. 2508 2509 o Deprecated features (onion service v2): 2510 - Add a deprecation warning for version 2 onion services. Closes 2511 ticket 40003. 2512 2513 o Removed features (IPv6, revert): 2514 - Revert the change in the default value of ClientPreferIPv6OrPort: 2515 it breaks the torsocks use case. The SOCKS resolve command has no 2516 mechanism to ask for a specific address family (v4 or v6), and so 2517 prioritizing IPv6 when an IPv4 address is requested on the SOCKS 2518 interface resulted in a failure. Tor Browser explicitly sets 2519 PreferIPv6, so this should not affect the majority of our users. 2520 Closes ticket 33796; bugfix on 0.4.4.1-alpha. 2521 2522 2523Changes in version 0.4.4.1-alpha - 2020-06-16 2524 This is the first alpha release in the 0.4.4.x series. It improves 2525 our guard selection algorithms, improves the amount of code that 2526 can be disabled when running without relay support, and includes numerous 2527 small bugfixes and enhancements. It also lays the ground for some IPv6 2528 features that we'll be developing more in the next (0.4.5) series. 2529 2530 Here are the changes since 0.4.3.5. 2531 2532 o Major features (Proposal 310, performance + security): 2533 - Implements Proposal 310, "Bandaid on guard selection". Proposal 2534 310 solves load-balancing issues with older versions of the guard 2535 selection algorithm, and improves its security. Under this new 2536 algorithm, a newly selected guard never becomes Primary unless all 2537 previously sampled guards are unreachable. Implements 2538 recommendation from 32088. (Proposal 310 is linked to the CLAPS 2539 project researching optimal client location-aware path selections. 2540 This project is a collaboration between the UCLouvain Crypto Group, 2541 the U.S. Naval Research Laboratory, and Princeton University.) 2542 2543 o Major features (IPv6, relay): 2544 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol 2545 warning if the IPv4 or IPv6 address is an internal address, and 2546 internal addresses are not allowed. But continue to use the other 2547 address, if it is valid. Closes ticket 33817. 2548 - If a relay can extend over IPv4 and IPv6, and both addresses are 2549 provided, it chooses between them uniformly at random. Closes 2550 ticket 33817. 2551 - Re-use existing IPv6 connections for circuit extends. Closes 2552 ticket 33817. 2553 - Relays may extend circuits over IPv6, if the relay has an IPv6 2554 ORPort, and the client supplies the other relay's IPv6 ORPort in 2555 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6 2556 ORPort self-tests in 33222. Closes ticket 33817. 2557 2558 o Major features (v3 onion services): 2559 - Allow v3 onion services to act as OnionBalance backend instances, 2560 by using the HiddenServiceOnionBalanceInstance torrc option. 2561 Closes ticket 32709. 2562 2563 o Minor feature (developer tools): 2564 - Add a script to help check the alphabetical ordering of option 2565 names in the manual page. Closes ticket 33339. 2566 2567 o Minor feature (onion service client, SOCKS5): 2568 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back 2569 new type of onion service connection failures. The semantics of 2570 these error codes are documented in proposal 309. Closes 2571 ticket 32542. 2572 2573 o Minor feature (onion service v3): 2574 - If a service cannot upload its descriptor(s), log why at INFO 2575 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha. 2576 2577 o Minor feature (python scripts): 2578 - Stop assuming that /usr/bin/python exists. Instead of using a 2579 hardcoded path in scripts that still use Python 2, use 2580 /usr/bin/env, similarly to the scripts that use Python 3. Fixes 2581 bug 33192; bugfix on 0.4.2. 2582 2583 o Minor features (client-only compilation): 2584 - Disable more code related to the ext_orport protocol when 2585 compiling without support for relay mode. Closes ticket 33368. 2586 - Disable more of our self-testing code when support for relay mode 2587 is disabled. Closes ticket 33370. 2588 2589 o Minor features (code safety): 2590 - Check for failures of tor_inet_ntop() and tor_inet_ntoa() 2591 functions in DNS and IP address processing code, and adjust 2592 codepaths to make them less likely to crash entire Tor instances. 2593 Resolves issue 33788. 2594 2595 o Minor features (compilation size): 2596 - Most server-side DNS code is now disabled when building without 2597 support for relay mode. Closes ticket 33366. 2598 2599 o Minor features (continuous integration): 2600 - Run unit-test and integration test (Stem, Chutney) jobs with 2601 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor. 2602 Resolves ticket 32143. 2603 2604 o Minor features (control port): 2605 - Return a descriptive error message from the 'GETINFO status/fresh- 2606 relay-descs' command on the control port. Previously, we returned 2607 a generic error of "Error generating descriptor". Closes ticket 2608 32873. Patch by Neel Chauhan. 2609 2610 o Minor features (developer tooling): 2611 - Refrain from listing all .a files that are generated by the Tor 2612 build in .gitignore. Add a single wildcard *.a entry that covers 2613 all of them for present and future. Closes ticket 33642. 2614 - Add a script ("git-install-tools.sh") to install git hooks and 2615 helper scripts. Closes ticket 33451. 2616 2617 o Minor features (directory authority, shared random): 2618 - Refactor more authority-only parts of the shared-random scheduling 2619 code to reside in the dirauth module, and to be disabled when 2620 compiling with --disable-module-dirauth. Closes ticket 33436. 2621 2622 o Minor features (directory): 2623 - Remember the number of bytes we have downloaded for each directory 2624 purpose while bootstrapping, and while fully bootstrapped. Log 2625 this information as part of the heartbeat message. Closes 2626 ticket 32720. 2627 2628 o Minor features (IPv6 support): 2629 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above 2630 changes and tor_addr_is_null(). Closes ticket 33679. Patch 2631 by MrSquanchee. 2632 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2 2633 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays. 2634 Closes ticket 33901. 2635 2636 o Minor features (logging): 2637 - When trying to find our own address, add debug-level logging to 2638 report the sources of candidate addresses. Closes ticket 32888. 2639 2640 o Minor features (testing, architecture): 2641 - Our test scripts now double-check that subsystem initialization 2642 order is consistent with the inter-module dependencies established 2643 by our .may_include files. Implements ticket 31634. 2644 - Initialize all subsystems at the beginning of our unit test 2645 harness, to avoid crashes due to uninitialized subsystems. Follow- 2646 up from ticket 33316. 2647 2648 o Minor features (v3 onion services): 2649 - Add v3 onion service status to the dumpstats() call which is 2650 triggered by a SIGUSR1 signal. Previously, we only did v2 onion 2651 services. Closes ticket 24844. Patch by Neel Chauhan. 2652 2653 o Minor features (windows): 2654 - Add support for console control signals like Ctrl+C in Windows. 2655 Closes ticket 34211. Patch from Damon Harris (TheDcoder). 2656 2657 o Minor bugfix (onion service v3): 2658 - Prevent an assert() that would occur when cleaning the client 2659 descriptor cache, and attempting to close circuits for a non- 2660 decrypted descriptor (lacking client authorization). Fixes bug 2661 33458; bugfix on 0.4.2.1-alpha. 2662 2663 o Minor bugfix (refactoring): 2664 - Lift circuit_build_times_disabled() out of the 2665 circuit_expire_building() loop, to save CPU time when there are 2666 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9. 2667 2668 o Minor bugfixes (client performance): 2669 - Resume use of preemptively-built circuits when UseEntryGuards is set 2670 to 0. We accidentally disabled this feature with that config 2671 setting, leading to slower load times. Fixes bug 34303; bugfix 2672 on 0.3.3.2-alpha. 2673 2674 o Minor bugfixes (directory authorities): 2675 - Directory authorities now reject votes that arrive too late. In 2676 particular, once an authority has started fetching missing votes, 2677 it no longer accepts new votes posted by other authorities. This 2678 change helps prevent a consensus split, where only some authorities 2679 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha. 2680 2681 o Minor bugfixes (git scripts): 2682 - Stop executing the checked-out pre-commit hook from the pre-push 2683 hook. Instead, execute the copy in the user's git directory. Fixes 2684 bug 33284; bugfix on 0.4.1.1-alpha. 2685 2686 o Minor bugfixes (initialization): 2687 - Initialize the subsystems in our code in an order more closely 2688 corresponding to their dependencies, so that every system is 2689 initialized before the ones that (theoretically) depend on it. 2690 Fixes bug 33316; bugfix on 0.4.0.1-alpha. 2691 2692 o Minor bugfixes (IPv4, relay): 2693 - Check for invalid zero IPv4 addresses and ports when sending and 2694 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha. 2695 2696 o Minor bugfixes (IPv6, relay): 2697 - Consider IPv6 addresses when checking if a connection is 2698 canonical. In 17604, relays assumed that a remote relay could 2699 consider an IPv6 connection canonical, but did not set the 2700 canonical flag on their side of the connection. Fixes bug 33899; 2701 bugfix on 0.3.1.1-alpha. 2702 - Log IPv6 addresses on connections where this relay is the 2703 responder. Previously, responding relays would replace the remote 2704 IPv6 address with the IPv4 address from the consensus. Fixes bug 2705 33899; bugfix on 0.3.1.1-alpha. 2706 2707 o Minor bugfixes (linux seccomp sandbox nss): 2708 - Fix a startup crash when tor is compiled with --enable-nss and 2709 sandbox support is enabled. Fixes bug 34130; bugfix on 2710 0.3.5.1-alpha. Patch by Daniel Pinto. 2711 2712 o Minor bugfixes (logging, testing): 2713 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL 2714 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE() 2715 used to log a non-fatal warning, regardless of the debugging 2716 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha. 2717 2718 o Minor bugfixes (logs): 2719 - Remove surprising empty line in the INFO-level log about circuit 2720 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha. 2721 2722 o Minor bugfixes (mainloop): 2723 - Better guard against growing a buffer past its maximum 2GB in 2724 size. Fixes bug 33131; bugfix on 0.3.0.4-rc. 2725 2726 o Minor bugfixes (manual page): 2727 - Update the man page to reflect that MinUptimeHidServDirectoryV2 2728 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha. 2729 2730 o Minor bugfixes (onion service v3, client): 2731 - Remove a BUG() that was causing a stacktrace when a descriptor 2732 changed at an unexpected time. Fixes bug 28992; bugfix 2733 on 0.3.2.1-alpha. 2734 2735 o Minor bugfixes (onion service, logging): 2736 - Fix a typo in a log message PublishHidServDescriptors is set to 0. 2737 Fixes bug 33779; bugfix on 0.3.2.1-alpha. 2738 2739 o Minor bugfixes (portability): 2740 - Fix a portability error in the configure script, where we were 2741 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5. 2742 2743 o Minor bugfixes (protocol versions): 2744 - Sort tor's supported protocol version lists, as recommended by the 2745 tor directory specification. Fixes bug 33285; bugfix 2746 on 0.4.0.1-alpha. 2747 2748 o Minor bugfixes (relays): 2749 - Stop advertising incorrect IPv6 ORPorts in relay and bridge 2750 descriptors, when the IPv6 port was configured as "auto". Fixes 2751 bug 32588; bugfix on 0.2.3.9-alpha. 2752 2753 o Code simplification and refactoring: 2754 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like 2755 TOR_ADDR_BUF_LEN but includes enough space for an IP address, 2756 brackets, separating colon, and port number. Closes ticket 33956. 2757 Patch by Neel Chauhan. 2758 - Merge the orconn and ocirc events into the "core" subsystem, which 2759 manages or connections and origin circuits. Previously they were 2760 isolated in subsystems of their own. 2761 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency 2762 inversion. Closes ticket 33633. 2763 - Move the circuit extend code to the relay module. Split the 2764 circuit extend function into smaller functions. Closes 2765 ticket 33633. 2766 - Rewrite port_parse_config() to use the default port flags from 2767 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee. 2768 - Updated comments in 'scheduler.c' to reflect old code changes, and 2769 simplified the scheduler channel state change code. Closes 2770 ticket 33349. 2771 2772 o Documentation: 2773 - Document the limitations of using %include on config files with 2774 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on 2775 0.3.1.1-alpha. Patch by Daniel Pinto. 2776 - Fix several doxygen warnings related to imbalanced groups. Closes 2777 ticket 34255. 2778 2779 o Removed features: 2780 - Remove the ClientAutoIPv6ORPort option. This option attempted to 2781 randomly choose between IPv4 and IPv6 for client connections, and 2782 wasn't a true implementation of Happy Eyeballs. Often, this option 2783 failed on IPv4-only or IPv6-only connections. Closes ticket 32905. 2784 Patch by Neel Chauhan. 2785 - Stop shipping contrib/dist/rc.subr file, as it is not being used 2786 on FreeBSD anymore. Closes issue 31576. 2787 2788 o Testing: 2789 - Add a basic IPv6 test to "make test-network". This test only runs 2790 when the local machine has an IPv6 stack. Closes ticket 33300. 2791 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile. 2792 These jobs run the IPv4-only and dual-stack chutney flavours from 2793 test-network-all. Closes ticket 33280. 2794 - Remove a redundant distcheck job. Closes ticket 33194. 2795 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6 2796 chutney job. This job runs on macOS, so it's a bit slow. Closes 2797 ticket 33303. 2798 - Sort the Travis jobs in order of speed. Putting the slowest jobs 2799 first takes full advantage of Travis job concurrency. Closes 2800 ticket 33194. 2801 - Stop allowing the Chutney IPv6 Travis job to fail. This job was 2802 previously configured to fast_finish (which requires 2803 allow_failure), to speed up the build. Closes ticket 33195. 2804 - Test v3 onion services to tor's mixed IPv4 chutney network. And 2805 add a mixed IPv6 chutney network. These networks are used in the 2806 test-network-all, test-network-ipv4, and test-network-ipv6 make 2807 targets. Closes ticket 33334. 2808 - Use the "bridges+hs-v23" chutney network flavour in "make test- 2809 network". This test requires a recent version of chutney (mid- 2810 February 2020). Closes ticket 28208. 2811 - When a Travis chutney job fails, use chutney's new "diagnostics.sh" 2812 tool to produce detailed diagnostic output. Closes ticket 32792. 2813 2814 o Code simplification and refactoring (onion service): 2815 - Refactor configuration parsing to use the new config subsystem 2816 code. Closes ticket 33014. 2817 2818 o Code simplification and refactoring (relay address): 2819 - Move a series of functions related to address resolving into their 2820 own files. Closes ticket 33789. 2821 2822 o Documentation (manual page): 2823 - Add cross reference links and a table of contents to the HTML tor 2824 manual page. Closes ticket 33369. Work by Swati Thacker as part of 2825 Google Season of Docs. 2826 - Alphabetize the Denial of Service Mitigation Options, Directory 2827 Authority Server Options, Hidden Service Options, and Testing 2828 Network Options sections of the tor(1) manual page. Closes ticket 2829 33275. Work by Swati Thacker as part of Google Season of Docs. 2830 - Refrain from mentioning nicknames in manpage section for MyFamily 2831 torrc option. Resolves issue 33417. 2832 - Updated the options set by TestingTorNetwork in the manual page. 2833 Closes ticket 33778. 2834 2835 2836Changes in version 0.4.3.5 - 2020-05-15 2837 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This 2838 series adds support for building without relay code enabled, and 2839 implements functionality needed for OnionBalance with v3 onion 2840 services. It includes significant refactoring of our configuration and 2841 controller functionality, and fixes numerous smaller bugs and 2842 performance issues. 2843 2844 Per our support policy, we support each stable release series for nine 2845 months after its first stable release, or three months after the first 2846 stable release of the next series: whichever is longer. This means 2847 that 0.4.3.x will be supported until around February 2021--later, if 2848 0.4.4.x is later than anticipated. 2849 2850 Note also that support for 0.4.1.x is about to end on May 20 of this 2851 year; 0.4.2.x will be supported until September 15. We still plan to 2852 continue supporting 0.3.5.x, our long-term stable series, until 2853 Feb 2022. 2854 2855 Below are the changes since 0.4.3.4-rc. For a complete list of changes 2856 since 0.4.2.6, see the ReleaseNotes file. 2857 2858 o Minor bugfixes (compiler compatibility): 2859 - Avoid compiler warnings from Clang 10 related to the use of GCC- 2860 style "/* falls through */" comments. Both Clang and GCC allow 2861 __attribute__((fallthrough)) instead, so that's what we're using 2862 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha. 2863 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix 2864 on 0.4.0.3-alpha. 2865 2866 o Minor bugfixes (logging): 2867 - Stop truncating IPv6 addresses and ports in channel and connection 2868 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha. 2869 - Fix a logic error in a log message about whether an address was 2870 invalid. Previously, the code would never report that onion 2871 addresses were onion addresses. Fixes bug 34131; bugfix 2872 on 0.4.3.1-alpha. 2873 2874 2875Changes in version 0.4.3.4-rc - 2020-04-13 2876 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes 2877 several bugs from earlier versions, including one affecting DoS 2878 defenses on bridges using pluggable transports. 2879 2880 o Major bugfixes (DoS defenses, bridges, pluggable transport): 2881 - Fix a bug that was preventing DoS defenses from running on bridges 2882 with a pluggable transport. Previously, the DoS subsystem was not 2883 given the transport name of the client connection, thus failed to 2884 find the GeoIP cache entry for that client address. Fixes bug 2885 33491; bugfix on 0.3.3.2-alpha. 2886 2887 o Minor feature (sendme, flow control): 2888 - Default to sending SENDME version 1 cells. (Clients are already 2889 sending these, because of a consensus parameter telling them to do 2890 so: this change only affects what clients would do if the 2891 consensus didn't contain a recommendation.) Closes ticket 33623. 2892 2893 o Minor features (testing): 2894 - The unit tests now support a "TOR_SKIP_TESTCASES" environment 2895 variable to specify a list of space-separated test cases that 2896 should not be executed. We will use this to disable certain tests 2897 that are failing on Appveyor because of mismatched OpenSSL 2898 libraries. Part of ticket 33643. 2899 2900 o Minor bugfixes (--disable-module-relay): 2901 - Fix an assertion failure when Tor is built without the relay 2902 module, and then invoked with the "User" option. Fixes bug 33668; 2903 bugfix on 0.4.3.1-alpha. 2904 2905 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth): 2906 - Set some output arguments in the relay and dirauth module stubs, 2907 to guard against future stub argument handling bugs like 33668. 2908 Fixes bug 33674; bugfix on 0.4.3.1-alpha. 2909 2910 o Minor bugfixes (build system): 2911 - Correctly output the enabled module in the configure summary. 2912 Before that, the list shown was just plain wrong. Fixes bug 33646; 2913 bugfix on 0.4.3.2-alpha. 2914 2915 o Minor bugfixes (client, IPv6): 2916 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections. 2917 Instead, prefer IPv6 connections by default, but allow users to 2918 change their configs using the "NoPreferIPv6" port flag. Fixes bug 2919 33608; bugfix on 0.4.3.1-alpha. 2920 - Revert PreferIPv6 set by default on the SocksPort because it broke 2921 the torsocks use case. Tor doesn't have a way for an application 2922 to request the hostname to be resolved for a specific IP version, 2923 but torsocks requires that. Up until now, IPv4 was used by default 2924 so torsocks is expecting that, and can't handle a possible IPv6 2925 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha. 2926 2927 o Minor bugfixes (key portability): 2928 - When reading PEM-encoded key data, tolerate CRLF line-endings even 2929 if we are not running on Windows. Previously, non-Windows hosts 2930 would reject these line-endings in certain positions, making 2931 certain key files hard to move from one host to another. Fixes bug 2932 33032; bugfix on 0.3.5.1-alpha. 2933 2934 o Minor bugfixes (logging): 2935 - Flush stderr, stdout, and file logs during shutdown, if supported 2936 by the OS. This change helps make sure that any final logs are 2937 recorded. Fixes bug 33087; bugfix on 0.4.1.6. 2938 - Stop closing stderr and stdout during shutdown. Closing these file 2939 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix 2940 on 0.4.1.6. 2941 2942 o Minor bugfixes (onion services v3): 2943 - Relax severity of a log message that can appear naturally when 2944 decoding onion service descriptors as a relay. Also add some 2945 diagnostics to debug any future bugs in that area. Fixes bug 2946 31669; bugfix on 0.3.0.1-alpha. 2947 - Block a client-side assertion by disallowing the registration of 2948 an x25519 client auth key that's all zeroes. Fixes bug 33545; 2949 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks". 2950 2951 o Code simplification and refactoring: 2952 - Disable our coding standards best practices tracker in our git 2953 hooks. (0.4.3 branches only.) Closes ticket 33678. 2954 2955 o Testing: 2956 - Avoid conflicts between the fake sockets in tor's unit tests, and 2957 real file descriptors. Resolves issues running unit tests with 2958 GitHub Actions, where the process that embeds or launches the 2959 tests has already opened a large number of file descriptors. Fixes 2960 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by 2961 Putta Khunchalee. 2962 2963 o Testing (CI): 2964 - In our Appveyor Windows CI, copy required DLLs to test and app 2965 directories, before running tor's tests. This ensures that tor.exe 2966 and test*.exe use the correct version of each DLL. This fix is not 2967 required, but we hope it will avoid DLL search issues in future. 2968 Fixes bug 33673; bugfix on 0.3.4.2-alpha. 2969 - On Appveyor, skip the crypto/openssl_version test, which is 2970 failing because of a mismatched library installation. Fix 2971 for 33643. 2972 2973 2974Changes in version 0.4.3.3-alpha - 2020-03-18 2975 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including 2976 TROVE-2020-002, a major denial-of-service vulnerability that affected 2977 all released Tor instances since 0.2.1.5-alpha. Using this 2978 vulnerability, an attacker could cause Tor instances to consume a huge 2979 amount of CPU, disrupting their operations for several seconds or 2980 minutes. This attack could be launched by anybody against a relay, or 2981 by a directory cache against any client that had connected to it. The 2982 attacker could launch this attack as much as they wanted, thereby 2983 disrupting service or creating patterns that could aid in traffic 2984 analysis. This issue was found by OSS-Fuzz, and is also tracked 2985 as CVE-2020-10592. 2986 2987 We do not have reason to believe that this attack is currently being 2988 exploited in the wild, but nonetheless we advise everyone to upgrade 2989 as soon as packages are available. 2990 2991 o Major bugfixes (security, denial-of-service): 2992 - Fix a denial-of-service bug that could be used by anyone to 2993 consume a bunch of CPU on any Tor relay or authority, or by 2994 directories to consume a bunch of CPU on clients or hidden 2995 services. Because of the potential for CPU consumption to 2996 introduce observable timing patterns, we are treating this as a 2997 high-severity security issue. Fixes bug 33119; bugfix on 2998 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue 2999 as TROVE-2020-002 and CVE-2020-10592. 3000 3001 o Major bugfixes (circuit padding, memory leak): 3002 - Avoid a remotely triggered memory leak in the case that a circuit 3003 padding machine is somehow negotiated twice on the same circuit. 3004 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls. 3005 This is also tracked as TROVE-2020-004 and CVE-2020-10593. 3006 3007 o Major bugfixes (directory authority): 3008 - Directory authorities will now send a 503 (not enough bandwidth) 3009 code to clients when under bandwidth pressure. Known relays and 3010 other authorities will always be answered regardless of the 3011 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha. 3012 3013 o Minor features (diagnostic): 3014 - Improve assertions and add some memory-poisoning code to try to 3015 track down possible causes of a rare crash (32564) in the EWMA 3016 code. Closes ticket 33290. 3017 3018 o Minor features (directory authorities): 3019 - Directory authorities now reject descriptors from relays running 3020 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is 3021 still allowed. Resolves ticket 32672. Patch by Neel Chauhan. 3022 3023 o Minor features (usability): 3024 - Include more information when failing to parse a configuration 3025 value. This should make it easier to tell what's going wrong when 3026 a configuration file doesn't parse. Closes ticket 33460. 3027 3028 o Minor bugfix (relay, configuration): 3029 - Warn if the ContactInfo field is not set, and tell the relay 3030 operator that not having a ContactInfo field set might cause their 3031 relay to get rejected in the future. Fixes bug 33361; bugfix 3032 on 0.1.1.10-alpha. 3033 3034 o Minor bugfixes (coding best practices checks): 3035 - Allow the "practracker" script to read unicode files when using 3036 Python 2. We made the script use unicode literals in 0.4.3.1-alpha, 3037 but didn't change the codec for opening files. Fixes bug 33374; 3038 bugfix on 0.4.3.1-alpha. 3039 3040 o Minor bugfixes (continuous integration): 3041 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix 3042 on 0.3.2.2-alpha. 3043 3044 o Minor bugfixes (onion service v3, client): 3045 - Remove a BUG() warning that would cause a stack trace if an onion 3046 service descriptor was freed while we were waiting for a 3047 rendezvous circuit to complete. Fixes bug 28992; bugfix 3048 on 0.3.2.1-alpha. 3049 3050 o Minor bugfixes (onion services v3): 3051 - Fix an assertion failure that could result from a corrupted 3052 ADD_ONION control port command. Found by Saibato. Fixes bug 33137; 3053 bugfix on 0.3.3.1-alpha. This issue is also tracked 3054 as TROVE-2020-003. 3055 3056 o Documentation (manpage): 3057 - Alphabetize the Server and Directory server sections of the tor 3058 manpage. Also split Statistics options into their own section of 3059 the manpage. Closes ticket 33188. Work by Swati Thacker as part of 3060 Google Season of Docs. 3061 - Document the __OwningControllerProcess torrc option and specify 3062 its polling interval. Resolves issue 32971. 3063 3064 o Testing (Travis CI): 3065 - Remove a redundant distcheck job. Closes ticket 33194. 3066 - Sort the Travis jobs in order of speed: putting the slowest jobs 3067 first takes full advantage of Travis job concurrency. Closes 3068 ticket 33194. 3069 - Stop allowing the Chutney IPv6 Travis job to fail. This job was 3070 previously configured to fast_finish (which requires 3071 allow_failure), to speed up the build. Closes ticket 33195. 3072 - When a Travis chutney job fails, use chutney's new "diagnostics.sh" 3073 tool to produce detailed diagnostic output. Closes ticket 32792. 3074 3075 3076Changes in version 0.4.2.7 - 2020-03-18 3077 This is the third stable release in the 0.4.2.x series. It backports 3078 numerous fixes from later releases, including a fix for TROVE-2020- 3079 002, a major denial-of-service vulnerability that affected all 3080 released Tor instances since 0.2.1.5-alpha. Using this vulnerability, 3081 an attacker could cause Tor instances to consume a huge amount of CPU, 3082 disrupting their operations for several seconds or minutes. This 3083 attack could be launched by anybody against a relay, or by a directory 3084 cache against any client that had connected to it. The attacker could 3085 launch this attack as much as they wanted, thereby disrupting service 3086 or creating patterns that could aid in traffic analysis. This issue 3087 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592. 3088 3089 We do not have reason to believe that this attack is currently being 3090 exploited in the wild, but nonetheless we advise everyone to upgrade 3091 as soon as packages are available. 3092 3093 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha): 3094 - Fix a denial-of-service bug that could be used by anyone to 3095 consume a bunch of CPU on any Tor relay or authority, or by 3096 directories to consume a bunch of CPU on clients or hidden 3097 services. Because of the potential for CPU consumption to 3098 introduce observable timing patterns, we are treating this as a 3099 high-severity security issue. Fixes bug 33119; bugfix on 3100 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue 3101 as TROVE-2020-002 and CVE-2020-10592. 3102 3103 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha): 3104 - Avoid a remotely triggered memory leak in the case that a circuit 3105 padding machine is somehow negotiated twice on the same circuit. 3106 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls. 3107 This is also tracked as TROVE-2020-004 and CVE-2020-10593. 3108 3109 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha): 3110 - Directory authorities will now send a 503 (not enough bandwidth) 3111 code to clients when under bandwidth pressure. Known relays and 3112 other authorities will always be answered regardless of the 3113 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha. 3114 3115 o Minor features (continuous integration, backport from 0.4.3.2-alpha): 3116 - Stop allowing failures on the Travis CI stem tests job. It looks 3117 like all the stem hangs we were seeing before are now fixed. 3118 Closes ticket 33075. 3119 3120 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha): 3121 - Lowercase the configured value of BridgeDistribution before adding 3122 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. 3123 3124 o Minor bugfixes (logging, backport from 0.4.3.2-alpha): 3125 - If we encounter a bug when flushing a buffer to a TLS connection, 3126 only log the bug once per invocation of the Tor process. 3127 Previously we would log with every occurrence, which could cause 3128 us to run out of disk space. Fixes bug 33093; bugfix 3129 on 0.3.2.2-alpha. 3130 3131 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha): 3132 - Fix an assertion failure that could result from a corrupted 3133 ADD_ONION control port command. Found by Saibato. Fixes bug 33137; 3134 bugfix on 0.3.3.1-alpha. This issue is also tracked 3135 as TROVE-2020-003. 3136 3137 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha): 3138 - Fix a syntax warning given by newer versions of Rust that was 3139 creating problems for our continuous integration. Fixes bug 33212; 3140 bugfix on 0.3.5.1-alpha. 3141 3142 o Testing (Travis CI, backport from 0.4.3.3-alpha): 3143 - Remove a redundant distcheck job. Closes ticket 33194. 3144 - Sort the Travis jobs in order of speed: putting the slowest jobs 3145 first takes full advantage of Travis job concurrency. Closes 3146 ticket 33194. 3147 - Stop allowing the Chutney IPv6 Travis job to fail. This job was 3148 previously configured to fast_finish (which requires 3149 allow_failure), to speed up the build. Closes ticket 33195. 3150 - When a Travis chutney job fails, use chutney's new "diagnostics.sh" 3151 tool to produce detailed diagnostic output. Closes ticket 32792. 3152 3153 3154Changes in version 0.4.1.9 - 2020-03-18 3155 Tor 0.4.1.9 backports important fixes from later Tor releases, 3156 including a fix for TROVE-2020-002, a major denial-of-service 3157 vulnerability that affected all released Tor instances since 3158 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor 3159 instances to consume a huge amount of CPU, disrupting their operations 3160 for several seconds or minutes. This attack could be launched by 3161 anybody against a relay, or by a directory cache against any client 3162 that had connected to it. The attacker could launch this attack as 3163 much as they wanted, thereby disrupting service or creating patterns 3164 that could aid in traffic analysis. This issue was found by OSS-Fuzz, 3165 and is also tracked as CVE-2020-10592. 3166 3167 We do not have reason to believe that this attack is currently being 3168 exploited in the wild, but nonetheless we advise everyone to upgrade 3169 as soon as packages are available. 3170 3171 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha): 3172 - Fix a denial-of-service bug that could be used by anyone to 3173 consume a bunch of CPU on any Tor relay or authority, or by 3174 directories to consume a bunch of CPU on clients or hidden 3175 services. Because of the potential for CPU consumption to 3176 introduce observable timing patterns, we are treating this as a 3177 high-severity security issue. Fixes bug 33119; bugfix on 3178 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue 3179 as TROVE-2020-002 and CVE-2020-10592. 3180 3181 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha): 3182 - Avoid a remotely triggered memory leak in the case that a circuit 3183 padding machine is somehow negotiated twice on the same circuit. 3184 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls. 3185 This is also tracked as TROVE-2020-004 and CVE-2020-10593. 3186 3187 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha): 3188 - Lowercase the configured value of BridgeDistribution before adding 3189 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. 3190 3191 o Minor bugfixes (logging, backport from 0.4.3.2-alpha): 3192 - If we encounter a bug when flushing a buffer to a TLS connection, 3193 only log the bug once per invocation of the Tor process. 3194 Previously we would log with every occurrence, which could cause 3195 us to run out of disk space. Fixes bug 33093; bugfix 3196 on 0.3.2.2-alpha. 3197 3198 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha): 3199 - Fix an assertion failure that could result from a corrupted 3200 ADD_ONION control port command. Found by Saibato. Fixes bug 33137; 3201 bugfix on 0.3.3.1-alpha. This issue is also tracked 3202 as TROVE-2020-003. 3203 3204 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha): 3205 - Fix a syntax warning given by newer versions of Rust that was 3206 creating problems for our continuous integration. Fixes bug 33212; 3207 bugfix on 0.3.5.1-alpha. 3208 3209 o Testing (Travis CI, backport from 0.4.3.3-alpha): 3210 - Remove a redundant distcheck job. Closes ticket 33194. 3211 - Sort the Travis jobs in order of speed: putting the slowest jobs 3212 first takes full advantage of Travis job concurrency. Closes 3213 ticket 33194. 3214 - Stop allowing the Chutney IPv6 Travis job to fail. This job was 3215 previously configured to fast_finish (which requires 3216 allow_failure), to speed up the build. Closes ticket 33195. 3217 - When a Travis chutney job fails, use chutney's new "diagnostics.sh" 3218 tool to produce detailed diagnostic output. Closes ticket 32792. 3219 3220 3221Changes in version 0.3.5.10 - 2020-03-18 3222 Tor 0.3.5.10 backports many fixes from later Tor releases, including a 3223 fix for TROVE-2020-002, a major denial-of-service vulnerability that 3224 affected all released Tor instances since 0.2.1.5-alpha. Using this 3225 vulnerability, an attacker could cause Tor instances to consume a huge 3226 amount of CPU, disrupting their operations for several seconds or 3227 minutes. This attack could be launched by anybody against a relay, or 3228 by a directory cache against any client that had connected to it. The 3229 attacker could launch this attack as much as they wanted, thereby 3230 disrupting service or creating patterns that could aid in traffic 3231 analysis. This issue was found by OSS-Fuzz, and is also tracked 3232 as CVE-2020-10592. 3233 3234 We do not have reason to believe that this attack is currently being 3235 exploited in the wild, but nonetheless we advise everyone to upgrade 3236 as soon as packages are available. 3237 3238 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha): 3239 - Fix a denial-of-service bug that could be used by anyone to 3240 consume a bunch of CPU on any Tor relay or authority, or by 3241 directories to consume a bunch of CPU on clients or hidden 3242 services. Because of the potential for CPU consumption to 3243 introduce observable timing patterns, we are treating this as a 3244 high-severity security issue. Fixes bug 33119; bugfix on 3245 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue 3246 as TROVE-2020-002 and CVE-2020-10592. 3247 3248 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha): 3249 - Correct how we use libseccomp. Particularly, stop assuming that 3250 rules are applied in a particular order or that more rules are 3251 processed after the first match. Neither is the case! In 3252 libseccomp <2.4.0 this lead to some rules having no effect. 3253 libseccomp 2.4.0 changed how rules are generated, leading to a 3254 different ordering, which in turn led to a fatal crash during 3255 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by 3256 Peter Gerber. 3257 3258 o Minor features (continuous integration, backport from 0.4.3.2-alpha): 3259 - Stop allowing failures on the Travis CI stem tests job. It looks 3260 like all the stem hangs we were seeing before are now fixed. 3261 Closes ticket 33075. 3262 3263 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha): 3264 - Lowercase the configured value of BridgeDistribution before adding 3265 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. 3266 3267 o Minor bugfixes (crash, backport from 0.4.2.4-rc): 3268 - When running Tor with an option like --verify-config or 3269 --dump-config that does not start the event loop, avoid crashing 3270 if we try to exit early because of an error. Fixes bug 32407; 3271 bugfix on 0.3.3.1-alpha. 3272 3273 o Minor bugfixes (logging, backport from 0.4.3.2-alpha): 3274 - If we encounter a bug when flushing a buffer to a TLS connection, 3275 only log the bug once per invocation of the Tor process. 3276 Previously we would log with every occurrence, which could cause 3277 us to run out of disk space. Fixes bug 33093; bugfix 3278 on 0.3.2.2-alpha. 3279 3280 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha): 3281 - Fix an assertion failure that could result from a corrupted 3282 ADD_ONION control port command. Found by Saibato. Fixes bug 33137; 3283 bugfix on 0.3.3.1-alpha. This issue is also tracked 3284 as TROVE-2020-003. 3285 3286 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha): 3287 - Fix a syntax warning given by newer versions of Rust that was 3288 creating problems for our continuous integration. Fixes bug 33212; 3289 bugfix on 0.3.5.1-alpha. 3290 3291 o Testing (backport from 0.4.3.1-alpha): 3292 - Re-enable the Travis CI macOS Chutney build, but don't let it 3293 prevent the Travis job from finishing. (The Travis macOS jobs are 3294 slow, so we don't want to have it delay the whole CI process.) 3295 Closes ticket 32629. 3296 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on 3297 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we 3298 fix the sandbox errors in 32722. Closes ticket 32240. 3299 3300 o Testing (continuous integration, backport from 0.4.3.1-alpha): 3301 - Use zstd in our Travis Linux builds. Closes ticket 32242. 3302 3303 o Testing (Travis CI, backport from 0.4.3.3-alpha): 3304 - Remove a redundant distcheck job. Closes ticket 33194. 3305 - Sort the Travis jobs in order of speed: putting the slowest jobs 3306 first takes full advantage of Travis job concurrency. Closes 3307 ticket 33194. 3308 - Stop allowing the Chutney IPv6 Travis job to fail. This job was 3309 previously configured to fast_finish (which requires 3310 - When a Travis chutney job fails, use chutney's new "diagnostics.sh" 3311 tool to produce detailed diagnostic output. Closes ticket 32792. 3312 3313 3314Changes in version 0.4.3.2-alpha - 2020-02-10 3315 This is the second stable alpha release in the Tor 0.4.3.x series. It 3316 fixes several bugs present in the previous alpha release. Anybody 3317 running the previous alpha should upgrade, and look for bugs in this 3318 one instead. 3319 3320 o Major bugfixes (onion service client, authorization): 3321 - On a NEWNYM signal, purge entries from the ephemeral client 3322 authorization cache. The permanent ones are kept. Fixes bug 33139; 3323 bugfix on 0.4.3.1-alpha. 3324 3325 o Minor features (best practices tracker): 3326 - Practracker now supports a --regen-overbroad option to regenerate 3327 the exceptions file, but only to revise exceptions to be _less_ 3328 tolerant of best-practices violations. Closes ticket 32372. 3329 3330 o Minor features (continuous integration): 3331 - Run Doxygen Makefile target on Travis, so we can learn about 3332 regressions in our internal documentation. Closes ticket 32455. 3333 - Stop allowing failures on the Travis CI stem tests job. It looks 3334 like all the stem hangs we were seeing before are now fixed. 3335 Closes ticket 33075. 3336 3337 o Minor bugfixes (build system): 3338 - Revise configure options that were either missing or incorrect in 3339 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha. 3340 3341 o Minor bugfixes (controller protocol): 3342 - Fix a memory leak introduced by refactoring of control reply 3343 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha. 3344 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix 3345 on 0.4.3.1-alpha. 3346 - When receiving "ACTIVE" or "DORMANT" signals on the control port, 3347 report them as SIGNAL events. Previously we would log a bug 3348 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha. 3349 3350 o Minor bugfixes (logging): 3351 - If we encounter a bug when flushing a buffer to a TLS connection, 3352 only log the bug once per invocation of the Tor process. 3353 Previously we would log with every occurrence, which could cause 3354 us to run out of disk space. Fixes bug 33093; bugfix 3355 on 0.3.2.2-alpha. 3356 - When logging a bug, do not say "Future instances of this warning 3357 will be silenced" unless we are actually going to silence them. 3358 Previously we would say this whenever a BUG() check failed in the 3359 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha. 3360 3361 o Minor bugfixes (onion service v2): 3362 - Move a series of v2 onion service warnings to protocol-warning 3363 level because they can all be triggered remotely by a malformed 3364 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha. 3365 3366 o Minor bugfixes (onion service v3, client authorization): 3367 - When removing client authorization credentials using the control 3368 port, also remove the associated descriptor, so the onion service 3369 can no longer be contacted. Fixes bug 33148; bugfix 3370 on 0.4.3.1-alpha. 3371 3372 o Minor bugfixes (pluggable transports): 3373 - When receiving a message on standard error from a pluggable 3374 transport, log it at info level, rather than as a warning. Fixes 3375 bug 33005; bugfix on 0.4.0.1-alpha. 3376 3377 o Minor bugfixes (rust, build): 3378 - Fix a syntax warning given by newer versions of Rust that was 3379 creating problems for our continuous integration. Fixes bug 33212; 3380 bugfix on 0.3.5.1-alpha. 3381 3382 o Minor bugfixes (TLS bug handling): 3383 - When encountering a bug in buf_read_from_tls(), return a "MISC" 3384 error code rather than "WANTWRITE". This change might help avoid 3385 some CPU-wasting loops if the bug is ever triggered. Bug reported 3386 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha. 3387 3388 o Code simplification and refactoring (mainloop): 3389 - Simplify the ip_address_changed() function by removing redundant 3390 checks. Closes ticket 33091. 3391 3392 o Documentation (manpage): 3393 - Split "Circuit Timeout" options and "Node Selection" options into 3394 their own sections of the tor manpage. Closes tickets 32928 and 3395 32929. Work by Swati Thacker as part of Google Season of Docs. 3396 3397 3398Changes in version 0.4.2.6 - 2020-01-30 3399 This is the second stable release in the 0.4.2.x series. It backports 3400 several bugfixes from 0.4.3.1-alpha, including some that had affected 3401 the Linux seccomp2 sandbox or Windows services. If you're running with 3402 one of those configurations, you'll probably want to upgrade; 3403 otherwise, you should be fine with 0.4.2.5. 3404 3405 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha): 3406 - Correct how we use libseccomp. Particularly, stop assuming that 3407 rules are applied in a particular order or that more rules are 3408 processed after the first match. Neither is the case! In 3409 libseccomp <2.4.0 this led to some rules having no effect. 3410 libseccomp 2.4.0 changed how rules are generated, leading to a 3411 different ordering, which in turn led to a fatal crash during 3412 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by 3413 Peter Gerber. 3414 - Fix crash when reloading logging configuration while the 3415 experimental sandbox is enabled. Fixes bug 32841; bugfix on 3416 0.4.1.7. Patch by Peter Gerber. 3417 3418 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha): 3419 - Use GCC/Clang's printf-checking feature to make sure that 3420 tor_assertf() arguments are correctly typed. Fixes bug 32765; 3421 bugfix on 0.4.1.1-alpha. 3422 3423 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha): 3424 - Avoid a possible crash when trying to log a (fatal) assertion 3425 failure about mismatched magic numbers in configuration objects. 3426 Fixes bug 32771; bugfix on 0.4.2.1-alpha. 3427 3428 o Minor bugfixes (testing, backport from 0.4.3.1-alpha): 3429 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the 3430 test_practracker.sh script. Doing so caused a test failure. Fixes 3431 bug 32705; bugfix on 0.4.2.1-alpha. 3432 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when 3433 skipping practracker checks. Fixes bug 32705; bugfix 3434 on 0.4.2.1-alpha. 3435 3436 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha): 3437 - Initialize the publish/subscribe system when running as a windows 3438 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha. 3439 3440 o Testing (backport from 0.4.3.1-alpha): 3441 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on 3442 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we 3443 fix the sandbox errors in 32722. Closes ticket 32240. 3444 - Re-enable the Travis CI macOS Chutney build, but don't let it 3445 prevent the Travis job from finishing. (The Travis macOS jobs are 3446 slow, so we don't want to have it delay the whole CI process.) 3447 Closes ticket 32629. 3448 3449 o Testing (continuous integration, backport from 0.4.3.1-alpha): 3450 - Use zstd in our Travis Linux builds. Closes ticket 32242. 3451 3452 3453Changes in version 0.4.1.8 - 2020-01-30 3454 This release backports several bugfixes from later release series, 3455 including some that had affected the Linux seccomp2 sandbox or Windows 3456 services. If you're running with one of those configurations, you'll 3457 probably want to upgrade; otherwise, you should be fine with your 3458 current version of 0.4.1.x. 3459 3460 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha): 3461 - Correct how we use libseccomp. Particularly, stop assuming that 3462 rules are applied in a particular order or that more rules are 3463 processed after the first match. Neither is the case! In 3464 libseccomp <2.4.0 this led to some rules having no effect. 3465 libseccomp 2.4.0 changed how rules are generated, leading to a 3466 different ordering, which in turn led to a fatal crash during 3467 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by 3468 Peter Gerber. 3469 - Fix crash when reloading logging configuration while the 3470 experimental sandbox is enabled. Fixes bug 32841; bugfix on 3471 0.4.1.7. Patch by Peter Gerber. 3472 3473 o Minor bugfixes (crash, backport form 0.4.2.4-rc): 3474 - When running Tor with an option like --verify-config or 3475 --dump-config that does not start the event loop, avoid crashing 3476 if we try to exit early because of an error. Fixes bug 32407; 3477 bugfix on 0.3.3.1-alpha. 3478 3479 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha): 3480 - Initialize the publish/subscribe system when running as a windows 3481 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha. 3482 3483 o Testing (backport from 0.4.3.1-alpha): 3484 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on 3485 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we 3486 fix the sandbox errors in 32722. Closes ticket 32240. 3487 - Re-enable the Travis CI macOS Chutney build, but don't let it 3488 prevent the Travis job from finishing. (The Travis macOS jobs are 3489 slow, so we don't want to have it delay the whole CI process.) 3490 Closes ticket 32629. 3491 3492 o Testing (continuous integration, backport from 0.4.3.1-alpha): 3493 - Use zstd in our Travis Linux builds. Closes ticket 32242. 3494 3495 3496Changes in version 0.4.3.1-alpha - 2020-01-22 3497 This is the first alpha release in the 0.4.3.x series. It includes 3498 improved support for application integration of onion services, support 3499 for building in a client-only mode, and newly improved internal 3500 documentation (online at https://src-ref.docs.torproject.org/tor/). It 3501 also has numerous other small bugfixes and features, as well as 3502 improvements to our code's internal organization that should help us 3503 write better code in the future. 3504 3505 o New system requirements: 3506 - When building Tor, you now need to have Python 3 in order to run 3507 the integration tests. (Python 2 is officially unsupported 3508 upstream, as of 1 Jan 2020.) Closes ticket 32608. 3509 3510 o Major features (build system): 3511 - The relay code can now be disabled using the --disable-module-relay 3512 configure option. When this option is set, we also disable the 3513 dirauth module. Closes ticket 32123. 3514 - When Tor is compiled --disable-module-relay, we also omit the code 3515 used to act as a directory cache. Closes ticket 32487. 3516 3517 o Major features (directory authority, ed25519): 3518 - Add support for banning a relay's ed25519 keys in the approved- 3519 routers file. This will help us migrate away from RSA keys in the 3520 future. Previously, only RSA keys could be banned in approved- 3521 routers. Resolves ticket 22029. Patch by Neel Chauhan. 3522 3523 o Major features (onion service, controller): 3524 - New control port commands to manage client-side onion service 3525 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds 3526 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and 3527 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381. 3528 3529 o Major features (onion service, SOCKS5): 3530 - Introduce a new SocksPort flag, ExtendedErrors, to support more 3531 detailed error codes in information for applications that support 3532 them. Closes ticket 30382; implements proposal 304. 3533 3534 o Major features (proxy): 3535 - In addition to its current supported proxy types (HTTP CONNECT, 3536 SOCKS4, and SOCKS5), Tor can now make its OR connections through a 3537 HAProxy server. A new torrc option was added to specify the 3538 address/port of the server: TCPProxy <protocol> <host>:<port>. 3539 Currently the only supported protocol for the option is haproxy. 3540 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop). 3541 3542 o Major bugfixes (linux seccomp sandbox): 3543 - Correct how we use libseccomp. Particularly, stop assuming that 3544 rules are applied in a particular order or that more rules are 3545 processed after the first match. Neither is the case! In 3546 libseccomp <2.4.0 this led to some rules having no effect. 3547 libseccomp 2.4.0 changed how rules are generated, leading to a 3548 different ordering, which in turn led to a fatal crash during 3549 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by 3550 Peter Gerber. 3551 - Fix crash when reloading logging configuration while the 3552 experimental sandbox is enabled. Fixes bug 32841; bugfix on 3553 0.4.1.7. Patch by Peter Gerber. 3554 3555 o Major bugfixes (networking): 3556 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests, 3557 and accept strings as well as binary addresses. Fixes bug 32315; 3558 bugfix on 0.3.5.1-alpha. 3559 3560 o Major bugfixes (onion service): 3561 - Report HS circuit failure back into the HS subsystem so we take 3562 appropriate action with regards to the client introduction point 3563 failure cache. This improves reachability of onion services, since 3564 now clients notice failing introduction circuits properly. Fixes 3565 bug 32020; bugfix on 0.3.2.1-alpha. 3566 3567 o Minor feature (configure, build system): 3568 - Output a list of enabled/disabled features at the end of the 3569 configure process in a pleasing way. Closes ticket 31373. 3570 3571 o Minor feature (heartbeat, onion service): 3572 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS 3573 message. Closes ticket 31371. 3574 3575 o Minor features (configuration validation): 3576 - Configuration validation can now be done by per-module callbacks, 3577 rather than a global validation function. This will let us reduce 3578 the size of config.c and some of its more cumbersome functions. 3579 Closes ticket 31241. 3580 3581 o Minor features (configuration): 3582 - If a configured hardware crypto accelerator in AccelName is 3583 prefixed with "!", Tor now exits when it cannot be found. Closes 3584 ticket 32406. 3585 - We now use flag-driven logic to warn about obsolete configuration 3586 fields, so that we can include their names. In 0.4.2, we used a 3587 special type, which prevented us from generating good warnings. 3588 Implements ticket 32404. 3589 3590 o Minor features (controller): 3591 - Add stream isolation data to STREAM event. Closes ticket 19859. 3592 - Implement a new GETINFO command to fetch microdescriptor 3593 consensus. Closes ticket 31684. 3594 3595 o Minor features (debugging, directory system): 3596 - Don't crash when we find a non-guard with a guard-fraction value 3597 set. Instead, log a bug warning, in an attempt to figure out how 3598 this happened. Diagnostic for ticket 32868. 3599 3600 o Minor features (defense in depth): 3601 - Add additional checks around tor_vasprintf() usage, in case the 3602 function returns an error. Patch by Tobias Stoeckmann. Fixes 3603 ticket 31147. 3604 3605 o Minor features (developer tooling): 3606 - Remove the 0.2.9.x series branches from git scripts (git-merge- 3607 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh). 3608 Closes ticket 32772. 3609 3610 o Minor features (developer tools): 3611 - Add a check_cocci_parse.sh script that checks that new code is 3612 parseable by Coccinelle. Add an exceptions file for unparseable 3613 files, and run the script from travis CI. Closes ticket 31919. 3614 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile 3615 target. Closes ticket 31919. 3616 - Add a rename_c_identifiers.py tool to rename a bunch of C 3617 identifiers at once, and generate a well-formed commit message 3618 describing the change. This should help with refactoring. Closes 3619 ticket 32237. 3620 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle 3621 semantic patching tool with the correct flags. These flags are 3622 fairly easy to forget, and these scripts should help us use 3623 Coccinelle more effectively in the future. Closes ticket 31705. 3624 3625 o Minor features (Doxygen): 3626 - Update Doxygen configuration file to a more recent template (from 3627 1.8.15). Closes ticket 32110. 3628 - "make doxygen" now works with out-of-tree builds. Closes 3629 ticket 32113. 3630 - Make sure that doxygen outputs documentation for all of our C 3631 files. Previously, some were missing @file declarations, causing 3632 them to be ignored. Closes ticket 32307. 3633 - Our "make doxygen" target now respects --enable-fatal-warnings by 3634 default, and does not warn about items that are missing 3635 documentation. To warn about missing documentation, run configure 3636 with the "--enable-missing-doc-warnings" flag: doing so suspends 3637 fatal warnings for doxygen. Closes ticket 32385. 3638 3639 o Minor features (git scripts): 3640 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone 3641 customisation. Closes ticket 32347. 3642 - Add git-setup-dirs.sh, which sets up an upstream git repository 3643 and worktrees for tor maintainers. Closes ticket 29603. 3644 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra 3645 remote. Closes ticket 32347. 3646 - Call the check_cocci_parse.sh script from the git commit and push 3647 hooks. Closes ticket 31919. 3648 - Make git-push-all.sh skip unchanged branches when pushing to 3649 upstream. The script already skipped unchanged test branches. 3650 Closes ticket 32216. 3651 - Make git-setup-dirs.sh create a master symlink in the worktree 3652 directory. Closes ticket 32347. 3653 - Skip unmodified source files when doing some existing git hook 3654 checks. Related to ticket 31919. 3655 3656 o Minor features (IPv6, client): 3657 - Make Tor clients tell dual-stack exits that they prefer IPv6 3658 connections. This change is equivalent to setting the PreferIPv6 3659 flag on SOCKSPorts (and most other listener ports). Tor Browser 3660 has been setting this flag for some time, and we want to remove a 3661 client distinguisher at exits. Closes ticket 32637. 3662 3663 o Minor features (portability, android): 3664 - When building for Android, disable some tests that depend on $HOME 3665 and/or pwdb, which Android doesn't have. Closes ticket 32825. 3666 Patch from Hans-Christoph Steiner. 3667 3668 o Minor features (relay modularity): 3669 - Split the relay and server pluggable transport config code into 3670 separate files in the relay module. Disable this code when the 3671 relay module is disabled. Closes part of ticket 32213. 3672 - When the relay module is disabled, reject attempts to set the 3673 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or 3674 ServerTransport* options, rather than ignoring the values of these 3675 options. Closes part of ticket 32213. 3676 3677 o Minor features (relay): 3678 - When the relay module is disabled, change the default config so 3679 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410. 3680 3681 o Minor features (release tools): 3682 - Port our ChangeLog formatting and sorting tools to Python 3. 3683 Closes ticket 32704. 3684 3685 o Minor features (testing): 3686 - Detect some common failure cases for test_parseconf.sh in 3687 src/test/conf_failures. Closes ticket 32451. 3688 - Allow test_parseconf.sh to test expected log outputs for successful 3689 configs, as well as failed configs. Closes ticket 32451. 3690 - The test_parseconf.sh script now supports result variants for any 3691 combination of the optional libraries lzma, nss, and zstd. Closes 3692 ticket 32397. 3693 3694 o Minor features (tests, Android): 3695 - When running the unit tests on Android, create temporary files in 3696 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a 3697 patch from Hans-Christoph Steiner. 3698 3699 o Minor bugfixes (bridges): 3700 - Lowercase the configured value of BridgeDistribution before adding 3701 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha. 3702 3703 o Minor bugfixes (build system): 3704 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370; 3705 bugfix on 0.4.1.2-alpha. 3706 3707 o Minor bugfixes (configuration handling): 3708 - Make control_event_conf_changed() take in a config_line_t instead 3709 of a smartlist of alternating key/value entries. Fixes bug 31531; 3710 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan. 3711 3712 o Minor bugfixes (configuration): 3713 - Check for multiplication overflow when parsing memory units inside 3714 configuration. Fixes bug 30920; bugfix on 0.0.9rc1. 3715 - When dumping the configuration, stop adding a trailing space after 3716 the option name when there is no option value. This issue only 3717 affects options that accept an empty value or list. (Most options 3718 reject empty values, or delete the entire line from the dumped 3719 options.) Fixes bug 32352; bugfix on 0.0.9pre6. 3720 - Avoid changing the user's value of HardwareAccel as stored by 3721 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes 3722 bug 32382; bugfix on 0.2.2.1-alpha. 3723 - When creating a KeyDirectory with the same location as the 3724 DataDirectory (not recommended), respect the DataDirectory's 3725 group-readable setting if one has not been set for the 3726 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha. 3727 3728 o Minor bugfixes (controller): 3729 - In routerstatus_has_changed(), check all the fields that are 3730 output over the control port. Fixes bug 20218; bugfix 3731 on 0.1.1.11-alpha 3732 3733 o Minor bugfixes (correctness checks): 3734 - Use GCC/Clang's printf-checking feature to make sure that 3735 tor_assertf() arguments are correctly typed. Fixes bug 32765; 3736 bugfix on 0.4.1.1-alpha. 3737 3738 o Minor bugfixes (developer tools): 3739 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug 3740 31336; bugfix on 0.4.1.2-alpha. 3741 3742 o Minor bugfixes (dirauth module): 3743 - Split the dirauth config code into a separate file in the dirauth 3744 module. Disable this code when the dirauth module is disabled. 3745 Closes ticket 32213. 3746 - When the dirauth module is disabled, reject attempts to set the 3747 AuthoritativeDir option, rather than ignoring the value of the 3748 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha. 3749 3750 o Minor bugfixes (embedded Tor): 3751 - When starting Tor any time after the first time in a process, 3752 register the thread in which it is running as the main thread. 3753 Previously, we only did this on Windows, which could lead to bugs 3754 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix 3755 on 0.3.3.1-alpha. 3756 3757 o Minor bugfixes (git scripts): 3758 - Avoid sleeping before the last push in git-push-all.sh. Closes 3759 ticket 32216. 3760 - Forward all unrecognised arguments in git-push-all.sh to git push. 3761 Closes ticket 32216. 3762 3763 o Minor bugfixes (hidden service v3): 3764 - Do not rely on a "circuit established" flag for intro circuits but 3765 instead always query the HS circuit map. This is to avoid sync 3766 issue with that flag and the map. Fixes bug 32094; bugfix 3767 on 0.3.2.1-alpha. 3768 3769 o Minor bugfixes (logging, crash): 3770 - Avoid a possible crash when trying to log a (fatal) assertion 3771 failure about mismatched magic numbers in configuration objects. 3772 Fixes bug 32771; bugfix on 0.4.2.1-alpha. 3773 3774 o Minor bugfixes (onion service v2): 3775 - When sending the INTRO cell for a v2 Onion Service, look at the 3776 failure cache alongside timeout values to check if the intro point 3777 is marked as failed. Previously, we only looked at the relay 3778 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by 3779 Neel Chauhan. 3780 3781 o Minor bugfixes (onion services v3, client): 3782 - Properly handle the client rendezvous circuit timeout. Previously 3783 Tor would sometimes timeout a rendezvous circuit awaiting the 3784 introduction ACK, and find itself unable to re-establish all 3785 circuits because the rendezvous circuit timed out too early. Fixes 3786 bug 32021; bugfix on 0.3.2.1-alpha. 3787 3788 o Minor bugfixes (onion services): 3789 - In cancel_descriptor_fetches(), use 3790 connection_list_by_type_purpose() instead of 3791 connection_list_by_type_state(). Fixes bug 32639; bugfix on 3792 0.3.2.1-alpha. Patch by Neel Chauhan. 3793 3794 o Minor bugfixes (scripts): 3795 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371; 3796 bugfix on 0.4.0.1-alpha. 3797 3798 o Minor bugfixes (test): 3799 - Use the same code to find the tor binary in all of our test 3800 scripts. This change makes sure we are always using the coverage 3801 binary when coverage is enabled. Fixes bug 32368; bugfix 3802 on 0.2.7.3-rc. 3803 3804 o Minor bugfixes (testing): 3805 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh. 3806 Fixes bug 32468; bugfix on 0.4.2.1-alpha. 3807 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the 3808 test_practracker.sh script. Doing so caused a test failure. Fixes 3809 bug 32705; bugfix on 0.4.2.1-alpha. 3810 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when 3811 skipping practracker checks. Fixes bug 32705; bugfix 3812 on 0.4.2.1-alpha. 3813 3814 o Minor bugfixes (tests): 3815 - Our option-validation tests no longer depend on specially 3816 configured non-default, non-passing sets of options. Previously, 3817 the tests had been written to assume that options would _not_ be 3818 set to their defaults, which led to needless complexity and 3819 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha. 3820 3821 o Minor bugfixes (windows service): 3822 - Initialize the publish/subscribe system when running as a windows 3823 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha. 3824 3825 o Deprecated features: 3826 - Deprecate the ClientAutoIPv6ORPort option. This option was not 3827 true "Happy Eyeballs", and often failed on connections that 3828 weren't reliably dual-stack. Closes ticket 32942. Patch by 3829 Neel Chauhan. 3830 3831 o Documentation: 3832 - Provide a quickstart guide for a Circuit Padding Framework, and 3833 documentation for researchers to implement and study circuit 3834 padding machines. Closes ticket 28804. 3835 - Add documentation in 'HelpfulTools.md' to describe how to build a 3836 tag file. Closes ticket 32779. 3837 - Create a high-level description of the long-term software 3838 architecture goals. Closes ticket 32206. 3839 - Describe the --dump-config command in the manual page. Closes 3840 ticket 32467. 3841 - Unite coding advice from this_not_that.md in torguts repo into our 3842 coding standards document. Resolves ticket 31853. 3843 3844 o Removed features: 3845 - Our Doxygen configuration no longer generates LaTeX output. The 3846 reference manual produced by doing this was over 4000 pages long, 3847 and generally unusable. Closes ticket 32099. 3848 - The option "TestingEstimatedDescriptorPropagationTime" is now 3849 marked as obsolete. It has had no effect since 0.3.0.7, when 3850 clients stopped rejecting consensuses "from the future". Closes 3851 ticket 32807. 3852 - We no longer support consensus methods before method 28; these 3853 methods were only used by authorities running versions of Tor that 3854 are now at end-of-life. In effect, this means that clients, 3855 relays, and authorities now assume that authorities will be 3856 running version 0.3.5.x or later. Closes ticket 32695. 3857 3858 o Testing: 3859 - Add more test cases for tor's UTF-8 validation function. Also, 3860 check the arguments passed to the function for consistency. Closes 3861 ticket 32845. 3862 - Improve test coverage for relay and dirauth config code, focusing 3863 on option validation and normalization. Closes ticket 32213. 3864 - Improve the consistency of test_parseconf.sh output, and run all 3865 the tests, even if one fails. Closes ticket 32213. 3866 - Re-enable the Travis CI macOS Chutney build, but don't let it 3867 prevent the Travis job from finishing. (The Travis macOS jobs are 3868 slow, so we don't want to have it delay the whole CI process.) 3869 Closes ticket 32629. 3870 - Run the practracker unit tests in the pre-commit git hook. Closes 3871 ticket 32609. 3872 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on 3873 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we 3874 fix the sandbox errors in 32722. Closes ticket 32240. 3875 3876 o Code simplification and refactoring (channel): 3877 - Channel layer had a variable length cell handler that was not used 3878 and thus removed. Closes ticket 32892. 3879 3880 o Code simplification and refactoring (configuration): 3881 - Immutability is now implemented as a flag on individual 3882 configuration options rather than as part of the option-transition 3883 checking code. Closes ticket 32344. 3884 - Instead of keeping a list of configuration options to check for 3885 relative paths, check all the options whose type is "FILENAME". 3886 Solves part of ticket 32339. 3887 - Our default log (which ordinarily sends NOTICE-level messages to 3888 standard output) is now handled in a more logical manner. 3889 Previously, we replaced the configured log options if they were 3890 empty. Now, we interpret an empty set of log options as meaning 3891 "use the default log". Closes ticket 31999. 3892 - Remove some unused arguments from the options_validate() function, 3893 to simplify our code and tests. Closes ticket 32187. 3894 - Simplify the options_validate() code so that it looks at the 3895 default options directly, rather than taking default options as an 3896 argument. This change lets us simplify its interface. Closes 3897 ticket 32185. 3898 - Use our new configuration architecture to move most authority- 3899 related options to the directory authority module. Closes 3900 ticket 32806. 3901 - When parsing the command line, handle options that determine our 3902 "quiet level" and our mode of operation (e.g., --dump-config and 3903 so on) all in one table. Closes ticket 32003. 3904 3905 o Code simplification and refactoring (controller): 3906 - Create a new abstraction for formatting control protocol reply 3907 lines based on key-value pairs. Refactor some existing control 3908 protocol code to take advantage of this. Closes ticket 30984. 3909 - Create a helper function that can fetch network status or 3910 microdesc consensuses. Closes ticket 31684. 3911 3912 o Code simplification and refactoring (dirauth modularization): 3913 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function. 3914 Closes ticket 32163. 3915 - Replace some confusing identifiers in process_descs.c. Closes 3916 ticket 29826. 3917 - Simplify some relay and dirauth config code. Closes ticket 32213. 3918 3919 o Code simplification and refactoring (misc): 3920 - Make all the structs we declare follow the same naming convention 3921 of ending with "_t". Closes ticket 32415. 3922 - Move and rename some configuration-related code for clarity. 3923 Closes ticket 32304. 3924 - Our include.am files are now broken up by subdirectory. 3925 Previously, src/core/include.am covered all of the subdirectories 3926 in "core", "feature", and "app". Closes ticket 32137. 3927 - Remove underused NS*() macros from test code: they make our tests 3928 more confusing, especially for code-formatting tools. Closes 3929 ticket 32887. 3930 3931 o Code simplification and refactoring (relay modularization): 3932 - Disable relay_periodic when the relay module is disabled. Closes 3933 ticket 32244. 3934 - Disable relay_sys when the relay module is disabled. Closes 3935 ticket 32245. 3936 3937 o Code simplification and refactoring (tool support): 3938 - Add numerous missing dependencies to our include files, so that 3939 they can be included in different reasonable orders and still 3940 compile. Addresses part of ticket 32764. 3941 - Fix some parts of our code that were difficult for Coccinelle to 3942 parse. Related to ticket 31705. 3943 - Fix some small issues in our code that prevented automatic 3944 formatting tools from working. Addresses part of ticket 32764. 3945 3946 o Documentation (manpage): 3947 - Alphabetize the Client Options section of the tor manpage. Closes 3948 ticket 32846. 3949 - Alphabetize the General Options section of the tor manpage. Closes 3950 ticket 32708. 3951 - In the tor(1) manpage, reword and improve formatting of the 3952 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket 3953 32277. Based on work by Swati Thacker as part of Google Season 3954 of Docs. 3955 - In the tor(1) manpage, reword and improve formatting of the FILES, 3956 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by 3957 Swati Thacker as part of Google Season of Docs. 3958 3959 o Testing (circuit, EWMA): 3960 - Add unit tests for circuitmux and EWMA subsystems. Closes 3961 ticket 32196. 3962 3963 o Testing (continuous integration): 3964 - Use zstd in our Travis Linux builds. Closes ticket 32242. 3965 3966 3967Changes in version 0.4.2.5 - 2019-12-09 3968 This is the first stable release in the 0.4.2.x series. This series 3969 improves reliability and stability, and includes several stability and 3970 correctness improvements for onion services. It also fixes many smaller 3971 bugs present in previous series. 3972 3973 Per our support policy, we will support the 0.4.2.x series for nine 3974 months, or until three months after the release of a stable 0.4.3.x: 3975 whichever is longer. If you need longer-term support, please stick 3976 with 0.3.5.x, which will we plan to support until Feb 2022. 3977 3978 Per our support policy, we will support the 0.4.2.x series for nine 3979 months, or until three months after the release of a stable 0.4.3.x: 3980 whichever is longer. If you need longer-term support, please stick 3981 with 0.3.5.x, which will we plan to support until Feb 2022. 3982 3983 Below are the changes since 0.4.1.4-rc. For a complete list of changes 3984 since 0.4.1.5, see the ReleaseNotes file. 3985 3986 o Minor features (geoip): 3987 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 3988 Country database. Closes ticket 32685. 3989 3990 o Testing: 3991 - Require C99 standards-conforming code in Travis CI, but allow GNU 3992 gcc extensions. Also activates clang's -Wtypedef-redefinition 3993 warnings. Build some jobs with -std=gnu99, and some jobs without. 3994 Closes ticket 32500. 3995 3996 3997Changes in version 0.4.1.7 - 2019-12-09 3998 This release backports several bugfixes to improve stability and 3999 correctness. Anyone experiencing build problems or crashes with 0.4.1.6, 4000 including all relays relying on AccountingMax, should upgrade. 4001 4002 o Major features (directory authorities, backport from 0.4.2.2-alpha): 4003 - Directory authorities now reject relays running all currently 4004 deprecated release series. The currently supported release series 4005 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549. 4006 4007 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha): 4008 - Avoid a possible crash when restarting Tor in embedded mode and 4009 enabling a different set of publish/subscribe messages. Fixes bug 4010 31898; bugfix on 0.4.1.1-alpha. 4011 4012 o Major bugfixes (relay, backport from 0.4.2.3-alpha): 4013 - Relays now respect their AccountingMax bandwidth again. When 4014 relays entered "soft" hibernation (which typically starts when 4015 we've hit 90% of our AccountingMax), we had stopped checking 4016 whether we should enter hard hibernation. Soft hibernation refuses 4017 new connections and new circuits, but the existing circuits can 4018 continue, meaning that relays could have exceeded their configured 4019 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. 4020 4021 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): 4022 - Stop ignoring torrc options after an %include directive, when the 4023 included directory ends with a file that does not contain any 4024 config options (but does contain comments or whitespace). Fixes 4025 bug 31408; bugfix on 0.3.1.1-alpha. 4026 4027 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): 4028 - Onion services now always use the exact number of intro points 4029 configured with the HiddenServiceNumIntroductionPoints option (or 4030 fewer if nodes are excluded). Before, a service could sometimes 4031 pick more intro points than configured. Fixes bug 31548; bugfix 4032 on 0.3.2.1-alpha. 4033 4034 o Minor features (continuous integration, backport from 0.4.2.2-alpha): 4035 - When building on Appveyor and Travis, pass the "-k" flag to make, 4036 so that we are informed of all compilation failures, not just the 4037 first one or two. Closes ticket 31372. 4038 4039 o Minor features (geoip, backport from 0.4.2.5): 4040 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 4041 Country database. Closes ticket 32685. 4042 4043 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): 4044 - Avoid spurious errors when Appveyor CI fails before the install step. 4045 Fixes bug 31884; bugfix on 0.3.4.2-alpha. 4046 4047 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): 4048 - Fix a BUG() assertion that occurs within a very small race window 4049 between when a client intro circuit opens and when its descriptor 4050 gets cleaned up from the cache. The circuit is now closed early, 4051 which will trigger a re-fetch of the descriptor and continue the 4052 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. 4053 4054 o Minor bugfixes (connections, backport from 0.4.2.3-rc): 4055 - Avoid trying to read data from closed connections, which can cause 4056 needless loops in Libevent and infinite loops in Shadow. Fixes bug 4057 30344; bugfix on 0.1.1.1-alpha. 4058 4059 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): 4060 - On abort, try harder to flush the output buffers of log messages. 4061 On some platforms (macOS), log messages could be discarded when 4062 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4063 - Report the tor version whenever an assertion fails. Previously, we 4064 only reported the Tor version on some crashes, and some non-fatal 4065 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4066 - When tor aborts due to an error, close log file descriptors before 4067 aborting. Closing the logs makes some OSes flush log file buffers, 4068 rather than deleting buffered log lines. Fixes bug 31594; bugfix 4069 on 0.2.5.2-alpha. 4070 4071 o Minor bugfixes (logging, backport from 0.4.2.2-alpha): 4072 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code 4073 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha. 4074 - Disable backtrace signal handlers when shutting down tor. Fixes 4075 bug 31614; bugfix on 0.2.5.2-alpha. 4076 - Rate-limit our the logging message about the obsolete .exit 4077 notation. Previously, there was no limit on this warning, which 4078 could potentially be triggered many times by a hostile website. 4079 Fixes bug 31466; bugfix on 0.2.2.1-alpha. 4080 4081 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): 4082 - Do not log a nonfatal assertion failure when receiving a VERSIONS 4083 cell on a connection using the obsolete v1 link protocol. Log a 4084 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. 4085 4086 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): 4087 - Reset the periodic events' "enabled" flag when Tor is shut down 4088 cleanly. Previously, this flag was left on, which caused periodic 4089 events not to be re-enabled when Tor was relaunched in-process 4090 with tor_api.h after a shutdown. Fixes bug 32058; bugfix 4091 on 0.3.3.1-alpha. 4092 4093 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha): 4094 - Avoid some undefined behaviour when freeing mutexes. Fixes bug 4095 31736; bugfix on 0.0.7. 4096 4097 o Minor bugfixes (process management, backport from 0.4.2.3-alpha): 4098 - Remove overly strict assertions that triggered when a pluggable 4099 transport failed to launch. Fixes bug 31091; bugfix 4100 on 0.4.0.1-alpha. 4101 - Remove an assertion in the Unix process backend. This assertion 4102 would trigger when we failed to find the executable for a child 4103 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. 4104 4105 o Minor bugfixes (relay, backport from 0.4.2.2-alpha): 4106 - Avoid crashing when starting with a corrupt keys directory where 4107 the old ntor key and the new ntor key are identical. Fixes bug 4108 30916; bugfix on 0.2.4.8-alpha. 4109 4110 o Minor bugfixes (testing, backport from 0.4.2.3-alpha): 4111 - When testing port rebinding, don't busy-wait for tor to log. 4112 Instead, actually sleep for a short time before polling again. 4113 Also improve the formatting of control commands and log messages. 4114 Fixes bug 31837; bugfix on 0.3.5.1-alpha. 4115 4116 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha): 4117 - Avoid a map_anon_nofork test failure due to a signed/unsigned 4118 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha. 4119 4120 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): 4121 - Log bugs about the TLS read buffer's length only once, rather than 4122 filling the logs with similar warnings. Fixes bug 31939; bugfix 4123 on 0.3.0.4-rc. 4124 4125 o Documentation (backport from 0.4.2.2-alpha): 4126 - Explain why we can't destroy the backtrace buffer mutex. Explain 4127 why we don't need to destroy the log mutex. Closes ticket 31736. 4128 4129 o Testing (continuous integration, backport from 0.4.2.3-alpha): 4130 - Disable all but one Travis CI macOS build, to mitigate slow 4131 scheduling of Travis macOS jobs. Closes ticket 32177. 4132 - Run the chutney IPv6 networks as part of Travis CI. Closes 4133 ticket 30860. 4134 - Simplify the Travis CI build matrix, and optimise for build time. 4135 Closes ticket 31859. 4136 - Use Windows Server 2019 instead of Windows Server 2016 in our 4137 Appveyor builds. Closes ticket 32086. 4138 4139 o Testing (continuous integration, backport from 0.4.2.4-rc): 4140 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. 4141 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a 4142 recent version of coccinelle. But leave chutney on Ubuntu Trusty, 4143 until we can fix some Bionic permissions issues (see ticket 4144 32240). Related to ticket 31919. 4145 - Install the mingw OpenSSL package in Appveyor. This makes sure 4146 that the OpenSSL headers and libraries match in Tor's Appveyor 4147 builds. (This bug was triggered by an Appveyor image update.) 4148 Fixes bug 32449; bugfix on 0.3.5.6-rc. 4149 4150 o Testing (continuous integration, backport from 0.4.2.5): 4151 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc 4152 extensions. Also activates clang's -Wtypedef-redefinition warnings. 4153 Build some jobs with -std=gnu99, and some jobs without. 4154 Closes ticket 32500. 4155 4156 4157Changes in version 0.4.0.6 - 2019-12-09 4158 This is the second stable release in the 0.4.0.x series. This release 4159 backports several bugfixes to improve stability and correctness. Anyone 4160 experiencing build problems or crashes with 0.4.0.5, including all relays 4161 relying on AccountingMax, should upgrade. 4162 4163 Note that, per our support policy, support for the 0.4.0.x series will end 4164 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the 4165 latest stable release, or downgrade to 0.3.5.x, which will get long-term 4166 support until 1 Feb 2022. 4167 4168 o Directory authority changes (backport from 0.4.1.5): 4169 - The directory authority "dizum" has a new IP address. Closes 4170 ticket 31406. 4171 4172 o Major bugfixes (bridges, backport from 0.4.1.2-alpha): 4173 - Consider our directory information to have changed when our list 4174 of bridges changes. Previously, Tor would not re-compute the 4175 status of its directory information when bridges changed, and 4176 therefore would not realize that it was no longer able to build 4177 circuits. Fixes part of bug 29875. 4178 - Do not count previously configured working bridges towards our 4179 total of working bridges. Previously, when Tor's list of bridges 4180 changed, it would think that the old bridges were still usable, 4181 and delay fetching router descriptors for the new ones. Fixes part 4182 of bug 29875; bugfix on 0.3.0.1-alpha. 4183 4184 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc): 4185 - When considering upgrading circuits from "waiting for guard" to 4186 "open", always ignore circuits that are marked for close. Otherwise, 4187 we can end up in the situation where a subsystem is notified that 4188 a closing circuit has just opened, leading to undesirable 4189 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. 4190 4191 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha): 4192 - Properly clean up the introduction point map when circuits change 4193 purpose from onion service circuits to pathbias, measurement, or 4194 other circuit types. This should fix some service-side instances 4195 of introduction point failure. Fixes bug 29034; bugfix 4196 on 0.3.2.1-alpha. 4197 4198 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha): 4199 - Fix an unreachable bug in which an introduction point could try to 4200 send an INTRODUCE_ACK with a status code that Trunnel would refuse 4201 to encode, leading the relay to assert(). We've consolidated the 4202 ABI values into Trunnel now. Fixes bug 30454; bugfix 4203 on 0.3.0.1-alpha. 4204 - Clients can now handle unknown status codes from INTRODUCE_ACK 4205 cells. (The NACK behavior will stay the same.) This will allow us 4206 to extend status codes in the future without breaking the normal 4207 client behavior. Fixes another part of bug 30454; bugfix 4208 on 0.3.0.1-alpha. 4209 4210 o Major bugfixes (relay, backport from 0.4.2.3-alpha): 4211 - Relays now respect their AccountingMax bandwidth again. When 4212 relays entered "soft" hibernation (which typically starts when 4213 we've hit 90% of our AccountingMax), we had stopped checking 4214 whether we should enter hard hibernation. Soft hibernation refuses 4215 new connections and new circuits, but the existing circuits can 4216 continue, meaning that relays could have exceeded their configured 4217 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. 4218 4219 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): 4220 - Stop ignoring torrc options after an %include directive, when the 4221 included directory ends with a file that does not contain any 4222 config options (but does contain comments or whitespace). Fixes 4223 bug 31408; bugfix on 0.3.1.1-alpha. 4224 4225 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): 4226 - Onion services now always use the exact number of intro points 4227 configured with the HiddenServiceNumIntroductionPoints option (or 4228 fewer if nodes are excluded). Before, a service could sometimes 4229 pick more intro points than configured. Fixes bug 31548; bugfix 4230 on 0.3.2.1-alpha. 4231 4232 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha): 4233 - Add a "--list-modules" command to print a list of which compile- 4234 time modules are enabled. Closes ticket 30452. 4235 4236 o Minor features (continuous integration, backport from 0.4.1.1-alpha): 4237 - Remove sudo configuration lines from .travis.yml as they are no 4238 longer needed with current Travis build environment. Resolves 4239 issue 30213. 4240 4241 o Minor features (continuous integration, backport from 0.4.1.4-rc): 4242 - Our Travis configuration now uses Chutney to run some network 4243 integration tests automatically. Closes ticket 29280. 4244 4245 o Minor features (continuous integration, backport from 0.4.2.2-alpha): 4246 - When building on Appveyor and Travis, pass the "-k" flag to make, 4247 so that we are informed of all compilation failures, not just the 4248 first one or two. Closes ticket 31372. 4249 4250 o Minor features (fallback directory list, backport from 0.4.1.4-rc): 4251 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc 4252 in December 2018 (of which ~122 were still functional), with a 4253 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated 4254 in June 2019. Closes ticket 28795. 4255 4256 o Minor features (geoip, backport from 0.4.2.5): 4257 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 4258 Country database. Closes ticket 32685. 4259 4260 o Minor features (stem tests, backport from 0.4.2.1-alpha): 4261 - Change "make test-stem" so it only runs the stem tests that use 4262 tor. This change makes test-stem faster and more reliable. Closes 4263 ticket 31554. 4264 4265 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): 4266 - Avoid spurious errors when Appveyor CI fails before the install step. 4267 Fixes bug 31884; bugfix on 0.3.4.2-alpha. 4268 4269 o Minor bugfixes (build system, backport form 0.4.2.1-alpha): 4270 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows 4271 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. 4272 4273 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha): 4274 - Fix a logic error that prevented the SessionGroup sub-option from 4275 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha. 4276 4277 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc): 4278 - On relays, properly check that a padding machine is absent before 4279 logging a warning about it being absent. Fixes bug 30649; bugfix 4280 on 0.4.0.1-alpha. 4281 4282 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): 4283 - Fix a BUG() assertion that occurs within a very small race window 4284 between when a client intro circuit opens and when its descriptor 4285 gets cleaned up from the cache. The circuit is now closed early, 4286 which will trigger a re-fetch of the descriptor and continue the 4287 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. 4288 4289 o Minor bugfixes (clock skew detection, backport from 0.4.1.5): 4290 - Don't believe clock skew results from NETINFO cells that appear to 4291 arrive before we sent the VERSIONS cells they are responding to. 4292 Previously, we would accept them up to 3 minutes "in the past". 4293 Fixes bug 31343; bugfix on 0.2.4.4-alpha. 4294 4295 o Minor bugfixes (compilation warning, backport from 0.4.1.5): 4296 - Fix a compilation warning on Windows about casting a function 4297 pointer for GetTickCount64(). Fixes bug 31374; bugfix 4298 on 0.2.9.1-alpha. 4299 4300 o Minor bugfixes (compilation, backport from 0.4.1.5): 4301 - Avoid using labs() on time_t, which can cause compilation warnings 4302 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha. 4303 4304 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha): 4305 - Suppress spurious float-conversion warnings from GCC when calling 4306 floating-point classifier functions on FreeBSD. Fixes part of bug 4307 31687; bugfix on 0.3.1.5-alpha. 4308 4309 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha): 4310 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option 4311 due to missing declarations of abort(), and prevent other such 4312 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha. 4313 4314 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha): 4315 - Fix a bug that prevented us from supporting SOCKS5 proxies that 4316 want authentication along with configured (but unused!) 4317 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha. 4318 4319 o Minor bugfixes (connections, backport from 0.4.2.3-rc): 4320 - Avoid trying to read data from closed connections, which can cause 4321 needless loops in Libevent and infinite loops in Shadow. Fixes bug 4322 30344; bugfix on 0.1.1.1-alpha. 4323 4324 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha): 4325 - Allow the test-stem job to fail in Travis, because it sometimes 4326 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha. 4327 - Skip test_rebind on macOS in Travis, because it is unreliable on 4328 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 4329 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment 4330 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 4331 4332 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc): 4333 - Avoid a set of possible code paths that could try to use freed 4334 memory in routerlist_free() while Tor was exiting. Fixes bug 4335 31003; bugfix on 0.1.2.2-alpha. 4336 4337 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha): 4338 - Stop crashing after parsing an unknown descriptor purpose 4339 annotation. We think this bug can only be triggered by modifying a 4340 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha. 4341 4342 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha): 4343 - Move the "bandwidth-file-headers" line in directory authority 4344 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix 4345 on 0.3.5.1-alpha. 4346 4347 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): 4348 - On abort, try harder to flush the output buffers of log messages. 4349 On some platforms (macOS), log messages could be discarded when 4350 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4351 - Report the tor version whenever an assertion fails. Previously, we 4352 only reported the Tor version on some crashes, and some non-fatal 4353 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4354 4355 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha): 4356 - When extracting an IPv6 address from a PF-based proxy, verify that 4357 we are actually configured to receive an IPv6 address, and log an 4358 internal error if not. Fixes part of bug 31687; bugfix 4359 on 0.2.3.4-alpha. 4360 4361 o Minor bugfixes (guards, backport from 0.4.2.1-alpha): 4362 - When tor is missing descriptors for some primary entry guards, 4363 make the log message less alarming. It's normal for descriptors to 4364 expire, as long as tor fetches new ones soon after. Fixes bug 4365 31657; bugfix on 0.3.3.1-alpha. 4366 4367 o Minor bugfixes (logging, backport from 0.4.1.1-alpha): 4368 - Do not log a warning when running with an OpenSSL version other 4369 than the one Tor was compiled with, if the two versions should be 4370 compatible. Previously, we would warn whenever the version was 4371 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha. 4372 4373 o Minor bugfixes (logging, backport from 0.4.2.1-alpha): 4374 - Change log level of message "Hash of session info was not as 4375 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix 4376 on 0.1.1.10-alpha. 4377 4378 o Minor bugfixes (logging, backport from 0.4.2.2-alpha): 4379 - Rate-limit our the logging message about the obsolete .exit 4380 notation. Previously, there was no limit on this warning, which 4381 could potentially be triggered many times by a hostile website. 4382 Fixes bug 31466; bugfix on 0.2.2.1-alpha. 4383 4384 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): 4385 - Do not log a nonfatal assertion failure when receiving a VERSIONS 4386 cell on a connection using the obsolete v1 link protocol. Log a 4387 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. 4388 4389 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): 4390 - Reset the periodic events' "enabled" flag when Tor is shut down 4391 cleanly. Previously, this flag was left on, which caused periodic 4392 events not to be re-enabled when Tor was relaunched in-process 4393 with tor_api.h after a shutdown. Fixes bug 32058; bugfix 4394 on 0.3.3.1-alpha. 4395 4396 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha): 4397 - Avoid a minor memory leak that could occur on relays when failing 4398 to create a "keys" directory. Fixes bug 30148; bugfix 4399 on 0.3.3.1-alpha. 4400 4401 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc): 4402 - Fix a trivial memory leak when parsing an invalid value 4403 from a download schedule in the configuration. Fixes bug 4404 30894; bugfix on 0.3.4.1-alpha. 4405 4406 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha): 4407 - Fix usage of minherit() on NetBSD and other platforms that define 4408 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug 4409 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell. 4410 4411 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha): 4412 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc 4413 implemenation) when failing to load an onion service client 4414 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha. 4415 4416 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha): 4417 - When purging the DNS cache because of an out-of-memory condition, 4418 try purging just the older entries at first. Previously, we would 4419 always purge the whole thing. Fixes bug 29617; bugfix 4420 on 0.3.5.1-alpha. 4421 4422 o Minor bugfixes (portability, backport from 0.4.1.2-alpha): 4423 - Avoid crashing in our tor_vasprintf() implementation on systems 4424 that define neither vasprintf() nor _vscprintf(). (This bug has 4425 been here long enough that we question whether people are running 4426 Tor on such systems, but we're applying the fix out of caution.) 4427 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by 4428 Tobias Stoeckmann. 4429 4430 o Minor bugfixes (process management, backport from 0.4.2.3-alpha): 4431 - Remove overly strict assertions that triggered when a pluggable 4432 transport failed to launch. Fixes bug 31091; bugfix 4433 on 0.4.0.1-alpha. 4434 - Remove an assertion in the Unix process backend. This assertion 4435 would trigger when we failed to find the executable for a child 4436 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. 4437 4438 o Minor bugfixes (relay, backport from 0.4.2.2-alpha): 4439 - Avoid crashing when starting with a corrupt keys directory where 4440 the old ntor key and the new ntor key are identical. Fixes bug 4441 30916; bugfix on 0.2.4.8-alpha. 4442 4443 o Minor bugfixes (rust, backport from 0.4.2.1-alpha): 4444 - Correctly exclude a redundant rust build job in Travis. Fixes bug 4445 31463; bugfix on 0.3.5.4-alpha. 4446 4447 o Minor bugfixes (testing, backport from 0.4.2.3-alpha): 4448 - When testing port rebinding, don't busy-wait for tor to log. 4449 Instead, actually sleep for a short time before polling again. 4450 Also improve the formatting of control commands and log messages. 4451 Fixes bug 31837; bugfix on 0.3.5.1-alpha. 4452 4453 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): 4454 - Log bugs about the TLS read buffer's length only once, rather than 4455 filling the logs with similar warnings. Fixes bug 31939; bugfix 4456 on 0.3.0.4-rc. 4457 4458 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha): 4459 - Always retry v2 single onion service intro and rend circuits with 4460 a 3-hop path. Previously, v2 single onion services used a 3-hop 4461 path when rendezvous circuits were retried after a remote or 4462 delayed failure, but a 1-hop path for immediate retries. Fixes bug 4463 23818; bugfix on 0.2.9.3-alpha. 4464 - Make v3 single onion services fall back to a 3-hop intro, when all 4465 intro points are unreachable via a 1-hop path. Previously, v3 4466 single onion services failed when all intro nodes were unreachable 4467 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. 4468 4469 o Documentation (backport from 0.4.2.1-alpha): 4470 - Use RFC 2397 data URL scheme to embed an image into tor-exit- 4471 notice.html so that operators no longer have to host it 4472 themselves. Closes ticket 31089. 4473 4474 o Testing (backport from 0.4.1.2-alpha): 4475 - Specify torrc paths (with empty files) when launching tor in 4476 integration tests; refrain from reading user and system torrcs. 4477 Resolves issue 29702. 4478 4479 o Testing (continuous integration, backport from 0.4.1.1-alpha): 4480 - In Travis, show stem's tor log after failure. Closes ticket 30234. 4481 4482 o Testing (continuous integration, backport from 0.4.1.5): 4483 - In Travis, make stem log a controller trace to the console, and 4484 tail stem's tor log after failure. Closes ticket 30591. 4485 - In Travis, only run the stem tests that use a tor binary. Closes 4486 ticket 30694. 4487 4488 o Testing (continuous integration, backport from 0.4.2.3-alpha): 4489 - Disable all but one Travis CI macOS build, to mitigate slow 4490 scheduling of Travis macOS jobs. Closes ticket 32177. 4491 - Run the chutney IPv6 networks as part of Travis CI. Closes 4492 ticket 30860. 4493 - Simplify the Travis CI build matrix, and optimise for build time. 4494 Closes ticket 31859. 4495 - Use Windows Server 2019 instead of Windows Server 2016 in our 4496 Appveyor builds. Closes ticket 32086. 4497 4498 o Testing (continuous integration, backport from 0.4.2.4-rc): 4499 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a 4500 recent version of coccinelle. But leave chutney on Ubuntu Trusty, 4501 until we can fix some Bionic permissions issues (see ticket 4502 32240). Related to ticket 31919. 4503 - Install the mingw OpenSSL package in Appveyor. This makes sure 4504 that the OpenSSL headers and libraries match in Tor's Appveyor 4505 builds. (This bug was triggered by an Appveyor image update.) 4506 Fixes bug 32449; bugfix on 0.3.5.6-rc. 4507 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. 4508 4509 o Testing (continuous integration, backport from 0.4.2.5): 4510 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc 4511 extensions. Also activates clang's -Wtypedef-redefinition warnings. 4512 Build some jobs with -std=gnu99, and some jobs without. 4513 Closes ticket 32500. 4514 4515Changes in version 0.3.5.9 - 2019-12-09 4516 Tor 0.3.5.9 backports serveral fixes from later releases, including 4517 several that affect bridge users, relay stability, onion services, 4518 and much more. 4519 4520 o Directory authority changes (backport from 0.4.1.5): 4521 - The directory authority "dizum" has a new IP address. Closes 4522 ticket 31406. 4523 4524 o Major bugfixes (bridges, backport from 0.4.1.2-alpha): 4525 - Consider our directory information to have changed when our list 4526 of bridges changes. Previously, Tor would not re-compute the 4527 status of its directory information when bridges changed, and 4528 therefore would not realize that it was no longer able to build 4529 circuits. Fixes part of bug 29875. 4530 - Do not count previously configured working bridges towards our 4531 total of working bridges. Previously, when Tor's list of bridges 4532 changed, it would think that the old bridges were still usable, 4533 and delay fetching router descriptors for the new ones. Fixes part 4534 of bug 29875; bugfix on 0.3.0.1-alpha. 4535 4536 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc): 4537 - When considering upgrading circuits from "waiting for guard" to 4538 "open", always ignore circuits that are marked for close. Otherwise, 4539 we can end up in the situation where a subsystem is notified that 4540 a closing circuit has just opened, leading to undesirable 4541 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. 4542 4543 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc): 4544 - When running with NSS, disable TLS 1.2 ciphersuites that use 4545 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for 4546 these ciphersuites don't work -- which caused relays to fail to 4547 handshake with one another when these ciphersuites were enabled. 4548 Fixes bug 29241; bugfix on 0.3.5.1-alpha. 4549 4550 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha): 4551 - Properly clean up the introduction point map when circuits change 4552 purpose from onion service circuits to pathbias, measurement, or 4553 other circuit types. This should fix some service-side instances 4554 of introduction point failure. Fixes bug 29034; bugfix 4555 on 0.3.2.1-alpha. 4556 4557 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha): 4558 - Fix an unreachable bug in which an introduction point could try to 4559 send an INTRODUCE_ACK with a status code that Trunnel would refuse 4560 to encode, leading the relay to assert(). We've consolidated the 4561 ABI values into Trunnel now. Fixes bug 30454; bugfix 4562 on 0.3.0.1-alpha. 4563 - Clients can now handle unknown status codes from INTRODUCE_ACK 4564 cells. (The NACK behavior will stay the same.) This will allow us 4565 to extend status codes in the future without breaking the normal 4566 client behavior. Fixes another part of bug 30454; bugfix 4567 on 0.3.0.1-alpha. 4568 4569 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha): 4570 - Stop ignoring torrc options after an %include directive, when the 4571 included directory ends with a file that does not contain any 4572 config options (but does contain comments or whitespace). Fixes 4573 bug 31408; bugfix on 0.3.1.1-alpha. 4574 4575 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha): 4576 - Onion services now always use the exact number of intro points 4577 configured with the HiddenServiceNumIntroductionPoints option (or 4578 fewer if nodes are excluded). Before, a service could sometimes 4579 pick more intro points than configured. Fixes bug 31548; bugfix 4580 on 0.3.2.1-alpha. 4581 4582 o Minor features (address selection, backport from 0.4.0.3-alpha): 4583 - Treat the subnet 100.64.0.0/10 as public for some purposes; 4584 private for others. This subnet is the RFC 6598 (Carrier Grade 4585 NAT) IP range, and is deployed by many ISPs as an alternative to 4586 RFC 1918 that does not break existing internal networks. Tor now 4587 blocks SOCKS and control ports on these addresses and warns users 4588 if client ports or ExtORPorts are listening on a RFC 6598 address. 4589 Closes ticket 28525. Patch by Neel Chauhan. 4590 4591 o Minor features (bandwidth authority, backport from 0.4.0.4-rc): 4592 - Make bandwidth authorities ignore relays that are reported in the 4593 bandwidth file with the flag "vote=0". This change allows us to 4594 report unmeasured relays for diagnostic reasons without including 4595 their bandwidth in the bandwidth authorities' vote. Closes 4596 ticket 29806. 4597 4598 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha): 4599 - Add a "--list-modules" command to print a list of which compile- 4600 time modules are enabled. Closes ticket 30452. 4601 4602 o Minor features (continuous integration, backport from 0.4.0.4-rc): 4603 - On Travis Rust builds, cleanup Rust registry and refrain from 4604 caching the "target/" directory to speed up builds. Resolves 4605 issue 29962. 4606 4607 o Minor features (continuous integration, backport from 0.4.0.5): 4608 - In Travis, tell timelimit to use stem's backtrace signals, and 4609 launch python directly from timelimit, so python receives the 4610 signals from timelimit, rather than make. Closes ticket 30117. 4611 4612 o Minor features (continuous integration, backport from 0.4.1.1-alpha): 4613 - Remove sudo configuration lines from .travis.yml as they are no 4614 longer needed with current Travis build environment. Resolves 4615 issue 30213. 4616 4617 o Minor features (continuous integration, backport from 0.4.1.4-rc): 4618 - Our Travis configuration now uses Chutney to run some network 4619 integration tests automatically. Closes ticket 29280. 4620 4621 o Minor features (continuous integration, backport from 0.4.2.2-alpha): 4622 - When building on Appveyor and Travis, pass the "-k" flag to make, 4623 so that we are informed of all compilation failures, not just the 4624 first one or two. Closes ticket 31372. 4625 4626 o Minor features (fallback directory list, backport from 0.4.1.4-rc): 4627 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc 4628 in December 2018 (of which ~122 were still functional), with a 4629 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated 4630 in June 2019. Closes ticket 28795. 4631 4632 o Minor features (geoip, backport from 0.4.2.5): 4633 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2 4634 Country database. Closes ticket 32685. 4635 4636 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc): 4637 - Try to log an error from NSS (if there is any) and a more useful 4638 description of our situation if we are using NSS and a call to 4639 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241. 4640 4641 o Minor features (stem tests, backport from 0.4.2.1-alpha): 4642 - Change "make test-stem" so it only runs the stem tests that use 4643 tor. This change makes test-stem faster and more reliable. Closes 4644 ticket 31554. 4645 4646 o Minor bugfixes (security, backport from 0.4.0.4-rc): 4647 - Verify in more places that we are not about to create a buffer 4648 with more than INT_MAX bytes, to avoid possible OOB access in the 4649 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and 4650 fixed by Tobias Stoeckmann. 4651 - Fix a potential double free bug when reading huge bandwidth files. 4652 The issue is not exploitable in the current Tor network because 4653 the vulnerable code is only reached when directory authorities 4654 read bandwidth files, but bandwidth files come from a trusted 4655 source (usually the authorities themselves). Furthermore, the 4656 issue is only exploitable in rare (non-POSIX) 32-bit architectures, 4657 which are not used by any of the current authorities. Fixes bug 4658 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by 4659 Tobias Stoeckmann. 4660 4661 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc): 4662 - Reset coverage state on disk after Travis CI has finished. This 4663 should prevent future coverage merge errors from causing the test 4664 suite for the "process" subsystem to fail. The process subsystem 4665 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix 4666 on 0.2.9.15. 4667 - Terminate test-stem if it takes more than 9.5 minutes to run. 4668 (Travis terminates the job after 10 minutes of no output.) 4669 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha. 4670 4671 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha): 4672 - Avoid spurious errors when Appveyor CI fails before the install step. 4673 Fixes bug 31884; bugfix on 0.3.4.2-alpha. 4674 4675 o Minor bugfixes (build system, backport form 0.4.2.1-alpha): 4676 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows 4677 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. 4678 4679 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc): 4680 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug 4681 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning 4682 CID 1444119. 4683 4684 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha): 4685 - Fix a logic error that prevented the SessionGroup sub-option from 4686 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha. 4687 4688 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc): 4689 - Fix a BUG() assertion that occurs within a very small race window 4690 between when a client intro circuit opens and when its descriptor 4691 gets cleaned up from the cache. The circuit is now closed early, 4692 which will trigger a re-fetch of the descriptor and continue the 4693 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. 4694 4695 o Minor bugfixes (clock skew detection, backport from 0.4.1.5): 4696 - Don't believe clock skew results from NETINFO cells that appear to 4697 arrive before we sent the VERSIONS cells they are responding to. 4698 Previously, we would accept them up to 3 minutes "in the past". 4699 Fixes bug 31343; bugfix on 0.2.4.4-alpha. 4700 4701 o Minor bugfixes (compilation warning, backport from 0.4.1.5): 4702 - Fix a compilation warning on Windows about casting a function 4703 pointer for GetTickCount64(). Fixes bug 31374; bugfix 4704 on 0.2.9.1-alpha. 4705 4706 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha): 4707 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug 4708 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn. 4709 4710 o Minor bugfixes (compilation, backport from 0.4.1.5): 4711 - Avoid using labs() on time_t, which can cause compilation warnings 4712 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha. 4713 4714 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha): 4715 - Suppress spurious float-conversion warnings from GCC when calling 4716 floating-point classifier functions on FreeBSD. Fixes part of bug 4717 31687; bugfix on 0.3.1.5-alpha. 4718 4719 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha): 4720 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option 4721 due to missing declarations of abort(), and prevent other such 4722 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha. 4723 4724 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha): 4725 - Fix a bug that prevented us from supporting SOCKS5 proxies that 4726 want authentication along with configured (but unused!) 4727 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha. 4728 4729 o Minor bugfixes (connections, backport from 0.4.2.3-rc): 4730 - Avoid trying to read data from closed connections, which can cause 4731 needless loops in Libevent and infinite loops in Shadow. Fixes bug 4732 30344; bugfix on 0.1.1.1-alpha. 4733 4734 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha): 4735 - Allow the test-stem job to fail in Travis, because it sometimes 4736 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha. 4737 - Skip test_rebind on macOS in Travis, because it is unreliable on 4738 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 4739 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment 4740 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 4741 4742 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc): 4743 - Avoid a set of possible code paths that could try to use freed 4744 memory in routerlist_free() while Tor was exiting. Fixes bug 4745 31003; bugfix on 0.1.2.2-alpha. 4746 4747 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha): 4748 - Stop crashing after parsing an unknown descriptor purpose 4749 annotation. We think this bug can only be triggered by modifying a 4750 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha. 4751 4752 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha): 4753 - Move the "bandwidth-file-headers" line in directory authority 4754 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix 4755 on 0.3.5.1-alpha. 4756 4757 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha): 4758 - On abort, try harder to flush the output buffers of log messages. 4759 On some platforms (macOS), log messages could be discarded when 4760 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4761 - Report the tor version whenever an assertion fails. Previously, we 4762 only reported the Tor version on some crashes, and some non-fatal 4763 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 4764 4765 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha): 4766 - When extracting an IPv6 address from a PF-based proxy, verify that 4767 we are actually configured to receive an IPv6 address, and log an 4768 internal error if not. Fixes part of bug 31687; bugfix 4769 on 0.2.3.4-alpha. 4770 4771 o Minor bugfixes (guards, backport from 0.4.2.1-alpha): 4772 - When tor is missing descriptors for some primary entry guards, 4773 make the log message less alarming. It's normal for descriptors to 4774 expire, as long as tor fetches new ones soon after. Fixes bug 4775 31657; bugfix on 0.3.3.1-alpha. 4776 4777 o Minor bugfixes (logging, backport from 0.4.0.2-alpha): 4778 - Avoid logging that we are relaxing a circuit timeout when that 4779 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha. 4780 4781 o Minor bugfixes (logging, backport from 0.4.0.3-alpha): 4782 - Correct a misleading error message when IPv4Only or IPv6Only is 4783 used but the resolved address can not be interpreted as an address 4784 of the specified IP version. Fixes bug 13221; bugfix on 4785 0.2.3.9-alpha. Patch from Kris Katterjohn. 4786 - Log the correct port number for listening sockets when "auto" is 4787 used to let Tor pick the port number. Previously, port 0 was 4788 logged instead of the actual port number. Fixes bug 29144; bugfix 4789 on 0.3.5.1-alpha. Patch from Kris Katterjohn. 4790 - Stop logging a BUG() warning when Tor is waiting for exit 4791 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha. 4792 4793 o Minor bugfixes (logging, backport from 0.4.1.1-alpha): 4794 - Do not log a warning when running with an OpenSSL version other 4795 than the one Tor was compiled with, if the two versions should be 4796 compatible. Previously, we would warn whenever the version was 4797 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha. 4798 4799 o Minor bugfixes (logging, backport from 0.4.2.1-alpha): 4800 - Change log level of message "Hash of session info was not as 4801 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix 4802 on 0.1.1.10-alpha. 4803 4804 o Minor bugfixes (logging, backport from 0.4.2.2-alpha): 4805 - Rate-limit our the logging message about the obsolete .exit 4806 notation. Previously, there was no limit on this warning, which 4807 could potentially be triggered many times by a hostile website. 4808 Fixes bug 31466; bugfix on 0.2.2.1-alpha. 4809 4810 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha): 4811 - Do not log a nonfatal assertion failure when receiving a VERSIONS 4812 cell on a connection using the obsolete v1 link protocol. Log a 4813 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. 4814 4815 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha): 4816 - Reset the periodic events' "enabled" flag when Tor is shut down 4817 cleanly. Previously, this flag was left on, which caused periodic 4818 events not to be re-enabled when Tor was relaunched in-process 4819 with tor_api.h after a shutdown. Fixes bug 32058; bugfix 4820 on 0.3.3.1-alpha. 4821 4822 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha): 4823 - Avoid a minor memory leak that could occur on relays when failing 4824 to create a "keys" directory. Fixes bug 30148; bugfix 4825 on 0.3.3.1-alpha. 4826 4827 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc): 4828 - Fix a trivial memory leak when parsing an invalid value 4829 from a download schedule in the configuration. Fixes bug 4830 30894; bugfix on 0.3.4.1-alpha. 4831 4832 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha): 4833 - Refactor the shared random state's memory management so that it 4834 actually takes ownership of the shared random value pointers. 4835 Fixes bug 29706; bugfix on 0.2.9.1-alpha. 4836 4837 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha): 4838 - Stop leaking parts of the shared random state in the shared-random 4839 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha. 4840 4841 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha): 4842 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc 4843 implemenation) when failing to load an onion service client 4844 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha. 4845 4846 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha): 4847 - When purging the DNS cache because of an out-of-memory condition, 4848 try purging just the older entries at first. Previously, we would 4849 always purge the whole thing. Fixes bug 29617; bugfix 4850 on 0.3.5.1-alpha. 4851 4852 o Minor bugfixes (portability, backport from 0.4.1.2-alpha): 4853 - Avoid crashing in our tor_vasprintf() implementation on systems 4854 that define neither vasprintf() nor _vscprintf(). (This bug has 4855 been here long enough that we question whether people are running 4856 Tor on such systems, but we're applying the fix out of caution.) 4857 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by 4858 Tobias Stoeckmann. 4859 4860 o Minor bugfixes (relay, backport from 0.4.2.2-alpha): 4861 - Avoid crashing when starting with a corrupt keys directory where 4862 the old ntor key and the new ntor key are identical. Fixes bug 4863 30916; bugfix on 0.2.4.8-alpha. 4864 4865 o Minor bugfixes (rust, backport from 0.4.0.5): 4866 - Abort on panic in all build profiles, instead of potentially 4867 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha. 4868 4869 o Minor bugfixes (rust, backport from 0.4.2.1-alpha): 4870 - Correctly exclude a redundant rust build job in Travis. Fixes bug 4871 31463; bugfix on 0.3.5.4-alpha. 4872 4873 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha): 4874 - Allow connections to single onion services to remain idle without 4875 being disconnected. Previously, relays acting as rendezvous points 4876 for single onion services were mistakenly closing idle rendezvous 4877 circuits after 60 seconds, thinking that they were unused 4878 directory-fetching circuits that had served their purpose. Fixes 4879 bug 29665; bugfix on 0.2.1.26. 4880 4881 o Minor bugfixes (stats, backport from 0.4.0.3-alpha): 4882 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in 4883 relay and bridge extra-info documents. Fixes bug 29017; bugfix 4884 on 0.3.1.1-alpha. 4885 4886 o Minor bugfixes (testing, backport from 0.4.0.3-alpha): 4887 - Downgrade some LOG_ERR messages in the address/* tests to 4888 warnings. The LOG_ERR messages were occurring when we had no 4889 configured network. We were failing the unit tests, because we 4890 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug 4891 29530; bugfix on 0.3.5.8. 4892 - Fix our gcov wrapper script to look for object files at the 4893 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha. 4894 4895 o Minor bugfixes (testing, backport from 0.4.0.4-rc): 4896 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a 4897 recent test-network.sh to use new chutney features in CI. Fixes 4898 bug 29703; bugfix on 0.2.9.1-alpha. 4899 - Fix a test failure on Windows caused by an unexpected "BUG" 4900 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix 4901 on 0.2.9.3-alpha. 4902 4903 o Minor bugfixes (testing, backport from 0.4.2.3-alpha): 4904 - When testing port rebinding, don't busy-wait for tor to log. 4905 Instead, actually sleep for a short time before polling again. 4906 Also improve the formatting of control commands and log messages. 4907 Fixes bug 31837; bugfix on 0.3.5.1-alpha. 4908 4909 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc): 4910 - When classifying a client's selection of TLS ciphers, if the 4911 client ciphers are not yet available, do not cache the result. 4912 Previously, we had cached the unavailability of the cipher list 4913 and never looked again, which in turn led us to assume that the 4914 client only supported the ancient V1 link protocol. This, in turn, 4915 was causing Stem integration tests to stall in some cases. Fixes 4916 bug 30021; bugfix on 0.2.4.8-alpha. 4917 4918 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha): 4919 - Log bugs about the TLS read buffer's length only once, rather than 4920 filling the logs with similar warnings. Fixes bug 31939; bugfix 4921 on 0.3.0.4-rc. 4922 4923 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha): 4924 - Always retry v2 single onion service intro and rend circuits with 4925 a 3-hop path. Previously, v2 single onion services used a 3-hop 4926 path when rendezvous circuits were retried after a remote or 4927 delayed failure, but a 1-hop path for immediate retries. Fixes bug 4928 23818; bugfix on 0.2.9.3-alpha. 4929 - Make v3 single onion services fall back to a 3-hop intro, when all 4930 intro points are unreachable via a 1-hop path. Previously, v3 4931 single onion services failed when all intro nodes were unreachable 4932 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. 4933 4934 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha): 4935 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit 4936 Windows Server 2012 R2 job. The remaining 2 jobs still provide 4937 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set 4938 fast_finish, so failed jobs terminate the build immediately. Fixes 4939 bug 29601; bugfix on 0.3.5.4-alpha. 4940 4941 o Documentation (backport from 0.4.2.1-alpha): 4942 - Use RFC 2397 data URL scheme to embed an image into tor-exit- 4943 notice.html so that operators no longer have to host it 4944 themselves. Closes ticket 31089. 4945 4946 o Testing (backport from 0.4.1.2-alpha): 4947 - Specify torrc paths (with empty files) when launching tor in 4948 integration tests; refrain from reading user and system torrcs. 4949 Resolves issue 29702. 4950 4951 o Testing (continuous integration, backport from 0.4.1.1-alpha): 4952 - In Travis, show stem's tor log after failure. Closes ticket 30234. 4953 4954 o Testing (continuous integration, backport from 0.4.1.5): 4955 - In Travis, make stem log a controller trace to the console, and 4956 tail stem's tor log after failure. Closes ticket 30591. 4957 - In Travis, only run the stem tests that use a tor binary. Closes 4958 ticket 30694. 4959 4960 o Testing (continuous integration, backport from 0.4.2.3-alpha): 4961 - Disable all but one Travis CI macOS build, to mitigate slow 4962 scheduling of Travis macOS jobs. Closes ticket 32177. 4963 - Run the chutney IPv6 networks as part of Travis CI. Closes 4964 ticket 30860. 4965 - Simplify the Travis CI build matrix, and optimise for build time. 4966 Closes ticket 31859. 4967 - Use Windows Server 2019 instead of Windows Server 2016 in our 4968 Appveyor builds. Closes ticket 32086. 4969 4970 o Testing (continuous integration, backport from 0.4.2.4-rc): 4971 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a 4972 recent version of coccinelle. But leave chutney on Ubuntu Trusty, 4973 until we can fix some Bionic permissions issues (see ticket 4974 32240). Related to ticket 31919. 4975 - Install the mingw OpenSSL package in Appveyor. This makes sure 4976 that the OpenSSL headers and libraries match in Tor's Appveyor 4977 builds. (This bug was triggered by an Appveyor image update.) 4978 Fixes bug 32449; bugfix on 0.3.5.6-rc. 4979 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. 4980 4981 o Testing (continuous integration, backport from 0.4.2.5): 4982 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc 4983 extensions. Also activates clang's -Wtypedef-redefinition warnings. 4984 Build some jobs with -std=gnu99, and some jobs without. 4985 Closes ticket 32500. 4986 4987Changes in version 0.4.2.4-rc - 2019-11-15 4988 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes 4989 several bugs from earlier versions, including a few that would result in 4990 stack traces or incorrect behavior. 4991 4992 o Minor features (build system): 4993 - Make pkg-config use --prefix when cross-compiling, if 4994 PKG_CONFIG_PATH is not set. Closes ticket 32191. 4995 4996 o Minor features (geoip): 4997 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2 4998 Country database. Closes ticket 32440. 4999 5000 o Minor bugfixes (client, onion service v3): 5001 - Fix a BUG() assertion that occurs within a very small race window 5002 between when a client intro circuit opens and when its descriptor 5003 gets cleaned up from the cache. The circuit is now closed early, 5004 which will trigger a re-fetch of the descriptor and continue the 5005 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha. 5006 5007 o Minor bugfixes (code quality): 5008 - Fix "make check-includes" so it runs correctly on out-of-tree 5009 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha. 5010 5011 o Minor bugfixes (configuration): 5012 - Log the option name when skipping an obsolete option. Fixes bug 5013 32295; bugfix on 0.4.2.1-alpha. 5014 5015 o Minor bugfixes (crash): 5016 - When running Tor with an option like --verify-config or 5017 --dump-config that does not start the event loop, avoid crashing 5018 if we try to exit early because of an error. Fixes bug 32407; 5019 bugfix on 0.3.3.1-alpha. 5020 5021 o Minor bugfixes (directory): 5022 - When checking if a directory connection is anonymous, test if the 5023 circuit was marked for close before looking at its channel. This 5024 avoids a BUG() stacktrace if the circuit was previously closed. 5025 Fixes bug 31958; bugfix on 0.4.2.1-alpha. 5026 5027 o Minor bugfixes (shellcheck): 5028 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug 5029 32402; bugfix on 0.4.2.1-alpha. 5030 - Start checking most scripts for shellcheck errors again. Fixes bug 5031 32402; bugfix on 0.4.2.1-alpha. 5032 5033 o Testing (continuous integration): 5034 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a 5035 recent version of coccinelle. But leave chutney on Ubuntu Trusty, 5036 until we can fix some Bionic permissions issues (see ticket 5037 32240). Related to ticket 31919. 5038 - Install the mingw OpenSSL package in Appveyor. This makes sure 5039 that the OpenSSL headers and libraries match in Tor's Appveyor 5040 builds. (This bug was triggered by an Appveyor image update.) 5041 Fixes bug 32449; bugfix on 0.3.5.6-rc. 5042 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241. 5043 5044 5045Changes in version 0.4.2.3-alpha - 2019-10-24 5046 This release fixes several bugs from the previous alpha release, and 5047 from earlier versions of Tor. 5048 5049 o Major bugfixes (relay): 5050 - Relays now respect their AccountingMax bandwidth again. When 5051 relays entered "soft" hibernation (which typically starts when 5052 we've hit 90% of our AccountingMax), we had stopped checking 5053 whether we should enter hard hibernation. Soft hibernation refuses 5054 new connections and new circuits, but the existing circuits can 5055 continue, meaning that relays could have exceeded their configured 5056 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha. 5057 5058 o Major bugfixes (v3 onion services): 5059 - Onion services now always use the exact number of intro points 5060 configured with the HiddenServiceNumIntroductionPoints option (or 5061 fewer if nodes are excluded). Before, a service could sometimes 5062 pick more intro points than configured. Fixes bug 31548; bugfix 5063 on 0.3.2.1-alpha. 5064 5065 o Minor feature (onion services, control port): 5066 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3 5067 (v3) onion services. Previously it defaulted to RSA1024 (v2). 5068 Closes ticket 29669. 5069 5070 o Minor features (testing): 5071 - When running tests that attempt to look up hostnames, replace the 5072 libc name lookup functions with ones that do not actually touch 5073 the network. This way, the tests complete more quickly in the 5074 presence of a slow or missing DNS resolver. Closes ticket 31841. 5075 5076 o Minor features (testing, continuous integration): 5077 - Disable all but one Travis CI macOS build, to mitigate slow 5078 scheduling of Travis macOS jobs. Closes ticket 32177. 5079 - Run the chutney IPv6 networks as part of Travis CI. Closes 5080 ticket 30860. 5081 - Simplify the Travis CI build matrix, and optimise for build time. 5082 Closes ticket 31859. 5083 - Use Windows Server 2019 instead of Windows Server 2016 in our 5084 Appveyor builds. Closes ticket 32086. 5085 5086 o Minor bugfixes (build system): 5087 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug 5088 32124; bugfix on 0.3.4.1-alpha. 5089 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix 5090 on 0.2.0.20-rc. 5091 - Stop failing when jemalloc is requested, but tcmalloc is not 5092 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha. 5093 - When pkg-config is not installed, or a library that depends on 5094 pkg-config is not found, tell the user what to do to fix the 5095 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha. 5096 5097 o Minor bugfixes (connections): 5098 - Avoid trying to read data from closed connections, which can cause 5099 needless loops in Libevent and infinite loops in Shadow. Fixes bug 5100 30344; bugfix on 0.1.1.1-alpha. 5101 5102 o Minor bugfixes (error handling): 5103 - Always lock the backtrace buffer before it is used. Fixes bug 5104 31734; bugfix on 0.2.5.3-alpha. 5105 5106 o Minor bugfixes (mainloop, periodic events, in-process API): 5107 - Reset the periodic events' "enabled" flag when Tor is shut down 5108 cleanly. Previously, this flag was left on, which caused periodic 5109 events not to be re-enabled when Tor was relaunched in-process 5110 with tor_api.h after a shutdown. Fixes bug 32058; bugfix 5111 on 0.3.3.1-alpha. 5112 5113 o Minor bugfixes (process management): 5114 - Remove overly strict assertions that triggered when a pluggable 5115 transport failed to launch. Fixes bug 31091; bugfix 5116 on 0.4.0.1-alpha. 5117 - Remove an assertion in the Unix process backend. This assertion 5118 would trigger when we failed to find the executable for a child 5119 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha. 5120 5121 o Minor bugfixes (testing): 5122 - Avoid intermittent test failures due to a test that had relied on 5123 inconsistent timing sources. Fixes bug 31995; bugfix 5124 on 0.3.1.3-alpha. 5125 - When testing port rebinding, don't busy-wait for tor to log. 5126 Instead, actually sleep for a short time before polling again. 5127 Also improve the formatting of control commands and log messages. 5128 Fixes bug 31837; bugfix on 0.3.5.1-alpha. 5129 5130 o Minor bugfixes (tls, logging): 5131 - Log bugs about the TLS read buffer's length only once, rather than 5132 filling the logs with similar warnings. Fixes bug 31939; bugfix 5133 on 0.3.0.4-rc. 5134 5135 o Minor bugfixes (v3 onion services): 5136 - Fix an implicit conversion from ssize_t to size_t discovered by 5137 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha. 5138 - Fix a memory leak in an unlikely error code path when encoding HS 5139 DoS establish intro extension cell. Fixes bug 32063; bugfix 5140 on 0.4.2.1-alpha. 5141 - When cleaning up intro circuits for a v3 onion service, don't 5142 remove circuits that have an established or pending circuit, even 5143 if they ran out of retries. This way, we don't remove a circuit on 5144 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha. 5145 5146 o Documentation: 5147 - Correct the description of "GuardLifetime". Fixes bug 31189; 5148 bugfix on 0.3.0.1-alpha. 5149 - Make clear in the man page, in both the bandwidth section and the 5150 AccountingMax section, that Tor counts in powers of two, not 5151 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion 5152 bytes. Resolves ticket 32106. 5153 5154 5155Changes in version 0.4.2.2-alpha - 2019-10-07 5156 This release fixes several bugs from the previous alpha release, and 5157 from earlier versions. It also includes a change in authorities, so 5158 that they begin to reject the currently unsupported release series. 5159 5160 o Major features (directory authorities): 5161 - Directory authorities now reject relays running all currently 5162 deprecated release series. The currently supported release series 5163 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549. 5164 5165 o Major bugfixes (embedded Tor): 5166 - Avoid a possible crash when restarting Tor in embedded mode and 5167 enabling a different set of publish/subscribe messages. Fixes bug 5168 31898; bugfix on 0.4.1.1-alpha. 5169 5170 o Major bugfixes (torrc parsing): 5171 - Stop ignoring torrc options after an %include directive, when the 5172 included directory ends with a file that does not contain any 5173 config options (but does contain comments or whitespace). Fixes 5174 bug 31408; bugfix on 0.3.1.1-alpha. 5175 5176 o Minor features (auto-formatting scripts): 5177 - When annotating C macros, never generate a line that our check- 5178 spaces script would reject. Closes ticket 31759. 5179 - When annotating C macros, try to remove cases of double-negation. 5180 Closes ticket 31779. 5181 5182 o Minor features (continuous integration): 5183 - When building on Appveyor and Travis, pass the "-k" flag to make, 5184 so that we are informed of all compilation failures, not just the 5185 first one or two. Closes ticket 31372. 5186 5187 o Minor features (geoip): 5188 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2 5189 Country database. Closes ticket 31931. 5190 5191 o Minor features (maintenance scripts): 5192 - Add a Coccinelle script to detect bugs caused by incrementing or 5193 decrementing a variable inside a call to log_debug(). Since 5194 log_debug() is a macro whose arguments are conditionally 5195 evaluated, it is usually an error to do this. One such bug was 5196 30628, in which SENDME cells were miscounted by a decrement 5197 operator inside a log_debug() call. Closes ticket 30743. 5198 5199 o Minor features (onion services v3): 5200 - Assist users who try to setup v2 client authorization in v3 onion 5201 services by pointing them to the right documentation. Closes 5202 ticket 28966. 5203 5204 o Minor bugfixes (Appveyor continuous integration): 5205 - Avoid spurious errors when Appveyor CI fails before the install 5206 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha. 5207 5208 o Minor bugfixes (best practices tracker): 5209 - When listing overbroad exceptions, do not also list problems, and 5210 do not list insufficiently broad exceptions. Fixes bug 31338; 5211 bugfix on 0.4.2.1-alpha. 5212 5213 o Minor bugfixes (controller protocol): 5214 - Fix the MAPADDRESS controller command to accept one or more 5215 arguments. Previously, it required two or more arguments, and 5216 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha. 5217 5218 o Minor bugfixes (logging): 5219 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code 5220 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha. 5221 - Disable backtrace signal handlers when shutting down tor. Fixes 5222 bug 31614; bugfix on 0.2.5.2-alpha. 5223 - Rate-limit our the logging message about the obsolete .exit 5224 notation. Previously, there was no limit on this warning, which 5225 could potentially be triggered many times by a hostile website. 5226 Fixes bug 31466; bugfix on 0.2.2.1-alpha. 5227 - When initialising log domain masks, only set known log domains. 5228 Fixes bug 31854; bugfix on 0.2.1.1-alpha. 5229 5230 o Minor bugfixes (logging, protocol violations): 5231 - Do not log a nonfatal assertion failure when receiving a VERSIONS 5232 cell on a connection using the obsolete v1 link protocol. Log a 5233 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha. 5234 5235 o Minor bugfixes (modules): 5236 - Explain what the optional Directory Authority module is, and what 5237 happens when it is disabled. Fixes bug 31825; bugfix 5238 on 0.3.4.1-alpha. 5239 5240 o Minor bugfixes (multithreading): 5241 - Avoid some undefined behaviour when freeing mutexes. Fixes bug 5242 31736; bugfix on 0.0.7. 5243 5244 o Minor bugfixes (relay): 5245 - Avoid crashing when starting with a corrupt keys directory where 5246 the old ntor key and the new ntor key are identical. Fixes bug 5247 30916; bugfix on 0.2.4.8-alpha. 5248 5249 o Minor bugfixes (tests, SunOS): 5250 - Avoid a map_anon_nofork test failure due to a signed/unsigned 5251 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha. 5252 5253 o Code simplification and refactoring: 5254 - Refactor connection_control_process_inbuf() to reduce the size of 5255 a practracker exception. Closes ticket 31840. 5256 - Refactor the microdescs_parse_from_string() function into smaller 5257 pieces, for better comprehensibility. Closes ticket 31675. 5258 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit 5259 tests and fuzzers, rather than using hard-coded values. Closes 5260 ticket 31334. 5261 - Interface for function `decrypt_desc_layer` cleaned up. Closes 5262 ticket 31589. 5263 5264 o Documentation: 5265 - Document the signal-safe logging behaviour in the tor man page. 5266 Also add some comments to the relevant functions. Closes 5267 ticket 31839. 5268 - Explain why we can't destroy the backtrace buffer mutex. Explain 5269 why we don't need to destroy the log mutex. Closes ticket 31736. 5270 - The Tor source code repository now includes a (somewhat dated) 5271 description of Tor's modular architecture, in doc/HACKING/design. 5272 This is based on the old "tor-guts.git" repository, which we are 5273 adopting and superseding. Closes ticket 31849. 5274 5275 5276Changes in version 0.4.1.6 - 2019-09-19 5277 This release backports several bugfixes to improve stability and 5278 correctness. Anyone experiencing build problems or crashes with 0.4.1.5, 5279 or experiencing reliability issues with single onion services, should 5280 upgrade. 5281 5282 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha): 5283 - Tolerate systems (including some Android installations) where 5284 madvise and MADV_DONTDUMP are available at build-time, but not at 5285 run time. Previously, these systems would notice a failed syscall 5286 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha. 5287 - Tolerate systems (including some Linux installations) where 5288 madvise and/or MADV_DONTFORK are available at build-time, but not 5289 at run time. Previously, these systems would notice a failed 5290 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha. 5291 5292 o Minor features (stem tests, backport from 0.4.2.1-alpha): 5293 - Change "make test-stem" so it only runs the stem tests that use 5294 tor. This change makes test-stem faster and more reliable. Closes 5295 ticket 31554. 5296 5297 o Minor bugfixes (build system, backport form 0.4.2.1-alpha): 5298 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows 5299 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. 5300 5301 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha): 5302 - Add more stub functions to fix compilation on Android with link- 5303 time optimization when --disable-module-dirauth is used. 5304 Previously, these compilation settings would make the compiler 5305 look for functions that didn't exist. Fixes bug 31552; bugfix 5306 on 0.4.1.1-alpha. 5307 - Suppress spurious float-conversion warnings from GCC when calling 5308 floating-point classifier functions on FreeBSD. Fixes part of bug 5309 31687; bugfix on 0.3.1.5-alpha. 5310 5311 o Minor bugfixes (controller protocol): 5312 - Fix the MAPADDRESS controller command to accept one or more 5313 arguments. Previously, it required two or more arguments, and ignored 5314 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha. 5315 5316 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha): 5317 - When extracting an IPv6 address from a PF-based proxy, verify that 5318 we are actually configured to receive an IPv6 address, and log an 5319 internal error if not. Fixes part of bug 31687; bugfix 5320 on 0.2.3.4-alpha. 5321 5322 o Minor bugfixes (guards, backport from 0.4.2.1-alpha): 5323 - When tor is missing descriptors for some primary entry guards, 5324 make the log message less alarming. It's normal for descriptors to 5325 expire, as long as tor fetches new ones soon after. Fixes bug 5326 31657; bugfix on 0.3.3.1-alpha. 5327 5328 o Minor bugfixes (logging, backport from 0.4.2.1-alpha): 5329 - Change log level of message "Hash of session info was not as 5330 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix 5331 on 0.1.1.10-alpha. 5332 5333 o Minor bugfixes (rust, backport from 0.4.2.1-alpha): 5334 - Correctly exclude a redundant rust build job in Travis. Fixes bug 5335 31463; bugfix on 0.3.5.4-alpha. 5336 5337 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha): 5338 - Always retry v2 single onion service intro and rend circuits with 5339 a 3-hop path. Previously, v2 single onion services used a 3-hop 5340 path when rendezvous circuits were retried after a remote or 5341 delayed failure, but a 1-hop path for immediate retries. Fixes bug 5342 23818; bugfix on 0.2.9.3-alpha. 5343 5344 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha): 5345 - Always retry v3 single onion service intro and rend circuits with 5346 a 3-hop path. Previously, v3 single onion services used a 3-hop 5347 path when rend circuits were retried after a remote or delayed 5348 failure, but a 1-hop path for immediate retries. Fixes bug 23818; 5349 bugfix on 0.3.2.1-alpha. 5350 - Make v3 single onion services fall back to a 3-hop intro, when all 5351 intro points are unreachable via a 1-hop path. Previously, v3 5352 single onion services failed when all intro nodes were unreachable 5353 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. 5354 5355 o Documentation (backport from 0.4.2.1-alpha): 5356 - Use RFC 2397 data URL scheme to embed an image into tor-exit- 5357 notice.html so that operators no longer have to host it 5358 themselves. Closes ticket 31089. 5359 5360 5361Changes in version 0.4.2.1-alpha - 2019-09-17 5362 This is the first alpha release in the 0.4.2.x series. It adds new 5363 defenses for denial-of-service attacks against onion services. It also 5364 includes numerous kinds of bugfixes and refactoring to help improve 5365 Tor's stability and ease of development. 5366 5367 o Major features (onion service v3, denial of service): 5368 - Add onion service introduction denial of service defenses. Intro 5369 points can now rate-limit client introduction requests, using 5370 parameters that can be sent by the service within the 5371 ESTABLISH_INTRO cell. If the cell extension for this is not used, 5372 the intro point will honor the consensus parameters. Closes 5373 ticket 30924. 5374 5375 o Major bugfixes (circuit build, guard): 5376 - When considering upgrading circuits from "waiting for guard" to 5377 "open", always ignore circuits that are marked for close. 5378 Previously we could end up in the situation where a subsystem is 5379 notified of a circuit opening, but the circuit is still marked for 5380 close, leading to undesirable behavior. Fixes bug 30871; bugfix 5381 on 0.3.0.1-alpha. 5382 5383 o Major bugfixes (crash, Linux, Android): 5384 - Tolerate systems (including some Android installations) where 5385 madvise and MADV_DONTDUMP are available at build-time, but not at 5386 run time. Previously, these systems would notice a failed syscall 5387 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha. 5388 - Tolerate systems (including some Linux installations) where 5389 madvise and/or MADV_DONTFORK are available at build-time, but not 5390 at run time. Previously, these systems would notice a failed 5391 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha. 5392 5393 o Minor features (best practices tracker): 5394 - Our best-practices tracker now integrates with our include-checker 5395 tool to keep track of how many layering violations we have not yet 5396 fixed. We hope to reduce this number over time to improve Tor's 5397 modularity. Closes ticket 31176. 5398 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to 5399 practracker from the environment. We may want this for continuous 5400 integration. Closes ticket 31309. 5401 - Give a warning rather than an error when a practracker exception 5402 is violated by a small amount, add a --list-overbroad option to 5403 practracker that lists exceptions that are stricter than they need 5404 to be, and provide an environment variable for disabling 5405 practracker. Closes ticket 30752. 5406 - Our best-practices tracker now looks at headers as well as C 5407 files. Closes ticket 31175. 5408 5409 o Minor features (build system): 5410 - Add --disable-manpage and --disable-html-manual options to 5411 configure script. This will enable shortening build times by not 5412 building documentation. Resolves issue 19381. 5413 5414 o Minor features (compilation): 5415 - Log a more useful error message when we are compiling and one of 5416 the compile-time hardening options we have selected can be linked 5417 but not executed. Closes ticket 27530. 5418 5419 o Minor features (configuration): 5420 - The configuration code has been extended to allow splitting 5421 configuration data across multiple objects. Previously, all 5422 configuration data needed to be kept in a single object, which 5423 tended to become bloated. Closes ticket 31240. 5424 5425 o Minor features (continuous integration): 5426 - When running CI builds on Travis, put some random data in 5427 ~/.torrc, to make sure no tests are reading the Tor configuration 5428 file from its default location. Resolves issue 30102. 5429 5430 o Minor features (debugging): 5431 - Log a nonfatal assertion failure if we encounter a configuration 5432 line whose command is "CLEAR" but which has a nonempty value. This 5433 should be impossible, according to the rules of our configuration 5434 line parsing. Closes ticket 31529. 5435 5436 o Minor features (git hooks): 5437 - Our pre-commit git hook now checks for a special file before 5438 running practracker, so that practracker only runs on branches 5439 that are based on master. Since the pre-push hook calls the pre- 5440 commit hook, practracker will also only run before pushes of 5441 branches based on master. Closes ticket 30979. 5442 5443 o Minor features (git scripts): 5444 - Add a "--" command-line argument, to separate git-push-all.sh 5445 script arguments from arguments that are passed through to git 5446 push. Closes ticket 31314. 5447 - Add a -r <remote-name> argument to git-push-all.sh, so the script 5448 can push test branches to a personal remote. Closes ticket 31314. 5449 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and 5450 git-push-all.sh, which makes these scripts create, merge forward, 5451 and push test branches. Closes ticket 31314. 5452 - Add a -u argument to git-merge-forward.sh, so that the script can 5453 re-use existing test branches after a merge failure and fix. 5454 Closes ticket 31314. 5455 - Add a TOR_GIT_PUSH env var, which sets the default git push 5456 command and arguments for git-push-all.sh. Closes ticket 31314. 5457 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the 5458 script push master and maint branches with a delay between each 5459 branch. These delays trigger the CI jobs in a set order, which 5460 should show the most likely failures first. Also make pushes 5461 atomic by default, and make the script pass any command-line 5462 arguments to git push. Closes ticket 29879. 5463 - Call the shellcheck script from the pre-commit hook. Closes 5464 ticket 30967. 5465 - Skip pushing test branches that are the same as a remote 5466 maint/release/master branch in git-push-all.sh by default. Add a 5467 -s argument, so git-push-all.sh can push all test branches. Closes 5468 ticket 31314. 5469 5470 o Minor features (IPv6, logging): 5471 - Log IPv6 addresses as well as IPv4 addresses when describing 5472 routerinfos, routerstatuses, and nodes. Closes ticket 21003. 5473 5474 o Minor features (onion service v3): 5475 - Do not allow single hop clients to fetch or post an HS descriptor 5476 from an HSDir. Closes ticket 24964. 5477 5478 o Minor features (onion service): 5479 - Disallow single-hop clients at the introduction point. We've 5480 removed Tor2web support a while back and single-hop rendezvous 5481 attempts are blocked at the relays. This change should remove load 5482 off the network from spammy clients. Close ticket 24963. 5483 5484 o Minor features (stem tests): 5485 - Change "make test-stem" so it only runs the stem tests that use 5486 tor. This change makes test-stem faster and more reliable. Closes 5487 ticket 31554. 5488 5489 o Minor features (testing): 5490 - Add a script to invoke "tor --dump-config" and "tor 5491 --verify-config" with various configuration options, and see 5492 whether tor's resulting configuration or error messages are what 5493 we expect. Use it for integration testing of our +Option and 5494 /Option flags. Closes ticket 31637. 5495 - Improve test coverage for our existing configuration parsing and 5496 management API. Closes ticket 30893. 5497 - Add integration tests to make sure that practracker gives the 5498 outputs we expect. Closes ticket 31477. 5499 - The practracker self-tests are now run as part of the Tor test 5500 suite. Closes ticket 31304. 5501 5502 o Minor features (token bucket): 5503 - Implement a generic token bucket that uses a single counter, for 5504 use in anti-DoS onion service work. Closes ticket 30687. 5505 5506 o Minor bugfixes (best practices tracker): 5507 - Fix a few issues in the best-practices script, including tests, 5508 tab tolerance, error reporting, and directory-exclusion logic. 5509 Fixes bug 29746; bugfix on 0.4.1.1-alpha. 5510 - When running check-best-practices, only consider files in the src 5511 subdirectory. Previously we had recursively considered all 5512 subdirectories, which made us get confused by the temporary 5513 directories made by "make distcheck". Fixes bug 31578; bugfix 5514 on 0.4.1.1-alpha. 5515 5516 o Minor bugfixes (build system): 5517 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows 5518 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha. 5519 5520 o Minor bugfixes (chutney, makefiles, documentation): 5521 - "make test-network-all" now shows the warnings from each test- 5522 network.sh run on the console, so developers see new warnings 5523 early. We've also improved the documentation for this feature, and 5524 renamed a Makefile variable so the code is self-documenting. Fixes 5525 bug 30455; bugfix on 0.3.0.4-rc. 5526 5527 o Minor bugfixes (compilation): 5528 - Add more stub functions to fix compilation on Android with link- 5529 time optimization when --disable-module-dirauth is used. 5530 Previously, these compilation settings would make the compiler 5531 look for functions that didn't exist. Fixes bug 31552; bugfix 5532 on 0.4.1.1-alpha. 5533 - Suppress spurious float-conversion warnings from GCC when calling 5534 floating-point classifier functions on FreeBSD. Fixes part of bug 5535 31687; bugfix on 0.3.1.5-alpha. 5536 5537 o Minor bugfixes (configuration): 5538 - Invalid floating-point values in the configuration file are now 5539 treated as errors in the configuration. Previously, they were 5540 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1. 5541 5542 o Minor bugfixes (coverity): 5543 - Add an assertion when parsing a BEGIN cell so that coverity can be 5544 sure that we are not about to dereference a NULL address. Fixes 5545 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296. 5546 - In our siphash implementation, when building for coverity, use 5547 memcpy in place of a switch statement, so that coverity can tell 5548 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix 5549 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295. 5550 - Fix several coverity warnings from our unit tests. Fixes bug 5551 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha. 5552 5553 o Minor bugfixes (developer tooling): 5554 - Only log git script changes in the post-merge script when the 5555 merge was to the master branch. Fixes bug 31040; bugfix 5556 on 0.4.1.1-alpha. 5557 5558 o Minor bugfixes (directory authorities): 5559 - Return a distinct status when formatting annotations fails. Fixes 5560 bug 30780; bugfix on 0.2.0.8-alpha. 5561 5562 o Minor bugfixes (error handling): 5563 - On abort, try harder to flush the output buffers of log messages. 5564 On some platforms (macOS), log messages could be discarded when 5565 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 5566 - Report the tor version whenever an assertion fails. Previously, we 5567 only reported the Tor version on some crashes, and some non-fatal 5568 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha. 5569 - When tor aborts due to an error, close log file descriptors before 5570 aborting. Closing the logs makes some OSes flush log file buffers, 5571 rather than deleting buffered log lines. Fixes bug 31594; bugfix 5572 on 0.2.5.2-alpha. 5573 5574 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6): 5575 - When extracting an IPv6 address from a PF-based proxy, verify that 5576 we are actually configured to receive an IPv6 address, and log an 5577 internal error if not. Fixes part of bug 31687; bugfix 5578 on 0.2.3.4-alpha. 5579 5580 o Minor bugfixes (git hooks): 5581 - Remove a duplicate call to practracker from the pre-push hook. The 5582 pre-push hook already calls the pre-commit hook, which calls 5583 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha. 5584 5585 o Minor bugfixes (git scripts): 5586 - Stop hard-coding the bash path in the git scripts. Some OSes don't 5587 have bash in /usr/bin, others have an ancient bash at this path. 5588 Fixes bug 30840; bugfix on 0.4.0.1-alpha. 5589 - Stop hard-coding the tor master branch name and worktree path in 5590 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha. 5591 - Allow git-push-all.sh to be run from any directory. Previously, 5592 the script only worked if run from an upstream worktree directory. 5593 Closes ticket 31678. 5594 5595 o Minor bugfixes (guards): 5596 - When tor is missing descriptors for some primary entry guards, 5597 make the log message less alarming. It's normal for descriptors to 5598 expire, as long as tor fetches new ones soon after. Fixes bug 5599 31657; bugfix on 0.3.3.1-alpha. 5600 5601 o Minor bugfixes (ipv6): 5602 - Check for private IPv6 addresses alongside their IPv4 equivalents 5603 when authorities check descriptors. Previously, we only checked 5604 for private IPv4 addresses. Fixes bug 31088; bugfix on 5605 0.2.3.21-rc. Patch by Neel Chauhan. 5606 - When parsing microdescriptors, we should check the IPv6 exit 5607 policy alongside IPv4. Previously, we checked both exit policies 5608 for only router info structures, while microdescriptors were 5609 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by 5610 Neel Chauhan. 5611 5612 o Minor bugfixes (logging): 5613 - Change log level of message "Hash of session info was not as 5614 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix 5615 on 0.1.1.10-alpha. 5616 - Fix a code issue that would have broken our parsing of log domains 5617 as soon as we had 33 of them. Fortunately, we still only have 29. 5618 Fixes bug 31451; bugfix on 0.4.1.4-rc. 5619 5620 o Minor bugfixes (memory management): 5621 - Stop leaking a small amount of memory in nt_service_install(), in 5622 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch 5623 by Xiaoyin Liu. 5624 5625 o Minor bugfixes (networking, IP addresses): 5626 - When parsing addresses via Tor's internal DNS lookup API, reject 5627 IPv4 addresses in square brackets, and accept IPv6 addresses in 5628 square brackets. This change completes the work started in 23082, 5629 making address parsing consistent between tor's internal DNS 5630 lookup and address parsing APIs. Fixes bug 30721; bugfix 5631 on 0.2.1.5-alpha. 5632 - When parsing addresses via Tor's internal address:port parsing and 5633 DNS lookup APIs, require IPv6 addresses with ports to have square 5634 brackets. But allow IPv6 addresses without ports, whether or not 5635 they have square brackets. Fixes bug 30721; bugfix 5636 on 0.2.1.5-alpha. 5637 5638 o Minor bugfixes (onion service v3): 5639 - When purging the client descriptor cache, close any introduction 5640 point circuits associated with purged cache entries. This avoids 5641 picking those circuits later when connecting to the same 5642 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha. 5643 5644 o Minor bugfixes (onion services): 5645 - In the hs_ident_circuit_t data structure, remove the unused field 5646 circuit_type and the respective argument in hs_ident_circuit_new(). 5647 This field was set by clients (for introduction) and services (for 5648 introduction and rendezvous) but was never used afterwards. Fixes 5649 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan. 5650 5651 o Minor bugfixes (operator tools): 5652 - Make tor-print-ed-signing-cert(1) print certificate expiration 5653 date in RFC 1123 and UNIX timestamp formats, to make output 5654 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha. 5655 5656 o Minor bugfixes (rust): 5657 - Correctly exclude a redundant rust build job in Travis. Fixes bug 5658 31463; bugfix on 0.3.5.4-alpha. 5659 - Raise the minimum rustc version to 1.31.0, as checked by configure 5660 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha. 5661 5662 o Minor bugfixes (sendme, code structure): 5663 - Rename the trunnel SENDME file definition from sendme.trunnel to 5664 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the 5665 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha. 5666 5667 o Minor bugfixes (statistics): 5668 - Stop removing the ed25519 signature if the extra info file is too 5669 big. If the signature data was removed, but the keyword was kept, 5670 this could result in an unparseable extra info file. Fixes bug 5671 30958; bugfix on 0.2.7.2-alpha. 5672 5673 o Minor bugfixes (subsystems): 5674 - Make the subsystem init order match the subsystem module 5675 dependencies. Call windows process security APIs as early as 5676 possible. Initialize logging before network and time, so that 5677 network and time can use logging. Fixes bug 31615; bugfix 5678 on 0.4.0.1-alpha. 5679 5680 o Minor bugfixes (testing): 5681 - Teach the util/socketpair_ersatz test to work correctly when we 5682 have no network stack configured. Fixes bug 30804; bugfix 5683 on 0.2.5.1-alpha. 5684 5685 o Minor bugfixes (v2 single onion services): 5686 - Always retry v2 single onion service intro and rend circuits with 5687 a 3-hop path. Previously, v2 single onion services used a 3-hop 5688 path when rendezvous circuits were retried after a remote or 5689 delayed failure, but a 1-hop path for immediate retries. Fixes bug 5690 23818; bugfix on 0.2.9.3-alpha. 5691 5692 o Minor bugfixes (v3 single onion services): 5693 - Always retry v3 single onion service intro and rend circuits with 5694 a 3-hop path. Previously, v3 single onion services used a 3-hop 5695 path when rend circuits were retried after a remote or delayed 5696 failure, but a 1-hop path for immediate retries. Fixes bug 23818; 5697 bugfix on 0.3.2.1-alpha. 5698 - Make v3 single onion services fall back to a 3-hop intro, when all 5699 intro points are unreachable via a 1-hop path. Previously, v3 5700 single onion services failed when all intro nodes were unreachable 5701 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha. 5702 5703 o Documentation: 5704 - Improve documentation in circuit padding subsystem. Patch by 5705 Tobias Pulls. Closes ticket 31113. 5706 - Include an example usage for IPv6 ORPort in our sample torrc. 5707 Closes ticket 31320; patch from Ali Raheem. 5708 - Use RFC 2397 data URL scheme to embed an image into tor-exit- 5709 notice.html so that operators no longer have to host it 5710 themselves. Closes ticket 31089. 5711 5712 o Removed features: 5713 - No longer include recommended package digests in votes as detailed 5714 in proposal 301. The RecommendedPackages torrc option is 5715 deprecated and will no longer have any effect. "package" lines 5716 will still be considered when computing consensuses for consensus 5717 methods that include them. (This change has no effect on the list 5718 of recommended Tor versions, which is still in use.) Closes 5719 ticket 29738. 5720 - Remove torctl.in from contrib/dist directory. Resolves 5721 ticket 30550. 5722 5723 o Testing: 5724 - Run shellcheck for all non-third-party shell scripts that are 5725 shipped with Tor. Closes ticket 29533. 5726 - When checking shell scripts, ignore any user-created directories. 5727 Closes ticket 30967. 5728 5729 o Code simplification and refactoring (config handling): 5730 - Extract our variable manipulation code from confparse.c to a new 5731 lower-level typedvar.h module. Closes ticket 30864. 5732 - Lower another layer of object management from confparse.c to a 5733 more general tool. Now typed structure members are accessible via 5734 an abstract type. Implements ticket 30914. 5735 - Move our backend logic for working with configuration and state 5736 files into a lower-level library, since it no longer depends on 5737 any tor-specific functionality. Closes ticket 31626. 5738 - Numerous simplifications in configuration-handling logic: remove 5739 duplicated macro definitions, replace magical names with flags, 5740 and refactor "TestingTorNetwork" to use the same default-option 5741 logic as the rest of Tor. Closes ticket 30935. 5742 - Replace our ad-hoc set of flags for configuration variables and 5743 configuration variable types with fine-grained orthogonal flags 5744 corresponding to the actual behavior we want. Closes ticket 31625. 5745 5746 o Code simplification and refactoring (misc): 5747 - Eliminate some uses of lower-level control reply abstractions, 5748 primarily in the onion_helper functions. Closes ticket 30889. 5749 - Rework bootstrap tracking to use the new publish-subscribe 5750 subsystem. Closes ticket 29976. 5751 - Rewrite format_node_description() and router_get_verbose_nickname() 5752 to use strlcpy() and strlcat(). The previous implementation used 5753 memcpy() and pointer arithmetic, which was error-prone. Closes 5754 ticket 31545. This is CID 1452819. 5755 - Split extrainfo_dump_to_string() into smaller functions. Closes 5756 ticket 30956. 5757 - Use the ptrdiff_t type consistently for expressing variable 5758 offsets and pointer differences. Previously we incorrectly (but 5759 harmlessly) used int and sometimes off_t for these cases. Closes 5760 ticket 31532. 5761 - Use the subsystems mechanism to manage the main event loop code. 5762 Closes ticket 30806. 5763 - Various simplifications and minor improvements to the circuit 5764 padding machines. Patch by Tobias Pulls. Closes tickets 31112 5765 and 31098. 5766 5767 o Documentation (hard-coded directories): 5768 - Improve the documentation for the DirAuthority and FallbackDir 5769 torrc options. Closes ticket 30955. 5770 5771 o Documentation (tor.1 man page): 5772 - Fix typo in tor.1 man page: the option is "--help", not "-help". 5773 Fixes bug 31008; bugfix on 0.2.2.9-alpha. 5774 5775 5776Changes in version 0.4.1.5 - 2019-08-20 5777 This is the first stable release in the 0.4.1.x series. This series 5778 adds experimental circuit-level padding, authenticated SENDME cells to 5779 defend against certain attacks, and several performance improvements 5780 to save on CPU consumption. It fixes bugs in bootstrapping and v3 5781 onion services. It also includes numerous smaller features and 5782 bugfixes on earlier versions. 5783 5784 Per our support policy, we will support the 0.4.1.x series for nine 5785 months, or until three months after the release of a stable 0.4.2.x: 5786 whichever is longer. If you need longer-term support, please stick 5787 with 0.3.5.x, which will we plan to support until Feb 2022. 5788 5789 Below are the changes since 0.4.1.4-rc. For a complete list of changes 5790 since 0.4.0.5, see the ReleaseNotes file. 5791 5792 o Directory authority changes: 5793 - The directory authority "dizum" has a new IP address. Closes 5794 ticket 31406. 5795 5796 o Minor features (circuit padding logging): 5797 - Demote noisy client-side warn logs about circuit padding to 5798 protocol warnings. Add additional log messages and circuit ID 5799 fields to help with bug 30992 and any other future issues. 5800 5801 o Minor bugfixes (circuit padding negotiation): 5802 - Bump the circuit padding protocol version to explicitly signify 5803 that the HS setup machine support is finalized in 0.4.1.x-stable. 5804 This also means that 0.4.1.x-alpha clients will not negotiate 5805 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients 5806 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x 5807 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha. 5808 5809 o Minor bugfixes (circuit padding): 5810 - Ignore non-padding cells on padding circuits. This addresses 5811 various warning messages from subsystems that were not expecting 5812 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha. 5813 5814 o Minor bugfixes (clock skew detection): 5815 - Don't believe clock skew results from NETINFO cells that appear to 5816 arrive before we sent the VERSIONS cells they are responding to. 5817 Previously, we would accept them up to 3 minutes "in the past". 5818 Fixes bug 31343; bugfix on 0.2.4.4-alpha. 5819 5820 o Minor bugfixes (compatibility, standards compliance): 5821 - Fix a bug that would invoke undefined behavior on certain 5822 operating systems when trying to asprintf() a string exactly 5823 INT_MAX bytes long. We don't believe this is exploitable, but it's 5824 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha. 5825 Found and fixed by Tobias Stoeckmann. 5826 5827 o Minor bugfixes (compilation warning): 5828 - Fix a compilation warning on Windows about casting a function 5829 pointer for GetTickCount64(). Fixes bug 31374; bugfix 5830 on 0.2.9.1-alpha. 5831 5832 o Minor bugfixes (compilation): 5833 - Avoid using labs() on time_t, which can cause compilation warnings 5834 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha. 5835 5836 o Minor bugfixes (distribution): 5837 - Do not ship any temporary files found in the 5838 scripts/maint/practracker directory. Fixes bug 31311; bugfix 5839 on 0.4.1.1-alpha. 5840 5841 o Testing (continuous integration): 5842 - In Travis, make stem log a controller trace to the console, and 5843 tail stem's tor log after failure. Closes ticket 30591. 5844 - In Travis, only run the stem tests that use a tor binary. Closes 5845 ticket 30694. 5846 5847 5848Changes in version 0.4.1.4-rc - 2019-07-25 5849 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and 5850 updates to a new list of fallback directories. If no new bugs are 5851 found, the next release in the 0.4.1.x serious should be stable. 5852 5853 o Major bugfixes (circuit build, guard): 5854 - When considering upgrading circuits from "waiting for guard" to 5855 "open", always ignore circuits that are marked for close. Otherwise, 5856 we can end up in the situation where a subsystem is notified that 5857 a closing circuit has just opened, leading to undesirable 5858 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha. 5859 5860 o Minor features (continuous integration): 5861 - Our Travis configuration now uses Chutney to run some network 5862 integration tests automatically. Closes ticket 29280. 5863 5864 o Minor features (fallback directory list): 5865 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc 5866 in December 2018 (of which ~122 were still functional), with a 5867 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated 5868 in June 2019. Closes ticket 28795. 5869 5870 o Minor bugfixes (circuit padding): 5871 - On relays, properly check that a padding machine is absent before 5872 logging a warning about it being absent. Fixes bug 30649; bugfix 5873 on 0.4.0.1-alpha. 5874 - Add two NULL checks in unreachable places to silence Coverity (CID 5875 144729 and 1447291) and better future-proof ourselves. Fixes bug 5876 31024; bugfix on 0.4.1.1-alpha. 5877 5878 o Minor bugfixes (crash on exit): 5879 - Avoid a set of possible code paths that could try to use freed 5880 memory in routerlist_free() while Tor was exiting. Fixes bug 5881 31003; bugfix on 0.1.2.2-alpha. 5882 5883 o Minor bugfixes (logging): 5884 - Fix a conflict between the flag used for messaging-domain log 5885 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix 5886 on 0.4.1.1-alpha. 5887 5888 o Minor bugfixes (memory leaks): 5889 - Fix a trivial memory leak when parsing an invalid value from a 5890 download schedule in the configuration. Fixes bug 30894; bugfix 5891 on 0.3.4.1-alpha. 5892 5893 o Code simplification and refactoring: 5894 - Remove some dead code from circpad_machine_remove_token() to fix 5895 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix 5896 on 0.4.1.1-alpha. 5897 5898 5899Changes in version 0.4.1.3-alpha - 2019-06-25 5900 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous 5901 alpha, most of them from earlier release series. 5902 5903 o Major bugfixes (Onion service reachability): 5904 - Properly clean up the introduction point map when circuits change 5905 purpose from onion service circuits to pathbias, measurement, or 5906 other circuit types. This should fix some service-side instances 5907 of introduction point failure. Fixes bug 29034; bugfix 5908 on 0.3.2.1-alpha. 5909 5910 o Minor features (geoip): 5911 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2 5912 Country database. Closes ticket 30852. 5913 5914 o Minor features (logging): 5915 - Give a more useful assertion failure message if we think we have 5916 minherit() but we fail to make a region non-inheritable. Give a 5917 compile-time warning if our support for minherit() is incomplete. 5918 Closes ticket 30686. 5919 5920 o Minor bugfixes (circuit isolation): 5921 - Fix a logic error that prevented the SessionGroup sub-option from 5922 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha. 5923 5924 o Minor bugfixes (continuous integration): 5925 - Allow the test-stem job to fail in Travis, because it sometimes 5926 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha. 5927 - Skip test_rebind on macOS in Travis, because it is unreliable on 5928 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 5929 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment 5930 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha. 5931 5932 o Minor bugfixes (directory authorities): 5933 - Stop crashing after parsing an unknown descriptor purpose 5934 annotation. We think this bug can only be triggered by modifying a 5935 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha. 5936 5937 o Minor bugfixes (pluggable transports): 5938 - When running as a bridge with pluggable transports, always publish 5939 pluggable transport information in our extrainfo descriptor, even 5940 if ExtraInfoStatistics is 0. This information is needed by 5941 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha. 5942 5943 o Documentation: 5944 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md. 5945 Closes ticket 30630. 5946 5947 5948Changes in version 0.4.1.2-alpha - 2019-06-06 5949 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the 5950 previous alpha, and some much older. It also contains minor testing 5951 improvements, and an improvement to the security of our authenticated 5952 SENDME implementation. 5953 5954 o Major bugfixes (bridges): 5955 - Consider our directory information to have changed when our list 5956 of bridges changes. Previously, Tor would not re-compute the 5957 status of its directory information when bridges changed, and 5958 therefore would not realize that it was no longer able to build 5959 circuits. Fixes part of bug 29875. 5960 - Do not count previously configured working bridges towards our 5961 total of working bridges. Previously, when Tor's list of bridges 5962 changed, it would think that the old bridges were still usable, 5963 and delay fetching router descriptors for the new ones. Fixes part 5964 of bug 29875; bugfix on 0.3.0.1-alpha. 5965 5966 o Major bugfixes (flow control, SENDME): 5967 - Decrement the stream-level package window after packaging a cell. 5968 Previously, it was done inside a log_debug() call, meaning that if 5969 debug logs were not enabled, the decrement would never happen, and 5970 thus the window would be out of sync with the other end point. 5971 Fixes bug 30628; bugfix on 0.4.1.1-alpha. 5972 5973 o Major bugfixes (onion service reachability): 5974 - Properly clean up the introduction point map and associated state 5975 when circuits change purpose from onion service circuits to 5976 pathbias, measurement, or other circuit types. This may fix some 5977 instances of introduction point failure. Fixes bug 29034; bugfix 5978 on 0.3.2.1-alpha. 5979 5980 o Minor features (authenticated SENDME): 5981 - Ensure that there is enough randomness on every circuit to prevent 5982 an attacker from successfully predicting the hashes they will need 5983 to include in authenticated SENDME cells. At a random interval, if 5984 we have not sent randomness already, we now leave some extra space 5985 at the end of a cell that we can fill with random bytes. Closes 5986 ticket 26846. 5987 5988 o Minor features (continuous integration): 5989 - When running coverage builds on Travis, we now set 5990 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part 5991 of ticket 28878. 5992 5993 o Minor features (maintenance): 5994 - Add a new "make autostyle" target that developers can use to apply 5995 all automatic Tor style and consistency conversions to the 5996 codebase. Closes ticket 30539. 5997 5998 o Minor features (testing): 5999 - The circuitpadding tests now use a reproducible RNG implementation, 6000 so that if a test fails, we can learn why. Part of ticket 28878. 6001 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED, 6002 to set the RNG seed for tests that use a reproducible RNG. Part of 6003 ticket 28878. 6004 - When running tests in coverage mode, take additional care to make 6005 our coverage deterministic, so that we can accurately track 6006 changes in code coverage. Closes ticket 30519. 6007 6008 o Minor bugfixes (configuration, proxies): 6009 - Fix a bug that prevented us from supporting SOCKS5 proxies that 6010 want authentication along with configured (but unused!) 6011 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha. 6012 6013 o Minor bugfixes (controller): 6014 - POSTDESCRIPTOR requests should work again. Previously, they were 6015 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix 6016 on 0.4.1.1-alpha. 6017 - Repair the HSFETCH command so that it works again. Previously, it 6018 expected a body when it shouldn't have. Fixes bug 30646; bugfix 6019 on 0.4.1.1-alpha. 6020 6021 o Minor bugfixes (developer tooling): 6022 - Fix pre-push hook to allow fixup and squash commits when pushing 6023 to non-upstream git remote. Fixes bug 30286; bugfix 6024 on 0.4.0.1-alpha. 6025 6026 o Minor bugfixes (directory authority): 6027 - Move the "bandwidth-file-headers" line in directory authority 6028 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix 6029 on 0.3.5.1-alpha. 6030 6031 o Minor bugfixes (NetBSD): 6032 - Fix usage of minherit() on NetBSD and other platforms that define 6033 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug 6034 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell. 6035 6036 o Minor bugfixes (out-of-memory handler): 6037 - When purging the DNS cache because of an out-of-memory condition, 6038 try purging just the older entries at first. Previously, we would 6039 always purge the whole thing. Fixes bug 29617; bugfix 6040 on 0.3.5.1-alpha. 6041 6042 o Minor bugfixes (portability): 6043 - Avoid crashing in our tor_vasprintf() implementation on systems 6044 that define neither vasprintf() nor _vscprintf(). (This bug has 6045 been here long enough that we question whether people are running 6046 Tor on such systems, but we're applying the fix out of caution.) 6047 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by 6048 Tobias Stoeckmann. 6049 6050 o Minor bugfixes (shutdown, libevent, memory safety): 6051 - Avoid use-after-free bugs when shutting down, by making sure that 6052 we shut down libevent only after shutting down all of its users. 6053 We believe these are harmless in practice, since they only occur 6054 on the shutdown path, and do not involve any attacker-controlled 6055 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha. 6056 6057 o Minor bugfixes (static analysis): 6058 - Fix several spurious Coverity warnings about the unit tests, to 6059 lower our chances of missing real warnings in the future. Fixes 6060 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions. 6061 6062 o Testing: 6063 - Specify torrc paths (with empty files) when launching tor in 6064 integration tests; refrain from reading user and system torrcs. 6065 Resolves issue 29702. 6066 6067 6068Changes in version 0.4.1.1-alpha - 2019-05-22 6069 This is the first alpha in the 0.4.1.x series. It introduces 6070 lightweight circuit padding to make some onion-service circuits harder 6071 to distinguish, includes a new "authenticated SENDME" feature to make 6072 certain denial-of-service attacks more difficult, and improves 6073 performance in several areas. 6074 6075 o Major features (circuit padding): 6076 - Onion service clients now add padding cells at the start of their 6077 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic 6078 look more like general purpose Exit traffic. The overhead for this 6079 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1 6080 extra upstream cell and 10 downstream cells for INTRODUCE 6081 circuits. This feature is only enabled when also supported by the 6082 circuit's middle node. (Clients may specify fixed middle nodes 6083 with the MiddleNodes option, and may force-disable this feature 6084 with the CircuitPadding option.) Closes ticket 28634. 6085 6086 o Major features (code organization): 6087 - Tor now includes a generic publish-subscribe message-passing 6088 subsystem that we can use to organize intermodule dependencies. We 6089 hope to use this to reduce dependencies between modules that don't 6090 need to be related, and to generally simplify our codebase. Closes 6091 ticket 28226. 6092 6093 o Major features (controller protocol): 6094 - Controller commands are now parsed using a generalized parsing 6095 subsystem. Previously, each controller command was responsible for 6096 parsing its own input, which led to strange inconsistencies. 6097 Closes ticket 30091. 6098 6099 o Major features (flow control): 6100 - Implement authenticated SENDMEs as detailed in proposal 289. A 6101 SENDME cell now includes the digest of the traffic that it 6102 acknowledges, so that once an end point receives the SENDME, it 6103 can confirm the other side's knowledge of the previous cells that 6104 were sent, and prevent certain types of denial-of-service attacks. 6105 This behavior is controlled by two new consensus parameters: see 6106 the proposal for more details. Fixes ticket 26288. 6107 6108 o Major features (performance): 6109 - Our node selection algorithm now excludes nodes in linear time. 6110 Previously, the algorithm was quadratic, which could slow down 6111 heavily used onion services. Closes ticket 30307. 6112 6113 o Major features (performance, RNG): 6114 - Tor now constructs a fast secure pseudorandom number generator for 6115 each thread, to use when performance is critical. This PRNG is 6116 based on AES-CTR, using a buffering construction similar to 6117 libottery and the (newer) OpenBSD arc4random() code. It 6118 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for 6119 small outputs. Although we believe it to be cryptographically 6120 strong, we are only using it when necessary for performance. 6121 Implements tickets 29023 and 29536. 6122 6123 o Major bugfixes (onion service v3): 6124 - Fix an unreachable bug in which an introduction point could try to 6125 send an INTRODUCE_ACK with a status code that Trunnel would refuse 6126 to encode, leading the relay to assert(). We've consolidated the 6127 ABI values into Trunnel now. Fixes bug 30454; bugfix 6128 on 0.3.0.1-alpha. 6129 - Clients can now handle unknown status codes from INTRODUCE_ACK 6130 cells. (The NACK behavior will stay the same.) This will allow us 6131 to extend status codes in the future without breaking the normal 6132 client behavior. Fixes another part of bug 30454; bugfix 6133 on 0.3.0.1-alpha. 6134 6135 o Minor features (circuit padding): 6136 - We now use a fast PRNG when scheduling circuit padding. Part of 6137 ticket 28636. 6138 - Allow the padding machine designer to pick the edges of their 6139 histogram instead of trying to compute them automatically using an 6140 exponential formula. Resolves some undefined behavior in the case 6141 of small histograms and allows greater flexibility on machine 6142 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha. 6143 - Allow circuit padding machines to hold a circuit open until they 6144 are done padding it. Closes ticket 28780. 6145 6146 o Minor features (compile-time modules): 6147 - Add a "--list-modules" command to print a list of which compile- 6148 time modules are enabled. Closes ticket 30452. 6149 6150 o Minor features (continuous integration): 6151 - Remove sudo configuration lines from .travis.yml as they are no 6152 longer needed with current Travis build environment. Resolves 6153 issue 30213. 6154 - In Travis, show stem's tor log after failure. Closes ticket 30234. 6155 6156 o Minor features (controller): 6157 - Add onion service version 3 support to the HSFETCH command. 6158 Previously, only version 2 onion services were supported. Closes 6159 ticket 25417. Patch by Neel Chauhan. 6160 6161 o Minor features (debugging): 6162 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable 6163 logging of additional information during assert failure. Now we 6164 can use format strings to include information for trouble 6165 shooting. Resolves ticket 29662. 6166 6167 o Minor features (defense in depth): 6168 - In smartlist_remove_keeporder(), set unused pointers to NULL, in 6169 case a bug causes them to be used later. Closes ticket 30176. 6170 Patch from Tobias Stoeckmann. 6171 - Tor now uses a cryptographically strong PRNG even for decisions 6172 that we do not believe are security-sensitive. Previously, for 6173 performance reasons, we had used a trivially predictable linear 6174 congruential generator algorithm for certain load-balancing and 6175 statistical sampling decisions. Now we use our fast RNG in those 6176 cases. Closes ticket 29542. 6177 6178 o Minor features (developer tools): 6179 - Tor's "practracker" test script now checks for files and functions 6180 that seem too long and complicated. Existing overlong functions 6181 and files are accepted for now, but should eventually be 6182 refactored. Closes ticket 29221. 6183 - Add some scripts used for git maintenance to scripts/git. Closes 6184 ticket 29391. 6185 - Call practracker from pre-push and pre-commit git hooks to let 6186 developers know if they made any code style violations. Closes 6187 ticket 30051. 6188 - Add a script to check that each header has a well-formed and 6189 unique guard macro. Closes ticket 29756. 6190 6191 o Minor features (geoip): 6192 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2 6193 Country database. Closes ticket 30522. 6194 6195 o Minor features (HTTP tunnel): 6196 - Return an informative web page when the HTTPTunnelPort is used as 6197 an HTTP proxy. Closes ticket 27821, patch by "eighthave". 6198 6199 o Minor features (IPv6, v3 onion services): 6200 - Make v3 onion services put IPv6 addresses in service descriptors. 6201 Before this change, service descriptors only contained IPv4 6202 addresses. Implements 26992. 6203 6204 o Minor features (modularity): 6205 - The "--disable-module-dirauth" compile-time option now disables 6206 even more dirauth-only code. Closes ticket 30345. 6207 6208 o Minor features (performance): 6209 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL 6210 1.1.1 and later), since they tend to be faster than tiny-keccak. 6211 Closes ticket 28837. 6212 6213 o Minor features (testing): 6214 - Tor's unit test code now contains helper functions to replace the 6215 PRNG with a deterministic or reproducible version for testing. 6216 Previously, various tests implemented this in various ways. 6217 Implements ticket 29732. 6218 - We now have a script, cov-test-determinism.sh, to identify places 6219 where our unit test coverage has become nondeterministic. Closes 6220 ticket 29436. 6221 - Check that representative subsets of values of `int` and `unsigned 6222 int` can be represented by `void *`. Resolves issue 29537. 6223 6224 o Minor bugfixes (bridge authority): 6225 - Bridge authorities now set bridges as running or non-running when 6226 about to dump their status to a file. Previously, they set bridges 6227 as running in response to a GETINFO command, but those shouldn't 6228 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha. 6229 Patch by Neel Chauhan. 6230 6231 o Minor bugfixes (channel padding statistics): 6232 - Channel padding write totals and padding-enabled totals are now 6233 counted properly in relay extrainfo descriptors. Fixes bug 29231; 6234 bugfix on 0.3.1.1-alpha. 6235 6236 o Minor bugfixes (circuit padding): 6237 - Add a "CircuitPadding" torrc option to disable circuit padding. 6238 Fixes bug 28693; bugfix on 0.4.0.1-alpha. 6239 - Allow circuit padding machines to specify that they do not 6240 contribute much overhead, and provide consensus flags and torrc 6241 options to force clients to only use these low overhead machines. 6242 Fixes bug 29203; bugfix on 0.4.0.1-alpha. 6243 - Provide a consensus parameter to fully disable circuit padding, to 6244 be used in emergency network overload situations. Fixes bug 30173; 6245 bugfix on 0.4.0.1-alpha. 6246 - The circuit padding subsystem will no longer schedule padding if 6247 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha. 6248 - Inspect a circuit-level cell queue before sending padding, to 6249 avoid sending padding while too much data is already queued. Fixes 6250 bug 29204; bugfix on 0.4.0.1-alpha. 6251 - Avoid calling monotime_absolute_usec() in circuit padding machines 6252 that do not use token removal or circuit RTT estimation. Fixes bug 6253 29085; bugfix on 0.4.0.1-alpha. 6254 6255 o Minor bugfixes (compilation, unusual configurations): 6256 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option 6257 due to missing declarations of abort(), and prevent other such 6258 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha. 6259 6260 o Minor bugfixes (controller protocol): 6261 - Teach the controller parser to distinguish an object preceded by 6262 an argument list from one without. Previously, it couldn't 6263 distinguish an argument list from the first line of a multiline 6264 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha. 6265 6266 o Minor bugfixes (directory authority, ipv6): 6267 - Directory authorities with IPv6 support now always mark themselves 6268 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha. 6269 Patch by Neel Chauhan. 6270 6271 o Minor bugfixes (documentation): 6272 - Improve the documentation for using MapAddress with ".exit". Fixes 6273 bug 30109; bugfix on 0.1.0.1-rc. 6274 - Improve the monotonic time module and function documentation to 6275 explain what "monotonic" actually means, and document some results 6276 that have surprised people. Fixes bug 29640; bugfix 6277 on 0.2.9.1-alpha. 6278 - Use proper formatting when providing an example on quoting options 6279 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc. 6280 6281 o Minor bugfixes (logging): 6282 - Do not log a warning when running with an OpenSSL version other 6283 than the one Tor was compiled with, if the two versions should be 6284 compatible. Previously, we would warn whenever the version was 6285 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha. 6286 - Warn operators when the MyFamily option is set but ContactInfo is 6287 missing, as the latter should be set too. Fixes bug 25110; bugfix 6288 on 0.3.3.1-alpha. 6289 6290 o Minor bugfixes (memory leak): 6291 - Avoid a minor memory leak that could occur on relays when failing 6292 to create a "keys" directory. Fixes bug 30148; bugfix 6293 on 0.3.3.1-alpha. 6294 6295 o Minor bugfixes (onion services): 6296 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc 6297 implemenation) when failing to load an onion service client 6298 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha. 6299 - When refusing to launch a controller's HSFETCH request because of 6300 rate-limiting, respond to the controller with a new response, 6301 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for 6302 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by 6303 Neel Chauhan. 6304 - When relaunching a circuit to a rendezvous service, mark the 6305 circuit as needing high-uptime routers as appropriate. Fixes bug 6306 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan. 6307 - Stop ignoring IPv6 link specifiers sent to v3 onion services. 6308 (IPv6 support for v3 onion services is still incomplete: see 6309 ticket 23493 for details.) Fixes bug 23588; bugfix on 6310 0.3.2.1-alpha. Patch by Neel Chauhan. 6311 6312 o Minor bugfixes (onion services, performance): 6313 - When building circuits to onion services, call tor_addr_parse() 6314 less often. Previously, we called tor_addr_parse() in 6315 circuit_is_acceptable() even if its output wasn't used. This 6316 change should improve performance when building circuits. Fixes 6317 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan. 6318 6319 o Minor bugfixes (performance): 6320 - When checking whether a node is a bridge, use a fast check to make 6321 sure that its identity is set. Previously, we used a constant-time 6322 check, which is not necessary in this case. Fixes bug 30308; 6323 bugfix on 0.3.5.1-alpha. 6324 6325 o Minor bugfixes (pluggable transports): 6326 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as 6327 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha. 6328 6329 o Minor bugfixes (probability distributions): 6330 - Refactor and improve parts of the probability distribution code 6331 that made Coverity complain. Fixes bug 29805; bugfix 6332 on 0.4.0.1-alpha. 6333 6334 o Minor bugfixes (python): 6335 - Stop assuming that /usr/bin/python3 exists. For scripts that work 6336 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env 6337 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha. 6338 6339 o Minor bugfixes (relay): 6340 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay 6341 is auto, act as if ExitRelay is 1. Previously, we would ignore 6342 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on 6343 0.3.5.1-alpha. Patch by Neel Chauhan. 6344 6345 o Minor bugfixes (stats): 6346 - When ExtraInfoStatistics is 0, stop including bandwidth usage 6347 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and 6348 bridge statistics by country in extra-info documents. Fixes bug 6349 29018; bugfix on 0.2.4.1-alpha. 6350 6351 o Minor bugfixes (testing): 6352 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously 6353 we used `ulimit -c` in test_bt.sh, which violates POSIX shell 6354 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha. 6355 - Fix some incorrect code in the v3 onion service unit tests. Fixes 6356 bug 29243; bugfix on 0.3.2.1-alpha. 6357 - In the "routerkeys/*" tests, check the return values of mkdir() 6358 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha. 6359 Found by Coverity as CID 1444254. 6360 - Split test_utils_general() into several smaller test functions. 6361 This makes it easier to perform resource deallocation on assert 6362 failure, and fixes Coverity warnings CID 1444117 and CID 1444118. 6363 Fixes bug 29823; bugfix on 0.2.9.1-alpha. 6364 6365 o Minor bugfixes (tor-resolve): 6366 - Fix a memory leak in tor-resolve that could happen if Tor gave it 6367 a malformed SOCKS response. (Memory leaks in tor-resolve don't 6368 actually matter, but it's good to fix them anyway.) Fixes bug 6369 30151; bugfix on 0.4.0.1-alpha. 6370 6371 o Code simplification and refactoring: 6372 - Abstract out the low-level formatting of replies on the control 6373 port. Implements ticket 30007. 6374 - Add several assertions in an attempt to fix some Coverity 6375 warnings. Closes ticket 30149. 6376 - Introduce a connection_dir_buf_add() helper function that checks 6377 for compress_state of dir_connection_t and automatically writes a 6378 string to directory connection with or without compression. 6379 Resolves issue 28816. 6380 - Make the base32_decode() API return the number of bytes written, 6381 for consistency with base64_decode(). Closes ticket 28913. 6382 - Move most relay-only periodic events out of mainloop.c into the 6383 relay subsystem. Closes ticket 30414. 6384 - Refactor and encapsulate parts of the codebase that manipulate 6385 crypt_path_t objects. Resolves issue 30236. 6386 - Refactor several places in our code that Coverity incorrectly 6387 believed might have memory leaks. Closes ticket 30147. 6388 - Remove redundant return values in crypto_format, and the 6389 associated return value checks elsewhere in the code. Make the 6390 implementations in crypto_format consistent, and remove redundant 6391 code. Resolves ticket 29660. 6392 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that 6393 it is not a constant-time function. Closes ticket 30309. 6394 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove 6395 all hs_desc_link_specifier_t-specific code. Fixes bug 22781; 6396 bugfix on 0.3.2.1-alpha. 6397 - Simplify v3 onion service link specifier handling code. Fixes bug 6398 23576; bugfix on 0.3.2.1-alpha. 6399 - Split crypto_digest.c into NSS code, OpenSSL code, and shared 6400 code. Resolves ticket 29108. 6401 - Split control.c into several submodules, in preparation for 6402 distributing its current responsibilities throughout the codebase. 6403 Closes ticket 29894. 6404 - Start to move responsibility for knowing about periodic events to 6405 the appropriate subsystems, so that the mainloop doesn't need to 6406 know all the periodic events in the rest of the codebase. 6407 Implements tickets 30293 and 30294. 6408 6409 o Documentation: 6410 - Document how to find git commits and tags for bug fixes in 6411 CodingStandards.md. Update some file documentation. Closes 6412 ticket 30261. 6413 6414 o Removed features: 6415 - Remove the linux-tor-prio.sh script from contrib/operator-tools 6416 directory. Resolves issue 29434. 6417 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076. 6418 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves 6419 issue 30075. 6420 6421 o Code simplification and refactoring (shell scripts): 6422 - Clean up many of our shell scripts to fix shellcheck warnings. 6423 These include autogen.sh (ticket 26069), test_keygen.sh (ticket 6424 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket 6425 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh 6426 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926), 6427 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059), 6428 nagios-check-tor-authority-cert (ticket 29071), 6429 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh 6430 (ticket 29060), test_key_expiration.sh (ticket 30002), 6431 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh 6432 (ticket 29067). 6433 6434 o Testing (chutney): 6435 - In "make test-network-all", test IPv6-only v3 single onion 6436 services, using the chutney network single-onion-v23-ipv6-md. 6437 Closes ticket 27251. 6438 6439 6440Changes in version 0.4.0.5 - 2019-05-02 6441 This is the first stable release in the 0.4.0.x series. It contains 6442 improvements for power management and bootstrap reporting, as well as 6443 preliminary backend support for circuit padding to prevent some kinds 6444 of traffic analysis. It also continues our work in refactoring Tor for 6445 long-term maintainability. 6446 6447 Per our support policy, we will support the 0.4.0.x series for nine 6448 months, or until three months after the release of a stable 0.4.1.x: 6449 whichever is longer. If you need longer-term support, please stick 6450 with 0.3.5.x, which will we plan to support until Feb 2022. 6451 6452 Below are the changes since 0.4.0.4-rc. For a complete list of changes 6453 since 0.3.5.7, see the ReleaseNotes file. 6454 6455 o Minor features (continuous integration): 6456 - In Travis, tell timelimit to use stem's backtrace signals, and 6457 launch python directly from timelimit, so python receives the 6458 signals from timelimit, rather than make. Closes ticket 30117. 6459 6460 o Minor features (diagnostic): 6461 - Add more diagnostic log messages in an attempt to solve the issue 6462 of NUL bytes appearing in a microdescriptor cache. Related to 6463 ticket 28223. 6464 6465 o Minor features (testing): 6466 - Use the approx_time() function when setting the "Expires" header 6467 in directory replies, to make them more testable. Needed for 6468 ticket 30001. 6469 6470 o Minor bugfixes (rust): 6471 - Abort on panic in all build profiles, instead of potentially 6472 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha. 6473 6474 o Minor bugfixes (shellcheck): 6475 - Look for scripts in their correct locations during "make 6476 shellcheck". Previously we had looked in the wrong place during 6477 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha. 6478 6479 o Minor bugfixes (testing): 6480 - Check the time in the "Expires" header using approx_time(). Fixes 6481 bug 30001; bugfix on 0.4.0.4-rc. 6482 6483 o Minor bugfixes (UI): 6484 - Lower log level of unlink() errors during bootstrap. Fixes bug 6485 29930; bugfix on 0.4.0.1-alpha. 6486 6487 6488Changes in version 0.4.0.4-rc - 2019-04-11 6489 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes 6490 several bugs from earlier versions, including some that had affected 6491 stability, and one that prevented relays from working with NSS. 6492 6493 o Major bugfixes (NSS, relay): 6494 - When running with NSS, disable TLS 1.2 ciphersuites that use 6495 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for 6496 these ciphersuites don't work -- which caused relays to fail to 6497 handshake with one another when these ciphersuites were enabled. 6498 Fixes bug 29241; bugfix on 0.3.5.1-alpha. 6499 6500 o Minor features (bandwidth authority): 6501 - Make bandwidth authorities ignore relays that are reported in the 6502 bandwidth file with the flag "vote=0". This change allows us to 6503 report unmeasured relays for diagnostic reasons without including 6504 their bandwidth in the bandwidth authorities' vote. Closes 6505 ticket 29806. 6506 - When a directory authority is using a bandwidth file to obtain the 6507 bandwidth values that will be included in the next vote, serve 6508 this bandwidth file at /tor/status-vote/next/bandwidth. Closes 6509 ticket 21377. 6510 6511 o Minor features (circuit padding): 6512 - Stop warning about undefined behavior in the probability 6513 distribution tests. Float division by zero may technically be 6514 undefined behavior in C, but it's well defined in IEEE 754. 6515 Partial backport of 29298. Closes ticket 29527; bugfix 6516 on 0.4.0.1-alpha. 6517 6518 o Minor features (continuous integration): 6519 - On Travis Rust builds, cleanup Rust registry and refrain from 6520 caching the "target/" directory to speed up builds. Resolves 6521 issue 29962. 6522 6523 o Minor features (dormant mode): 6524 - Add a DormantCanceledByStartup option to tell Tor that it should 6525 treat a startup event as cancelling any previous dormant state. 6526 Integrators should use this option with caution: it should only be 6527 used if Tor is being started because of something that the user 6528 did, and not if Tor is being automatically started in the 6529 background. Closes ticket 29357. 6530 6531 o Minor features (geoip): 6532 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2 6533 Country database. Closes ticket 29992. 6534 6535 o Minor features (NSS, diagnostic): 6536 - Try to log an error from NSS (if there is any) and a more useful 6537 description of our situation if we are using NSS and a call to 6538 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241. 6539 6540 o Minor bugfixes (security): 6541 - Fix a potential double free bug when reading huge bandwidth files. 6542 The issue is not exploitable in the current Tor network because 6543 the vulnerable code is only reached when directory authorities 6544 read bandwidth files, but bandwidth files come from a trusted 6545 source (usually the authorities themselves). Furthermore, the 6546 issue is only exploitable in rare (non-POSIX) 32-bit architectures, 6547 which are not used by any of the current authorities. Fixes bug 6548 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by 6549 Tobias Stoeckmann. 6550 - Verify in more places that we are not about to create a buffer 6551 with more than INT_MAX bytes, to avoid possible OOB access in the 6552 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and 6553 fixed by Tobias Stoeckmann. 6554 6555 o Minor bugfix (continuous integration): 6556 - Reset coverage state on disk after Travis CI has finished. This 6557 should prevent future coverage merge errors from causing the test 6558 suite for the "process" subsystem to fail. The process subsystem 6559 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix 6560 on 0.2.9.15. 6561 - Terminate test-stem if it takes more than 9.5 minutes to run. 6562 (Travis terminates the job after 10 minutes of no output.) 6563 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha. 6564 6565 o Minor bugfixes (bootstrap reporting): 6566 - During bootstrap reporting, correctly distinguish pluggable 6567 transports from plain proxies. Fixes bug 28925; bugfix 6568 on 0.4.0.1-alpha. 6569 6570 o Minor bugfixes (C correctness): 6571 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug 6572 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning 6573 CID 1444119. 6574 6575 o Minor bugfixes (circuitpadding testing): 6576 - Minor tweaks to avoid rare test failures related to timers and 6577 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha. 6578 6579 o Minor bugfixes (directory authorities): 6580 - Actually include the bandwidth-file-digest line in directory 6581 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha. 6582 6583 o Minor bugfixes (logging): 6584 - On Windows, when errors cause us to reload a consensus from disk, 6585 tell the user that we are retrying at log level "notice". 6586 Previously we only logged this information at "info", which was 6587 confusing because the errors themselves were logged at "warning". 6588 Improves previous fix for 28614. Fixes bug 30004; bugfix 6589 on 0.4.0.2-alpha. 6590 6591 o Minor bugfixes (pluggable transports): 6592 - Restore old behavior when it comes to discovering the path of a 6593 given Pluggable Transport executable file. A change in 6594 0.4.0.1-alpha had broken this behavior on paths containing a 6595 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha. 6596 6597 o Minor bugfixes (testing): 6598 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a 6599 recent test-network.sh to use new chutney features in CI. Fixes 6600 bug 29703; bugfix on 0.2.9.1-alpha. 6601 - Fix a test failure on Windows caused by an unexpected "BUG" 6602 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix 6603 on 0.2.9.3-alpha. 6604 6605 o Minor bugfixes (TLS protocol): 6606 - When classifying a client's selection of TLS ciphers, if the 6607 client ciphers are not yet available, do not cache the result. 6608 Previously, we had cached the unavailability of the cipher list 6609 and never looked again, which in turn led us to assume that the 6610 client only supported the ancient V1 link protocol. This, in turn, 6611 was causing Stem integration tests to stall in some cases. Fixes 6612 bug 30021; bugfix on 0.2.4.8-alpha. 6613 6614 o Code simplification and refactoring: 6615 - Introduce a connection_dir_buf_add() helper function that detects 6616 whether compression is in use, and adds a string accordingly. 6617 Resolves issue 28816. 6618 - Refactor handle_get_next_bandwidth() to use 6619 connection_dir_buf_add(). Implements ticket 29897. 6620 6621 o Documentation: 6622 - Clarify that Tor performs stream isolation among *Port listeners 6623 by default. Resolves issue 29121. 6624 6625 6626Changes in version 0.4.0.3-alpha - 2019-03-22 6627 Tor 0.4.0.3-alpha is the third in its series; it fixes several small 6628 bugs from earlier versions. 6629 6630 o Minor features (address selection): 6631 - Treat the subnet 100.64.0.0/10 as public for some purposes; 6632 private for others. This subnet is the RFC 6598 (Carrier Grade 6633 NAT) IP range, and is deployed by many ISPs as an alternative to 6634 RFC 1918 that does not break existing internal networks. Tor now 6635 blocks SOCKS and control ports on these addresses and warns users 6636 if client ports or ExtORPorts are listening on a RFC 6598 address. 6637 Closes ticket 28525. Patch by Neel Chauhan. 6638 6639 o Minor features (geoip): 6640 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2 6641 Country database. Closes ticket 29666. 6642 6643 o Minor bugfixes (circuitpadding): 6644 - Inspect the circuit-level cell queue before sending padding, to 6645 avoid sending padding when too much data is queued. Fixes bug 6646 29204; bugfix on 0.4.0.1-alpha. 6647 6648 o Minor bugfixes (logging): 6649 - Correct a misleading error message when IPv4Only or IPv6Only is 6650 used but the resolved address can not be interpreted as an address 6651 of the specified IP version. Fixes bug 13221; bugfix on 6652 0.2.3.9-alpha. Patch from Kris Katterjohn. 6653 - Log the correct port number for listening sockets when "auto" is 6654 used to let Tor pick the port number. Previously, port 0 was 6655 logged instead of the actual port number. Fixes bug 29144; bugfix 6656 on 0.3.5.1-alpha. Patch from Kris Katterjohn. 6657 - Stop logging a BUG() warning when Tor is waiting for exit 6658 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha. 6659 6660 o Minor bugfixes (memory management): 6661 - Refactor the shared random state's memory management so that it 6662 actually takes ownership of the shared random value pointers. 6663 Fixes bug 29706; bugfix on 0.2.9.1-alpha. 6664 6665 o Minor bugfixes (memory management, testing): 6666 - Stop leaking parts of the shared random state in the shared-random 6667 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha. 6668 6669 o Minor bugfixes (pluggable transports): 6670 - Fix an assertion failure crash bug when a pluggable transport is 6671 terminated during the bootstrap phase. Fixes bug 29562; bugfix 6672 on 0.4.0.1-alpha. 6673 6674 o Minor bugfixes (Rust, protover): 6675 - Add a missing "Padding" value to the Rust implementation of 6676 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha. 6677 6678 o Minor bugfixes (single onion services): 6679 - Allow connections to single onion services to remain idle without 6680 being disconnected. Previously, relays acting as rendezvous points 6681 for single onion services were mistakenly closing idle rendezvous 6682 circuits after 60 seconds, thinking that they were unused 6683 directory-fetching circuits that had served their purpose. Fixes 6684 bug 29665; bugfix on 0.2.1.26. 6685 6686 o Minor bugfixes (stats): 6687 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in 6688 relay and bridge extra-info documents. Fixes bug 29017; bugfix 6689 on 0.3.1.1-alpha. 6690 6691 o Minor bugfixes (testing): 6692 - Downgrade some LOG_ERR messages in the address/* tests to 6693 warnings. The LOG_ERR messages were occurring when we had no 6694 configured network. We were failing the unit tests, because we 6695 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug 6696 29530; bugfix on 0.3.5.8. 6697 - Fix our gcov wrapper script to look for object files at the 6698 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha. 6699 - Decrease the false positive rate of stochastic probability 6700 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha. 6701 6702 o Minor bugfixes (Windows, CI): 6703 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit 6704 Windows Server 2012 R2 job. The remaining 2 jobs still provide 6705 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set 6706 fast_finish, so failed jobs terminate the build immediately. Fixes 6707 bug 29601; bugfix on 0.3.5.4-alpha. 6708 6709 6710Changes in version 0.3.5.8 - 2019-02-21 6711 Tor 0.3.5.8 backports several fixes from later releases, including fixes 6712 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x 6713 releases. 6714 6715 It also includes a fix for a medium-severity security bug affecting Tor 6716 0.3.2.1-alpha and later. All Tor instances running an affected release 6717 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha. 6718 6719 o Major bugfixes (cell scheduler, KIST, security): 6720 - Make KIST consider the outbuf length when computing what it can 6721 put in the outbuf. Previously, KIST acted as though the outbuf 6722 were empty, which could lead to the outbuf becoming too full. It 6723 is possible that an attacker could exploit this bug to cause a Tor 6724 client or relay to run out of memory and crash. Fixes bug 29168; 6725 bugfix on 0.3.2.1-alpha. This issue is also being tracked as 6726 TROVE-2019-001 and CVE-2019-8955. 6727 6728 o Major bugfixes (networking, backport from 0.4.0.2-alpha): 6729 - Gracefully handle empty username/password fields in SOCKS5 6730 username/password auth message and allow SOCKS5 handshake to 6731 continue. Previously, we had rejected these handshakes, breaking 6732 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha. 6733 6734 o Minor features (compilation, backport from 0.4.0.2-alpha): 6735 - Compile correctly when OpenSSL is built with engine support 6736 disabled, or with deprecated APIs disabled. Closes ticket 29026. 6737 Patches from "Mangix". 6738 6739 o Minor features (geoip): 6740 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2 6741 Country database. Closes ticket 29478. 6742 6743 o Minor features (testing, backport from 0.4.0.2-alpha): 6744 - Treat all unexpected ERR and BUG messages as test failures. Closes 6745 ticket 28668. 6746 6747 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha): 6748 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS 6749 connection waiting for a descriptor that we actually have in the 6750 cache. It turns out that this can actually happen, though it is 6751 rare. Now, tor will recover and retry the descriptor. Fixes bug 6752 28669; bugfix on 0.3.2.4-alpha. 6753 6754 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha): 6755 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the 6756 IPv6 socket was bound using an address family of AF_INET instead 6757 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from 6758 Kris Katterjohn. 6759 6760 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha): 6761 - Update Cargo.lock file to match the version made by the latest 6762 version of Rust, so that "make distcheck" will pass again. Fixes 6763 bug 29244; bugfix on 0.3.3.4-alpha. 6764 6765 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha): 6766 - Select guards even if the consensus has expired, as long as the 6767 consensus is still reasonably live. Fixes bug 24661; bugfix 6768 on 0.3.0.1-alpha. 6769 6770 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha): 6771 - Compile correctly on OpenBSD; previously, we were missing some 6772 headers required in order to detect it properly. Fixes bug 28938; 6773 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn. 6774 6775 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha): 6776 - Describe the contents of the v3 onion service client authorization 6777 files correctly: They hold public keys, not private keys. Fixes 6778 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix". 6779 6780 o Minor bugfixes (logging, backport from 0.4.0.1-alpha): 6781 - Rework rep_hist_log_link_protocol_counts() to iterate through all 6782 link protocol versions when logging incoming/outgoing connection 6783 counts. Tor no longer skips version 5, and we won't have to 6784 remember to update this function when new link protocol version is 6785 developed. Fixes bug 28920; bugfix on 0.2.6.10. 6786 6787 o Minor bugfixes (logging, backport from 0.4.0.2-alpha): 6788 - Log more information at "warning" level when unable to read a 6789 private key; log more information at "info" level when unable to 6790 read a public key. We had warnings here before, but they were lost 6791 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha. 6792 6793 o Minor bugfixes (misc, backport from 0.4.0.2-alpha): 6794 - The amount of total available physical memory is now determined 6795 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM) 6796 when it is defined and a 64-bit variant is not available. Fixes 6797 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn. 6798 6799 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha): 6800 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more 6801 than one private key for a hidden service. Fixes bug 29040; bugfix 6802 on 0.3.5.1-alpha. 6803 - In hs_cache_store_as_client() log an HSDesc we failed to parse at 6804 "debug" level. Tor used to log it as a warning, which caused very 6805 long log lines to appear for some users. Fixes bug 29135; bugfix 6806 on 0.3.2.1-alpha. 6807 - Stop logging "Tried to establish rendezvous on non-OR circuit..." 6808 as a warning. Instead, log it as a protocol warning, because there 6809 is nothing that relay operators can do to fix it. Fixes bug 29029; 6810 bugfix on 0.2.5.7-rc. 6811 6812 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha): 6813 - Mark outdated dirservers when Tor only has a reasonably live 6814 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha. 6815 6816 o Minor bugfixes (tests, backport from 0.4.0.2-alpha): 6817 - Detect and suppress "bug" warnings from the util/time test on 6818 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha. 6819 - Do not log an error-level message if we fail to find an IPv6 6820 network interface from the unit tests. Fixes bug 29160; bugfix 6821 on 0.2.7.3-rc. 6822 6823 o Minor bugfixes (usability, backport from 0.4.0.1-alpha): 6824 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate(). 6825 Some users took this phrasing to mean that the mentioned guard was 6826 under their control or responsibility, which it is not. Fixes bug 6827 28895; bugfix on Tor 0.3.0.1-alpha. 6828 6829 6830Changes in version 0.3.4.11 - 2019-02-21 6831 Tor 0.3.4.11 is the third stable release in its series. It includes 6832 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and 6833 later. All Tor instances running an affected release should upgrade to 6834 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha. 6835 6836 o Major bugfixes (cell scheduler, KIST, security): 6837 - Make KIST consider the outbuf length when computing what it can 6838 put in the outbuf. Previously, KIST acted as though the outbuf 6839 were empty, which could lead to the outbuf becoming too full. It 6840 is possible that an attacker could exploit this bug to cause a Tor 6841 client or relay to run out of memory and crash. Fixes bug 29168; 6842 bugfix on 0.3.2.1-alpha. This issue is also being tracked as 6843 TROVE-2019-001 and CVE-2019-8955. 6844 6845 o Minor features (geoip): 6846 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2 6847 Country database. Closes ticket 29478. 6848 6849 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha): 6850 - Update Cargo.lock file to match the version made by the latest 6851 version of Rust, so that "make distcheck" will pass again. Fixes 6852 bug 29244; bugfix on 0.3.3.4-alpha. 6853 6854 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha): 6855 - Stop logging "Tried to establish rendezvous on non-OR circuit..." 6856 as a warning. Instead, log it as a protocol warning, because there 6857 is nothing that relay operators can do to fix it. Fixes bug 29029; 6858 bugfix on 0.2.5.7-rc. 6859 6860 6861Changes in version 0.3.3.12 - 2019-02-21 6862 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor 6863 0.3.2.1-alpha and later. All Tor instances running an affected release 6864 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha. 6865 6866 This release marks the end of support for the Tor 0.3.3.x series. We 6867 recommend that users switch to either the Tor 0.3.4 series (supported 6868 until at least 10 June 2019), or the Tor 0.3.5 series, which will 6869 receive long-term support until at least 1 Feb 2022. 6870 6871 o Major bugfixes (cell scheduler, KIST, security): 6872 - Make KIST consider the outbuf length when computing what it can 6873 put in the outbuf. Previously, KIST acted as though the outbuf 6874 were empty, which could lead to the outbuf becoming too full. It 6875 is possible that an attacker could exploit this bug to cause a Tor 6876 client or relay to run out of memory and crash. Fixes bug 29168; 6877 bugfix on 0.3.2.1-alpha. This issue is also being tracked as 6878 TROVE-2019-001 and CVE-2019-8955. 6879 6880 o Minor features (geoip): 6881 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2 6882 Country database. Closes ticket 29478. 6883 6884 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha): 6885 - Update Cargo.lock file to match the version made by the latest 6886 version of Rust, so that "make distcheck" will pass again. Fixes 6887 bug 29244; bugfix on 0.3.3.4-alpha. 6888 6889 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha): 6890 - Stop logging "Tried to establish rendezvous on non-OR circuit..." 6891 as a warning. Instead, log it as a protocol warning, because there 6892 is nothing that relay operators can do to fix it. Fixes bug 29029; 6893 bugfix on 0.2.5.7-rc. 6894 6895 6896Changes in version 0.4.0.2-alpha - 2019-02-21 6897 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several 6898 bugs from earlier versions, including several that had broken 6899 backward compatibility. 6900 6901 It also includes a fix for a medium-severity security bug affecting Tor 6902 0.3.2.1-alpha and later. All Tor instances running an affected release 6903 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha. 6904 6905 o Major bugfixes (cell scheduler, KIST, security): 6906 - Make KIST consider the outbuf length when computing what it can 6907 put in the outbuf. Previously, KIST acted as though the outbuf 6908 were empty, which could lead to the outbuf becoming too full. It 6909 is possible that an attacker could exploit this bug to cause a Tor 6910 client or relay to run out of memory and crash. Fixes bug 29168; 6911 bugfix on 0.3.2.1-alpha. This issue is also being tracked as 6912 TROVE-2019-001 and CVE-2019-8955. 6913 6914 o Major bugfixes (networking): 6915 - Gracefully handle empty username/password fields in SOCKS5 6916 username/password auth messsage and allow SOCKS5 handshake to 6917 continue. Previously, we had rejected these handshakes, breaking 6918 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha. 6919 6920 o Major bugfixes (windows, startup): 6921 - When reading a consensus file from disk, detect whether it was 6922 written in text mode, and re-read it in text mode if so. Always 6923 write consensus files in binary mode so that we can map them into 6924 memory later. Previously, we had written in text mode, which 6925 confused us when we tried to map the file on windows. Fixes bug 6926 28614; bugfix on 0.4.0.1-alpha. 6927 6928 o Minor features (compilation): 6929 - Compile correctly when OpenSSL is built with engine support 6930 disabled, or with deprecated APIs disabled. Closes ticket 29026. 6931 Patches from "Mangix". 6932 6933 o Minor features (developer tooling): 6934 - Check that bugfix versions in changes files look like Tor versions 6935 from the versions spec. Warn when bugfixes claim to be on a future 6936 release. Closes ticket 27761. 6937 - Provide a git pre-commit hook that disallows committing if we have 6938 any failures in our code and changelog formatting checks. It is 6939 now available in scripts/maint/pre-commit.git-hook. Implements 6940 feature 28976. 6941 6942 o Minor features (directory authority): 6943 - When a directory authority is using a bandwidth file to obtain 6944 bandwidth values, include the digest of that file in the vote. 6945 Closes ticket 26698. 6946 6947 o Minor features (geoip): 6948 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2 6949 Country database. Closes ticket 29478. 6950 6951 o Minor features (testing): 6952 - Treat all unexpected ERR and BUG messages as test failures. Closes 6953 ticket 28668. 6954 6955 o Minor bugfixes (build, compatibility, rust): 6956 - Update Cargo.lock file to match the version made by the latest 6957 version of Rust, so that "make distcheck" will pass again. Fixes 6958 bug 29244; bugfix on 0.3.3.4-alpha. 6959 6960 o Minor bugfixes (compilation): 6961 - Fix compilation warnings in test_circuitpadding.c. Fixes bug 6962 29169; bugfix on 0.4.0.1-alpha. 6963 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug 6964 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn. 6965 6966 o Minor bugfixes (documentation): 6967 - Describe the contents of the v3 onion service client authorization 6968 files correctly: They hold public keys, not private keys. Fixes 6969 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix". 6970 6971 o Minor bugfixes (linux seccomp sandbox): 6972 - Fix startup crash when experimental sandbox support is enabled. 6973 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber. 6974 6975 o Minor bugfixes (logging): 6976 - Avoid logging that we are relaxing a circuit timeout when that 6977 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha. 6978 - Log more information at "warning" level when unable to read a 6979 private key; log more information at "info" level when unable to 6980 read a public key. We had warnings here before, but they were lost 6981 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha. 6982 6983 o Minor bugfixes (misc): 6984 - The amount of total available physical memory is now determined 6985 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM) 6986 when it is defined and a 64-bit variant is not available. Fixes 6987 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn. 6988 6989 o Minor bugfixes (onion services): 6990 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more 6991 than one private key for a hidden service. Fixes bug 29040; bugfix 6992 on 0.3.5.1-alpha. 6993 - In hs_cache_store_as_client() log an HSDesc we failed to parse at 6994 "debug" level. Tor used to log it as a warning, which caused very 6995 long log lines to appear for some users. Fixes bug 29135; bugfix 6996 on 0.3.2.1-alpha. 6997 - Stop logging "Tried to establish rendezvous on non-OR circuit..." 6998 as a warning. Instead, log it as a protocol warning, because there 6999 is nothing that relay operators can do to fix it. Fixes bug 29029; 7000 bugfix on 0.2.5.7-rc. 7001 7002 o Minor bugfixes (scheduler): 7003 - When re-adding channels to the pending list, check the correct 7004 channel's sched_heap_idx. This issue has had no effect in mainline 7005 Tor, but could have led to bugs down the road in improved versions 7006 of our circuit scheduling code. Fixes bug 29508; bugfix 7007 on 0.3.2.10. 7008 7009 o Minor bugfixes (tests): 7010 - Fix intermittent failures on an adaptive padding test. Fixes one 7011 case of bug 29122; bugfix on 0.4.0.1-alpha. 7012 - Disable an unstable circuit-padding test that was failing 7013 intermittently because of an ill-defined small histogram. Such 7014 histograms will be allowed again after 29298 is implemented. Fixes 7015 a second case of bug 29122; bugfix on 0.4.0.1-alpha. 7016 - Detect and suppress "bug" warnings from the util/time test on 7017 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha. 7018 - Do not log an error-level message if we fail to find an IPv6 7019 network interface from the unit tests. Fixes bug 29160; bugfix 7020 on 0.2.7.3-rc. 7021 7022 o Documentation: 7023 - In the manpage entry describing MapAddress torrc setting, use 7024 example IP addresses from ranges specified for use in documentation 7025 by RFC 5737. Resolves issue 28623. 7026 7027 o Removed features: 7028 - Remove the old check-tor script. Resolves issue 29072. 7029 7030 7031Changes in version 0.4.0.1-alpha - 2019-01-18 7032 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It 7033 introduces improved features for power and bandwidth conservation, 7034 more accurate reporting of bootstrap progress for user interfaces, and 7035 an experimental backend for an exciting new adaptive padding feature. 7036 There is also the usual assortment of bugfixes and minor features, all 7037 described below. 7038 7039 o Major features (battery management, client, dormant mode): 7040 - When Tor is running as a client, and it is unused for a long time, 7041 it can now enter a "dormant" state. When Tor is dormant, it avoids 7042 network and CPU activity until it is reawoken either by a user 7043 request or by a controller command. For more information, see the 7044 configuration options starting with "Dormant". Implements tickets 7045 2149 and 28335. 7046 - The client's memory of whether it is "dormant", and how long it 7047 has spent idle, persists across invocations. Implements 7048 ticket 28624. 7049 - There is a DormantOnFirstStartup option that integrators can use 7050 if they expect that in many cases, Tor will be installed but 7051 not used. 7052 7053 o Major features (bootstrap reporting): 7054 - When reporting bootstrap progress, report the first connection 7055 uniformly, regardless of whether it's a connection for building 7056 application circuits. This allows finer-grained reporting of early 7057 progress than previously possible, with the improvements of ticket 7058 27169. Closes tickets 27167 and 27103. Addresses ticket 27308. 7059 - When reporting bootstrap progress, treat connecting to a proxy or 7060 pluggable transport as separate from having successfully used that 7061 proxy or pluggable transport to connect to a relay. Closes tickets 7062 27100 and 28884. 7063 7064 o Major features (circuit padding): 7065 - Implement preliminary support for the circuit padding portion of 7066 Proposal 254. The implementation supports Adaptive Padding (aka 7067 WTF-PAD) state machines for use between experimental clients and 7068 relays. Support is also provided for APE-style state machines that 7069 use probability distributions instead of histograms to specify 7070 inter-packet delay. At the moment, Tor does not provide any 7071 padding state machines that are used in normal operation: for now, 7072 this feature exists solely for experimentation. Closes 7073 ticket 28142. 7074 7075 o Major features (refactoring): 7076 - Tor now uses an explicit list of its own subsystems when 7077 initializing and shutting down. Previously, these systems were 7078 managed implicitly in various places throughout the codebase. 7079 (There may still be some subsystems using the old system.) Closes 7080 ticket 28330. 7081 7082 o Minor features (bootstrap reporting): 7083 - When reporting bootstrap progress, stop distinguishing between 7084 situations where only internal paths are available and situations 7085 where external paths are available. Previously, Tor would often 7086 erroneously report that it had only internal paths. Closes 7087 ticket 27402. 7088 7089 o Minor features (continuous integration): 7090 - Log Python version during each Travis CI job. Resolves 7091 issue 28551. 7092 7093 o Minor features (controller): 7094 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP. 7095 Implements ticket 28843. 7096 7097 o Minor features (developer tooling): 7098 - Provide a git hook script to prevent "fixup!" and "squash!" 7099 commits from ending up in the master branch, as scripts/main/pre- 7100 push.git-hook. Closes ticket 27993. 7101 7102 o Minor features (directory authority): 7103 - Directory authorities support a new consensus algorithm, under 7104 which the family lines in microdescriptors are encoded in a 7105 canonical form. This change makes family lines more compressible 7106 in transit, and on the client. Closes ticket 28266; implements 7107 proposal 298. 7108 7109 o Minor features (directory authority, relay): 7110 - Authorities now vote on a "StaleDesc" flag to indicate that a 7111 relay's descriptor is so old that the relay should upload again 7112 soon. Relays treat this flag as a signal to upload a new 7113 descriptor. This flag will eventually let us remove the 7114 'published' date from routerstatus entries, and make our consensus 7115 diffs much smaller. Closes ticket 26770; implements proposal 293. 7116 7117 o Minor features (fallback directory mirrors): 7118 - Update the fallback whitelist based on operator opt-ins and opt- 7119 outs. Closes ticket 24805, patch by Phoul. 7120 7121 o Minor features (FreeBSD): 7122 - On FreeBSD-based systems, warn relay operators if the 7123 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled. 7124 Closes ticket 28518. 7125 7126 o Minor features (HTTP standards compliance): 7127 - Stop sending the header "Content-type: application/octet-stream" 7128 along with transparently compressed documents: this confused 7129 browsers. Closes ticket 28100. 7130 7131 o Minor features (IPv6): 7132 - We add an option ClientAutoIPv6ORPort, to make clients randomly 7133 prefer a node's IPv4 or IPv6 ORPort. The random preference is set 7134 every time a node is loaded from a new consensus or bridge config. 7135 We expect that this option will enable clients to bootstrap more 7136 quickly without having to determine whether they support IPv4, 7137 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan. 7138 - When using addrs_in_same_network_family(), avoid choosing circuit 7139 paths that pass through the same IPv6 subnet more than once. 7140 Previously, we only checked IPv4 subnets. Closes ticket 24393. 7141 Patch by Neel Chauhan. 7142 7143 o Minor features (log messages): 7144 - Improve log message in v3 onion services that could print out 7145 negative revision counters. Closes ticket 27707. Patch 7146 by "ffmancera". 7147 7148 o Minor features (memory usage): 7149 - Save memory by storing microdescriptor family lists with a more 7150 compact representation. Closes ticket 27359. 7151 - Tor clients now use mmap() to read consensus files from disk, so 7152 that they no longer need keep the full text of a consensus in 7153 memory when parsing it or applying a diff. Closes ticket 27244. 7154 7155 o Minor features (parsing): 7156 - Directory authorities now validate that router descriptors and 7157 ExtraInfo documents are in a valid subset of UTF-8, and reject 7158 them if they are not. Closes ticket 27367. 7159 7160 o Minor features (performance): 7161 - Cache the results of summarize_protocol_flags(), so that we don't 7162 have to parse the same protocol-versions string over and over. 7163 This should save us a huge number of malloc calls on startup, and 7164 may reduce memory fragmentation with some allocators. Closes 7165 ticket 27225. 7166 - Remove a needless memset() call from get_token_arguments, thereby 7167 speeding up the tokenization of directory objects by about 20%. 7168 Closes ticket 28852. 7169 - Replace parse_short_policy() with a faster implementation, to 7170 improve microdescriptor parsing time. Closes ticket 28853. 7171 - Speed up directory parsing a little by avoiding use of the non- 7172 inlined strcmp_len() function. Closes ticket 28856. 7173 - Speed up microdescriptor parsing by about 30%, to help improve 7174 startup time. Closes ticket 28839. 7175 7176 o Minor features (pluggable transports): 7177 - Add support for emitting STATUS updates to Tor's control port from 7178 a pluggable transport process. Closes ticket 28846. 7179 - Add support for logging to Tor's logging subsystem from a 7180 pluggable transport process. Closes ticket 28180. 7181 7182 o Minor features (process management): 7183 - Add a new process API for handling child processes. This new API 7184 allows Tor to have bi-directional communication with child 7185 processes on both Unix and Windows. Closes ticket 28179. 7186 - Use the subsystem manager to initialize and shut down the process 7187 module. Closes ticket 28847. 7188 7189 o Minor features (relay): 7190 - When listing relay families, list them in canonical form including 7191 the relay's own identity, and try to give a more useful set of 7192 warnings. Part of ticket 28266 and proposal 298. 7193 7194 o Minor features (required protocols): 7195 - Before exiting because of a missing required protocol, Tor will 7196 now check the publication time of the consensus, and not exit 7197 unless the consensus is newer than the Tor program's own release 7198 date. Previously, Tor would not check the consensus publication 7199 time, and so might exit because of a missing protocol that might 7200 no longer be required in a current consensus. Implements proposal 7201 297; closes ticket 27735. 7202 7203 o Minor features (testing): 7204 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor 7205 networks. Closes ticket 28840. Patch by Rob Jansen. 7206 7207 o Minor bugfixes (client, clock skew): 7208 - Bootstrap successfully even when Tor's clock is behind the clocks 7209 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha. 7210 - Select guards even if the consensus has expired, as long as the 7211 consensus is still reasonably live. Fixes bug 24661; bugfix 7212 on 0.3.0.1-alpha. 7213 7214 o Minor bugfixes (compilation): 7215 - Compile correctly on OpenBSD; previously, we were missing some 7216 headers required in order to detect it properly. Fixes bug 28938; 7217 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn. 7218 7219 o Minor bugfixes (directory clients): 7220 - Mark outdated dirservers when Tor only has a reasonably live 7221 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha. 7222 7223 o Minor bugfixes (directory mirrors): 7224 - Even when a directory mirror's clock is behind the clocks on the 7225 authorities, we now allow the mirror to serve "future" 7226 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha. 7227 7228 o Minor bugfixes (DNS): 7229 - Gracefully handle an empty or absent resolve.conf file by falling 7230 back to using "localhost" as a DNS server (and hoping it works). 7231 Previously, we would just stop running as an exit. Fixes bug 7232 21900; bugfix on 0.2.1.10-alpha. 7233 7234 o Minor bugfixes (guards): 7235 - In count_acceptable_nodes(), the minimum number is now one bridge 7236 or guard node, and two non-guard nodes for a circuit. Previously, 7237 we had added up the sum of all nodes with a descriptor, but that 7238 could cause us to build failing circuits when we had either too 7239 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on 7240 0.2.3.1-alpha. Patch by Neel Chauhan. 7241 7242 o Minor bugfixes (IPv6): 7243 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the 7244 IPv6 socket was bound using an address family of AF_INET instead 7245 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from 7246 Kris Katterjohn. 7247 7248 o Minor bugfixes (logging): 7249 - Rework rep_hist_log_link_protocol_counts() to iterate through all 7250 link protocol versions when logging incoming/outgoing connection 7251 counts. Tor no longer skips version 5, and we won't have to 7252 remember to update this function when new link protocol version is 7253 developed. Fixes bug 28920; bugfix on 0.2.6.10. 7254 7255 o Minor bugfixes (networking): 7256 - Introduce additional checks into tor_addr_parse() to reject 7257 certain incorrect inputs that previously were not detected. Fixes 7258 bug 23082; bugfix on 0.2.0.10-alpha. 7259 7260 o Minor bugfixes (onion service v3, client): 7261 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS 7262 connection waiting for a descriptor that we actually have in the 7263 cache. It turns out that this can actually happen, though it is 7264 rare. Now, tor will recover and retry the descriptor. Fixes bug 7265 28669; bugfix on 0.3.2.4-alpha. 7266 7267 o Minor bugfixes (periodic events): 7268 - Refrain from calling routerlist_remove_old_routers() from 7269 check_descriptor_callback(). Instead, create a new hourly periodic 7270 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha. 7271 7272 o Minor bugfixes (pluggable transports): 7273 - Make sure that data is continously read from standard output and 7274 standard error pipes of a pluggable transport child-process, to 7275 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360; 7276 bugfix on 0.2.3.6-alpha. 7277 7278 o Minor bugfixes (unit tests): 7279 - Instead of relying on hs_free_all() to clean up all onion service 7280 objects in test_build_descriptors(), we now deallocate them one by 7281 one. This lets Coverity know that we are not leaking memory there 7282 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha. 7283 7284 o Minor bugfixes (usability): 7285 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate(). 7286 Some users took this phrasing to mean that the mentioned guard was 7287 under their control or responsibility, which it is not. Fixes bug 7288 28895; bugfix on Tor 0.3.0.1-alpha. 7289 7290 o Code simplification and refactoring: 7291 - Reimplement NETINFO cell parsing and generation to rely on 7292 trunnel-generated wire format handling code. Closes ticket 27325. 7293 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes 7294 ticket 28077. 7295 - Rework SOCKS wire format handling to rely on trunnel-generated 7296 parsing/generation code. Resolves ticket 27620. 7297 - Split out bootstrap progress reporting from control.c into a 7298 separate file. Part of ticket 27402. 7299 - The .may_include files that we use to describe our directory-by- 7300 directory dependency structure now describe a noncircular 7301 dependency graph over the directories that they cover. Our 7302 checkIncludes.py tool now enforces this noncircularity. Closes 7303 ticket 28362. 7304 7305 o Documentation: 7306 - Mention that you cannot add a new onion service if Tor is already 7307 running with Sandbox enabled. Closes ticket 28560. 7308 - Improve ControlPort documentation. Mention that it accepts 7309 address:port pairs, and can be used multiple times. Closes 7310 ticket 28805. 7311 - Document the exact output of "tor --version". Closes ticket 28889. 7312 7313 o Removed features: 7314 - Stop responding to the 'GETINFO status/version/num-concurring' and 7315 'GETINFO status/version/num-versioning' control port commands, as 7316 those were deprecated back in 0.2.0.30. Also stop listing them in 7317 output of 'GETINFO info/names'. Resolves ticket 28757. 7318 - The scripts used to generate and maintain the list of fallback 7319 directories have been extracted into a new "fallback-scripts" 7320 repository. Closes ticket 27914. 7321 7322 o Testing: 7323 - Run shellcheck for scripts in the in scripts/ directory. Closes 7324 ticket 28058. 7325 - Add unit tests for tokenize_string() and get_next_token() 7326 functions. Resolves ticket 27625. 7327 7328 o Code simplification and refactoring (onion service v3): 7329 - Consolidate the authorized client descriptor cookie computation 7330 code from client and service into one function. Closes 7331 ticket 27549. 7332 7333 o Code simplification and refactoring (shell scripts): 7334 - Cleanup scan-build.sh to silence shellcheck warnings. Closes 7335 ticket 28007. 7336 - Fix issues that shellcheck found in chutney-git-bisect.sh. 7337 Resolves ticket 28006. 7338 - Fix issues that shellcheck found in updateRustDependencies.sh. 7339 Resolves ticket 28012. 7340 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009. 7341 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011. 7342 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010. 7343 - Fix shellcheck warnings in scripts/test/coverage. Resolves 7344 issue 28008. 7345 7346 7347Changes in version 0.3.3.11 - 2019-01-07 7348 Tor 0.3.3.11 backports numerous fixes from later versions of Tor. 7349 numerous fixes, including an important fix for anyone using OpenSSL 7350 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade 7351 to this version, or to a later series. 7352 7353 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019. 7354 We anticipate that this will be the last release of Tor 0.3.3, unless 7355 some major bug is before then. Some time between now and then, users 7356 should switch to either the Tor 0.3.4 series (supported until at least 7357 10 June 2019), or the Tor 0.3.5 series, which will receive long-term 7358 support until at least 1 Feb 2022. 7359 7360 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha): 7361 - Fix our usage of named groups when running as a TLS 1.3 client in 7362 OpenSSL 1.1.1. Previously, we only initialized EC groups when 7363 running as a relay, which caused clients to fail to negotiate TLS 7364 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3 7365 support was added). 7366 7367 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha): 7368 - Fix a use-after-free error that could be caused by passing Tor an 7369 impossible set of options that would fail during options_act(). 7370 Fixes bug 27708; bugfix on 0.3.3.1-alpha. 7371 7372 o Minor features (continuous integration, backport from 0.3.5.1-alpha): 7373 - Only run one online rust build in Travis, to reduce network 7374 errors. Skip offline rust builds on Travis for Linux gcc, because 7375 they're redundant. Implements ticket 27252. 7376 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a 7377 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on 7378 Linux with default settings, because all the non-default builds 7379 use gcc on Linux. Implements ticket 27252. 7380 7381 o Minor features (continuous integration, backport from 0.3.5.3-alpha): 7382 - Use the Travis Homebrew addon to install packages on macOS during 7383 Travis CI. The package list is the same, but the Homebrew addon 7384 does not do a `brew update` by default. Implements ticket 27738. 7385 7386 o Minor features (fallback directory list, backport from 0.3.5.6-rc): 7387 - Replace the 150 fallbacks originally introduced in Tor 7388 0.3.3.1-alpha in January 2018 (of which ~115 were still 7389 functional), with a list of 157 fallbacks (92 new, 65 existing, 85 7390 removed) generated in December 2018. Closes ticket 24803. 7391 7392 o Minor features (geoip): 7393 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2 7394 Country database. Closes ticket 29012. 7395 7396 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7): 7397 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3 7398 key export function from handling long labels. When this bug is 7399 detected, Tor will disable TLS 1.3. We recommend upgrading to a 7400 version of OpenSSL without this bug when it becomes available. 7401 Closes ticket 28973. 7402 7403 o Minor bugfixes (relay statistics, backport from 0.3.5.7): 7404 - Update relay descriptor on bandwidth changes only when the uptime 7405 is smaller than 24h, in order to reduce the efficiency of guard 7406 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha. 7407 7408 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha): 7409 - Avoid undefined behavior in an end-of-string check when parsing 7410 the BEGIN line in a directory object. Fixes bug 28202; bugfix 7411 on 0.2.0.3-alpha. 7412 7413 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha): 7414 - Rewrite our assertion macros so that they no longer suppress the 7415 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix 7416 7417 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha): 7418 - Initialize a variable unconditionally in aes_new_cipher(), since 7419 some compilers cannot tell that we always initialize it before 7420 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha. 7421 7422 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha): 7423 - Log additional info when we get a relay that shares an ed25519 ID 7424 with a different relay, instead making a BUG() warning. Fixes bug 7425 27800; bugfix on 0.3.2.1-alpha. 7426 7427 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha): 7428 - When a user requests a group-readable DataDirectory, give it to 7429 them. Previously, when the DataDirectory and the CacheDirectory 7430 were the same, the default setting (0) for 7431 CacheDirectoryGroupReadable would override the setting for 7432 DataDirectoryGroupReadable. Fixes bug 26913; bugfix 7433 on 0.3.3.1-alpha. 7434 7435 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha): 7436 - When the onion service directory can't be created or has the wrong 7437 permissions, do not log a stack trace. Fixes bug 27335; bugfix 7438 on 0.3.2.1-alpha. 7439 7440 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha): 7441 - Close all SOCKS request (for the same .onion) if the newly fetched 7442 descriptor is unusable. Before that, we would close only the first 7443 one leaving the other hanging and let to time out by themselves. 7444 Fixes bug 27410; bugfix on 0.3.2.1-alpha. 7445 7446 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha): 7447 - Don't warn so loudly when Tor is unable to decode an onion 7448 descriptor. This can now happen as a normal use case if a client 7449 gets a descriptor with client authorization but the client is not 7450 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha. 7451 7452 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc): 7453 - When deleting an ephemeral onion service (DEL_ONION), do not close 7454 any rendezvous circuits in order to let the existing client 7455 connections finish by themselves or closed by the application. The 7456 HS v2 is doing that already so now we have the same behavior for 7457 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha. 7458 7459 o Minor bugfixes (HTTP tunnel): 7460 - Fix a bug warning when closing an HTTP tunnel connection due to 7461 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on 7462 0.3.2.1-alpha. 7463 7464 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha): 7465 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419; 7466 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger. 7467 7468 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha): 7469 - Ensure circuitmux queues are empty before scheduling or sending 7470 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha. 7471 7472 o Minor bugfixes (protover, backport from 0.3.5.3-alpha): 7473 - Reject protocol names containing bytes other than alphanumeric 7474 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix 7475 on 0.2.9.4-alpha. 7476 7477 o Minor bugfixes (rust, backport from 0.3.5.1-alpha): 7478 - Compute protover votes correctly in the rust version of the 7479 protover code. Previously, the protover rewrite in 24031 allowed 7480 repeated votes from the same voter for the same protocol version 7481 to be counted multiple times in protover_compute_vote(). Fixes bug 7482 27649; bugfix on 0.3.3.5-rc. 7483 - Reject protover names that contain invalid characters. Fixes bug 7484 27687; bugfix on 0.3.3.1-alpha. 7485 7486 o Minor bugfixes (rust, backport from 0.3.5.2-alpha): 7487 - protover_all_supported() would attempt to allocate up to 16GB on 7488 some inputs, leading to a potential memory DoS. Fixes bug 27206; 7489 bugfix on 0.3.3.5-rc. 7490 7491 o Minor bugfixes (rust, backport from 0.3.5.4-alpha): 7492 - Fix a potential null dereference in protover_all_supported(). Add 7493 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha. 7494 - Return a string that can be safely freed by C code, not one 7495 created by the rust allocator, in protover_all_supported(). Fixes 7496 bug 27740; bugfix on 0.3.3.1-alpha. 7497 - Fix an API mismatch in the rust implementation of 7498 protover_compute_vote(). This bug could have caused crashes on any 7499 directory authorities running Tor with Rust (which we do not yet 7500 recommend). Fixes bug 27741; bugfix on 0.3.3.6. 7501 7502 o Minor bugfixes (testing, backport from 0.3.5.1-alpha): 7503 - If a unit test running in a subprocess exits abnormally or with a 7504 nonzero status code, treat the test as having failed, even if the 7505 test reported success. Without this fix, memory leaks don't cause 7506 the tests to fail, even with LeakSanitizer. Fixes bug 27658; 7507 bugfix on 0.2.2.4-alpha. 7508 7509 o Minor bugfixes (testing, backport from 0.3.5.4-alpha): 7510 - Treat backtrace test failures as expected on BSD-derived systems 7511 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808. 7512 (FreeBSD failures have been treated as expected since 18204 in 7513 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha. 7514 7515 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc): 7516 - Stop leaking memory in an entry guard unit test. Fixes bug 28554; 7517 bugfix on 0.3.0.1-alpha. 7518 7519 7520Changes in version 0.3.4.10 - 2019-01-07 7521 Tor 0.3.4.9 is the second stable release in its series; it backports 7522 numerous fixes, including an important fix for relays, and for anyone 7523 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4 7524 should upgrade. 7525 7526 As a reminder, the Tor 0.3.4 series will be supported until 10 June 7527 2019. Some time between now and then, users should switch to the Tor 7528 0.3.5 series, which will receive long-term support until at least 1 7529 Feb 2022. 7530 7531 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha): 7532 - Fix our usage of named groups when running as a TLS 1.3 client in 7533 OpenSSL 1.1.1. Previously, we only initialized EC groups when 7534 running as a relay, which caused clients to fail to negotiate TLS 7535 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3 7536 support was added). 7537 7538 o Major bugfixes (relay, directory, backport from 0.3.5.7): 7539 - Always reactivate linked connections in the main loop so long as 7540 any linked connection has been active. Previously, connections 7541 serving directory information wouldn't get reactivated after the 7542 first chunk of data was sent (usually 32KB), which would prevent 7543 clients from bootstrapping. Fixes bug 28912; bugfix on 7544 0.3.4.1-alpha. Patch by "cypherpunks3". 7545 7546 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc): 7547 - Always show the configure and test logs, and upload them as build 7548 artifacts, when building for Windows using Appveyor CI. 7549 Implements 28459. 7550 7551 o Minor features (controller, backport from 0.3.5.1-alpha): 7552 - For purposes of CIRC_BW-based dropped cell detection, track half- 7553 closed stream ids, and allow their ENDs, SENDMEs, DATA and path 7554 bias check cells to arrive without counting it as dropped until 7555 either the END arrives, or the windows are empty. Closes 7556 ticket 25573. 7557 7558 o Minor features (fallback directory list, backport from 0.3.5.6-rc): 7559 - Replace the 150 fallbacks originally introduced in Tor 7560 0.3.3.1-alpha in January 2018 (of which ~115 were still 7561 functional), with a list of 157 fallbacks (92 new, 65 existing, 85 7562 removed) generated in December 2018. Closes ticket 24803. 7563 7564 o Minor features (geoip): 7565 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2 7566 Country database. Closes ticket 28395. 7567 7568 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7): 7569 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3 7570 key export function from handling long labels. When this bug is 7571 detected, Tor will disable TLS 1.3. We recommend upgrading to a 7572 version of OpenSSL without this bug when it becomes available. 7573 Closes ticket 28973. 7574 7575 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha): 7576 - Initialize a variable unconditionally in aes_new_cipher(), since 7577 some compilers cannot tell that we always initialize it before 7578 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha. 7579 7580 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha): 7581 - Avoid a logging a BUG() stacktrace when closing connection held 7582 open because the write side is rate limited but not the read side. 7583 Now, the connection read side is simply shut down until Tor is 7584 able to flush the connection and close it. Fixes bug 27750; bugfix 7585 on 0.3.4.1-alpha. 7586 7587 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha): 7588 - Manually configure the zstd compiler options, when building using 7589 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does 7590 not come with a pkg-config file. Fixes bug 28454; bugfix 7591 on 0.3.4.1-alpha. 7592 - Stop using an external OpenSSL install, and stop installing MSYS2 7593 packages, when building using mingw on Appveyor Windows CI. Fixes 7594 bug 28399; bugfix on 0.3.4.1-alpha. 7595 7596 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc): 7597 - Explicitly specify the path to the OpenSSL library and do not 7598 download OpenSSL from Pacman, but instead use the library that is 7599 already provided by AppVeyor. Fixes bug 28574; bugfix on master. 7600 7601 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha): 7602 - When a user requests a group-readable DataDirectory, give it to 7603 them. Previously, when the DataDirectory and the CacheDirectory 7604 were the same, the default setting (0) for 7605 CacheDirectoryGroupReadable would override the setting for 7606 DataDirectoryGroupReadable. Fixes bug 26913; bugfix 7607 on 0.3.3.1-alpha. 7608 7609 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha): 7610 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419; 7611 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger. 7612 7613 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha): 7614 - Don't warn so loudly when Tor is unable to decode an onion 7615 descriptor. This can now happen as a normal use case if a client 7616 gets a descriptor with client authorization but the client is not 7617 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha. 7618 7619 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc): 7620 - When deleting an ephemeral onion service (DEL_ONION), do not close 7621 any rendezvous circuits in order to let the existing client 7622 connections finish by themselves or closed by the application. The 7623 HS v2 is doing that already so now we have the same behavior for 7624 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha. 7625 7626 o Minor bugfixes (relay statistics, backport from 0.3.5.7): 7627 - Update relay descriptor on bandwidth changes only when the uptime 7628 is smaller than 24h, in order to reduce the efficiency of guard 7629 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha. 7630 7631 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc): 7632 - Stop leaking memory in an entry guard unit test. Fixes bug 28554; 7633 bugfix on 0.3.0.1-alpha. 7634 7635 7636Changes in version 0.3.5.7 - 2019-01-07 7637 Tor 0.3.5.7 is the first stable release in its series; it includes 7638 compilation and portability fixes, and a fix for a severe problem 7639 affecting directory caches. 7640 7641 The Tor 0.3.5 series includes several new features and performance 7642 improvements, including client authorization for v3 onion services, 7643 cleanups to bootstrap reporting, support for improved bandwidth- 7644 measurement tools, experimental support for NSS in place of OpenSSL, 7645 and much more. It also begins a full reorganization of Tor's code 7646 layout, for improved modularity and maintainability in the future. 7647 Finally, there is the usual set of performance improvements and 7648 bugfixes that we try to do in every release series. 7649 7650 There are a couple of changes in the 0.3.5 that may affect 7651 compatibility. First, the default version for newly created onion 7652 services is now v3. Use the HiddenServiceVersion option if you want to 7653 override this. Second, some log messages related to bootstrapping have 7654 changed; if you use stem, you may need to update to the latest version 7655 so it will recognize them. 7656 7657 We have designated 0.3.5 as a "long-term support" (LTS) series: we 7658 will continue to patch major bugs in typical configurations of 0.3.5 7659 until at least 1 Feb 2022. (We do not plan to provide long-term 7660 support for embedding, Rust support, NSS support, running a directory 7661 authority, or unsupported platforms. For these, you will need to stick 7662 with the latest stable release.) 7663 7664 Below are the changes since 0.3.5.6-rc. For a complete list of changes 7665 since 0.3.4.9, see the ReleaseNotes file. 7666 7667 o Major bugfixes (relay, directory): 7668 - Always reactivate linked connections in the main loop so long as 7669 any linked connection has been active. Previously, connections 7670 serving directory information wouldn't get reactivated after the 7671 first chunk of data was sent (usually 32KB), which would prevent 7672 clients from bootstrapping. Fixes bug 28912; bugfix on 7673 0.3.4.1-alpha. Patch by "cypherpunks3". 7674 7675 o Minor features (compilation): 7676 - When possible, place our warning flags in a separate file, to 7677 avoid flooding verbose build logs. Closes ticket 28924. 7678 7679 o Minor features (geoip): 7680 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2 7681 Country database. Closes ticket 29012. 7682 7683 o Minor features (OpenSSL bug workaround): 7684 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3 7685 key export function from handling long labels. When this bug is 7686 detected, Tor will disable TLS 1.3. We recommend upgrading to a 7687 version of OpenSSL without this bug when it becomes available. 7688 Closes ticket 28973. 7689 7690 o Minor features (performance): 7691 - Remove about 96% of the work from the function that we run at 7692 startup to test our curve25519_basepoint implementation. Since 7693 this function has yet to find an actual failure, we now only run 7694 it for 8 iterations instead of 200. Based on our profile 7695 information, this change should save around 8% of our startup time 7696 on typical desktops, and may have a similar effect on other 7697 platforms. Closes ticket 28838. 7698 - Stop re-validating our hardcoded Diffie-Hellman parameters on 7699 every startup. Doing this wasted time and cycles, especially on 7700 low-powered devices. Closes ticket 28851. 7701 7702 o Minor bugfixes (compilation): 7703 - Fix compilation for Android by adding a missing header to 7704 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha. 7705 7706 o Minor bugfixes (correctness): 7707 - Fix an unreached code path where we checked the value of 7708 "hostname" inside send_resolved_hostname_cell(). Previously, we 7709 used it before checking it; now we check it first. Fixes bug 7710 28879; bugfix on 0.1.2.7-alpha. 7711 7712 o Minor bugfixes (testing): 7713 - Make sure that test_rebind.py actually obeys its timeout, even 7714 when it receives a large number of log messages. Fixes bug 28883; 7715 bugfix on 0.3.5.4-alpha. 7716 - Stop running stem's unit tests as part of "make test-stem", but 7717 continue to run stem's unit and online tests during "make test- 7718 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha. 7719 7720 o Minor bugfixes (windows services): 7721 - Make Tor start correctly as an NT service again: previously it was 7722 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha. 7723 7724 o Code simplification and refactoring: 7725 - When parsing a port configuration, make it more obvious to static 7726 analyzer tools that we always initialize the address. Closes 7727 ticket 28881. 7728 7729 7730Changes in version 0.3.5.6-rc - 2018-12-18 7731 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor. 7732 It is the first release candidate in the 0.3.5.x series; if no further 7733 huge bugs are found, our next release may be the stable 0.3.5.x. 7734 7735 o Minor features (continuous integration, Windows): 7736 - Always show the configure and test logs, and upload them as build 7737 artifacts, when building for Windows using Appveyor CI. 7738 Implements 28459. 7739 7740 o Minor features (fallback directory list): 7741 - Replace the 150 fallbacks originally introduced in Tor 7742 0.3.3.1-alpha in January 2018 (of which ~115 were still 7743 functional), with a list of 157 fallbacks (92 new, 65 existing, 85 7744 removed) generated in December 2018. Closes ticket 24803. 7745 7746 o Minor features (geoip): 7747 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2 7748 Country database. Closes ticket 28744. 7749 7750 o Minor bugfixes (compilation): 7751 - Add missing dependency on libgdi32.dll for tor-print-ed-signing- 7752 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha. 7753 7754 o Minor bugfixes (continuous integration, Windows): 7755 - Explicitly specify the path to the OpenSSL library and do not 7756 download OpenSSL from Pacman, but instead use the library that is 7757 already provided by AppVeyor. Fixes bug 28574; bugfix on master. 7758 7759 o Minor bugfixes (onion service v3): 7760 - When deleting an ephemeral onion service (DEL_ONION), do not close 7761 any rendezvous circuits in order to let the existing client 7762 connections finish by themselves or closed by the application. The 7763 HS v2 is doing that already so now we have the same behavior for 7764 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha. 7765 7766 o Minor bugfixes (restart-in-process, boostrap): 7767 - Add missing resets of bootstrap tracking state when shutting down 7768 (regression caused by ticket 27169). Fixes bug 28524; bugfix 7769 on 0.3.5.1-alpha. 7770 7771 o Minor bugfixes (testing): 7772 - Use a separate DataDirectory for the test_rebind script. 7773 Previously, this script would run using the default DataDirectory, 7774 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha. 7775 Patch from Taylor R Campbell. 7776 - Stop leaking memory in an entry guard unit test. Fixes bug 28554; 7777 bugfix on 0.3.0.1-alpha. 7778 7779 o Minor bugfixes (Windows): 7780 - Correctly identify Windows 8.1, Windows 10, and Windows Server 7781 2008 and later from their NT versions. Fixes bug 28096; bugfix on 7782 0.2.2.34; reported by Keifer Bly. 7783 - On recent Windows versions, the GetVersionEx() function may report 7784 an earlier Windows version than the running OS. To avoid user 7785 confusion, add "[or later]" to Tor's version string on affected 7786 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported 7787 by Keifer Bly. 7788 - Remove Windows versions that were never supported by the 7789 GetVersionEx() function. Stop duplicating the latest Windows 7790 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34; 7791 reported by Keifer Bly. 7792 7793 o Testing: 7794 - Increase logging and tag all log entries with timestamps in 7795 test_rebind.py. Provides diagnostics for issue 28229. 7796 7797 o Code simplification and refactoring (shared random, dirauth): 7798 - Change many tor_assert() to use BUG() instead. The idea is to not 7799 crash a dirauth but rather scream loudly with a stacktrace and let 7800 it continue run. The shared random subsystem is very resilient and 7801 if anything wrong happens with it, at worst a non coherent value 7802 will be put in the vote and discarded by the other authorities. 7803 Closes ticket 19566. 7804 7805 o Documentation (onion services): 7806 - Document in the man page that changing ClientOnionAuthDir value or 7807 adding a new file in the directory will not work at runtime upon 7808 sending a HUP if Sandbox 1. Closes ticket 28128. 7809 - Note in the man page that the only real way to fully revoke an 7810 onion service v3 client authorization is by restarting the tor 7811 process. Closes ticket 28275. 7812 7813 7814Changes in version 0.3.5.5-alpha - 2018-11-16 7815 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases, 7816 including several that we hope to backport to older release series in 7817 the future. 7818 7819 o Major bugfixes (OpenSSL, portability): 7820 - Fix our usage of named groups when running as a TLS 1.3 client in 7821 OpenSSL 1.1.1. Previously, we only initialized EC groups when 7822 running as a relay, which caused clients to fail to negotiate TLS 7823 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3 7824 support was added). 7825 7826 o Minor features (geoip): 7827 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2 7828 Country database. Closes ticket 28395. 7829 7830 o Minor bugfixes (compilation): 7831 - Initialize a variable unconditionally in aes_new_cipher(), since 7832 some compilers cannot tell that we always initialize it before 7833 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha. 7834 7835 o Minor bugfixes (connection, relay): 7836 - Avoid a logging a BUG() stacktrace when closing connection held 7837 open because the write side is rate limited but not the read side. 7838 Now, the connection read side is simply shut down until Tor is 7839 able to flush the connection and close it. Fixes bug 27750; bugfix 7840 on 0.3.4.1-alpha. 7841 7842 o Minor bugfixes (continuous integration, Windows): 7843 - Manually configure the zstd compiler options, when building using 7844 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does 7845 not come with a pkg-config file. Fixes bug 28454; bugfix 7846 on 0.3.4.1-alpha. 7847 - Stop using an external OpenSSL install, and stop installing MSYS2 7848 packages, when building using mingw on Appveyor Windows CI. Fixes 7849 bug 28399; bugfix on 0.3.4.1-alpha. 7850 7851 o Minor bugfixes (documentation): 7852 - Make Doxygen work again after the code movement in the 0.3.5 7853 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha. 7854 7855 o Minor bugfixes (Linux seccomp2 sandbox): 7856 - Permit the "shutdown()" system call, which is apparently used by 7857 OpenSSL under some circumstances. Fixes bug 28183; bugfix 7858 on 0.2.5.1-alpha. 7859 7860 o Minor bugfixes (logging): 7861 - Stop talking about the Named flag in log messages. Clients have 7862 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix 7863 on 0.3.2.1-alpha. 7864 7865 o Minor bugfixes (memory leaks): 7866 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419; 7867 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger. 7868 7869 o Minor bugfixes (onion services): 7870 - On an intro point for a version 3 onion service, stop closing 7871 introduction circuits on an NACK. This lets the client decide 7872 whether to reuse the circuit or discard it. Previously, we closed 7873 intro circuits when sending NACKs. Fixes bug 27841; bugfix on 7874 0.3.2.1-alpha. Patch by Neel Chaunan. 7875 - When replacing a descriptor in the client cache, make sure to 7876 close all client introduction circuits for the old descriptor, so 7877 we don't end up with unusable leftover circuits. Fixes bug 27471; 7878 bugfix on 0.3.2.1-alpha. 7879 7880 7881Changes in version 0.3.5.4-alpha - 2018-11-08 7882 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and 7883 improves our continuous integration support. It continues our attempts 7884 to stabilize this alpha branch and build it into a foundation for an 7885 acceptable long-term-support release. 7886 7887 o Major bugfixes (compilation, rust): 7888 - Rust tests can now build and run successfully with the 7889 --enable-fragile-hardening option enabled. Doing this currently 7890 requires the rust beta channel; it will be possible with stable 7891 rust once Rust version 1.31 is released. Patch from Alex Crichton. 7892 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha. 7893 7894 o Major bugfixes (embedding, main loop): 7895 - When DisableNetwork becomes set, actually disable periodic events 7896 that are already enabled. (Previously, we would refrain from 7897 enabling new ones, but we would leave the old ones turned on.) 7898 Fixes bug 28348; bugfix on 0.3.4.1-alpha. 7899 7900 o Minor features (continuous integration): 7901 - Add a Travis CI build for --enable-nss on Linux gcc. Closes 7902 ticket 27751. 7903 - Add new CI job to Travis configuration to run stem-based 7904 integration tests. Closes ticket 27913. 7905 7906 o Minor features (Windows, continuous integration): 7907 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using 7908 Appveyor's CI. Closes ticket 28318. 7909 7910 o Minor bugfixes (C correctness, also in 0.3.4.9): 7911 - Avoid undefined behavior in an end-of-string check when parsing 7912 the BEGIN line in a directory object. Fixes bug 28202; bugfix 7913 on 0.2.0.3-alpha. 7914 7915 o Minor bugfixes (compilation): 7916 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix 7917 on 0.3.5.1-alpha. Patch from Kris Katterjohn. 7918 7919 o Minor bugfixes (compilation, OpenSolaris): 7920 - Fix compilation on OpenSolaris and its descendants by adding a 7921 missing include to compat_pthreads.c. Fixes bug 27963; bugfix 7922 on 0.3.5.1-alpha. 7923 7924 o Minor bugfixes (configuration): 7925 - Refuse to start with relative file paths and RunAsDaemon set 7926 (regression from the fix for bug 22731). Fixes bug 28298; bugfix 7927 on 0.3.3.1-alpha. 7928 7929 o Minor bugfixes (directory authority, also in 0.3.4.9): 7930 - Log additional info when we get a relay that shares an ed25519 ID 7931 with a different relay, instead of a BUG() warning with a 7932 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha. 7933 7934 o Minor bugfixes (onion service v3): 7935 - Build the service descriptor's signing key certificate before 7936 uploading, so we always have a fresh one: leaving no chances for 7937 it to expire service side. Fixes bug 27838; bugfix 7938 on 0.3.2.1-alpha. 7939 7940 o Minor bugfixes (onion service v3, client authorization): 7941 - Fix an assert() when adding a client authorization for the first 7942 time and then sending a HUP signal to the service. Before that, 7943 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha. 7944 7945 o Minor bugfixes (onion services): 7946 - Unless we have explicitly set HiddenServiceVersion, detect the 7947 onion service version and then look for invalid options. 7948 Previously, we did the reverse, but that broke existing configs 7949 which were pointed to a v2 service and had options like 7950 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on 7951 0.3.5.1-alpha. Patch by Neel Chauhan. 7952 7953 o Minor bugfixes (portability): 7954 - Make the OPE code (which is used for v3 onion services) run 7955 correctly on big-endian platforms. Fixes bug 28115; bugfix 7956 on 0.3.5.1-alpha. 7957 7958 o Minor bugfixes (protover, rust): 7959 - Reject extra commas in version strings. Fixes bug 27197; bugfix 7960 on 0.3.3.3-alpha. 7961 7962 o Minor bugfixes (relay shutdown, systemd): 7963 - Notify systemd of ShutdownWaitLength so it can be set to longer 7964 than systemd's TimeoutStopSec. In Tor's systemd service file, set 7965 TimeoutSec to 60 seconds to allow Tor some time to shut down. 7966 Fixes bug 28113; bugfix on 0.2.6.2-alpha. 7967 7968 o Minor bugfixes (rust, also in 0.3.4.9): 7969 - Fix a potential null dereference in protover_all_supported(). Add 7970 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha. 7971 - Return a string that can be safely freed by C code, not one 7972 created by the rust allocator, in protover_all_supported(). Fixes 7973 bug 27740; bugfix on 0.3.3.1-alpha. 7974 7975 o Minor bugfixes (rust, directory authority, also in 0.3.4.9): 7976 - Fix an API mismatch in the rust implementation of 7977 protover_compute_vote(). This bug could have caused crashes on any 7978 directory authorities running Tor with Rust (which we do not yet 7979 recommend). Fixes bug 27741; bugfix on 0.3.3.6. 7980 7981 o Minor bugfixes (testing): 7982 - Avoid hangs and race conditions in test_rebind.py. Fixes bug 7983 27968; bugfix on 0.3.5.1-alpha. 7984 7985 o Minor bugfixes (testing, also in 0.3.4.9): 7986 - Treat backtrace test failures as expected on BSD-derived systems 7987 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808. 7988 (FreeBSD failures have been treated as expected since 18204 in 7989 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha. 7990 7991 o Documentation (onion service manpage): 7992 - Improve HSv3 client authorization by making some options more 7993 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas. 7994 7995 7996Changes in version 0.3.4.9 - 2018-11-02 7997 Tor 0.3.4.9 is the second stable release in its series; it backports 7998 numerous fixes, including a fix for a bandwidth management bug that 7999 was causing memory exhaustion on relays. Anyone running an earlier 8000 version of Tor 0.3.4.9 should upgrade. 8001 8002 o Major bugfixes (compilation, backport from 0.3.5.3-alpha): 8003 - Fix compilation on ARM (and other less-used CPUs) when compiling 8004 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha. 8005 8006 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha): 8007 - Make sure Tor bootstraps and works properly if only the 8008 ControlPort is set. Prior to this fix, Tor would only bootstrap 8009 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel 8010 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha. 8011 8012 o Major bugfixes (relay, backport from 0.3.5.3-alpha): 8013 - When our write bandwidth limit is exhausted, stop writing on the 8014 connection. Previously, we had a typo in the code that would make 8015 us stop reading instead, leading to relay connections being stuck 8016 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix 8017 on 0.3.4.1-alpha. 8018 8019 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha): 8020 - Fix a use-after-free error that could be caused by passing Tor an 8021 impossible set of options that would fail during options_act(). 8022 Fixes bug 27708; bugfix on 0.3.3.1-alpha. 8023 8024 o Minor features (continuous integration, backport from 0.3.5.1-alpha): 8025 - Don't do a distcheck with --disable-module-dirauth in Travis. 8026 Implements ticket 27252. 8027 - Only run one online rust build in Travis, to reduce network 8028 errors. Skip offline rust builds on Travis for Linux gcc, because 8029 they're redundant. Implements ticket 27252. 8030 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a 8031 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on 8032 Linux with default settings, because all the non-default builds 8033 use gcc on Linux. Implements ticket 27252. 8034 8035 o Minor features (continuous integration, backport from 0.3.5.3-alpha): 8036 - Use the Travis Homebrew addon to install packages on macOS during 8037 Travis CI. The package list is the same, but the Homebrew addon 8038 does not do a `brew update` by default. Implements ticket 27738. 8039 8040 o Minor features (geoip): 8041 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2 8042 Country database. Closes ticket 27991. 8043 8044 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha): 8045 - Fix an integer overflow bug in our optimized 32-bit millisecond- 8046 difference algorithm for 32-bit Apple platforms. Previously, it 8047 would overflow when calculating the difference between two times 8048 more than 47 days apart. Fixes part of bug 27139; bugfix 8049 on 0.3.4.1-alpha. 8050 - Improve the precision of our 32-bit millisecond difference 8051 algorithm for 32-bit Apple platforms. Fixes part of bug 27139; 8052 bugfix on 0.3.4.1-alpha. 8053 - Relax the tolerance on the mainloop/update_time_jumps test when 8054 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix 8055 on 0.3.4.1-alpha. 8056 8057 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha): 8058 - Avoid undefined behavior in an end-of-string check when parsing 8059 the BEGIN line in a directory object. Fixes bug 28202; bugfix 8060 on 0.2.0.3-alpha. 8061 8062 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha): 8063 - Only install the necessary mingw packages during our appveyor 8064 builds. This change makes the build a little faster, and prevents 8065 a conflict with a preinstalled mingw openssl that appveyor now 8066 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha. 8067 8068 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha): 8069 - Rewrite our assertion macros so that they no longer suppress the 8070 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix 8071 8072 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha): 8073 - Stop reinstalling identical packages in our Windows CI. Fixes bug 8074 27464; bugfix on 0.3.4.1-alpha. 8075 8076 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha): 8077 - Log additional info when we get a relay that shares an ed25519 ID 8078 with a different relay, instead making a BUG() warning. Fixes bug 8079 27800; bugfix on 0.3.2.1-alpha. 8080 8081 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha): 8082 - Avoid a double-close when shutting down a stalled directory 8083 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha. 8084 8085 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha): 8086 - Fix a bug warning when closing an HTTP tunnel connection due to an 8087 HTTP request we couldn't handle. Fixes bug 26470; bugfix 8088 on 0.3.2.1-alpha. 8089 8090 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha): 8091 - Ensure circuitmux queues are empty before scheduling or sending 8092 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha. 8093 8094 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha): 8095 - When the onion service directory can't be created or has the wrong 8096 permissions, do not log a stack trace. Fixes bug 27335; bugfix 8097 on 0.3.2.1-alpha. 8098 8099 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha): 8100 - Close all SOCKS request (for the same .onion) if the newly fetched 8101 descriptor is unusable. Before that, we would close only the first 8102 one leaving the other hanging and let to time out by themselves. 8103 Fixes bug 27410; bugfix on 0.3.2.1-alpha. 8104 8105 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha): 8106 - When selecting a v3 rendezvous point, don't only look at the 8107 protover, but also check whether the curve25519 onion key is 8108 present. This way we avoid picking a relay that supports the v3 8109 rendezvous but for which we don't have the microdescriptor. Fixes 8110 bug 27797; bugfix on 0.3.2.1-alpha. 8111 8112 o Minor bugfixes (protover, backport from 0.3.5.3-alpha): 8113 - Reject protocol names containing bytes other than alphanumeric 8114 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix 8115 on 0.2.9.4-alpha. 8116 8117 o Minor bugfixes (rust, backport from 0.3.5.1-alpha): 8118 - Compute protover votes correctly in the rust version of the 8119 protover code. Previously, the protover rewrite in 24031 allowed 8120 repeated votes from the same voter for the same protocol version 8121 to be counted multiple times in protover_compute_vote(). Fixes bug 8122 27649; bugfix on 0.3.3.5-rc. 8123 - Reject protover names that contain invalid characters. Fixes bug 8124 27687; bugfix on 0.3.3.1-alpha. 8125 8126 o Minor bugfixes (rust, backport from 0.3.5.2-alpha): 8127 - protover_all_supported() would attempt to allocate up to 16GB on 8128 some inputs, leading to a potential memory DoS. Fixes bug 27206; 8129 bugfix on 0.3.3.5-rc. 8130 8131 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha): 8132 - Fix an API mismatch in the rust implementation of 8133 protover_compute_vote(). This bug could have caused crashes on any 8134 directory authorities running Tor with Rust (which we do not yet 8135 recommend). Fixes bug 27741; bugfix on 0.3.3.6. 8136 8137 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha): 8138 - Fix a potential null dereference in protover_all_supported(). Add 8139 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha. 8140 - Return a string that can be safely freed by C code, not one 8141 created by the rust allocator, in protover_all_supported(). Fixes 8142 bug 27740; bugfix on 0.3.3.1-alpha. 8143 8144 o Minor bugfixes (testing, backport from 0.3.5.1-alpha): 8145 - If a unit test running in a subprocess exits abnormally or with a 8146 nonzero status code, treat the test as having failed, even if the 8147 test reported success. Without this fix, memory leaks don't cause 8148 the tests to fail, even with LeakSanitizer. Fixes bug 27658; 8149 bugfix on 0.2.2.4-alpha. 8150 8151 o Minor bugfixes (testing, backport from 0.3.5.3-alpha): 8152 - Make the hs_service tests use the same time source when creating 8153 the introduction point and when testing it. Now tests work better 8154 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix 8155 on 0.3.2.1-alpha. 8156 8157 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha): 8158 - Treat backtrace test failures as expected on BSD-derived systems 8159 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808. 8160 (FreeBSD failures have been treated as expected since 18204 in 8161 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha. 8162 8163 8164Changes in version 0.3.5.3-alpha - 2018-10-17 8165 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x 8166 versions. One important fix for relays addresses a problem with rate- 8167 limiting code from back in 0.3.4.x: If the fix works out, we'll be 8168 backporting it soon. This release is still an alpha, but we hope it's 8169 getting closer and closer to stability. 8170 8171 o Major features (onion services): 8172 - Version 3 onion services can now use the per-service 8173 HiddenServiceExportCircuitID option to differentiate client 8174 circuits. It communicates with the service by using the HAProxy 8175 protocol to assign virtual IP addresses to inbound client 8176 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi. 8177 8178 o Major bugfixes (compilation): 8179 - Fix compilation on ARM (and other less-used CPUs) when compiling 8180 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha. 8181 8182 o Major bugfixes (initialization, crash): 8183 - Fix an assertion crash that would stop Tor from starting up if it 8184 tried to activate a periodic event too early. Fixes bug 27861; 8185 bugfix on 0.3.5.1-alpha. 8186 8187 o Major bugfixes (mainloop, bootstrap): 8188 - Make sure Tor bootstraps and works properly if only the 8189 ControlPort is set. Prior to this fix, Tor would only bootstrap 8190 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel 8191 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha. 8192 8193 o Major bugfixes (relay): 8194 - When our write bandwidth limit is exhausted, stop writing on the 8195 connection. Previously, we had a typo in the code that would make 8196 us stop reading instead, leading to relay connections being stuck 8197 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix 8198 on 0.3.4.1-alpha. 8199 8200 o Minor features (continuous integration): 8201 - Use the Travis Homebrew addon to install packages on macOS during 8202 Travis CI. The package list is the same, but the Homebrew addon 8203 does not do a `brew update` by default. Implements ticket 27738. 8204 - Report what program produced the mysterious core file that we 8205 occasionally see on Travis CI during make distcheck. Closes 8206 ticket 28024. 8207 8208 o Minor features (geoip): 8209 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2 8210 Country database. Closes ticket 27991. 8211 8212 o Minor bugfixes (code safety): 8213 - Rewrite our assertion macros so that they no longer suppress the 8214 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix 8215 on 0.0.6. 8216 8217 o Minor bugfixes (compilation): 8218 - Compile the ed25519-donna code with a correct declaration of 8219 crypto_strongest_rand(). Previously, we built it with one type, 8220 but linked it against another in the unit tests, which caused 8221 compilation failures with LTO enabled. This could have caused 8222 other undefined behavior in the tests. Fixes bug 27728; bugfix 8223 on 0.3.5.1-alpha. 8224 8225 o Minor bugfixes (compilation, netbsd): 8226 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix 8227 on 0.3.5.1-alpha. 8228 8229 o Minor bugfixes (continuous integration, appveyor): 8230 - Install only the necessary mingw packages during our appveyor 8231 builds. This change makes the build a little faster, and prevents 8232 a conflict with a preinstalled mingw openssl that appveyor now 8233 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha. 8234 8235 o Minor bugfixes (directory permissions): 8236 - When a user requests a group-readable DataDirectory, give it to 8237 them. Previously, when the DataDirectory and the CacheDirectory 8238 were the same, the default setting (0) for 8239 CacheDirectoryGroupReadable would override the setting for 8240 DataDirectoryGroupReadable. Fixes bug 26913; bugfix 8241 on 0.3.3.1-alpha. 8242 8243 o Minor bugfixes (memory leaks): 8244 - Fix a small memory leak when calling Tor with --dump-config. Fixes 8245 bug 27893; bugfix on 0.3.2.1-alpha. 8246 8247 o Minor bugfixes (networking): 8248 - In retry_listeners_ports(), make sure that we're removing a member 8249 of old_conns smartlist at most once. Fixes bug 27808; bugfix 8250 on 0.3.5.1-alpha. 8251 - Refrain from attempting socket rebinding when old and new 8252 listeners are in different address families. Fixes bug 27928; 8253 bugfix on 0.3.5.1-alpha. 8254 8255 o Minor bugfixes (onion service v3): 8256 - Stop dumping a stack trace when trying to connect to an intro 8257 point without having a descriptor for it. Fixes bug 27774; bugfix 8258 on 0.3.2.1-alpha. 8259 - Don't warn so loudly when Tor is unable to decode an onion 8260 descriptor. This can now happen as a normal use case if a client 8261 gets a descriptor with client authorization but the client is not 8262 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha. 8263 - When selecting a v3 rendezvous point, don't only look at the 8264 protover, but also check whether the curve25519 onion key is 8265 present. This way we avoid picking a relay that supports the v3 8266 rendezvous but for which we don't have the microdescriptor. Fixes 8267 bug 27797; bugfix on 0.3.2.1-alpha. 8268 8269 o Minor bugfixes (protover): 8270 - Reject protocol names containing bytes other than alphanumeric 8271 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix 8272 on 0.2.9.4-alpha. 8273 8274 o Minor bugfixes (testing): 8275 - Make the hs_service tests use the same time source when creating 8276 the introduction point and when testing it. Now tests work better 8277 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix 8278 on 0.3.2.1-alpha. 8279 - In test_rebind.py, check if the Python version is in the supported 8280 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha. 8281 8282 o Code simplification and refactoring: 8283 - Divide more large Tor source files -- especially ones that span 8284 multiple areas of functionality -- into smaller parts, including 8285 onion.c and main.c. Closes ticket 26747. 8286 - Divide the "routerparse.c" module into separate modules for each 8287 group of parsed objects. Closes ticket 27924. 8288 - Move protover_rust.c to the same place protover.c was moved to. 8289 Closes ticket 27814. 8290 - Split directory.c into separate pieces for client, server, and 8291 common functionality. Closes ticket 26744. 8292 - Split the non-statistics-related parts from the rephist.c and 8293 geoip.c modules. Closes ticket 27892. 8294 - Split the router.c file into relay-only and shared components, to 8295 help with future modularization. Closes ticket 27864. 8296 8297 o Documentation: 8298 - In the tor-resolve(1) manpage, fix the reference to socks- 8299 extensions.txt by adding a web URL. Resolves ticket 27853. 8300 - Mention that we require Python to be 2.7 or newer for some 8301 integration tests that we ship with Tor. Resolves ticket 27677. 8302 8303 8304Changes in version 0.3.5.2-alpha - 2018-09-21 8305 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one 8306 that made Tor think it had run out of sockets. Anybody running a relay 8307 or an onion service on 0.3.5.1-alpha should upgrade. 8308 8309 o Major bugfixes (relay bandwidth statistics): 8310 - When we close relayed circuits, report the data in the circuit 8311 queues as being written in our relay bandwidth stats. This 8312 mitigates guard discovery and other attacks that close circuits 8313 for the explicit purpose of noticing this discrepancy in 8314 statistics. Fixes bug 23512; bugfix on 0.0.8pre3. 8315 8316 o Major bugfixes (socket accounting): 8317 - In our socket accounting code, count a socket as closed even when 8318 it is closed indirectly by the TLS layer. Previously, we would 8319 count these sockets as still in use, and incorrectly believe that 8320 we had run out of sockets. Fixes bug 27795; bugfix 8321 on 0.3.5.1-alpha. 8322 8323 o Minor bugfixes (32-bit OSX and iOS, timing): 8324 - Fix an integer overflow bug in our optimized 32-bit millisecond- 8325 difference algorithm for 32-bit Apple platforms. Previously, it 8326 would overflow when calculating the difference between two times 8327 more than 47 days apart. Fixes part of bug 27139; bugfix 8328 on 0.3.4.1-alpha. 8329 - Improve the precision of our 32-bit millisecond difference 8330 algorithm for 32-bit Apple platforms. Fixes part of bug 27139; 8331 bugfix on 0.3.4.1-alpha. 8332 - Relax the tolerance on the mainloop/update_time_jumps test when 8333 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix 8334 on 0.3.4.1-alpha. 8335 8336 o Minor bugfixes (onion service v3): 8337 - Close all SOCKS request (for the same .onion) if the newly fetched 8338 descriptor is unusable. Before that, we would close only the first 8339 one leaving the other hanging and let to time out by themselves. 8340 Fixes bug 27410; bugfix on 0.3.2.1-alpha. 8341 8342 o Minor bugfixes (memory leak): 8343 - Fix an unlikely memory leak when trying to read a private key from 8344 a ridiculously large file. Fixes bug 27764; bugfix on 8345 0.3.5.1-alpha. This is CID 1439488. 8346 8347 o Minor bugfixes (NSS): 8348 - Correctly detect failure to open a dummy TCP socket when stealing 8349 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix 8350 on 0.3.5.1-alpha. 8351 8352 o Minor bugfixes (rust): 8353 - protover_all_supported() would attempt to allocate up to 16GB on 8354 some inputs, leading to a potential memory DoS. Fixes bug 27206; 8355 bugfix on 0.3.3.5-rc. 8356 8357 o Minor bugfixes (testing): 8358 - Revise the "conditionvar_timeout" test so that it succeeds even on 8359 heavily loaded systems where the test threads are not scheduled 8360 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha. 8361 8362 o Code simplification and refactoring: 8363 - Divide the routerlist.c and dirserv.c modules into smaller parts. 8364 Closes ticket 27799. 8365 8366 8367Changes in version 0.3.5.1-alpha - 2018-09-18 8368 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds 8369 client authorization for modern (v3) onion services, improves 8370 bootstrap reporting, begins reorganizing Tor's codebase, adds optional 8371 support for NSS in place of OpenSSL, and much more. 8372 8373 o Major features (onion services, UI change): 8374 - For a newly created onion service, the default version is now 3. 8375 Tor still supports existing version 2 services, but the operator 8376 now needs to set "HiddenServiceVersion 2" in order to create a new 8377 version 2 service. For existing services, Tor now learns the 8378 version by reading the key file. Closes ticket 27215. 8379 8380 o Major features (relay, UI change): 8381 - Relays no longer run as exits by default. If the "ExitRelay" 8382 option is auto (or unset), and no exit policy is specified with 8383 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0. 8384 Previously in this case, we allowed exit traffic and logged a 8385 warning message. Closes ticket 21530. Patch by Neel Chauhan. 8386 - Tor now validates that the ContactInfo config option is valid UTF- 8387 8 when parsing torrc. Closes ticket 27428. 8388 8389 o Major features (bootstrap): 8390 - Don't report directory progress until after a connection to a 8391 relay or bridge has succeeded. Previously, we'd report 80% 8392 progress based on cached directory information when we couldn't 8393 even connect to the network. Closes ticket 27169. 8394 8395 o Major features (new code layout): 8396 - Nearly all of Tor's source code has been moved around into more 8397 logical places. The "common" directory is now divided into a set 8398 of libraries in "lib", and files in the "or" directory have been 8399 split into "core" (logic absolutely needed for onion routing), 8400 "feature" (independent modules in Tor), and "app" (to configure 8401 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for 8402 more information. Closes ticket 26481. 8403 8404 This refactoring is not complete: although the libraries have been 8405 refactored to be acyclic, the main body of Tor is still too 8406 interconnected. We will attempt to improve this in the future. 8407 8408 o Major features (onion services v3): 8409 - Implement onion service client authorization at the descriptor 8410 level: only authorized clients can decrypt a service's descriptor 8411 to find out how to contact it. A new torrc option was added to 8412 control this client side: ClientOnionAuthDir <path>. On the 8413 service side, if the "authorized_clients/" directory exists in the 8414 onion service directory path, client configurations are read from 8415 the files within. See the manpage for more details. Closes ticket 8416 27547. Patch done by Suphanat Chunhapanya (haxxpop). 8417 - Improve revision counter generation in next-gen onion services. 8418 Onion services can now scale by hosting multiple instances on 8419 different hosts without synchronization between them, which was 8420 previously impossible because descriptors would get rejected by 8421 HSDirs. Addresses ticket 25552. 8422 8423 o Major features (portability, cryptography, experimental, TLS): 8424 - Tor now has the option to compile with the NSS library instead of 8425 OpenSSL. This feature is experimental, and we expect that bugs may 8426 remain. It is mainly intended for environments where Tor's 8427 performance is not CPU-bound, and where NSS is already known to be 8428 installed. To try it out, configure Tor with the --enable-nss 8429 flag. Closes tickets 26631, 26815, and 26816. 8430 8431 If you are experimenting with this option and using an old cached 8432 consensus, Tor may fail to start. To solve this, delete your 8433 "cached-consensus" and "cached-microdesc-consensus" files, 8434 (if present), and restart Tor. 8435 8436 o Major bugfixes (directory authority): 8437 - Actually check that the address we get from DirAuthority 8438 configuration line is valid IPv4. Explicitly disallow DirAuthority 8439 address to be a DNS hostname. Fixes bug 26488; bugfix 8440 on 0.1.2.10-rc. 8441 8442 o Major bugfixes (restart-in-process): 8443 - Fix a use-after-free error that could be caused by passing Tor an 8444 impossible set of options that would fail during options_act(). 8445 Fixes bug 27708; bugfix on 0.3.3.1-alpha. 8446 8447 o Minor features (admin tools): 8448 - Add a new --key-expiration option to print the expiration date of 8449 the signing cert in an ed25519_signing_cert file. Resolves 8450 issue 19506. 8451 8452 o Minor features (build): 8453 - If you pass the "--enable-pic" option to configure, Tor will try 8454 to tell the compiler to build position-independent code suitable 8455 to link into a dynamic library. (The default remains -fPIE, for 8456 code suitable for a relocatable executable.) Closes ticket 23846. 8457 8458 o Minor features (code correctness, testing): 8459 - Tor's build process now includes a "check-includes" make target to 8460 verify that no module of Tor relies on any headers from a higher- 8461 level module. We hope to use this feature over time to help 8462 refactor our codebase. Closes ticket 26447. 8463 8464 o Minor features (code layout): 8465 - We have a new "lowest-level" error-handling API for use by code 8466 invoked from within the logging module. With this interface, the 8467 logging code is no longer at risk of calling into itself if a 8468 failure occurs while it is trying to log something. Closes 8469 ticket 26427. 8470 8471 o Minor features (compilation): 8472 - Tor's configure script now supports a --with-malloc= option to 8473 select your malloc implementation. Supported options are 8474 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the 8475 default). Addresses part of ticket 20424. Based on a patch from 8476 Alex Xu. 8477 8478 o Minor features (config): 8479 - The "auto" keyword in torrc is now case-insensitive. Closes 8480 ticket 26663. 8481 8482 o Minor features (continuous integration): 8483 - Don't do a distcheck with --disable-module-dirauth in Travis. 8484 Implements ticket 27252. 8485 - Install libcap-dev and libseccomp2-dev so these optional 8486 dependencies get tested on Travis CI. Closes ticket 26560. 8487 - Only run one online rust build in Travis, to reduce network 8488 errors. Skip offline rust builds on Travis for Linux gcc, because 8489 they're redundant. Implements ticket 27252. 8490 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a 8491 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on 8492 Linux with default settings, because all the non-default builds 8493 use gcc on Linux. Implements ticket 27252. 8494 8495 o Minor features (controller): 8496 - Emit CIRC_BW events as soon as we detect that we processed an 8497 invalid or otherwise dropped cell on a circuit. This allows 8498 vanguards and other controllers to react more quickly to dropped 8499 cells. Closes ticket 27678. 8500 - For purposes of CIRC_BW-based dropped cell detection, track half- 8501 closed stream ids, and allow their ENDs, SENDMEs, DATA and path 8502 bias check cells to arrive without counting it as dropped until 8503 either the END arrives, or the windows are empty. Closes 8504 ticket 25573. 8505 - Implement a 'GETINFO md/all' controller command to enable getting 8506 all known microdescriptors. Closes ticket 8323. 8507 - The GETINFO command now support an "uptime" argument, to return 8508 Tor's uptime in seconds. Closes ticket 25132. 8509 8510 o Minor features (denial-of-service avoidance): 8511 - Make our OOM handler aware of the DNS cache so that it doesn't 8512 fill up the memory. This check is important for our DoS mitigation 8513 subsystem. Closes ticket 18642. Patch by Neel Chauhan. 8514 8515 o Minor features (development): 8516 - Tor's makefile now supports running the "clippy" Rust style tool 8517 on our Rust code. Closes ticket 22156. 8518 8519 o Minor features (directory authority): 8520 - There is no longer an artificial upper limit on the length of 8521 bandwidth lines. Closes ticket 26223. 8522 - When a bandwidth file is used to obtain the bandwidth measurements, 8523 include this bandwidth file headers in the votes. Closes 8524 ticket 3723. 8525 - Improved support for networks with only a single authority or a 8526 single fallback directory. Patch from Gabriel Somlo. Closes 8527 ticket 25928. 8528 8529 o Minor features (embedding API): 8530 - The Tor controller API now supports a function to launch Tor with 8531 a preconstructed owning controller FD, so that embedding 8532 applications don't need to manage controller ports and 8533 authentication. Closes ticket 24204. 8534 - The Tor controller API now has a function that returns the name 8535 and version of the backend implementing the API. Closes 8536 ticket 26947. 8537 8538 o Minor features (geoip): 8539 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2 8540 Country database. Closes ticket 27631. 8541 8542 o Minor features (memory management): 8543 - Get Libevent to use the same memory allocator as Tor, by calling 8544 event_set_mem_functions() during initialization. Resolves 8545 ticket 8415. 8546 8547 o Minor features (memory usage): 8548 - When not using them, store legacy TAP public onion keys in DER- 8549 encoded format, rather than as expanded public keys. This should 8550 save several megabytes on typical clients. Closes ticket 27246. 8551 8552 o Minor features (OpenSSL): 8553 - When possible, use RFC5869 HKDF implementation from OpenSSL rather 8554 than our own. Resolves ticket 19979. 8555 8556 o Minor features (Rust, code quality): 8557 - Improve rust code quality in the rust protover implementation by 8558 making it more idiomatic. Includes changing an internal API to 8559 take &str instead of &String. Closes ticket 26492. 8560 8561 o Minor features (testing): 8562 - Add scripts/test/chutney-git-bisect.sh, for bisecting using 8563 chutney. Implements ticket 27211. 8564 8565 o Minor features (tor-resolve): 8566 - The tor-resolve utility can now be used with IPv6 SOCKS proxies. 8567 Side-effect of the refactoring for ticket 26526. 8568 8569 o Minor features (UI): 8570 - Log each included configuration file or directory as we read it, 8571 to provide more visibility about where Tor is reading from. Patch 8572 from Unto Sten; closes ticket 27186. 8573 - Lower log level of "Scheduler type KIST has been enabled" to INFO. 8574 Closes ticket 26703. 8575 8576 o Minor bugfixes (bootstrap): 8577 - Try harder to get descriptors in non-exit test networks, by using 8578 the mid weight for the third hop when there are no exits. Fixes 8579 bug 27237; bugfix on 0.2.6.2-alpha. 8580 8581 o Minor bugfixes (C correctness): 8582 - Avoid casting smartlist index to int implicitly, as it may trigger 8583 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on 8584 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha. 8585 - Use time_t for all values in 8586 predicted_ports_prediction_time_remaining(). Rework the code that 8587 computes difference between durations/timestamps. Fixes bug 27165; 8588 bugfix on 0.3.1.1-alpha. 8589 8590 o Minor bugfixes (client, memory usage): 8591 - When not running as a directory cache, there is no need to store 8592 the text of the current consensus networkstatus in RAM. 8593 Previously, however, clients would store it anyway, at a cost of 8594 over 5 MB. Now, they do not. Fixes bug 27247; bugfix 8595 on 0.3.0.1-alpha. 8596 8597 o Minor bugfixes (client, reachableaddresses): 8598 - Instead of adding a "reject *:*" line to ReachableAddresses when 8599 loading the configuration, add one to the policy after parsing it 8600 in parse_reachable_addresses(). This prevents extra "reject *.*" 8601 lines from accumulating on reloads. Fixes bug 20874; bugfix on 8602 0.1.1.5-alpha. Patch by Neel Chauhan. 8603 8604 o Minor bugfixes (code quality): 8605 - Rename sandbox_getaddrinfo() and other functions to no longer 8606 misleadingly suggest that they are sandbox-only. Fixes bug 26525; 8607 bugfix on 0.2.7.1-alpha. 8608 8609 o Minor bugfixes (configuration, Onion Services): 8610 - In rend_service_parse_port_config(), disallow any input to remain 8611 after address-port pair was parsed. This will catch address and 8612 port being whitespace-separated by mistake of the user. Fixes bug 8613 27044; bugfix on 0.2.9.10. 8614 8615 o Minor bugfixes (continuous integration): 8616 - Stop reinstalling identical packages in our Windows CI. Fixes bug 8617 27464; bugfix on 0.3.4.1-alpha. 8618 8619 o Minor bugfixes (controller): 8620 - Consider all routerinfo errors other than "not a server" to be 8621 transient for the purpose of "GETINFO exit-policy/*" controller 8622 request. Print stacktrace in the unlikely case of failing to 8623 recompute routerinfo digest. Fixes bug 27034; bugfix 8624 on 0.3.4.1-alpha. 8625 8626 o Minor bugfixes (directory connection shutdown): 8627 - Avoid a double-close when shutting down a stalled directory 8628 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha. 8629 8630 o Minor bugfixes (HTTP tunnel): 8631 - Fix a bug warning when closing an HTTP tunnel connection due to an 8632 HTTP request we couldn't handle. Fixes bug 26470; bugfix 8633 on 0.3.2.1-alpha. 8634 8635 o Minor bugfixes (ipv6): 8636 - In addrs_in_same_network_family(), we choose the subnet size based 8637 on the IP version (IPv4 or IPv6). Previously, we chose a fixed 8638 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug 8639 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan. 8640 8641 o Minor bugfixes (logging): 8642 - As a precaution, do an early return from log_addr_has_changed() if 8643 Tor is running as client. Also, log a stack trace for debugging as 8644 this function should only be called when Tor runs as server. Fixes 8645 bug 26892; bugfix on 0.1.1.9-alpha. 8646 - Refrain from mentioning bug 21018 in the logs, as it is already 8647 fixed. Fixes bug 25477; bugfix on 0.2.9.8. 8648 8649 o Minor bugfixes (logging, documentation): 8650 - When SafeLogging is enabled, scrub IP address in 8651 channel_tls_process_netinfo_cell(). Also, add a note to manpage 8652 that scrubbing is not guaranteed on loglevels below Notice. Fixes 8653 bug 26882; bugfix on 0.2.4.10-alpha. 8654 8655 o Minor bugfixes (netflow padding): 8656 - Ensure circuitmux queues are empty before scheduling or sending 8657 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha. 8658 8659 o Minor bugfixes (onion service v2): 8660 - Log at level "info", not "warning", in the case that we do not 8661 have a consensus when a .onion request comes in. This can happen 8662 normally while bootstrapping. Fixes bug 27040; bugfix 8663 on 0.2.8.2-alpha. 8664 8665 o Minor bugfixes (onion service v3): 8666 - When the onion service directory can't be created or has the wrong 8667 permissions, do not log a stack trace. Fixes bug 27335; bugfix 8668 on 0.3.2.1-alpha. 8669 8670 o Minor bugfixes (OS compatibility): 8671 - Properly handle configuration changes that move a listener to/from 8672 wildcard IP address. If the first attempt to bind a socket fails, 8673 close the old listener and try binding the socket again. Fixes bug 8674 17873; bugfix on 0.0.8pre-1. 8675 8676 o Minor bugfixes (performance):: 8677 - Rework node_is_a_configured_bridge() to no longer call 8678 node_get_all_orports(), which was performing too many memory 8679 allocations. Fixes bug 27224; bugfix on 0.2.3.9. 8680 8681 o Minor bugfixes (relay statistics): 8682 - Update relay descriptor on bandwidth changes only when the uptime 8683 is smaller than 24h, in order to reduce the efficiency of guard 8684 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha. 8685 8686 o Minor bugfixes (relays): 8687 - Consider the fact that we'll be making direct connections to our 8688 entry and guard nodes when computing the fraction of nodes that 8689 have their descriptors. Also, if we are using bridges and there is 8690 at least one bridge with a full descriptor, treat the fraction of 8691 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha. 8692 Patch by Neel Chauhan. 8693 - Update the message logged on relays when DirCache is disabled. 8694 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the 8695 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc. 8696 8697 o Minor bugfixes (rust, protover): 8698 - Compute protover votes correctly in the rust version of the 8699 protover code. Previously, the protover rewrite in 24031 allowed 8700 repeated votes from the same voter for the same protocol version 8701 to be counted multiple times in protover_compute_vote(). Fixes bug 8702 27649; bugfix on 0.3.3.5-rc. 8703 - Reject protover names that contain invalid characters. Fixes bug 8704 27687; bugfix on 0.3.3.1-alpha. 8705 8706 o Minor bugfixes (testing): 8707 - Fix two unit tests to work when HOME environment variable is not 8708 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha. 8709 - If a unit test running in a subprocess exits abnormally or with a 8710 nonzero status code, treat the test as having failed, even if the 8711 test reported success. Without this fix, memory leaks don't cause 8712 the tests to fail, even with LeakSanitizer. Fixes bug 27658; 8713 bugfix on 0.2.2.4-alpha. 8714 - When logging a version mismatch in our openssl_version tests, 8715 report the actual offending version strings. Fixes bug 26152; 8716 bugfix on 0.2.9.1-alpha. 8717 - Fix forking tests on Windows when there is a space somewhere in 8718 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha. 8719 8720 o Code simplification and refactoring: 8721 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not 8722 longer needed. Closes ticket 26502. 8723 - Include paths to header files within Tor are now qualified by 8724 directory within the top-level src directory. 8725 - Many structures have been removed from the centralized "or.h" 8726 header, and moved into their own headers. This will allow us to 8727 reduce the number of places in the code that rely on each 8728 structure's contents and layout. Closes ticket 26383. 8729 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527. 8730 - Remove GetAdaptersAddresses_fn_t. The code that used it was 8731 removed as part of the 26481 refactor. Closes ticket 27467. 8732 - Rework Tor SOCKS server code to use Trunnel and benefit from 8733 autogenerated functions for parsing and generating SOCKS wire 8734 format. New implementation is cleaner, more maintainable and 8735 should be less prone to heartbleed-style vulnerabilities. 8736 Implements a significant fraction of ticket 3569. 8737 - Split sampled_guards_update_from_consensus() and 8738 select_entry_guard_for_circuit() into subfunctions. In 8739 entry_guards_update_primary() unite three smartlist enumerations 8740 into one and move smartlist comparison code out of the function. 8741 Closes ticket 21349. 8742 - Tor now assumes that you have standards-conformant stdint.h and 8743 inttypes.h headers when compiling. Closes ticket 26626. 8744 - Unify our bloom filter logic. Previously we had two copies of this 8745 code: one for routerlist filtering, and one for address set 8746 calculations. Closes ticket 26510. 8747 - Use the simpler strcmpstart() helper in 8748 rend_parse_v2_service_descriptor instead of strncmp(). Closes 8749 ticket 27630. 8750 - Utility functions that can perform a DNS lookup are now wholly 8751 separated from those that can't, in separate headers and C 8752 modules. Closes ticket 26526. 8753 8754 o Documentation: 8755 - Copy paragraph and URL to Tor's code of conduct document from 8756 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638. 8757 - Remove old instructions from INSTALL document. Closes ticket 26588. 8758 - Warn users that they should not include MyFamily line(s) in their 8759 torrc when running Tor bridge. Closes ticket 26908. 8760 8761 o Removed features: 8762 - Tor no longer supports building with the dmalloc library. For 8763 debugging memory issues, we suggest using gperftools or msan 8764 instead. Closes ticket 26426. 8765 - Tor no longer attempts to run on Windows environments without the 8766 GetAdaptersAddresses() function. This function has existed since 8767 Windows XP, which is itself already older than we support. 8768 - Remove Tor2web functionality for version 2 onion services. The 8769 Tor2webMode and Tor2webRendezvousPoints options are now obsolete. 8770 (This feature was never shipped in vanilla Tor and it was only 8771 possible to use this feature by building the support at compile 8772 time. Tor2webMode is not implemented for version 3 onion services.) 8773 Closes ticket 26367. 8774 8775 8776Changes in version 0.2.9.17 - 2018-09-10 8777 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor. 8778 8779 o Minor features (compatibility, backport from 0.3.4.8): 8780 - Tell OpenSSL to maintain backward compatibility with previous 8781 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these 8782 ciphers are disabled by default. Closes ticket 27344. 8783 8784 o Minor features (continuous integration, backport from 0.3.4.7-rc): 8785 - Enable macOS builds in our Travis CI configuration. Closes 8786 ticket 24629. 8787 - Install libcap-dev and libseccomp2-dev so these optional 8788 dependencies get tested on Travis CI. Closes ticket 26560. 8789 - Run asciidoc during Travis CI. Implements ticket 27087. 8790 - Use ccache in our Travis CI configuration. Closes ticket 26952. 8791 8792 o Minor features (geoip): 8793 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2 8794 Country database. Closes ticket 27089. 8795 8796 o Minor bugfixes (compilation, backport from 0.3.4.6-rc): 8797 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc, 8798 tell the compiler not to include the system malloc implementation. 8799 Fixes bug 20424; bugfix on 0.2.0.20-rc. 8800 8801 o Minor bugfixes (compilation, backport from 0.3.4.7-rc): 8802 - Silence a spurious compiler warning on the GetAdaptersAddresses 8803 function pointer cast. This issue is already fixed by 26481 in 8804 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465; 8805 bugfix on 0.2.3.11-alpha. 8806 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not 8807 supported, and always fails. Some compilers warn about the 8808 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix 8809 on 0.2.2.23-alpha. 8810 8811 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc): 8812 - Don't link or search for pthreads when building for Windows, even 8813 if we are using build environment (like mingw) that provides a 8814 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc. 8815 8816 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc): 8817 - Skip a pair of unreliable key generation tests on Windows, until 8818 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and 8819 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively. 8820 8821 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc): 8822 - Pass the module flags to distcheck configure, and log the flags 8823 before running configure. (Backported to 0.2.9 and later as a 8824 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha. 8825 8826 o Minor bugfixes (continuous integration, backport from 0.3.4.8): 8827 - When a Travis build fails, and showing a log fails, keep trying to 8828 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc. 8829 - When we use echo in Travis, don't pass a --flag as the first 8830 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc. 8831 8832 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc): 8833 - When voting for recommended versions, make sure that all of the 8834 versions are well-formed and parsable. Fixes bug 26485; bugfix 8835 on 0.1.1.6-alpha. 8836 8837 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc): 8838 - Fix a bug in out sandboxing rules for the openat() syscall. 8839 Previously, no openat() call would be permitted, which would break 8840 filesystem operations on recent glibc versions. Fixes bug 25440; 8841 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto. 8842 8843 o Minor bugfixes (onion services, backport from 0.3.4.8): 8844 - Silence a spurious compiler warning in 8845 rend_client_send_introduction(). Fixes bug 27463; bugfix 8846 on 0.1.1.2-alpha. 8847 8848 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc): 8849 - Log a protocol warning when single onion services or Tor2web clients 8850 fail to authenticate direct connections to relays. 8851 Fixes bug 26924; bugfix on 0.2.9.1-alpha. 8852 8853 o Minor bugfixes (testing, backport from 0.3.4.6-rc): 8854 - Disable core dumps in test_bt.sh, to avoid failures in "make 8855 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha. 8856 8857 o Minor bugfixes (testing, chutney, backport from 0.3.4.8): 8858 - Before running make test-network-all, delete old logs and test 8859 result files, to avoid spurious failures. Fixes bug 27295; bugfix 8860 on 0.2.7.3-rc. 8861 8862 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc): 8863 - Our "tortls/cert_matches_key" unit test no longer relies on 8864 OpenSSL internals. Previously, it relied on unsupported OpenSSL 8865 behavior in a way that caused it to crash with OpenSSL 1.0.2p. 8866 Fixes bug 27226; bugfix on 0.2.5.1-alpha. 8867 8868 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc): 8869 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug 8870 27185; bugfix on 0.2.2.2-alpha. 8871 8872 8873Changes in version 0.3.2.12 - 2018-09-10 8874 Tor 0.3.2.12 backport numerous fixes from later versions of Tor. 8875 8876 o Minor features (compatibility, backport from 0.3.4.8): 8877 - Tell OpenSSL to maintain backward compatibility with previous 8878 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these 8879 ciphers are disabled by default. Closes ticket 27344. 8880 8881 o Minor features (continuous integration, backport from 0.3.4.7-rc): 8882 - Enable macOS builds in our Travis CI configuration. Closes 8883 ticket 24629. 8884 - Install libcap-dev and libseccomp2-dev so these optional 8885 dependencies get tested on Travis CI. Closes ticket 26560. 8886 - Run asciidoc during Travis CI. Implements ticket 27087. 8887 - Use ccache in our Travis CI configuration. Closes ticket 26952. 8888 8889 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc): 8890 - Use cargo cache in our Travis CI configuration. Closes 8891 ticket 26952. 8892 8893 o Minor features (controller, backport from 0.3.4.6-rc): 8894 - The control port now exposes the list of HTTPTunnelPorts and 8895 ExtOrPorts via GETINFO net/listeners/httptunnel and 8896 net/listeners/extor respectively. Closes ticket 26647. 8897 8898 o Minor features (directory authorities, backport from 0.3.4.7-rc): 8899 - Authorities no longer vote to make the subprotocol version 8900 "LinkAuth=1" a requirement: it is unsupportable with NSS, and 8901 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286. 8902 8903 o Minor features (geoip): 8904 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2 8905 Country database. Closes ticket 27089. 8906 8907 o Minor bugfixes (compilation, backport from 0.3.4.6-rc): 8908 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc, 8909 tell the compiler not to include the system malloc implementation. 8910 Fixes bug 20424; bugfix on 0.2.0.20-rc. 8911 - Don't try to use a pragma to temporarily disable the 8912 -Wunused-const-variable warning if the compiler doesn't support 8913 it. Fixes bug 26785; bugfix on 0.3.2.11. 8914 8915 o Minor bugfixes (compilation, backport from 0.3.4.7-rc): 8916 - Silence a spurious compiler warning on the GetAdaptersAddresses 8917 function pointer cast. This issue is already fixed by 26481 in 8918 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465; 8919 bugfix on 0.2.3.11-alpha. 8920 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not 8921 supported, and always fails. Some compilers warn about the 8922 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix 8923 on 0.2.2.23-alpha. 8924 8925 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc): 8926 - Don't link or search for pthreads when building for Windows, even 8927 if we are using build environment (like mingw) that provides a 8928 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc. 8929 8930 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc): 8931 - Skip a pair of unreliable key generation tests on Windows, until 8932 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and 8933 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively. 8934 8935 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc): 8936 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha. 8937 - Pass the module flags to distcheck configure, and log the flags 8938 before running configure. (Backported to 0.2.9 and later as a 8939 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha. 8940 8941 o Minor bugfixes (continuous integration, backport from 0.3.4.8): 8942 - When a Travis build fails, and showing a log fails, keep trying to 8943 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc. 8944 - When we use echo in Travis, don't pass a --flag as the first 8945 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc. 8946 8947 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc): 8948 - When voting for recommended versions, make sure that all of the 8949 versions are well-formed and parsable. Fixes bug 26485; bugfix 8950 on 0.1.1.6-alpha. 8951 8952 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc): 8953 - Fix a bug in out sandboxing rules for the openat() syscall. 8954 Previously, no openat() call would be permitted, which would break 8955 filesystem operations on recent glibc versions. Fixes bug 25440; 8956 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto. 8957 8958 o Minor bugfixes (logging, backport from 0.3.4.6-rc): 8959 - Improve the log message when connection initiators fail to 8960 authenticate direct connections to relays. Fixes bug 26927; bugfix 8961 on 0.3.0.1-alpha. 8962 8963 o Minor bugfixes (onion services, backport from 0.3.4.7-rc): 8964 - Fix bug that causes services to not ever rotate their descriptors 8965 if they were getting SIGHUPed often. Fixes bug 26932; bugfix 8966 on 0.3.2.1-alpha. 8967 8968 o Minor bugfixes (onion services, backport from 0.3.4.8): 8969 - Silence a spurious compiler warning in 8970 rend_client_send_introduction(). Fixes bug 27463; bugfix 8971 on 0.1.1.2-alpha. 8972 8973 o Minor bugfixes (rust, backport from 0.3.4.7-rc): 8974 - Backport test_rust.sh from master. Fixes bug 26497; bugfix 8975 on 0.3.1.5-alpha. 8976 - Consistently use ../../.. as a fallback for $abs_top_srcdir in 8977 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha. 8978 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or 8979 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha. 8980 8981 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc): 8982 - Log a protocol warning when single onion services or Tor2web clients 8983 fail to authenticate direct connections to relays. 8984 Fixes bug 26924; bugfix on 0.2.9.1-alpha. 8985 8986 o Minor bugfixes (testing, backport from 0.3.4.6-rc): 8987 - Disable core dumps in test_bt.sh, to avoid failures in "make 8988 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha. 8989 8990 o Minor bugfixes (testing, chutney, backport from 0.3.4.8): 8991 - When running make test-network-all, use the mixed+hs-v2 network. 8992 (A previous fix to chutney removed v3 onion services from the 8993 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is 8994 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha. 8995 - Before running make test-network-all, delete old logs and test 8996 result files, to avoid spurious failures. Fixes bug 27295; bugfix 8997 on 0.2.7.3-rc. 8998 8999 o Minor bugfixes (testing, openssl compatibility): 9000 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL 9001 internals. Previously, it relied on unsupported OpenSSL behavior in 9002 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226; 9003 bugfix on 0.2.5.1-alpha. 9004 9005 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc): 9006 - Our "tortls/cert_matches_key" unit test no longer relies on 9007 OpenSSL internals. Previously, it relied on unsupported OpenSSL 9008 behavior in a way that caused it to crash with OpenSSL 1.0.2p. 9009 Fixes bug 27226; bugfix on 0.2.5.1-alpha. 9010 9011 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc): 9012 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug 9013 27185; bugfix on 0.2.2.2-alpha. 9014 9015 9016Changes in version 0.3.3.10 - 2018-09-10 9017 Tor 0.3.3.10 backports numerous fixes from later versions of Tor. 9018 9019 o Minor features (bug workaround, backport from 0.3.4.7-rc): 9020 - Compile correctly on systems that provide the C11 stdatomic.h 9021 header, but where C11 atomic functions don't actually compile. 9022 Closes ticket 26779; workaround for Debian issue 903709. 9023 9024 o Minor features (compatibility, backport from 0.3.4.8): 9025 - Tell OpenSSL to maintain backward compatibility with previous 9026 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these 9027 ciphers are disabled by default. Closes ticket 27344. 9028 9029 o Minor features (continuous integration, backport from 0.3.4.7-rc): 9030 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629. 9031 - Enable macOS builds in our Travis CI configuration. Closes 9032 ticket 24629. 9033 - Install libcap-dev and libseccomp2-dev so these optional 9034 dependencies get tested on Travis CI. Closes ticket 26560. 9035 - Run asciidoc during Travis CI. Implements ticket 27087. 9036 - Use ccache in our Travis CI configuration. Closes ticket 26952. 9037 9038 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc): 9039 - Use cargo cache in our Travis CI configuration. Closes 9040 ticket 26952. 9041 9042 o Minor features (controller, backport from 0.3.4.6-rc): 9043 - The control port now exposes the list of HTTPTunnelPorts and 9044 ExtOrPorts via GETINFO net/listeners/httptunnel and 9045 net/listeners/extor respectively. Closes ticket 26647. 9046 9047 o Minor features (directory authorities, backport from 0.3.4.7-rc): 9048 - Authorities no longer vote to make the subprotocol version 9049 "LinkAuth=1" a requirement: it is unsupportable with NSS, and 9050 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286. 9051 9052 o Minor features (geoip): 9053 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2 9054 Country database. Closes ticket 27089. 9055 9056 o Minor bugfixes (compilation, backport from 0.3.4.6-rc): 9057 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc, 9058 tell the compiler not to include the system malloc implementation. 9059 Fixes bug 20424; bugfix on 0.2.0.20-rc. 9060 - Don't try to use a pragma to temporarily disable the 9061 -Wunused-const-variable warning if the compiler doesn't support 9062 it. Fixes bug 26785; bugfix on 0.3.2.11. 9063 9064 o Minor bugfixes (compilation, backport from 0.3.4.7-rc): 9065 - Silence a spurious compiler warning on the GetAdaptersAddresses 9066 function pointer cast. This issue is already fixed by 26481 in 9067 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465; 9068 bugfix on 0.2.3.11-alpha. 9069 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not 9070 supported, and always fails. Some compilers warn about the 9071 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix 9072 on 0.2.2.23-alpha. 9073 9074 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc): 9075 - Don't link or search for pthreads when building for Windows, even 9076 if we are using build environment (like mingw) that provides a 9077 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc. 9078 9079 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc): 9080 - Skip a pair of unreliable key generation tests on Windows, until 9081 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and 9082 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively. 9083 9084 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc): 9085 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha. 9086 - Pass the module flags to distcheck configure, and log the flags 9087 before running configure. (Backported to 0.2.9 and later as a 9088 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha. 9089 9090 o Minor bugfixes (continuous integration, backport from 0.3.4.8): 9091 - When a Travis build fails, and showing a log fails, keep trying to 9092 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc. 9093 - When we use echo in Travis, don't pass a --flag as the first 9094 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc. 9095 9096 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc): 9097 - When voting for recommended versions, make sure that all of the 9098 versions are well-formed and parsable. Fixes bug 26485; bugfix 9099 on 0.1.1.6-alpha. 9100 9101 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc): 9102 - Always call tor_free_all() when leaving tor_run_main(). When we 9103 did not, restarting tor in-process would cause an assertion 9104 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha. 9105 9106 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc): 9107 - Fix a bug in our sandboxing rules for the openat() syscall. 9108 Previously, no openat() call would be permitted, which would break 9109 filesystem operations on recent glibc versions. Fixes bug 25440; 9110 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto. 9111 9112 o Minor bugfixes (logging, backport from 0.3.4.6-rc): 9113 - Improve the log message when connection initiators fail to 9114 authenticate direct connections to relays. Fixes bug 26927; bugfix 9115 on 0.3.0.1-alpha. 9116 9117 o Minor bugfixes (onion services, backport from 0.3.4.7-rc): 9118 - Fix bug that causes services to not ever rotate their descriptors 9119 if they were getting SIGHUPed often. Fixes bug 26932; bugfix 9120 on 0.3.2.1-alpha. 9121 9122 o Minor bugfixes (onion services, backport from 0.3.4.8): 9123 - Silence a spurious compiler warning in 9124 rend_client_send_introduction(). Fixes bug 27463; bugfix 9125 on 0.1.1.2-alpha. 9126 9127 o Minor bugfixes (portability, backport from 0.3.4.6-rc): 9128 - Work around two different bugs in the OS X 10.10 and later SDKs 9129 that would prevent us from successfully targeting earlier versions 9130 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha. 9131 9132 o Minor bugfixes (portability, backport from 0.3.4.7-rc): 9133 - Fix compilation of the unit tests on GNU/Hurd, which does not 9134 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch 9135 from "paulusASol". 9136 9137 o Minor bugfixes (rust, backport from 0.3.4.7-rc): 9138 - Backport test_rust.sh from master. Fixes bug 26497; bugfix 9139 on 0.3.1.5-alpha. 9140 - Consistently use ../../.. as a fallback for $abs_top_srcdir in 9141 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha. 9142 - Protover parsing was accepting the presence of whitespace in 9143 version strings, which the C implementation would choke on, e.g. 9144 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc. 9145 - Protover parsing was ignoring a 2nd hyphen and everything after 9146 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix 9147 on 0.3.3.1-alpha. 9148 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or 9149 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha. 9150 - cd to ${abs_top_builddir}/src/rust before running cargo in 9151 src/test/test_rust.sh. This makes the working directory consistent 9152 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha. 9153 9154 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc): 9155 - Log a protocol warning when single onion services or Tor2web clients 9156 fail to authenticate direct connections to relays. 9157 Fixes bug 26924; bugfix on 0.2.9.1-alpha. 9158 9159 o Minor bugfixes (testing, backport from 0.3.4.6-rc): 9160 - Disable core dumps in test_bt.sh, to avoid failures in "make 9161 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha. 9162 9163 o Minor bugfixes (testing, chutney, backport from 0.3.4.8): 9164 - When running make test-network-all, use the mixed+hs-v2 network. 9165 (A previous fix to chutney removed v3 onion services from the 9166 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is 9167 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha. 9168 - Before running make test-network-all, delete old logs and test 9169 result files, to avoid spurious failures. Fixes bug 27295; bugfix 9170 on 0.2.7.3-rc. 9171 9172 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc): 9173 - Our "tortls/cert_matches_key" unit test no longer relies on 9174 OpenSSL internals. Previously, it relied on unsupported OpenSSL 9175 behavior in a way that caused it to crash with OpenSSL 1.0.2p. 9176 Fixes bug 27226; bugfix on 0.2.5.1-alpha. 9177 9178 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc): 9179 - Stop sending ed25519 link specifiers in v3 onion service introduce 9180 cells and descriptors, when the rendezvous or introduction point 9181 doesn't support ed25519 link authentication. Fixes bug 26627; 9182 bugfix on 0.3.2.4-alpha. 9183 9184 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc): 9185 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug 9186 27185; bugfix on 0.2.2.2-alpha. 9187 9188 9189Changes in version 0.3.4.8 - 2018-09-10 9190 Tor 0.3.4.8 is the first stable release in its series; it includes 9191 compilation and portability fixes. 9192 9193 The Tor 0.3.4 series includes improvements for running Tor in 9194 low-power and embedded environments, which should help performance in 9195 general. We've begun work on better modularity, and included preliminary 9196 changes on the directory authority side to accommodate a new bandwidth 9197 measurement system. We've also integrated more continuous-integration 9198 systems into our development process, and made corresponding changes to 9199 Tor's testing infrastructure. Finally, we've continued to refine 9200 our anti-denial-of-service code. 9201 9202 Below are the changes since 0.3.4.7-rc. For a complete list of changes 9203 since 0.3.3.9, see the ReleaseNotes file. 9204 9205 o Minor features (compatibility): 9206 - Tell OpenSSL to maintain backward compatibility with previous 9207 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these 9208 ciphers are disabled by default. Closes ticket 27344. 9209 9210 o Minor features (continuous integration): 9211 - Log the compiler path and version during Appveyor builds. 9212 Implements ticket 27449. 9213 - Show config.log and test-suite.log after failed Appveyor builds. 9214 Also upload the zipped full logs as a build artifact. Implements 9215 ticket 27430. 9216 9217 o Minor bugfixes (compilation): 9218 - Silence a spurious compiler warning on the GetAdaptersAddresses 9219 function pointer cast. This issue is already fixed by 26481 in 9220 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465; 9221 bugfix on 0.2.3.11-alpha. 9222 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not 9223 supported, and always fails. Some compilers warn about the 9224 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix 9225 on 0.2.2.23-alpha. 9226 9227 o Minor bugfixes (continuous integration): 9228 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of 9229 August 29 2018, Appveyor images come with gcc 8.2.0 by default. 9230 Executables compiled for 64-bit Windows with this version of gcc 9231 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug 9232 27460; bugfix on 0.3.4.1-alpha. 9233 - When a Travis build fails, and showing a log fails, keep trying to 9234 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc. 9235 - When we use echo in Travis, don't pass a --flag as the first 9236 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc. 9237 9238 o Minor bugfixes (onion services): 9239 - Silence a spurious compiler warning in 9240 rend_client_send_introduction(). Fixes bug 27463; bugfix 9241 on 0.1.1.2-alpha. 9242 9243 o Minor bugfixes (testing, chutney): 9244 - When running make test-network-all, use the mixed+hs-v2 network. 9245 (A previous fix to chutney removed v3 onion services from the 9246 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is 9247 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha. 9248 - Before running make test-network-all, delete old logs and test 9249 result files, to avoid spurious failures. Fixes bug 27295; bugfix 9250 on 0.2.7.3-rc. 9251 9252Changes in version 0.3.4.7-rc - 2018-08-24 9253 Tor 0.3.4.7-rc fixes several small compilation, portability, and 9254 correctness issues in previous versions of Tor. This version is a 9255 release candidate: if no serious bugs are found, we expect that the 9256 stable 0.3.4 release will be (almost) the same as this release. 9257 9258 o Minor features (bug workaround): 9259 - Compile correctly on systems that provide the C11 stdatomic.h 9260 header, but where C11 atomic functions don't actually compile. 9261 Closes ticket 26779; workaround for Debian issue 903709. 9262 9263 o Minor features (continuous integration): 9264 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629. 9265 - Enable macOS builds in our Travis CI configuration. Closes 9266 ticket 24629. 9267 - Install libcap-dev and libseccomp2-dev so these optional 9268 dependencies get tested on Travis CI. Closes ticket 26560. 9269 - Only post Appveyor IRC notifications when the build fails. 9270 Implements ticket 27275. 9271 - Run asciidoc during Travis CI. Implements ticket 27087. 9272 - Use ccache in our Travis CI configuration. Closes ticket 26952. 9273 9274 o Minor features (continuous integration, rust): 9275 - Use cargo cache in our Travis CI configuration. Closes 9276 ticket 26952. 9277 9278 o Minor features (directory authorities): 9279 - Authorities no longer vote to make the subprotocol version 9280 "LinkAuth=1" a requirement: it is unsupportable with NSS, and 9281 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286. 9282 9283 o Minor features (geoip): 9284 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2 9285 Country database. Closes ticket 27089. 9286 9287 o Minor bugfixes (compilation, windows): 9288 - Don't link or search for pthreads when building for Windows, even 9289 if we are using build environment (like mingw) that provides a 9290 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc. 9291 9292 o Minor bugfixes (continuous integration): 9293 - Improve Appveyor CI IRC logging. Generate correct branches and 9294 URLs for pull requests and tags. Use unambiguous short commits. 9295 Fixes bug 26979; bugfix on master. 9296 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha. 9297 - Pass the module flags to distcheck configure, and log the flags 9298 before running configure. (Backported to 0.2.9 and later as a 9299 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha. 9300 9301 o Minor bugfixes (in-process restart): 9302 - Always call tor_free_all() when leaving tor_run_main(). When we 9303 did not, restarting tor in-process would cause an assertion 9304 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha. 9305 9306 o Minor bugfixes (linux seccomp2 sandbox): 9307 - Fix a bug in out sandboxing rules for the openat() syscall. 9308 Previously, no openat() call would be permitted, which would break 9309 filesystem operations on recent glibc versions. Fixes bug 25440; 9310 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto. 9311 9312 o Minor bugfixes (onion services): 9313 - Fix bug that causes services to not ever rotate their descriptors 9314 if they were getting SIGHUPed often. Fixes bug 26932; bugfix 9315 on 0.3.2.1-alpha. 9316 9317 o Minor bugfixes (portability): 9318 - Fix compilation of the unit tests on GNU/Hurd, which does not 9319 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch 9320 from "paulusASol". 9321 9322 o Minor bugfixes (rust): 9323 - Backport test_rust.sh from master. Fixes bug 26497; bugfix 9324 on 0.3.1.5-alpha. 9325 - Consistently use ../../.. as a fallback for $abs_top_srcdir in 9326 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha. 9327 - Protover parsing was accepting the presence of whitespace in 9328 version strings, which the C implementation would choke on, e.g. 9329 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc. 9330 - Protover parsing was ignoring a 2nd hyphen and everything after 9331 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix 9332 on 0.3.3.1-alpha. 9333 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or 9334 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha. 9335 - cd to ${abs_top_builddir}/src/rust before running cargo in 9336 src/test/test_rust.sh. This makes the working directory consistent 9337 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha. 9338 9339 o Minor bugfixes (testing, bootstrap): 9340 - When calculating bootstrap progress, check exit policies and the 9341 exit flag. Previously, Tor would only check the exit flag, which 9342 caused race conditions in small and fast networks like chutney. 9343 Fixes bug 27236; bugfix on 0.2.6.3-alpha. 9344 9345 o Minor bugfixes (testing, openssl compatibility): 9346 - Our "tortls/cert_matches_key" unit test no longer relies on 9347 OpenSSL internals. Previously, it relied on unsupported OpenSSL 9348 behavior in a way that caused it to crash with OpenSSL 1.0.2p. 9349 Fixes bug 27226; bugfix on 0.2.5.1-alpha. 9350 9351 o Minor bugfixes (Windows, compilation): 9352 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug 9353 27185; bugfix on 0.2.2.2-alpha. 9354 9355 9356Changes in version 0.3.4.6-rc - 2018-08-06 9357 Tor 0.3.4.6-rc fixes several small compilation, portability, and 9358 correctness issues in previous versions of Tor. This version is a 9359 release candidate: if no serious bugs are found, we expect that the 9360 stable 0.3.4 release will be (almost) the same as this release. 9361 9362 o Major bugfixes (event scheduler): 9363 - When we enable a periodic event, schedule it in the event loop 9364 rather than running it immediately. Previously, we would re-run 9365 periodic events immediately in the middle of (for example) 9366 changing our options, with unpredictable effects. Fixes bug 27003; 9367 bugfix on 0.3.4.1-alpha. 9368 9369 o Minor features (compilation): 9370 - When building Tor, prefer to use Python 3 over Python 2, and more 9371 recent (contemplated) versions over older ones. Closes 9372 ticket 26372. 9373 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc, 9374 tell the compiler not to include the system malloc implementation. 9375 Fixes bug 20424; bugfix on 0.2.0.20-rc. 9376 - Don't try to use a pragma to temporarily disable the 9377 -Wunused-const-variable warning if the compiler doesn't support 9378 it. Fixes bug 26785; bugfix on 0.3.2.11. 9379 9380 o Minor bugfixes (continuous integration): 9381 - Skip a pair of unreliable key generation tests on Windows, until 9382 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and 9383 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively. 9384 9385 o Minor features (controller): 9386 - The control port now exposes the list of HTTPTunnelPorts and 9387 ExtOrPorts via GETINFO net/listeners/httptunnel and 9388 net/listeners/extor respectively. Closes ticket 26647. 9389 9390 o Minor bugfixes (directory authority): 9391 - When voting for recommended versions, make sure that all of the 9392 versions are well-formed and parsable. Fixes bug 26485; bugfix 9393 on 0.1.1.6-alpha. 9394 9395 o Minor features (geoip): 9396 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2 9397 Country database. Closes ticket 26674. 9398 9399 o Minor features (Rust, portability): 9400 - Rust cross-compilation is now supported. Closes ticket 25895. 9401 9402 o Minor bugfixes (compilation): 9403 - Update build system so that tor builds again with --disable-unittests 9404 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha. 9405 - Fix a compilation warning on some versions of GCC when building 9406 code that calls routerinfo_get_my_routerinfo() twice, assuming 9407 that the second call will succeed if the first one did. Fixes bug 9408 26269; bugfix on 0.2.8.2-alpha. 9409 9410 o Minor bugfixes (controller): 9411 - Report the port correctly when a port is configured to bind to 9412 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha. 9413 - Parse the "HSADDRESS=" parameter in HSPOST commands properly. 9414 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix 9415 on 0.3.3.1-alpha. Patch by "akwizgran". 9416 9417 o Minor bugfixes (correctness, flow control): 9418 - Upon receiving a stream-level SENDME cell, verify that our window 9419 has not grown too large. Fixes bug 26214; bugfix on svn 9420 r54 (pre-0.0.1). 9421 9422 o Minor bugfixes (memory, correctness): 9423 - Fix a number of small memory leaks identified by coverity. Fixes 9424 bug 26467; bugfix on numerous Tor versions. 9425 9426 o Minor bugfixes (logging): 9427 - Improve the log message when connection initiators fail to 9428 authenticate direct connections to relays. Fixes bug 26927; bugfix 9429 on 0.3.0.1-alpha. 9430 9431 o Minor bugfixes (portability): 9432 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug 9433 26994; bugfix on 0.3.4.1-alpha. 9434 - Work around two different bugs in the OS X 10.10 and later SDKs 9435 that would prevent us from successfully targeting earlier versions 9436 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha. 9437 9438 o Minor bugfixes (single onion services, Tor2web): 9439 - Log a protocol warning when single onion services or Tor2web 9440 clients fail to authenticate direct connections to relays. Fixes 9441 bug 26924; bugfix on 0.2.9.1-alpha. 9442 9443 o Minor bugfixes (testing): 9444 - Disable core dumps in test_bt.sh, to avoid failures in "make 9445 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha. 9446 9447 o Minor bugfixes (testing, compatibility): 9448 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure 9449 only to pass strings (rather than "bytes" objects) to the Python 9450 subprocess module. Python 3 on Windows seems to require this. 9451 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and 9452 0.3.1.1-alpha (for hs_ntor_ref.py). 9453 9454 o Minor bugfixes (v3 onion services): 9455 - Stop sending ed25519 link specifiers in v3 onion service introduce 9456 cells and descriptors, when the rendezvous or introduction point 9457 doesn't support ed25519 link authentication. Fixes bug 26627; 9458 bugfix on 0.3.2.4-alpha. 9459 9460 9461Changes in version 0.3.4.5-rc - 2018-07-13 9462 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running 9463 bridge relays should upgrade. 9464 9465 o Directory authority changes: 9466 - The "Bifroest" bridge authority has been retired; the new bridge 9467 authority is "Serge", and it is operated by George from the 9468 TorBSD project. Closes ticket 26771. 9469 9470 9471Changes in version 0.3.3.9 - 2018-07-13 9472 Tor 0.3.3.9 moves to a new bridge authority, meaning people running 9473 bridge relays should upgrade. 9474 9475 o Directory authority changes: 9476 - The "Bifroest" bridge authority has been retired; the new bridge 9477 authority is "Serge", and it is operated by George from the 9478 TorBSD project. Closes ticket 26771. 9479 9480 9481Changes in version 0.3.2.11 - 2018-07-13 9482 Tor 0.3.2.11 moves to a new bridge authority, meaning people running 9483 bridge relays should upgrade. We also take this opportunity to backport 9484 other minor fixes. 9485 9486 o Directory authority changes: 9487 - The "Bifroest" bridge authority has been retired; the new bridge 9488 authority is "Serge", and it is operated by George from the 9489 TorBSD project. Closes ticket 26771. 9490 9491 o Directory authority changes (backport from 0.3.3.7): 9492 - Add an IPv6 address for the "dannenberg" directory authority. 9493 Closes ticket 26343. 9494 9495 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha): 9496 - When directory authorities read a zero-byte bandwidth file, they 9497 would previously log a warning with the contents of an 9498 uninitialised buffer. They now log a warning about the empty file 9499 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha. 9500 9501 o Major bugfixes (onion service, backport from 0.3.4.1-alpha): 9502 - Correctly detect when onion services get disabled after HUP. Fixes 9503 bug 25761; bugfix on 0.3.2.1. 9504 9505 o Minor features (sandbox, backport from 0.3.3.4-alpha): 9506 - Explicitly permit the poll() system call when the Linux 9507 seccomp2-based sandbox is enabled: apparently, some versions of 9508 libc use poll() when calling getpwnam(). Closes ticket 25313. 9509 9510 o Minor feature (continuous integration, backport from 0.3.3.5-rc): 9511 - Update the Travis CI configuration to use the stable Rust channel, 9512 now that we have decided to require that. Closes ticket 25714. 9513 9514 o Minor features (continuous integration, backport from 0.3.4.1-alpha): 9515 - Our .travis.yml configuration now includes support for testing the 9516 results of "make distcheck". (It's not uncommon for "make check" 9517 to pass but "make distcheck" to fail.) Closes ticket 25814. 9518 - Our Travis CI configuration now integrates with the Coveralls 9519 coverage analysis tool. Closes ticket 25818. 9520 9521 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha): 9522 - Add several checks to detect whether Tor relays are uploading 9523 their descriptors without specifying why they regenerated them. 9524 Diagnostic for ticket 25686. 9525 9526 o Minor features (compilation, backport from 0.3.4.4-rc): 9527 - When building Tor, prefer to use Python 3 over Python 2, and more 9528 recent (contemplated) versions over older ones. Closes 9529 ticket 26372. 9530 9531 o Minor features (geoip): 9532 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2 9533 Country database. Closes ticket 26674. 9534 9535 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha): 9536 - Upon receiving a malformed connected cell, stop processing the 9537 cell immediately. Previously we would mark the connection for 9538 close, but continue processing the cell as if the connection were 9539 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha. 9540 9541 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha): 9542 - Allow the nanosleep() system call, which glibc uses to implement 9543 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha. 9544 9545 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc): 9546 - When running the hs_ntor_ref.py test, make sure only to pass 9547 strings (rather than "bytes" objects) to the Python subprocess 9548 module. Python 3 on Windows seems to require this. Fixes bug 9549 26535; bugfix on 0.3.1.1-alpha. 9550 - When running the ntor_ref.py test, make sure only to pass strings 9551 (rather than "bytes" objects) to the Python subprocess module. 9552 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix 9553 on 0.2.5.5-alpha. 9554 9555 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha): 9556 - Work around a change in OpenSSL 1.1.1 where return values that 9557 would previously indicate "no password" now indicate an empty 9558 password. Without this workaround, Tor instances running with 9559 OpenSSL 1.1.1 would accept descriptors that other Tor instances 9560 would reject. Fixes bug 26116; bugfix on 0.2.5.16. 9561 9562 o Minor bugfixes (documentation, backport from 0.3.3.5-rc): 9563 - Document that the PerConnBW{Rate,Burst} options will fall back to 9564 their corresponding consensus parameters only if those parameters 9565 are set. Previously we had claimed that these values would always 9566 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha. 9567 9568 o Minor bugfixes (compilation, backport from 0.3.4.4-rc): 9569 - Fix a compilation warning on some versions of GCC when building 9570 code that calls routerinfo_get_my_routerinfo() twice, assuming 9571 that the second call will succeed if the first one did. Fixes bug 9572 26269; bugfix on 0.2.8.2-alpha. 9573 9574 o Minor bugfixes (client, backport from 0.3.4.1-alpha): 9575 - Don't consider Tor running as a client if the ControlPort is open, 9576 but no actual client ports are open. Fixes bug 26062; bugfix 9577 on 0.2.9.4-alpha. 9578 9579 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha): 9580 - Prevent a possible out-of-bounds smartlist read in 9581 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha. 9582 9583 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha): 9584 - Fix a very unlikely (impossible, we believe) null pointer 9585 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by 9586 Coverity; this is CID 1430932. 9587 9588 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha): 9589 - Fix a memory leak when a v3 onion service is configured and gets a 9590 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha. 9591 - When parsing the descriptor signature, look for the token plus an 9592 extra white-space at the end. This is more correct but also will 9593 allow us to support new fields that might start with "signature". 9594 Fixes bug 26069; bugfix on 0.3.0.1-alpha. 9595 9596 o Minor bugfixes (relay, backport from 0.3.4.3-alpha): 9597 - Relays now correctly block attempts to re-extend to the previous 9598 relay by Ed25519 identity. Previously they would warn in this 9599 case, but not actually reject the attempt. Fixes bug 26158; bugfix 9600 on 0.3.0.1-alpha. 9601 9602 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha): 9603 - Avoid a crash when running with DirPort set but ORPort turned off. 9604 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha. 9605 9606 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha): 9607 - Silence unused-const-variable warnings in zstd.h with some GCC 9608 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha. 9609 9610 o Minor bugfixes (testing, backport from 0.3.3.4-alpha): 9611 - Avoid intermittent test failures due to a test that had relied on 9612 onion service introduction point creation finishing within 5 9613 seconds of real clock time. Fixes bug 25450; bugfix 9614 on 0.3.1.3-alpha. 9615 9616 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha): 9617 - Fix a C99 compliance issue in our configuration script that caused 9618 compilation issues when compiling Tor with certain versions of 9619 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha. 9620 9621 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc): 9622 - Fix a number of small memory leaks identified by coverity. Fixes 9623 bug 26467; bugfix on numerous Tor versions. 9624 9625 o Code simplification and refactoring (backport from 0.3.3.5-rc): 9626 - Move the list of default directory authorities to its own file. 9627 Closes ticket 24854. Patch by "beastr0". 9628 9629 9630Changes in version 0.2.9.16 - 2018-07-13 9631 Tor 0.2.9.16 moves to a new bridge authority, meaning people running 9632 bridge relays should upgrade. We also take this opportunity to backport 9633 other minor fixes. 9634 9635 o Directory authority changes: 9636 - The "Bifroest" bridge authority has been retired; the new bridge 9637 authority is "Serge", and it is operated by George from the 9638 TorBSD project. Closes ticket 26771. 9639 9640 o Directory authority changes (backport from 0.3.3.7): 9641 - Add an IPv6 address for the "dannenberg" directory authority. 9642 Closes ticket 26343. 9643 9644 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha): 9645 - When directory authorities read a zero-byte bandwidth file, they 9646 would previously log a warning with the contents of an 9647 uninitialised buffer. They now log a warning about the empty file 9648 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha. 9649 9650 o Minor features (sandbox, backport from 0.3.3.4-alpha): 9651 - Explicitly permit the poll() system call when the Linux 9652 seccomp2-based sandbox is enabled: apparently, some versions of 9653 libc use poll() when calling getpwnam(). Closes ticket 25313. 9654 9655 o Minor features (continuous integration, backport from 0.3.4.1-alpha): 9656 - Our .travis.yml configuration now includes support for testing the 9657 results of "make distcheck". (It's not uncommon for "make check" 9658 to pass but "make distcheck" to fail.) Closes ticket 25814. 9659 - Our Travis CI configuration now integrates with the Coveralls 9660 coverage analysis tool. Closes ticket 25818. 9661 9662 o Minor features (compilation, backport from 0.3.4.4-rc): 9663 - When building Tor, prefer to use Python 3 over Python 2, and more 9664 recent (contemplated) versions over older ones. Closes 9665 ticket 26372. 9666 9667 o Minor features (geoip): 9668 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2 9669 Country database. Closes ticket 26674. 9670 9671 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha): 9672 - Upon receiving a malformed connected cell, stop processing the 9673 cell immediately. Previously we would mark the connection for 9674 close, but continue processing the cell as if the connection were 9675 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha. 9676 9677 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha): 9678 - Allow the nanosleep() system call, which glibc uses to implement 9679 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha. 9680 9681 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc): 9682 - When running the ntor_ref.py test, make sure only to pass strings 9683 (rather than "bytes" objects) to the Python subprocess module. 9684 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix 9685 on 0.2.5.5-alpha. 9686 9687 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha): 9688 - Work around a change in OpenSSL 1.1.1 where return values that 9689 would previously indicate "no password" now indicate an empty 9690 password. Without this workaround, Tor instances running with 9691 OpenSSL 1.1.1 would accept descriptors that other Tor instances 9692 would reject. Fixes bug 26116; bugfix on 0.2.5.16. 9693 9694 o Minor bugfixes (compilation, backport from 0.3.4.4-rc): 9695 - Fix a compilation warning on some versions of GCC when building 9696 code that calls routerinfo_get_my_routerinfo() twice, assuming 9697 that the second call will succeed if the first one did. Fixes bug 9698 26269; bugfix on 0.2.8.2-alpha. 9699 9700 o Minor bugfixes (client, backport from 0.3.4.1-alpha): 9701 - Don't consider Tor running as a client if the ControlPort is open, 9702 but no actual client ports are open. Fixes bug 26062; bugfix 9703 on 0.2.9.4-alpha. 9704 9705 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha): 9706 - Prevent a possible out-of-bounds smartlist read in 9707 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha. 9708 9709 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha): 9710 - Fix a very unlikely (impossible, we believe) null pointer 9711 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by 9712 Coverity; this is CID 1430932. 9713 9714 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc): 9715 - Fix a number of small memory leaks identified by coverity. Fixes 9716 bug 26467; bugfix on numerous Tor versions. 9717 9718 o Code simplification and refactoring (backport from 0.3.3.5-rc): 9719 - Move the list of default directory authorities to its own file. 9720 Closes ticket 24854. Patch by "beastr0". 9721 9722 9723Changes in version 0.3.4.4-rc - 2018-07-09 9724 Tor 0.3.4.4-rc fixes several small compilation, portability, and 9725 correctness issues in previous versions of Tor. This version is a 9726 release candidate: if no serious bugs are found, we expect that the 9727 stable 0.3.4 release will be (almost) the same as this release. 9728 9729 o Minor features (compilation): 9730 - When building Tor, prefer to use Python 3 over Python 2, and more 9731 recent (contemplated) versions over older ones. Closes 9732 ticket 26372. 9733 9734 o Minor features (geoip): 9735 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2 9736 Country database. Closes ticket 26674. 9737 9738 o Minor features (Rust, portability): 9739 - Rust cross-compilation is now supported. Closes ticket 25895. 9740 9741 o Minor bugfixes (compilation): 9742 - Fix a compilation warning on some versions of GCC when building 9743 code that calls routerinfo_get_my_routerinfo() twice, assuming 9744 that the second call will succeed if the first one did. Fixes bug 9745 26269; bugfix on 0.2.8.2-alpha. 9746 9747 o Minor bugfixes (control port): 9748 - Report the port correctly when a port is configured to bind to 9749 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha. 9750 - Handle the HSADDRESS= argument to the HSPOST command properly. 9751 (Previously, this argument was misparsed and thus ignored.) Fixes 9752 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran". 9753 9754 o Minor bugfixes (correctness, flow control): 9755 - Upon receiving a stream-level SENDME cell, verify that our window 9756 has not grown too large. Fixes bug 26214; bugfix on svn 9757 r54 (pre-0.0.1). 9758 9759 o Minor bugfixes (memory, correctness): 9760 - Fix a number of small memory leaks identified by coverity. Fixes 9761 bug 26467; bugfix on numerous Tor versions. 9762 9763 o Minor bugfixes (testing, compatibility): 9764 - When running the hs_ntor_ref.py test, make sure only to pass 9765 strings (rather than "bytes" objects) to the Python subprocess 9766 module. Python 3 on Windows seems to require this. Fixes bug 9767 26535; bugfix on 0.3.1.1-alpha. 9768 - When running the ntor_ref.py test, make sure only to pass strings 9769 (rather than "bytes" objects) to the Python subprocess module. 9770 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix 9771 on 0.2.5.5-alpha. 9772 9773 9774Changes in version 0.3.3.8 - 2018-07-09 9775 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including 9776 fixes for a memory leak affecting directory authorities. 9777 9778 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha): 9779 - Stop leaking memory on directory authorities when planning to 9780 vote. This bug was crashing authorities by exhausting their 9781 memory. Fixes bug 26435; bugfix on 0.3.3.6. 9782 9783 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha): 9784 - Make sure that failing tests in Rust will actually cause the build 9785 to fail: previously, they were ignored. Fixes bug 26258; bugfix 9786 on 0.3.3.4-alpha. 9787 9788 o Minor features (compilation, backport from 0.3.4.4-rc): 9789 - When building Tor, prefer to use Python 3 over Python 2, and more 9790 recent (contemplated) versions over older ones. Closes 9791 ticket 26372. 9792 9793 o Minor features (geoip): 9794 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2 9795 Country database. Closes ticket 26674. 9796 9797 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha): 9798 - Add several checks to detect whether Tor relays are uploading 9799 their descriptors without specifying why they regenerated them. 9800 Diagnostic for ticket 25686. 9801 9802 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha): 9803 - Don't count path selection failures as circuit build failures. 9804 This change should eliminate cases where Tor blames its guard or 9805 the network for situations like insufficient microdescriptors 9806 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix 9807 on 0.3.3.1-alpha. 9808 9809 o Minor bugfixes (compilation, backport from 0.3.4.4-rc): 9810 - Fix a compilation warning on some versions of GCC when building 9811 code that calls routerinfo_get_my_routerinfo() twice, assuming 9812 that the second call will succeed if the first one did. Fixes bug 9813 26269; bugfix on 0.2.8.2-alpha. 9814 9815 o Minor bugfixes (control port, backport from 0.3.4.4-rc): 9816 - Handle the HSADDRESS= argument to the HSPOST command properly. 9817 (Previously, this argument was misparsed and thus ignored.) Fixes 9818 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran". 9819 9820 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc): 9821 - Fix a number of small memory leaks identified by coverity. Fixes 9822 bug 26467; bugfix on numerous Tor versions. 9823 9824 o Minor bugfixes (relay, backport from 0.3.4.3-alpha): 9825 - Relays now correctly block attempts to re-extend to the previous 9826 relay by Ed25519 identity. Previously they would warn in this 9827 case, but not actually reject the attempt. Fixes bug 26158; bugfix 9828 on 0.3.0.1-alpha. 9829 9830 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha): 9831 - When shutting down, Tor now clears all the flags in the control.c 9832 module. This should prevent a bug where authentication cookies are 9833 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha. 9834 9835 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc): 9836 - When running the hs_ntor_ref.py test, make sure only to pass 9837 strings (rather than "bytes" objects) to the Python subprocess 9838 module. Python 3 on Windows seems to require this. Fixes bug 9839 26535; bugfix on 0.3.1.1-alpha. 9840 - When running the ntor_ref.py test, make sure only to pass strings 9841 (rather than "bytes" objects) to the Python subprocess module. 9842 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix 9843 on 0.2.5.5-alpha. 9844 9845 9846Changes in version 0.3.4.3-alpha - 2018-06-26 9847 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including 9848 one that was causing stability issues on directory authorities. 9849 9850 o Major bugfixes (directory authority): 9851 - Stop leaking memory on directory authorities when planning to 9852 vote. This bug was crashing authorities by exhausting their 9853 memory. Fixes bug 26435; bugfix on 0.3.3.6. 9854 9855 o Major bugfixes (rust, testing): 9856 - Make sure that failing tests in Rust will actually cause the build 9857 to fail: previously, they were ignored. Fixes bug 26258; bugfix 9858 on 0.3.3.4-alpha. 9859 9860 o Minor feature (directory authorities): 9861 - Stop warning about incomplete bw lines before the first complete 9862 bw line has been found, so that additional header lines can be 9863 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha 9864 9865 o Minor features (relay, diagnostic): 9866 - Add several checks to detect whether Tor relays are uploading 9867 their descriptors without specifying why they regenerated them. 9868 Diagnostic for ticket 25686. 9869 9870 o Minor features (unit tests): 9871 - Test complete bandwidth measurements files, and test that 9872 incomplete bandwidth lines only give warnings when the end of the 9873 header has not been detected. Fixes bug 25947; bugfix 9874 on 0.2.2.1-alpha 9875 9876 o Minor bugfixes (compilation): 9877 - Refrain from compiling unit testing related object files when 9878 --disable-unittests is set to configure script. Fixes bug 24891; 9879 bugfix on 0.2.5.1-alpha. 9880 - When linking the libtor_testing.a library, only include the 9881 dirauth object files once. Previously, they were getting added 9882 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha. 9883 - The --enable-fatal-warnings flag now affects Rust code as well. 9884 Closes ticket 26245. 9885 9886 o Minor bugfixes (onion services): 9887 - Recompute some consensus information after detecting a clock jump, 9888 or after transitioning from a non-live consensus to a live 9889 consensus. We do this to avoid having an outdated state, and 9890 miscalculating the index for next-generation onion services. Fixes 9891 bug 24977; bugfix on 0.3.2.1-alpha. 9892 9893 o Minor bugfixes (relay): 9894 - Relays now correctly block attempts to re-extend to the previous 9895 relay by Ed25519 identity. Previously they would warn in this 9896 case, but not actually reject the attempt. Fixes bug 26158; bugfix 9897 on 0.3.0.1-alpha. 9898 9899 o Minor bugfixes (testing): 9900 - Fix compilation of the doctests in the Rust crypto crate. Fixes 9901 bug 26415; bugfix on 0.3.4.1-alpha. 9902 - Instead of trying to read the geoip configuration files from 9903 within the unit tests, instead create our own ersatz files with 9904 just enough geoip data in the format we expect. Trying to read 9905 from the source directory created problems on Windows with mingw, 9906 where the build system's paths are not the same as the platform's 9907 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha. 9908 - Refrain from trying to get an item from an empty smartlist in 9909 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests 9910 to catch improper smartlist usage. Furthermore, enable 9911 DEBUG_SMARTLIST globally when build is configured with fragile 9912 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha. 9913 9914 9915Changes in version 0.3.3.7 - 2018-06-12 9916 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including 9917 fixes for bugs affecting compatibility and stability. 9918 9919 o Directory authority changes: 9920 - Add an IPv6 address for the "dannenberg" directory authority. 9921 Closes ticket 26343. 9922 9923 o Minor features (geoip): 9924 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2 9925 Country database. Closes ticket 26351. 9926 9927 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha): 9928 - Work around a change in OpenSSL 1.1.1 where return values that 9929 would previously indicate "no password" now indicate an empty 9930 password. Without this workaround, Tor instances running with 9931 OpenSSL 1.1.1 would accept descriptors that other Tor instances 9932 would reject. Fixes bug 26116; bugfix on 0.2.5.16. 9933 9934 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha): 9935 - Silence unused-const-variable warnings in zstd.h with some GCC 9936 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha. 9937 9938 o Minor bugfixes (controller, backport from 0.3.4.2-alpha): 9939 - Improve accuracy of the BUILDTIMEOUT_SET control port event's 9940 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously 9941 miscounting the total number of circuits for these field values.) 9942 Fixes bug 26121; bugfix on 0.3.3.1-alpha. 9943 9944 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha): 9945 - Prevent a possible out-of-bounds smartlist read in 9946 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha. 9947 9948 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha): 9949 - Only select relays when they have the descriptors we prefer to use 9950 for them. This change fixes a bug where we could select a relay 9951 because it had _some_ descriptor, but reject it later with a 9952 nonfatal assertion error because it didn't have the exact one we 9953 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha. 9954 9955 9956Changes in version 0.3.4.2-alpha - 2018-06-12 9957 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha 9958 release, and forward-ports an authority-only security fix from 0.3.3.6. 9959 9960 o Directory authority changes: 9961 - Add an IPv6 address for the "dannenberg" directory authority. 9962 Closes ticket 26343. 9963 9964 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6): 9965 - Fix a bug that could have allowed an attacker to force a directory 9966 authority to use up all its RAM by passing it a maliciously 9967 crafted protocol versions string. Fixes bug 25517; bugfix on 9968 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005. 9969 9970 o Minor features (continuous integration): 9971 - Add the necessary configuration files for continuous integration 9972 testing on Windows, via the Appveyor platform. Closes ticket 9973 25549. Patches from Marcin Cieślak and Isis Lovecruft. 9974 9975 o Minor features (geoip): 9976 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2 9977 Country database. Closes ticket 26351. 9978 9979 o Minor bugfixes (compatibility, openssl): 9980 - Work around a change in OpenSSL 1.1.1 where return values that 9981 would previously indicate "no password" now indicate an empty 9982 password. Without this workaround, Tor instances running with 9983 OpenSSL 1.1.1 would accept descriptors that other Tor instances 9984 would reject. Fixes bug 26116; bugfix on 0.2.5.16. 9985 9986 o Minor bugfixes (compilation): 9987 - Silence unused-const-variable warnings in zstd.h with some GCC 9988 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha. 9989 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated" 9990 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha. 9991 - Avoid a compiler warning when casting the return value of 9992 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug 9993 26283; bugfix on 0.2.4.10-alpha. 9994 9995 o Minor bugfixes (control port): 9996 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in 9997 CIRC_BW events. Previously, such cells were counted entirely in 9998 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix 9999 on 0.3.4.1-alpha. 10000 10001 o Minor bugfixes (controller): 10002 - Improve accuracy of the BUILDTIMEOUT_SET control port event's 10003 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously 10004 miscounting the total number of circuits for these field values.) 10005 Fixes bug 26121; bugfix on 0.3.3.1-alpha. 10006 10007 o Minor bugfixes (hardening): 10008 - Prevent a possible out-of-bounds smartlist read in 10009 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha. 10010 10011 o Minor bugfixes (onion services): 10012 - Fix a bug that blocked the creation of ephemeral v3 onion 10013 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha. 10014 10015 o Minor bugfixes (test coverage tools): 10016 - Update our "cov-diff" script to handle output from the latest 10017 version of gcov, and to remove extraneous timestamp information 10018 from its output. Fixes bugs 26101 and 26102; bugfix 10019 on 0.2.5.1-alpha. 10020 10021 10022Changes in version 0.3.3.6 - 2018-05-22 10023 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It 10024 backports several important fixes from the 0.3.4.1-alpha. 10025 10026 The Tor 0.3.3 series includes controller support and other 10027 improvements for v3 onion services, official support for embedding Tor 10028 within other applications, and our first non-trivial module written in 10029 the Rust programming language. (Rust is still not enabled by default 10030 when building Tor.) And as usual, there are numerous other smaller 10031 bugfixes, features, and improvements. 10032 10033 Below are the changes since 0.3.3.5-rc. For a list of all changes 10034 since 0.3.2.10, see the ReleaseNotes file. 10035 10036 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha): 10037 - When directory authorities read a zero-byte bandwidth file, they 10038 would previously log a warning with the contents of an 10039 uninitialised buffer. They now log a warning about the empty file 10040 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha. 10041 10042 o Major bugfixes (security, directory authority, denial-of-service): 10043 - Fix a bug that could have allowed an attacker to force a directory 10044 authority to use up all its RAM by passing it a maliciously 10045 crafted protocol versions string. Fixes bug 25517; bugfix on 10046 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005. 10047 10048 o Major bugfixes (crash, backport from 0.3.4.1-alpha): 10049 - Avoid a rare assertion failure in the circuit build timeout code 10050 if we fail to allow any circuits to actually complete. Fixes bug 10051 25733; bugfix on 0.2.2.2-alpha. 10052 10053 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha): 10054 - Avoid a crash when testing router reachability on a router that 10055 could have an ed25519 ID, but which does not. Fixes bug 25415; 10056 bugfix on 0.3.3.2-alpha. 10057 10058 o Major bugfixes (onion service, backport from 0.3.4.1-alpha): 10059 - Correctly detect when onion services get disabled after HUP. Fixes 10060 bug 25761; bugfix on 0.3.2.1. 10061 10062 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha): 10063 - Impose a limit on circuit cell queue size. The limit can be 10064 controlled by a consensus parameter. Fixes bug 25226; bugfix 10065 on 0.2.4.14-alpha. 10066 10067 o Minor features (compatibility, backport from 0.3.4.1-alpha): 10068 - Avoid some compilation warnings with recent versions of LibreSSL. 10069 Closes ticket 26006. 10070 10071 o Minor features (continuous integration, backport from 0.3.4.1-alpha): 10072 - Our .travis.yml configuration now includes support for testing the 10073 results of "make distcheck". (It's not uncommon for "make check" 10074 to pass but "make distcheck" to fail.) Closes ticket 25814. 10075 - Our Travis CI configuration now integrates with the Coveralls 10076 coverage analysis tool. Closes ticket 25818. 10077 10078 o Minor features (geoip): 10079 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country 10080 database. Closes ticket 26104. 10081 10082 o Minor bugfixes (client, backport from 0.3.4.1-alpha): 10083 - Don't consider Tor running as a client if the ControlPort is open, 10084 but no actual client ports are open. Fixes bug 26062; bugfix 10085 on 0.2.9.4-alpha. 10086 10087 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha): 10088 - Upon receiving a malformed connected cell, stop processing the 10089 cell immediately. Previously we would mark the connection for 10090 close, but continue processing the cell as if the connection were 10091 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha. 10092 10093 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha): 10094 - Stop saying in the manual that clients cache ipv4 dns answers from 10095 exit relays. We haven't used them since 0.2.6.3-alpha, and in 10096 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but 10097 we forgot to say so in the man page. Fixes bug 26052; bugfix 10098 on 0.3.2.6-alpha. 10099 10100 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha): 10101 - Allow the nanosleep() system call, which glibc uses to implement 10102 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha. 10103 10104 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha): 10105 - Fix a memory leak when a v3 onion service is configured and gets a 10106 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha. 10107 - When parsing the descriptor signature, look for the token plus an 10108 extra white-space at the end. This is more correct but also will 10109 allow us to support new fields that might start with "signature". 10110 Fixes bug 26069; bugfix on 0.3.0.1-alpha. 10111 10112 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha): 10113 - Avoid a crash when running with DirPort set but ORPort turned off. 10114 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha. 10115 10116 o Documentation (backport from 0.3.4.1-alpha): 10117 - Correct an IPv6 error in the documentation for ExitPolicy. Closes 10118 ticket 25857. Patch from "CTassisF". 10119 10120 10121Changes in version 0.3.4.1-alpha - 2018-05-17 10122 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It 10123 includes refactoring to begin reducing Tor's binary size and idle CPU 10124 usage on mobile, along with prep work for new bandwidth scanners, 10125 improvements to the experimental "vanguards" feature, and numerous 10126 other small features and bugfixes. 10127 10128 o New system requirements: 10129 - Tor no longer tries to support old operating systems without 10130 mmap() or some local equivalent. Apparently, compilation on such 10131 systems has been broken for some time, without anybody noticing or 10132 complaining. Closes ticket 25398. 10133 10134 o Major feature (directory authority, modularization): 10135 - The directory authority subsystem has been modularized. The code 10136 is now located in src/or/dirauth/, and is compiled in by default. 10137 To disable the module, the configure option 10138 --disable-module-dirauth has been added. This module may be 10139 disabled by default in some future release. Closes ticket 25610. 10140 10141 o Major features (main loop, CPU usage): 10142 - When Tor is disabled (via DisableNetwork or via hibernation), it 10143 no longer needs to run any per-second events. This change should 10144 make it easier for mobile applications to disable Tor while the 10145 device is sleeping, or Tor is not running. Closes ticket 26063. 10146 - Tor no longer enables all of its periodic events by default. 10147 Previously, Tor would enable all possible main loop events, 10148 regardless of whether it needed them. Furthermore, many of these 10149 events are now disabled with Tor is hibernating or DisableNetwork 10150 is set. This is a big step towards reducing client CPU usage by 10151 reducing the amount of wake-ups the daemon does. Closes ticket 10152 25376 and 25762. 10153 - The bandwidth-limitation logic has been refactored so that 10154 bandwidth calculations are performed on-demand, rather than every 10155 TokenBucketRefillInterval milliseconds. This change should improve 10156 the granularity of our bandwidth calculations, and limit the 10157 number of times that the Tor process needs to wake up when it is 10158 idle. Closes ticket 25373. 10159 - Move responsibility for many operations from a once-per-second 10160 callback to a callback that is only scheduled as needed. Moving 10161 this functionality has allowed us to disable the callback when 10162 Tor's network is disabled. Once enough items are removed from our 10163 once-per-second callback, we can eliminate it entirely to conserve 10164 CPU when idle. The functionality removed includes: closing 10165 connections, circuits, and channels (ticket 25932); consensus 10166 voting (25937); flushing log callbacks (25951); honoring delayed 10167 SIGNEWNYM requests (25949); rescanning the consensus cache 10168 (25931); saving the state file to disk (25948); warning relay 10169 operators about unreachable ports (25952); and keeping track of 10170 Tor's uptime (26009). 10171 10172 o Major bugfixes (directory authorities, security): 10173 - When directory authorities read a zero-byte bandwidth file, they 10174 would previously log a warning with the contents of an 10175 uninitialised buffer. They now log a warning about the empty file 10176 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha. 10177 10178 o Major bugfixes (crash): 10179 - Avoid a rare assertion failure in the circuit build timeout code 10180 if we fail to allow any circuits to actually complete. Fixes bug 10181 25733; bugfix on 0.2.2.2-alpha. 10182 10183 o Major bugfixes (directory authority): 10184 - Avoid a crash when testing router reachability on a router that 10185 could have an ed25519 ID, but which does not. Fixes bug 25415; 10186 bugfix on 0.3.3.2-alpha. 10187 10188 o Major bugfixes (onion service): 10189 - Correctly detect when onion services get disabled after HUP. Fixes 10190 bug 25761; bugfix on 0.3.2.1. 10191 10192 o Major bugfixes (protover, voting): 10193 - Revise Rust implementation of protover to use a more memory- 10194 efficient voting algorithm and corresponding data structures, thus 10195 avoiding a potential (but small impact) DoS attack where specially 10196 crafted protocol strings would expand to several potential 10197 megabytes in memory. In the process, several portions of code were 10198 revised to be methods on new, custom types, rather than functions 10199 taking interchangeable types, thus increasing type safety of the 10200 module. Custom error types and handling were added as well, in 10201 order to facilitate better error dismissal/handling in outside 10202 crates and avoid mistakenly passing an internal error string to C 10203 over the FFI boundary. Many tests were added, and some previous 10204 differences between the C and Rust implementations have been 10205 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha. 10206 10207 o Major bugfixes (relay, denial of service): 10208 - Impose a limit on circuit cell queue size. The limit can be 10209 controlled by a consensus parameter. Fixes bug 25226; bugfix 10210 on 0.2.4.14-alpha. 10211 10212 o Minor features (accounting): 10213 - When Tor becomes dormant, it now uses a scheduled event to wake up 10214 at the right time. Previously, we would use the per-second timer 10215 to check whether to wake up, but we no longer have any per-second 10216 timers enabled when the network is disabled. Closes ticket 26064. 10217 10218 o Minor features (code quality): 10219 - Add optional spell-checking for the Tor codebase, using the 10220 "misspell" program. To use this feature, run "make check-typos". 10221 Closes ticket 25024. 10222 10223 o Minor features (compatibility): 10224 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with 10225 the no-deprecated option, and builds correctly with them. Closes 10226 tickets 19429, 19981, and 25353. 10227 - Avoid some compilation warnings with recent versions of LibreSSL. 10228 Closes ticket 26006. 10229 10230 o Minor features (compression, zstd): 10231 - When running with zstd, Tor now considers using advanced functions 10232 that the zstd maintainers have labeled as potentially unstable. To 10233 prevent breakage, Tor will only use this functionality when the 10234 runtime version of the zstd library matches the version with which 10235 Tor was compiled. Closes ticket 25162. 10236 10237 o Minor features (configuration): 10238 - The "DownloadSchedule" options have been renamed to end with 10239 "DownloadInitialDelay". The old names are still allowed, but will 10240 produce a warning. Comma-separated lists are still permitted for 10241 these options, but all values after the first are ignored (as they 10242 have been since 0.2.9). Closes ticket 23354. 10243 10244 o Minor features (continuous integration): 10245 - Our .travis.yml configuration now includes support for testing the 10246 results of "make distcheck". (It's not uncommon for "make check" 10247 to pass but "make distcheck" to fail.) Closes ticket 25814. 10248 - Our Travis CI configuration now integrates with the Coveralls 10249 coverage analysis tool. Closes ticket 25818. 10250 10251 o Minor features (control port): 10252 - Introduce GETINFO "current-time/{local,utc}" to return the local 10253 and UTC times respectively in ISO format. This helps a controller 10254 like Tor Browser detect a time-related error. Closes ticket 25511. 10255 Patch by Neel Chauhan. 10256 - Introduce new fields to the CIRC_BW event. There are two new 10257 fields in each of the read and written directions. The DELIVERED 10258 fields report the total valid data on the circuit, as measured by 10259 the payload sizes of verified and error-checked relay command 10260 cells. The OVERHEAD fields report the total unused bytes in each 10261 of these cells. Closes ticket 25903. 10262 10263 o Minor features (directory authority): 10264 - Directory authorities now open their key-pinning files as O_SYNC, 10265 to limit their chances of accidentally writing partial lines. 10266 Closes ticket 23909. 10267 10268 o Minor features (directory authority, forward compatibility): 10269 - Make the lines of the measured bandwidth file able to contain 10270 their entries in any order. Previously, the node_id entry needed 10271 to come first. Closes ticket 26004. 10272 10273 o Minor features (entry guards): 10274 - Introduce a new torrc option NumPrimaryGuards for controlling the 10275 number of primary guards. Closes ticket 25843. 10276 10277 o Minor features (geoip): 10278 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country 10279 database. Closes ticket 26104. 10280 10281 o Minor features (performance): 10282 - Avoid a needless call to malloc() when processing an incoming 10283 relay cell. Closes ticket 24914. 10284 - Make our timing-wheel code run a tiny bit faster on 32-bit 10285 platforms, by preferring 32-bit math to 64-bit. Closes 10286 ticket 24688. 10287 - Avoid a needless malloc()/free() pair every time we handle an ntor 10288 handshake. Closes ticket 25150. 10289 10290 o Minor features (testing): 10291 - Add a unit test for voting_schedule_get_start_of_next_interval(). 10292 Closes ticket 26014, and helps make unit test coverage 10293 more deterministic. 10294 - A new unittests module specifically for testing the functions in 10295 the (new-ish) bridges.c module has been created with new 10296 unittests, raising the code coverage percentages. Closes 25425. 10297 - We now have improved testing for addressmap_get_virtual_address() 10298 function. This should improve our test coverage, and make our test 10299 coverage more deterministic. Closes ticket 25993. 10300 10301 o Minor features (timekeeping, circuit scheduling): 10302 - When keeping track of how busy each circuit have been recently on 10303 a given connection, use coarse-grained monotonic timers rather 10304 than gettimeofday(). This change should marginally increase 10305 accuracy and performance. Implements part of ticket 25927. 10306 10307 o Minor bugfixes (bandwidth management): 10308 - Consider ourselves "low on write bandwidth" if we have exhausted 10309 our write bandwidth some time in the last second. This was the 10310 documented behavior before, but the actual behavior was to change 10311 this value every TokenBucketRefillInterval. Fixes bug 25828; 10312 bugfix on 0.2.3.5-alpha. 10313 10314 o Minor bugfixes (C correctness): 10315 - Add a missing lock acquisition in the shutdown code of the control 10316 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by 10317 Coverity; this is CID 1433643. 10318 10319 o Minor bugfixes (circuit path selection): 10320 - Don't count path selection failures as circuit build failures. 10321 This change should eliminate cases where Tor blames its guard or 10322 the network for situations like insufficient microdescriptors 10323 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix 10324 on 0.3.3.1-alpha. 10325 10326 o Minor bugfixes (client): 10327 - Don't consider Tor running as a client if the ControlPort is open, 10328 but no actual client ports are open. Fixes bug 26062; bugfix 10329 on 0.2.9.4-alpha. 10330 10331 o Minor bugfixes (code style): 10332 - Fixed multiple includes of transports.h in src/or/connection.c 10333 Fixes bug 25261; bugfix on 0.2.5.1-alpha. 10334 - Remove the unused variable n_possible from the function 10335 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha 10336 10337 o Minor bugfixes (control interface): 10338 - Respond with more human-readable error messages to GETINFO exit- 10339 policy/* requests. Also, let controller know if an error is 10340 transient (response code 551) or not (response code 552). Fixes 10341 bug 25852; bugfix on 0.2.8.1-alpha. 10342 10343 o Minor bugfixes (controller): 10344 - Make CIRC_BW event reflect the total of all data sent on a 10345 circuit, including padding and dropped cells. Also fix a mis- 10346 counting bug when STREAM_BW events were enabled. Fixes bug 25400; 10347 bugfix on 0.2.5.2-alpha. 10348 10349 o Minor bugfixes (correctness, client): 10350 - Upon receiving a malformed connected cell, stop processing the cell 10351 immediately. Previously we would mark the connection for close, but 10352 continue processing the cell as if the connection were open. Fixes bug 10353 26072; bugfix on 0.2.4.7-alpha. 10354 10355 o Minor bugfixes (directory client): 10356 - When unverified-consensus is verified, rename it to cached- 10357 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha. 10358 - Fixed launching a certificate fetch always during the scheduled 10359 periodic consensus fetch by fetching only in those cases when 10360 consensus are waiting for certs. Fixes bug 24740; bugfix 10361 on 0.2.9.1-alpha. 10362 10363 o Minor bugfixes (documentation): 10364 - Stop saying in the manual that clients cache ipv4 dns answers from 10365 exit relays. We haven't used them since 0.2.6.3-alpha, and in 10366 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but 10367 we forgot to say so in the man page. Fixes bug 26052; bugfix 10368 on 0.3.2.6-alpha. 10369 10370 o Minor bugfixes (error reporting): 10371 - Improve tolerance for directory authorities with skewed clocks. 10372 Previously, an authority with a clock more than 60 seconds ahead 10373 could cause a client with a correct clock to warn that the 10374 client's clock was behind. Now the clocks of a majority of 10375 directory authorities have to be ahead of the client before this 10376 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha. 10377 10378 o Minor bugfixes (Linux seccomp2 sandbox): 10379 - Allow the nanosleep() system call, which glibc uses to implement 10380 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha. 10381 10382 o Minor bugfixes (onion service): 10383 - Fix a memory leak when a v3 onion service is configured and gets a 10384 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha. 10385 - When parsing the descriptor signature, look for the token plus an 10386 extra white-space at the end. This is more correct but also will 10387 allow us to support new fields that might start with "signature". 10388 Fixes bug 26069; bugfix on 0.3.0.1-alpha. 10389 10390 o Minor bugfixes (path selection): 10391 - Only select relays when they have the descriptors we prefer to use 10392 for them. This change fixes a bug where we could select a relay 10393 because it had _some_ descriptor, but reject it later with a 10394 nonfatal assertion error because it didn't have the exact one we 10395 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha. 10396 10397 o Minor bugfixes (portability): 10398 - Do not align mmap length, as it is not required by POSIX, and the 10399 getpagesize function is deprecated. Fixes bug 25399; bugfix 10400 on 0.1.1.23. 10401 10402 o Minor bugfixes (portability, FreeBSD): 10403 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB 10404 does not stringify on FreeBSD, so we switch to tor_asprintf(). 10405 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan. 10406 10407 o Minor bugfixes (relay statistics): 10408 - When a relay is collecting internal statistics about how many 10409 create cell requests it has seen of each type, accurately count 10410 the requests from relays that temporarily fall out of the 10411 consensus. (To be extra conservative, we were already ignoring 10412 requests from clients in our counts, and we continue ignoring them 10413 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc. 10414 10415 o Minor bugfixes (relay, crash): 10416 - Avoid a crash when running with DirPort set but ORPort turned off. 10417 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha. 10418 10419 o Minor bugfixes (restart-in-process): 10420 - When shutting down, Tor now clears all the flags in the control.c 10421 module. This should prevent a bug where authentication cookies are 10422 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha. 10423 10424 o Minor bugfixes (testing): 10425 - When testing workqueue event-cancellation, make sure that we 10426 actually cancel an event, and that cancel each event with equal 10427 probability. (It was previously possible, though extremely 10428 unlikely, for our event-canceling test not to cancel any events.) 10429 Fixes bug 26008; bugfix on 0.2.6.3-alpha. 10430 - Repeat part of the test in test_client_pick_intro() a number of 10431 times, to give it consistent coverage. Fixes bug 25996; bugfix 10432 on 0.3.2.1-alpha. 10433 - Remove randomness from the hs_common/responsible_hsdirs test, so 10434 that it always takes the same path through the function it tests. 10435 Fixes bug 25997; bugfix on 0.3.2.1-alpha. 10436 - Change the behavior of the "channel/outbound" test so that it 10437 never causes a 10-second rollover for the EWMA circuitmux code. 10438 Previously, this behavior would happen randomly, and result in 10439 fluctuating test coverage. Fixes bug 25994; bugfix 10440 on 0.3.3.1-alpha. 10441 - Use X509_new() to allocate certificates that will be freed later 10442 with X509_free(). Previously, some parts of the unit tests had 10443 used tor_malloc_zero(), which is incorrect, and which caused test 10444 failures on Windows when they were built with extra hardening. 10445 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by 10446 Marcin Cieślak. 10447 - While running the circuit_timeout test, fix the PRNG to a 10448 deterministic AES stream, so that the test coverage from this test 10449 will itself be deterministic. Fixes bug 25995; bugfix 10450 on 0.2.2.2-alpha. 10451 10452 o Minor bugfixes (vanguards): 10453 - Allow the last hop in a vanguard circuit to be the same as our 10454 first, to prevent the adversary from influencing guard node choice 10455 by choice of last hop. Also prevent the creation of A - B - A 10456 paths, or A - A paths, which are forbidden by relays. Fixes bug 10457 25870; bugfix on 0.3.3.1-alpha. 10458 10459 o Code simplification and refactoring: 10460 - Remove duplicate code in parse_{c,s}method_line and bootstrap 10461 their functionalities into a single function. Fixes bug 6236; 10462 bugfix on 0.2.3.6-alpha. 10463 - We remove the PortForwarding and PortForwardingHelper options, 10464 related functions, and the port_forwarding tests. These options 10465 were used by the now-deprecated Vidalia to help ordinary users 10466 become Tor relays or bridges. Closes ticket 25409. Patch by 10467 Neel Chauhan. 10468 - In order to make the OR and dir checking function in router.c less 10469 confusing we renamed some functions and 10470 consider_testing_reachability() has been split into 10471 router_should_check_reachability() and 10472 router_do_reachability_checks(). Also we improved the documentation 10473 in some functions. Closes ticket 18918. 10474 - Initial work to isolate Libevent usage to a handful of modules in 10475 our codebase, to simplify our call structure, and so that we can 10476 more easily change event loops in the future if needed. Closes 10477 ticket 23750. 10478 - Introduce a function to call getsockname() and return tor_addr_t, 10479 to save a little complexity throughout the codebase. Closes 10480 ticket 18105. 10481 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer 10482 as hsdir_index is always present. Also, we move hsdir_index_t into 10483 or.h. Closes ticket 23094. Patch by Neel Chauhan. 10484 - Merge functions used for describing nodes and suppress the 10485 functions that do not allocate memory for the output buffer 10486 string. NODE_DESC_BUF_LEN constant and format_node_description() 10487 function cannot be used externally from router.c module anymore. 10488 Closes ticket 25432. Patch by valentecaio. 10489 - Our main loop has been simplified so that all important operations 10490 happen inside events. Previously, some operations had to happen 10491 outside the event loop, to prevent infinite sequences of event 10492 activations. Closes ticket 25374. 10493 - Put a SHA1 public key digest in hs_service_intro_point_t, and use 10494 it in register_intro_circ() and service_intro_point_new(). This 10495 prevents the digest from being re-calculated each time. Closes 10496 ticket 23107. Patch by Neel Chauhan. 10497 - Refactor token-bucket implementations to use a common backend. 10498 Closes ticket 25766. 10499 - Remove extern declaration of stats_n_seconds_working variable from 10500 main, protecting its accesses with get_uptime() and reset_uptime() 10501 functions. Closes ticket 25081, patch by “valentecaio”. 10502 - Remove our previous logic for "cached gettimeofday()" -- our 10503 coarse monotonic timers are fast enough for this purpose, and far 10504 less error-prone. Implements part of ticket 25927. 10505 - Remove the return value for fascist_firewall_choose_address_base(), 10506 and sister functions such as fascist_firewall_choose_address_node() 10507 and fascist_firewall_choose_address_rs(). Also, while we're here, 10508 initialize the ap argument as leaving it uninitialized can pose a 10509 security hazard. Closes ticket 24734. Patch by Neel Chauhan. 10510 - Rename two fields of connection_t struct. timestamp_lastwritten is 10511 renamed to timestamp_last_write_allowed and timestamp_lastread is 10512 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch 10513 by "valentecaio". 10514 - Since Tor requires C99, remove our old workaround code for libc 10515 implementations where free(NULL) doesn't work. Closes ticket 24484. 10516 - Use our standard rate-limiting code to deal with excessive 10517 libevent failures, rather than the hand-rolled logic we had 10518 before. Closes ticket 26016. 10519 - We remove the return value of node_get_prim_orport() and 10520 node_get_prim_dirport(), and introduce node_get_prim_orport() in 10521 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to 10522 check for a null address. Closes ticket 23873. Patch by 10523 Neel Chauhan. 10524 - We switch to should_record_bridge_info() in 10525 geoip_note_client_seen() and options_need_geoip_info() instead of 10526 accessing the configuration values directly. Fixes bug 25290; 10527 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan. 10528 10529 o Deprecated features: 10530 - As we are not recommending 0.2.5 anymore, we require relays that 10531 once had an ed25519 key associated with their RSA key to always 10532 have that key, instead of allowing them to drop back to a version 10533 that didn't support ed25519. This means they need to use a new RSA 10534 key if they want to downgrade to an older version of tor without 10535 ed25519. Closes ticket 20522. 10536 10537 o Documentation: 10538 - Correct an IPv6 error in the documentation for ExitPolicy. Closes 10539 ticket 25857. Patch from "CTassisF". 10540 10541 o Removed features: 10542 - Directory authorities will no longer support voting according to 10543 any consensus method before consensus method 25. This keeps 10544 authorities compatible with all authorities running 0.2.9.8 and 10545 later, and does not break any clients or relays. Implements ticket 10546 24378 and proposal 290. 10547 - The PortForwarding and PortForwardingHelper features have been 10548 removed. The reasoning is, given that implementations of NAT 10549 traversal protocols within common consumer grade routers are 10550 frequently buggy, and that the target audience for a NAT punching 10551 feature is a perhaps less-technically-inclined relay operator, 10552 when the helper fails to setup traversal the problems are usually 10553 deep, ugly, and very router specific, making them horrendously 10554 impossible for technical support to reliable assist with, and thus 10555 resulting in frustration all around. Unfortunately, relay 10556 operators who would like to run relays behind NATs will need to 10557 become more familiar with the port forwarding configurations on 10558 their local router. Closes 25409. 10559 - The TestingEnableTbEmptyEvent option has been removed. It was used 10560 in testing simulations to measure how often connection buckets 10561 were emptied, in order to improve our scheduling, but it has not 10562 been actively used in years. Closes ticket 25760. 10563 - The old "round-robin" circuit multiplexer (circuitmux) 10564 implementation has been removed, along with a fairly large set of 10565 code that existed to support it. It has not been the default 10566 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x, 10567 but it still required an unreasonable amount of memory and CPU. 10568 Closes ticket 25268. 10569 10570 10571Changes in version 0.3.3.5-rc - 2018-04-15 10572 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor, 10573 including some that could affect reliability or correctness. 10574 10575 This is the first release candidate in the 0.3.3 series. If we find no 10576 new bugs or regression here, then the first stable 0.3.3 release will 10577 be nearly identical to this one. 10578 10579 o Major bugfixes (security, protover, voting): 10580 - Revise Rust implementation of protover to use a more memory- 10581 efficient voting algorithm and corresponding data structures, thus 10582 avoiding a potential memory-based DoS attack where specially 10583 crafted protocol strings would expand to fill available memory. 10584 Fixes bug 24031; bugfix on 0.3.3.1-alpha. 10585 10586 o Major bugfixes (performance, load balancing): 10587 - Directory authorities no longer vote in favor of the Guard flag 10588 for relays without directory support. Starting in Tor 10589 0.3.0.1-alpha, clients have been avoiding using such relays in the 10590 Guard position, leading to increasingly broken load balancing for 10591 the 5%-or-so of Guards that don't advertise directory support. 10592 Fixes bug 22310; bugfix on 0.3.0.6. 10593 10594 o Minor feature (continuous integration): 10595 - Update the Travis CI configuration to use the stable Rust channel, 10596 now that we have decided to require that. Closes ticket 25714. 10597 10598 o Minor features (config options): 10599 - Change the way the default value for MaxMemInQueues is calculated. 10600 We now use 40% of the hardware RAM if the system has 8 GB RAM or 10601 more. Otherwise we use the former value of 75%. Closes 10602 ticket 24782. 10603 10604 o Minor features (geoip): 10605 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2 10606 Country database. Closes ticket 25718. 10607 10608 o Minor bugfixes (client): 10609 - When using a listed relay as a bridge, and also using 10610 microdescriptors, and considering that relay as a non-bridge in a 10611 circuit, treat its microdescriptor as a valid source of 10612 information about that relay. This change should prevent a non- 10613 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha. 10614 10615 o Minor bugfixes (controller): 10616 - Restore the correct operation of the RESOLVE command, which had 10617 been broken since we added the ability to enable/disable DNS on 10618 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha. 10619 10620 o Minor bugfixes (distribution, compilation, rust): 10621 - Build correctly when the rust dependencies submodule is loaded, 10622 but the TOR_RUST_DEPENDENCIES environment variable is not set. 10623 Fixes bug 25679; bugfix on 0.3.3.1-alpha. 10624 - Actually include all of our Rust source in our source 10625 distributions. (Previously, a few of the files were accidentally 10626 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha. 10627 10628 o Minor bugfixes (documentation): 10629 - Document that the PerConnBW{Rate,Burst} options will fall back to 10630 their corresponding consensus parameters only if those parameters 10631 are set. Previously we had claimed that these values would always 10632 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha. 10633 - Revert a misformatting issue in the ExitPolicy documentation. 10634 Fixes bug 25582; bugfix on 0.3.3.1-alpha. 10635 10636 o Minor bugfixes (exit relay DNS retries): 10637 - Re-attempt timed-out DNS queries 3 times before failure, since our 10638 timeout is 5 seconds for them, but clients wait 10-15. Also allow 10639 slightly more timeouts per resolver when an exit has multiple 10640 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9. 10641 10642 o Minor bugfixes (onion services): 10643 - Re-instate counting the client HSDir fetch circuits against the 10644 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix 10645 on 0.3.3.1-alpha. 10646 - Remove underscores from the _HSLayer{2,3}Nodes options. This 10647 expert-user configuration can now be enabled as HSLayer{2,3}Nodes. 10648 Fixes bug 25581; bugfix on 0.3.3.1-alpha 10649 10650 o Code simplification and refactoring: 10651 - Move the list of default directory authorities to its own file. 10652 Closes ticket 24854. Patch by "beastr0". 10653 10654 o Documentation (manpage, denial of service): 10655 - Provide more detail about the denial-of-service options, by 10656 listing each mitigation and explaining how they relate. Closes 10657 ticket 25248. 10658 10659 10660Changes in version 0.3.3.4-alpha - 2018-03-29 10661 Tor 0.3.3.4-alpha includes various bugfixes for issues found during 10662 the alpha testing of earlier releases in its series. We are 10663 approaching a stable 0.3.3.4-alpha release: more testing is welcome! 10664 10665 o New system requirements: 10666 - When built with Rust, Tor now depends on version 0.2.39 of the 10667 libc crate. Closes tickets 25310 and 25664. 10668 10669 o Major bugfixes (relay, connection): 10670 - If we have failed to connect to a relay and received a connection 10671 refused, timeout, or similar error (at the TCP level), do not try 10672 that same address/port again for 60 seconds after the failure has 10673 occurred. Fixes bug 24767; bugfix on 0.0.6. 10674 10675 o Minor features (geoip): 10676 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2 10677 Country database. Closes ticket 25469. 10678 10679 o Minor features (log messages): 10680 - Improve log message in the out-of-memory handler to include 10681 information about memory usage from the different compression 10682 backends. Closes ticket 25372. 10683 10684 o Minor features (sandbox): 10685 - Explicitly permit the poll() system call when the Linux 10686 seccomp2-based sandbox is enabled: apparently, some versions of 10687 libc use poll() when calling getpwnam(). Closes ticket 25313. 10688 10689 o Minor bugfixes (C correctness): 10690 - Fix a very unlikely (impossible, we believe) null pointer 10691 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by 10692 Coverity; this is CID 1430932. 10693 10694 o Minor bugfixes (channel, client): 10695 - Better identify client connection when reporting to the geoip 10696 client cache. Fixes bug 24904; bugfix on 0.3.1.7. 10697 10698 o Minor bugfixes (compilation): 10699 - Fix a C99 compliance issue in our configuration script that caused 10700 compilation issues when compiling Tor with certain versions of 10701 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha. 10702 10703 o Minor bugfixes (controller, reliability): 10704 - Avoid a (nonfatal) assertion failure when extending a one-hop 10705 circuit from the controller to become a multihop circuit. Fixes 10706 bug 24903; bugfix on 0.2.5.2-alpha. 10707 10708 o Major bugfixes (networking): 10709 - Tor will no longer reject IPv6 address strings from Tor Browser 10710 when they are passed as hostnames in SOCKS5 requests. Fixes bug 10711 25036, bugfix on Tor 0.3.1.2. 10712 10713 o Minor bugfixes (networking): 10714 - string_is_valid_hostname() will not consider IP strings to be 10715 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5. 10716 10717 o Minor bugfixes (onion service v3): 10718 - Avoid an assertion failure when the next onion service 10719 descriptor rotation type is out of sync with the consensus's 10720 valid-after time. Instead, log a warning message with extra 10721 information, so we can better hunt down the cause of this 10722 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha. 10723 10724 o Minor bugfixes (testing): 10725 - Avoid intermittent test failures due to a test that had relied on 10726 onion service introduction point creation finishing within 5 10727 seconds of real clock time. Fixes bug 25450; bugfix 10728 on 0.3.1.3-alpha. 10729 - Rust crates are now automatically detected and tested. Previously, 10730 some crates were not tested by `make test-rust` due to a static 10731 string in the `src/test/test_rust.sh` script specifying which 10732 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha. 10733 10734 o Minor bugfixes (testing, benchmarks): 10735 - Fix a crash when running benchmark tests on win32 systems. The 10736 crash was due to a mutex that wasn't initialized before logging 10737 and options were initialized. Fixes bug 25479; bugfix 10738 on 0.3.3.3-alpha. 10739 10740 o Minor bugfixes (warnings, ipv6): 10741 - Avoid a bug warning that could occur when trying to connect to a 10742 relay over IPv6. This warning would occur on a Tor instance that 10743 downloads router descriptors, but prefers to use microdescriptors. 10744 Fixes bug 25213; bugfix on 0.3.3.1-alpha. 10745 10746 o Code simplification and refactoring: 10747 - Remove the old (deterministic) directory retry logic entirely: 10748 We've used exponential backoff exclusively for some time. Closes 10749 ticket 23814. 10750 10751 o Documentation: 10752 - Improved the documentation of AccountingStart parameter. Closes 10753 ticket 23635. 10754 - Update the documentation for "Log" to include the current list of 10755 logging domains. Closes ticket 25378. 10756 10757 10758Changes in version 0.3.1.10 - 2018-03-03 10759 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for 10760 security issues. 10761 10762 It includes an important security fix for a remote crash attack 10763 against directory authorities, tracked as TROVE-2018-001. 10764 10765 This release also backports our new system for improved resistance to 10766 denial-of-service attacks against relays. 10767 10768 This release also fixes several minor bugs and annoyances from 10769 earlier releases. 10770 10771 All directory authorities should upgrade to one of the versions 10772 released today. Relays running 0.3.1.x may wish to update to one of 10773 the versions released today, for the DoS mitigations. 10774 10775 Please note: according to our release calendar, Tor 0.3.1 will no 10776 longer be supported after 1 July 2018. If you will be running Tor 10777 after that date, you should make sure to plan to upgrade to the latest 10778 stable version, or downgrade to 0.2.9 (which will receive long-term 10779 support). 10780 10781 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha): 10782 - Fix a protocol-list handling bug that could be used to remotely crash 10783 directory authorities with a null-pointer exception. Fixes bug 25074; 10784 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and 10785 CVE-2018-0490. 10786 10787 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha): 10788 - Give relays some defenses against the recent network overload. We 10789 start with three defenses (default parameters in parentheses). 10790 First: if a single client address makes too many concurrent 10791 connections (>100), hang up on further connections. Second: if a 10792 single client address makes circuits too quickly (more than 3 per 10793 second, with an allowed burst of 90) while also having too many 10794 connections open (3), refuse new create cells for the next while 10795 (1-2 hours). Third: if a client asks to establish a rendezvous 10796 point to you directly, ignore the request. These defenses can be 10797 manually controlled by new torrc options, but relays will also 10798 take guidance from consensus parameters, so there's no need to 10799 configure anything manually. Implements ticket 24902. 10800 10801 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha): 10802 - Update the sandbox rules so that they should now work correctly 10803 with Glibc 2.26. Closes ticket 24315. 10804 10805 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha): 10806 - Fix an "off by 2" error in counting rendezvous failures on the 10807 onion service side. While we thought we would stop the rendezvous 10808 attempt after one failed circuit, we were actually making three 10809 circuit attempts before giving up. Now switch to a default of 2, 10810 and allow the consensus parameter "hs_service_max_rdv_failures" to 10811 override. Fixes bug 24895; bugfix on 0.0.6. 10812 10813 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha): 10814 - Add Link protocol version 5 to the supported protocols list. Fixes 10815 bug 25070; bugfix on 0.3.1.1-alpha. 10816 10817 o Major bugfixes (relay, backport from 0.3.3.1-alpha): 10818 - Fix a set of false positives where relays would consider 10819 connections to other relays as being client-only connections (and 10820 thus e.g. deserving different link padding schemes) if those 10821 relays fell out of the consensus briefly. Now we look only at the 10822 initial handshake and whether the connection authenticated as a 10823 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha. 10824 10825 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha): 10826 - Make our OOM handler aware of the geoip client history cache so it 10827 doesn't fill up the memory. This check is important for IPv6 and 10828 our DoS mitigation subsystem. Closes ticket 25122. 10829 10830 o Minor feature (relay statistics, backport from 0.3.2.6-alpha): 10831 - Change relay bandwidth reporting stats interval from 4 hours to 24 10832 hours in order to reduce the efficiency of guard discovery 10833 attacks. Fixes ticket 23856. 10834 10835 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha): 10836 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released. 10837 Previous versions of Tor would not have worked with OpenSSL 1.1.1, 10838 since they neither disabled TLS 1.3 nor enabled any of the 10839 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites. 10840 Closes ticket 24978. 10841 10842 o Minor features (fallback directory mirrors, backport from 0.3.2.9): 10843 - The fallback directory list has been re-generated based on the 10844 current status of the network. Tor uses fallback directories to 10845 bootstrap when it doesn't yet have up-to-date directory 10846 information. Closes ticket 24801. 10847 - Make the default DirAuthorityFallbackRate 0.1, so that clients 10848 prefer to bootstrap from fallback directory mirrors. This is a 10849 follow-up to 24679, which removed weights from the default 10850 fallbacks. Implements ticket 24681. 10851 10852 o Minor features (geoip): 10853 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2 10854 Country database. 10855 10856 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha): 10857 - Use the actual observed address of an incoming relay connection, 10858 not the canonical address of the relay from its descriptor, when 10859 making decisions about how to handle the incoming connection. 10860 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera". 10861 10862 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha): 10863 - Directory authorities, when refusing a descriptor from a rejected 10864 relay, now explicitly tell the relay (in its logs) to set a valid 10865 ContactInfo address and contact the bad-relays@ mailing list. 10866 Fixes bug 25170; bugfix on 0.2.9.1. 10867 10868 o Minor bugfixes (address selection, backport from 0.3.2.9): 10869 - When the fascist_firewall_choose_address_ functions don't find a 10870 reachable address, set the returned address to the null address 10871 and port. This is a precautionary measure, because some callers do 10872 not check the return value. Fixes bug 24736; bugfix 10873 on 0.2.8.2-alpha. 10874 10875 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha): 10876 - Fetch descriptors aggressively whenever we lack enough to build 10877 circuits, regardless of how many descriptors we are missing. 10878 Previously, we would delay launching the fetch when we had fewer 10879 than 15 missing descriptors, even if some of those descriptors 10880 were blocking circuits from building. Fixes bug 23985; bugfix on 10881 0.1.1.11-alpha. The effects of this bug became worse in 10882 0.3.0.3-alpha, when we began treating missing descriptors from our 10883 primary guards as a reason to delay circuits. 10884 - Don't try fetching microdescriptors from relays that have failed 10885 to deliver them in the past. Fixes bug 23817; bugfix 10886 on 0.3.0.1-alpha. 10887 10888 o Minor bugfixes (compilation, backport from 0.3.2.7-rc): 10889 - Fix a signed/unsigned comparison warning introduced by our fix to 10890 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16. 10891 10892 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha): 10893 - Avoid a crash when attempting to use the seccomp2 sandbox together 10894 with the OwningControllerProcess feature. Fixes bug 24198; bugfix 10895 on 0.2.5.1-alpha. 10896 10897 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha): 10898 - Fix a possible crash on malformed consensus. If a consensus had 10899 contained an unparseable protocol line, it could have made clients 10900 and relays crash with a null-pointer exception. To exploit this 10901 issue, however, an attacker would need to be able to subvert the 10902 directory authority system. Fixes bug 25251; bugfix on 10903 0.2.9.4-alpha. Also tracked as TROVE-2018-004. 10904 10905 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha): 10906 - Recover better from empty or corrupt files in the consensus cache 10907 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha. 10908 - When a consensus diff calculation is only partially successful, 10909 only record the successful parts as having succeeded. Partial 10910 success can happen if (for example) one compression method fails 10911 but the others succeed. Previously we misrecorded all the 10912 calculations as having succeeded, which would later cause a 10913 nonfatal assertion failure. Fixes bug 24086; bugfix 10914 on 0.3.1.1-alpha. 10915 10916 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha): 10917 - Tor now updates its guard state when it reads a consensus 10918 regardless of whether it's missing descriptors. That makes tor use 10919 its primary guards to fetch descriptors in some edge cases where 10920 it would previously have used fallback directories. Fixes bug 10921 23862; bugfix on 0.3.0.1-alpha. 10922 10923 o Minor bugfixes (logging, backport from 0.3.3.2-alpha): 10924 - Don't treat inability to store a cached consensus object as a bug: 10925 it can happen normally when we are out of disk space. Fixes bug 10926 24859; bugfix on 0.3.1.1-alpha. 10927 10928 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc): 10929 - When queuing DESTROY cells on a channel, only queue the circuit-id 10930 and reason fields: not the entire 514-byte cell. This fix should 10931 help mitigate any bugs or attacks that fill up these queues, and 10932 free more RAM for other uses. Fixes bug 24666; bugfix 10933 on 0.2.5.1-alpha. 10934 10935 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha): 10936 - When closing a connection via close_connection_immediately(), we 10937 mark it as "not blocked on bandwidth", to prevent later calls from 10938 trying to unblock it, and give it permission to read. This fixes a 10939 backtrace warning that can happen on relays under various 10940 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc. 10941 10942 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha): 10943 - When selecting relays by bandwidth, avoid a rounding error that 10944 could sometimes cause load to be imbalanced incorrectly. 10945 Previously, we would always round upwards; now, we round towards 10946 the nearest integer. This had the biggest effect when a relay's 10947 weight adjustments should have given it weight 0, but it got 10948 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha. 10949 - When calculating the fraction of nodes that have descriptors, and 10950 all nodes in the network have zero bandwidths, count the number of 10951 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha. 10952 - Actually log the total bandwidth in compute_weighted_bandwidths(). 10953 Fixes bug 24170; bugfix on 0.2.4.3-alpha. 10954 10955 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha): 10956 - Improve the performance of our consensus-diff application code 10957 when Tor is built with the --enable-fragile-hardening option set. 10958 Fixes bug 24826; bugfix on 0.3.1.1-alpha. 10959 10960 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha): 10961 - Don't exit the Tor process if setrlimit() fails to change the file 10962 limit (which can happen sometimes on some versions of OSX). Fixes 10963 bug 21074; bugfix on 0.0.9pre5. 10964 10965 o Minor bugfixes (portability, msvc, backport from 0.3.2.9): 10966 - Fix a bug in the bit-counting parts of our timing-wheel code on 10967 MSVC. (Note that MSVC is still not a supported build platform, due 10968 to cyptographic timing channel risks.) Fixes bug 24633; bugfix 10969 on 0.2.9.1-alpha. 10970 10971 o Minor bugfixes (relay, partial backport): 10972 - Make the internal channel_is_client() function look at what sort 10973 of connection handshake the other side used, rather than whether 10974 the other side ever sent a create_fast cell to us. Backports part 10975 of the fixes from bugs 22805 and 24898. 10976 10977 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha): 10978 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on 10979 0.2.9.4-alpha. 10980 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249; 10981 bugfix on 0.2.9.4-alpha. 10982 10983 o Code simplification and refactoring (backport from 0.3.3.3-alpha): 10984 - Update the "rust dependencies" submodule to be a project-level 10985 repository, rather than a user repository. Closes ticket 25323. 10986 10987 10988Changes in version 0.2.9.15 - 2018-03-03 10989 Tor 0.2.9.15 backports important security and stability bugfixes from 10990 later Tor releases. 10991 10992 It includes an important security fix for a remote crash attack 10993 against directory authorities, tracked as TROVE-2018-001. 10994 10995 This release also backports our new system for improved resistance to 10996 denial-of-service attacks against relays. 10997 10998 This release also fixes several minor bugs and annoyances from 10999 earlier releases. 11000 11001 All directory authorities should upgrade to one of the versions 11002 released today. Relays running 0.2.9.x may wish to update to one of 11003 the versions released today, for the DoS mitigations. 11004 11005 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha): 11006 - Fix a protocol-list handling bug that could be used to remotely crash 11007 directory authorities with a null-pointer exception. Fixes bug 25074; 11008 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and 11009 CVE-2018-0490. 11010 11011 o Major features (denial-of-service mitigation): 11012 - Give relays some defenses against the recent network overload. We 11013 start with three defenses (default parameters in parentheses). 11014 First: if a single client address makes too many concurrent 11015 connections (>100), hang up on further connections. Second: if a 11016 single client address makes circuits too quickly (more than 3 per 11017 second, with an allowed burst of 90) while also having too many 11018 connections open (3), refuse new create cells for the next while 11019 (1-2 hours). Third: if a client asks to establish a rendezvous 11020 point to you directly, ignore the request. These defenses can be 11021 manually controlled by new torrc options, but relays will also 11022 take guidance from consensus parameters, so there's no need to 11023 configure anything manually. Implements ticket 24902. 11024 11025 o Major bugfixes (bootstrapping): 11026 - Fetch descriptors aggressively whenever we lack enough to build 11027 circuits, regardless of how many descriptors we are missing. 11028 Previously, we would delay launching the fetch when we had fewer 11029 than 15 missing descriptors, even if some of those descriptors 11030 were blocking circuits from building. Fixes bug 23985; bugfix on 11031 0.1.1.11-alpha. The effects of this bug became worse in 11032 0.3.0.3-alpha, when we began treating missing descriptors from our 11033 primary guards as a reason to delay circuits. 11034 11035 o Major bugfixes (onion services, retry behavior): 11036 - Fix an "off by 2" error in counting rendezvous failures on the 11037 onion service side. While we thought we would stop the rendezvous 11038 attempt after one failed circuit, we were actually making three 11039 circuit attempts before giving up. Now switch to a default of 2, 11040 and allow the consensus parameter "hs_service_max_rdv_failures" to 11041 override. Fixes bug 24895; bugfix on 0.0.6. 11042 11043 o Minor feature (relay statistics): 11044 - Change relay bandwidth reporting stats interval from 4 hours to 24 11045 hours in order to reduce the efficiency of guard discovery 11046 attacks. Fixes ticket 23856. 11047 11048 o Minor features (compatibility, OpenSSL): 11049 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released. 11050 Previous versions of Tor would not have worked with OpenSSL 1.1.1, 11051 since they neither disabled TLS 1.3 nor enabled any of the 11052 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites. 11053 Closes ticket 24978. 11054 11055 o Minor features (denial-of-service avoidance): 11056 - Make our OOM handler aware of the geoip client history cache so it 11057 doesn't fill up the memory. This check is important for IPv6 and 11058 our DoS mitigation subsystem. Closes ticket 25122. 11059 11060 o Minor features (fallback directory mirrors): 11061 - The fallback directory list has been re-generated based on the 11062 current status of the network. Tor uses fallback directories to 11063 bootstrap when it doesn't yet have up-to-date directory 11064 information. Closes ticket 24801. 11065 - Make the default DirAuthorityFallbackRate 0.1, so that clients 11066 prefer to bootstrap from fallback directory mirrors. This is a 11067 follow-up to 24679, which removed weights from the default 11068 fallbacks. Implements ticket 24681. 11069 11070 o Minor features (geoip): 11071 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2 11072 Country database. 11073 11074 o Minor features (linux seccomp2 sandbox): 11075 - Update the sandbox rules so that they should now work correctly 11076 with Glibc 2.26. Closes ticket 24315. 11077 11078 o Minor bugfix (channel connection): 11079 - Use the actual observed address of an incoming relay connection, 11080 not the canonical address of the relay from its descriptor, when 11081 making decisions about how to handle the incoming connection. 11082 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera". 11083 11084 o Minor bugfix (directory authority): 11085 - Directory authorities, when refusing a descriptor from a rejected 11086 relay, now explicitly tell the relay (in its logs) to set a valid 11087 ContactInfo address and contact the bad-relays@ mailing list. 11088 Fixes bug 25170; bugfix on 0.2.9.1. 11089 11090 o Minor bugfixes (address selection): 11091 - When the fascist_firewall_choose_address_ functions don't find a 11092 reachable address, set the returned address to the null address 11093 and port. This is a precautionary measure, because some callers do 11094 not check the return value. Fixes bug 24736; bugfix 11095 on 0.2.8.2-alpha. 11096 11097 o Minor bugfixes (compilation): 11098 - Fix a signed/unsigned comparison warning introduced by our fix to 11099 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16. 11100 11101 o Minor bugfixes (control port, linux seccomp2 sandbox): 11102 - Avoid a crash when attempting to use the seccomp2 sandbox together 11103 with the OwningControllerProcess feature. Fixes bug 24198; bugfix 11104 on 0.2.5.1-alpha. 11105 11106 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha): 11107 - Fix a possible crash on malformed consensus. If a consensus had 11108 contained an unparseable protocol line, it could have made clients 11109 and relays crash with a null-pointer exception. To exploit this 11110 issue, however, an attacker would need to be able to subvert the 11111 directory authority system. Fixes bug 25251; bugfix on 11112 0.2.9.4-alpha. Also tracked as TROVE-2018-004. 11113 11114 o Minor bugfixes (memory usage): 11115 - When queuing DESTROY cells on a channel, only queue the circuit-id 11116 and reason fields: not the entire 514-byte cell. This fix should 11117 help mitigate any bugs or attacks that fill up these queues, and 11118 free more RAM for other uses. Fixes bug 24666; bugfix 11119 on 0.2.5.1-alpha. 11120 11121 o Minor bugfixes (network layer): 11122 - When closing a connection via close_connection_immediately(), we 11123 mark it as "not blocked on bandwidth", to prevent later calls from 11124 trying to unblock it, and give it permission to read. This fixes a 11125 backtrace warning that can happen on relays under various 11126 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc. 11127 11128 o Minor bugfixes (OSX): 11129 - Don't exit the Tor process if setrlimit() fails to change the file 11130 limit (which can happen sometimes on some versions of OSX). Fixes 11131 bug 21074; bugfix on 0.0.9pre5. 11132 11133 o Minor bugfixes (path selection): 11134 - When selecting relays by bandwidth, avoid a rounding error that 11135 could sometimes cause load to be imbalanced incorrectly. 11136 Previously, we would always round upwards; now, we round towards 11137 the nearest integer. This had the biggest effect when a relay's 11138 weight adjustments should have given it weight 0, but it got 11139 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha. 11140 - When calculating the fraction of nodes that have descriptors, and 11141 all nodes in the network have zero bandwidths, count the number of 11142 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha. 11143 - Actually log the total bandwidth in compute_weighted_bandwidths(). 11144 Fixes bug 24170; bugfix on 0.2.4.3-alpha. 11145 11146 o Minor bugfixes (portability, msvc): 11147 - Fix a bug in the bit-counting parts of our timing-wheel code on 11148 MSVC. (Note that MSVC is still not a supported build platform, due 11149 to cryptographic timing channel risks.) Fixes bug 24633; bugfix 11150 on 0.2.9.1-alpha. 11151 11152 o Minor bugfixes (relay): 11153 - Make the internal channel_is_client() function look at what sort 11154 of connection handshake the other side used, rather than whether 11155 the other side ever sent a create_fast cell to us. Backports part 11156 of the fixes from bugs 22805 and 24898. 11157 11158 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha): 11159 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on 11160 0.2.9.4-alpha. 11161 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249; 11162 bugfix on 0.2.9.4-alpha. 11163 11164 11165Changes in version 0.3.2.10 - 2018-03-03 11166 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It 11167 backports a number of bugfixes, including important fixes for security 11168 issues. 11169 11170 It includes an important security fix for a remote crash attack 11171 against directory authorities, tracked as TROVE-2018-001. 11172 11173 Additionally, it backports a fix for a bug whose severity we have 11174 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely 11175 triggered in order to crash relays with a use-after-free pattern. As 11176 such, we are now tracking that bug as TROVE-2018-002 and 11177 CVE-2018-0491, and backporting it to earlier releases. This bug 11178 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version 11179 0.3.3.1-alpha. 11180 11181 This release also backports our new system for improved resistance to 11182 denial-of-service attacks against relays. 11183 11184 This release also fixes several minor bugs and annoyances from 11185 earlier releases. 11186 11187 Relays running 0.3.2.x SHOULD upgrade to one of the versions released 11188 today, for the fix to TROVE-2018-002. Directory authorities should 11189 also upgrade. (Relays on earlier versions might want to update too for 11190 the DoS mitigations.) 11191 11192 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha): 11193 - Fix a protocol-list handling bug that could be used to remotely crash 11194 directory authorities with a null-pointer exception. Fixes bug 25074; 11195 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and 11196 CVE-2018-0490. 11197 11198 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha): 11199 - Avoid adding the same channel twice in the KIST scheduler pending 11200 list, which could lead to remote denial-of-service use-after-free 11201 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha. 11202 11203 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha): 11204 - Give relays some defenses against the recent network overload. We 11205 start with three defenses (default parameters in parentheses). 11206 First: if a single client address makes too many concurrent 11207 connections (>100), hang up on further connections. Second: if a 11208 single client address makes circuits too quickly (more than 3 per 11209 second, with an allowed burst of 90) while also having too many 11210 connections open (3), refuse new create cells for the next while 11211 (1-2 hours). Third: if a client asks to establish a rendezvous 11212 point to you directly, ignore the request. These defenses can be 11213 manually controlled by new torrc options, but relays will also 11214 take guidance from consensus parameters, so there's no need to 11215 configure anything manually. Implements ticket 24902. 11216 11217 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha): 11218 - Fix an "off by 2" error in counting rendezvous failures on the 11219 onion service side. While we thought we would stop the rendezvous 11220 attempt after one failed circuit, we were actually making three 11221 circuit attempts before giving up. Now switch to a default of 2, 11222 and allow the consensus parameter "hs_service_max_rdv_failures" to 11223 override. Fixes bug 24895; bugfix on 0.0.6. 11224 - New-style (v3) onion services now obey the "max rendezvous circuit 11225 attempts" logic. Previously they would make as many rendezvous 11226 circuit attempts as they could fit in the MAX_REND_TIMEOUT second 11227 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha. 11228 11229 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha): 11230 - Add Link protocol version 5 to the supported protocols list. Fixes 11231 bug 25070; bugfix on 0.3.1.1-alpha. 11232 11233 o Major bugfixes (relay, backport from 0.3.3.1-alpha): 11234 - Fix a set of false positives where relays would consider 11235 connections to other relays as being client-only connections (and 11236 thus e.g. deserving different link padding schemes) if those 11237 relays fell out of the consensus briefly. Now we look only at the 11238 initial handshake and whether the connection authenticated as a 11239 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha. 11240 11241 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha): 11242 - The scheduler subsystem was failing to promptly notice changes in 11243 consensus parameters, making it harder to switch schedulers 11244 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha. 11245 11246 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha): 11247 - Make our OOM handler aware of the geoip client history cache so it 11248 doesn't fill up the memory. This check is important for IPv6 and 11249 our DoS mitigation subsystem. Closes ticket 25122. 11250 11251 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha): 11252 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released. 11253 Previous versions of Tor would not have worked with OpenSSL 1.1.1, 11254 since they neither disabled TLS 1.3 nor enabled any of the 11255 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites. 11256 Closes ticket 24978. 11257 11258 o Minor features (geoip): 11259 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2 11260 Country database. 11261 11262 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha): 11263 - When logging a failure to create an onion service's descriptor, 11264 also log what the problem with the descriptor was. Diagnostic 11265 for ticket 24972. 11266 11267 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha): 11268 - Use the actual observed address of an incoming relay connection, 11269 not the canonical address of the relay from its descriptor, when 11270 making decisions about how to handle the incoming connection. 11271 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera". 11272 11273 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha): 11274 - Fix a possible crash on malformed consensus. If a consensus had 11275 contained an unparseable protocol line, it could have made clients 11276 and relays crash with a null-pointer exception. To exploit this 11277 issue, however, an attacker would need to be able to subvert the 11278 directory authority system. Fixes bug 25251; bugfix on 11279 0.2.9.4-alpha. Also tracked as TROVE-2018-004. 11280 11281 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha): 11282 - Directory authorities, when refusing a descriptor from a rejected 11283 relay, now explicitly tell the relay (in its logs) to set a valid 11284 ContactInfo address and contact the bad-relays@ mailing list. 11285 Fixes bug 25170; bugfix on 0.2.9.1. 11286 11287 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha): 11288 - When building with Rust on OSX, link against libresolv, to work 11289 around the issue at https://github.com/rust-lang/rust/issues/46797. 11290 Fixes bug 24652; bugfix on 0.3.1.1-alpha. 11291 11292 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha): 11293 - Remove a BUG() statement when a client fetches an onion descriptor 11294 that has a lower revision counter than the one in its cache. This 11295 can happen in normal circumstances due to HSDir desync. Fixes bug 11296 24976; bugfix on 0.3.2.1-alpha. 11297 11298 o Minor bugfixes (logging, backport from 0.3.3.2-alpha): 11299 - Don't treat inability to store a cached consensus object as a bug: 11300 it can happen normally when we are out of disk space. Fixes bug 11301 24859; bugfix on 0.3.1.1-alpha. 11302 11303 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha): 11304 - Improve the performance of our consensus-diff application code 11305 when Tor is built with the --enable-fragile-hardening option set. 11306 Fixes bug 24826; bugfix on 0.3.1.1-alpha. 11307 11308 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha): 11309 - Don't exit the Tor process if setrlimit() fails to change the file 11310 limit (which can happen sometimes on some versions of OSX). Fixes 11311 bug 21074; bugfix on 0.0.9pre5. 11312 11313 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha): 11314 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on 11315 0.2.9.4-alpha. 11316 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249; 11317 bugfix on 0.2.9.4-alpha. 11318 11319 o Minor bugfixes (testing, backport from 0.3.3.1-alpha): 11320 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug 11321 25005; bugfix on 0.3.2.7-rc. 11322 11323 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha): 11324 - Look at the "HSRend" protocol version, not the "HSDir" protocol 11325 version, when deciding whether a consensus entry can support the 11326 v3 onion service protocol as a rendezvous point. Fixes bug 25105; 11327 bugfix on 0.3.2.1-alpha. 11328 11329 o Code simplification and refactoring (backport from 0.3.3.3-alpha): 11330 - Update the "rust dependencies" submodule to be a project-level 11331 repository, rather than a user repository. Closes ticket 25323. 11332 11333 o Documentation (backport from 0.3.3.1-alpha) 11334 - Document that operators who run more than one relay or bridge are 11335 expected to set MyFamily and ContactInfo correctly. Closes 11336 ticket 24526. 11337 11338 11339Changes in version 0.3.3.3-alpha - 2018-03-03 11340 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series. 11341 It includes an important security fix for a remote crash attack 11342 against directory authorities tracked as TROVE-2018-001. 11343 11344 Additionally, with this release, we are upgrading the severity of a 11345 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in 11346 0.3.3.2-alpha, can be remotely triggered in order to crash relays with 11347 a use-after-free pattern. As such, we are now tracking that bug as 11348 TROVE-2018-002 and CVE-2018-0491. This bug affected versions 11349 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha. 11350 11351 This release also fixes several minor bugs and annoyances from 11352 earlier releases. 11353 11354 Relays running 0.3.2.x should upgrade to one of the versions released 11355 today, for the fix to TROVE-2018-002. Directory authorities should 11356 also upgrade. (Relays on earlier versions might want to update too for 11357 the DoS mitigations.) 11358 11359 o Major bugfixes (denial-of-service, directory authority): 11360 - Fix a protocol-list handling bug that could be used to remotely crash 11361 directory authorities with a null-pointer exception. Fixes bug 25074; 11362 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and 11363 CVE-2018-0490. 11364 11365 o Minor features (compatibility, OpenSSL): 11366 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released. 11367 Previous versions of Tor would not have worked with OpenSSL 1.1.1, 11368 since they neither disabled TLS 1.3 nor enabled any of the 11369 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites. 11370 Closes ticket 24978. 11371 11372 o Minor features (logging): 11373 - Clarify the log messages produced when getrandom() or a related 11374 entropy-generation mechanism gives an error. Closes ticket 25120. 11375 11376 o Minor features (testing): 11377 - Add a "make test-rust" target to run the rust tests only. Closes 11378 ticket 25071. 11379 11380 o Minor bugfixes (denial-of-service): 11381 - Fix a possible crash on malformed consensus. If a consensus had 11382 contained an unparseable protocol line, it could have made clients 11383 and relays crash with a null-pointer exception. To exploit this 11384 issue, however, an attacker would need to be able to subvert the 11385 directory authority system. Fixes bug 25251; bugfix on 11386 0.2.9.4-alpha. Also tracked as TROVE-2018-004. 11387 11388 o Minor bugfixes (DoS mitigation): 11389 - Add extra safety checks when refilling the circuit creation bucket 11390 to ensure we never set a value above the allowed maximum burst. 11391 Fixes bug 25202; bugfix on 0.3.3.2-alpha. 11392 - When a new consensus arrives, don't update our DoS-mitigation 11393 parameters if we aren't a public relay. Fixes bug 25223; bugfix 11394 on 0.3.3.2-alpha. 11395 11396 o Minor bugfixes (man page, SocksPort): 11397 - Remove dead code from the old "SocksSocket" option, and rename 11398 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option 11399 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3. 11400 11401 o Minor bugfixes (performance): 11402 - Reduce the number of circuits that will be opened at once during 11403 the circuit build timeout phase. This is done by increasing the 11404 idle timeout to 3 minutes, and lowering the maximum number of 11405 concurrent learning circuits to 10. Fixes bug 24769; bugfix 11406 on 0.3.1.1-alpha. 11407 11408 o Minor bugfixes (spec conformance): 11409 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on 11410 0.2.9.4-alpha. 11411 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249; 11412 bugfix on 0.2.9.4-alpha. 11413 11414 o Minor bugfixes (spec conformance, rust): 11415 - Resolve a denial-of-service issue caused by an infinite loop in 11416 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha. 11417 Also tracked as TROVE-2018-003. 11418 11419 o Code simplification and refactoring: 11420 - Update the "rust dependencies" submodule to be a project-level 11421 repository, rather than a user repository. Closes ticket 25323. 11422 11423 11424Changes in version 0.3.3.2-alpha - 2018-02-10 11425 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It 11426 introduces a mechanism to handle the high loads that many relay 11427 operators have been reporting recently. It also fixes several bugs in 11428 older releases. If this new code proves reliable, we plan to backport 11429 it to older supported release series. 11430 11431 o Major features (denial-of-service mitigation): 11432 - Give relays some defenses against the recent network overload. We 11433 start with three defenses (default parameters in parentheses). 11434 First: if a single client address makes too many concurrent 11435 connections (>100), hang up on further connections. Second: if a 11436 single client address makes circuits too quickly (more than 3 per 11437 second, with an allowed burst of 90) while also having too many 11438 connections open (3), refuse new create cells for the next while 11439 (1-2 hours). Third: if a client asks to establish a rendezvous 11440 point to you directly, ignore the request. These defenses can be 11441 manually controlled by new torrc options, but relays will also 11442 take guidance from consensus parameters, so there's no need to 11443 configure anything manually. Implements ticket 24902. 11444 11445 o Major bugfixes (netflow padding): 11446 - Stop adding unneeded channel padding right after we finish 11447 flushing to a connection that has been trying to flush for many 11448 seconds. Instead, treat all partial or complete flushes as 11449 activity on the channel, which will defer the time until we need 11450 to add padding. This fix should resolve confusing and scary log 11451 messages like "Channel padding timeout scheduled 221453ms in the 11452 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha. 11453 11454 o Major bugfixes (protocol versions): 11455 - Add Link protocol version 5 to the supported protocols list. Fixes 11456 bug 25070; bugfix on 0.3.1.1-alpha. 11457 11458 o Major bugfixes (scheduler, consensus): 11459 - The scheduler subsystem was failing to promptly notice changes in 11460 consensus parameters, making it harder to switch schedulers 11461 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha. 11462 11463 o Minor features (denial-of-service avoidance): 11464 - Make our OOM handler aware of the geoip client history cache so it 11465 doesn't fill up the memory. This check is important for IPv6 and 11466 our DoS mitigation subsystem. Closes ticket 25122. 11467 11468 o Minor features (directory authority): 11469 - When directory authorities are unable to add signatures to a 11470 pending consensus, log the reason why. Closes ticket 24849. 11471 11472 o Minor features (geoip): 11473 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2 11474 Country database. 11475 11476 o Minor features (logging, diagnostic): 11477 - When logging a failure to create an onion service's descriptor, 11478 also log what the problem with the descriptor was. Diagnostic for 11479 ticket 24972. 11480 11481 o Minor bugfix (channel connection): 11482 - Use the actual observed address of an incoming relay connection, 11483 not the canonical address of the relay from its descriptor, when 11484 making decisions about how to handle the incoming connection. 11485 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera". 11486 11487 o Minor bugfix (directory authority): 11488 - Directory authorities, when refusing a descriptor from a rejected 11489 relay, now explicitly tell the relay (in its logs) to set a valid 11490 ContactInfo address and contact the bad-relays@ mailing list. 11491 Fixes bug 25170; bugfix on 0.2.9.1. 11492 11493 o Minor bugfixes (all versions of Tor): 11494 - Use the "misspell" tool to detect and fix typos throughout the 11495 source code. Fixes bug 23650; bugfix on various versions of Tor. 11496 Patch from Deepesh Pathak. 11497 11498 o Minor bugfixes (circuit, cannibalization): 11499 - Don't cannibalize preemptively-built circuits if we no longer 11500 recognize their first hop. This situation can happen if our Guard 11501 relay went off the consensus after the circuit was created. Fixes 11502 bug 24469; bugfix on 0.0.6. 11503 11504 o Minor bugfixes (correctness): 11505 - Remove a nonworking, unnecessary check to see whether a circuit 11506 hop's identity digest was set when the circuit failed. Fixes bug 11507 24927; bugfix on 0.2.4.4-alpha. 11508 11509 o Minor bugfixes (logging): 11510 - Don't treat inability to store a cached consensus object as a bug: 11511 it can happen normally when we are out of disk space. Fixes bug 11512 24859; bugfix on 0.3.1.1-alpha. 11513 - Fix a (mostly harmless) race condition when invoking 11514 LOG_PROTOCOL_WARN message from a subthread while the torrc options 11515 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha. 11516 11517 o Minor bugfixes (onion services): 11518 - Remove a BUG() statement when a client fetches an onion descriptor 11519 that has a lower revision counter than the one in its cache. This 11520 can happen in normal circumstances due to HSDir desync. Fixes bug 11521 24976; bugfix on 0.3.2.1-alpha. 11522 - If we are configured to offer a single onion service, don't log 11523 long-term established one hop rendezvous points in the heartbeat. 11524 Fixes bug 25116; bugfix on 0.2.9.6-rc. 11525 11526 o Minor bugfixes (performance): 11527 - Avoid calling protocol_list_supports_protocol() from inside tight 11528 loops when running with cached routerinfo_t objects. Instead, 11529 summarize the relevant protocols as flags in the routerinfo_t, as 11530 we do for routerstatus_t objects. This change simplifies our code 11531 a little, and saves a large amount of short-term memory allocation 11532 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha. 11533 11534 o Minor bugfixes (Rust FFI): 11535 - Fix a minor memory leak which would happen whenever the C code 11536 would call the Rust implementation of 11537 protover_get_supported_protocols(). This was due to the C version 11538 returning a static string, whereas the Rust version newly allocated 11539 a CString to pass across the FFI boundary. Consequently, the C 11540 code was not expecting to need to free() what it was given. Fixes 11541 bug 25127; bugfix on 0.3.2.1-alpha. 11542 11543 o Minor bugfixes (scheduler, KIST): 11544 - Avoid adding the same channel twice in the KIST scheduler pending 11545 list, which would waste CPU cycles. Fixes bug 24700; bugfix 11546 on 0.3.2.1-alpha. 11547 11548 o Minor bugfixes (unit test, monotonic time): 11549 - Increase a constant (1msec to 10msec) in the monotonic time test 11550 that makes sure the nsec/usec/msec times read are synchronized. 11551 This change was needed to accommodate slow systems like armel or 11552 when the clock_gettime() is not a VDSO on the running kernel. 11553 Fixes bug 25113; bugfix on 0.2.9.1. 11554 11555 o Minor bugfixes (v3 onion services): 11556 - Look at the "HSRend" protocol version, not the "HSDir" protocol 11557 version, when deciding whether a consensus entry can support the 11558 v3 onion service protocol as a rendezvous point. Fixes bug 25105; 11559 bugfix on 0.3.2.1-alpha. 11560 11561 o Code simplification and refactoring: 11562 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes 11563 ticket 25108. 11564 - Remove a series of counters used to track circuit extend attempts 11565 and connection status but that in reality we aren't using for 11566 anything other than stats logged by a SIGUSR1 signal. Closes 11567 ticket 25163. 11568 11569 o Documentation (man page): 11570 - The HiddenServiceVersion torrc option accepts only one number: 11571 either version 2 or 3. Closes ticket 25026; bugfix 11572 on 0.3.2.2-alpha. 11573 11574 11575Changes in version 0.3.3.1-alpha - 2018-01-25 11576 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds 11577 several new features to Tor, including several improvements to 11578 bootstrapping, and support for an experimental "vanguards" feature to 11579 resist guard discovery attacks. This series also includes better 11580 support for applications that need to embed Tor or manage v3 11581 onion services. 11582 11583 o Major features (embedding): 11584 - There is now a documented stable API for programs that need to 11585 embed Tor. See tor_api.h for full documentation and known bugs. 11586 Closes ticket 23684. 11587 - Tor now has support for restarting in the same process. 11588 Controllers that run Tor using the "tor_api.h" interface can now 11589 restart Tor after Tor has exited. This support is incomplete, 11590 however: we fixed crash bugs that prevented it from working at 11591 all, but many bugs probably remain, including a possibility of 11592 security issues. Implements ticket 24581. 11593 11594 o Major features (IPv6, directory documents): 11595 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc 11596 consensus. This information makes it easier for IPv6 clients to 11597 bootstrap and choose reachable entry guards. Implements ticket 23826. 11598 - Add consensus method 28, which removes IPv6 ORPorts from 11599 microdescriptors. Now that the consensus contains IPv6 ORPorts, they 11600 are redundant in microdescs. This change will be used by Tor clients 11601 on 0.2.8.x and later. (That is to say, with all Tor clients that 11602 have IPv6 bootstrap and guard support.) Implements ticket 23828. 11603 - Expand the documentation for AuthDirHasIPv6Connectivity when it is 11604 set by different numbers of authorities. Fixes 23870 11605 on 0.2.4.1-alpha. 11606 11607 o Major features (onion service v3, control port): 11608 - The control port now supports commands and events for v3 onion 11609 services. It is now possible to create ephemeral v3 services using 11610 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT, 11611 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and 11612 DEL_ONION) have been extended to support v3 onion services. Closes 11613 ticket 20699; implements proposal 284. 11614 11615 o Major features (onion services): 11616 - Provide torrc options to pin the second and third hops of onion 11617 service circuits to a list of nodes. The option HSLayer2Guards 11618 pins the second hop, and the option HSLayer3Guards pins the third 11619 hop. These options are for use in conjunction with experiments 11620 with "vanguards" for preventing guard enumeration attacks. Closes 11621 ticket 13837. 11622 11623 o Major features (rust, portability, experimental): 11624 - Tor now ships with an optional implementation of one of its 11625 smaller modules (protover.c) in the Rust programming language. To 11626 try it out, install a Rust build environment, and configure Tor 11627 with "--enable-rust --enable-cargo-online-mode". This should not 11628 cause any user-visible changes, but should help us gain more 11629 experience with Rust, and plan future Rust integration work. 11630 Implementation by Chelsea Komlo. Closes ticket 22840. 11631 11632 o Minor features (storage, configuration): 11633 - Users can store cached directory documents somewhere other than 11634 the DataDirectory by using the CacheDirectory option. Similarly, 11635 the storage location for relay's keys can be overridden with the 11636 KeyDirectory option. Closes ticket 22703. 11637 11638 o Major features (v3 onion services, ipv6): 11639 - When v3 onion service clients send introduce cells, they now 11640 include the IPv6 address of the rendezvous point, if it has one. 11641 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but 11642 in future Tor versions, IPv6-only v3 single onion services will be 11643 able to use IPv6 addresses to connect directly to the rendezvous 11644 point. Closes ticket 23577. Patch by Neel Chauhan. 11645 11646 o Major bugfixes (onion services, retry behavior): 11647 - Fix an "off by 2" error in counting rendezvous failures on the 11648 onion service side. While we thought we would stop the rendezvous 11649 attempt after one failed circuit, we were actually making three 11650 circuit attempts before giving up. Now switch to a default of 2, 11651 and allow the consensus parameter "hs_service_max_rdv_failures" to 11652 override. Fixes bug 24895; bugfix on 0.0.6. 11653 - New-style (v3) onion services now obey the "max rendezvous circuit 11654 attempts" logic. Previously they would make as many rendezvous 11655 circuit attempts as they could fit in the MAX_REND_TIMEOUT second 11656 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha. 11657 11658 o Major bugfixes (relays): 11659 - Fix a set of false positives where relays would consider 11660 connections to other relays as being client-only connections (and 11661 thus e.g. deserving different link padding schemes) if those 11662 relays fell out of the consensus briefly. Now we look only at the 11663 initial handshake and whether the connection authenticated as a 11664 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha. 11665 11666 o Minor feature (IPv6): 11667 - Make IPv6-only clients wait for microdescs for relays, even if we 11668 were previously using descriptors (or were using them as a bridge) 11669 and have a cached descriptor for them. Implements ticket 23827. 11670 - When a consensus has IPv6 ORPorts, make IPv6-only clients use 11671 them, rather than waiting to download microdescriptors. 11672 Implements ticket 23827. 11673 11674 o Minor features (cleanup): 11675 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile 11676 when it stops. Closes ticket 23271. 11677 11678 o Minor features (defensive programming): 11679 - Most of the functions in Tor that free objects have been replaced 11680 with macros that free the objects and set the corresponding 11681 pointers to NULL. This change should help prevent a large class of 11682 dangling pointer bugs. Closes ticket 24337. 11683 - Where possible, the tor_free() macro now only evaluates its input 11684 once. Part of ticket 24337. 11685 - Check that microdesc ed25519 ids are non-zero in 11686 node_get_ed25519_id() before returning them. Implements ticket 11687 24001, patch by "aruna1234". 11688 11689 o Minor features (embedding): 11690 - Tor can now start with a preauthenticated control connection 11691 created by the process that launched it. This feature is meant for 11692 use by programs that want to launch and manage a Tor process 11693 without allowing other programs to manage it as well. For more 11694 information, see the __OwningControllerFD option documented in 11695 control-spec.txt. Closes ticket 23900. 11696 - On most errors that would cause Tor to exit, it now tries to 11697 return from the tor_main() function, rather than calling the 11698 system exit() function. Most users won't notice a difference here, 11699 but it should be significant for programs that run Tor inside 11700 a separate thread: they should now be able to survive Tor's exit 11701 conditions rather than having Tor shut down the entire process. 11702 Closes ticket 23848. 11703 - Applications that want to embed Tor can now tell Tor not to 11704 register any of its own POSIX signal handlers, using the 11705 __DisableSignalHandlers option. Closes ticket 24588. 11706 11707 o Minor features (fallback directory list): 11708 - Avoid selecting fallbacks that change their IP addresses too 11709 often. Select more fallbacks by ignoring the Guard flag, and 11710 allowing lower cutoffs for the Running and V2Dir flags. Also allow 11711 a lower bandwidth, and a higher number of fallbacks per operator 11712 (5% of the list). Implements ticket 24785. 11713 - Update the fallback whitelist and blacklist based on opt-ins and 11714 relay changes. Closes tickets 22321, 24678, 22527, 24135, 11715 and 24695. 11716 11717 o Minor features (fallback directory mirror configuration): 11718 - Add a nickname to each fallback in a C comment. This makes it 11719 easier for operators to find their relays, and allows stem to use 11720 nicknames to identify fallbacks. Implements ticket 24600. 11721 - Add a type and version header to the fallback directory mirror 11722 file. Also add a delimiter to the end of each fallback entry. This 11723 helps external parsers like stem and Relay Search. Implements 11724 ticket 24725. 11725 - Add an extrainfo cache flag for each fallback in a C comment. This 11726 allows stem to use fallbacks to fetch extra-info documents, rather 11727 than using authorities. Implements ticket 22759. 11728 - Add the generateFallbackDirLine.py script for automatically 11729 generating fallback directory mirror lines from relay fingerprints. 11730 No more typos! Add the lookupFallbackDirContact.py script for 11731 automatically looking up operator contact info from relay 11732 fingerprints. Implements ticket 24706, patch by teor and atagar. 11733 - Reject any fallback directory mirror that serves an expired 11734 consensus. Implements ticket 20942, patch by "minik". 11735 - Remove commas and equals signs from external string inputs to the 11736 fallback list. This avoids format confusion attacks. Implements 11737 ticket 24726. 11738 - Remove the "weight=10" line from fallback directory mirror 11739 entries. Ticket 24681 will maintain the current fallback weights 11740 by changing Tor's default fallback weight to 10. Implements 11741 ticket 24679. 11742 - Stop logging excessive information about fallback netblocks. 11743 Implements ticket 24791. 11744 11745 o Minor features (forward-compatibility): 11746 - If a relay supports some link authentication protocol that we do 11747 not recognize, then include that relay's ed25519 key when telling 11748 other relays to extend to it. Previously, we treated future 11749 versions as if they were too old to support ed25519 link 11750 authentication. Closes ticket 20895. 11751 11752 o Minor features (heartbeat): 11753 - Add onion service information to our heartbeat logs, displaying 11754 stats about the activity of configured onion services. Closes 11755 ticket 24896. 11756 11757 o Minor features (instrumentation, development): 11758 - Add the MainloopStats option to allow developers to get 11759 instrumentation information from the main event loop via the 11760 heartbeat messages. We hope to use this to improve Tor's behavior 11761 when it's trying to sleep. Closes ticket 24605. 11762 11763 o Minor features (log messages): 11764 - Improve a warning message that happens when we fail to re-parse an 11765 old router because of an expired certificate. Closes ticket 20020. 11766 - Make the log more quantitative when we hit MaxMemInQueues 11767 threshold exposing some values. Closes ticket 24501. 11768 11769 o Minor features (logging, android): 11770 - Added support for the Android logging subsystem. Closes 11771 ticket 24362. 11772 11773 o Minor features (performance): 11774 - Support predictive circuit building for onion service circuits 11775 with multiple layers of guards. Closes ticket 23101. 11776 - Use stdatomic.h where available, rather than mutexes, to implement 11777 atomic_counter_t. Closes ticket 23953. 11778 11779 o Minor features (performance, 32-bit): 11780 - Improve performance on 32-bit systems by avoiding 64-bit division 11781 when calculating the timestamp in milliseconds for channel padding 11782 computations. Implements ticket 24613. 11783 - Improve performance on 32-bit systems by avoiding 64-bit division 11784 when timestamping cells and buffer chunks for OOM calculations. 11785 Implements ticket 24374. 11786 11787 o Minor features (performance, OSX, iOS): 11788 - Use the mach_approximate_time() function (when available) to 11789 implement coarse monotonic time. Having a coarse time function 11790 should avoid a large number of system calls, and improve 11791 performance slightly, especially under load. Closes ticket 24427. 11792 11793 o Minor features (performance, windows): 11794 - Improve performance on Windows Vista and Windows 7 by adjusting 11795 TCP send window size according to the recommendation from 11796 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch 11797 from Vort. 11798 11799 o Major features (relay): 11800 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay 11801 operator to use a more reasonable ("reduced") exit policy, rather 11802 than the default one. If you want to run an exit node without 11803 thinking too hard about which ports to allow, this one is for you. 11804 Closes ticket 13605. Patch from Neel Chauhan. 11805 11806 o Minor features (testing, debugging, embedding): 11807 - For development purposes, Tor now has a mode in which it runs for 11808 a few seconds, then stops, and starts again without exiting the 11809 process. This mode is meant to help us debug various issues with 11810 ticket 23847. To use this feature, compile with 11811 --enable-restart-debugging, and set the TOR_DEBUG_RESTART 11812 environment variable. This is expected to crash a lot, and is 11813 really meant for developers only. It will likely be removed in a 11814 future release. Implements ticket 24583. 11815 11816 o Minor bugfix (network IPv6 test): 11817 - Tor's test scripts now check if "ping -6 ::1" works when the user 11818 runs "make test-network-all". Fixes bug 24677; bugfix on 11819 0.2.9.3-alpha. Patch by "ffmancera". 11820 11821 o Minor bugfixes (build, rust): 11822 - Fix output of autoconf checks to display success messages for Rust 11823 dependencies and a suitable rustc compiler version. Fixes bug 11824 24612; bugfix on 0.3.1.3-alpha. 11825 - When building with Rust on OSX, link against libresolv, to work 11826 around the issue at https://github.com/rust-lang/rust/issues/46797. 11827 Fixes bug 24652; bugfix on 0.3.1.1-alpha. 11828 - Don't pass the --quiet option to cargo: it seems to suppress some 11829 errors, which is not what we want to do when building. Fixes bug 11830 24518; bugfix on 0.3.1.7. 11831 - Build correctly when building from outside Tor's source tree with 11832 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix 11833 on 0.3.1.7. 11834 11835 o Minor bugfixes (directory authorities, IPv6): 11836 - When creating a routerstatus (vote) from a routerinfo (descriptor), 11837 set the IPv6 address to the unspecified IPv6 address, and 11838 explicitly initialize the port to zero. Fixes bug 24488; bugfix 11839 on 0.2.4.1-alpha. 11840 11841 o Minor bugfixes (fallback directory mirrors): 11842 - Make updateFallbackDirs.py search harder for python. (Some OSs 11843 don't put it in /usr/bin.) Fixes bug 24708; bugfix 11844 on 0.2.8.1-alpha. 11845 11846 o Minor bugfixes (hibernation, bandwidth accounting, shutdown): 11847 - When hibernating, close connections normally and allow them to 11848 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes 11849 bug 7267. 11850 - Do not attempt to launch self-reachability tests when entering 11851 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5. 11852 - Resolve several bugs related to descriptor fetching on bridge 11853 clients with bandwidth accounting enabled. (This combination is 11854 not recommended!) Fixes a case of bug 12062; bugfix 11855 on 0.2.0.3-alpha. 11856 - When hibernating, do not attempt to launch DNS checks. Fixes a 11857 case of bug 12062; bugfix on 0.1.2.2-alpha. 11858 - When hibernating, do not try to upload or download descriptors. 11859 Fixes a case of bug 12062; bugfix on 0.0.9pre5. 11860 11861 o Minor bugfixes (IPv6, bridges): 11862 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573; 11863 bugfix on 0.2.8.2-alpha. 11864 - Tor now sets IPv6 address in the routerstatus as well as in the 11865 router descriptors when updating addresses for a bridge. Closes 11866 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera". 11867 11868 o Minor bugfixes (linux seccomp2 sandbox): 11869 - When running with the sandbox enabled, reload configuration files 11870 correctly even when %include was used. Previously we would crash. 11871 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto. 11872 11873 o Minor bugfixes (memory leaks): 11874 - Avoid possible at-exit memory leaks related to use of Libevent's 11875 event_base_once() function. (This function tends to leak memory if 11876 the event_base is closed before the event fires.) Fixes bug 24584; 11877 bugfix on 0.2.8.1-alpha. 11878 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix 11879 on 0.2.1.1-alpha. 11880 11881 o Minor bugfixes (OSX): 11882 - Don't exit the Tor process if setrlimit() fails to change the file 11883 limit (which can happen sometimes on some versions of OSX). Fixes 11884 bug 21074; bugfix on 0.0.9pre5. 11885 11886 o Minor bugfixes (performance, fragile-hardening): 11887 - Improve the performance of our consensus-diff application code 11888 when Tor is built with the --enable-fragile-hardening option set. 11889 Fixes bug 24826; bugfix on 0.3.1.1-alpha. 11890 11891 o Minor bugfixes (performance, timeouts): 11892 - Consider circuits for timeout as soon as they complete a hop. This 11893 is more accurate than applying the timeout in 11894 circuit_expire_building() because that function is only called 11895 once per second, which is now too slow for typical timeouts on the 11896 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha. 11897 - Use onion service circuits (and other circuits longer than 3 hops) 11898 to calculate a circuit build timeout. Previously, Tor only 11899 calculated its build timeout based on circuits that planned to be 11900 exactly 3 hops long. With this change, we include measurements 11901 from all circuits at the point where they complete their third 11902 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha. 11903 11904 o Minor bugfixes (testing): 11905 - Give out Exit flags in bootstrapping networks. Fixes bug 24137; 11906 bugfix on 0.2.3.1-alpha. 11907 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug 11908 25005; bugfix on 0.3.2.7-rc. 11909 11910 o Code simplification and refactoring: 11911 - Remove /usr/athena from search path in configure.ac. Closes 11912 ticket 24363. 11913 - Remove duplicate code in node_has_curve25519_onion_key() and 11914 node_get_curve25519_onion_key(), and add a check for a zero 11915 microdesc curve25519 onion key. Closes ticket 23966, patch by 11916 "aruna1234" and teor. 11917 - Rewrite channel_rsa_id_group_set_badness to reduce temporary 11918 memory allocations with large numbers of OR connections (e.g. 11919 relays). Closes ticket 24119. 11920 - Separate the function that deletes ephemeral files when Tor 11921 stops gracefully. 11922 - Small changes to Tor's buf_t API to make it suitable for use as a 11923 general-purpose safe string constructor. Closes ticket 22342. 11924 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to 11925 avoid source code identifier confusion. Closes ticket 24467. 11926 - The tor_git_revision[] constant no longer needs to be redeclared 11927 by everything that links against the rest of Tor. Done as part of 11928 ticket 23845, to simplify our external API. 11929 - We make extend_info_from_node() use node_get_curve25519_onion_key() 11930 introduced in ticket 23577 to access the curve25519 public keys 11931 rather than accessing it directly. Closes ticket 23760. Patch by 11932 Neel Chauhan. 11933 - Add a function to log channels' scheduler state changes to aid 11934 debugging efforts. Closes ticket 24531. 11935 11936 o Documentation: 11937 - Add documentation on how to build tor with Rust dependencies 11938 without having to be online. Closes ticket 22907; bugfix 11939 on 0.3.0.3-alpha. 11940 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client 11941 traffic. Closes ticket 24318. 11942 - Document that OutboundBindAddress doesn't apply to DNS requests. 11943 Closes ticket 22145. Patch from Aruna Maurya. 11944 - Document that operators who run more than one relay or bridge are 11945 expected to set MyFamily and ContactInfo correctly. Closes 11946 ticket 24526. 11947 11948 o Code simplification and refactoring (channels): 11949 - Remove the incoming and outgoing channel queues. These were never 11950 used, but still took up a step in our fast path. 11951 - The majority of the channel unit tests have been rewritten and the 11952 code coverage has now been raised to 83.6% for channel.c. Closes 11953 ticket 23709. 11954 - Remove other dead code from the channel subsystem: All together, 11955 this cleanup has removed more than 1500 lines of code overall and 11956 adding very little except for unit test. 11957 11958 o Code simplification and refactoring (circuit rendezvous): 11959 - Split the client-side rendezvous circuit lookup into two 11960 functions: one that returns only established circuits and another 11961 that returns all kinds of circuits. Closes ticket 23459. 11962 11963 o Code simplification and refactoring (controller): 11964 - Make most of the variables in networkstatus_getinfo_by_purpose() 11965 const. Implements ticket 24489. 11966 11967 11968Changes in version 0.3.2.9 - 2018-01-09 11969 Tor 0.3.2.9 is the first stable release in the 0.3.2 series. 11970 11971 The 0.3.2 series includes our long-anticipated new onion service 11972 design, with numerous security features. (For more information, see 11973 our blog post at https://blog.torproject.org/fall-harvest.) We also 11974 have a new circuit scheduler algorithm for improved performance on 11975 relays everywhere (see https://blog.torproject.org/kist-and-tell), 11976 along with many smaller features and bugfixes. 11977 11978 Per our stable release policy, we plan to support each stable release 11979 series for at least the next nine months, or for three months after 11980 the first stable release of the next series: whichever is longer. If 11981 you need a release with long-term support, we recommend that you stay 11982 with the 0.2.9 series. 11983 11984 Below is a list of the changes since 0.3.2.8-rc. For a list of all 11985 changes since 0.3.1, see the ReleaseNotes file. 11986 11987 o Minor features (fallback directory mirrors): 11988 - The fallback directory list has been re-generated based on the 11989 current status of the network. Tor uses fallback directories to 11990 bootstrap when it doesn't yet have up-to-date directory 11991 information. Closes ticket 24801. 11992 - Make the default DirAuthorityFallbackRate 0.1, so that clients 11993 prefer to bootstrap from fallback directory mirrors. This is a 11994 follow-up to 24679, which removed weights from the default 11995 fallbacks. Implements ticket 24681. 11996 11997 o Minor features (geoip): 11998 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2 11999 Country database. 12000 12001 o Minor bugfixes (address selection): 12002 - When the fascist_firewall_choose_address_ functions don't find a 12003 reachable address, set the returned address to the null address 12004 and port. This is a precautionary measure, because some callers do 12005 not check the return value. Fixes bug 24736; bugfix 12006 on 0.2.8.2-alpha. 12007 12008 o Minor bugfixes (compilation): 12009 - Resolve a few shadowed-variable warnings in the onion service 12010 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha. 12011 12012 o Minor bugfixes (portability, msvc): 12013 - Fix a bug in the bit-counting parts of our timing-wheel code on 12014 MSVC. (Note that MSVC is still not a supported build platform, due 12015 to cryptographic timing channel risks.) Fixes bug 24633; bugfix 12016 on 0.2.9.1-alpha. 12017 12018 12019Changes in version 0.3.2.8-rc - 2017-12-21 12020 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite 12021 schedulers that had led servers under heavy load to overload their 12022 outgoing connections. All relay operators running earlier 0.3.2.x 12023 versions should upgrade. This version also includes a mitigation for 12024 over-full DESTROY queues leading to out-of-memory conditions: if it 12025 works, we will soon backport it to earlier release series. 12026 12027 This is the second release candidate in the 0.3.2 series. If we find 12028 no new bugs or regression here, then the first stable 0.3.2 release 12029 will be nearly identical to this. 12030 12031 o Major bugfixes (KIST, scheduler): 12032 - The KIST scheduler did not correctly account for data already 12033 enqueued in each connection's send socket buffer, particularly in 12034 cases when the TCP/IP congestion window was reduced between 12035 scheduler calls. This situation lead to excessive per-connection 12036 buffering in the kernel, and a potential memory DoS. Fixes bug 12037 24665; bugfix on 0.3.2.1-alpha. 12038 12039 o Minor features (geoip): 12040 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2 12041 Country database. 12042 12043 o Minor bugfixes (hidden service v3): 12044 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase 12045 the probability of reaching a service for a client missing 12046 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha. 12047 12048 o Minor bugfixes (memory usage): 12049 - When queuing DESTROY cells on a channel, only queue the circuit-id 12050 and reason fields: not the entire 514-byte cell. This fix should 12051 help mitigate any bugs or attacks that fill up these queues, and 12052 free more RAM for other uses. Fixes bug 24666; bugfix 12053 on 0.2.5.1-alpha. 12054 12055 o Minor bugfixes (scheduler, KIST): 12056 - Use a sane write limit for KISTLite when writing onto a connection 12057 buffer instead of using INT_MAX and shoving as much as it can. 12058 Because the OOM handler cleans up circuit queues, we are better 12059 off at keeping them in that queue instead of the connection's 12060 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha. 12061 12062 12063Changes in version 0.3.2.7-rc - 2017-12-14 12064 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor, 12065 including some that could affect reliability or correctness. 12066 12067 This is the first release candidate in the 0.3.2 series. If we find no 12068 new bugs or regression here, then the first stable 0.3.2. release will 12069 be nearly identical to this. 12070 12071 o Major bugfixes (circuit prediction): 12072 - Fix circuit prediction logic so that a client doesn't treat a port 12073 as being "handled" by a circuit if that circuit already has 12074 isolation settings on it. This change should make Tor clients more 12075 responsive by improving their chances of having a pre-created 12076 circuit ready for use when a request arrives. Fixes bug 18859; 12077 bugfix on 0.2.3.3-alpha. 12078 12079 o Minor features (logging): 12080 - Provide better warnings when the getrandom() syscall fails. Closes 12081 ticket 24500. 12082 12083 o Minor features (portability): 12084 - Tor now compiles correctly on arm64 with libseccomp-dev installed. 12085 (It doesn't yet work with the sandbox enabled.) Closes 12086 ticket 24424. 12087 12088 o Minor bugfixes (bridge clients, bootstrap): 12089 - Retry directory downloads when we get our first bridge descriptor 12090 during bootstrap or while reconnecting to the network. Keep 12091 retrying every time we get a bridge descriptor, until we have a 12092 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha. 12093 - Stop delaying bridge descriptor fetches when we have cached bridge 12094 descriptors. Instead, only delay bridge descriptor fetches when we 12095 have at least one reachable bridge. Fixes part of bug 24367; 12096 bugfix on 0.2.0.3-alpha. 12097 - Stop delaying directory fetches when we have cached bridge 12098 descriptors. Instead, only delay bridge descriptor fetches when 12099 all our bridges are definitely unreachable. Fixes part of bug 12100 24367; bugfix on 0.2.0.3-alpha. 12101 12102 o Minor bugfixes (compilation): 12103 - Fix a signed/unsigned comparison warning introduced by our fix to 12104 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16. 12105 12106 o Minor bugfixes (correctness): 12107 - Fix several places in our codebase where a C compiler would be 12108 likely to eliminate a check, based on assuming that undefined 12109 behavior had not happened elsewhere in the code. These cases are 12110 usually a sign of redundant checking or dubious arithmetic. Found 12111 by Georg Koppen using the "STACK" tool from Wang, Zeldovich, 12112 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various 12113 Tor versions. 12114 12115 o Minor bugfixes (onion service v3): 12116 - Fix a race where an onion service would launch a new intro circuit 12117 after closing an old one, but fail to register it before freeing 12118 the previously closed circuit. This bug was making the service 12119 unable to find the established intro circuit and thus not upload 12120 its descriptor, thus making a service unavailable for up to 24 12121 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha. 12122 12123 o Minor bugfixes (scheduler, KIST): 12124 - Properly set the scheduler state of an unopened channel in the 12125 KIST scheduler main loop. This prevents a harmless but annoying 12126 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha. 12127 - Avoid a possible integer overflow when computing the available 12128 space on the TCP buffer of a channel. This had no security 12129 implications; but could make KIST allow too many cells on a 12130 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha. 12131 - Downgrade to "info" a harmless warning about the monotonic time 12132 moving backwards: This can happen on platform not supporting 12133 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha. 12134 12135 12136Changes in version 0.3.2.6-alpha - 2017-12-01 12137 This version of Tor is the latest in the 0.3.2 alpha series. It 12138 includes fixes for several important security issues. All Tor users 12139 should upgrade to this release, or to one of the other releases coming 12140 out today. 12141 12142 o Major bugfixes (security): 12143 - Fix a denial of service bug where an attacker could use a 12144 malformed directory object to cause a Tor instance to pause while 12145 OpenSSL would try to read a passphrase from the terminal. (Tor 12146 instances run without a terminal, which is the case for most Tor 12147 packages, are not impacted.) Fixes bug 24246; bugfix on every 12148 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12149 Found by OSS-Fuzz as testcase 6360145429790720. 12150 - Fix a denial of service issue where an attacker could crash a 12151 directory authority using a malformed router descriptor. Fixes bug 12152 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010 12153 and CVE-2017-8820. 12154 - When checking for replays in the INTRODUCE1 cell data for a 12155 (legacy) onion service, correctly detect replays in the RSA- 12156 encrypted part of the cell. We were previously checking for 12157 replays on the entire cell, but those can be circumvented due to 12158 the malleability of Tor's legacy hybrid encryption. This fix helps 12159 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12160 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12161 and CVE-2017-8819. 12162 12163 o Major bugfixes (security, onion service v2): 12164 - Fix a use-after-free error that could crash v2 Tor onion services 12165 when they failed to open circuits while expiring introduction 12166 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is 12167 also tracked as TROVE-2017-013 and CVE-2017-8823. 12168 12169 o Major bugfixes (security, relay): 12170 - When running as a relay, make sure that we never build a path 12171 through ourselves, even in the case where we have somehow lost the 12172 version of our descriptor appearing in the consensus. Fixes part 12173 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked 12174 as TROVE-2017-012 and CVE-2017-8822. 12175 - When running as a relay, make sure that we never choose ourselves 12176 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This 12177 issue is also tracked as TROVE-2017-012 and CVE-2017-8822. 12178 12179 o Minor feature (relay statistics): 12180 - Change relay bandwidth reporting stats interval from 4 hours to 24 12181 hours in order to reduce the efficiency of guard discovery 12182 attacks. Fixes ticket 23856. 12183 12184 o Minor features (directory authority): 12185 - Add an IPv6 address for the "bastet" directory authority. Closes 12186 ticket 24394. 12187 12188 o Minor bugfixes (client): 12189 - By default, do not enable storage of client-side DNS values. These 12190 values were unused by default previously, but they should not have 12191 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha. 12192 12193 12194Changes in version 0.3.1.9 - 2017-12-01: 12195 Tor 0.3.1.9 backports important security and stability fixes from the 12196 0.3.2 development series. All Tor users should upgrade to this 12197 release, or to another of the releases coming out today. 12198 12199 o Major bugfixes (security, backport from 0.3.2.6-alpha): 12200 - Fix a denial of service bug where an attacker could use a 12201 malformed directory object to cause a Tor instance to pause while 12202 OpenSSL would try to read a passphrase from the terminal. (Tor 12203 instances run without a terminal, which is the case for most Tor 12204 packages, are not impacted.) Fixes bug 24246; bugfix on every 12205 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12206 Found by OSS-Fuzz as testcase 6360145429790720. 12207 - Fix a denial of service issue where an attacker could crash a 12208 directory authority using a malformed router descriptor. Fixes bug 12209 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010 12210 and CVE-2017-8820. 12211 - When checking for replays in the INTRODUCE1 cell data for a 12212 (legacy) onion service, correctly detect replays in the RSA- 12213 encrypted part of the cell. We were previously checking for 12214 replays on the entire cell, but those can be circumvented due to 12215 the malleability of Tor's legacy hybrid encryption. This fix helps 12216 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12217 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12218 and CVE-2017-8819. 12219 12220 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha): 12221 - Fix a use-after-free error that could crash v2 Tor onion services 12222 when they failed to open circuits while expiring introduction 12223 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is 12224 also tracked as TROVE-2017-013 and CVE-2017-8823. 12225 12226 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): 12227 - When running as a relay, make sure that we never build a path 12228 through ourselves, even in the case where we have somehow lost the 12229 version of our descriptor appearing in the consensus. Fixes part 12230 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked 12231 as TROVE-2017-012 and CVE-2017-8822. 12232 - When running as a relay, make sure that we never choose ourselves 12233 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This 12234 issue is also tracked as TROVE-2017-012 and CVE-2017-8822. 12235 12236 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha): 12237 - Fix an issue causing DNS to fail on high-bandwidth exit nodes, 12238 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on 12239 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for 12240 identifying and finding a workaround to this bug and to Moritz, 12241 Arthur Edelstein, and Roger for helping to track it down and 12242 analyze it. 12243 12244 o Minor features (bridge): 12245 - Bridges now include notice in their descriptors that they are 12246 bridges, and notice of their distribution status, based on their 12247 publication settings. Implements ticket 18329. For more fine- 12248 grained control of how a bridge is distributed, upgrade to 0.3.2.x 12249 or later. 12250 12251 o Minor features (directory authority, backport from 0.3.2.6-alpha): 12252 - Add an IPv6 address for the "bastet" directory authority. Closes 12253 ticket 24394. 12254 12255 o Minor features (geoip): 12256 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12257 Country database. 12258 12259 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha): 12260 - Avoid unnecessary calls to directory_fetches_from_authorities() on 12261 relays, to prevent spurious address resolutions and descriptor 12262 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470; 12263 bugfix on in 0.2.8.1-alpha. 12264 12265 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha): 12266 - Fix unused variable warnings in donna's Curve25519 SSE2 code. 12267 Fixes bug 22895; bugfix on 0.2.7.2-alpha. 12268 12269 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha): 12270 - When a circuit is marked for close, do not attempt to package any 12271 cells for channels on that circuit. Previously, we would detect 12272 this condition lower in the call stack, when we noticed that the 12273 circuit had no attached channel, and log an annoying message. 12274 Fixes bug 8185; bugfix on 0.2.5.4-alpha. 12275 12276 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha): 12277 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval" 12278 so it matches dir-spec.txt. Fixes bug 24262; bugfix 12279 on 0.3.1.1-alpha. 12280 12281 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha): 12282 - Avoid a crash when transitioning from client mode to bridge mode. 12283 Previously, we would launch the worker threads whenever our 12284 "public server" mode changed, but not when our "server" mode 12285 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha. 12286 12287 12288Changes in version 0.3.0.13 - 2017-12-01 12289 Tor 0.3.0.13 backports important security and stability bugfixes from 12290 later Tor releases. All Tor users should upgrade to this release, or 12291 to another of the releases coming out today. 12292 12293 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan 12294 2018. If you need a release with long-term support, please stick with 12295 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 12296 12297 o Major bugfixes (security, backport from 0.3.2.6-alpha): 12298 - Fix a denial of service bug where an attacker could use a 12299 malformed directory object to cause a Tor instance to pause while 12300 OpenSSL would try to read a passphrase from the terminal. (Tor 12301 instances run without a terminal, which is the case for most Tor 12302 packages, are not impacted.) Fixes bug 24246; bugfix on every 12303 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12304 Found by OSS-Fuzz as testcase 6360145429790720. 12305 - Fix a denial of service issue where an attacker could crash a 12306 directory authority using a malformed router descriptor. Fixes bug 12307 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010 12308 and CVE-2017-8820. 12309 - When checking for replays in the INTRODUCE1 cell data for a 12310 (legacy) onion service, correctly detect replays in the RSA- 12311 encrypted part of the cell. We were previously checking for 12312 replays on the entire cell, but those can be circumvented due to 12313 the malleability of Tor's legacy hybrid encryption. This fix helps 12314 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12315 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12316 and CVE-2017-8819. 12317 12318 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha): 12319 - Fix a use-after-free error that could crash v2 Tor onion services 12320 when they failed to open circuits while expiring introduction 12321 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is 12322 also tracked as TROVE-2017-013 and CVE-2017-8823. 12323 12324 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): 12325 - When running as a relay, make sure that we never build a path 12326 through ourselves, even in the case where we have somehow lost the 12327 version of our descriptor appearing in the consensus. Fixes part 12328 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked 12329 as TROVE-2017-012 and CVE-2017-8822. 12330 - When running as a relay, make sure that we never choose ourselves 12331 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This 12332 issue is also tracked as TROVE-2017-012 and CVE-2017-8822. 12333 12334 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha): 12335 - Fix an issue causing DNS to fail on high-bandwidth exit nodes, 12336 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on 12337 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for 12338 identifying and finding a workaround to this bug and to Moritz, 12339 Arthur Edelstein, and Roger for helping to track it down and 12340 analyze it. 12341 12342 o Minor features (security, windows, backport from 0.3.1.1-alpha): 12343 - Enable a couple of pieces of Windows hardening: one 12344 (HeapEnableTerminationOnCorruption) that has been on-by-default 12345 since Windows 8, and unavailable before Windows 7; and one 12346 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't 12347 affect us, but shouldn't do any harm. Closes ticket 21953. 12348 12349 o Minor features (bridge, backport from 0.3.1.9): 12350 - Bridges now include notice in their descriptors that they are 12351 bridges, and notice of their distribution status, based on their 12352 publication settings. Implements ticket 18329. For more fine- 12353 grained control of how a bridge is distributed, upgrade to 0.3.2.x 12354 or later. 12355 12356 o Minor features (directory authority, backport from 0.3.2.6-alpha): 12357 - Add an IPv6 address for the "bastet" directory authority. Closes 12358 ticket 24394. 12359 12360 o Minor features (geoip): 12361 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12362 Country database. 12363 12364 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha): 12365 - Avoid unnecessary calls to directory_fetches_from_authorities() on 12366 relays, to prevent spurious address resolutions and descriptor 12367 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470; 12368 bugfix on in 0.2.8.1-alpha. 12369 12370 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha): 12371 - Fix unused variable warnings in donna's Curve25519 SSE2 code. 12372 Fixes bug 22895; bugfix on 0.2.7.2-alpha. 12373 12374 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha): 12375 - When a circuit is marked for close, do not attempt to package any 12376 cells for channels on that circuit. Previously, we would detect 12377 this condition lower in the call stack, when we noticed that the 12378 circuit had no attached channel, and log an annoying message. 12379 Fixes bug 8185; bugfix on 0.2.5.4-alpha. 12380 12381 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha): 12382 - Avoid a crash when transitioning from client mode to bridge mode. 12383 Previously, we would launch the worker threads whenever our 12384 "public server" mode changed, but not when our "server" mode 12385 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha. 12386 12387 o Minor bugfixes (testing, backport from 0.3.1.6-rc): 12388 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; 12389 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. 12390 12391 12392Changes in version 0.2.9.14 - 2017-12-01 12393 Tor 0.3.0.13 backports important security and stability bugfixes from 12394 later Tor releases. All Tor users should upgrade to this release, or 12395 to another of the releases coming out today. 12396 12397 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha): 12398 - Fix an issue causing DNS to fail on high-bandwidth exit nodes, 12399 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on 12400 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for 12401 identifying and finding a workaround to this bug and to Moritz, 12402 Arthur Edelstein, and Roger for helping to track it down and 12403 analyze it. 12404 12405 o Major bugfixes (security, backport from 0.3.2.6-alpha): 12406 - Fix a denial of service bug where an attacker could use a 12407 malformed directory object to cause a Tor instance to pause while 12408 OpenSSL would try to read a passphrase from the terminal. (Tor 12409 instances run without a terminal, which is the case for most Tor 12410 packages, are not impacted.) Fixes bug 24246; bugfix on every 12411 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12412 Found by OSS-Fuzz as testcase 6360145429790720. 12413 - Fix a denial of service issue where an attacker could crash a 12414 directory authority using a malformed router descriptor. Fixes bug 12415 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010 12416 and CVE-2017-8820. 12417 - When checking for replays in the INTRODUCE1 cell data for a 12418 (legacy) onion service, correctly detect replays in the RSA- 12419 encrypted part of the cell. We were previously checking for 12420 replays on the entire cell, but those can be circumvented due to 12421 the malleability of Tor's legacy hybrid encryption. This fix helps 12422 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12423 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12424 and CVE-2017-8819. 12425 12426 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha): 12427 - Fix a use-after-free error that could crash v2 Tor onion services 12428 when they failed to open circuits while expiring introduction 12429 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is 12430 also tracked as TROVE-2017-013 and CVE-2017-8823. 12431 12432 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): 12433 - When running as a relay, make sure that we never build a path 12434 through ourselves, even in the case where we have somehow lost the 12435 version of our descriptor appearing in the consensus. Fixes part 12436 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked 12437 as TROVE-2017-012 and CVE-2017-8822. 12438 12439 o Minor features (bridge, backport from 0.3.1.9): 12440 - Bridges now include notice in their descriptors that they are 12441 bridges, and notice of their distribution status, based on their 12442 publication settings. Implements ticket 18329. For more fine- 12443 grained control of how a bridge is distributed, upgrade to 0.3.2.x 12444 or later. 12445 12446 o Minor features (directory authority, backport from 0.3.2.6-alpha): 12447 - Add an IPv6 address for the "bastet" directory authority. Closes 12448 ticket 24394. 12449 12450 o Minor features (geoip): 12451 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12452 Country database. 12453 12454 o Minor features (security, windows, backport from 0.3.1.1-alpha): 12455 - Enable a couple of pieces of Windows hardening: one 12456 (HeapEnableTerminationOnCorruption) that has been on-by-default 12457 since Windows 8, and unavailable before Windows 7; and one 12458 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't 12459 affect us, but shouldn't do any harm. Closes ticket 21953. 12460 12461 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha): 12462 - Avoid unnecessary calls to directory_fetches_from_authorities() on 12463 relays, to prevent spurious address resolutions and descriptor 12464 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470; 12465 bugfix on in 0.2.8.1-alpha. 12466 12467 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha): 12468 - Fix unused variable warnings in donna's Curve25519 SSE2 code. 12469 Fixes bug 22895; bugfix on 0.2.7.2-alpha. 12470 12471 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha): 12472 - When a circuit is marked for close, do not attempt to package any 12473 cells for channels on that circuit. Previously, we would detect 12474 this condition lower in the call stack, when we noticed that the 12475 circuit had no attached channel, and log an annoying message. 12476 Fixes bug 8185; bugfix on 0.2.5.4-alpha. 12477 12478 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha): 12479 - Avoid a crash when transitioning from client mode to bridge mode. 12480 Previously, we would launch the worker threads whenever our 12481 "public server" mode changed, but not when our "server" mode 12482 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha. 12483 12484 o Minor bugfixes (testing, backport from 0.3.1.6-rc): 12485 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; 12486 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. 12487 12488 12489Changes in version 0.2.8.17 - 2017-12-01 12490 Tor 0.2.8.17 backports important security and stability bugfixes from 12491 later Tor releases. All Tor users should upgrade to this release, or 12492 to another of the releases coming out today. 12493 12494 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan 12495 2018. If you need a release with long-term support, please upgrade with 12496 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 12497 12498 o Major bugfixes (security, backport from 0.3.2.6-alpha): 12499 - Fix a denial of service bug where an attacker could use a 12500 malformed directory object to cause a Tor instance to pause while 12501 OpenSSL would try to read a passphrase from the terminal. (Tor 12502 instances run without a terminal, which is the case for most Tor 12503 packages, are not impacted.) Fixes bug 24246; bugfix on every 12504 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12505 Found by OSS-Fuzz as testcase 6360145429790720. 12506 - When checking for replays in the INTRODUCE1 cell data for a 12507 (legacy) onion service, correctly detect replays in the RSA- 12508 encrypted part of the cell. We were previously checking for 12509 replays on the entire cell, but those can be circumvented due to 12510 the malleability of Tor's legacy hybrid encryption. This fix helps 12511 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12512 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12513 and CVE-2017-8819. 12514 12515 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha): 12516 - Fix a use-after-free error that could crash v2 Tor onion services 12517 when they failed to open circuits while expiring introduction 12518 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is 12519 also tracked as TROVE-2017-013 and CVE-2017-8823. 12520 12521 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): 12522 - When running as a relay, make sure that we never build a path through 12523 ourselves, even in the case where we have somehow lost the version of 12524 our descriptor appearing in the consensus. Fixes part of bug 21534; 12525 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012 12526 and CVE-2017-8822. 12527 12528 o Minor features (bridge, backport from 0.3.1.9): 12529 - Bridges now include notice in their descriptors that they are 12530 bridges, and notice of their distribution status, based on their 12531 publication settings. Implements ticket 18329. For more fine- 12532 grained control of how a bridge is distributed, upgrade to 0.3.2.x 12533 or later. 12534 12535 o Minor features (directory authority, backport from 0.3.2.6-alpha): 12536 - Add an IPv6 address for the "bastet" directory authority. Closes 12537 ticket 24394. 12538 12539 o Minor features (geoip): 12540 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12541 Country database. 12542 12543 o Minor bugfixes (testing, backport from 0.3.1.6-rc): 12544 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; 12545 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. 12546 12547 12548Changes in version 0.2.5.16 - 2017-12-01 12549 Tor 0.2.5.13 backports important security and stability bugfixes from 12550 later Tor releases. All Tor users should upgrade to this release, or 12551 to another of the releases coming out today. 12552 12553 Note: the Tor 0.2.5 series will no longer be supported after 1 May 12554 2018. If you need a release with long-term support, please upgrade to 12555 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 12556 12557 o Major bugfixes (security, backport from 0.3.2.6-alpha): 12558 - Fix a denial of service bug where an attacker could use a 12559 malformed directory object to cause a Tor instance to pause while 12560 OpenSSL would try to read a passphrase from the terminal. (Tor 12561 instances run without a terminal, which is the case for most Tor 12562 packages, are not impacted.) Fixes bug 24246; bugfix on every 12563 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821. 12564 Found by OSS-Fuzz as testcase 6360145429790720. 12565 - When checking for replays in the INTRODUCE1 cell data for a 12566 (legacy) onion service, correctly detect replays in the RSA- 12567 encrypted part of the cell. We were previously checking for 12568 replays on the entire cell, but those can be circumvented due to 12569 the malleability of Tor's legacy hybrid encryption. This fix helps 12570 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on 12571 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009 12572 and CVE-2017-8819. 12573 12574 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha): 12575 - When running as a relay, make sure that we never build a path 12576 through ourselves, even in the case where we have somehow lost the 12577 version of our descriptor appearing in the consensus. Fixes part 12578 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked 12579 as TROVE-2017-012 and CVE-2017-8822. 12580 12581 o Minor features (bridge, backport from 0.3.1.9): 12582 - Bridges now include notice in their descriptors that they are 12583 bridges, and notice of their distribution status, based on their 12584 publication settings. Implements ticket 18329. For more fine- 12585 grained control of how a bridge is distributed, upgrade to 0.3.2.x 12586 or later. 12587 12588 o Minor features (geoip): 12589 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12590 Country database. 12591 12592 12593Changes in version 0.3.2.5-alpha - 2017-11-22 12594 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It 12595 fixes several stability and reliability bugs, including a fix for 12596 intermittent bootstrapping failures that some people have been seeing 12597 since the 0.3.0.x series. 12598 12599 Please test this alpha out -- many of these fixes will soon be 12600 backported to stable Tor versions if no additional bugs are found 12601 in them. 12602 12603 o Major bugfixes (bootstrapping): 12604 - Fetch descriptors aggressively whenever we lack enough to build 12605 circuits, regardless of how many descriptors we are missing. 12606 Previously, we would delay launching the fetch when we had fewer 12607 than 15 missing descriptors, even if some of those descriptors 12608 were blocking circuits from building. Fixes bug 23985; bugfix on 12609 0.1.1.11-alpha. The effects of this bug became worse in 12610 0.3.0.3-alpha, when we began treating missing descriptors from our 12611 primary guards as a reason to delay circuits. 12612 - Don't try fetching microdescriptors from relays that have failed 12613 to deliver them in the past. Fixes bug 23817; bugfix 12614 on 0.3.0.1-alpha. 12615 12616 o Minor features (directory authority): 12617 - Make the "Exit" flag assignment only depend on whether the exit 12618 policy allows connections to ports 80 and 443. Previously relays 12619 would get the Exit flag if they allowed connections to one of 12620 these ports and also port 6667. Resolves ticket 23637. 12621 12622 o Minor features (geoip): 12623 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2 12624 Country database. 12625 12626 o Minor features (linux seccomp2 sandbox): 12627 - Update the sandbox rules so that they should now work correctly 12628 with Glibc 2.26. Closes ticket 24315. 12629 12630 o Minor features (logging): 12631 - Downgrade a pair of log messages that could occur when an exit's 12632 resolver gave us an unusual (but not forbidden) response. Closes 12633 ticket 24097. 12634 - Improve the message we log when re-enabling circuit build timeouts 12635 after having received a consensus. Closes ticket 20963. 12636 12637 o Minor bugfixes (compilation): 12638 - Fix a memory leak warning in one of the libevent-related 12639 configuration tests that could occur when manually specifying 12640 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha. 12641 Found and patched by Alex Xu. 12642 - When detecting OpenSSL on Windows from our configure script, make 12643 sure to try linking with the ws2_32 library. Fixes bug 23783; 12644 bugfix on 0.3.2.2-alpha. 12645 12646 o Minor bugfixes (control port, linux seccomp2 sandbox): 12647 - Avoid a crash when attempting to use the seccomp2 sandbox together 12648 with the OwningControllerProcess feature. Fixes bug 24198; bugfix 12649 on 0.2.5.1-alpha. 12650 12651 o Minor bugfixes (control port, onion services): 12652 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the 12653 HS_DESC event when a service is not able to upload a descriptor. 12654 Fixes bug 24230; bugfix on 0.2.7.1-alpha. 12655 12656 o Minor bugfixes (directory cache): 12657 - Recover better from empty or corrupt files in the consensus cache 12658 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha. 12659 - When a consensus diff calculation is only partially successful, 12660 only record the successful parts as having succeeded. Partial 12661 success can happen if (for example) one compression method fails 12662 but the others succeed. Previously we misrecorded all the 12663 calculations as having succeeded, which would later cause a 12664 nonfatal assertion failure. Fixes bug 24086; bugfix 12665 on 0.3.1.1-alpha. 12666 12667 o Minor bugfixes (logging): 12668 - Only log once if we notice that KIST support is gone. Fixes bug 12669 24158; bugfix on 0.3.2.1-alpha. 12670 - Suppress a log notice when relay descriptors arrive. We already 12671 have a bootstrap progress for this so no need to log notice 12672 everytime tor receives relay descriptors. Microdescriptors behave 12673 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha. 12674 12675 o Minor bugfixes (network layer): 12676 - When closing a connection via close_connection_immediately(), we 12677 mark it as "not blocked on bandwidth", to prevent later calls from 12678 trying to unblock it, and give it permission to read. This fixes a 12679 backtrace warning that can happen on relays under various 12680 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc. 12681 12682 o Minor bugfixes (onion services): 12683 - The introduction circuit was being timed out too quickly while 12684 waiting for the rendezvous circuit to complete. Keep the intro 12685 circuit around longer instead of timing out and reopening new ones 12686 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha. 12687 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval" 12688 so it matches dir-spec.txt. Fixes bug 24262; bugfix 12689 on 0.3.1.1-alpha. 12690 - Silence a warning about failed v3 onion descriptor uploads that 12691 can happen naturally under certain edge cases. Fixes part of bug 12692 23662; bugfix on 0.3.2.1-alpha. 12693 12694 o Minor bugfixes (tests): 12695 - Fix a memory leak in one of the bridge-distribution test cases. 12696 Fixes bug 24345; bugfix on 0.3.2.3-alpha. 12697 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(), 12698 to correctly handle cases where a caller gives it an RSA key of 12699 under 160 bits. (This is not actually a bug in Tor itself, but 12700 rather in our fuzzing code.) Fixes bug 24247; bugfix on 12701 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177. 12702 12703 o Documentation: 12704 - Add notes in man page regarding OS support for the various 12705 scheduler types. Attempt to use less jargon in the scheduler 12706 section. Closes ticket 24254. 12707 12708 12709Changes in version 0.3.2.4-alpha - 2017-11-08 12710 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series. 12711 It fixes several stability and reliability bugs, especially including 12712 a major reliability issue that has been plaguing fast exit relays in 12713 recent months. 12714 12715 o Major bugfixes (exit relays, DNS): 12716 - Fix an issue causing DNS to fail on high-bandwidth exit nodes, 12717 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on 12718 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for 12719 identifying and finding a workaround to this bug and to Moritz, 12720 Arthur Edelstein, and Roger for helping to track it down and 12721 analyze it. 12722 12723 o Major bugfixes (scheduler, channel): 12724 - Stop processing scheduled channels if they closed while flushing 12725 cells. This can happen if the write on the connection fails 12726 leading to the channel being closed while in the scheduler loop. 12727 Fixes bug 23751; bugfix on 0.3.2.1-alpha. 12728 12729 o Minor features (logging, scheduler): 12730 - Introduce a SCHED_BUG() function to log extra information about 12731 the scheduler state if we ever catch a bug in the scheduler. 12732 Closes ticket 23753. 12733 12734 o Minor features (removed deprecations): 12735 - The ClientDNSRejectInternalAddresses flag can once again be set in 12736 non-testing Tor networks, so long as they do not use the default 12737 directory authorities. This change also removes the deprecation of 12738 this flag from 0.2.9.2-alpha. Closes ticket 21031. 12739 12740 o Minor features (testing): 12741 - Our fuzzing tests now test the encrypted portions of v3 onion 12742 service descriptors. Implements more of 21509. 12743 12744 o Minor bugfixes (directory client): 12745 - On failure to download directory information, delay retry attempts 12746 by a random amount based on the "decorrelated jitter" algorithm. 12747 Our previous delay algorithm tended to produce extra-long delays 12748 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha. 12749 12750 o Minor bugfixes (IPv6, v3 single onion services): 12751 - Remove buggy code for IPv6-only v3 single onion services, and 12752 reject attempts to configure them. This release supports IPv4, 12753 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual- 12754 stack v3 single onion services. Fixes bug 23820; bugfix 12755 on 0.3.2.1-alpha. 12756 12757 o Minor bugfixes (logging, relay): 12758 - Give only a protocol warning when the ed25519 key is not 12759 consistent between the descriptor and microdescriptor of a relay. 12760 This can happen, for instance, if the relay has been flagged 12761 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha. 12762 12763 o Minor bugfixes (manpage, onion service): 12764 - Document that the HiddenServiceNumIntroductionPoints option is 12765 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115; 12766 bugfix on 0.3.2.1-alpha. 12767 12768 o Minor bugfixes (memory leaks): 12769 - Fix a minor memory leak at exit in the KIST scheduler. This bug 12770 should have no user-visible impact. Fixes bug 23774; bugfix 12771 on 0.3.2.1-alpha. 12772 - Fix a memory leak when decrypting a badly formatted v3 onion 12773 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha. 12774 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994. 12775 12776 o Minor bugfixes (onion services): 12777 - Cache some needed onion service client information instead of 12778 constantly computing it over and over again. Fixes bug 23623; 12779 bugfix on 0.3.2.1-alpha. 12780 - Properly retry HSv3 descriptor fetches when missing required 12781 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha. 12782 12783 o Minor bugfixes (path selection): 12784 - When selecting relays by bandwidth, avoid a rounding error that 12785 could sometimes cause load to be imbalanced incorrectly. 12786 Previously, we would always round upwards; now, we round towards 12787 the nearest integer. This had the biggest effect when a relay's 12788 weight adjustments should have given it weight 0, but it got 12789 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha. 12790 - When calculating the fraction of nodes that have descriptors, and 12791 all nodes in the network have zero bandwidths, count the number of 12792 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha. 12793 - Actually log the total bandwidth in compute_weighted_bandwidths(). 12794 Fixes bug 24170; bugfix on 0.2.4.3-alpha. 12795 12796 o Minor bugfixes (relay, crash): 12797 - Avoid a crash when transitioning from client mode to bridge mode. 12798 Previously, we would launch the worker threads whenever our 12799 "public server" mode changed, but not when our "server" mode 12800 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha. 12801 12802 o Minor bugfixes (testing): 12803 - Fix a spurious fuzzing-only use of an uninitialized value. Found 12804 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha. 12805 - Test that IPv6-only clients can use microdescriptors when running 12806 "make test-network-all". Requires chutney master 61c28b9 or later. 12807 Closes ticket 24109. 12808 12809 12810Changes in version 0.3.2.3-alpha - 2017-10-27 12811 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes 12812 numerous small bugs in earlier versions of 0.3.2.x, and adds a new 12813 directory authority, Bastet. 12814 12815 o Directory authority changes: 12816 - Add "Bastet" as a ninth directory authority to the default list. 12817 Closes ticket 23910. 12818 - The directory authority "Longclaw" has changed its IP address. 12819 Closes ticket 23592. 12820 12821 o Minor features (bridge): 12822 - Bridge relays can now set the BridgeDistribution config option to 12823 add a "bridge-distribution-request" line to their bridge 12824 descriptor, which tells BridgeDB how they'd like their bridge 12825 address to be given out. (Note that as of Oct 2017, BridgeDB does 12826 not yet implement this feature.) As a side benefit, this feature 12827 provides a way to distinguish bridge descriptors from non-bridge 12828 descriptors. Implements tickets 18329. 12829 12830 o Minor features (client, entry guards): 12831 - Improve log messages when missing descriptors for primary guards. 12832 Resolves ticket 23670. 12833 12834 o Minor features (geoip): 12835 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 12836 Country database. 12837 12838 o Minor bugfixes (bridge): 12839 - Overwrite the bridge address earlier in the process of retrieving 12840 its descriptor, to make sure we reach it on the configured 12841 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha. 12842 12843 o Minor bugfixes (documentation): 12844 - Document better how to read gcov, and what our gcov postprocessing 12845 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha. 12846 12847 o Minor bugfixes (entry guards): 12848 - Tor now updates its guard state when it reads a consensus 12849 regardless of whether it's missing descriptors. That makes tor use 12850 its primary guards to fetch descriptors in some edge cases where 12851 it would previously have used fallback directories. Fixes bug 12852 23862; bugfix on 0.3.0.1-alpha. 12853 12854 o Minor bugfixes (hidden service client): 12855 - When handling multiple SOCKS request for the same .onion address, 12856 only fetch the service descriptor once. 12857 - When a descriptor fetch fails with a non-recoverable error, close 12858 all pending SOCKS requests for that .onion. Fixes bug 23653; 12859 bugfix on 0.3.2.1-alpha. 12860 12861 o Minor bugfixes (hidden service): 12862 - Always regenerate missing hidden service public key files. Prior 12863 to this, if the public key was deleted from disk, it wouldn't get 12864 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch 12865 from "cathugger". 12866 - Make sure that we have a usable ed25519 key when the intro point 12867 relay supports ed25519 link authentication. Fixes bug 24002; 12868 bugfix on 0.3.2.1-alpha. 12869 12870 o Minor bugfixes (hidden service, v2): 12871 - When reloading configured hidden services, copy all information 12872 from the old service object. Previously, some data was omitted, 12873 causing delays in descriptor upload, and other bugs. Fixes bug 12874 23790; bugfix on 0.2.1.9-alpha. 12875 12876 o Minor bugfixes (memory safety, defensive programming): 12877 - Clear the target address when node_get_prim_orport() returns 12878 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha. 12879 12880 o Minor bugfixes (relay): 12881 - Avoid a BUG warning when receiving a dubious CREATE cell while an 12882 option transition is in progress. Fixes bug 23952; bugfix 12883 on 0.3.2.1-alpha. 12884 12885 o Minor bugfixes (testing): 12886 - Adjust the GitLab CI configuration to more closely match that of 12887 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha. 12888 - Prevent scripts/test/coverage from attempting to move gcov output 12889 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha. 12890 - When running unit tests as root, skip a test that would fail 12891 because it expects a permissions error. This affects some 12892 continuous integration setups. Fixes bug 23758; bugfix 12893 on 0.3.2.2-alpha. 12894 - Stop unconditionally mirroring the tor repository in GitLab CI. 12895 This prevented developers from enabling GitLab CI on master. Fixes 12896 bug 23755; bugfix on 0.3.2.2-alpha. 12897 - Fix the hidden service v3 descriptor decoding fuzzing to use the 12898 latest decoding API correctly. Fixes bug 21509; bugfix 12899 on 0.3.2.1-alpha. 12900 12901 o Minor bugfixes (warnings): 12902 - When we get an HTTP request on a SOCKS port, tell the user about 12903 the new HTTPTunnelPort option. Previously, we would give a "Tor is 12904 not an HTTP Proxy" message, which stopped being true when 12905 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix 12906 on 0.3.2.1-alpha. 12907 12908 12909Changes in version 0.2.5.15 - 2017-10-25 12910 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release 12911 series. It also adds a new directory authority, Bastet. 12912 12913 Note: the Tor 0.2.5 series will no longer be supported after 1 May 12914 2018. If you need a release with long-term support, please upgrade to 12915 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 12916 12917 o Directory authority changes: 12918 - Add "Bastet" as a ninth directory authority to the default list. 12919 Closes ticket 23910. 12920 - The directory authority "Longclaw" has changed its IP address. 12921 Closes ticket 23592. 12922 12923 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha): 12924 - Avoid an assertion failure bug affecting our implementation of 12925 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() 12926 handling of "0xx" differs from what we had expected. Fixes bug 12927 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. 12928 12929 o Minor features (geoip): 12930 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 12931 Country database. 12932 12933 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha): 12934 - Fix a memset() off the end of an array when packing cells. This 12935 bug should be harmless in practice, since the corrupted bytes are 12936 still in the same structure, and are always padding bytes, 12937 ignored, or immediately overwritten, depending on compiler 12938 behavior. Nevertheless, because the memset()'s purpose is to make 12939 sure that any other cell-handling bugs can't expose bytes to the 12940 network, we need to fix it. Fixes bug 22737; bugfix on 12941 0.2.4.11-alpha. Fixes CID 1401591. 12942 12943 o Build features (backport from 0.3.1.5-alpha): 12944 - Tor's repository now includes a Travis Continuous Integration (CI) 12945 configuration file (.travis.yml). This is meant to help new 12946 developers and contributors who fork Tor to a Github repository be 12947 better able to test their changes, and understand what we expect 12948 to pass. To use this new build feature, you must fork Tor to your 12949 Github account, then go into the "Integrations" menu in the 12950 repository settings for your fork and enable Travis, then push 12951 your changes. Closes ticket 22636. 12952 12953 12954Changes in version 0.2.8.16 - 2017-10-25 12955 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release 12956 series, including a bugfix for a crash issue that had affected relays 12957 under memory pressure. It also adds a new directory authority, Bastet. 12958 12959 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan 12960 2018. If you need a release with long-term support, please stick with 12961 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 12962 12963 o Directory authority changes: 12964 - Add "Bastet" as a ninth directory authority to the default list. 12965 Closes ticket 23910. 12966 - The directory authority "Longclaw" has changed its IP address. 12967 Closes ticket 23592. 12968 12969 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha): 12970 - Fix a timing-based assertion failure that could occur when the 12971 circuit out-of-memory handler freed a connection's output buffer. 12972 Fixes bug 23690; bugfix on 0.2.6.1-alpha. 12973 12974 o Minor features (directory authorities, backport from 0.3.2.2-alpha): 12975 - Remove longclaw's IPv6 address, as it will soon change. Authority 12976 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves 12977 3/8 directory authorities with IPv6 addresses, but there are also 12978 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. 12979 12980 o Minor features (geoip): 12981 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 12982 Country database. 12983 12984 12985Changes in version 0.2.9.13 - 2017-10-25 12986 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release 12987 series, including a bugfix for a crash issue that had affected relays 12988 under memory pressure. It also adds a new directory authority, Bastet. 12989 12990 o Directory authority changes: 12991 - Add "Bastet" as a ninth directory authority to the default list. 12992 Closes ticket 23910. 12993 - The directory authority "Longclaw" has changed its IP address. 12994 Closes ticket 23592. 12995 12996 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha): 12997 - Fix a timing-based assertion failure that could occur when the 12998 circuit out-of-memory handler freed a connection's output buffer. 12999 Fixes bug 23690; bugfix on 0.2.6.1-alpha. 13000 13001 o Minor features (directory authorities, backport from 0.3.2.2-alpha): 13002 - Remove longclaw's IPv6 address, as it will soon change. Authority 13003 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves 13004 3/8 directory authorities with IPv6 addresses, but there are also 13005 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. 13006 13007 o Minor features (geoip): 13008 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 13009 Country database. 13010 13011 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha): 13012 - When a directory authority rejects a descriptor or extrainfo with 13013 a given digest, mark that digest as undownloadable, so that we do 13014 not attempt to download it again over and over. We previously 13015 tried to avoid downloading such descriptors by other means, but we 13016 didn't notice if we accidentally downloaded one anyway. This 13017 behavior became problematic in 0.2.7.2-alpha, when authorities 13018 began pinning Ed25519 keys. Fixes bug 22349; bugfix 13019 on 0.2.1.19-alpha. 13020 13021 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha): 13022 - Clear the address when node_get_prim_orport() returns early. 13023 Fixes bug 23874; bugfix on 0.2.8.2-alpha. 13024 13025 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc): 13026 - When running as a Windows service, set the ID of the main thread 13027 correctly. Failure to do so made us fail to send log messages to 13028 the controller in 0.2.1.16-rc, slowed down controller event 13029 delivery in 0.2.7.3-rc and later, and crash with an assertion 13030 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha. 13031 Patch and diagnosis from "Vort". 13032 13033 13034Changes in version 0.3.0.12 - 2017-10-25 13035 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release 13036 series, including a bugfix for a crash issue that had affected relays 13037 under memory pressure. It also adds a new directory authority, Bastet. 13038 13039 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan 13040 2018. If you need a release with long-term support, please stick with 13041 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later. 13042 13043 o Directory authority changes: 13044 - Add "Bastet" as a ninth directory authority to the default list. 13045 Closes ticket 23910. 13046 - The directory authority "Longclaw" has changed its IP address. 13047 Closes ticket 23592. 13048 13049 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha): 13050 - Fix a timing-based assertion failure that could occur when the 13051 circuit out-of-memory handler freed a connection's output buffer. 13052 Fixes bug 23690; bugfix on 0.2.6.1-alpha. 13053 13054 o Minor features (directory authorities, backport from 0.3.2.2-alpha): 13055 - Remove longclaw's IPv6 address, as it will soon change. Authority 13056 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves 13057 3/8 directory authorities with IPv6 addresses, but there are also 13058 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. 13059 13060 o Minor features (geoip): 13061 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 13062 Country database. 13063 13064 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha): 13065 - When a directory authority rejects a descriptor or extrainfo with 13066 a given digest, mark that digest as undownloadable, so that we do 13067 not attempt to download it again over and over. We previously 13068 tried to avoid downloading such descriptors by other means, but we 13069 didn't notice if we accidentally downloaded one anyway. This 13070 behavior became problematic in 0.2.7.2-alpha, when authorities 13071 began pinning Ed25519 keys. Fixes bug 22349; bugfix 13072 on 0.2.1.19-alpha. 13073 13074 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha): 13075 - Avoid a possible double close of a circuit by the intro point on 13076 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610; 13077 bugfix on 0.3.0.1-alpha. 13078 13079 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha): 13080 - Clear the address when node_get_prim_orport() returns early. 13081 Fixes bug 23874; bugfix on 0.2.8.2-alpha. 13082 13083 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc): 13084 - When running as a Windows service, set the ID of the main thread 13085 correctly. Failure to do so made us fail to send log messages to 13086 the controller in 0.2.1.16-rc, slowed down controller event 13087 delivery in 0.2.7.3-rc and later, and crash with an assertion 13088 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha. 13089 Patch and diagnosis from "Vort". 13090 13091 13092Changes in version 0.3.1.8 - 2017-10-25 13093 Tor 0.3.1.8 is the second stable release in the 0.3.1 series. 13094 It includes several bugfixes, including a bugfix for a crash issue 13095 that had affected relays under memory pressure. It also adds 13096 a new directory authority, Bastet. 13097 13098 o Directory authority changes: 13099 - Add "Bastet" as a ninth directory authority to the default list. 13100 Closes ticket 23910. 13101 - The directory authority "Longclaw" has changed its IP address. 13102 Closes ticket 23592. 13103 13104 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha): 13105 - Fix a timing-based assertion failure that could occur when the 13106 circuit out-of-memory handler freed a connection's output buffer. 13107 Fixes bug 23690; bugfix on 0.2.6.1-alpha. 13108 13109 o Minor features (directory authorities, backport from 0.3.2.2-alpha): 13110 - Remove longclaw's IPv6 address, as it will soon change. Authority 13111 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves 13112 3/8 directory authorities with IPv6 addresses, but there are also 13113 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. 13114 13115 o Minor features (geoip): 13116 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2 13117 Country database. 13118 13119 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha): 13120 - Fix a compilation warning when building with zstd support on 13121 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found 13122 and fixed by Andreas Stieger. 13123 13124 o Minor bugfixes (compression, backport from 0.3.2.2-alpha): 13125 - Handle a pathological case when decompressing Zstandard data when 13126 the output buffer size is zero. Fixes bug 23551; bugfix 13127 on 0.3.1.1-alpha. 13128 13129 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha): 13130 - Remove the length limit on HTTP status lines that authorities can 13131 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc. 13132 13133 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha): 13134 - Avoid a possible double close of a circuit by the intro point on 13135 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610; 13136 bugfix on 0.3.0.1-alpha. 13137 13138 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha): 13139 - Clear the address when node_get_prim_orport() returns early. 13140 Fixes bug 23874; bugfix on 0.2.8.2-alpha. 13141 13142 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha): 13143 - Fix additional channelpadding unit test failures by using mocked 13144 time instead of actual time for all tests. Fixes bug 23608; bugfix 13145 on 0.3.1.1-alpha. 13146 13147 13148Changes in version 0.3.2.2-alpha - 2017-09-29 13149 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This 13150 release fixes several minor bugs in the new scheduler and next- 13151 generation onion services; both features were newly added in the 0.3.2 13152 series. Other fixes in this alpha include several fixes for non-fatal 13153 tracebacks which would appear in logs. 13154 13155 With the aim to stabilise the 0.3.2 series by 15 December 2017, this 13156 alpha does not contain any substantial new features. Minor features 13157 include better testing and logging. 13158 13159 The following comprises the complete list of changes included 13160 in 0.3.2.2-alpha: 13161 13162 o Major bugfixes (relay, crash, assertion failure): 13163 - Fix a timing-based assertion failure that could occur when the 13164 circuit out-of-memory handler freed a connection's output buffer. 13165 Fixes bug 23690; bugfix on 0.2.6.1-alpha. 13166 13167 o Major bugfixes (scheduler): 13168 - If a channel is put into the scheduler's pending list, then it 13169 starts closing, and then if the scheduler runs before it finishes 13170 closing, the scheduler will get stuck trying to flush its cells 13171 while the lower layers refuse to cooperate. Fix that race 13172 condition by giving the scheduler an escape method. Fixes bug 13173 23676; bugfix on 0.3.2.1-alpha. 13174 13175 o Minor features (build, compilation): 13176 - The "check-changes" feature is now part of the "make check" tests; 13177 we'll use it to try to prevent misformed changes files from 13178 accumulating. Closes ticket 23564. 13179 - Tor builds should now fail if there are any mismatches between the 13180 C type representing a configuration variable and the C type the 13181 data-driven parser uses to store a value there. Previously, we 13182 needed to check these by hand, which sometimes led to mistakes. 13183 Closes ticket 23643. 13184 13185 o Minor features (directory authorities): 13186 - Remove longclaw's IPv6 address, as it will soon change. Authority 13187 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves 13188 3/8 directory authorities with IPv6 addresses, but there are also 13189 52 fallback directory mirrors with IPv6 addresses. Resolves 19760. 13190 13191 o Minor features (hidden service, circuit, logging): 13192 - Improve logging of many callsite in the circuit subsystem to print 13193 the circuit identifier(s). 13194 - Log when we cleanup an intro point from a service so we know when 13195 and for what reason it happened. Closes ticket 23604. 13196 13197 o Minor features (logging): 13198 - Log more circuit information whenever we are about to try to 13199 package a relay cell on a circuit with a nonexistent n_chan. 13200 Attempt to diagnose ticket 8185. 13201 - Improve info-level log identification of particular circuits, to 13202 help with debugging. Closes ticket 23645. 13203 13204 o Minor features (relay): 13205 - When choosing which circuits can be expired as unused, consider 13206 circuits from clients even if those clients used regular CREATE 13207 cells to make them; and do not consider circuits from relays even 13208 if they were made with CREATE_FAST. Part of ticket 22805. 13209 13210 o Minor features (robustness): 13211 - Change several fatal assertions when flushing buffers into non- 13212 fatal assertions, to prevent any recurrence of 23690. 13213 13214 o Minor features (spec conformance, bridge, diagnostic): 13215 - When handling the USERADDR command on an ExtOrPort, warn when the 13216 transports provides a USERADDR with no port. In a future version, 13217 USERADDR commands of this format may be rejected. Detects problems 13218 related to ticket 23080. 13219 13220 o Minor features (testing): 13221 - Add a unit test to make sure that our own generated platform 13222 string will be accepted by directory authorities. Closes 13223 ticket 22109. 13224 13225 o Minor bugfixes (bootstrapping): 13226 - When warning about state file clock skew, report the correct 13227 direction for the detected skew. Fixes bug 23606; bugfix 13228 on 0.2.8.1-alpha. 13229 - Avoid an assertion failure when logging a state file clock skew 13230 very early in bootstrapping. Fixes bug 23607; bugfix 13231 on 0.3.2.1-alpha. 13232 13233 o Minor bugfixes (build, compilation): 13234 - Fix a compilation warning when building with zstd support on 13235 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found 13236 and fixed by Andreas Stieger. 13237 - When searching for OpenSSL, don't accept any OpenSSL library that 13238 lacks TLSv1_1_method(): Tor doesn't build with those versions. 13239 Additionally, look in /usr/local/opt/openssl, if it's present. 13240 These changes together repair the default build on OSX systems 13241 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha. 13242 13243 o Minor bugfixes (compression): 13244 - Handle a pathological case when decompressing Zstandard data when 13245 the output buffer size is zero. Fixes bug 23551; bugfix 13246 on 0.3.1.1-alpha. 13247 13248 o Minor bugfixes (documentation): 13249 - Fix manpage to not refer to the obsolete (and misspelled) 13250 UseEntryGuardsAsDirectoryGuards parameter in the description of 13251 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha. 13252 13253 o Minor bugfixes (hidden service v3): 13254 - Don't log an assertion failure when we can't find the right 13255 information to extend to an introduction point. In rare cases, 13256 this could happen, causing a warning, even though tor would 13257 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha. 13258 - Pad RENDEZVOUS cell up to the size of the legacy cell which is 13259 much bigger so the rendezvous point can't distinguish which hidden 13260 service protocol is being used. Fixes bug 23420; bugfix 13261 on 0.3.2.1-alpha. 13262 13263 o Minor bugfixes (hidden service, relay): 13264 - Avoid a possible double close of a circuit by the intro point on 13265 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610; 13266 bugfix on 0.3.0.1-alpha. 13267 13268 o Minor bugfixes (logging, relay shutdown, annoyance): 13269 - When a circuit is marked for close, do not attempt to package any 13270 cells for channels on that circuit. Previously, we would detect 13271 this condition lower in the call stack, when we noticed that the 13272 circuit had no attached channel, and log an annoying message. 13273 Fixes bug 8185; bugfix on 0.2.5.4-alpha. 13274 13275 o Minor bugfixes (scheduler): 13276 - When switching schedulers due to a consensus change, we didn't 13277 give the new scheduler a chance to react to the consensus. Fix 13278 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha. 13279 - Make the KISTSchedRunInterval option a non negative value. With 13280 this, the way to disable KIST through the consensus is to set it 13281 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha. 13282 - Only notice log the selected scheduler when we switch scheduler 13283 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha. 13284 - Avoid a compilation warning on macOS in scheduler_ev_add() caused 13285 by a different tv_usec data type. Fixes bug 23575; bugfix 13286 on 0.3.2.1-alpha. 13287 - Make a hard exit if tor is unable to pick a scheduler which can 13288 happen if the user specifies a scheduler type that is not 13289 supported and not other types in Schedulers. Fixes bug 23581; 13290 bugfix on 0.3.2.1-alpha. 13291 - Properly initialize the scheduler last run time counter so it is 13292 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha. 13293 13294 o Minor bugfixes (testing): 13295 - Capture and detect several "Result does not fit" warnings in unit 13296 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix 13297 on 0.2.9.3-alpha. 13298 - Fix additional channelpadding unit test failures by using mocked 13299 time instead of actual time for all tests. Fixes bug 23608; bugfix 13300 on 0.3.1.1-alpha. 13301 - The removal of some old scheduler options caused some tests to 13302 fail on BSD systems. Assume current behavior is correct and make 13303 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha. 13304 13305 o Code simplification and refactoring: 13306 - Remove various ways of testing circuits and connections for 13307 "clientness"; instead, favor channel_is_client(). Part of 13308 ticket 22805. 13309 13310 o Deprecated features: 13311 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are 13312 now deprecated; they do not apply to relays, and they have had no 13313 effect on clients since 0.2.8.x. Closes ticket 19704. 13314 13315 o Documentation: 13316 - HiddenServiceVersion man page entry wasn't mentioning the now 13317 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha. 13318 - Clarify that the Address option is entirely about setting an 13319 advertised IPv4 address. Closes ticket 18891. 13320 - Clarify the manpage's use of the term "address" to clarify what 13321 kind of address is intended. Closes ticket 21405. 13322 - Document that onion service subdomains are allowed, and ignored. 13323 Closes ticket 18736. 13324 13325 13326Changes in version 0.3.2.1-alpha - 2017-09-18 13327 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It 13328 includes support for our next-generation ("v3") onion service 13329 protocol, and adds a new circuit scheduler for more responsive 13330 forwarding decisions from relays. There are also numerous other small 13331 features and bugfixes here. 13332 13333 Below are the changes since Tor 0.3.1.7. 13334 13335 o Major feature (scheduler, channel): 13336 - Tor now uses new schedulers to decide which circuits should 13337 deliver cells first, in order to improve congestion at relays. The 13338 first type is called "KIST" ("Kernel Informed Socket Transport"), 13339 and is only available on Linux-like systems: it uses feedback from 13340 the kernel to prevent the kernel's TCP buffers from growing too 13341 full. The second new scheduler type is called "KISTLite": it 13342 behaves the same as KIST, but runs on systems without kernel 13343 support for inspecting TCP implementation details. The old 13344 scheduler is still available, under the name "Vanilla". To change 13345 the default scheduler preference order, use the new "Schedulers" 13346 option. (The default preference order is "KIST,KISTLite,Vanilla".) 13347 13348 Matt Traudt implemented KIST, based on research by Rob Jansen, 13349 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For 13350 more information, see the design paper at 13351 http://www.robgjansen.com/publications/kist-sec2014.pdf and the 13352 followup implementation paper at https://arxiv.org/abs/1709.01044. 13353 Closes ticket 12541. 13354 13355 o Major features (next-generation onion services): 13356 - Tor now supports the next-generation onion services protocol for 13357 clients and services! As part of this release, the core of 13358 proposal 224 has been implemented and is available for 13359 experimentation and testing by our users. This newer version of 13360 onion services ("v3") features many improvements over the legacy 13361 system, including: 13362 13363 a) Better crypto (replaced SHA1/DH/RSA1024 13364 with SHA3/ed25519/curve25519) 13365 13366 b) Improved directory protocol, leaking much less information to 13367 directory servers. 13368 13369 c) Improved directory protocol, with smaller surface for 13370 targeted attacks. 13371 13372 d) Better onion address security against impersonation. 13373 13374 e) More extensible introduction/rendezvous protocol. 13375 13376 f) A cleaner and more modular codebase. 13377 13378 You can identify a next-generation onion address by its length: 13379 they are 56 characters long, as in 13380 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion". 13381 13382 In the future, we will release more options and features for v3 13383 onion services, but we first need a testing period, so that the 13384 current codebase matures and becomes more robust. Planned features 13385 include: offline keys, advanced client authorization, improved 13386 guard algorithms, and statistics. For full details, see 13387 proposal 224. 13388 13389 Legacy ("v2") onion services will still work for the foreseeable 13390 future, and will remain the default until this new codebase gets 13391 tested and hardened. Service operators who want to experiment with 13392 the new system can use the 'HiddenServiceVersion 3' torrc 13393 directive along with the regular onion service configuration 13394 options. We will publish a blog post about this new feature 13395 soon! Enjoy! 13396 13397 o Major bugfixes (usability, control port): 13398 - Report trusted clock skew indications as bootstrap errors, so 13399 controllers can more easily alert users when their clocks are 13400 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha. 13401 13402 o Minor features (bug detection): 13403 - Log a warning message with a stack trace for any attempt to call 13404 get_options() during option validation. This pattern has caused 13405 subtle bugs in the past. Closes ticket 22281. 13406 13407 o Minor features (client): 13408 - You can now use Tor as a tunneled HTTP proxy: use the new 13409 HTTPTunnelPort option to open a port that accepts HTTP CONNECT 13410 requests. Closes ticket 22407. 13411 - Add an extra check to make sure that we always use the newer guard 13412 selection code for picking our guards. Closes ticket 22779. 13413 - When downloading (micro)descriptors, don't split the list into 13414 multiple requests unless we want at least 32 descriptors. 13415 Previously, we split at 4, not 32, which led to significant 13416 overhead in HTTP request size and degradation in compression 13417 performance. Closes ticket 23220. 13418 13419 o Minor features (command line): 13420 - Add a new commandline option, --key-expiration, which prints when 13421 the current signing key is going to expire. Implements ticket 13422 17639; patch by Isis Lovecruft. 13423 13424 o Minor features (control port): 13425 - If an application tries to use the control port as an HTTP proxy, 13426 respond with a meaningful "This is the Tor control port" message, 13427 and log the event. Closes ticket 1667. Patch from Ravi 13428 Chandra Padmala. 13429 - Provide better error message for GETINFO desc/(id|name) when not 13430 fetching router descriptors. Closes ticket 5847. Patch by 13431 Kevin Butler. 13432 - Add GETINFO "{desc,md}/download-enabled", to inform the controller 13433 whether Tor will try to download router descriptors and 13434 microdescriptors respectively. Closes ticket 22684. 13435 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available", 13436 so controllers can tell whether the geoip databases are loaded. 13437 Closes ticket 23237. 13438 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth 13439 events. Closes ticket 19254. Patch by "DonnchaC". 13440 13441 o Minor features (development support): 13442 - Developers can now generate a call-graph for Tor using the 13443 "calltool" python program, which post-processes object dumps. It 13444 should work okay on many Linux and OSX platforms, and might work 13445 elsewhere too. To run it, install calltool from 13446 https://gitweb.torproject.org/user/nickm/calltool.git and run 13447 "make callgraph". Closes ticket 19307. 13448 13449 o Minor features (ed25519): 13450 - Add validation function to checks for torsion components in 13451 ed25519 public keys, used by prop224 client-side code. Closes 13452 ticket 22006. Math help by Ian Goldberg. 13453 13454 o Minor features (exit relay, DNS): 13455 - Improve the clarity and safety of the log message from evdns when 13456 receiving an apparently spoofed DNS reply. Closes ticket 3056. 13457 13458 o Minor features (integration, hardening): 13459 - Add a new NoExec option to prevent Tor from running other 13460 programs. When this option is set to 1, Tor will never try to run 13461 another program, regardless of the settings of 13462 PortForwardingHelper, ClientTransportPlugin, or 13463 ServerTransportPlugin. Once NoExec is set, it cannot be disabled 13464 without restarting Tor. Closes ticket 22976. 13465 13466 o Minor features (logging): 13467 - Improve the warning message for specifying a relay by nickname. 13468 The previous message implied that nickname registration was still 13469 part of the Tor network design, which it isn't. Closes 13470 ticket 20488. 13471 - If the sandbox filter fails to load, suggest to the user that 13472 their kernel might not support seccomp2. Closes ticket 23090. 13473 13474 o Minor features (portability): 13475 - Check at configure time whether uint8_t is the same type as 13476 unsigned char. Lots of existing code already makes this 13477 assumption, and there could be strict aliasing issues if the 13478 assumption is violated. Closes ticket 22410. 13479 13480 o Minor features (relay, configuration): 13481 - Reject attempts to use relative file paths when RunAsDaemon is 13482 set. Previously, Tor would accept these, but the directory- 13483 changing step of RunAsDaemon would give strange and/or confusing 13484 results. Closes ticket 22731. 13485 13486 o Minor features (startup, safety): 13487 - When configured to write a PID file, Tor now exits if it is unable 13488 to do so. Previously, it would warn and continue. Closes 13489 ticket 20119. 13490 13491 o Minor features (static analysis): 13492 - The BUG() macro has been changed slightly so that Coverity no 13493 longer complains about dead code if the bug is impossible. Closes 13494 ticket 23054. 13495 13496 o Minor features (testing): 13497 - The default chutney network tests now include tests for the v3 13498 hidden service design. Make sure you have the latest version of 13499 chutney if you want to run these. Closes ticket 22437. 13500 - Add a unit test to verify that we can parse a hardcoded v2 hidden 13501 service descriptor. Closes ticket 15554. 13502 13503 o Minor bugfixes (certificate handling): 13504 - Fix a time handling bug in Tor certificates set to expire after 13505 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by 13506 Coverity as CID 1415728. 13507 13508 o Minor bugfixes (client, usability): 13509 - Refrain from needlessly rejecting SOCKS5-with-hostnames and 13510 SOCKS4a requests that contain IP address strings, even when 13511 SafeSocks in enabled, as this prevents user from connecting to 13512 known IP addresses without relying on DNS for resolving. SafeSocks 13513 still rejects SOCKS connections that connect to IP addresses when 13514 those addresses are _not_ encoded as hostnames. Fixes bug 22461; 13515 bugfix on Tor 0.2.6.2-alpha. 13516 13517 o Minor bugfixes (code correctness): 13518 - Call htons() in extend_cell_format() for encoding a 16-bit value. 13519 Previously we used ntohs(), which happens to behave the same on 13520 all the platforms we support, but which isn't really correct. 13521 Fixes bug 23106; bugfix on 0.2.4.8-alpha. 13522 - For defense-in-depth, make the controller's write_escaped_data() 13523 function robust to extremely long inputs. Fixes bug 19281; bugfix 13524 on 0.1.1.1-alpha. Reported by Guido Vranken. 13525 13526 o Minor bugfixes (compilation): 13527 - Fix unused-variable warnings in donna's Curve25519 SSE2 code. 13528 Fixes bug 22895; bugfix on 0.2.7.2-alpha. 13529 13530 o Minor bugfixes (consensus expiry): 13531 - Check for adequate directory information correctly. Previously, Tor 13532 would reconsider whether it had sufficient directory information 13533 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha. 13534 13535 o Minor bugfixes (directory protocol): 13536 - Directory servers now include a "Date:" http header for response 13537 codes other than 200. Clients starting with a skewed clock and a 13538 recent consensus were getting "304 Not modified" responses from 13539 directory authorities, so without the Date header, the client 13540 would never hear about a wrong clock. Fixes bug 23499; bugfix 13541 on 0.0.8rc1. 13542 - Make clients wait for 6 seconds before trying to download a 13543 consensus from an authority. Fixes bug 17750; bugfix 13544 on 0.2.8.1-alpha. 13545 13546 o Minor bugfixes (DoS-resistance): 13547 - If future code asks if there are any running bridges, without 13548 checking if bridges are enabled, log a BUG warning rather than 13549 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha. 13550 13551 o Minor bugfixes (format strictness): 13552 - Restrict several data formats to decimal. Previously, the 13553 BuildTimeHistogram entries in the state file, the "bw=" entries in 13554 the bandwidth authority file, and the process IDs passed to the 13555 __OwningControllerProcess option could all be specified in hex or 13556 octal as well as in decimal. This was not an intentional feature. 13557 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha, 13558 and 0.2.2.28-beta. 13559 13560 o Minor bugfixes (heartbeat): 13561 - If we fail to write a heartbeat message, schedule a retry for the 13562 minimum heartbeat interval number of seconds in the future. Fixes 13563 bug 19476; bugfix on 0.2.3.1-alpha. 13564 13565 o Minor bugfixes (linux seccomp2 sandbox, logging): 13566 - Fix some messages on unexpected errors from the seccomp2 library. 13567 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks". 13568 13569 o Minor bugfixes (logging): 13570 - Remove duplicate log messages regarding opening non-local 13571 SocksPorts upon parsing config and opening listeners at startup. 13572 Fixes bug 4019; bugfix on 0.2.3.3-alpha. 13573 - Use a more comprehensible log message when telling the user 13574 they've excluded every running exit node. Fixes bug 7890; bugfix 13575 on 0.2.2.25-alpha. 13576 - When logging the number of descriptors we intend to download per 13577 directory request, do not log a number higher than then the number 13578 of descriptors we're fetching in total. Fixes bug 19648; bugfix 13579 on 0.1.1.8-alpha. 13580 - When warning about a directory owned by the wrong user, log the 13581 actual name of the user owning the directory. Previously, we'd log 13582 the name of the process owner twice. Fixes bug 23487; bugfix 13583 on 0.2.9.1-alpha. 13584 - The tor specification says hop counts are 1-based, so fix two log 13585 messages that mistakenly logged 0-based hop counts. Fixes bug 13586 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor. 13587 Credit to Xiaofan Li for reporting this issue. 13588 13589 o Minor bugfixes (portability): 13590 - Stop using the PATH_MAX variable, which is not defined on GNU 13591 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha. 13592 13593 o Minor bugfixes (relay): 13594 - When uploading our descriptor for the first time after startup, 13595 report the reason for uploading as "Tor just started" rather than 13596 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha. 13597 - Avoid unnecessary calls to directory_fetches_from_authorities() on 13598 relays, to prevent spurious address resolutions and descriptor 13599 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470; 13600 bugfix on in 0.2.8.1-alpha. 13601 13602 o Minor bugfixes (tests): 13603 - Fix a broken unit test for the OutboundAddress option: the parsing 13604 function was never returning an error on failure. Fixes bug 23366; 13605 bugfix on 0.3.0.3-alpha. 13606 - Fix a signed-integer overflow in the unit tests for 13607 dir/download_status_random_backoff, which was untriggered until we 13608 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha. 13609 13610 o Minor bugfixes (usability, control port): 13611 - Stop making an unnecessary routerlist check in NETINFO clock skew 13612 detection; this was preventing clients from reporting NETINFO clock 13613 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha. 13614 13615 o Code simplification and refactoring: 13616 - Extract the code for handling newly-open channels into a separate 13617 function from the general code to handle channel state 13618 transitions. This change simplifies our callgraph, reducing the 13619 size of the largest strongly connected component by roughly a 13620 factor of two. Closes ticket 22608. 13621 - Remove dead code for largely unused statistics on the number of 13622 times we've attempted various public key operations. Fixes bug 13623 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft. 13624 - Remove several now-obsolete functions for asking about old 13625 variants directory authority status. Closes ticket 22311; patch 13626 from "huyvq". 13627 - Remove some of the code that once supported "Named" and "Unnamed" 13628 routers. Authorities no longer vote for these flags. Closes 13629 ticket 22215. 13630 - Rename the obsolete malleable hybrid_encrypt functions used in TAP 13631 and old hidden services, to indicate that they aren't suitable for 13632 new protocols or formats. Closes ticket 23026. 13633 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket 13634 22521. Patch from Neel Chauhan. 13635 - Split the enormous circuit_send_next_onion_skin() function into 13636 multiple subfunctions. Closes ticket 22804. 13637 - Split the portions of the buffer.c module that handle particular 13638 protocols into separate modules. Part of ticket 23149. 13639 - Use our test macros more consistently, to produce more useful 13640 error messages when our unit tests fail. Add coccinelle patches to 13641 allow us to re-check for test macro uses. Closes ticket 22497. 13642 13643 o Deprecated features: 13644 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They 13645 only applies to direct unencrypted HTTP connections to your 13646 directory server, which your Tor probably isn't using. Closes 13647 ticket 20575. 13648 13649 o Documentation: 13650 - Clarify in the manual that "Sandbox 1" is only supported on Linux 13651 kernels. Closes ticket 22677. 13652 - Document all values of PublishServerDescriptor in the manpage. 13653 Closes ticket 15645. 13654 - Improve the documentation for the directory port part of the 13655 DirAuthority line. Closes ticket 20152. 13656 - Restore documentation for the authorities' "approved-routers" 13657 file. Closes ticket 21148. 13658 13659 o Removed features: 13660 - The AllowDotExit option has been removed as unsafe. It has been 13661 deprecated since 0.2.9.2-alpha. Closes ticket 23426. 13662 - The ClientDNSRejectInternalAddresses flag can no longer be set on 13663 non-testing networks. It has been deprecated since 0.2.9.2-alpha. 13664 Closes ticket 21031. 13665 - The controller API no longer includes an AUTHDIR_NEWDESCS event: 13666 nobody was using it any longer. Closes ticket 22377. 13667 13668 13669Changes in version 0.2.8.15 - 2017-09-18 13670 Tor 0.2.8.15 backports a collection of bugfixes from later 13671 Tor series. 13672 13673 Most significantly, it includes a fix for TROVE-2017-008, a 13674 security bug that affects hidden services running with the 13675 SafeLogging option disabled. For more information, see 13676 https://trac.torproject.org/projects/tor/ticket/23490 13677 13678 Note that Tor 0.2.8.x will no longer be supported after 1 Jan 13679 2018. We suggest that you upgrade to the latest stable release if 13680 possible. If you can't, we recommend that you upgrade at least to 13681 0.2.9, which will be supported until 2020. 13682 13683 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha): 13684 - Avoid an assertion failure bug affecting our implementation of 13685 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() 13686 handling of "0xx" differs from what we had expected. Fixes bug 13687 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. 13688 13689 o Minor features: 13690 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 13691 Country database. 13692 13693 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha): 13694 - Backport a fix for an "unused variable" warning that appeared 13695 in some versions of mingw. Fixes bug 22838; bugfix on 13696 0.2.8.1-alpha. 13697 13698 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha): 13699 - Fix a memset() off the end of an array when packing cells. This 13700 bug should be harmless in practice, since the corrupted bytes are 13701 still in the same structure, and are always padding bytes, 13702 ignored, or immediately overwritten, depending on compiler 13703 behavior. Nevertheless, because the memset()'s purpose is to make 13704 sure that any other cell-handling bugs can't expose bytes to the 13705 network, we need to fix it. Fixes bug 22737; bugfix on 13706 0.2.4.11-alpha. Fixes CID 1401591. 13707 13708 o Build features (backport from 0.3.1.5-alpha): 13709 - Tor's repository now includes a Travis Continuous Integration (CI) 13710 configuration file (.travis.yml). This is meant to help new 13711 developers and contributors who fork Tor to a Github repository be 13712 better able to test their changes, and understand what we expect 13713 to pass. To use this new build feature, you must fork Tor to your 13714 Github account, then go into the "Integrations" menu in the 13715 repository settings for your fork and enable Travis, then push 13716 your changes. Closes ticket 22636. 13717 13718 13719Changes in version 0.2.9.12 - 2017-09-18 13720 Tor 0.2.9.12 backports a collection of bugfixes from later 13721 Tor series. 13722 13723 Most significantly, it includes a fix for TROVE-2017-008, a 13724 security bug that affects hidden services running with the 13725 SafeLogging option disabled. For more information, see 13726 https://trac.torproject.org/projects/tor/ticket/23490 13727 13728 o Major features (security, backport from 0.3.0.2-alpha): 13729 - Change the algorithm used to decide DNS TTLs on client and server 13730 side, to better resist DNS-based correlation attacks like the 13731 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and 13732 Feamster. Now relays only return one of two possible DNS TTL 13733 values, and clients are willing to believe DNS TTL values up to 3 13734 hours long. Closes ticket 19769. 13735 13736 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc): 13737 - Fix a rare crash when sending a begin cell on a circuit whose 13738 linked directory connection had already been closed. Fixes bug 13739 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett. 13740 13741 o Major bugfixes (DNS, backport from 0.3.0.2-alpha): 13742 - Fix a bug that prevented exit nodes from caching DNS records for 13743 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha. 13744 13745 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha): 13746 - Fix a typo that had prevented TPROXY-based transparent proxying 13747 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha. 13748 Patch from "d4fq0fQAgoJ". 13749 13750 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha): 13751 - Avoid an assertion failure bug affecting our implementation of 13752 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() 13753 handling of "0xx" differs from what we had expected. Fixes bug 13754 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. 13755 13756 o Minor features (code style, backport from 0.3.1.3-alpha): 13757 - Add "Falls through" comments to our codebase, in order to silence 13758 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas 13759 Stieger. Closes ticket 22446. 13760 13761 o Minor features (geoip): 13762 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 13763 Country database. 13764 13765 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha): 13766 - Roll over monthly accounting at the configured hour and minute, 13767 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1. 13768 Found by Andrey Karpov with PVS-Studio. 13769 13770 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha): 13771 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915; 13772 bugfix on 0.2.8.1-alpha. 13773 - Fix warnings when building with libscrypt and openssl scrypt support 13774 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. 13775 - When building with certain versions the mingw C header files, avoid 13776 float-conversion warnings when calling the C functions isfinite(), 13777 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha. 13778 13779 o Minor bugfixes (compilation, backport from 0.3.1.7): 13780 - Avoid compiler warnings in the unit tests for running tor_sscanf() 13781 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. 13782 13783 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha): 13784 - Backport a fix for an "unused variable" warning that appeared 13785 in some versions of mingw. Fixes bug 22838; bugfix on 13786 0.2.8.1-alpha. 13787 13788 o Minor bugfixes (controller, backport from 0.3.1.7): 13789 - Do not crash when receiving a HSPOST command with an empty body. 13790 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. 13791 - Do not crash when receiving a POSTDESCRIPTOR command with an 13792 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. 13793 13794 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha): 13795 - Avoid Coverity build warnings related to our BUG() macro. By 13796 default, Coverity treats BUG() as the Linux kernel does: an 13797 instant abort(). We need to override that so our BUG() macro 13798 doesn't prevent Coverity from analyzing functions that use it. 13799 Fixes bug 23030; bugfix on 0.2.9.1-alpha. 13800 13801 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha): 13802 - Fix a memset() off the end of an array when packing cells. This 13803 bug should be harmless in practice, since the corrupted bytes are 13804 still in the same structure, and are always padding bytes, 13805 ignored, or immediately overwritten, depending on compiler 13806 behavior. Nevertheless, because the memset()'s purpose is to make 13807 sure that any other cell-handling bugs can't expose bytes to the 13808 network, we need to fix it. Fixes bug 22737; bugfix on 13809 0.2.4.11-alpha. Fixes CID 1401591. 13810 13811 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha): 13812 - When setting the maximum number of connections allowed by the OS, 13813 always allow some extra file descriptors for other files. Fixes 13814 bug 22797; bugfix on 0.2.0.10-alpha. 13815 13816 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha): 13817 - Avoid a sandbox failure when trying to re-bind to a socket and 13818 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. 13819 13820 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha): 13821 - Permit the fchmod system call, to avoid crashing on startup when 13822 starting with the seccomp2 sandbox and an unexpected set of 13823 permissions on the data directory or its contents. Fixes bug 13824 22516; bugfix on 0.2.5.4-alpha. 13825 13826 o Minor bugfixes (relay, backport from 0.3.0.5-rc): 13827 - Avoid a double-marked-circuit warning that could happen when we 13828 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix 13829 on 0.1.0.1-rc. 13830 13831 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha): 13832 - Reject version numbers with non-numeric prefixes (such as +, -, or 13833 whitespace). Disallowing whitespace prevents differential version 13834 parsing between POSIX-based and Windows platforms. Fixes bug 21507 13835 and part of 21508; bugfix on 0.0.8pre1. 13836 13837 o Build features (backport from 0.3.1.5-alpha): 13838 - Tor's repository now includes a Travis Continuous Integration (CI) 13839 configuration file (.travis.yml). This is meant to help new 13840 developers and contributors who fork Tor to a Github repository be 13841 better able to test their changes, and understand what we expect 13842 to pass. To use this new build feature, you must fork Tor to your 13843 Github account, then go into the "Integrations" menu in the 13844 repository settings for your fork and enable Travis, then push 13845 your changes. Closes ticket 22636. 13846 13847 13848Changes in version 0.3.0.11 - 2017-09-18 13849 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1 13850 series. 13851 13852 Most significantly, it includes a fix for TROVE-2017-008, a 13853 security bug that affects hidden services running with the 13854 SafeLogging option disabled. For more information, see 13855 https://trac.torproject.org/projects/tor/ticket/23490 13856 13857 o Minor features (code style, backport from 0.3.1.7): 13858 - Add "Falls through" comments to our codebase, in order to silence 13859 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas 13860 Stieger. Closes ticket 22446. 13861 13862 o Minor features: 13863 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 13864 Country database. 13865 13866 o Minor bugfixes (compilation, backport from 0.3.1.7): 13867 - Avoid compiler warnings in the unit tests for calling tor_sscanf() 13868 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. 13869 13870 o Minor bugfixes (controller, backport from 0.3.1.7): 13871 - Do not crash when receiving a HSPOST command with an empty body. 13872 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. 13873 - Do not crash when receiving a POSTDESCRIPTOR command with an empty 13874 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. 13875 13876 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha): 13877 - When setting the maximum number of connections allowed by the OS, 13878 always allow some extra file descriptors for other files. Fixes 13879 bug 22797; bugfix on 0.2.0.10-alpha. 13880 13881 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc): 13882 - Remove a forgotten debugging message when an introduction point 13883 successfully establishes a hidden service prop224 circuit with 13884 a client. 13885 - Change three other log_warn() for an introduction point to 13886 protocol warnings, because they can be failure from the network 13887 and are not relevant to the operator. Fixes bug 23078; bugfix on 13888 0.3.0.1-alpha and 0.3.0.2-alpha. 13889 13890 13891Changes in version 0.3.1.7 - 2017-09-18 13892 Tor 0.3.1.7 is the first stable release in the 0.3.1 series. 13893 13894 With the 0.3.1 series, Tor now serves and downloads directory 13895 information in more compact formats, to save on bandwidth overhead. It 13896 also contains a new padding system to resist netflow-based traffic 13897 analysis, and experimental support for building parts of Tor in Rust 13898 (though no parts of Tor are in Rust yet). There are also numerous 13899 small features, bugfixes on earlier release series, and groundwork for 13900 the hidden services revamp of 0.3.2. 13901 13902 This release also includes a fix for TROVE-2017-008, a security bug 13903 that affects hidden services running with the SafeLogging option 13904 disabled. For more information, see 13905 https://trac.torproject.org/projects/tor/ticket/23490 13906 13907 Per our stable release policy, we plan to support each stable release 13908 series for at least the next nine months, or for three months after 13909 the first stable release of the next series: whichever is longer. If 13910 you need a release with long-term support, we recommend that you stay 13911 with the 0.2.9 series. 13912 13913 Below is a list of the changes since 0.3.1.6-rc. For a list of all 13914 changes since 0.3.0, see the ReleaseNotes file. 13915 13916 o Major bugfixes (security, hidden services, loggging): 13917 - Fix a bug where we could log uninitialized stack when a certain 13918 hidden service error occurred while SafeLogging was disabled. 13919 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as 13920 TROVE-2017-008 and CVE-2017-0380. 13921 13922 o Minor features (defensive programming): 13923 - Create a pair of consensus parameters, nf_pad_tor2web and 13924 nf_pad_single_onion, to disable netflow padding in the consensus 13925 for non-anonymous connections in case the overhead is high. Closes 13926 ticket 17857. 13927 13928 o Minor features (diagnostic): 13929 - Add a stack trace to the bug warnings that can be logged when 13930 trying to send an outgoing relay cell with n_chan == 0. Diagnostic 13931 attempt for bug 23105. 13932 13933 o Minor features (geoip): 13934 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2 13935 Country database. 13936 13937 o Minor bugfixes (compilation): 13938 - Avoid compiler warnings in the unit tests for calling tor_sscanf() 13939 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha. 13940 13941 o Minor bugfixes (controller): 13942 - Do not crash when receiving a HSPOST command with an empty body. 13943 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha. 13944 - Do not crash when receiving a POSTDESCRIPTOR command with an empty 13945 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha. 13946 13947 o Minor bugfixes (relay): 13948 - Inform the geoip and rephist modules about all requests, even on 13949 relays that are only fetching microdescriptors. Fixes a bug 13950 related to 21585; bugfix on 0.3.0.1-alpha. 13951 13952 o Minor bugfixes (unit tests): 13953 - Fix a channelpadding unit test failure on slow systems by using 13954 mocked time instead of actual time. Fixes bug 23077; bugfix 13955 on 0.3.1.1-alpha. 13956 13957 13958Changes in version 0.3.1.6-rc - 2017-09-05 13959 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1 13960 release series, including a bug that produced weird behavior on 13961 Windows directory caches. 13962 13963 This is the first release candidate in the Tor 0.3.1 series. If we 13964 find no new bugs or regressions here, the first stable 0.3.1 release 13965 will be nearly identical to it. 13966 13967 o Major bugfixes (windows, directory cache): 13968 - On Windows, do not try to delete cached consensus documents and 13969 diffs before they are unmapped from memory--Windows won't allow 13970 that. Instead, allow the consensus cache directory to grow larger, 13971 to hold files that might need to stay around longer. Fixes bug 13972 22752; bugfix on 0.3.1.1-alpha. 13973 13974 o Minor features (directory authority): 13975 - Improve the message that authorities report to relays that present 13976 RSA/Ed25519 keypairs that conflict with previously pinned keys. 13977 Closes ticket 22348. 13978 13979 o Minor features (geoip): 13980 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2 13981 Country database. 13982 13983 o Minor features (testing): 13984 - Add more tests for compression backend initialization. Closes 13985 ticket 22286. 13986 13987 o Minor bugfixes (directory cache): 13988 - Fix a memory leak when recovering space in the consensus cache. 13989 Fixes bug 23139; bugfix on 0.3.1.1-alpha. 13990 13991 o Minor bugfixes (hidden service): 13992 - Increase the number of circuits that a service is allowed to 13993 open over a specific period of time. The value was lower than it 13994 should be (8 vs 12) in the normal case of 3 introduction points. 13995 Fixes bug 22159; bugfix on 0.3.0.5-rc. 13996 - Fix a BUG warning during HSv3 descriptor decoding that could be 13997 cause by a specially crafted descriptor. Fixes bug 23233; bugfix 13998 on 0.3.0.1-alpha. Bug found by "haxxpop". 13999 - Rate-limit the log messages if we exceed the maximum number of 14000 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha. 14001 14002 o Minor bugfixes (logging, relay): 14003 - Remove a forgotten debugging message when an introduction point 14004 successfully establishes a hidden service prop224 circuit with 14005 a client. 14006 - Change three other log_warn() for an introduction point to 14007 protocol warnings, because they can be failure from the network 14008 and are not relevant to the operator. Fixes bug 23078; bugfix on 14009 0.3.0.1-alpha and 0.3.0.2-alpha. 14010 14011 o Minor bugfixes (relay): 14012 - When a relay is not running as a directory cache, it will no 14013 longer generate compressed consensuses and consensus diff 14014 information. Previously, this was a waste of disk and CPU. Fixes 14015 bug 23275; bugfix on 0.3.1.1-alpha. 14016 14017 o Minor bugfixes (robustness, error handling): 14018 - Improve our handling of the cases where OpenSSL encounters a 14019 memory error while encoding keys and certificates. We haven't 14020 observed these errors in the wild, but if they do happen, we now 14021 detect and respond better. Fixes bug 19418; bugfix on all versions 14022 of Tor. Reported by Guido Vranken. 14023 14024 o Minor bugfixes (stability): 14025 - Avoid crashing on a double-free when unable to load or process an 14026 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found 14027 with the clang static analyzer. 14028 14029 o Minor bugfixes (testing): 14030 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291; 14031 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij. 14032 - Port the hs_ntor handshake test to work correctly with recent 14033 versions of the pysha3 module. Fixes bug 23071; bugfix 14034 on 0.3.1.1-alpha. 14035 14036 o Minor bugfixes (Windows service): 14037 - When running as a Windows service, set the ID of the main thread 14038 correctly. Failure to do so made us fail to send log messages to 14039 the controller in 0.2.1.16-rc, slowed down controller event 14040 delivery in 0.2.7.3-rc and later, and crash with an assertion 14041 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha. 14042 Patch and diagnosis from "Vort". 14043 14044 14045Changes in version 0.3.0.10 - 2017-08-02 14046 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes 14047 from the current Tor alpha series. OpenBSD users and TPROXY users 14048 should upgrade; others are probably okay sticking with 0.3.0.9. 14049 14050 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha): 14051 - Tor's repository now includes a Travis Continuous Integration (CI) 14052 configuration file (.travis.yml). This is meant to help new 14053 developers and contributors who fork Tor to a Github repository be 14054 better able to test their changes, and understand what we expect 14055 to pass. To use this new build feature, you must fork Tor to your 14056 Github account, then go into the "Integrations" menu in the 14057 repository settings for your fork and enable Travis, then push 14058 your changes. Closes ticket 22636. 14059 14060 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha): 14061 - Fix a typo that had prevented TPROXY-based transparent proxying 14062 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha. 14063 Patch from "d4fq0fQAgoJ". 14064 14065 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha): 14066 - Avoid an assertion failure bug affecting our implementation of 14067 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() 14068 handling of "0xbar" differs from what we had expected. Fixes bug 14069 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. 14070 14071 o Minor features (backport from 0.3.1.5-alpha): 14072 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2 14073 Country database. 14074 14075 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha): 14076 - Roll over monthly accounting at the configured hour and minute, 14077 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1. 14078 Found by Andrey Karpov with PVS-Studio. 14079 14080 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha): 14081 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915; 14082 bugfix on 0.2.8.1-alpha. 14083 - Fix warnings when building with libscrypt and openssl scrypt 14084 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. 14085 - When building with certain versions of the mingw C header files, 14086 avoid float-conversion warnings when calling the C functions 14087 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix 14088 on 0.2.8.1-alpha. 14089 14090 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha): 14091 - Backport a fix for an "unused variable" warning that appeared 14092 in some versions of mingw. Fixes bug 22838; bugfix on 14093 0.2.8.1-alpha. 14094 14095 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha): 14096 - Avoid Coverity build warnings related to our BUG() macro. By 14097 default, Coverity treats BUG() as the Linux kernel does: an 14098 instant abort(). We need to override that so our BUG() macro 14099 doesn't prevent Coverity from analyzing functions that use it. 14100 Fixes bug 23030; bugfix on 0.2.9.1-alpha. 14101 14102 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha): 14103 - When rejecting a router descriptor for running an obsolete version 14104 of Tor without ntor support, warn about the obsolete tor version, 14105 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha. 14106 14107 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha): 14108 - Avoid a sandbox failure when trying to re-bind to a socket and 14109 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. 14110 14111 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha) 14112 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test. 14113 Fixes bug 22803; bugfix on 0.3.0.1-alpha. 14114 14115 14116Changes in version 0.3.1.5-alpha - 2017-08-01 14117 Tor 0.3.1.5-alpha improves the performance of consensus diff 14118 calculation, fixes a crash bug on older versions of OpenBSD, and fixes 14119 several other bugs. If no serious bugs are found in this version, the 14120 next version will be a release candidate. 14121 14122 This release also marks the end of support for the Tor 0.2.4.x, 14123 0.2.6.x, and 0.2.7.x release series. Those releases will receive no 14124 further bug or security fixes. Anyone still running or distributing 14125 one of those versions should upgrade. 14126 14127 o Major features (build system, continuous integration): 14128 - Tor's repository now includes a Travis Continuous Integration (CI) 14129 configuration file (.travis.yml). This is meant to help new 14130 developers and contributors who fork Tor to a Github repository be 14131 better able to test their changes, and understand what we expect 14132 to pass. To use this new build feature, you must fork Tor to your 14133 Github account, then go into the "Integrations" menu in the 14134 repository settings for your fork and enable Travis, then push 14135 your changes. Closes ticket 22636. 14136 14137 o Major bugfixes (openbsd, denial-of-service): 14138 - Avoid an assertion failure bug affecting our implementation of 14139 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol() 14140 handling of "0xbar" differs from what we had expected. Fixes bug 14141 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007. 14142 14143 o Major bugfixes (relay, performance): 14144 - Perform circuit handshake operations at a higher priority than we 14145 use for consensus diff creation and compression. This should 14146 prevent circuits from starving when a relay or bridge receives a 14147 new consensus, especially on lower-powered machines. Fixes bug 14148 22883; bugfix on 0.3.1.1-alpha. 14149 14150 o Minor features (bridge authority): 14151 - Add "fingerprint" lines to the networkstatus-bridges file produced 14152 by bridge authorities. Closes ticket 22207. 14153 14154 o Minor features (directory cache, consensus diff): 14155 - Add a new MaxConsensusAgeForDiffs option to allow directory cache 14156 operators with low-resource environments to adjust the number of 14157 consensuses they'll store and generate diffs from. Most cache 14158 operators should leave it unchanged. Helps to work around 14159 bug 22883. 14160 14161 o Minor features (geoip): 14162 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2 14163 Country database. 14164 14165 o Minor features (relay, performance): 14166 - Always start relays with at least two worker threads, to prevent 14167 priority inversion on slow tasks. Part of the fix for bug 22883. 14168 - Allow background work to be queued with different priorities, so 14169 that a big pile of slow low-priority jobs will not starve out 14170 higher priority jobs. This lays the groundwork for a fix for 14171 bug 22883. 14172 14173 o Minor bugfixes (build system, rust): 14174 - Fix a problem where Rust toolchains were not being found when 14175 building without --enable-cargo-online-mode, due to setting the 14176 $HOME environment variable instead of $CARGO_HOME. Fixes bug 14177 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo. 14178 14179 o Minor bugfixes (compatibility, zstd): 14180 - Write zstd epilogues correctly when the epilogue requires 14181 reallocation of the output buffer, even with zstd 1.3.0. 14182 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug 14183 22927; bugfix on 0.3.1.1-alpha. 14184 14185 o Minor bugfixes (compilation warnings): 14186 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 14187 22915; bugfix on 0.2.8.1-alpha. 14188 - Fix warnings when building with libscrypt and openssl scrypt 14189 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha. 14190 - Compile correctly when both openssl 1.1.0 and libscrypt are 14191 detected. Previously this would cause an error. Fixes bug 22892; 14192 bugfix on 0.3.1.1-alpha. 14193 - When building with certain versions of the mingw C header files, 14194 avoid float-conversion warnings when calling the C functions 14195 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix 14196 on 0.2.8.1-alpha. 14197 14198 o Minor bugfixes (coverity build support): 14199 - Avoid Coverity build warnings related to our BUG() macro. By 14200 default, Coverity treats BUG() as the Linux kernel does: an 14201 instant abort(). We need to override that so our BUG() macro 14202 doesn't prevent Coverity from analyzing functions that use it. 14203 Fixes bug 23030; bugfix on 0.2.9.1-alpha. 14204 14205 o Minor bugfixes (directory authority): 14206 - When a directory authority rejects a descriptor or extrainfo with 14207 a given digest, mark that digest as undownloadable, so that we do 14208 not attempt to download it again over and over. We previously 14209 tried to avoid downloading such descriptors by other means, but we 14210 didn't notice if we accidentally downloaded one anyway. This 14211 behavior became problematic in 0.2.7.2-alpha, when authorities 14212 began pinning Ed25519 keys. Fixes bug 22349; bugfix 14213 on 0.2.1.19-alpha. 14214 14215 o Minor bugfixes (error reporting, windows): 14216 - When formatting Windows error messages, use the English format to 14217 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha. 14218 Patch from "Vort". 14219 14220 o Minor bugfixes (file limits, osx): 14221 - When setting the maximum number of connections allowed by the OS, 14222 always allow some extra file descriptors for other files. Fixes 14223 bug 22797; bugfix on 0.2.0.10-alpha. 14224 14225 o Minor bugfixes (linux seccomp2 sandbox): 14226 - Avoid a sandbox failure when trying to re-bind to a socket and 14227 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha. 14228 14229 o Minor bugfixes (memory leaks): 14230 - Fix a small memory leak when validating a configuration that uses 14231 two or more AF_UNIX sockets for the same port type. Fixes bug 14232 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725. 14233 14234 o Minor bugfixes (unit tests): 14235 - test_consdiff_base64cmp would fail on OS X because while OS X 14236 follows the standard of (less than zero/zero/greater than zero), 14237 it doesn't follow the convention of (-1/0/+1). Make the test 14238 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha. 14239 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test. 14240 Fixes bug 22803; bugfix on 0.3.0.1-alpha. 14241 14242 14243Changes in version 0.3.1.4-alpha - 2017-06-29 14244 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client 14245 to use a guard that was in the same network family as a chosen exit 14246 relay. This is a security regression; all clients running earlier 14247 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 14248 or 0.3.1.4-alpha. 14249 14250 This release also fixes several other bugs introduced in 0.3.0.x 14251 and 0.3.1.x, including others that can affect bandwidth usage 14252 and correctness. 14253 14254 o New dependencies: 14255 - To build with zstd and lzma support, Tor now requires the 14256 pkg-config tool at build time. (This requirement was new in 14257 0.3.1.1-alpha, but was not noted at the time. Noting it here to 14258 close ticket 22623.) 14259 14260 o Major bugfixes (path selection, security): 14261 - When choosing which guard to use for a circuit, avoid the exit's 14262 family along with the exit itself. Previously, the new guard 14263 selection logic avoided the exit, but did not consider its family. 14264 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017- 14265 006 and CVE-2017-0377. 14266 14267 o Major bugfixes (compression, zstd): 14268 - Correctly detect a full buffer when decompressing a large zstd- 14269 compressed input. Previously, we would sometimes treat a full 14270 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha. 14271 14272 o Major bugfixes (directory protocol): 14273 - Ensure that we send "304 Not modified" as HTTP status code when a 14274 client is attempting to fetch a consensus or consensus diff, and 14275 the best one we can send them is one they already have. Fixes bug 14276 22702; bugfix on 0.3.1.1-alpha. 14277 14278 o Major bugfixes (entry guards): 14279 - When starting with an old consensus, do not add new entry guards 14280 unless the consensus is "reasonably live" (under 1 day old). Fixes 14281 one root cause of bug 22400; bugfix on 0.3.0.1-alpha. 14282 14283 o Minor features (bug mitigation, diagnostics, logging): 14284 - Avoid an assertion failure, and log a better error message, when 14285 unable to remove a file from the consensus cache on Windows. 14286 Attempts to mitigate and diagnose bug 22752. 14287 14288 o Minor features (geoip): 14289 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2 14290 Country database. 14291 14292 o Minor bugfixes (compression): 14293 - When compressing or decompressing a buffer, check for a failure to 14294 create a compression object. Fixes bug 22626; bugfix 14295 on 0.3.1.1-alpha. 14296 - When decompressing a buffer, check for extra data after the end of 14297 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha. 14298 - When decompressing an object received over an anonymous directory 14299 connection, if we have already decompressed it using an acceptable 14300 compression method, do not reject it for looking like an 14301 unacceptable compression method. Fixes part of bug 22670; bugfix 14302 on 0.3.1.1-alpha. 14303 - When serving directory votes compressed with zlib, do not claim to 14304 have compressed them with zstd. Fixes bug 22669; bugfix 14305 on 0.3.1.1-alpha. 14306 - When spooling compressed data to an output buffer, don't try to 14307 spool more data when there is no more data to spool and we are not 14308 trying to flush the input. Previously, we would sometimes launch 14309 compression requests with nothing to do, which interferes with our 14310 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha. 14311 14312 o Minor bugfixes (defensive programming): 14313 - Detect and break out of infinite loops in our compression code. We 14314 don't think that any such loops exist now, but it's best to be 14315 safe. Closes ticket 22672. 14316 - Fix a memset() off the end of an array when packing cells. This 14317 bug should be harmless in practice, since the corrupted bytes are 14318 still in the same structure, and are always padding bytes, 14319 ignored, or immediately overwritten, depending on compiler 14320 behavior. Nevertheless, because the memset()'s purpose is to make 14321 sure that any other cell-handling bugs can't expose bytes to the 14322 network, we need to fix it. Fixes bug 22737; bugfix on 14323 0.2.4.11-alpha. Fixes CID 1401591. 14324 14325 o Minor bugfixes (linux seccomp2 sandbox): 14326 - Permit the fchmod system call, to avoid crashing on startup when 14327 starting with the seccomp2 sandbox and an unexpected set of 14328 permissions on the data directory or its contents. Fixes bug 14329 22516; bugfix on 0.2.5.4-alpha. 14330 - Fix a crash in the LZMA module, when the sandbox was enabled, and 14331 liblzma would allocate more than 16 MB of memory. We solve this by 14332 bumping the mprotect() limit in the sandbox module from 16 MB to 14333 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha. 14334 14335 o Minor bugfixes (logging): 14336 - When decompressing, do not warn if we fail to decompress using a 14337 compression method that we merely guessed. Fixes part of bug 14338 22670; bugfix on 0.1.1.14-alpha. 14339 - When decompressing, treat mismatch between content-encoding and 14340 actual compression type as a protocol warning. Fixes part of bug 14341 22670; bugfix on 0.1.1.9-alpha. 14342 - Downgrade "assigned_to_cpuworker failed" message to info-level 14343 severity. In every case that can reach it, either a better warning 14344 has already been logged, or no warning is warranted. Fixes bug 14345 22356; bugfix on 0.2.6.3-alpha. 14346 - Demote a warn that was caused by libevent delays to info if 14347 netflow padding is less than 4.5 seconds late, or to notice 14348 if it is more (4.5 seconds is the amount of time that a netflow 14349 record might be emitted after, if we chose the maximum timeout). 14350 Fixes bug 22212; bugfix on 0.3.1.1-alpha. 14351 14352 o Minor bugfixes (process behavior): 14353 - When exiting because of an error, always exit with a nonzero exit 14354 status. Previously, we would fail to report an error in our exit 14355 status in cases related to __OwningControllerProcess failure, 14356 lockfile contention, and Ed25519 key initialization. Fixes bug 14357 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and 14358 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch 14359 from "huyvq". 14360 14361 o Documentation: 14362 - Add a manpage description for the key-pinning-journal file. Closes 14363 ticket 22347. 14364 - Correctly note that bandwidth accounting values are stored in the 14365 state file, and the bw_accounting file is now obsolete. Closes 14366 ticket 16082. 14367 - Document more of the files in the Tor data directory, including 14368 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats, 14369 approved-routers, sr-random, and diff-cache. Found while fixing 14370 ticket 22347. 14371 14372 14373Changes in version 0.3.0.9 - 2017-06-29 14374 Tor 0.3.0.9 fixes a path selection bug that would allow a client 14375 to use a guard that was in the same network family as a chosen exit 14376 relay. This is a security regression; all clients running earlier 14377 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or 14378 0.3.1.4-alpha. 14379 14380 This release also backports several other bugfixes from the 0.3.1.x 14381 series. 14382 14383 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha): 14384 - When choosing which guard to use for a circuit, avoid the exit's 14385 family along with the exit itself. Previously, the new guard 14386 selection logic avoided the exit, but did not consider its family. 14387 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017- 14388 006 and CVE-2017-0377. 14389 14390 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha): 14391 - Don't block bootstrapping when a primary bridge is offline and we 14392 can't get its descriptor. Fixes bug 22325; fixes one case of bug 14393 21969; bugfix on 0.3.0.3-alpha. 14394 14395 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha): 14396 - When starting with an old consensus, do not add new entry guards 14397 unless the consensus is "reasonably live" (under 1 day old). Fixes 14398 one root cause of bug 22400; bugfix on 0.3.0.1-alpha. 14399 14400 o Minor features (geoip): 14401 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2 14402 Country database. 14403 14404 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha): 14405 - Reject version numbers with non-numeric prefixes (such as +, -, or 14406 whitespace). Disallowing whitespace prevents differential version 14407 parsing between POSIX-based and Windows platforms. Fixes bug 21507 14408 and part of 21508; bugfix on 0.0.8pre1. 14409 14410 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha): 14411 - Permit the fchmod system call, to avoid crashing on startup when 14412 starting with the seccomp2 sandbox and an unexpected set of 14413 permissions on the data directory or its contents. Fixes bug 14414 22516; bugfix on 0.2.5.4-alpha. 14415 14416 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha): 14417 - Fix a memset() off the end of an array when packing cells. This 14418 bug should be harmless in practice, since the corrupted bytes are 14419 still in the same structure, and are always padding bytes, 14420 ignored, or immediately overwritten, depending on compiler 14421 behavior. Nevertheless, because the memset()'s purpose is to make 14422 sure that any other cell-handling bugs can't expose bytes to the 14423 network, we need to fix it. Fixes bug 22737; bugfix on 14424 0.2.4.11-alpha. Fixes CID 1401591. 14425 14426 14427Changes in version 0.3.1.3-alpha - 2017-06-08 14428 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to 14429 remotely crash a hidden service with an assertion failure. Anyone 14430 running a hidden service should upgrade to this version, or to some 14431 other version with fixes for TROVE-2017-004 and TROVE-2017-005. 14432 14433 Tor 0.3.1.3-alpha also includes fixes for several key management bugs 14434 that sometimes made relays unreliable, as well as several other 14435 bugfixes described below. 14436 14437 o Major bugfixes (hidden service, relay, security): 14438 - Fix a remotely triggerable assertion failure when a hidden service 14439 handles a malformed BEGIN cell. Fixes bug 22493, tracked as 14440 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha. 14441 - Fix a remotely triggerable assertion failure caused by receiving a 14442 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14443 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14444 on 0.2.2.1-alpha. 14445 14446 o Major bugfixes (relay, link handshake): 14447 - When performing the v3 link handshake on a TLS connection, report 14448 that we have the x509 certificate that we actually used on that 14449 connection, even if we have changed certificates since that 14450 connection was first opened. Previously, we would claim to have 14451 used our most recent x509 link certificate, which would sometimes 14452 make the link handshake fail. Fixes one case of bug 22460; bugfix 14453 on 0.2.3.6-alpha. 14454 14455 o Major bugfixes (relays, key management): 14456 - Regenerate link and authentication certificates whenever the key 14457 that signs them changes; also, regenerate link certificates 14458 whenever the signed key changes. Previously, these processes were 14459 only weakly coupled, and we relays could (for minutes to hours) 14460 wind up with an inconsistent set of keys and certificates, which 14461 other relays would not accept. Fixes two cases of bug 22460; 14462 bugfix on 0.3.0.1-alpha. 14463 - When sending an Ed25519 signing->link certificate in a CERTS cell, 14464 send the certificate that matches the x509 certificate that we 14465 used on the TLS connection. Previously, there was a race condition 14466 if the TLS context rotated after we began the TLS handshake but 14467 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix 14468 on 0.3.0.1-alpha. 14469 14470 o Major bugfixes (torrc, crash): 14471 - Fix a crash bug when using %include in torrc. Fixes bug 22417; 14472 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto. 14473 14474 o Minor features (code style): 14475 - Add "Falls through" comments to our codebase, in order to silence 14476 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas 14477 Stieger. Closes ticket 22446. 14478 14479 o Minor features (diagnostic): 14480 - Add logging messages to try to diagnose a rare bug that seems to 14481 generate RSA->Ed25519 cross-certificates dated in the 1970s. We 14482 think this is happening because of incorrect system clocks, but 14483 we'd like to know for certain. Diagnostic for bug 22466. 14484 14485 o Minor bugfixes (correctness): 14486 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14487 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14488 14489 o Minor bugfixes (directory protocol): 14490 - Check for libzstd >= 1.1, because older versions lack the 14491 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha. 14492 14493 o Minor bugfixes (link handshake): 14494 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six 14495 months, and regenerate it when it is within one month of expiring. 14496 Previously, we had generated this certificate at startup with a 14497 ten-year lifetime, but that could lead to weird behavior when Tor 14498 was started with a grossly inaccurate clock. Mitigates bug 22466; 14499 mitigation on 0.3.0.1-alpha. 14500 14501 o Minor bugfixes (storage directories): 14502 - Always check for underflows in the cached storage directory usage. 14503 If the usage does underflow, re-calculate it. Also, avoid a 14504 separate underflow when the usage is not known. Fixes bug 22424; 14505 bugfix on 0.3.1.1-alpha. 14506 14507 o Minor bugfixes (unit tests): 14508 - The unit tests now pass on systems where localhost is misconfigured 14509 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix 14510 on 0.0.9pre2. 14511 14512 o Documentation: 14513 - Clarify the manpage for the (deprecated) torify script. Closes 14514 ticket 6892. 14515 14516Changes in version 0.3.0.8 - 2017-06-08 14517 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to 14518 remotely crash a hidden service with an assertion failure. Anyone 14519 running a hidden service should upgrade to this version, or to some 14520 other version with fixes for TROVE-2017-004 and TROVE-2017-005. 14521 14522 Tor 0.3.0.8 also includes fixes for several key management bugs 14523 that sometimes made relays unreliable, as well as several other 14524 bugfixes described below. 14525 14526 o Major bugfixes (hidden service, relay, security, backport 14527 from 0.3.1.3-alpha): 14528 - Fix a remotely triggerable assertion failure when a hidden service 14529 handles a malformed BEGIN cell. Fixes bug 22493, tracked as 14530 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha. 14531 - Fix a remotely triggerable assertion failure caused by receiving a 14532 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14533 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14534 on 0.2.2.1-alpha. 14535 14536 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha): 14537 - When performing the v3 link handshake on a TLS connection, report 14538 that we have the x509 certificate that we actually used on that 14539 connection, even if we have changed certificates since that 14540 connection was first opened. Previously, we would claim to have 14541 used our most recent x509 link certificate, which would sometimes 14542 make the link handshake fail. Fixes one case of bug 22460; bugfix 14543 on 0.2.3.6-alpha. 14544 14545 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha): 14546 - Regenerate link and authentication certificates whenever the key 14547 that signs them changes; also, regenerate link certificates 14548 whenever the signed key changes. Previously, these processes were 14549 only weakly coupled, and we relays could (for minutes to hours) 14550 wind up with an inconsistent set of keys and certificates, which 14551 other relays would not accept. Fixes two cases of bug 22460; 14552 bugfix on 0.3.0.1-alpha. 14553 - When sending an Ed25519 signing->link certificate in a CERTS cell, 14554 send the certificate that matches the x509 certificate that we 14555 used on the TLS connection. Previously, there was a race condition 14556 if the TLS context rotated after we began the TLS handshake but 14557 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix 14558 on 0.3.0.1-alpha. 14559 14560 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha): 14561 - Stop rejecting v3 hidden service descriptors because their size 14562 did not match an old padding rule. Fixes bug 22447; bugfix on 14563 0.3.0.1-alpha. 14564 14565 o Minor features (fallback directory list, backport from 0.3.1.3-alpha): 14566 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in 14567 December 2016 (of which ~126 were still functional) with a list of 14568 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May 14569 2017. Resolves ticket 21564. 14570 14571 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha): 14572 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes 14573 bug 22252; bugfix on 0.2.9.3-alpha. 14574 14575 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha): 14576 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14577 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14578 14579 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha): 14580 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six 14581 months, and regenerate it when it is within one month of expiring. 14582 Previously, we had generated this certificate at startup with a 14583 ten-year lifetime, but that could lead to weird behavior when Tor 14584 was started with a grossly inaccurate clock. Mitigates bug 22466; 14585 mitigation on 0.3.0.1-alpha. 14586 14587 o Minor bugfixes (memory leak, directory authority, backport from 14588 0.3.1.2-alpha): 14589 - When directory authorities reject a router descriptor due to 14590 keypinning, free the router descriptor rather than leaking the 14591 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha. 14592 14593 14594Changes in version 0.2.9.11 - 2017-06-08 14595 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to 14596 remotely crash a hidden service with an assertion failure. Anyone 14597 running a hidden service should upgrade to this version, or to some 14598 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14599 are not affected by TROVE-2017-004.) 14600 14601 Tor 0.2.9.11 also backports fixes for several key management bugs 14602 that sometimes made relays unreliable, as well as several other 14603 bugfixes described below. 14604 14605 o Major bugfixes (hidden service, relay, security, backport 14606 from 0.3.1.3-alpha): 14607 - Fix a remotely triggerable assertion failure caused by receiving a 14608 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14609 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14610 on 0.2.2.1-alpha. 14611 14612 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha): 14613 - When performing the v3 link handshake on a TLS connection, report 14614 that we have the x509 certificate that we actually used on that 14615 connection, even if we have changed certificates since that 14616 connection was first opened. Previously, we would claim to have 14617 used our most recent x509 link certificate, which would sometimes 14618 make the link handshake fail. Fixes one case of bug 22460; bugfix 14619 on 0.2.3.6-alpha. 14620 14621 o Minor features (fallback directory list, backport from 0.3.1.3-alpha): 14622 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in 14623 December 2016 (of which ~126 were still functional) with a list of 14624 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May 14625 2017. Resolves ticket 21564. 14626 14627 o Minor features (future-proofing, backport from 0.3.0.7): 14628 - Tor no longer refuses to download microdescriptors or descriptors if 14629 they are listed as "published in the future". This change will 14630 eventually allow us to stop listing meaningful "published" dates 14631 in microdescriptor consensuses, and thereby allow us to reduce the 14632 resources required to download consensus diffs by over 50%. 14633 Implements part of ticket 21642; implements part of proposal 275. 14634 14635 o Minor features (directory authorities, backport from 0.3.0.4-rc) 14636 - Directory authorities now reject relays running versions 14637 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays 14638 suffer from bug 20499 and don't keep their consensus cache 14639 up-to-date. Resolves ticket 20509. 14640 14641 o Minor features (geoip): 14642 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14643 Country database. 14644 14645 o Minor bugfixes (control port, backport from 0.3.0.6): 14646 - The GETINFO extra-info/digest/<digest> command was broken because 14647 of a wrong base16 decode return value check, introduced when 14648 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha. 14649 14650 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha): 14651 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14652 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14653 14654 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7): 14655 - The getpid() system call is now permitted under the Linux seccomp2 14656 sandbox, to avoid crashing with versions of OpenSSL (and other 14657 libraries) that attempt to learn the process's PID by using the 14658 syscall rather than the VDSO code. Fixes bug 21943; bugfix 14659 on 0.2.5.1-alpha. 14660 14661 o Minor bugfixes (memory leak, directory authority, backport 14662 from 0.3.1.2-alpha): 14663 - When directory authorities reject a router descriptor due to 14664 keypinning, free the router descriptor rather than leaking the 14665 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha. 14666 14667Changes in version 0.2.8.14 - 2017-06-08 14668 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to 14669 remotely crash a hidden service with an assertion failure. Anyone 14670 running a hidden service should upgrade to this version, or to some 14671 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14672 are not affected by TROVE-2017-004.) 14673 14674 o Major bugfixes (hidden service, relay, security): 14675 - Fix a remotely triggerable assertion failure caused by receiving a 14676 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14677 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14678 on 0.2.2.1-alpha. 14679 14680 o Minor features (geoip): 14681 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14682 Country database. 14683 14684 o Minor features (fallback directory list, backport from 0.3.1.3-alpha): 14685 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in 14686 December 2016 (of which ~126 were still functional) with a list of 14687 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May 14688 2017. Resolves ticket 21564. 14689 14690 o Minor bugfixes (correctness): 14691 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14692 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14693 14694Changes in version 0.2.7.8 - 2017-06-08 14695 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to 14696 remotely crash a hidden service with an assertion failure. Anyone 14697 running a hidden service should upgrade to this version, or to some 14698 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14699 are not affected by TROVE-2017-004.) 14700 14701 o Major bugfixes (hidden service, relay, security): 14702 - Fix a remotely triggerable assertion failure caused by receiving a 14703 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14704 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14705 on 0.2.2.1-alpha. 14706 14707 o Minor features (geoip): 14708 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14709 Country database. 14710 14711 o Minor bugfixes (correctness): 14712 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14713 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14714 14715 14716Changes in version 0.2.6.12 - 2017-06-08 14717 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to 14718 remotely crash a hidden service with an assertion failure. Anyone 14719 running a hidden service should upgrade to this version, or to some 14720 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14721 are not affected by TROVE-2017-004.) 14722 14723 o Major bugfixes (hidden service, relay, security): 14724 - Fix a remotely triggerable assertion failure caused by receiving a 14725 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14726 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14727 on 0.2.2.1-alpha. 14728 14729 o Minor features (geoip): 14730 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14731 Country database. 14732 14733 o Minor bugfixes (correctness): 14734 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14735 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14736 14737Changes in version 0.2.5.14 - 2017-06-08 14738 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to 14739 remotely crash a hidden service with an assertion failure. Anyone 14740 running a hidden service should upgrade to this version, or to some 14741 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14742 are not affected by TROVE-2017-004.) 14743 14744 o Major bugfixes (hidden service, relay, security): 14745 - Fix a remotely triggerable assertion failure caused by receiving a 14746 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14747 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14748 on 0.2.2.1-alpha. 14749 14750 o Minor features (geoip): 14751 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14752 Country database. 14753 14754 o Minor bugfixes (correctness): 14755 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14756 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14757 14758Changes in version 0.2.4.29 - 2017-06-08 14759 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to 14760 remotely crash a hidden service with an assertion failure. Anyone 14761 running a hidden service should upgrade to this version, or to some 14762 other version with fixes for TROVE-2017-005. (Versions before 0.3.0 14763 are not affected by TROVE-2017-004.) 14764 14765 o Major bugfixes (hidden service, relay, security): 14766 - Fix a remotely triggerable assertion failure caused by receiving a 14767 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug 14768 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix 14769 on 0.2.2.1-alpha. 14770 14771 o Minor features (geoip): 14772 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 14773 Country database. 14774 14775 o Minor bugfixes (correctness): 14776 - Avoid undefined behavior when parsing IPv6 entries from the geoip6 14777 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha. 14778 14779 14780Changes in version 0.3.1.2-alpha - 2017-05-26 14781 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It 14782 fixes a few bugs found while testing 0.3.1.1-alpha, including a 14783 memory corruption bug that affected relay stability. 14784 14785 o Major bugfixes (crash, relay): 14786 - Fix a memory-corruption bug in relays that set MyFamily. 14787 Previously, they would double-free MyFamily elements when making 14788 the next descriptor or when changing their configuration. Fixes 14789 bug 22368; bugfix on 0.3.1.1-alpha. 14790 14791 o Minor bugfixes (logging): 14792 - Log a better message when a directory authority replies to an 14793 upload with an unexpected status code. Fixes bug 11121; bugfix 14794 on 0.1.0.1-rc. 14795 14796 o Minor bugfixes (memory leak, directory authority): 14797 - When directory authorities reject a router descriptor due to 14798 keypinning, free the router descriptor rather than leaking the 14799 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha. 14800 14801 14802Changes in version 0.3.1.1-alpha - 2017-05-22 14803 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It 14804 reduces the bandwidth usage for Tor's directory protocol, adds some 14805 basic padding to resist netflow-based traffic analysis and to serve as 14806 the basis of other padding in the future, and adds rust support to the 14807 build system. 14808 14809 It also contains numerous other small features and improvements to 14810 security, correctness, and performance. 14811 14812 Below are the changes since 0.3.0.7. 14813 14814 o Major features (directory protocol): 14815 - Tor relays and authorities can now serve clients an abbreviated 14816 version of the consensus document, containing only the changes 14817 since an older consensus document that the client holds. Clients 14818 now request these documents when available. When both client and 14819 server use this new protocol, they will use far less bandwidth (up 14820 to 94% less) to keep the client's consensus up-to-date. Implements 14821 proposal 140; closes ticket 13339. Based on work by Daniel Martí. 14822 - Tor can now compress directory traffic with lzma or with zstd 14823 compression algorithms, which can deliver better bandwidth 14824 performance. Because lzma is computationally expensive, it's only 14825 used for documents that can be compressed once and served many 14826 times. Support for these algorithms requires that tor is built 14827 with the libzstd and/or liblzma libraries available. Implements 14828 proposal 278; closes ticket 21662. 14829 - Relays now perform the more expensive compression operations, and 14830 consensus diff generation, in worker threads. This separation 14831 avoids delaying the main thread when a new consensus arrives. 14832 14833 o Major features (experimental): 14834 - Tor can now build modules written in Rust. To turn this on, pass 14835 the "--enable-rust" flag to the configure script. It's not time to 14836 get excited yet: currently, there is no actual Rust functionality 14837 beyond some simple glue code, and a notice at startup to tell you 14838 that Rust is running. Still, we hope that programmers and 14839 packagers will try building Tor with Rust support, so that we can 14840 find issues and solve portability problems. Closes ticket 22106. 14841 14842 o Major features (traffic analysis resistance): 14843 - Connections between clients and relays now send a padding cell in 14844 each direction every 1.5 to 9.5 seconds (tunable via consensus 14845 parameters). This padding will not resist specialized 14846 eavesdroppers, but it should be enough to make many ISPs' routine 14847 network flow logging less useful in traffic analysis against 14848 Tor users. 14849 14850 Padding is negotiated using Tor's link protocol, so both relays 14851 and clients must upgrade for this to take effect. Clients may 14852 still send padding despite the relay's version by setting 14853 ConnectionPadding 1 in torrc, and may disable padding by setting 14854 ConnectionPadding 0 in torrc. Padding may be minimized for mobile 14855 users with the torrc option ReducedConnectionPadding. Implements 14856 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861. 14857 - Relays will publish 24 hour totals of padding and non-padding cell 14858 counts to their extra-info descriptors, unless PaddingStatistics 0 14859 is set in torrc. These 24 hour totals are also rounded to 14860 multiples of 10000. 14861 14862 o Major bugfixes (connection usage): 14863 - We use NETINFO cells to try to determine if both relays involved 14864 in a connection will agree on the canonical status of that 14865 connection. We prefer the connections where this is the case for 14866 extend cells, and try to close connections where relays disagree 14867 on their canonical status early. Also, we now prefer the oldest 14868 valid connection for extend cells. These two changes should reduce 14869 the number of long-term connections that are kept open between 14870 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha. 14871 - Relays now log hourly statistics (look for 14872 "channel_check_for_duplicates" lines) on the total number of 14873 connections to other relays. If the number of connections per 14874 relay is unexpectedly large, this log message is at notice level. 14875 Otherwise it is at info. 14876 14877 o Major bugfixes (entry guards): 14878 - Don't block bootstrapping when a primary bridge is offline and we 14879 can't get its descriptor. Fixes bug 22325; fixes one case of bug 14880 21969; bugfix on 0.3.0.3-alpha. 14881 14882 o Major bugfixes (linux TPROXY support): 14883 - Fix a typo that had prevented TPROXY-based transparent proxying 14884 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha. 14885 Patch from "d4fq0fQAgoJ". 14886 14887 o Minor features (security, windows): 14888 - Enable a couple of pieces of Windows hardening: one 14889 (HeapEnableTerminationOnCorruption) that has been on-by-default 14890 since Windows 8, and unavailable before Windows 7; and one 14891 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't 14892 affect us, but shouldn't do any harm. Closes ticket 21953. 14893 14894 o Minor features (config options): 14895 - Allow "%include" directives in torrc configuration files. These 14896 directives import the settings from other files, or from all the 14897 files in a directory. Closes ticket 1922. Code by Daniel Pinto. 14898 - Make SAVECONF return an error when overwriting a torrc that has 14899 includes. Using SAVECONF with the FORCE option will allow it to 14900 overwrite torrc even if includes are used. Related to ticket 1922. 14901 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF 14902 will work without the FORCE option. Related to ticket 1922. 14903 14904 o Minor features (controller): 14905 - Warn the first time that a controller requests data in the long- 14906 deprecated 'GETINFO network-status' format. Closes ticket 21703. 14907 14908 o Minor features (defaults): 14909 - The default value for UseCreateFast is now 0: clients which 14910 haven't yet received a consensus document will now use a proper 14911 ntor handshake to talk to their directory servers whenever they 14912 can. Closes ticket 21407. 14913 - Onion key rotation and expiry intervals are now defined as a 14914 network consensus parameter, per proposal 274. The default 14915 lifetime of an onion key is increased from 7 to 28 days. Old onion 14916 keys will expire after 7 days by default. This change will make 14917 consensus diffs much smaller, and save significant bandwidth. 14918 Closes ticket 21641. 14919 14920 o Minor features (fallback directory list): 14921 - Update the fallback directory mirror whitelist and blacklist based 14922 on operator emails. Closes task 21121. 14923 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in 14924 December 2016 (of which ~126 were still functional) with a list of 14925 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May 14926 2017. Resolves ticket 21564. 14927 14928 o Minor features (hidden services, logging): 14929 - Log a message when a hidden service descriptor has fewer 14930 introduction points than specified in 14931 HiddenServiceNumIntroductionPoints. Closes tickets 21598. 14932 - Log a message when a hidden service reaches its introduction point 14933 circuit limit, and when that limit is reset. Follow up to ticket 14934 21594; closes ticket 21622. 14935 - Warn user if multiple entries in EntryNodes and at least one 14936 HiddenService are used together. Pinning EntryNodes along with a 14937 hidden service can be possibly harmful; for instance see ticket 14938 14917 or 21155. Closes ticket 21155. 14939 14940 o Minor features (linux seccomp2 sandbox): 14941 - We now have a document storage backend compatible with the Linux 14942 seccomp2 sandbox. This backend is used for consensus documents and 14943 diffs between them; in the long term, we'd like to use it for 14944 unparseable directory material too. Closes ticket 21645 14945 - Increase the maximum allowed size passed to mprotect(PROT_WRITE) 14946 from 1MB to 16MB. This was necessary with the glibc allocator in 14947 order to allow worker threads to allocate more memory -- which in 14948 turn is necessary because of our new use of worker threads for 14949 compression. Closes ticket 22096. 14950 14951 o Minor features (logging): 14952 - Log files are no longer created world-readable by default. 14953 (Previously, most distributors would store the logs in a non- 14954 world-readable location to prevent inappropriate access. This 14955 change is an extra precaution.) Closes ticket 21729; patch 14956 from toralf. 14957 14958 o Minor features (performance): 14959 - Our Keccak (SHA-3) implementation now accesses memory more 14960 efficiently, especially on little-endian systems. Closes 14961 ticket 21737. 14962 - Add an O(1) implementation of channel_find_by_global_id(), to 14963 speed some controller functions. 14964 14965 o Minor features (relay, configuration): 14966 - The MyFamily option may now be repeated as many times as desired, 14967 for relays that want to configure large families. Closes ticket 14968 4998; patch by Daniel Pinto. 14969 14970 o Minor features (safety): 14971 - Add an explicit check to extrainfo_parse_entry_from_string() for 14972 NULL inputs. We don't believe this can actually happen, but it may 14973 help silence a warning from the Clang analyzer. Closes 14974 ticket 21496. 14975 14976 o Minor features (testing): 14977 - Add a "--disable-memory-sentinels" feature to help with fuzzing. 14978 When Tor is compiled with this option, we disable a number of 14979 redundant memory-safety failsafes that are intended to stop bugs 14980 from becoming security issues. This makes it easier to hunt for 14981 bugs that would be security issues without the failsafes turned 14982 on. Closes ticket 21439. 14983 - Add a general event-tracing instrumentation support to Tor. This 14984 subsystem will enable developers and researchers to add fine- 14985 grained instrumentation to their Tor instances, for use when 14986 examining Tor network performance issues. There are no trace 14987 events yet, and event-tracing is off by default unless enabled at 14988 compile time. Implements ticket 13802. 14989 - Improve our version parsing tests: add tests for typical version 14990 components, add tests for invalid versions, including numeric 14991 range and non-numeric prefixes. Unit tests 21278, 21450, and 14992 21507. Partially implements 21470. 14993 14994 o Minor bugfixes (bandwidth accounting): 14995 - Roll over monthly accounting at the configured hour and minute, 14996 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1. 14997 Found by Andrey Karpov with PVS-Studio. 14998 14999 o Minor bugfixes (code correctness): 15000 - Accurately identify client connections by their lack of peer 15001 authentication. This means that we bail out earlier if asked to 15002 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix 15003 on 0.2.4.23. 15004 15005 o Minor bugfixes (configuration): 15006 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes 15007 bug 22252; bugfix on 0.2.9.3-alpha. 15008 15009 o Minor bugfixes (connection lifespan): 15010 - Allow more control over how long TLS connections are kept open: 15011 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a 15012 single option called CircuitsAvailableTimeout. Also, allow the 15013 consensus to control the default values for both this preference 15014 and the lifespan of relay-to-relay connections. Fixes bug 17592; 15015 bugfix on 0.2.5.5-alpha. 15016 - Increase the initial circuit build timeout testing frequency, to 15017 help ensure that ReducedConnectionPadding clients finish learning 15018 a timeout before their orconn would expire. The initial testing 15019 rate was set back in the days of TAP and before the Tor Browser 15020 updater, when we had to be much more careful about new clients 15021 making lots of circuits. With this change, a circuit build timeout 15022 is learned in about 15-20 minutes, instead of 100-120 minutes. 15023 15024 o Minor bugfixes (controller): 15025 - GETINFO onions/current and onions/detached no longer respond with 15026 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha. 15027 - Trigger HS descriptor events on the control port when the client 15028 fails to pick a hidden service directory for a hidden service. 15029 This can happen if all the hidden service directories are in 15030 ExcludeNodes, or they have all been queried within the last 15 15031 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha. 15032 15033 o Minor bugfixes (directory authority): 15034 - When rejecting a router descriptor for running an obsolete version 15035 of Tor without ntor support, warn about the obsolete tor version, 15036 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha. 15037 - Prevent the shared randomness subsystem from asserting when 15038 initialized by a bridge authority with an incomplete configuration 15039 file. Fixes bug 21586; bugfix on 0.2.9.8. 15040 15041 o Minor bugfixes (exit-side DNS): 15042 - Fix an untriggerable assertion that checked the output of a 15043 libevent DNS error, so that the assertion actually behaves as 15044 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey 15045 Karpov using PVS-Studio. 15046 15047 o Minor bugfixes (fallback directories): 15048 - Make the usage example in updateFallbackDirs.py actually work, and 15049 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha. 15050 - Decrease the guard flag average required to be a fallback. This 15051 allows us to keep relays that have their guard flag removed when 15052 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha. 15053 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913; 15054 bugfix on 0.2.8.1-alpha. 15055 - Make sure fallback directory mirrors have the same address, port, 15056 and relay identity key for at least 30 days before they are 15057 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha. 15058 15059 o Minor bugfixes (hidden services): 15060 - Stop printing a cryptic warning when a hidden service gets a 15061 request to connect to a virtual port that it hasn't configured. 15062 Fixes bug 16706; bugfix on 0.2.6.3-alpha. 15063 - Simplify hidden service descriptor creation by using an existing 15064 flag to check if an introduction point is established. Fixes bug 15065 21599; bugfix on 0.2.7.2-alpha. 15066 15067 o Minor bugfixes (memory leak): 15068 - Fix a small memory leak at exit from the backtrace handler code. 15069 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto. 15070 15071 o Minor bugfixes (protocol, logging): 15072 - Downgrade a log statement about unexpected relay cells from "bug" 15073 to "protocol warning", because there is at least one use case 15074 where it can be triggered by a buggy tor implementation. Fixes bug 15075 21293; bugfix on 0.1.1.14-alpha. 15076 15077 o Minor bugfixes (testing): 15078 - Use unbuffered I/O for utility functions around the 15079 process_handle_t type. This fixes unit test failures reported on 15080 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha. 15081 - Make display of captured unit test log messages consistent. Fixes 15082 bug 21510; bugfix on 0.2.9.3-alpha. 15083 - Make test-network.sh always call chutney's test-network.sh. 15084 Previously, this only worked on systems which had bash installed, 15085 due to some bash-specific code in the script. Fixes bug 19699; 15086 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581. 15087 15088 o Minor bugfixes (voting consistency): 15089 - Reject version numbers with non-numeric prefixes (such as +, -, or 15090 whitespace). Disallowing whitespace prevents differential version 15091 parsing between POSIX-based and Windows platforms. Fixes bug 21507 15092 and part of 21508; bugfix on 0.0.8pre1. 15093 15094 o Minor bugfixes (windows, relay): 15095 - Resolve "Failure from drain_fd: No error" warnings on Windows 15096 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha. 15097 15098 o Code simplification and refactoring: 15099 - Break up the 630-line function connection_dir_client_reached_eof() 15100 into a dozen smaller functions. This change should help 15101 maintainability and readability of the client directory code. 15102 - Isolate our use of the openssl headers so that they are only 15103 included from our crypto wrapper modules, and from tests that 15104 examine those modules' internals. Closes ticket 21841. 15105 - Simplify our API to launch directory requests, making it more 15106 extensible and less error-prone. Now it's easier to add extra 15107 headers to directory requests. Closes ticket 21646. 15108 - Our base64 decoding functions no longer overestimate the output 15109 space that they need when parsing unpadded inputs. Closes 15110 ticket 17868. 15111 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value. 15112 Resolves ticket 22213. 15113 - The logic that directory caches use to spool request to clients, 15114 serving them one part at a time so as not to allocate too much 15115 memory, has been refactored for consistency. Previously there was 15116 a separate spooling implementation per type of spoolable data. Now 15117 there is one common spooling implementation, with extensible data 15118 types. Closes ticket 21651. 15119 - Tor's compression module now supports multiple backends. Part of 15120 the implementation for proposal 278; closes ticket 21663. 15121 15122 o Documentation: 15123 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option. 15124 Closes ticket 21873. 15125 - Correct documentation about the default DataDirectory value. 15126 Closes ticket 21151. 15127 - Document the default behavior of NumEntryGuards and 15128 NumDirectoryGuards correctly. Fixes bug 21715; bugfix 15129 on 0.3.0.1-alpha. 15130 - Document key=value pluggable transport arguments for Bridge lines 15131 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha. 15132 - Note that bandwidth-limiting options don't affect TCP headers or 15133 DNS. Closes ticket 17170. 15134 15135 o Removed features (configuration options, all in ticket 22060): 15136 - These configuration options are now marked Obsolete, and no longer 15137 have any effect: AllowInvalidNodes, AllowSingleHopCircuits, 15138 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK, 15139 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated 15140 in 0.2.9.2-alpha and have now been removed. The previous default 15141 behavior is now always chosen; the previous (less secure) non- 15142 default behavior is now unavailable. 15143 - CloseHSClientCircuitsImmediatelyOnTimeout and 15144 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in 15145 0.2.9.2-alpha and now have been removed. HS circuits never close 15146 on circuit build timeout; they have a longer timeout period. 15147 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated 15148 in 0.2.9.2-alpha and now have been removed. Use the ORPort option 15149 (and others) to configure listen-only and advertise-only addresses. 15150 15151 o Removed features (tools): 15152 - We've removed the tor-checkkey tool from src/tools. Long ago, we 15153 used it to help people detect RSA keys that were generated by 15154 versions of Debian affected by CVE-2008-0166. But those keys have 15155 been out of circulation for ages, and this tool is no longer 15156 required. Closes ticket 21842. 15157 15158 15159Changes in version 0.3.0.7 - 2017-05-15 15160 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions 15161 of Tor 0.3.0.x, where an attacker could cause a Tor relay process 15162 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade; 15163 clients are not affected. 15164 15165 o Major bugfixes (hidden service directory, security): 15166 - Fix an assertion failure in the hidden service directory code, which 15167 could be used by an attacker to remotely cause a Tor relay process to 15168 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade. 15169 should upgrade. This security issue is tracked as TROVE-2017-002. 15170 Fixes bug 22246; bugfix on 0.3.0.1-alpha. 15171 15172 o Minor features: 15173 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2 15174 Country database. 15175 15176 o Minor features (future-proofing): 15177 - Tor no longer refuses to download microdescriptors or descriptors 15178 if they are listed as "published in the future". This change will 15179 eventually allow us to stop listing meaningful "published" dates 15180 in microdescriptor consensuses, and thereby allow us to reduce the 15181 resources required to download consensus diffs by over 50%. 15182 Implements part of ticket 21642; implements part of proposal 275. 15183 15184 o Minor bugfixes (Linux seccomp2 sandbox): 15185 - The getpid() system call is now permitted under the Linux seccomp2 15186 sandbox, to avoid crashing with versions of OpenSSL (and other 15187 libraries) that attempt to learn the process's PID by using the 15188 syscall rather than the VDSO code. Fixes bug 21943; bugfix 15189 on 0.2.5.1-alpha. 15190 15191 15192Changes in version 0.3.0.6 - 2017-04-26 15193 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series. 15194 15195 With the 0.3.0 series, clients and relays now use Ed25519 keys to 15196 authenticate their link connections to relays, rather than the old 15197 RSA1024 keys that they used before. (Circuit crypto has been 15198 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced 15199 the guard selection and replacement algorithm to behave more robustly 15200 in the presence of unreliable networks, and to resist guard- 15201 capture attacks. 15202 15203 This series also includes numerous other small features and bugfixes, 15204 along with more groundwork for the upcoming hidden-services revamp. 15205 15206 Per our stable release policy, we plan to support the Tor 0.3.0 15207 release series for at least the next nine months, or for three months 15208 after the first stable release of the 0.3.1 series: whichever is 15209 longer. If you need a release with long-term support, we recommend 15210 that you stay with the 0.2.9 series. 15211 15212 Below are the changes since 0.3.0.5-rc. For a list of all changes 15213 since 0.2.9, see the ReleaseNotes file. 15214 15215 o Minor features (geoip): 15216 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2 15217 Country database. 15218 15219 o Minor bugfixes (control port): 15220 - The GETINFO extra-info/digest/<digest> command was broken because 15221 of a wrong base16 decode return value check, introduced when 15222 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha. 15223 15224 o Minor bugfixes (crash prevention): 15225 - Fix a (currently untriggerable, but potentially dangerous) crash 15226 bug when base32-encoding inputs whose sizes are not a multiple of 15227 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha. 15228 15229 15230Changes in version 0.3.0.5-rc - 2017-04-05 15231 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the 15232 0.3.0 release series. 15233 15234 This is the second release candidate in the Tor 0.3.0 series, and has 15235 much fewer changes than the first. If we find no new bugs or 15236 regressions here, the first stable 0.3.0 release will be nearly 15237 identical to it. 15238 15239 o Major bugfixes (crash, directory connections): 15240 - Fix a rare crash when sending a begin cell on a circuit whose 15241 linked directory connection had already been closed. Fixes bug 15242 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett. 15243 15244 o Major bugfixes (guard selection): 15245 - Fix a guard selection bug where Tor would refuse to bootstrap in 15246 some cases if the user swapped a bridge for another bridge in 15247 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha. 15248 Reported by "torvlnt33r". 15249 15250 o Minor features (geoip): 15251 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2 15252 Country database. 15253 15254 o Minor bugfix (compilation): 15255 - Fix a warning when compiling hs_service.c. Previously, it had no 15256 exported symbols when compiled for libor.a, resulting in a 15257 compilation warning from clang. Fixes bug 21825; bugfix 15258 on 0.3.0.1-alpha. 15259 15260 o Minor bugfixes (hidden services): 15261 - Make hidden services check for failed intro point connections, 15262 even when they have exceeded their intro point creation limit. 15263 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett. 15264 - Make hidden services with 8 to 10 introduction points check for 15265 failed circuits immediately after startup. Previously, they would 15266 wait for 5 minutes before performing their first checks. Fixes bug 15267 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett. 15268 15269 o Minor bugfixes (memory leaks): 15270 - Fix a memory leak when using GETCONF on a port option. Fixes bug 15271 21682; bugfix on 0.3.0.3-alpha. 15272 15273 o Minor bugfixes (relay): 15274 - Avoid a double-marked-circuit warning that could happen when we 15275 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix 15276 on 0.1.0.1-rc. 15277 15278 o Minor bugfixes (tests): 15279 - Run the entry_guard_parse_from_state_full() test with the time set 15280 to a specific date. (The guard state that this test was parsing 15281 contained guards that had expired since the test was first 15282 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha. 15283 15284 o Documentation: 15285 - Update the description of the directory server options in the 15286 manual page, to clarify that a relay no longer needs to set 15287 DirPort in order to be a directory cache. Closes ticket 21720. 15288 15289 15290 15291Changes in version 0.2.8.13 - 2017-03-03 15292 Tor 0.2.8.13 backports a security fix from later Tor 15293 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this 15294 this release, if for some reason they cannot upgrade to a later 15295 release series, and if they build Tor with the --enable-expensive-hardening 15296 option. 15297 15298 Note that support for Tor 0.2.8.x is ending next year: we will not issue 15299 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need 15300 a Tor release series with longer-term support, we recommend Tor 0.2.9.x. 15301 15302 o Major bugfixes (parsing, backported from 0.3.0.4-rc): 15303 - Fix an integer underflow bug when comparing malformed Tor 15304 versions. This bug could crash Tor when built with 15305 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15306 0.2.9.8, which were built with -ftrapv by default. In other cases 15307 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15308 on 0.0.8pre1. Found by OSS-Fuzz. 15309 15310 o Minor features (geoip): 15311 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15312 Country database. 15313 15314 15315Changes in version 0.2.7.7 - 2017-03-03 15316 Tor 0.2.7.7 backports a number of security fixes from later Tor 15317 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to 15318 this release, if for some reason they cannot upgrade to a later 15319 release series. 15320 15321 Note that support for Tor 0.2.7.x is ending this year: we will not issue 15322 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need 15323 a Tor release series with longer-term support, we recommend Tor 0.2.9.x. 15324 15325 o Directory authority changes (backport from 0.2.8.5-rc): 15326 - Urras is no longer a directory authority. Closes ticket 19271. 15327 15328 o Directory authority changes (backport from 0.2.9.2-alpha): 15329 - The "Tonga" bridge authority has been retired; the new bridge 15330 authority is "Bifroest". Closes tickets 19728 and 19690. 15331 15332 o Directory authority key updates (backport from 0.2.8.1-alpha): 15333 - Update the V3 identity key for the dannenberg directory authority: 15334 it was changed on 18 November 2015. Closes task 17906. Patch 15335 by "teor". 15336 15337 o Major bugfixes (parsing, security, backport from 0.2.9.8): 15338 - Fix a bug in parsing that could cause clients to read a single 15339 byte past the end of an allocated region. This bug could be used 15340 to cause hardened clients (built with --enable-expensive-hardening) 15341 to crash if they tried to visit a hostile hidden service. Non- 15342 hardened clients are only affected depending on the details of 15343 their platform's memory allocator. Fixes bug 21018; bugfix on 15344 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 15345 2016-12-002 and as CVE-2016-1254. 15346 15347 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha): 15348 - Stop a crash that could occur when a client running with DNSPort 15349 received a query with multiple address types, and the first 15350 address type was not supported. Found and fixed by Scott Dial. 15351 Fixes bug 18710; bugfix on 0.2.5.4-alpha. 15352 - Prevent a class of security bugs caused by treating the contents 15353 of a buffer chunk as if they were a NUL-terminated string. At 15354 least one such bug seems to be present in all currently used 15355 versions of Tor, and would allow an attacker to remotely crash 15356 most Tor instances, especially those compiled with extra compiler 15357 hardening. With this defense in place, such bugs can't crash Tor, 15358 though we should still fix them as they occur. Closes ticket 15359 20384 (TROVE-2016-10-001). 15360 15361 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha): 15362 - Avoid a difficult-to-trigger heap corruption attack when extending 15363 a smartlist to contain over 16GB of pointers. Fixes bug 18162; 15364 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. 15365 Reported by Guido Vranken. 15366 15367 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha): 15368 - Avoid crashing when running as a DNS proxy. Fixes bug 16248; 15369 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". 15370 15371 o Major bugfixes (key management, backport from 0.2.8.3-alpha): 15372 - If OpenSSL fails to generate an RSA key, do not retain a dangling 15373 pointer to the previous (uninitialized) key value. The impact here 15374 should be limited to a difficult-to-trigger crash, if OpenSSL is 15375 running an engine that makes key generation failures possible, or 15376 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on 15377 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and 15378 Baishakhi Ray. 15379 15380 o Major bugfixes (parsing, backported from 0.3.0.4-rc): 15381 - Fix an integer underflow bug when comparing malformed Tor 15382 versions. This bug could crash Tor when built with 15383 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15384 0.2.9.8, which were built with -ftrapv by default. In other cases 15385 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15386 on 0.0.8pre1. Found by OSS-Fuzz. 15387 15388 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha): 15389 - Make memwipe() do nothing when passed a NULL pointer or buffer of 15390 zero size. Check size argument to memwipe() for underflow. Fixes 15391 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", 15392 patch by "teor". 15393 15394 o Minor features (bug-resistance, backport from 0.2.8.2-alpha): 15395 - Make Tor survive errors involving connections without a 15396 corresponding event object. Previously we'd fail with an 15397 assertion; now we produce a log message. Related to bug 16248. 15398 15399 o Minor features (geoip): 15400 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15401 Country database. 15402 15403 15404Changes in version 0.2.6.11 - 2017-03-03 15405 Tor 0.2.6.11 backports a number of security fixes from later Tor 15406 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to 15407 this release, if for some reason they cannot upgrade to a later 15408 release series. 15409 15410 Note that support for Tor 0.2.6.x is ending this year: we will not issue 15411 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need 15412 a Tor release series with longer-term support, we recommend Tor 0.2.9.x. 15413 15414 o Directory authority changes (backport from 0.2.8.5-rc): 15415 - Urras is no longer a directory authority. Closes ticket 19271. 15416 15417 o Directory authority changes (backport from 0.2.9.2-alpha): 15418 - The "Tonga" bridge authority has been retired; the new bridge 15419 authority is "Bifroest". Closes tickets 19728 and 19690. 15420 15421 o Directory authority key updates (backport from 0.2.8.1-alpha): 15422 - Update the V3 identity key for the dannenberg directory authority: 15423 it was changed on 18 November 2015. Closes task 17906. Patch 15424 by "teor". 15425 15426 o Major features (security fixes, backport from 0.2.9.4-alpha): 15427 - Prevent a class of security bugs caused by treating the contents 15428 of a buffer chunk as if they were a NUL-terminated string. At 15429 least one such bug seems to be present in all currently used 15430 versions of Tor, and would allow an attacker to remotely crash 15431 most Tor instances, especially those compiled with extra compiler 15432 hardening. With this defense in place, such bugs can't crash Tor, 15433 though we should still fix them as they occur. Closes ticket 15434 20384 (TROVE-2016-10-001). 15435 15436 o Major bugfixes (parsing, security, backport from 0.2.9.8): 15437 - Fix a bug in parsing that could cause clients to read a single 15438 byte past the end of an allocated region. This bug could be used 15439 to cause hardened clients (built with --enable-expensive-hardening) 15440 to crash if they tried to visit a hostile hidden service. Non- 15441 hardened clients are only affected depending on the details of 15442 their platform's memory allocator. Fixes bug 21018; bugfix on 15443 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 15444 2016-12-002 and as CVE-2016-1254. 15445 15446 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha): 15447 - Stop a crash that could occur when a client running with DNSPort 15448 received a query with multiple address types, and the first 15449 address type was not supported. Found and fixed by Scott Dial. 15450 Fixes bug 18710; bugfix on 0.2.5.4-alpha. 15451 15452 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc): 15453 - Fix an error that could cause us to read 4 bytes before the 15454 beginning of an openssl string. This bug could be used to cause 15455 Tor to crash on systems with unusual malloc implementations, or 15456 systems with unusual hardening installed. Fixes bug 17404; bugfix 15457 on 0.2.3.6-alpha. 15458 15459 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha): 15460 - Avoid a difficult-to-trigger heap corruption attack when extending 15461 a smartlist to contain over 16GB of pointers. Fixes bug 18162; 15462 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. 15463 Reported by Guido Vranken. 15464 15465 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha): 15466 - Avoid crashing when running as a DNS proxy. Fixes bug 16248; 15467 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". 15468 15469 o Major bugfixes (guard selection, backport from 0.2.7.6): 15470 - Actually look at the Guard flag when selecting a new directory 15471 guard. When we implemented the directory guard design, we 15472 accidentally started treating all relays as if they have the Guard 15473 flag during guard selection, leading to weaker anonymity and worse 15474 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered 15475 by Mohsen Imani. 15476 15477 o Major bugfixes (key management, backport from 0.2.8.3-alpha): 15478 - If OpenSSL fails to generate an RSA key, do not retain a dangling 15479 pointer to the previous (uninitialized) key value. The impact here 15480 should be limited to a difficult-to-trigger crash, if OpenSSL is 15481 running an engine that makes key generation failures possible, or 15482 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on 15483 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and 15484 Baishakhi Ray. 15485 15486 o Major bugfixes (parsing, backported from 0.3.0.4-rc): 15487 - Fix an integer underflow bug when comparing malformed Tor 15488 versions. This bug could crash Tor when built with 15489 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15490 0.2.9.8, which were built with -ftrapv by default. In other cases 15491 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15492 on 0.0.8pre1. Found by OSS-Fuzz. 15493 15494 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha): 15495 - Make memwipe() do nothing when passed a NULL pointer or buffer of 15496 zero size. Check size argument to memwipe() for underflow. Fixes 15497 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", 15498 patch by "teor". 15499 15500 o Minor features (bug-resistance, backport from 0.2.8.2-alpha): 15501 - Make Tor survive errors involving connections without a 15502 corresponding event object. Previously we'd fail with an 15503 assertion; now we produce a log message. Related to bug 16248. 15504 15505 o Minor features (geoip): 15506 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15507 Country database. 15508 15509 o Minor bugfixes (compilation, backport from 0.2.7.6): 15510 - Fix a compilation warning with Clang 3.6: Do not check the 15511 presence of an address which can never be NULL. Fixes bug 17781. 15512 15513 15514Changes in version 0.2.5.13 - 2017-03-03 15515 Tor 0.2.5.13 backports a number of security fixes from later Tor 15516 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to 15517 this release, if for some reason they cannot upgrade to a later 15518 release series. 15519 15520 Note that support for Tor 0.2.5.x is ending next year: we will not issue 15521 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need 15522 a Tor release series with longer-term support, we recommend Tor 0.2.9.x. 15523 15524 o Directory authority changes (backport from 0.2.8.5-rc): 15525 - Urras is no longer a directory authority. Closes ticket 19271. 15526 15527 o Directory authority changes (backport from 0.2.9.2-alpha): 15528 - The "Tonga" bridge authority has been retired; the new bridge 15529 authority is "Bifroest". Closes tickets 19728 and 19690. 15530 15531 o Directory authority key updates (backport from 0.2.8.1-alpha): 15532 - Update the V3 identity key for the dannenberg directory authority: 15533 it was changed on 18 November 2015. Closes task 17906. Patch 15534 by "teor". 15535 15536 o Major features (security fixes, backport from 0.2.9.4-alpha): 15537 - Prevent a class of security bugs caused by treating the contents 15538 of a buffer chunk as if they were a NUL-terminated string. At 15539 least one such bug seems to be present in all currently used 15540 versions of Tor, and would allow an attacker to remotely crash 15541 most Tor instances, especially those compiled with extra compiler 15542 hardening. With this defense in place, such bugs can't crash Tor, 15543 though we should still fix them as they occur. Closes ticket 15544 20384 (TROVE-2016-10-001). 15545 15546 o Major bugfixes (parsing, security, backport from 0.2.9.8): 15547 - Fix a bug in parsing that could cause clients to read a single 15548 byte past the end of an allocated region. This bug could be used 15549 to cause hardened clients (built with --enable-expensive-hardening) 15550 to crash if they tried to visit a hostile hidden service. Non- 15551 hardened clients are only affected depending on the details of 15552 their platform's memory allocator. Fixes bug 21018; bugfix on 15553 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 15554 2016-12-002 and as CVE-2016-1254. 15555 15556 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha): 15557 - Stop a crash that could occur when a client running with DNSPort 15558 received a query with multiple address types, and the first 15559 address type was not supported. Found and fixed by Scott Dial. 15560 Fixes bug 18710; bugfix on 0.2.5.4-alpha. 15561 15562 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc): 15563 - Fix an error that could cause us to read 4 bytes before the 15564 beginning of an openssl string. This bug could be used to cause 15565 Tor to crash on systems with unusual malloc implementations, or 15566 systems with unusual hardening installed. Fixes bug 17404; bugfix 15567 on 0.2.3.6-alpha. 15568 15569 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha): 15570 - Avoid a difficult-to-trigger heap corruption attack when extending 15571 a smartlist to contain over 16GB of pointers. Fixes bug 18162; 15572 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. 15573 Reported by Guido Vranken. 15574 15575 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha): 15576 - Avoid crashing when running as a DNS proxy. Fixes bug 16248; 15577 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". 15578 15579 o Major bugfixes (guard selection, backport from 0.2.7.6): 15580 - Actually look at the Guard flag when selecting a new directory 15581 guard. When we implemented the directory guard design, we 15582 accidentally started treating all relays as if they have the Guard 15583 flag during guard selection, leading to weaker anonymity and worse 15584 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered 15585 by Mohsen Imani. 15586 15587 o Major bugfixes (key management, backport from 0.2.8.3-alpha): 15588 - If OpenSSL fails to generate an RSA key, do not retain a dangling 15589 pointer to the previous (uninitialized) key value. The impact here 15590 should be limited to a difficult-to-trigger crash, if OpenSSL is 15591 running an engine that makes key generation failures possible, or 15592 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on 15593 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and 15594 Baishakhi Ray. 15595 15596 o Major bugfixes (parsing, backported from 0.3.0.4-rc): 15597 - Fix an integer underflow bug when comparing malformed Tor 15598 versions. This bug could crash Tor when built with 15599 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15600 0.2.9.8, which were built with -ftrapv by default. In other cases 15601 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15602 on 0.0.8pre1. Found by OSS-Fuzz. 15603 15604 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha): 15605 - Make memwipe() do nothing when passed a NULL pointer or buffer of 15606 zero size. Check size argument to memwipe() for underflow. Fixes 15607 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", 15608 patch by "teor". 15609 15610 o Minor features (bug-resistance, backport from 0.2.8.2-alpha): 15611 - Make Tor survive errors involving connections without a 15612 corresponding event object. Previously we'd fail with an 15613 assertion; now we produce a log message. Related to bug 16248. 15614 15615 o Minor features (geoip): 15616 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15617 Country database. 15618 15619 o Minor bugfixes (compilation, backport from 0.2.7.6): 15620 - Fix a compilation warning with Clang 3.6: Do not check the 15621 presence of an address which can never be NULL. Fixes bug 17781. 15622 15623 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha): 15624 - Check for failures from crypto_early_init, and refuse to continue. 15625 A previous typo meant that we could keep going with an 15626 uninitialized crypto library, and would have OpenSSL initialize 15627 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced 15628 when implementing ticket 4900. Patch by "teor". 15629 15630 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha): 15631 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on 15632 a client authorized hidden service. Fixes bug 15823; bugfix 15633 on 0.2.1.6-alpha. 15634 15635 15636Changes in version 0.2.4.28 - 2017-03-03 15637 Tor 0.2.4.28 backports a number of security fixes from later Tor 15638 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to 15639 this release, if for some reason they cannot upgrade to a later 15640 release series. 15641 15642 Note that support for Tor 0.2.4.x is ending soon: we will not issue 15643 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need 15644 a Tor release series with long-term support, we recommend Tor 0.2.9.x. 15645 15646 o Directory authority changes (backport from 0.2.8.5-rc): 15647 - Urras is no longer a directory authority. Closes ticket 19271. 15648 15649 o Directory authority changes (backport from 0.2.9.2-alpha): 15650 - The "Tonga" bridge authority has been retired; the new bridge 15651 authority is "Bifroest". Closes tickets 19728 and 19690. 15652 15653 o Directory authority key updates (backport from 0.2.8.1-alpha): 15654 - Update the V3 identity key for the dannenberg directory authority: 15655 it was changed on 18 November 2015. Closes task 17906. Patch 15656 by "teor". 15657 15658 o Major features (security fixes, backport from 0.2.9.4-alpha): 15659 - Prevent a class of security bugs caused by treating the contents 15660 of a buffer chunk as if they were a NUL-terminated string. At 15661 least one such bug seems to be present in all currently used 15662 versions of Tor, and would allow an attacker to remotely crash 15663 most Tor instances, especially those compiled with extra compiler 15664 hardening. With this defense in place, such bugs can't crash Tor, 15665 though we should still fix them as they occur. Closes ticket 15666 20384 (TROVE-2016-10-001). 15667 15668 o Major bugfixes (parsing, security, backport from 0.2.9.8): 15669 - Fix a bug in parsing that could cause clients to read a single 15670 byte past the end of an allocated region. This bug could be used 15671 to cause hardened clients (built with --enable-expensive-hardening) 15672 to crash if they tried to visit a hostile hidden service. Non- 15673 hardened clients are only affected depending on the details of 15674 their platform's memory allocator. Fixes bug 21018; bugfix on 15675 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 15676 2016-12-002 and as CVE-2016-1254. 15677 15678 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc): 15679 - Fix an error that could cause us to read 4 bytes before the 15680 beginning of an openssl string. This bug could be used to cause 15681 Tor to crash on systems with unusual malloc implementations, or 15682 systems with unusual hardening installed. Fixes bug 17404; bugfix 15683 on 0.2.3.6-alpha. 15684 15685 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha): 15686 - Avoid a difficult-to-trigger heap corruption attack when extending 15687 a smartlist to contain over 16GB of pointers. Fixes bug 18162; 15688 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. 15689 Reported by Guido Vranken. 15690 15691 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha): 15692 - Avoid crashing when running as a DNS proxy. Fixes bug 16248; 15693 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". 15694 15695 o Major bugfixes (guard selection, backport from 0.2.7.6): 15696 - Actually look at the Guard flag when selecting a new directory 15697 guard. When we implemented the directory guard design, we 15698 accidentally started treating all relays as if they have the Guard 15699 flag during guard selection, leading to weaker anonymity and worse 15700 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered 15701 by Mohsen Imani. 15702 15703 o Major bugfixes (key management, backport from 0.2.8.3-alpha): 15704 - If OpenSSL fails to generate an RSA key, do not retain a dangling 15705 pointer to the previous (uninitialized) key value. The impact here 15706 should be limited to a difficult-to-trigger crash, if OpenSSL is 15707 running an engine that makes key generation failures possible, or 15708 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on 15709 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and 15710 Baishakhi Ray. 15711 15712 o Major bugfixes (parsing, backported from 0.3.0.4-rc): 15713 - Fix an integer underflow bug when comparing malformed Tor 15714 versions. This bug could crash Tor when built with 15715 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15716 0.2.9.8, which were built with -ftrapv by default. In other cases 15717 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15718 on 0.0.8pre1. Found by OSS-Fuzz. 15719 15720 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha): 15721 - Make memwipe() do nothing when passed a NULL pointer or buffer of 15722 zero size. Check size argument to memwipe() for underflow. Fixes 15723 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", 15724 patch by "teor". 15725 15726 o Minor features (bug-resistance, backport from 0.2.8.2-alpha): 15727 - Make Tor survive errors involving connections without a 15728 corresponding event object. Previously we'd fail with an 15729 assertion; now we produce a log message. Related to bug 16248. 15730 15731 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha): 15732 - Make it harder for attackers to overload hidden services with 15733 introductions, by blocking multiple introduction requests on the 15734 same circuit. Resolves ticket 15515. 15735 15736 o Minor features (geoip): 15737 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15738 Country database. 15739 15740 o Minor bugfixes (compilation, backport from 0.2.7.6): 15741 - Fix a compilation warning with Clang 3.6: Do not check the 15742 presence of an address which can never be NULL. Fixes bug 17781. 15743 15744 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha): 15745 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on 15746 a client authorized hidden service. Fixes bug 15823; bugfix 15747 on 0.2.1.6-alpha. 15748 15749 15750Changes in version 0.3.0.4-rc - 2017-03-01 15751 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the 15752 0.3.0 release series, and introduces a few reliability features to 15753 keep them from coming back. 15754 15755 This is the first release candidate in the Tor 0.3.0 series. If we 15756 find no new bugs or regressions here, the first stable 0.3.0 release 15757 will be nearly identical to it. 15758 15759 o Major bugfixes (bridges): 15760 - When the same bridge is configured multiple times with the same 15761 identity, but at different address:port combinations, treat those 15762 bridge instances as separate guards. This fix restores the ability 15763 of clients to configure the same bridge with multiple pluggable 15764 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha. 15765 15766 o Major bugfixes (hidden service directory v3): 15767 - Stop crashing on a failed v3 hidden service descriptor lookup 15768 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha. 15769 15770 o Major bugfixes (parsing): 15771 - When parsing a malformed content-length field from an HTTP 15772 message, do not read off the end of the buffer. This bug was a 15773 potential remote denial-of-service attack against Tor clients and 15774 relays. A workaround was released in October 2016, to prevent this 15775 bug from crashing Tor. This is a fix for the underlying issue, 15776 which should no longer matter (if you applied the earlier patch). 15777 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing 15778 using AFL (http://lcamtuf.coredump.cx/afl/). 15779 - Fix an integer underflow bug when comparing malformed Tor 15780 versions. This bug could crash Tor when built with 15781 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15782 0.2.9.8, which were built with -ftrapv by default. In other cases 15783 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15784 on 0.0.8pre1. Found by OSS-Fuzz. 15785 15786 o Minor feature (protocol versioning): 15787 - Add new protocol version for proposal 224. HSIntro now advertises 15788 version "3-4" and HSDir version "1-2". Fixes ticket 20656. 15789 15790 o Minor features (directory authorities): 15791 - Directory authorities now reject descriptors that claim to be 15792 malformed versions of Tor. Helps prevent exploitation of 15793 bug 21278. 15794 - Reject version numbers with components that exceed INT32_MAX. 15795 Otherwise 32-bit and 64-bit platforms would behave inconsistently. 15796 Fixes bug 21450; bugfix on 0.0.8pre1. 15797 - Directory authorities now reject relays running versions 15798 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays 15799 suffer from bug 20499 and don't keep their consensus cache 15800 up-to-date. Resolves ticket 20509. 15801 15802 o Minor features (geoip): 15803 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15804 Country database. 15805 15806 o Minor features (reliability, crash): 15807 - Try better to detect problems in buffers where they might grow (or 15808 think they have grown) over 2 GB in size. Diagnostic for 15809 bug 21369. 15810 15811 o Minor features (testing): 15812 - During 'make test-network-all', if tor logs any warnings, ask 15813 chutney to output them. Requires a recent version of chutney with 15814 the 21572 patch. Implements 21570. 15815 15816 o Minor bugfixes (certificate expiration time): 15817 - Avoid using link certificates that don't become valid till some 15818 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha 15819 15820 o Minor bugfixes (code correctness): 15821 - Repair a couple of (unreachable or harmless) cases of the risky 15822 comparison-by-subtraction pattern that caused bug 21278. 15823 - Remove a redundant check for the UseEntryGuards option from the 15824 options_transition_affects_guards() function. Fixes bug 21492; 15825 bugfix on 0.3.0.1-alpha. 15826 15827 o Minor bugfixes (directory mirrors): 15828 - Allow relays to use directory mirrors without a DirPort: these 15829 relays need to be contacted over their ORPorts using a begindir 15830 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha. 15831 - Clarify the message logged when a remote relay is unexpectedly 15832 missing an ORPort or DirPort: users were confusing this with a 15833 local port. Fixes another case of bug 20711; bugfix 15834 on 0.2.8.2-alpha. 15835 15836 o Minor bugfixes (guards): 15837 - Don't warn about a missing guard state on timeout-measurement 15838 circuits: they aren't supposed to be using guards. Fixes an 15839 instance of bug 21007; bugfix on 0.3.0.1-alpha. 15840 - Silence a BUG() warning when attempting to use a guard whose 15841 descriptor we don't know, and make this scenario less likely to 15842 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha. 15843 15844 o Minor bugfixes (hidden service): 15845 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO 15846 cells. Previously, we were using sizeof() on a pointer, instead of 15847 the real destination buffer. Fortunately, that value was only used 15848 to double-check that there was enough room--which was already 15849 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha. 15850 15851 o Minor bugfixes (testing): 15852 - Fix Raspbian build issues related to missing socket errno in 15853 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch 15854 by "hein". 15855 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't 15856 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha. 15857 - Use bash in src/test/test-network.sh. This ensures we reliably 15858 call chutney's newer tools/test-network.sh when available. Fixes 15859 bug 21562; bugfix on 0.2.9.1-alpha. 15860 15861 o Documentation: 15862 - Small fixes to the fuzzing documentation. Closes ticket 21472. 15863 15864 15865Changes in version 0.2.9.10 - 2017-03-01 15866 Tor 0.2.9.10 backports a security fix from later Tor release. It also 15867 includes fixes for some major issues affecting directory authorities, 15868 LibreSSL compatibility, and IPv6 correctness. 15869 15870 The Tor 0.2.9.x release series is now marked as a long-term-support 15871 series. We intend to backport security fixes to 0.2.9.x until at 15872 least January of 2020. 15873 15874 o Major bugfixes (directory authority, 0.3.0.3-alpha): 15875 - During voting, when marking a relay as a probable sybil, do not 15876 clear its BadExit flag: sybils can still be bad in other ways 15877 too. (We still clear the other flags.) Fixes bug 21108; bugfix 15878 on 0.2.0.13-alpha. 15879 15880 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha): 15881 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects 15882 any IPv6 addresses. Instead, only reject a port over IPv6 if the 15883 exit policy rejects that port on more than an IPv6 /16 of 15884 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha, 15885 which rejected a relay's own IPv6 address by default. Fixes bug 15886 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha. 15887 15888 o Major bugfixes (parsing, also in 0.3.0.4-rc): 15889 - Fix an integer underflow bug when comparing malformed Tor 15890 versions. This bug could crash Tor when built with 15891 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor 15892 0.2.9.8, which were built with -ftrapv by default. In other cases 15893 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix 15894 on 0.0.8pre1. Found by OSS-Fuzz. 15895 15896 o Minor features (directory authorities, also in 0.3.0.4-rc): 15897 - Directory authorities now reject descriptors that claim to be 15898 malformed versions of Tor. Helps prevent exploitation of 15899 bug 21278. 15900 - Reject version numbers with components that exceed INT32_MAX. 15901 Otherwise 32-bit and 64-bit platforms would behave inconsistently. 15902 Fixes bug 21450; bugfix on 0.0.8pre1. 15903 15904 o Minor features (geoip): 15905 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2 15906 Country database. 15907 15908 o Minor features (portability, compilation, backport from 0.3.0.3-alpha): 15909 - Autoconf now checks to determine if OpenSSL structures are opaque, 15910 instead of explicitly checking for OpenSSL version numbers. Part 15911 of ticket 21359. 15912 - Support building with recent LibreSSL code that uses opaque 15913 structures. Closes ticket 21359. 15914 15915 o Minor bugfixes (code correctness, also in 0.3.0.4-rc): 15916 - Repair a couple of (unreachable or harmless) cases of the risky 15917 comparison-by-subtraction pattern that caused bug 21278. 15918 15919 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha): 15920 - The tor-resolve command line tool now rejects hostnames over 255 15921 characters in length. Previously, it would silently truncate them, 15922 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5. 15923 Patch by "junglefowl". 15924 15925 15926Changes in version 0.3.0.3-alpha - 2017-02-03 15927 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the 15928 0.3.0.x development series, including some that could cause 15929 authorities to behave badly. There is also a fix for a longstanding 15930 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also 15931 includes some smaller features and bugfixes. 15932 15933 The Tor 0.3.0.x release series is now in patch-freeze: no additional 15934 features will be considered for inclusion in 0.3.0.x. We suspect that 15935 some bugs will probably remain, however, and we encourage people to 15936 test this release. 15937 15938 o Major bugfixes (directory authority): 15939 - During voting, when marking a relay as a probable sybil, do not 15940 clear its BadExit flag: sybils can still be bad in other ways 15941 too. (We still clear the other flags.) Fixes bug 21108; bugfix 15942 on 0.2.0.13-alpha. 15943 - When deciding whether we have just found a router to be reachable, 15944 do not penalize it for not having performed an Ed25519 link 15945 handshake if it does not claim to support an Ed25519 handshake. 15946 Previously, we would treat such relays as non-running. Fixes bug 15947 21107; bugfix on 0.3.0.1-alpha. 15948 15949 o Major bugfixes (entry guards): 15950 - Stop trying to build circuits through entry guards for which we 15951 have no descriptor. Also, stop crashing in the case that we *do* 15952 accidentally try to build a circuit in such a state. Fixes bug 15953 21242; bugfix on 0.3.0.1-alpha. 15954 15955 o Major bugfixes (IPv6 Exits): 15956 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects 15957 any IPv6 addresses. Instead, only reject a port over IPv6 if the 15958 exit policy rejects that port on more than an IPv6 /16 of 15959 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha, 15960 which rejected a relay's own IPv6 address by default. Fixes bug 15961 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha. 15962 15963 o Minor feature (client): 15964 - Enable IPv6 traffic on the SocksPort by default. To disable this, 15965 a user will have to specify "NoIPv6Traffic". Closes ticket 21269. 15966 15967 o Minor feature (fallback scripts): 15968 - Add a check_existing mode to updateFallbackDirs.py, which checks 15969 if fallbacks in the hard-coded list are working. Closes ticket 15970 20174. Patch by haxxpop. 15971 15972 o Minor features (ciphersuite selection): 15973 - Clients now advertise a list of ciphersuites closer to the ones 15974 preferred by Firefox. Closes part of ticket 15426. 15975 - Allow relays to accept a wider range of ciphersuites, including 15976 chacha20-poly1305 and AES-CCM. Closes the other part of 15426. 15977 15978 o Minor features (controller, configuration): 15979 - Each of the *Port options, such as SocksPort, ORPort, ControlPort, 15980 and so on, now comes with a __*Port variant that will not be saved 15981 to the torrc file by the controller's SAVECONF command. This 15982 change allows TorBrowser to set up a single-use domain socket for 15983 each time it launches Tor. Closes ticket 20956. 15984 - The GETCONF command can now query options that may only be 15985 meaningful in context-sensitive lists. This allows the controller 15986 to query the mixed SocksPort/__SocksPort style options introduced 15987 in feature 20956. Implements ticket 21300. 15988 15989 o Minor features (portability, compilation): 15990 - Autoconf now checks to determine if OpenSSL structures are opaque, 15991 instead of explicitly checking for OpenSSL version numbers. Part 15992 of ticket 21359. 15993 - Support building with recent LibreSSL code that uses opaque 15994 structures. Closes ticket 21359. 15995 15996 o Minor features (relay): 15997 - We now allow separation of exit and relay traffic to different 15998 source IP addresses, using the OutboundBindAddressExit and 15999 OutboundBindAddressOR options respectively. Closes ticket 17975. 16000 Written by Michael Sonntag. 16001 16002 o Minor bugfix (logging): 16003 - Don't recommend the use of Tor2web in non-anonymous mode. 16004 Recommending Tor2web is a bad idea because the client loses all 16005 anonymity. Tor2web should only be used in specific cases by users 16006 who *know* and understand the issues. Fixes bug 21294; bugfix 16007 on 0.2.9.3-alpha. 16008 16009 o Minor bugfixes (client): 16010 - Always recover from failures in extend_info_from_node(), in an 16011 attempt to prevent any recurrence of bug 21242. Fixes bug 21372; 16012 bugfix on 0.2.3.1-alpha. 16013 16014 o Minor bugfixes (client, entry guards): 16015 - Fix a bug warning (with backtrace) when we fail a channel that 16016 circuits to fallback directories on it. Fixes bug 21128; bugfix 16017 on 0.3.0.1-alpha. 16018 - Fix a spurious bug warning (with backtrace) when removing an 16019 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha. 16020 - Fix a bug of the new guard algorithm where tor could stall for up 16021 to 10 minutes before retrying a guard after a long period of no 16022 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha. 16023 - Do not try to build circuits until we have descriptors for our 16024 primary entry guards. Related to fix for bug 21242. 16025 16026 o Minor bugfixes (configure, autoconf): 16027 - Rename the configure option --enable-expensive-hardening to 16028 --enable-fragile-hardening. Expensive hardening makes the tor 16029 daemon abort when some kinds of issues are detected. Thus, it 16030 makes tor more at risk of remote crashes but safer against RCE or 16031 heartbleed bug category. We now try to explain this issue in a 16032 message from the configure script. Fixes bug 21290; bugfix 16033 on 0.2.5.4-alpha. 16034 16035 o Minor bugfixes (controller): 16036 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug 16037 20824; bugfix on 0.3.0.1-alpha. 16038 16039 o Minor bugfixes (hidden service): 16040 - Clean up the code for expiring intro points with no associated 16041 circuits. It was causing, rarely, a service with some expiring 16042 introduction points to not open enough additional introduction 16043 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha. 16044 - Stop setting the torrc option HiddenServiceStatistics to "0" just 16045 because we're not a bridge or relay. Instead, we preserve whatever 16046 value the user set (or didn't set). Fixes bug 21150; bugfix 16047 on 0.2.6.2-alpha. 16048 - Resolve two possible underflows which could lead to creating and 16049 closing a lot of introduction point circuits in a non-stop loop. 16050 Fixes bug 21302; bugfix on 0.2.7.2-alpha. 16051 16052 o Minor bugfixes (portability): 16053 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__". 16054 It is supported by OpenBSD itself, and also by most OpenBSD 16055 variants (such as Bitrig). Fixes bug 20980; bugfix 16056 on 0.1.2.1-alpha. 16057 - When mapping a file of length greater than SIZE_MAX, do not 16058 silently truncate its contents. This issue could occur on 32 bit 16059 systems with large file support and files which are larger than 4 16060 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha. 16061 16062 o Minor bugfixes (tor-resolve): 16063 - The tor-resolve command line tool now rejects hostnames over 255 16064 characters in length. Previously, it would silently truncate them, 16065 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5. 16066 Patch by "junglefowl". 16067 16068 o Minor bugfixes (Windows services): 16069 - Be sure to initialize the monotonic time subsystem before using 16070 it, even when running as an NT service. Fixes bug 21356; bugfix 16071 on 0.2.9.1-alpha. 16072 16073 16074Changes in version 0.3.0.2-alpha - 2017-01-23 16075 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could 16076 cause relays and clients to crash, even if they were not built with 16077 the --enable-expensive-hardening option. This bug affects all 0.2.9.x 16078 versions, and also affects 0.3.0.1-alpha: all relays running an affected 16079 version should upgrade. 16080 16081 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS 16082 time-to-live values, makes directory authorities enforce the 1-to-1 16083 mapping of relay RSA identity keys to ED25519 identity keys, fixes a 16084 client-side onion service reachability bug, does better at selecting 16085 the set of fallback directories, and more. 16086 16087 o Major bugfixes (security, also in 0.2.9.9): 16088 - Downgrade the "-ftrapv" option from "always on" to "only on when 16089 --enable-expensive-hardening is provided." This hardening option, like 16090 others, can turn survivable bugs into crashes--and having it on by 16091 default made a (relatively harmless) integer overflow bug into a 16092 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on 16093 0.2.9.1-alpha. 16094 16095 o Major features (security): 16096 - Change the algorithm used to decide DNS TTLs on client and server 16097 side, to better resist DNS-based correlation attacks like the 16098 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and 16099 Feamster. Now relays only return one of two possible DNS TTL 16100 values, and clients are willing to believe DNS TTL values up to 3 16101 hours long. Closes ticket 19769. 16102 16103 o Major features (directory authority, security): 16104 - The default for AuthDirPinKeys is now 1: directory authorities 16105 will reject relays where the RSA identity key matches a previously 16106 seen value, but the Ed25519 key has changed. Closes ticket 18319. 16107 16108 o Major bugfixes (client, guard, crash): 16109 - In circuit_get_global_origin_list(), return the actual list of 16110 origin circuits. The previous version of this code returned the 16111 list of all the circuits, and could have caused strange bugs, 16112 including possible crashes. Fixes bug 21118; bugfix 16113 on 0.3.0.1-alpha. 16114 16115 o Major bugfixes (client, onion service, also in 0.2.9.9): 16116 - Fix a client-side onion service reachability bug, where multiple 16117 socks requests to an onion service (or a single slow request) 16118 could cause us to mistakenly mark some of the service's 16119 introduction points as failed, and we cache that failure so 16120 eventually we run out and can't reach the service. Also resolves a 16121 mysterious "Remote server sent bogus reason code 65021" log 16122 warning. The bug was introduced in ticket 17218, where we tried to 16123 remember the circuit end reason as a uint16_t, which mangled 16124 negative values. Partially fixes bug 21056 and fixes bug 20307; 16125 bugfix on 0.2.8.1-alpha. 16126 16127 o Major bugfixes (DNS): 16128 - Fix a bug that prevented exit nodes from caching DNS records for 16129 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha. 16130 16131 o Minor features (controller): 16132 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose 16133 shared-random values to the controller. Closes ticket 19925. 16134 16135 o Minor features (entry guards): 16136 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not 16137 break regression tests. 16138 - Require UseEntryGuards when UseBridges is set, in order to make 16139 sure bridges aren't bypassed. Resolves ticket 20502. 16140 16141 o Minor features (fallback directories): 16142 - Select 200 fallback directories for each release. Closes 16143 ticket 20881. 16144 - Allow 3 fallback relays per operator, which is safe now that we 16145 are choosing 200 fallback relays. Closes ticket 20912. 16146 - Exclude relays affected by bug 20499 from the fallback list. 16147 Exclude relays from the fallback list if they are running versions 16148 known to be affected by bug 20499, or if in our tests they deliver 16149 a stale consensus (i.e. one that expired more than 24 hours ago). 16150 Closes ticket 20539. 16151 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of 16152 ticket 18828. 16153 - Require fallback directories to have the same address and port for 16154 7 days (now that we have enough relays with this stability). 16155 Relays whose OnionOO stability timer is reset on restart by bug 16156 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for 16157 this issue. Closes ticket 20880; maintains short-term fix 16158 in 0.2.8.2-alpha. 16159 - Require fallbacks to have flags for 90% of the time (weighted 16160 decaying average), rather than 95%. This allows at least 73% of 16161 clients to bootstrap in the first 5 seconds without contacting an 16162 authority. Part of ticket 18828. 16163 - Annotate updateFallbackDirs.py with the bandwidth and consensus 16164 weight for each candidate fallback. Closes ticket 20878. 16165 - Make it easier to change the output sort order of fallbacks. 16166 Closes ticket 20822. 16167 - Display the relay fingerprint when downloading consensuses from 16168 fallbacks. Closes ticket 20908. 16169 16170 o Minor features (geoip, also in 0.2.9.9): 16171 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2 16172 Country database. 16173 16174 o Minor features (next-gen onion service directories): 16175 - Remove the "EnableOnionServicesV3" consensus parameter that we 16176 introduced in 0.3.0.1-alpha: relays are now always willing to act 16177 as v3 onion service directories. Resolves ticket 19899. 16178 16179 o Minor features (linting): 16180 - Enhance the changes file linter to warn on Tor versions that are 16181 prefixed with "tor-". Closes ticket 21096. 16182 16183 o Minor features (logging): 16184 - In several places, describe unset ed25519 keys as "<unset>", 16185 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037. 16186 16187 o Minor bugfix (control protocol): 16188 - The reply to a "GETINFO config/names" request via the control 16189 protocol now spells the type "Dependent" correctly. This is a 16190 breaking change in the control protocol. (The field seems to be 16191 ignored by the most common known controllers.) Fixes bug 18146; 16192 bugfix on 0.1.1.4-alpha. 16193 16194 o Minor bugfixes (bug resilience): 16195 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug 16196 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by 16197 Hans Jerry Illikainen. 16198 16199 o Minor bugfixes (build): 16200 - Replace obsolete Autoconf macros with their modern equivalent and 16201 prevent similar issues in the future. Fixes bug 20990; bugfix 16202 on 0.1.0.1-rc. 16203 16204 o Minor bugfixes (client, guards): 16205 - Fix bug where Tor would think that there are circuits waiting for 16206 better guards even though those circuits have been freed. Fixes 16207 bug 21142; bugfix on 0.3.0.1-alpha. 16208 16209 o Minor bugfixes (config): 16210 - Don't assert on startup when trying to get the options list and 16211 LearnCircuitBuildTimeout is set to 0: we are currently parsing the 16212 options so of course they aren't ready yet. Fixes bug 21062; 16213 bugfix on 0.2.9.3-alpha. 16214 16215 o Minor bugfixes (controller): 16216 - Make the GETINFO interface for inquiring about entry guards 16217 support the new guards backend. Fixes bug 20823; bugfix 16218 on 0.3.0.1-alpha. 16219 16220 o Minor bugfixes (dead code): 16221 - Remove a redundant check for PidFile changes at runtime in 16222 options_transition_allowed(): this check is already performed 16223 regardless of whether the sandbox is active. Fixes bug 21123; 16224 bugfix on 0.2.5.4-alpha. 16225 16226 o Minor bugfixes (documentation): 16227 - Update the tor manual page to document every option that can not 16228 be changed while tor is running. Fixes bug 21122. 16229 16230 o Minor bugfixes (fallback directories): 16231 - Stop failing when a relay has no uptime data in 16232 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha. 16233 - Avoid checking fallback candidates' DirPorts if they are down in 16234 OnionOO. When a relay operator has multiple relays, this 16235 prioritizes relays that are up over relays that are down. Fixes 16236 bug 20926; bugfix on 0.2.8.3-alpha. 16237 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py. 16238 Fixes bug 20877; bugfix on 0.2.8.3-alpha. 16239 16240 o Minor bugfixes (guards, bootstrapping): 16241 - When connecting to a directory guard during bootstrap, do not mark 16242 the guard as successful until we receive a good-looking directory 16243 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha. 16244 16245 o Minor bugfixes (onion services): 16246 - Fix the config reload pruning of old vs new services so it 16247 actually works when both ephemeral and non-ephemeral services are 16248 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha. 16249 - Allow the number of introduction points to be as low as 0, rather 16250 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha. 16251 16252 o Minor bugfixes (IPv6): 16253 - Make IPv6-using clients try harder to find an IPv6 directory 16254 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha. 16255 - When IPv6 addresses have not been downloaded yet (microdesc 16256 consensus documents don't list relay IPv6 addresses), use hard- 16257 coded addresses for authorities, fallbacks, and configured 16258 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug 16259 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha. 16260 16261 o Minor bugfixes (memory leaks): 16262 - Fix a memory leak when configuring hidden services. Fixes bug 16263 20987; bugfix on 0.3.0.1-alpha. 16264 16265 o Minor bugfixes (portability, also in 0.2.9.9): 16266 - Avoid crashing when Tor is built using headers that contain 16267 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel 16268 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix 16269 on 0.2.9.1-alpha. 16270 - Fix Libevent detection on platforms without Libevent 1 headers 16271 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha. 16272 16273 o Minor bugfixes (relay): 16274 - Honor DataDirectoryGroupReadable when tor is a relay. Previously, 16275 initializing the keys would reset the DataDirectory to 0700 16276 instead of 0750 even if DataDirectoryGroupReadable was set to 1. 16277 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish". 16278 16279 o Minor bugfixes (testing): 16280 - Remove undefined behavior from the backtrace generator by removing 16281 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha. 16282 16283 o Minor bugfixes (unit tests): 16284 - Allow the unit tests to pass even when DNS lookups of bogus 16285 addresses do not fail as expected. Fixes bug 20862 and 20863; 16286 bugfix on unit tests introduced in 0.2.8.1-alpha 16287 through 0.2.9.4-alpha. 16288 16289 o Code simplification and refactoring: 16290 - Refactor code to manipulate global_origin_circuit_list into 16291 separate functions. Closes ticket 20921. 16292 16293 o Documentation (formatting): 16294 - Clean up formatting of tor.1 man page and HTML doc, where <pre> 16295 blocks were incorrectly appearing. Closes ticket 20885. 16296 16297 o Documentation (man page): 16298 - Clarify many options in tor.1 and add some min/max values for 16299 HiddenService options. Closes ticket 21058. 16300 16301 16302Changes in version 0.2.9.9 - 2017-01-23 16303 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could 16304 cause relays and clients to crash, even if they were not built with 16305 the --enable-expensive-hardening option. This bug affects all 0.2.9.x 16306 versions, and also affects 0.3.0.1-alpha: all relays running an affected 16307 version should upgrade. 16308 16309 This release also resolves a client-side onion service reachability 16310 bug, and resolves a pair of small portability issues. 16311 16312 o Major bugfixes (security): 16313 - Downgrade the "-ftrapv" option from "always on" to "only on when 16314 --enable-expensive-hardening is provided." This hardening option, 16315 like others, can turn survivable bugs into crashes -- and having 16316 it on by default made a (relatively harmless) integer overflow bug 16317 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); 16318 bugfix on 0.2.9.1-alpha. 16319 16320 o Major bugfixes (client, onion service): 16321 - Fix a client-side onion service reachability bug, where multiple 16322 socks requests to an onion service (or a single slow request) 16323 could cause us to mistakenly mark some of the service's 16324 introduction points as failed, and we cache that failure so 16325 eventually we run out and can't reach the service. Also resolves a 16326 mysterious "Remote server sent bogus reason code 65021" log 16327 warning. The bug was introduced in ticket 17218, where we tried to 16328 remember the circuit end reason as a uint16_t, which mangled 16329 negative values. Partially fixes bug 21056 and fixes bug 20307; 16330 bugfix on 0.2.8.1-alpha. 16331 16332 o Minor features (geoip): 16333 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2 16334 Country database. 16335 16336 o Minor bugfixes (portability): 16337 - Avoid crashing when Tor is built using headers that contain 16338 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel 16339 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix 16340 on 0.2.9.1-alpha. 16341 - Fix Libevent detection on platforms without Libevent 1 headers 16342 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha. 16343 16344 16345Changes in version 0.3.0.1-alpha - 2016-12-19 16346 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development 16347 series. It strengthens Tor's link and circuit handshakes by 16348 identifying relays by their Ed25519 keys, improves the algorithm that 16349 clients use to choose and maintain their list of guards, and includes 16350 additional backend support for the next-generation hidden service 16351 design. It also contains numerous other small features and 16352 improvements to security, correctness, and performance. 16353 16354 Below are the changes since 0.2.9.8. 16355 16356 o Major features (guard selection algorithm): 16357 - Tor's guard selection algorithm has been redesigned from the 16358 ground up, to better support unreliable networks and restrictive 16359 sets of entry nodes, and to better resist guard-capture attacks by 16360 hostile local networks. Implements proposal 271; closes 16361 ticket 19877. 16362 16363 o Major features (next-generation hidden services): 16364 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by 16365 prop224 aka "Next Generation Hidden Services". Service and clients 16366 don't use this functionality yet. Closes ticket 19043. Based on 16367 initial code by Alec Heifetz. 16368 - Relays now support the HSDir version 3 protocol, so that they can 16369 can store and serve v3 descriptors. This is part of the next- 16370 generation onion service work detailed in proposal 224. Closes 16371 ticket 17238. 16372 16373 o Major features (protocol, ed25519 identity keys): 16374 - Relays now use Ed25519 to prove their Ed25519 identities and to 16375 one another, and to clients. This algorithm is faster and more 16376 secure than the RSA-based handshake we've been doing until now. 16377 Implements the second big part of proposal 220; Closes 16378 ticket 15055. 16379 - Clients now support including Ed25519 identity keys in the EXTEND2 16380 cells they generate. By default, this is controlled by a consensus 16381 parameter, currently disabled. You can turn this feature on for 16382 testing by setting ExtendByEd25519ID in your configuration. This 16383 might make your traffic appear different than the traffic 16384 generated by other users, however. Implements part of ticket 16385 15056; part of proposal 220. 16386 - Relays now understand requests to extend to other relays by their 16387 Ed25519 identity keys. When an Ed25519 identity key is included in 16388 an EXTEND2 cell, the relay will only extend the circuit if the 16389 other relay can prove ownership of that identity. Implements part 16390 of ticket 15056; part of proposal 220. 16391 16392 o Major bugfixes (scheduler): 16393 - Actually compare circuit policies in ewma_cmp_cmux(). This bug 16394 caused the channel scheduler to behave more or less randomly, 16395 rather than preferring channels with higher-priority circuits. 16396 Fixes bug 20459; bugfix on 0.2.6.2-alpha. 16397 16398 o Minor features (controller): 16399 - When HSFETCH arguments cannot be parsed, say "Invalid argument" 16400 rather than "unrecognized." Closes ticket 20389; patch from 16401 Ivan Markin. 16402 16403 o Minor features (diagnostic, directory client): 16404 - Warn when we find an unexpected inconsistency in directory 16405 download status objects. Prevents some negative consequences of 16406 bug 20593. 16407 16408 o Minor features (directory authority): 16409 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by 16410 default) to control whether authorities should try to probe relays 16411 by their Ed25519 link keys. This option will go away in a few 16412 releases--unless we encounter major trouble in our ed25519 link 16413 protocol rollout, in which case it will serve as a safety option. 16414 16415 o Minor features (directory cache): 16416 - Relays and bridges will now refuse to serve the consensus they 16417 have if they know it is too old for a client to use. Closes 16418 ticket 20511. 16419 16420 o Minor features (ed25519 link handshake): 16421 - Advertise support for the ed25519 link handshake using the 16422 subprotocol-versions mechanism, so that clients can tell which 16423 relays can identity themselves by Ed25519 ID. Closes ticket 20552. 16424 16425 o Minor features (fingerprinting resistance, authentication): 16426 - Extend the length of RSA keys used for TLS link authentication to 16427 2048 bits. (These weren't used for forward secrecy; for forward 16428 secrecy, we used P256.) Closes ticket 13752. 16429 16430 o Minor features (infrastructure): 16431 - Implement smartlist_add_strdup() function. Replaces the use of 16432 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048. 16433 16434 o Minor bugfixes (client): 16435 - When clients that use bridges start up with a cached consensus on 16436 disk, they were ignoring it and downloading a new one. Now they 16437 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha. 16438 16439 o Minor bugfixes (configuration): 16440 - Accept non-space whitespace characters after the severity level in 16441 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha. 16442 - Support "TByte" and "TBytes" units in options given in bytes. 16443 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already 16444 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha. 16445 16446 o Minor bugfixes (consensus weight): 16447 - Add new consensus method that initializes bw weights to 1 instead 16448 of 0. This prevents a zero weight from making it all the way to 16449 the end (happens in small testing networks) and causing an error. 16450 Fixes bug 14881; bugfix on 0.2.2.17-alpha. 16451 16452 o Minor bugfixes (descriptors): 16453 - Correctly recognise downloaded full descriptors as valid, even 16454 when using microdescriptors as circuits. This affects clients with 16455 FetchUselessDescriptors set, and may affect directory authorities. 16456 Fixes bug 20839; bugfix on 0.2.3.2-alpha. 16457 16458 o Minor bugfixes (directory system): 16459 - Download all consensus flavors, descriptors, and authority 16460 certificates when FetchUselessDescriptors is set, regardless of 16461 whether tor is a directory cache or not. Fixes bug 20667; bugfix 16462 on all recent tor versions. 16463 - Bridges and relays now use microdescriptors (like clients do) 16464 rather than old-style router descriptors. Now bridges will blend 16465 in with clients in terms of the circuits they build. Fixes bug 16466 6769; bugfix on 0.2.3.2-alpha. 16467 16468 o Minor bugfixes (ed25519 certificates): 16469 - Correctly interpret ed25519 certificates that would expire some 16470 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha. 16471 16472 o Minor bugfixes (hidden services): 16473 - Stop ignoring misconfigured hidden services. Instead, refuse to 16474 start tor until the misconfigurations have been corrected. Fixes 16475 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha 16476 and earlier. 16477 16478 o Minor bugfixes (memory leak at exit): 16479 - Fix a small harmless memory leak at exit of the previously unused 16480 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix 16481 on 0.2.7.2-alpha. 16482 16483 o Minor bugfixes (util): 16484 - When finishing writing a file to disk, if we were about to replace 16485 the file with the temporary file created before and we fail to 16486 replace it, remove the temporary file so it doesn't stay on disk. 16487 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk. 16488 16489 o Minor bugfixes (Windows): 16490 - Check for getpagesize before using it to mmap files. This fixes 16491 compilation in some MinGW environments. Fixes bug 20530; bugfix on 16492 0.1.2.1-alpha. Reported by "ice". 16493 16494 o Code simplification and refactoring: 16495 - Abolish all global guard context in entrynodes.c; replace with new 16496 guard_selection_t structure as preparation for proposal 271. 16497 Closes ticket 19858. 16498 - Introduce rend_service_is_ephemeral() that tells if given onion 16499 service is ephemeral. Replace unclear NULL-checkings for service 16500 directory with this function. Closes ticket 20526. 16501 - Extract magic numbers in circuituse.c into defined variables. 16502 - Refactor circuit_is_available_for_use to remove unnecessary check. 16503 - Refactor circuit_predict_and_launch_new for readability and 16504 testability. Closes ticket 18873. 16505 - Refactor large if statement in purpose_needs_anonymity to use 16506 switch statement instead. Closes part of ticket 20077. 16507 - Refactor the hashing API to return negative values for errors, as 16508 is done as throughout the codebase. Closes ticket 20717. 16509 - Remove data structures that were used to index or_connection 16510 objects by their RSA identity digests. These structures are fully 16511 redundant with the similar structures used in the 16512 channel abstraction. 16513 - Remove duplicate code in the channel_write_*cell() functions. 16514 Closes ticket 13827; patch from Pingl. 16515 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to 16516 use only purpose_needs_anonymity. Closes part of ticket 20077. 16517 - The code to generate and parse EXTEND and EXTEND2 cells has been 16518 replaced with code automatically generated by the 16519 "trunnel" utility. 16520 16521 o Documentation: 16522 - Include the "TBits" unit in Tor's man page. Fixes part of bug 16523 20622; bugfix on 0.2.5.1-alpha. 16524 - Change '1' to 'weight_scale' in consensus bw weights calculation 16525 comments, as that is reality. Closes ticket 20273. Patch 16526 from pastly. 16527 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from 16528 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix 16529 on 0.2.5.6-alpha. 16530 - Stop the man page from incorrectly stating that HiddenServiceDir 16531 must already exist. Fixes 20486. 16532 - Clarify that when ClientRejectInternalAddresses is enabled (which 16533 is the default), multicast DNS hostnames for machines on the local 16534 network (of the form *.local) are also rejected. Closes 16535 ticket 17070. 16536 16537 o Removed features: 16538 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same 16539 limit for relays running on a single IP applies to authority IP 16540 addresses as well as to non-authority IP addresses. Closes 16541 ticket 20960. 16542 - The UseDirectoryGuards torrc option no longer exists: all users 16543 that use entry guards will also use directory guards. Related to 16544 proposal 271; implements part of ticket 20831. 16545 16546 o Testing: 16547 - New unit tests for tor_htonll(). Closes ticket 19563. Patch 16548 from "overcaffeinated". 16549 - Perform the coding style checks when running the tests and fail 16550 when coding style violations are found. Closes ticket 5500. 16551 - Add tests for networkstatus_compute_bw_weights_v10. 16552 - Add unit tests circuit_predict_and_launch_new. 16553 - Extract dummy_origin_circuit_new so it can be used by other 16554 test functions. 16555 16556 16557Changes in version 0.2.8.12 - 2016-12-19 16558 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018 16559 below) where Tor clients could crash when attempting to visit a 16560 hostile hidden service. Clients are recommended to upgrade as packages 16561 become available for their systems. 16562 16563 It also includes an updated list of fallback directories, backported 16564 from 0.2.9. 16565 16566 Now that the Tor 0.2.9 series is stable, only major bugfixes will be 16567 backported to 0.2.8 in the future. 16568 16569 o Major bugfixes (parsing, security, backported from 0.2.9.8): 16570 - Fix a bug in parsing that could cause clients to read a single 16571 byte past the end of an allocated region. This bug could be used 16572 to cause hardened clients (built with --enable-expensive-hardening) 16573 to crash if they tried to visit a hostile hidden service. Non- 16574 hardened clients are only affected depending on the details of 16575 their platform's memory allocator. Fixes bug 21018; bugfix on 16576 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 16577 2016-12-002 and as CVE-2016-1254. 16578 16579 o Minor features (fallback directory list, backported from 0.2.9.8): 16580 - Replace the 81 remaining fallbacks of the 100 originally 16581 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177 16582 fallbacks (123 new, 54 existing, 27 removed) generated in December 16583 2016. Resolves ticket 20170. 16584 16585 o Minor features (geoip, backported from 0.2.9.7-rc): 16586 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2 16587 Country database. 16588 16589 16590Changes in version 0.2.9.8 - 2016-12-19 16591 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series. 16592 16593 The Tor 0.2.9 series makes mandatory a number of security features 16594 that were formerly optional. It includes support for a new shared- 16595 randomness protocol that will form the basis for next generation 16596 hidden services, includes a single-hop hidden service mode for 16597 optimizing .onion services that don't actually want to be hidden, 16598 tries harder not to overload the directory authorities with excessive 16599 downloads, and supports a better protocol versioning scheme for 16600 improved compatibility with other implementations of the Tor protocol. 16601 16602 And of course, there are numerous other bugfixes and improvements. 16603 16604 This release also includes a fix for a medium-severity issue (bug 16605 21018 below) where Tor clients could crash when attempting to visit a 16606 hostile hidden service. Clients are recommended to upgrade as packages 16607 become available for their systems. 16608 16609 Below are the changes since 0.2.9.7-rc. For a list of all changes 16610 since 0.2.8, see the ReleaseNotes file. 16611 16612 o Major bugfixes (parsing, security): 16613 - Fix a bug in parsing that could cause clients to read a single 16614 byte past the end of an allocated region. This bug could be used 16615 to cause hardened clients (built with --enable-expensive-hardening) 16616 to crash if they tried to visit a hostile hidden service. Non- 16617 hardened clients are only affected depending on the details of 16618 their platform's memory allocator. Fixes bug 21018; bugfix on 16619 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE- 16620 2016-12-002 and as CVE-2016-1254. 16621 16622 o Minor features (fallback directory list): 16623 - Replace the 81 remaining fallbacks of the 100 originally 16624 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177 16625 fallbacks (123 new, 54 existing, 27 removed) generated in December 16626 2016. Resolves ticket 20170. 16627 16628 16629Changes in version 0.2.9.7-rc - 2016-12-12 16630 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc, 16631 including a few that had prevented tests from passing on 16632 some platforms. 16633 16634 o Minor features (geoip): 16635 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2 16636 Country database. 16637 16638 o Minor bugfix (build): 16639 - The current Git revision when building from a local repository is 16640 now detected correctly when using git worktrees. Fixes bug 20492; 16641 bugfix on 0.2.3.9-alpha. 16642 16643 o Minor bugfixes (directory authority): 16644 - When computing old Tor protocol line version in protover, we were 16645 looking at 0.2.7.5 twice instead of a specific case for 16646 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha. 16647 16648 o Minor bugfixes (download scheduling): 16649 - Resolve a "bug" warning when considering a download schedule whose 16650 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha. 16651 16652 o Minor bugfixes (logging): 16653 - Downgrade a harmless log message about the 16654 pending_entry_connections list from "warn" to "info". Mitigates 16655 bug 19926. 16656 16657 o Minor bugfixes (memory leak): 16658 - Fix a small memory leak when receiving AF_UNIX connections on a 16659 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha. 16660 - When moving a signed descriptor object from a source to an 16661 existing destination, free the allocated memory inside that 16662 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha. 16663 16664 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox): 16665 - Fix a memory leak and use-after-free error when removing entries 16666 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on 16667 0.2.5.5-alpha. Patch from "cypherpunks". 16668 16669 o Minor bugfixes (portability): 16670 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac 16671 Fixes bug 20935; bugfix on 0.2.9.6-rc. 16672 16673 o Minor bugfixes (unit tests): 16674 - Stop expecting NetBSD unit tests to report success for ipfw. Part 16675 of a fix for bug 19960; bugfix on 0.2.9.5-alpha. 16676 - Fix tolerances in unit tests for monotonic time comparisons 16677 between nanoseconds and microseconds. Previously, we accepted a 10 16678 us difference only, which is not realistic on every platform's 16679 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha. 16680 - Remove a double-free in the single onion service unit test. Stop 16681 ignoring a return value. Make future changes less error-prone. 16682 Fixes bug 20864; bugfix on 0.2.9.6-rc. 16683 16684 16685Changes in version 0.2.8.11 - 2016-12-08 16686 Tor 0.2.8.11 backports fixes for additional portability issues that 16687 could prevent Tor from building correctly on OSX Sierra, or with 16688 OpenSSL 1.1. Affected users should upgrade; others can safely stay 16689 with 0.2.8.10. 16690 16691 o Minor bugfixes (portability): 16692 - Avoid compilation errors when building on OSX Sierra. Sierra began 16693 to support the getentropy() and clock_gettime() APIs, but created 16694 a few problems in doing so. Tor 0.2.9 has a more thorough set of 16695 workarounds; in 0.2.8, we are just using the /dev/urandom and mach 16696 monotonic time interfaces. Fixes bug 20865. Bugfix 16697 on 0.2.8.1-alpha. 16698 16699 o Minor bugfixes (portability, backport from 0.2.9.5-alpha): 16700 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU 16701 architectures. Closes ticket 20588. 16702 16703 16704Changes in version 0.2.8.10 - 2016-12-02 16705 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients 16706 unusable after they left standby mode. It also backports fixes for 16707 a few portability issues and a small but problematic memory leak. 16708 16709 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha): 16710 - When Tor leaves standby because of a new application request, open 16711 circuits as needed to serve that request. Previously, we would 16712 potentially wait a very long time. Fixes part of bug 19969; bugfix 16713 on 0.2.8.1-alpha. 16714 16715 o Major bugfixes (client performance, backport from 0.2.9.5-alpha): 16716 - Clients now respond to new application stream requests immediately 16717 when they arrive, rather than waiting up to one second before 16718 starting to handle them. Fixes part of bug 19969; bugfix 16719 on 0.2.8.1-alpha. 16720 16721 o Minor bugfixes (portability, backport from 0.2.9.6-rc): 16722 - Work around a bug in the OSX 10.12 SDK that would prevent us from 16723 successfully targeting earlier versions of OSX. Resolves 16724 ticket 20235. 16725 16726 o Minor bugfixes (portability, backport from 0.2.9.5-alpha): 16727 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug 16728 20551; bugfix on 0.2.1.1-alpha. 16729 16730 o Minor bugfixes (relay, backport from 0.2.9.5-alpha): 16731 - Work around a memory leak in OpenSSL 1.1 when encoding public 16732 keys. Fixes bug 20553; bugfix on 0.0.2pre8. 16733 16734 o Minor features (geoip): 16735 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2 16736 Country database. 16737 16738Changes in version 0.2.9.6-rc - 2016-12-02 16739 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha 16740 version. We hope that it will be ready to become stable soon, and we 16741 encourage everyone to test this release. If no showstopper bugs are 16742 found here, the next 0.2.9 release will be stable. 16743 16744 o Major bugfixes (relay, resolver, logging): 16745 - For relays that don't know their own address, avoid attempting a 16746 local hostname resolve for each descriptor we download. This 16747 will cut down on the number of "Success: chose address 'x.x.x.x'" 16748 log lines, and also avoid confusing clock jumps if the resolver 16749 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha. 16750 16751 o Minor bugfixes (client, fascistfirewall): 16752 - Avoid spurious warnings when ReachableAddresses or FascistFirewall 16753 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha. 16754 16755 o Minor bugfixes (hidden services): 16756 - Stop ignoring the anonymity status of saved keys for hidden 16757 services and single onion services when first starting tor. 16758 Instead, refuse to start tor if any hidden service key has been 16759 used in a different hidden service anonymity mode. Fixes bug 16760 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf. 16761 16762 o Minor bugfixes (portability): 16763 - Work around a bug in the OSX 10.12 SDK that would prevent us from 16764 successfully targeting earlier versions of OSX. Resolves 16765 ticket 20235. 16766 - Run correctly when built on Windows build environments that 16767 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha. 16768 16769 o Minor bugfixes (single onion services, Tor2web): 16770 - Stop complaining about long-term one-hop circuits deliberately 16771 created by single onion services and Tor2web. These log messages 16772 are intended to diagnose issue 8387, which relates to circuits 16773 hanging around forever for no reason. Fixes bug 20613; bugfix on 16774 0.2.9.1-alpha. Reported by "pastly". 16775 16776 o Minor bugfixes (unit tests): 16777 - Stop spurious failures in the local interface address discovery 16778 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by 16779 Neel Chauhan. 16780 16781 o Documentation: 16782 - Correct the minimum bandwidth value in torrc.sample, and queue a 16783 corresponding change for torrc.minimal. Closes ticket 20085. 16784 16785 16786Changes in version 0.2.9.5-alpha - 2016-11-08 16787 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha 16788 version. We believe one or two probably remain, and we encourage 16789 everyone to test this release. 16790 16791 o Major bugfixes (client performance): 16792 - Clients now respond to new application stream requests immediately 16793 when they arrive, rather than waiting up to one second before 16794 starting to handle them. Fixes part of bug 19969; bugfix 16795 on 0.2.8.1-alpha. 16796 16797 o Major bugfixes (client reliability): 16798 - When Tor leaves standby because of a new application request, open 16799 circuits as needed to serve that request. Previously, we would 16800 potentially wait a very long time. Fixes part of bug 19969; bugfix 16801 on 0.2.8.1-alpha. 16802 16803 o Major bugfixes (download scheduling): 16804 - When using an exponential backoff schedule, do not give up on 16805 downloading just because we have failed a bunch of times. Since 16806 each delay is longer than the last, retrying indefinitely won't 16807 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha. 16808 - If a consensus expires while we are waiting for certificates to 16809 download, stop waiting for certificates. 16810 - If we stop waiting for certificates less than a minute after we 16811 started downloading them, do not consider the certificate download 16812 failure a separate failure. Fixes bug 20533; bugfix 16813 on 0.2.0.9-alpha. 16814 - Remove the maximum delay on exponential-backoff scheduling. Since 16815 we now allow an infinite number of failures (see ticket 20536), we 16816 must now allow the time to grow longer on each failure. Fixes part 16817 of bug 20534; bugfix on 0.2.9.1-alpha. 16818 - Make our initial download delays closer to those from 0.2.8. Fixes 16819 another part of bug 20534; bugfix on 0.2.9.1-alpha. 16820 - When determining when to download a directory object, handle times 16821 after 2038 if the operating system supports them. (Someday this 16822 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha. 16823 - When using exponential backoff in test networks, use a lower 16824 exponent, so the delays do not vary as much. This helps test 16825 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499. 16826 16827 o Minor features (geoip): 16828 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2 16829 Country database. 16830 16831 o Minor bugfixes (client directory scheduling): 16832 - Treat "relay too busy to answer request" as a failed request and a 16833 reason to back off on our retry frequency. This is safe now that 16834 exponential backoffs retry indefinitely, and avoids a bug where we 16835 would reset our download schedule erroneously. Fixes bug 20593; 16836 bugfix on 0.2.9.1-alpha. 16837 16838 o Minor bugfixes (client, logging): 16839 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead, 16840 assume all nodes support EXTEND2. Use ntor whenever a key is 16841 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha. 16842 - On DNSPort, stop logging a BUG warning on a failed hostname 16843 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha. 16844 16845 o Minor bugfixes (hidden services): 16846 - When configuring hidden services, check every hidden service 16847 directory's permissions. Previously, we only checked the last 16848 hidden service. Fixes bug 20529; bugfix the work to fix 13942 16849 in 0.2.6.2-alpha. 16850 16851 o Minor bugfixes (portability): 16852 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU 16853 architectures. Closes ticket 20588. 16854 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has 16855 removed the ECDH ciphers which caused the tests to fail on 16856 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha. 16857 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug 16858 20551; bugfix on 0.2.1.1-alpha. 16859 16860 o Minor bugfixes (relay bootstrap): 16861 - Ensure relays don't make multiple connections during bootstrap. 16862 Fixes bug 20591; bugfix on 0.2.8.1-alpha. 16863 16864 o Minor bugfixes (relay): 16865 - Work around a memory leak in OpenSSL 1.1 when encoding public 16866 keys. Fixes bug 20553; bugfix on 0.0.2pre8. 16867 - Avoid a small memory leak when informing worker threads about 16868 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha. 16869 - Do not try to parallelize workers more than 16x without the user 16870 explicitly configuring us to do so, even if we do detect more than 16871 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha. 16872 16873 o Minor bugfixes (single onion services): 16874 - Start correctly when creating a single onion service in a 16875 directory that did not previously exist. Fixes bug 20484; bugfix 16876 on 0.2.9.3-alpha. 16877 16878 o Minor bugfixes (testing): 16879 - Avoid a unit test failure on systems with over 16 detectable CPU 16880 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha. 16881 16882 o Documentation: 16883 - Clarify that setting HiddenServiceNonAnonymousMode requires you to 16884 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha. 16885 - Module-level documentation for several more modules. Closes 16886 tickets 19287 and 19290. 16887 16888 16889Changes in version 0.2.8.9 - 2016-10-17 16890 Tor 0.2.8.9 backports a fix for a security hole in previous versions 16891 of Tor that would allow a remote attacker to crash a Tor client, 16892 hidden service, relay, or authority. All Tor users should upgrade to 16893 this version, or to 0.2.9.4-alpha. Patches will be released for older 16894 versions of Tor. 16895 16896 o Major features (security fixes, also in 0.2.9.4-alpha): 16897 - Prevent a class of security bugs caused by treating the contents 16898 of a buffer chunk as if they were a NUL-terminated string. At 16899 least one such bug seems to be present in all currently used 16900 versions of Tor, and would allow an attacker to remotely crash 16901 most Tor instances, especially those compiled with extra compiler 16902 hardening. With this defense in place, such bugs can't crash Tor, 16903 though we should still fix them as they occur. Closes ticket 16904 20384 (TROVE-2016-10-001). 16905 16906 o Minor features (geoip): 16907 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2 16908 Country database. 16909 16910 16911Changes in version 0.2.9.4-alpha - 2016-10-17 16912 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor 16913 that would allow a remote attacker to crash a Tor client, hidden 16914 service, relay, or authority. All Tor users should upgrade to this 16915 version, or to 0.2.8.9. Patches will be released for older versions 16916 of Tor. 16917 16918 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to 16919 previous versions of Tor, including the implementation of a feature to 16920 future- proof the Tor ecosystem against protocol changes, some bug 16921 fixes necessary for Tor Browser to use unix domain sockets correctly, 16922 and several portability improvements. We anticipate that this will be 16923 the last alpha in the Tor 0.2.9 series, and that the next release will 16924 be a release candidate. 16925 16926 o Major features (security fixes): 16927 - Prevent a class of security bugs caused by treating the contents 16928 of a buffer chunk as if they were a NUL-terminated string. At 16929 least one such bug seems to be present in all currently used 16930 versions of Tor, and would allow an attacker to remotely crash 16931 most Tor instances, especially those compiled with extra compiler 16932 hardening. With this defense in place, such bugs can't crash Tor, 16933 though we should still fix them as they occur. Closes ticket 16934 20384 (TROVE-2016-10-001). 16935 16936 o Major features (subprotocol versions): 16937 - Tor directory authorities now vote on a set of recommended 16938 subprotocol versions, and on a set of required subprotocol 16939 versions. Clients and relays that lack support for a _required_ 16940 subprotocol version will not start; those that lack support for a 16941 _recommended_ subprotocol version will warn the user to upgrade. 16942 Closes ticket 19958; implements part of proposal 264. 16943 - Tor now uses "subprotocol versions" to indicate compatibility. 16944 Previously, versions of Tor looked at the declared Tor version of 16945 a relay to tell whether they could use a given feature. Now, they 16946 should be able to rely on its declared subprotocol versions. This 16947 change allows compatible implementations of the Tor protocol(s) to 16948 exist without pretending to be 100% bug-compatible with particular 16949 releases of Tor itself. Closes ticket 19958; implements part of 16950 proposal 264. 16951 16952 o Minor feature (fallback directories): 16953 - Remove broken fallbacks from the hard-coded fallback directory 16954 list. Closes ticket 20190; patch by teor. 16955 16956 o Minor features (client, directory): 16957 - Since authorities now omit all routers that lack the Running and 16958 Valid flags, we assume that any relay listed in the consensus must 16959 have those flags. Closes ticket 20001; implements part of 16960 proposal 272. 16961 16962 o Minor features (compilation, portability): 16963 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes 16964 ticket 20241. 16965 16966 o Minor features (development tools, etags): 16967 - Teach the "make tags" Makefile target how to correctly find 16968 "MOCK_IMPL" function definitions. Patch from nherring; closes 16969 ticket 16869. 16970 16971 o Minor features (geoip): 16972 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2 16973 Country database. 16974 16975 o Minor features (unix domain sockets): 16976 - When configuring a unix domain socket for a SocksPort, 16977 ControlPort, or Hidden service, you can now wrap the address in 16978 quotes, using C-style escapes inside the quotes. This allows unix 16979 domain socket paths to contain spaces. 16980 16981 o Minor features (virtual addresses): 16982 - Increase the maximum number of bits for the IPv6 virtual network 16983 prefix from 16 to 104. In this way, the condition for address 16984 allocation is less restrictive. Closes ticket 20151; feature 16985 on 0.2.4.7-alpha. 16986 16987 o Minor bugfixes (address discovery): 16988 - Stop reordering IP addresses returned by the OS. This makes it 16989 more likely that Tor will guess the same relay IP address every 16990 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027. 16991 Reported by René Mayrhofer, patch by "cypherpunks". 16992 16993 o Minor bugfixes (client, unix domain sockets): 16994 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as 16995 the client address is meaningless. Fixes bug 20261; bugfix 16996 on 0.2.6.3-alpha. 16997 16998 o Minor bugfixes (compilation, OpenBSD): 16999 - Detect Libevent2 functions correctly on systems that provide 17000 libevent2, but where libevent1 is linked with -levent. Fixes bug 17001 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate. 17002 17003 o Minor bugfixes (configuration): 17004 - When parsing quoted configuration values from the torrc file, 17005 handle windows line endings correctly. Fixes bug 19167; bugfix on 17006 0.2.0.16-alpha. Patch from "Pingl". 17007 17008 o Minor bugfixes (getpass): 17009 - Defensively fix a non-triggerable heap corruption at do_getpass() 17010 to protect ourselves from mistakes in the future. Fixes bug 17011 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch 17012 by nherring. 17013 17014 o Minor bugfixes (hidden service): 17015 - Allow hidden services to run on IPv6 addresses even when the 17016 IPv6Exit option is not set. Fixes bug 18357; bugfix 17017 on 0.2.4.7-alpha. 17018 17019 o Documentation: 17020 - Add module-level internal documentation for 36 C files that 17021 previously didn't have a high-level overview. Closes ticket #20385. 17022 17023 o Required libraries: 17024 - When building with OpenSSL, Tor now requires version 1.0.1 or 17025 later. OpenSSL 1.0.0 and earlier are no longer supported by the 17026 OpenSSL team, and should not be used. Closes ticket 20303. 17027 17028 17029Changes in version 0.2.9.3-alpha - 2016-09-23 17030 Tor 0.2.9.3-alpha adds improved support for entities that want to make 17031 high-performance services available through the Tor .onion mechanism 17032 without themselves receiving anonymity as they host those services. It 17033 also tries harder to ensure that all steps on a circuit are using the 17034 strongest crypto possible, strengthens some TLS properties, and 17035 resolves several bugs -- including a pair of crash bugs from the 0.2.8 17036 series. Anybody running an earlier version of 0.2.9.x should upgrade. 17037 17038 o Major bugfixes (crash, also in 0.2.8.8): 17039 - Fix a complicated crash bug that could affect Tor clients 17040 configured to use bridges when replacing a networkstatus consensus 17041 in which one of their bridges was mentioned. OpenBSD users saw 17042 more crashes here, but all platforms were potentially affected. 17043 Fixes bug 20103; bugfix on 0.2.8.2-alpha. 17044 17045 o Major bugfixes (relay, OOM handler, also in 0.2.8.8): 17046 - Fix a timing-dependent assertion failure that could occur when we 17047 tried to flush from a circuit after having freed its cells because 17048 of an out-of-memory condition. Fixes bug 20203; bugfix on 17049 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing 17050 this one. 17051 17052 o Major features (circuit building, security): 17053 - Authorities, relays and clients now require ntor keys in all 17054 descriptors, for all hops (except for rare hidden service protocol 17055 cases), for all circuits, and for all other roles. Part of 17056 ticket 19163. 17057 - Tor authorities, relays, and clients only use ntor, except for 17058 rare cases in the hidden service protocol. Part of ticket 19163. 17059 17060 o Major features (single-hop "hidden" services): 17061 - Add experimental HiddenServiceSingleHopMode and 17062 HiddenServiceNonAnonymousMode options. When both are set to 1, 17063 every hidden service on a Tor instance becomes a non-anonymous 17064 Single Onion Service. Single Onions make one-hop (direct) 17065 connections to their introduction and rendezvous points. One-hop 17066 circuits make Single Onion servers easily locatable, but clients 17067 remain location-anonymous. This is compatible with the existing 17068 hidden service implementation, and works on the current tor 17069 network without any changes to older relays or clients. Implements 17070 proposal 260, completes ticket 17178. Patch by teor and asn. 17071 17072 o Major features (resource management): 17073 - Tor can now notice it is about to run out of sockets, and 17074 preemptively close connections of lower priority. (This feature is 17075 off by default for now, since the current prioritizing method is 17076 yet not mature enough. You can enable it by setting 17077 "DisableOOSCheck 0", but watch out: it might close some sockets 17078 you would rather have it keep.) Closes ticket 18640. 17079 17080 o Major bugfixes (circuit building): 17081 - Hidden service client-to-intro-point and service-to-rendezvous- 17082 point circuits use the TAP key supplied by the protocol, to avoid 17083 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc. 17084 17085 o Major bugfixes (compilation, OpenBSD): 17086 - Fix a Libevent-detection bug in our autoconf script that would 17087 prevent Tor from linking successfully on OpenBSD. Patch from 17088 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha. 17089 17090 o Major bugfixes (hidden services): 17091 - Clients now require hidden services to include the TAP keys for 17092 their intro points in the hidden service descriptor. This prevents 17093 an inadvertent upgrade to ntor, which a malicious hidden service 17094 could use to distinguish clients by consensus version. Fixes bug 17095 20012; bugfix on 0.2.4.8-alpha. Patch by teor. 17096 17097 o Minor features (security, TLS): 17098 - Servers no longer support clients that without AES ciphersuites. 17099 (3DES is no longer considered an acceptable cipher.) We believe 17100 that no such Tor clients currently exist, since Tor has required 17101 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998. 17102 17103 o Minor feature (fallback directories): 17104 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the 17105 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March 17106 2016. Closes ticket 20190; patch by teor. 17107 17108 o Minor features (geoip, also in 0.2.8.8): 17109 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2 17110 Country database. 17111 17112 o Minor feature (port flags): 17113 - Add new flags to the *Port options to finer control over which 17114 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic, 17115 and the synthetic flag OnionTrafficOnly, which is equivalent to 17116 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement 17117 18693; patch by "teor". 17118 17119 o Minor features (directory authority): 17120 - After voting, if the authorities decide that a relay is not 17121 "Valid", they no longer include it in the consensus at all. Closes 17122 ticket 20002; implements part of proposal 272. 17123 17124 o Minor features (testing): 17125 - Disable memory protections on OpenBSD when performing our unit 17126 tests for memwipe(). The test deliberately invokes undefined 17127 behavior, and the OpenBSD protections interfere with this. Patch 17128 from "rubiate". Closes ticket 20066. 17129 17130 o Minor features (testing, ipv6): 17131 - Add the single-onion and single-onion-ipv6 chutney targets to 17132 "make test-network-all". This requires a recent chutney version 17133 with the single onion network flavours (git c72a652 or later). 17134 Closes ticket 20072; patch by teor. 17135 - Add the hs-ipv6 chutney target to make test-network-all's IPv6 17136 tests. Remove bridges+hs, as it's somewhat redundant. This 17137 requires a recent chutney version that supports IPv6 clients, 17138 relays, and authorities. Closes ticket 20069; patch by teor. 17139 17140 o Minor features (Tor2web): 17141 - Make Tor2web clients respect ReachableAddresses. This feature was 17142 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on 17143 0.2.8.7. Implements feature 20034. Patch by teor. 17144 17145 o Minor features (unit tests): 17146 - We've done significant work to make the unit tests run faster. 17147 - Our link-handshake unit tests now check that when invalid 17148 handshakes fail, they fail with the error messages we expected. 17149 - Our unit testing code that captures log messages no longer 17150 prevents them from being written out if the user asked for them 17151 (by passing --debug or --info or or --notice --warn to the "test" 17152 binary). This change prevents us from missing unexpected log 17153 messages simply because we were looking for others. Related to 17154 ticket 19999. 17155 - The unit tests now log all warning messages with the "BUG" flag. 17156 Previously, they only logged errors by default. This change will 17157 help us make our testing code more correct, and make sure that we 17158 only hit this code when we mean to. In the meantime, however, 17159 there will be more warnings in the unit test logs than before. 17160 This is preparatory work for ticket 19999. 17161 - The unit tests now treat any failure of a "tor_assert_nonfatal()" 17162 assertion as a test failure. 17163 17164 o Minor bug fixes (circuits): 17165 - Use the CircuitBuildTimeout option whenever 17166 LearnCircuitBuildTimeout is disabled. Previously, we would respect 17167 the option when a user disabled it, but not when it was disabled 17168 because some other option was set. Fixes bug 20073; bugfix on 17169 0.2.4.12-alpha. Patch by teor. 17170 17171 o Minor bugfixes (allocation): 17172 - Change how we allocate memory for large chunks on buffers, to 17173 avoid a (currently impossible) integer overflow, and to waste less 17174 space when allocating unusually large chunks. Fixes bug 20081; 17175 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken. 17176 - Always include orconfig.h before including any other C headers. 17177 Sometimes, it includes macros that affect the behavior of the 17178 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the 17179 first version to use AC_USE_SYSTEM_EXTENSIONS). 17180 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC- 17181 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha. 17182 Patch from Gisle Vanem. 17183 - Stop trying to build with Clang 4.0's -Wthread-safety warnings. 17184 They apparently require a set of annotations that we aren't 17185 currently using, and they create false positives in our pthreads 17186 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha. 17187 17188 o Minor bugfixes (directory authority): 17189 - Die with a more useful error when the operator forgets to place 17190 the authority_signing_key file into the keys directory. This 17191 avoids an uninformative assert & traceback about having an invalid 17192 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha. 17193 - When allowing private addresses, mark Exits that only exit to 17194 private locations as such. Fixes bug 20064; bugfix 17195 on 0.2.2.9-alpha. 17196 17197 o Minor bugfixes (documentation): 17198 - Document the default PathsNeededToBuildCircuits value that's used 17199 by clients when the directory authorities don't set 17200 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02 17201 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V. 17202 - Fix manual for the User option: it takes a username, not a UID. 17203 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have 17204 a manpage!). 17205 17206 o Minor bugfixes (hidden services): 17207 - Stop logging intro point details to the client log on certain 17208 error conditions. Fixed as part of bug 20012; bugfix on 17209 0.2.4.8-alpha. Patch by teor. 17210 17211 o Minor bugfixes (IPv6, testing): 17212 - Check for IPv6 correctly on Linux when running test networks. 17213 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor. 17214 17215 o Minor bugfixes (Linux seccomp2 sandbox): 17216 - Add permission to run the sched_yield() and sigaltstack() system 17217 calls, in order to support versions of Tor compiled with asan or 17218 ubsan code that use these calls. Now "sandbox 1" and 17219 "--enable-expensive-hardening" should be compatible on more 17220 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha. 17221 17222 o Minor bugfixes (logging): 17223 - When logging a message from the BUG() macro, be explicit about 17224 what we were asserting. Previously we were confusing what we were 17225 asserting with what the bug was. Fixes bug 20093; bugfix 17226 on 0.2.9.1-alpha. 17227 - When we are unable to remove the bw_accounting file, do not warn 17228 if the reason we couldn't remove it was that it didn't exist. 17229 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'. 17230 17231 o Minor bugfixes (option parsing): 17232 - Count unix sockets when counting client listeners (SOCKS, Trans, 17233 NATD, and DNS). This has no user-visible behaviour changes: these 17234 options are set once, and never read. Required for correct 17235 behaviour in ticket 17178. Fixes bug 19677; bugfix on 17236 0.2.6.3-alpha. Patch by teor. 17237 17238 o Minor bugfixes (options): 17239 - Check the consistency of UseEntryGuards and EntryNodes more 17240 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch 17241 by teor. 17242 - Stop changing the configured value of UseEntryGuards on 17243 authorities and Tor2web clients. Fixes bug 20074; bugfix on 17244 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha. 17245 Patch by teor. 17246 17247 o Minor bugfixes (Tor2web): 17248 - Prevent Tor2web clients running hidden services, these services 17249 are not anonymous due to the one-hop client paths. Fixes bug 17250 19678. Patch by teor. 17251 17252 o Minor bugfixes (unit tests): 17253 - Fix a shared-random unit test that was failing on big endian 17254 architectures due to internal representation of a integer copied 17255 to a buffer. The test is changed to take a full 32 bytes of data 17256 and use the output of a python script that make the COMMIT and 17257 REVEAL calculation according to the spec. Fixes bug 19977; bugfix 17258 on 0.2.9.1-alpha. 17259 - The tor_tls_server_info_callback unit test no longer crashes when 17260 debug-level logging is turned on. Fixes bug 20041; bugfix 17261 on 0.2.8.1-alpha. 17262 17263 17264Changes in version 0.2.8.8 - 2016-09-23 17265 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the 17266 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users 17267 who select public relays as their bridges. 17268 17269 o Major bugfixes (crash): 17270 - Fix a complicated crash bug that could affect Tor clients 17271 configured to use bridges when replacing a networkstatus consensus 17272 in which one of their bridges was mentioned. OpenBSD users saw 17273 more crashes here, but all platforms were potentially affected. 17274 Fixes bug 20103; bugfix on 0.2.8.2-alpha. 17275 17276 o Major bugfixes (relay, OOM handler): 17277 - Fix a timing-dependent assertion failure that could occur when we 17278 tried to flush from a circuit after having freed its cells because 17279 of an out-of-memory condition. Fixes bug 20203; bugfix on 17280 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing 17281 this one. 17282 17283 o Minor feature (fallback directories): 17284 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the 17285 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March 17286 2016. Closes ticket 20190; patch by teor. 17287 17288 o Minor features (geoip): 17289 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2 17290 Country database. 17291 17292 17293Changes in version 0.2.9.2-alpha - 2016-08-24 17294 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with 17295 several new features and bugfixes. It also includes an important 17296 authority update and an important bugfix from 0.2.8.7. Everyone who 17297 sets the ReachableAddresses option, and all bridges, are strongly 17298 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha. 17299 17300 o Directory authority changes (also in 0.2.8.7): 17301 - The "Tonga" bridge authority has been retired; the new bridge 17302 authority is "Bifroest". Closes tickets 19728 and 19690. 17303 17304 o Major bugfixes (client, security, also in 0.2.8.7): 17305 - Only use the ReachableAddresses option to restrict the first hop 17306 in a path. In earlier versions of 0.2.8.x, it would apply to 17307 every hop in the path, with a possible degradation in anonymity 17308 for anyone using an uncommon ReachableAddress setting. Fixes bug 17309 19973; bugfix on 0.2.8.2-alpha. 17310 17311 o Major features (user interface): 17312 - Tor now supports the ability to declare options deprecated, so 17313 that we can recommend that people stop using them. Previously, 17314 this was done in an ad-hoc way. Closes ticket 19820. 17315 17316 o Major bugfixes (directory downloads): 17317 - Avoid resetting download status for consensuses hourly, since we 17318 already have another, smarter retry mechanism. Fixes bug 8625; 17319 bugfix on 0.2.0.9-alpha. 17320 17321 o Minor features (config): 17322 - Warn users when descriptor and port addresses are inconsistent. 17323 Mitigates bug 13953; patch by teor. 17324 17325 o Minor features (geoip): 17326 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2 17327 Country database. 17328 17329 o Minor features (user interface): 17330 - There is a new --list-deprecated-options command-line option to 17331 list all of the deprecated options. Implemented as part of 17332 ticket 19820. 17333 17334 o Minor bugfixes (code style): 17335 - Fix an integer signedness conversion issue in the case conversion 17336 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha. 17337 17338 o Minor bugfixes (compilation): 17339 - Build correctly on versions of libevent2 without support for 17340 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix 17341 on 0.2.5.4-alpha. 17342 - Fix a compilation warning on GCC versions before 4.6. Our 17343 ENABLE_GCC_WARNING macro used the word "warning" as an argument, 17344 when it is also required as an argument to the compiler pragma. 17345 Fixes bug 19901; bugfix on 0.2.9.1-alpha. 17346 17347 o Minor bugfixes (compilation, also in 0.2.8.7): 17348 - Remove an inappropriate "inline" in tortls.c that was causing 17349 warnings on older versions of GCC. Fixes bug 19903; bugfix 17350 on 0.2.8.1-alpha. 17351 17352 o Minor bugfixes (fallback directories, also in 0.2.8.7): 17353 - Avoid logging a NULL string pointer when loading fallback 17354 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha 17355 and 0.2.8.1-alpha. Report and patch by "rubiate". 17356 17357 o Minor bugfixes (logging): 17358 - Log a more accurate message when we fail to dump a microdescriptor. 17359 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto. 17360 17361 o Minor bugfixes (memory leak): 17362 - Fix a series of slow memory leaks related to parsing torrc files 17363 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha. 17364 17365 o Deprecated features: 17366 - A number of DNS-cache-related sub-options for client ports are now 17367 deprecated for security reasons, and may be removed in a future 17368 version of Tor. (We believe that client-side DNS caching is a bad 17369 idea for anonymity, and you should not turn it on.) The options 17370 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache, 17371 UseIPv4Cache, and UseIPv6Cache. 17372 - A number of options are deprecated for security reasons, and may 17373 be removed in a future version of Tor. The options are: 17374 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits, 17375 AllowSingleHopExits, ClientDNSRejectInternalAddresses, 17376 CloseHSClientCircuitsImmediatelyOnTimeout, 17377 CloseHSServiceRendCircuitsImmediatelyOnTimeout, 17378 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup, 17379 UseNTorHandshake, and WarnUnsafeSocks. 17380 - The *ListenAddress options are now deprecated as unnecessary: the 17381 corresponding *Port options should be used instead. These options 17382 may someday be removed. The affected options are: 17383 ControlListenAddress, DNSListenAddress, DirListenAddress, 17384 NATDListenAddress, ORListenAddress, SocksListenAddress, 17385 and TransListenAddress. 17386 17387 o Documentation: 17388 - Correct the IPv6 syntax in our documentation for the 17389 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743. 17390 17391 o Removed code: 17392 - We no longer include the (dead, deprecated) bufferevent code in 17393 Tor. Closes ticket 19450. Based on a patch from U+039b. 17394 17395 17396Changes in version 0.2.8.7 - 2016-08-24 17397 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses 17398 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone 17399 who sets the ReachableAddresses option, and all bridges, are strongly 17400 encouraged to upgrade. 17401 17402 o Directory authority changes: 17403 - The "Tonga" bridge authority has been retired; the new bridge 17404 authority is "Bifroest". Closes tickets 19728 and 19690. 17405 17406 o Major bugfixes (client, security): 17407 - Only use the ReachableAddresses option to restrict the first hop 17408 in a path. In earlier versions of 0.2.8.x, it would apply to 17409 every hop in the path, with a possible degradation in anonymity 17410 for anyone using an uncommon ReachableAddress setting. Fixes bug 17411 19973; bugfix on 0.2.8.2-alpha. 17412 17413 o Minor features (geoip): 17414 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2 17415 Country database. 17416 17417 o Minor bugfixes (compilation): 17418 - Remove an inappropriate "inline" in tortls.c that was causing 17419 warnings on older versions of GCC. Fixes bug 19903; bugfix 17420 on 0.2.8.1-alpha. 17421 17422 o Minor bugfixes (fallback directories): 17423 - Avoid logging a NULL string pointer when loading fallback 17424 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha 17425 and 0.2.8.1-alpha. Report and patch by "rubiate". 17426 17427 17428Changes in version 0.2.9.1-alpha - 2016-08-08 17429 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development 17430 series. It improves our support for hardened builds and compiler 17431 warnings, deploys some critical infrastructure for improvements to 17432 hidden services, includes a new timing backend that we hope to use for 17433 better support for traffic padding, makes it easier for programmers to 17434 log unexpected events, and contains other small improvements to 17435 security, correctness, and performance. 17436 17437 Below are the changes since 0.2.8.6. 17438 17439 o New system requirements: 17440 - Tor now requires Libevent version 2.0.10-stable or later. Older 17441 versions of Libevent have less efficient backends for several 17442 platforms, and lack the DNS code that we use for our server-side 17443 DNS support. This implements ticket 19554. 17444 - Tor now requires zlib version 1.2 or later, for security, 17445 efficiency, and (eventually) gzip support. (Back when we started, 17446 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was 17447 released in 2003. We recommend the latest version.) 17448 17449 o Major features (build, hardening): 17450 - Tor now builds with -ftrapv by default on compilers that support 17451 it. This option detects signed integer overflow (which C forbids), 17452 and turns it into a hard-failure. We do not apply this option to 17453 code that needs to run in constant time to avoid side-channels; 17454 instead, we use -fwrapv in that code. Closes ticket 17983. 17455 - When --enable-expensive-hardening is selected, stop applying the 17456 clang/gcc sanitizers to code that needs to run in constant time. 17457 Although we are aware of no introduced side-channels, we are not 17458 able to prove that there are none. Related to ticket 17983. 17459 17460 o Major features (compilation): 17461 - Our big list of extra GCC warnings is now enabled by default when 17462 building with GCC (or with anything like Clang that claims to be 17463 GCC-compatible). To make all warnings into fatal compilation 17464 errors, pass --enable-fatal-warnings to configure. Closes 17465 ticket 19044. 17466 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically 17467 turn on C and POSIX extensions. (Previously, we attempted to do 17468 this on an ad hoc basis.) Closes ticket 19139. 17469 17470 o Major features (directory authorities, hidden services): 17471 - Directory authorities can now perform the shared randomness 17472 protocol specified by proposal 250. Using this protocol, directory 17473 authorities generate a global fresh random value every day. In the 17474 future, this value will be used by hidden services to select 17475 HSDirs. This release implements the directory authority feature; 17476 the hidden service side will be implemented in the future as part 17477 of proposal 224. Resolves ticket 16943; implements proposal 250. 17478 17479 o Major features (downloading, random exponential backoff): 17480 - When we fail to download an object from a directory service, wait 17481 for an (exponentially increasing) randomized amount of time before 17482 retrying, rather than a fixed interval as we did before. This 17483 prevents a group of Tor instances from becoming too synchronized, 17484 or a single Tor instance from becoming too predictable, in its 17485 download schedule. Closes ticket 15942. 17486 17487 o Major bugfixes (exit policies): 17488 - Avoid disclosing exit outbound bind addresses, configured port 17489 bind addresses, and local interface addresses in relay descriptors 17490 by default under ExitPolicyRejectPrivate. Instead, only reject 17491 these (otherwise unlisted) addresses if 17492 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on 17493 0.2.7.2-alpha. Patch by teor. 17494 17495 o Major bugfixes (hidden service client): 17496 - Allow Tor clients with appropriate controllers to work with 17497 FetchHidServDescriptors set to 0. Previously, this option also 17498 disabled descriptor cache lookup, thus breaking hidden services 17499 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim". 17500 17501 o Minor features (build, hardening): 17502 - Detect and work around a libclang_rt problem that would prevent 17503 clang from finding __mulodi4() on some 32-bit platforms, and thus 17504 keep -ftrapv from linking on those systems. Closes ticket 19079. 17505 - When building on a system without runtime support for the runtime 17506 hardening options, try to log a useful warning at configuration 17507 time, rather than an incomprehensible warning at link time. If 17508 expensive hardening was requested, this warning becomes an error. 17509 Closes ticket 18895. 17510 17511 o Minor features (code safety): 17512 - In our integer-parsing functions, ensure that maxiumum value we 17513 give is no smaller than the minimum value. Closes ticket 19063; 17514 patch from U+039b. 17515 17516 o Minor features (controller): 17517 - Implement new GETINFO queries for all downloads that use 17518 download_status_t to schedule retries. This allows controllers to 17519 examine the schedule for pending downloads. Closes ticket 19323. 17520 - Allow controllers to configure basic client authorization on 17521 hidden services when they create them with the ADD_ONION control 17522 command. Implements ticket 15588. Patch by "special". 17523 - Fire a STATUS_SERVER controller event whenever the hibernation 17524 status changes between "awake"/"soft"/"hard". Closes ticket 18685. 17525 17526 o Minor features (directory authority): 17527 - Directory authorities now only give the Guard flag to a relay if 17528 they are also giving it the Stable flag. This change allows us to 17529 simplify path selection for clients. It should have minimal effect 17530 in practice, since >99% of Guards already have the Stable flag. 17531 Implements ticket 18624. 17532 - Directory authorities now write their v3-status-votes file out to 17533 disk earlier in the consensus process, so we have a record of the 17534 votes even if we abort the consensus process. Resolves 17535 ticket 19036. 17536 17537 o Minor features (hidden service): 17538 - Stop being so strict about the payload length of "rendezvous1" 17539 cells. We used to be locked in to the "TAP" handshake length, and 17540 now we can handle better handshakes like "ntor". Resolves 17541 ticket 18998. 17542 17543 o Minor features (infrastructure, time): 17544 - Tor now uses the operating system's monotonic timers (where 17545 available) for internal fine-grained timing. Previously we would 17546 look at the system clock, and then attempt to compensate for the 17547 clock running backwards. Closes ticket 18908. 17548 - Tor now includes an improved timer backend, so that we can 17549 efficiently support tens or hundreds of thousands of concurrent 17550 timers, as will be needed for some of our planned anti-traffic- 17551 analysis work. This code is based on William Ahern's "timeout.c" 17552 project, which implements a "tickless hierarchical timing wheel". 17553 Closes ticket 18365. 17554 17555 o Minor features (logging): 17556 - Provide a more useful warning message when configured with an 17557 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount". 17558 - When dumping unparseable router descriptors, optionally store them 17559 in separate files, named by digest, up to a configurable size 17560 limit. You can change the size limit by setting the 17561 MaxUnparseableDescSizeToLog option, and disable this feature by 17562 setting that option to 0. Closes ticket 18322. 17563 - Add a set of macros to check nonfatal assertions, for internal 17564 use. Migrating more of our checks to these should help us avoid 17565 needless crash bugs. Closes ticket 18613. 17566 17567 o Minor features (performance): 17568 - Change the "optimistic data" extension from "off by default" to 17569 "on by default". The default was ordinarily overridden by a 17570 consensus option, but when clients were bootstrapping for the 17571 first time, they would not have a consensus to get the option 17572 from. Changing this default saves a round-trip during startup. 17573 Closes ticket 18815. 17574 17575 o Minor features (relay, usability): 17576 - When the directory authorities refuse a bad relay's descriptor, 17577 encourage the relay operator to contact us. Many relay operators 17578 won't notice this line in their logs, but it's a win if even a few 17579 learn why we don't like what their relay was doing. Resolves 17580 ticket 18760. 17581 17582 o Minor features (testing): 17583 - Let backtrace tests work correctly under AddressSanitizer. Fixes 17584 part of bug 18934; bugfix on 0.2.5.2-alpha. 17585 - Move the test-network.sh script to chutney, and modify tor's test- 17586 network.sh to call the (newer) chutney version when available. 17587 Resolves ticket 19116. Patch by teor. 17588 - Use the lcov convention for marking lines as unreachable, so that 17589 we don't count them when we're generating test coverage data. 17590 Update our coverage tools to understand this convention. Closes 17591 ticket 16792. 17592 17593 o Minor bugfixes (bootstrap): 17594 - Remember the directory we fetched the consensus or previous 17595 certificates from, and use it to fetch future authority 17596 certificates. This change improves bootstrapping performance. 17597 Fixes bug 18963; bugfix on 0.2.8.1-alpha. 17598 17599 o Minor bugfixes (build): 17600 - The test-stem and test-network makefile targets now depend only on 17601 the tor binary that they are testing. Previously, they depended on 17602 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a 17603 patch from "cypherpunks". 17604 17605 o Minor bugfixes (circuits): 17606 - Make sure extend_info_from_router() is only called on servers. 17607 Fixes bug 19639; bugfix on 0.2.8.1-alpha. 17608 17609 o Minor bugfixes (compilation): 17610 - When building with Clang, use a full set of GCC warnings. 17611 (Previously, we included only a subset, because of the way we 17612 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha. 17613 17614 o Minor bugfixes (directory authority): 17615 - Authorities now sort the "package" lines in their votes, for ease 17616 of debugging. (They are already sorted in consensus documents.) 17617 Fixes bug 18840; bugfix on 0.2.6.3-alpha. 17618 - When parsing a detached signature, make sure we use the length of 17619 the digest algorithm instead of an hardcoded DIGEST256_LEN in 17620 order to avoid comparing bytes out-of-bounds with a smaller digest 17621 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha. 17622 17623 o Minor bugfixes (documentation): 17624 - Document the --passphrase-fd option in the tor manpage. Fixes bug 17625 19504; bugfix on 0.2.7.3-rc. 17626 - Fix the description of the --passphrase-fd option in the 17627 tor-gencert manpage. The option is used to pass the number of a 17628 file descriptor to read the passphrase from, not to read the file 17629 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha. 17630 17631 o Minor bugfixes (ephemeral hidden service): 17632 - When deleting an ephemeral hidden service, close its intro points 17633 even if they are not completely open. Fixes bug 18604; bugfix 17634 on 0.2.7.1-alpha. 17635 17636 o Minor bugfixes (guard selection): 17637 - Use a single entry guard even if the NumEntryGuards consensus 17638 parameter is not provided. Fixes bug 17688; bugfix 17639 on 0.2.5.6-alpha. 17640 - Don't mark guards as unreachable if connection_connect() fails. 17641 That function fails for local reasons, so it shouldn't reveal 17642 anything about the status of the guard. Fixes bug 14334; bugfix 17643 on 0.2.3.10-alpha. 17644 17645 o Minor bugfixes (hidden service client): 17646 - Increase the minimum number of internal circuits we preemptively 17647 build from 2 to 3, so a circuit is available when a client 17648 connects to another onion service. Fixes bug 13239; bugfix 17649 on 0.1.0.1-rc. 17650 17651 o Minor bugfixes (logging): 17652 - When logging a directory ownership mismatch, log the owning 17653 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta. 17654 17655 o Minor bugfixes (memory leaks): 17656 - Fix a small, uncommon memory leak that could occur when reading a 17657 truncated ed25519 key file. Fixes bug 18956; bugfix 17658 on 0.2.6.1-alpha. 17659 17660 o Minor bugfixes (testing): 17661 - Allow clients to retry HSDirs much faster in test networks. Fixes 17662 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor. 17663 - Disable ASAN's detection of segmentation faults while running 17664 test_bt.sh, so that we can make sure that our own backtrace 17665 generation code works. Fixes another aspect of bug 18934; bugfix 17666 on 0.2.5.2-alpha. Patch from "cypherpunks". 17667 - Fix the test-network-all target on out-of-tree builds by using the 17668 correct path to the test driver script. Fixes bug 19421; bugfix 17669 on 0.2.7.3-rc. 17670 17671 o Minor bugfixes (time): 17672 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483; 17673 bugfix on all released tor versions. 17674 - When computing the difference between two times in milliseconds, 17675 we now round to the nearest millisecond correctly. Previously, we 17676 could sometimes round in the wrong direction. Fixes bug 19428; 17677 bugfix on 0.2.2.2-alpha. 17678 17679 o Minor bugfixes (user interface): 17680 - Display a more accurate number of suppressed messages in the log 17681 rate-limiter. Previously, there was a potential integer overflow 17682 in the counter. Now, if the number of messages hits a maximum, the 17683 rate-limiter doesn't count any further. Fixes bug 19435; bugfix 17684 on 0.2.4.11-alpha. 17685 - Fix a typo in the passphrase prompt for the ed25519 identity key. 17686 Fixes bug 19503; bugfix on 0.2.7.2-alpha. 17687 17688 o Code simplification and refactoring: 17689 - Remove redundant declarations of the MIN macro. Closes 17690 ticket 18889. 17691 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion. 17692 Closes ticket 18462; patch from "icanhasaccount". 17693 - Split the 600-line directory_handle_command_get function into 17694 separate functions for different URL types. Closes ticket 16698. 17695 17696 o Documentation: 17697 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes 17698 ticket 19153. Patch from "U+039b". 17699 17700 o Removed features: 17701 - Remove support for "GET /tor/bytes.txt" DirPort request, and 17702 "GETINFO dir-usage" controller request, which were only available 17703 via a compile-time option in Tor anyway. Feature was added in 17704 0.2.2.1-alpha. Resolves ticket 19035. 17705 - There is no longer a compile-time option to disable support for 17706 TransPort. (If you don't want TransPort; just don't use it.) Patch 17707 from "U+039b". Closes ticket 19449. 17708 17709 o Testing: 17710 - Run more workqueue tests as part of "make check". These had 17711 previously been implemented, but you needed to know special 17712 command-line options to enable them. 17713 - We now have unit tests for our code to reject zlib "compression 17714 bombs". (Fortunately, the code works fine.) 17715 17716 17717Changes in version 0.2.8.6 - 2016-08-02 17718 17719 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series. 17720 17721 The Tor 0.2.8 series improves client bootstrapping performance, 17722 completes the authority-side implementation of improved identity 17723 keys for relays, and includes numerous bugfixes and performance 17724 improvements throughout the program. This release continues to 17725 improve the coverage of Tor's test suite. For a full list of 17726 changes since Tor 0.2.7, see the ReleaseNotes file. 17727 17728 Changes since 0.2.8.5-rc: 17729 17730 o Minor features (geoip): 17731 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2 17732 Country database. 17733 17734 o Minor bugfixes (compilation): 17735 - Fix a compilation warning in the unit tests on systems where char 17736 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha. 17737 17738 o Minor bugfixes (fallback directories): 17739 - Remove 1 fallback that was on the hardcoded list, then opted-out, 17740 leaving 89 of the 100 fallbacks originally introduced in Tor 17741 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor. 17742 17743 o Minor bugfixes (Linux seccomp2 sandbox): 17744 - Allow more syscalls when running with "Sandbox 1" enabled: 17745 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On 17746 some systems, these are required for Tor to start. Fixes bug 17747 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto. 17748 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1", 17749 so that get_interface_address6_via_udp_socket_hack() can work. 17750 Fixes bug 19660; bugfix on 0.2.5.1-alpha. 17751 17752 17753Changes in version 0.2.8.5-rc - 2016-07-07 17754 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8 17755 series. If we find no new bugs or regressions here, the first stable 17756 0.2.8 release will be identical to it. It has a few small bugfixes 17757 against previous versions. 17758 17759 o Directory authority changes: 17760 - Urras is no longer a directory authority. Closes ticket 19271. 17761 17762 o Major bugfixes (heartbeat): 17763 - Fix a regression that would crash Tor when the periodic 17764 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on 17765 0.2.8.1-alpha. Reported by "kubaku". 17766 17767 o Minor features (build): 17768 - Tor now again builds with the recent OpenSSL 1.1 development 17769 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499. 17770 - When building manual pages, set the timezone to "UTC", so that the 17771 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha. 17772 Patch from intrigeri. 17773 17774 o Minor bugfixes (fallback directory selection): 17775 - Avoid errors during fallback selection if there are no eligible 17776 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch 17777 by teor. 17778 17779 o Minor bugfixes (IPv6, microdescriptors): 17780 - Don't check node addresses when we only have a routerstatus. This 17781 allows IPv6-only clients to bootstrap by fetching microdescriptors 17782 from fallback directory mirrors. (The microdescriptor consensus 17783 has no IPv6 addresses in it.) Fixes bug 19608; bugfix 17784 on 0.2.8.2-alpha. 17785 17786 o Minor bugfixes (logging): 17787 - Reduce pointlessly verbose log messages when directory servers 17788 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and 17789 0.2.8.1-alpha. Patch by teor. 17790 - When a fallback directory changes its fingerprint from the hard- 17791 coded fingerprint, log a less severe, more explanatory log 17792 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor. 17793 17794 o Minor bugfixes (Linux seccomp2 sandboxing): 17795 - Allow statistics to be written to disk when "Sandbox 1" is 17796 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and 17797 0.2.6.1-alpha respectively. 17798 17799 o Minor bugfixes (user interface): 17800 - Remove a warning message "Service [scrubbed] not found after 17801 descriptor upload". This message appears when one uses HSPOST 17802 control command to upload a service descriptor. Since there is 17803 only a descriptor and no service, showing this message is 17804 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha. 17805 17806 o Fallback directory list: 17807 - Add a comment to the generated fallback directory list that 17808 explains how to comment out unsuitable fallbacks in a way that's 17809 compatible with the stem fallback parser. 17810 - Update fallback whitelist and blacklist based on relay operator 17811 emails. Blacklist unsuitable (non-working, over-volatile) 17812 fallbacks. Resolves ticket 19071. Patch by teor. 17813 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks 17814 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes 17815 ticket 19071; patch by teor. 17816 17817 17818Changes in version 0.2.8.4-rc - 2016-06-15 17819 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series. 17820 If we find no new bugs or regressions here, the first stable 0.2.8 17821 release will be identical to it. It has a few small bugfixes against 17822 previous versions. 17823 17824 o Major bugfixes (user interface): 17825 - Correctly give a warning in the cases where a relay is specified 17826 by nickname, and one such relay is found, but it is not officially 17827 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha. 17828 17829 o Minor features (build): 17830 - Tor now builds once again with the recent OpenSSL 1.1 development 17831 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev). 17832 17833 o Minor features (geoip): 17834 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2 17835 Country database. 17836 17837 o Minor bugfixes (compilation): 17838 - Cause the unit tests to compile correctly on mingw64 versions that 17839 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha. 17840 17841 o Minor bugfixes (downloading): 17842 - Predict more correctly whether we'll be downloading over HTTP when 17843 we determine the maximum length of a URL. This should avoid a 17844 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes 17845 bug 19191. 17846 17847 17848Changes in version 0.2.8.3-alpha - 2016-05-26 17849 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over 17850 the course of the 0.2.8 development cycle. It improves the behavior of 17851 directory clients, fixes several crash bugs, fixes a gap in compiler 17852 hardening, and allows the full integration test suite to run on 17853 more platforms. 17854 17855 o Major bugfixes (security, client, DNS proxy): 17856 - Stop a crash that could occur when a client running with DNSPort 17857 received a query with multiple address types, and the first 17858 address type was not supported. Found and fixed by Scott Dial. 17859 Fixes bug 18710; bugfix on 0.2.5.4-alpha. 17860 17861 o Major bugfixes (security, compilation): 17862 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE 17863 is predefined. Previously, our use of -D_FORTIFY_SOURCE would 17864 cause a compiler warning, thereby making other checks fail, and 17865 needlessly disabling compiler-hardening support. Fixes one case of 17866 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal". 17867 17868 o Major bugfixes (security, directory authorities): 17869 - Fix a crash and out-of-bounds write during authority voting, when 17870 the list of relays includes duplicate ed25519 identity keys. Fixes 17871 bug 19032; bugfix on 0.2.8.2-alpha. 17872 17873 o Major bugfixes (client, bootstrapping): 17874 - Check if bootstrap consensus downloads are still needed when the 17875 linked connection attaches. This prevents tor making unnecessary 17876 begindir-style connections, which are the only directory 17877 connections tor clients make since the fix for 18483 was merged. 17878 - Fix some edge cases where consensus download connections may not 17879 have been closed, even though they were not needed. Related to fix 17880 for 18809. 17881 - Make relays retry consensus downloads the correct number of times, 17882 rather than the more aggressive client retry count. Fixes part of 17883 ticket 18809. 17884 - Stop downloading consensuses when we have a consensus, even if we 17885 don't have all the certificates for it yet. Fixes bug 18809; 17886 bugfix on 0.2.8.1-alpha. Patches by arma and teor. 17887 17888 o Major bugfixes (directory mirrors): 17889 - Decide whether to advertise begindir support in the the same way 17890 we decide whether to advertise our DirPort. Allowing these 17891 decisions to become out-of-sync led to surprising behavior like 17892 advertising begindir support when hibernation made us not 17893 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha. 17894 Patch by teor. 17895 17896 o Major bugfixes (IPv6 bridges, client): 17897 - Actually use IPv6 addresses when selecting directory addresses for 17898 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch 17899 by "teor". 17900 17901 o Major bugfixes (key management): 17902 - If OpenSSL fails to generate an RSA key, do not retain a dangling 17903 pointer to the previous (uninitialized) key value. The impact here 17904 should be limited to a difficult-to-trigger crash, if OpenSSL is 17905 running an engine that makes key generation failures possible, or 17906 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on 17907 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and 17908 Baishakhi Ray. 17909 17910 o Major bugfixes (testing): 17911 - Fix a bug that would block 'make test-network-all' on systems where 17912 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc. 17913 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668; 17914 bugfix on 0.2.8.1-alpha. 17915 17916 o Minor features (clients): 17917 - Make clients, onion services, and bridge relays always use an 17918 encrypted begindir connection for directory requests. Resolves 17919 ticket 18483. Patch by "teor". 17920 17921 o Minor features (fallback directory mirrors): 17922 - Give each fallback the same weight for client selection; restrict 17923 fallbacks to one per operator; report fallback directory detail 17924 changes when rebuilding list; add new fallback directory mirrors 17925 to the whitelist; and many other minor simplifications and fixes. 17926 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on 17927 0.2.8.1-alpha; patch by "teor". 17928 - Replace the 21 fallbacks generated in January 2016 and included in 17929 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March 17930 2016. Closes task 17158; patch by "teor". 17931 17932 o Minor features (geoip): 17933 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2 17934 Country database. 17935 17936 o Minor bugfixes (assert, portability): 17937 - Fix an assertion failure in memarea.c on systems where "long" is 17938 shorter than the size of a pointer. Fixes bug 18716; bugfix 17939 on 0.2.1.1-alpha. 17940 17941 o Minor bugfixes (bootstrap): 17942 - Consistently use the consensus download schedule for authority 17943 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha. 17944 17945 o Minor bugfixes (build): 17946 - Remove a pair of redundant AM_CONDITIONAL declarations from 17947 configure.ac. Fixes one final case of bug 17744; bugfix 17948 on 0.2.8.2-alpha. 17949 - Resolve warnings when building on systems that are concerned with 17950 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha 17951 and 0.2.6.1-alpha. 17952 - When libscrypt.h is found, but no libscrypt library can be linked, 17953 treat libscrypt as absent. Fixes bug 19161; bugfix 17954 on 0.2.6.1-alpha. 17955 17956 o Minor bugfixes (client): 17957 - Turn all TestingClientBootstrap* into non-testing torrc options. 17958 This changes simply renames them by removing "Testing" in front of 17959 them and they do not require TestingTorNetwork to be enabled 17960 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha. 17961 - Make directory node selection more reliable, mainly for IPv6-only 17962 clients and clients with few reachable addresses. Fixes bug 18929; 17963 bugfix on 0.2.8.1-alpha. Patch by "teor". 17964 17965 o Minor bugfixes (controller, microdescriptors): 17966 - Make GETINFO dir/status-vote/current/consensus conform to the 17967 control specification by returning "551 Could not open cached 17968 consensus..." when not caching consensuses. Fixes bug 18920; 17969 bugfix on 0.2.2.6-alpha. 17970 17971 o Minor bugfixes (crypto, portability): 17972 - The SHA3 and SHAKE routines now produce the correct output on Big 17973 Endian systems. No code calls either algorithm yet, so this is 17974 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha. 17975 - Tor now builds again with the recent OpenSSL 1.1 development 17976 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes 17977 ticket 18286. 17978 17979 o Minor bugfixes (directories): 17980 - When fetching extrainfo documents, compare their SHA256 digests 17981 and Ed25519 signing key certificates with the routerinfo that led 17982 us to fetch them, rather than with the most recent routerinfo. 17983 Otherwise we generate many spurious warnings about mismatches. 17984 Fixes bug 17150; bugfix on 0.2.7.2-alpha. 17985 17986 o Minor bugfixes (logging): 17987 - When we can't generate a signing key because OfflineMasterKey is 17988 set, do not imply that we should have been able to load it. Fixes 17989 bug 18133; bugfix on 0.2.7.2-alpha. 17990 - Stop periodic_event_dispatch() from blasting twelve lines per 17991 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha. 17992 - When rejecting a misformed INTRODUCE2 cell, only log at 17993 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha. 17994 17995 o Minor bugfixes (pluggable transports): 17996 - Avoid reporting a spurious error when we decide that we don't need 17997 to terminate a pluggable transport because it has already exited. 17998 Fixes bug 18686; bugfix on 0.2.5.5-alpha. 17999 18000 o Minor bugfixes (pointer arithmetic): 18001 - Fix a bug in memarea_alloc() that could have resulted in remote 18002 heap write access, if Tor had ever passed an unchecked size to 18003 memarea_alloc(). Fortunately, all the sizes we pass to 18004 memarea_alloc() are pre-checked to be less than 128 kilobytes. 18005 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by 18006 Guido Vranken. 18007 18008 o Minor bugfixes (relays): 18009 - Consider more config options when relays decide whether to 18010 regenerate their descriptor. Fixes more of bug 12538; bugfix 18011 on 0.2.8.1-alpha. 18012 - Resolve some edge cases where we might launch an ORPort 18013 reachability check even when DisableNetwork is set. Noticed while 18014 fixing bug 18616; bugfix on 0.2.3.9-alpha. 18015 18016 o Minor bugfixes (statistics): 18017 - We now include consensus downloads via IPv6 in our directory- 18018 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha. 18019 18020 o Minor bugfixes (testing): 18021 - Allow directories in small networks to bootstrap by skipping 18022 DirPort checks when the consensus has no exits. Fixes bug 19003; 18023 bugfix on 0.2.8.1-alpha. Patch by teor. 18024 - Fix a small memory leak that would occur when the 18025 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673; 18026 bugfix on 0.2.5.2-alpha. 18027 18028 o Minor bugfixes (time handling): 18029 - When correcting a corrupt 'struct tm' value, fill in the tm_wday 18030 field. Otherwise, our unit tests crash on Windows. Fixes bug 18031 18977; bugfix on 0.2.2.25-alpha. 18032 18033 o Documentation: 18034 - Document the contents of the 'datadir/keys' subdirectory in the 18035 manual page. Closes ticket 17621. 18036 - Stop recommending use of nicknames to identify relays in our 18037 MapAddress documentation. Closes ticket 18312. 18038 18039 18040Changes in version 0.2.8.2-alpha - 2016-03-28 18041 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous 18042 bugs in earlier versions of Tor, including some that prevented 18043 authorities using Tor 0.2.7.x from running correctly. IPv6 and 18044 directory support should also be much improved. 18045 18046 o New system requirements: 18047 - Tor no longer supports versions of OpenSSL with a broken 18048 implementation of counter mode. (This bug was present in OpenSSL 18049 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no 18050 longer runs with, these versions. 18051 - Tor no longer attempts to support platforms where the "time_t" 18052 type is unsigned. (To the best of our knowledge, only OpenVMS does 18053 this, and Tor has never actually built on OpenVMS.) Closes 18054 ticket 18184. 18055 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or 18056 later (released in 2008 and 2009 respectively). If you are 18057 building Tor from the git repository instead of from the source 18058 distribution, and your tools are older than this, you will need to 18059 upgrade. Closes ticket 17732. 18060 18061 o Major bugfixes (security, pointers): 18062 - Avoid a difficult-to-trigger heap corruption attack when extending 18063 a smartlist to contain over 16GB of pointers. Fixes bug 18162; 18064 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely. 18065 Reported by Guido Vranken. 18066 18067 o Major bugfixes (bridges, pluggable transports): 18068 - Modify the check for OR connections to private addresses. Allow 18069 bridges on private addresses, including pluggable transports that 18070 ignore the (potentially private) address in the bridge line. Fixes 18071 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor. 18072 18073 o Major bugfixes (compilation): 18074 - Repair hardened builds under the clang compiler. Previously, our 18075 use of _FORTIFY_SOURCE would conflict with clang's address 18076 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha. 18077 18078 o Major bugfixes (crash on shutdown): 18079 - Correctly handle detaching circuits from muxes when shutting down. 18080 Fixes bug 18116; bugfix on 0.2.8.1-alpha. 18081 - Fix an assert-on-exit bug related to counting memory usage in 18082 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha. 18083 18084 o Major bugfixes (crash on startup): 18085 - Fix a segfault during startup: If a Unix domain socket was 18086 configured as listener (such as a ControlSocket or a SocksPort 18087 "unix:" socket), and tor was started as root but not configured to 18088 switch to another user, tor would segfault while trying to string 18089 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha. 18090 Patch by weasel. 18091 18092 o Major bugfixes (dns proxy mode, crash): 18093 - Avoid crashing when running as a DNS proxy. Fixes bug 16248; 18094 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks". 18095 18096 o Major bugfixes (relays, bridge clients): 18097 - Ensure relays always allow IPv4 OR and Dir connections. Ensure 18098 bridge clients use the address configured in the bridge line. 18099 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb, 18100 patch by teor. 18101 18102 o Major bugfixes (voting): 18103 - Actually enable support for authorities to match routers by their 18104 Ed25519 identities. Previously, the code had been written, but 18105 some debugging code that had accidentally been left in the 18106 codebase made it stay turned off. Fixes bug 17702; bugfix 18107 on 0.2.7.2-alpha. 18108 - When collating votes by Ed25519 identities, authorities now 18109 include a "NoEdConsensus" flag if the ed25519 value (or lack 18110 thereof) for a server does not reflect the majority consensus. 18111 Related to bug 17668; bugfix on 0.2.7.2-alpha. 18112 - When generating a vote with keypinning disabled, never include two 18113 entries for the same ed25519 identity. This bug was causing 18114 authorities to generate votes that they could not parse when a 18115 router violated key pinning by changing its RSA identity but 18116 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug 18117 18318. Bugfix on 0.2.7.2-alpha. 18118 18119 o Minor features (security, win32): 18120 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing 18121 attack. Fixes bug 18123; bugfix on all tor versions. Patch 18122 by teor. 18123 18124 o Minor features (bug-resistance): 18125 - Make Tor survive errors involving connections without a 18126 corresponding event object. Previously we'd fail with an 18127 assertion; now we produce a log message. Related to bug 16248. 18128 18129 o Minor features (build): 18130 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD) 18131 as having possible IPFW support. Closes ticket 18448. Patch from 18132 Steven Chamberlain. 18133 18134 o Minor features (code hardening): 18135 - Use tor_snprintf() and tor_vsnprintf() even in external and low- 18136 level code, to harden against accidental failures to NUL- 18137 terminate. Part of ticket 17852. Patch from jsturgix. Found 18138 with Flawfinder. 18139 18140 o Minor features (crypto): 18141 - Validate the hard-coded Diffie-Hellman parameters and ensure that 18142 p is a safe prime, and g is a suitable generator. Closes 18143 ticket 18221. 18144 18145 o Minor features (geoip): 18146 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2 18147 Country database. 18148 18149 o Minor features (hidden service directory): 18150 - Streamline relay-side hsdir handling: when relays consider whether 18151 to accept an uploaded hidden service descriptor, they no longer 18152 check whether they are one of the relays in the network that is 18153 "supposed" to handle that descriptor. Implements ticket 18332. 18154 18155 o Minor features (IPv6): 18156 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set 18157 to 1, tor prefers IPv6 directory addresses. 18158 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor 18159 avoids using IPv4 for client OR and directory connections. 18160 - Try harder to obey the IP version restrictions "ClientUseIPv4 0", 18161 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and 18162 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor. 18163 18164 o Minor features (linux seccomp2 sandbox): 18165 - Reject attempts to change our Address with "Sandbox 1" enabled. 18166 Changing Address with Sandbox turned on would never actually work, 18167 but previously it would fail in strange and confusing ways. Found 18168 while fixing 18548. 18169 18170 o Minor features (robustness): 18171 - Exit immediately with an error message if the code attempts to use 18172 Libevent without having initialized it. This should resolve some 18173 frequently-made mistakes in our unit tests. Closes ticket 18241. 18174 18175 o Minor features (unix domain sockets): 18176 - Add a new per-socket option, RelaxDirModeCheck, to allow creating 18177 Unix domain sockets without checking the permissions on the parent 18178 directory. (Tor checks permissions by default because some 18179 operating systems only check permissions on the parent directory. 18180 However, some operating systems do look at permissions on the 18181 socket, and tor's default check is unneeded.) Closes ticket 18458. 18182 Patch by weasel. 18183 18184 o Minor bugfixes (exit policies, security): 18185 - Refresh an exit relay's exit policy when interface addresses 18186 change. Previously, tor only refreshed the exit policy when the 18187 configured external address changed. Fixes bug 18208; bugfix on 18188 0.2.7.3-rc. Patch by teor. 18189 18190 o Minor bugfixes (security, hidden services): 18191 - Prevent hidden services connecting to client-supplied rendezvous 18192 addresses that are reserved as internal or multicast. Fixes bug 18193 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor. 18194 18195 o Minor bugfixes (build): 18196 - Do not link the unit tests against both the testing and non- 18197 testing versions of the static libraries. Fixes bug 18490; bugfix 18198 on 0.2.7.1-alpha. 18199 - Avoid spurious failures from configure files related to calling 18200 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on 18201 0.2.0.1-alpha. Patch from "cypherpunks". 18202 - Silence spurious clang-scan warnings in the ed25519_donna code by 18203 explicitly initializing some objects. Fixes bug 18384; bugfix on 18204 0.2.7.2-alpha. Patch by teor. 18205 18206 o Minor bugfixes (client, bootstrap): 18207 - Count receipt of new microdescriptors as progress towards 18208 bootstrapping. Previously, with EntryNodes set, Tor might not 18209 successfully repopulate the guard set on bootstrapping. Fixes bug 18210 16825; bugfix on 0.2.3.1-alpha. 18211 18212 o Minor bugfixes (code correctness): 18213 - Update to the latest version of Trunnel, which tries harder to 18214 avoid generating code that can invoke memcpy(p,NULL,0). Bug found 18215 by clang address sanitizer. Fixes bug 18373; bugfix 18216 on 0.2.7.2-alpha. 18217 18218 o Minor bugfixes (configuration): 18219 - Fix a tiny memory leak when parsing a port configuration ending in 18220 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha. 18221 18222 o Minor bugfixes (containers): 18223 - If we somehow attempt to construct a heap with more than 18224 1073741822 elements, avoid an integer overflow when maintaining 18225 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha. 18226 18227 o Minor bugfixes (correctness): 18228 - Fix a bad memory handling bug that would occur if we had queued a 18229 cell on a channel's incoming queue. Fortunately, we can't actually 18230 queue a cell like that as our code is constructed today, but it's 18231 best to avoid this kind of error, even if there isn't any code 18232 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha. 18233 18234 o Minor bugfixes (directory): 18235 - When generating a URL for a directory server on an IPv6 address, 18236 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix 18237 on 0.2.3.9-alpha. Patch from Malek. 18238 18239 o Minor bugfixes (fallback directory mirrors): 18240 - When requesting extrainfo descriptors from a trusted directory 18241 server, check whether it is an authority or a fallback directory 18242 which supports extrainfo descriptors. Fixes bug 18489; bugfix on 18243 0.2.4.7-alpha. Reported by atagar, patch by teor. 18244 18245 o Minor bugfixes (hidden service, client): 18246 - Handle the case where the user makes several fast consecutive 18247 requests to the same .onion address. Previously, the first six 18248 requests would each trigger a descriptor fetch, each picking a 18249 directory (there are 6 overall) and the seventh one would fail 18250 because no directories were left, thereby triggering a close on 18251 all current directory connections asking for the hidden service. 18252 The solution here is to not close the connections if we have 18253 pending directory fetches. Fixes bug 15937; bugfix 18254 on 0.2.7.1-alpha. 18255 18256 o Minor bugfixes (hidden service, control port): 18257 - Add the onion address to the HS_DESC event for the UPLOADED action 18258 both on success or failure. It was previously hardcoded with 18259 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha. 18260 18261 o Minor bugfixes (hidden service, directory): 18262 - Bridges now refuse "rendezvous2" (hidden service descriptor) 18263 publish attempts. Suggested by ticket 18332. 18264 18265 o Minor bugfixes (linux seccomp2 sandbox): 18266 - Allow the setrlimit syscall, and the prlimit and prlimit64 18267 syscalls, which some libc implementations use under the hood. 18268 Fixes bug 15221; bugfix on 0.2.5.1-alpha. 18269 - Avoid a 10-second delay when starting as a client with "Sandbox 1" 18270 enabled and no DNS resolvers configured. This should help TAILS 18271 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha. 18272 - Fix the sandbox's interoperability with unix domain sockets under 18273 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha. 18274 18275 o Minor bugfixes (logging): 18276 - When logging information about an unparsable networkstatus vote or 18277 consensus, do not say "vote" when we mean consensus. Fixes bug 18278 18368; bugfix on 0.2.0.8-alpha. 18279 - Scrub service name in "unrecognized service ID" log messages. 18280 Fixes bug 18600; bugfix on 0.2.4.11-alpha. 18281 - Downgrade logs and backtraces about IP versions to info-level. 18282 Only log backtraces once each time tor runs. Assists in diagnosing 18283 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and 18284 Christian, patch by teor. 18285 18286 o Minor bugfixes (memory safety): 18287 - Avoid freeing an uninitialized pointer when opening a socket fails 18288 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on 18289 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch 18290 by teor. 18291 - Correctly duplicate addresses in get_interface_address6_list(). 18292 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf, 18293 patch by "cypherpunks". 18294 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix 18295 on 0.2.0.1-alpha. 18296 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug 18297 18672; bugfix on 0.2.5.1-alpha. 18298 18299 o Minor bugfixes (private directory): 18300 - Prevent a race condition when creating private directories. Fixes 18301 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852. 18302 Patch from jsturgix. Found with Flawfinder. 18303 18304 o Minor bugfixes (test networks, IPv6): 18305 - Allow internal IPv6 addresses in descriptors in test networks. 18306 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported 18307 by karsten. 18308 18309 o Minor bugfixes (testing): 18310 - We no longer disable assertions in the unit tests when coverage is 18311 enabled. Instead, we require you to say --disable-asserts-in-tests 18312 to the configure script if you need assertions disabled in the 18313 unit tests (for example, if you want to perform branch coverage). 18314 Fixes bug 18242; bugfix on 0.2.7.1-alpha. 18315 18316 o Minor bugfixes (time parsing): 18317 - Avoid overflow in tor_timegm when parsing dates in and after 2038 18318 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on 18319 0.0.2pre14. Patch by teor. 18320 18321 o Minor bugfixes (tor-gencert): 18322 - Correctly handle the case where an authority operator enters a 18323 passphrase but sends an EOF before sending a newline. Fixes bug 18324 17443; bugfix on 0.2.0.20-rc. Found by junglefowl. 18325 18326 o Code simplification and refactoring: 18327 - Quote all the string interpolations in configure.ac -- even those 18328 which we are pretty sure can't contain spaces. Closes ticket 18329 17744. Patch from zerosion. 18330 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is 18331 inplace, so there's no need to have a separate implementation for 18332 the non-inplace code. Closes ticket 18258. Patch from Malek. 18333 - Simplify return types for some crypto functions that can't 18334 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259. 18335 18336 o Documentation: 18337 - Change build messages to refer to "Fedora" instead of "Fedora 18338 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426. 18339 Patches from "icanhasaccount" and "cypherpunks". 18340 18341 o Removed features: 18342 - We no longer maintain an internal freelist in memarea.c. 18343 Allocators should be good enough to make this code unnecessary, 18344 and it's doubtful that it ever had any performance benefit. 18345 18346 o Testing: 18347 - Fix several warnings from clang's address sanitizer produced in 18348 the unit tests. 18349 - Treat backtrace test failures as expected on FreeBSD until we 18350 solve bug 17808. Closes ticket 18204. 18351 18352 18353Changes in version 0.2.8.1-alpha - 2016-02-04 18354 Tor 0.2.8.1-alpha is the first alpha release in its series. It 18355 includes numerous small features and bugfixes against previous Tor 18356 versions, and numerous small infrastructure improvements. The most 18357 notable features are a set of improvements to the directory subsystem. 18358 18359 o Major features (security, Linux): 18360 - When Tor starts as root on Linux and is told to switch user ID, it 18361 can now retain the capability to bind to low ports. By default, 18362 Tor will do this only when it's switching user ID and some low 18363 ports have been configured. You can change this behavior with the 18364 new option KeepBindCapabilities. Closes ticket 8195. 18365 18366 o Major features (directory system): 18367 - When bootstrapping multiple consensus downloads at a time, use the 18368 first one that starts downloading, and close the rest. This 18369 reduces failures when authorities or fallback directories are slow 18370 or down. Together with the code for feature 15775, this feature 18371 should reduces failures due to fallback churn. Implements ticket 18372 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by 18373 "mikeperry" and "teor". 18374 - Include a trial list of 21 default fallback directories, generated 18375 in January 2016, based on an opt-in survey of suitable relays. 18376 Doing this should make clients bootstrap more quickly and reliably, 18377 and reduce the load on the directory authorities. Closes ticket 18378 15775. Patch by "teor". 18379 Candidates identified using an OnionOO script by "weasel", "teor", 18380 "gsathya", and "karsten". 18381 - Previously only relays that explicitly opened a directory port 18382 (DirPort) accepted directory requests from clients. Now all 18383 relays, with and without a DirPort, accept and serve tunneled 18384 directory requests that they receive through their ORPort. You can 18385 disable this behavior using the new DirCache option. Closes 18386 ticket 12538. 18387 18388 o Major key updates: 18389 - Update the V3 identity key for the dannenberg directory authority: 18390 it was changed on 18 November 2015. Closes task 17906. Patch 18391 by "teor". 18392 18393 o Minor features (security, clock): 18394 - Warn when the system clock appears to move back in time (when the 18395 state file was last written in the future). Tor doesn't know that 18396 consensuses have expired if the clock is in the past. Patch by 18397 "teor". Implements ticket 17188. 18398 18399 o Minor features (security, exit policies): 18400 - ExitPolicyRejectPrivate now rejects more private addresses by 18401 default. Specifically, it now rejects the relay's outbound bind 18402 addresses (if configured), and the relay's configured port 18403 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on 18404 0.2.0.11-alpha. Patch by "teor". 18405 18406 o Minor features (security, memory erasure): 18407 - Set the unused entries in a smartlist to NULL. This helped catch 18408 a (harmless) bug, and shouldn't affect performance too much. 18409 Implements ticket 17026. 18410 - Use SecureMemoryWipe() function to securely clean memory on 18411 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function. 18412 Implements feature 17986. 18413 - Use explicit_bzero or memset_s when present. Previously, we'd use 18414 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches 18415 from <logan@hackers.mu> and <selven@hackers.mu>. 18416 - Make memwipe() do nothing when passed a NULL pointer or buffer of 18417 zero size. Check size argument to memwipe() for underflow. Fixes 18418 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", 18419 patch by "teor". 18420 18421 o Minor features (security, RNG): 18422 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely, 18423 positively are not allowed to fail. Previously we depended on 18424 internal details of OpenSSL's behavior. Closes ticket 17686. 18425 - Never use the system entropy output directly for anything besides 18426 seeding the PRNG. When we want to generate important keys, instead 18427 of using system entropy directly, we now hash it with the PRNG 18428 stream. This may help resist certain attacks based on broken OS 18429 entropy implementations. Closes part of ticket 17694. 18430 - Use modern system calls (like getentropy() or getrandom()) to 18431 generate strong entropy on platforms that have them. Closes 18432 ticket 13696. 18433 18434 o Minor features (accounting): 18435 - Added two modes to the AccountingRule option: One for limiting 18436 only the number of bytes sent ("AccountingRule out"), and one for 18437 limiting only the number of bytes received ("AccountingRule in"). 18438 Closes ticket 15989; patch from "unixninja92". 18439 18440 o Minor features (build): 18441 - Since our build process now uses "make distcheck", we no longer 18442 force "make dist" to depend on "make check". Closes ticket 17893; 18443 patch from "cypherpunks." 18444 - Tor now builds successfully with the recent OpenSSL 1.1 18445 development branch, and with the latest LibreSSL. Closes tickets 18446 17549, 17921, and 17984. 18447 18448 o Minor features (controller): 18449 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes 18450 tickets 16774 and 17817. Patch by George Tankersley. 18451 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden 18452 service descriptor from a service's local hidden service 18453 descriptor cache. Closes ticket 14846. 18454 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so 18455 controllers can examine the the reject rules added by 18456 ExitPolicyRejectPrivate. This makes it easier for stem to display 18457 exit policies. 18458 18459 o Minor features (crypto): 18460 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from 18461 George Tankersley. 18462 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783. 18463 - When allocating a digest state object, allocate no more space than 18464 we actually need. Previously, we would allocate as much space as 18465 the state for the largest algorithm would need. This change saves 18466 up to 672 bytes per circuit. Closes ticket 17796. 18467 - Improve performance when hashing non-multiple of 8 sized buffers, 18468 based on Andrew Moon's public domain SipHash-2-4 implementation. 18469 Fixes bug 17544; bugfix on 0.2.5.3-alpha. 18470 18471 o Minor features (directory downloads): 18472 - Wait for busy authorities and fallback directories to become non- 18473 busy when bootstrapping. (A similar change was made in 6c443e987d 18474 for directory caches chosen from the consensus.) Closes ticket 18475 17864; patch by "teor". 18476 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback 18477 directory mirrors. The default is 1; set it to 0 to disable 18478 fallbacks. Implements ticket 17576. Patch by "teor". 18479 18480 o Minor features (geoip): 18481 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2 18482 Country database. 18483 18484 o Minor features (IPv6): 18485 - Add an argument 'ipv6=address:orport' to the DirAuthority and 18486 FallbackDir torrc options, to specify an IPv6 address for an 18487 authority or fallback directory. Add hard-coded ipv6 addresses for 18488 directory authorities that have them. Closes ticket 17327; patch 18489 from Nick Mathewson and "teor". 18490 - Add address policy assume_action support for IPv6 addresses. 18491 - Limit IPv6 mask bits to 128. 18492 - Warn when comparing against an AF_UNSPEC address in a policy, it's 18493 almost always a bug. Closes ticket 17863; patch by "teor". 18494 - Allow users to configure directory authorities and fallback 18495 directory servers with IPv6 addresses and ORPorts. Resolves 18496 ticket 6027. 18497 - routerset_parse now accepts IPv6 literal addresses. Fixes bug 18498 17060; bugfix on 0.2.1.3-alpha. Patch by "teor". 18499 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug 18500 17638; bugfix on 0.0.2pre8. Patch by "teor". 18501 18502 o Minor features (logging): 18503 - When logging to syslog, allow a tag to be added to the syslog 18504 identity (the string prepended to every log message). The tag can 18505 be configured with SyslogIdentityTag and defaults to none. Setting 18506 it to "foo" will cause logs to be tagged as "Tor-foo". Closes 18507 ticket 17194. 18508 18509 o Minor features (portability): 18510 - Use timingsafe_memcmp() where available. Closes ticket 17944; 18511 patch from <logan@hackers.mu>. 18512 18513 o Minor features (relay, address discovery): 18514 - Add a family argument to get_interface_addresses_raw() and 18515 subfunctions to make network interface address interogation more 18516 efficient. Now Tor can specifically ask for IPv4, IPv6 or both 18517 types of interfaces from the operating system. Resolves 18518 ticket 17950. 18519 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and 18520 fails to enumerate interface addresses using the platform-specific 18521 API, have it rely on the UDP socket fallback technique to try and 18522 find out what IP addresses (both IPv4 and IPv6) our machine has. 18523 Resolves ticket 17951. 18524 18525 o Minor features (replay cache): 18526 - The replay cache now uses SHA256 instead of SHA1. Implements 18527 feature 8961. Patch by "teor", issue reported by "rransom". 18528 18529 o Minor features (unix file permissions): 18530 - Defer creation of Unix sockets until after setuid. This avoids 18531 needing CAP_CHOWN and CAP_FOWNER when using systemd's 18532 CapabilityBoundingSet, or chown and fowner when using SELinux. 18533 Implements part of ticket 17562. Patch from Jamie Nguyen. 18534 - If any directory created by Tor is marked as group readable, the 18535 filesystem group is allowed to be either the default GID or the 18536 root user. Allowing root to read the DataDirectory prevents the 18537 need for CAP_READ_SEARCH when using systemd's 18538 CapabilityBoundingSet, or dac_read_search when using SELinux. 18539 Implements part of ticket 17562. Patch from Jamie Nguyen. 18540 - Introduce a new DataDirectoryGroupReadable option. If it is set to 18541 1, the DataDirectory will be made readable by the default GID. 18542 Implements part of ticket 17562. Patch from Jamie Nguyen. 18543 18544 o Minor bugfixes (accounting): 18545 - The max bandwidth when using 'AccountRule sum' is now correctly 18546 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch 18547 from "unixninja92". 18548 18549 o Minor bugfixes (code correctness): 18550 - When closing an entry connection, generate a warning if we should 18551 have sent an end cell for it but we haven't. Fixes bug 17876; 18552 bugfix on 0.2.3.2-alpha. 18553 - Assert that allocated memory held by the reputation code is freed 18554 according to its internal counters. Fixes bug 17753; bugfix 18555 on 0.1.1.1-alpha. 18556 - Assert when the TLS contexts fail to initialize. Fixes bug 17683; 18557 bugfix on 0.0.6. 18558 18559 o Minor bugfixes (compilation): 18560 - Mark all object files that include micro-revision.i as depending 18561 on it, so as to make parallel builds more reliable. Fixes bug 18562 17826; bugfix on 0.2.5.1-alpha. 18563 - Don't try to use the pthread_condattr_setclock() function unless 18564 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug 18565 17819; bugfix on 0.2.6.3-alpha. 18566 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix 18567 on 0.2.5.2-alpha. 18568 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347; 18569 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'. 18570 - Fix search for libevent libraries on OpenBSD (and other systems 18571 that install libevent 1 and libevent 2 in parallel). Fixes bug 18572 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate". 18573 - Isolate environment variables meant for tests from the rest of the 18574 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc. 18575 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix 18576 on 0.0.2pre8. 18577 - Remove config.log only from make distclean, not from make clean. 18578 Fixes bug 17924; bugfix on 0.2.4.1-alpha. 18579 18580 o Minor bugfixes (crypto): 18581 - Check the return value of HMAC() and assert on failure. Fixes bug 18582 17658; bugfix on 0.2.3.6-alpha. Patch by "teor". 18583 18584 o Minor bugfixes (fallback directories): 18585 - Mark fallbacks as "too busy" when they return a 503 response, 18586 rather than just marking authorities. Fixes bug 17572; bugfix on 18587 0.2.4.7-alpha. Patch by "teor". 18588 18589 o Minor bugfixes (IPv6): 18590 - Update the limits in max_dl_per_request for IPv6 address length. 18591 Fixes bug 17573; bugfix on 0.2.1.5-alpha. 18592 18593 o Minor bugfixes (linux seccomp2 sandbox): 18594 - Fix a crash when using offline master ed25519 keys with the Linux 18595 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc. 18596 18597 o Minor bugfixes (logging): 18598 - In log messages that include a function name, use __FUNCTION__ 18599 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but 18600 with clang __PRETTY_FUNCTION__ has extra information we don't 18601 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van 18602 der Woerdt. 18603 - Remove needless quotes from a log message about unparseable 18604 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha. 18605 18606 o Minor bugfixes (portability): 18607 - Remove an #endif from configure.ac so that we correctly detect the 18608 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix 18609 on 0.2.0.13-alpha. 18610 18611 o Minor bugfixes (relays): 18612 - Check that both the ORPort and DirPort (if present) are reachable 18613 before publishing a relay descriptor. Otherwise, relays publish a 18614 descriptor with DirPort 0 when the DirPort reachability test takes 18615 longer than the ORPort reachability test. Fixes bug 18050; bugfix 18616 on 0.1.0.1-rc. Reported by "starlight", patch by "teor". 18617 18618 o Minor bugfixes (relays, hidden services): 18619 - Refuse connection requests to private OR addresses unless 18620 ExtendAllowPrivateAddresses is set. Previously, tor would connect, 18621 then refuse to send any cells to a private address. Fixes bugs 18622 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor". 18623 18624 o Minor bugfixes (safe logging): 18625 - When logging a malformed hostname received through socks4, scrub 18626 it if SafeLogging says we should. Fixes bug 17419; bugfix 18627 on 0.1.1.16-rc. 18628 18629 o Minor bugfixes (statistics code): 18630 - Consistently check for overflow in round_*_to_next_multiple_of 18631 functions, and add unit tests with additional and maximal values. 18632 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha. 18633 - Handle edge cases in the laplace functions: avoid division by 18634 zero, avoid taking the log of zero, and silence clang type 18635 conversion warnings using round and trunc. Add unit tests for edge 18636 cases with maximal values. Fixes part of bug 13192; bugfix 18637 on 0.2.6.2-alpha. 18638 18639 o Minor bugfixes (testing): 18640 - The test for log_heartbeat was incorrectly failing in timezones 18641 with non-integer offsets. Instead of comparing the end of the time 18642 string against a constant, compare it to the output of 18643 format_local_iso_time when given the correct input. Fixes bug 18644 18039; bugfix on 0.2.5.4-alpha. 18645 - Make unit tests pass on IPv6-only systems, and systems without 18646 localhost addresses (like some FreeBSD jails). Fixes bug 17632; 18647 bugfix on 0.2.7.3-rc. Patch by "teor". 18648 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix 18649 on 0.2.4.8-alpha. 18650 - Check the full results of SHA256 and SHA512 digests in the unit 18651 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor". 18652 18653 o Code simplification and refactoring: 18654 - Move logging of redundant policy entries in 18655 policies_parse_exit_policy_internal into its own function. Closes 18656 ticket 17608; patch from "juce". 18657 - Extract the more complicated parts of circuit_mark_for_close() 18658 into a new function that we run periodically before circuits are 18659 freed. This change removes more than half of the functions 18660 currently in the "blob". Closes ticket 17218. 18661 - Clean up a little duplicated code in 18662 crypto_expand_key_material_TAP(). Closes ticket 17587; patch 18663 from "pfrankw". 18664 - Decouple the list of streams waiting to be attached to circuits 18665 from the overall connection list. This change makes it possible to 18666 attach streams quickly while simplifying Tor's callgraph and 18667 avoiding O(N) scans of the entire connection list. Closes 18668 ticket 17590. 18669 - When a direct directory request fails immediately on launch, 18670 instead of relaunching that request from inside the code that 18671 launches it, instead mark the connection for teardown. This change 18672 simplifies Tor's callback and prevents the directory-request 18673 launching code from invoking itself recursively. Closes 18674 ticket 17589 18675 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't 18676 use them. Closes ticket 17926. 18677 18678 o Documentation: 18679 - Add a description of the correct use of the '--keygen' command- 18680 line option. Closes ticket 17583; based on text by 's7r'. 18681 - Document the minimum HeartbeatPeriod value. Closes ticket 15638. 18682 - Explain actual minima for BandwidthRate. Closes ticket 16382. 18683 - Fix a minor formatting typo in the manpage. Closes ticket 17791. 18684 - Mention torspec URL in the manpage and point the reader to it 18685 whenever we mention a document that belongs in torspce. Fixes 18686 issue 17392. 18687 18688 o Removed features: 18689 - Remove client-side support for connecting to Tor relays running 18690 versions of Tor before 0.2.3.6-alpha. These relays didn't support 18691 the v3 TLS handshake protocol, and are no longer allowed on the 18692 Tor network. Implements the client side of ticket 11150. Based on 18693 patches by Tom van der Woerdt. 18694 18695 o Testing: 18696 - Add unit tests to check for common RNG failure modes, such as 18697 returning all zeroes, identical values, or incrementing values 18698 (OpenSSL's rand_predictable feature). Patch by "teor". 18699 - Log more information when the backtrace tests fail. Closes ticket 18700 17892. Patch from "cypherpunks." 18701 - Always test both ed25519 backends, so that we can be sure that our 18702 batch-open replacement code works. Part of ticket 16794. 18703 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a 18704 portion of ticket 16831. 18705 - More unit tests for compat_libevent.c, procmon.c, tortls.c, 18706 util_format.c, directory.c, and options_validate.c. Closes tickets 18707 17075, 17082, 17084, 17003, and 17076 respectively. Patches from 18708 Ola Bini. 18709 - Unit tests for directory_handle_command_get. Closes ticket 17004. 18710 Patch from Reinaldo de Souza Jr. 18711 18712 18713Changes in version 0.2.7.6 - 2015-12-10 18714 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as 18715 well as a minor bug in hidden service reliability. 18716 18717 o Major bugfixes (guard selection): 18718 - Actually look at the Guard flag when selecting a new directory 18719 guard. When we implemented the directory guard design, we 18720 accidentally started treating all relays as if they have the Guard 18721 flag during guard selection, leading to weaker anonymity and worse 18722 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered 18723 by Mohsen Imani. 18724 18725 o Minor features (geoip): 18726 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2 18727 Country database. 18728 18729 o Minor bugfixes (compilation): 18730 - When checking for net/pfvar.h, include netinet/in.h if possible. 18731 This fixes transparent proxy detection on OpenBSD. Fixes bug 18732 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate". 18733 - Fix a compilation warning with Clang 3.6: Do not check the 18734 presence of an address which can never be NULL. Fixes bug 17781. 18735 18736 o Minor bugfixes (correctness): 18737 - When displaying an IPv6 exit policy, include the mask bits 18738 correctly even when the number is greater than 31. Fixes bug 18739 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner". 18740 - The wrong list was used when looking up expired intro points in a 18741 rend service object, causing what we think could be reachability 18742 issues for hidden services, and triggering a BUG log. Fixes bug 18743 16702; bugfix on 0.2.7.2-alpha. 18744 - Fix undefined behavior in the tor_cert_checksig function. Fixes 18745 bug 17722; bugfix on 0.2.7.2-alpha. 18746 18747 18748Changes in version 0.2.7.5 - 2015-11-20 18749 The Tor 0.2.7 release series is dedicated to the memory of Tor user 18750 and privacy advocate Caspar Bowden (1961-2015). Caspar worked 18751 tirelessly to advocate human rights regardless of national borders, 18752 and oppose the encroachments of mass surveillance. He opposed national 18753 exceptionalism, he brought clarity to legal and policy debates, he 18754 understood and predicted the impact of mass surveillance on the world, 18755 and he laid the groundwork for resisting it. While serving on the Tor 18756 Project's board of directors, he brought us his uncompromising focus 18757 on technical excellence in the service of humankind. Caspar was an 18758 inimitable force for good and a wonderful friend. He was kind, 18759 humorous, generous, gallant, and believed we should protect one 18760 another without exception. We honor him here for his ideals, his 18761 efforts, and his accomplishments. Please honor his memory with works 18762 that would make him proud. 18763 18764 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series. 18765 18766 The 0.2.7 series adds a more secure identity key type for relays, 18767 improves cryptography performance, resolves several longstanding 18768 hidden-service performance issues, improves controller support for 18769 hidden services, and includes small bugfixes and performance 18770 improvements throughout the program. This release series also includes 18771 more tests than before, and significant simplifications to which parts 18772 of Tor invoke which others. 18773 18774 (This release contains no code changes since 0.2.7.4-rc.) 18775 18776 18777Changes in version 0.2.7.4-rc - 2015-10-21 18778 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It 18779 fixes some important memory leaks, and a scary-looking (but mostly 18780 harmless in practice) invalid-read bug. It also has a few small 18781 bugfixes, notably fixes for compilation and portability on different 18782 platforms. If no further significant bounds are found, the next 18783 release will the the official stable release. 18784 18785 o Major bugfixes (security, correctness): 18786 - Fix an error that could cause us to read 4 bytes before the 18787 beginning of an openssl string. This bug could be used to cause 18788 Tor to crash on systems with unusual malloc implementations, or 18789 systems with unusual hardening installed. Fixes bug 17404; bugfix 18790 on 0.2.3.6-alpha. 18791 18792 o Major bugfixes (correctness): 18793 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes 18794 bug 17401; bugfix on 0.2.7.3-rc. 18795 18796 o Major bugfixes (memory leaks): 18797 - Fix a memory leak in ed25519 batch signature checking. Fixes bug 18798 17398; bugfix on 0.2.6.1-alpha. 18799 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug 18800 17402; bugfix on 0.2.7.3-rc. 18801 - Fix a memory leak when reading an expired signing key from disk. 18802 Fixes bug 17403; bugfix on 0.2.7.2-rc. 18803 18804 o Minor features (geoIP): 18805 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2 18806 Country database. 18807 18808 o Minor bugfixes (compilation): 18809 - Repair compilation with the most recent (unreleased, alpha) 18810 vesions of OpenSSL 1.1. Fixes part of ticket 17237. 18811 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug 18812 17251; bugfix on 0.2.7.2-alpha. 18813 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347; 18814 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'. 18815 18816 o Minor bugfixes (portability): 18817 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes 18818 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from 18819 Marcin Cieślak. 18820 18821 o Minor bugfixes (sandbox): 18822 - Add the "hidserv-stats" filename to our sandbox filter for the 18823 HiddenServiceStatistics option to work properly. Fixes bug 17354; 18824 bugfix on 0.2.6.2-alpha. Patch from David Goulet. 18825 18826 o Minor bugfixes (testing): 18827 - Add unit tests for get_interface_address* failure cases. Fixes bug 18828 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor. 18829 - Fix breakage when running 'make check' with BSD make. Fixes bug 18830 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak. 18831 - Make the get_ifaddrs_* unit tests more tolerant of different 18832 network configurations. (Don't assume every test box has an IPv4 18833 address, and don't assume every test box has a non-localhost 18834 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor". 18835 - Skip backtrace tests when backtrace support is not compiled in. 18836 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from 18837 Marcin Cieślak. 18838 18839 o Documentation: 18840 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609. 18841 - Note that HiddenServicePorts can take a unix domain socket. Closes 18842 ticket 17364. 18843 18844 18845Changes in version 0.2.7.3-rc - 2015-09-25 18846 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It 18847 contains numerous usability fixes for Ed25519 keys, safeguards against 18848 several misconfiguration problems, significant simplifications to 18849 Tor's callgraph, and numerous bugfixes and small features. 18850 18851 This is the most tested release of Tor to date. The unit tests cover 18852 39.40% of the code, and the integration tests (accessible with "make 18853 test-full-online", requiring stem and chutney and a network 18854 connection) raise the coverage to 64.49%. 18855 18856 o Major features (security, hidden services): 18857 - Hidden services, if using the EntryNodes option, are required to 18858 use more than one EntryNode, in order to avoid a guard discovery 18859 attack. (This would only affect people who had configured hidden 18860 services and manually specified the EntryNodes option with a 18861 single entry-node. The impact was that it would be easy to 18862 remotely identify the guard node used by such a hidden service. 18863 See ticket for more information.) Fixes ticket 14917. 18864 18865 o Major features (Ed25519 keys, keypinning): 18866 - The key-pinning option on directory authorities is now advisory- 18867 only by default. In a future version, or when the AuthDirPinKeys 18868 option is set, pins are enforced again. Disabling key-pinning 18869 seemed like a good idea so that we can survive the fallout of any 18870 usability problems associated with Ed25519 keys. Closes 18871 ticket 17135. 18872 18873 o Major features (Ed25519 performance): 18874 - Improve the speed of Ed25519 operations and Curve25519 keypair 18875 generation when built targeting 32 bit x86 platforms with SSE2 18876 available. Implements ticket 16535. 18877 - Improve the runtime speed of Ed25519 signature verification by 18878 using Ed25519-donna's batch verification support. Implements 18879 ticket 16533. 18880 18881 o Major features (performance testing): 18882 - The test-network.sh script now supports performance testing. 18883 Requires corresponding chutney performance testing changes. Patch 18884 by "teor". Closes ticket 14175. 18885 18886 o Major features (relay, Ed25519): 18887 - Significant usability improvements for Ed25519 key management. Log 18888 messages are better, and the code can recover from far more 18889 failure conditions. Thanks to "s7r" for reporting and diagnosing 18890 so many of these! 18891 - Add a new OfflineMasterKey option to tell Tor never to try loading 18892 or generating a secret Ed25519 identity key. You can use this in 18893 combination with tor --keygen to manage offline and/or encrypted 18894 Ed25519 keys. Implements ticket 16944. 18895 - Add a --newpass option to allow changing or removing the 18896 passphrase of an encrypted key with tor --keygen. Implements part 18897 of ticket 16769. 18898 - On receiving a HUP signal, check to see whether the Ed25519 18899 signing key has changed, and reload it if so. Closes ticket 16790. 18900 18901 o Major bugfixes (relay, Ed25519): 18902 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on 18903 0.2.7.2-alpha. Reported by "s7r". 18904 - Improve handling of expired signing keys with offline master keys. 18905 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r". 18906 18907 o Minor features (client-side privacy): 18908 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit 18909 lifespan when IsolateSOCKSAuth and streams with SOCKS 18910 authentication are attached to the circuit. This allows 18911 applications like TorBrowser to manage circuit lifetime on their 18912 own. Implements feature 15482. 18913 - When logging malformed hostnames from SOCKS5 requests, respect 18914 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc. 18915 18916 o Minor features (compilation): 18917 - Give a warning as early as possible when trying to build with an 18918 unsupported OpenSSL version. Closes ticket 16901. 18919 - Fail during configure if we're trying to build against an OpenSSL 18920 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha 18921 which started requiring ECC. 18922 18923 o Minor features (geoip): 18924 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2 18925 Country database. 18926 18927 o Minor features (hidden services): 18928 - Relays need to have the Fast flag to get the HSDir flag. As this 18929 is being written, we'll go from 2745 HSDirs down to 2342, a ~14% 18930 drop. This change should make some attacks against the hidden 18931 service directory system harder. Fixes ticket 15963. 18932 - Turn on hidden service statistics collection by setting the torrc 18933 option HiddenServiceStatistics to "1" by default. (This keeps 18934 track only of the fraction of traffic used by hidden services, and 18935 the total number of hidden services in existence.) Closes 18936 ticket 15254. 18937 - Client now uses an introduction point failure cache to know when 18938 to fetch or keep a descriptor in their cache. Previously, failures 18939 were recorded implicitly, but not explicitly remembered. Closes 18940 ticket 16389. 18941 18942 o Minor features (testing, authorities, documentation): 18943 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to 18944 explicitly manage consensus flags in testing networks. Patch by 18945 "robgjansen", modified by "teor". Implements part of ticket 14882. 18946 18947 o Minor bugfixes (security, exit policies): 18948 - ExitPolicyRejectPrivate now also rejects the relay's published 18949 IPv6 address (if any), and any publicly routable IPv4 or IPv6 18950 addresses on any local interfaces. ticket 17027. Patch by "teor". 18951 Fixes bug 17027; bugfix on 0.2.0.11-alpha. 18952 18953 o Minor bug fixes (torrc exit policies): 18954 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only 18955 produce IPv6 wildcard addresses. Previously they would produce 18956 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part 18957 of bug 16069; bugfix on 0.2.4.7-alpha. 18958 - When parsing torrc ExitPolicies, we now warn for a number of cases 18959 where the user's intent is likely to differ from Tor's actual 18960 behavior. These include: using an IPv4 address with an accept6 or 18961 reject6 line; using "private" on an accept6 or reject6 line; and 18962 including any ExitPolicy lines after accept *:* or reject *:*. 18963 Related to ticket 16069. 18964 - When parsing torrc ExitPolicies, we now issue an info-level 18965 message when expanding an "accept/reject *" line to include both 18966 IPv4 and IPv6 wildcard addresses. Related to ticket 16069. 18967 - In each instance above, usage advice is provided to avoid the 18968 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug 18969 16069; bugfix on 0.2.4.7-alpha. 18970 18971 o Minor bugfixes (authority): 18972 - Don't assign "HSDir" to a router if it isn't Valid and Running. 18973 Fixes bug 16524; bugfix on 0.2.7.2-alpha. 18974 - Downgrade log messages about Ed25519 key issues if they are in old 18975 cached router descriptors. Fixes part of bug 16286; bugfix 18976 on 0.2.7.2-alpha. 18977 - When we find an Ed25519 key issue in a cached descriptor, stop 18978 saying the descriptor was just "uploaded". Fixes another part of 18979 bug 16286; bugfix on 0.2.7.2-alpha. 18980 18981 o Minor bugfixes (control port): 18982 - Repair a warning and a spurious result when getting the maximum 18983 number of file descriptors from the controller. Fixes bug 16697; 18984 bugfix on 0.2.7.2-alpha. 18985 18986 o Minor bugfixes (correctness): 18987 - When calling channel_free_list(), avoid calling smartlist_remove() 18988 while inside a FOREACH loop. This partially reverts commit 18989 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was 18990 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha. 18991 18992 o Minor bugfixes (documentation): 18993 - Advise users on how to configure separate IPv4 and IPv6 exit 18994 policies in the manpage and sample torrcs. Related to ticket 16069. 18995 - Fix the usage message of tor-resolve(1) so that it no longer lists 18996 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta. 18997 - Fix an error in the manual page and comments for 18998 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir 18999 required "ORPort connectivity". While this is true, it is in no 19000 way unique to the HSDir flag. Of all the flags, only HSDirs need a 19001 DirPort configured in order for the authorities to assign that 19002 particular flag. Patch by "teor". Fixed as part of 14882; bugfix 19003 on 0.2.6.3-alpha. 19004 19005 o Minor bugfixes (Ed25519): 19006 - Fix a memory leak when reading router descriptors with expired 19007 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha. 19008 19009 o Minor bugfixes (linux seccomp2 sandbox): 19010 - Allow bridge authorities to run correctly under the seccomp2 19011 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha. 19012 - Allow routers with ed25519 keys to run correctly under the 19013 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha. 19014 19015 o Minor bugfixes (open file limit): 19016 - Fix set_max_file_descriptors() to set by default the max open file 19017 limit to the current limit when setrlimit() fails. Fixes bug 19018 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet. 19019 19020 o Minor bugfixes (portability): 19021 - Try harder to normalize the exit status of the Tor process to the 19022 standard-provided range. Fixes bug 16975; bugfix on every version 19023 of Tor ever. 19024 - Check correctly for Windows socket errors in the workqueue 19025 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha. 19026 - Fix the behavior of crypto_rand_time_range() when told to consider 19027 times before 1970. (These times were possible when running in a 19028 simulated network environment where time()'s output starts at 19029 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha. 19030 - Restore correct operation of TLS client-cipher detection on 19031 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha. 19032 19033 o Minor bugfixes (relay): 19034 - Ensure that worker threads actually exit when a fatal error or 19035 shutdown is indicated. This fix doesn't currently affect the 19036 behavior of Tor, because Tor workers never indicates fatal error 19037 or shutdown except in the unit tests. Fixes bug 16868; bugfix 19038 on 0.2.6.3-alpha. 19039 - Unblock threads before releasing the work queue mutex to ensure 19040 predictable scheduling behavior. Fixes bug 16644; bugfix 19041 on 0.2.6.3-alpha. 19042 19043 o Code simplification and refactoring: 19044 - Change the function that's called when we need to retry all 19045 downloads so that it only reschedules the downloads to happen 19046 immediately, rather than launching them all at once itself. This 19047 further simplifies Tor's callgraph. 19048 - Move some format-parsing functions out of crypto.c and 19049 crypto_curve25519.c into crypto_format.c and/or util_format.c. 19050 - Move the client-only parts of init_keys() into a separate 19051 function. Closes ticket 16763. 19052 - Simplify the microdesc_free() implementation so that it no longer 19053 appears (to code analysis tools) to potentially invoke a huge 19054 suite of other microdesc functions. 19055 - Simply the control graph further by deferring the inner body of 19056 directory_all_unreachable() into a callback. Closes ticket 16762. 19057 - Treat the loss of an owning controller as equivalent to a SIGTERM 19058 signal. This removes a tiny amount of duplicated code, and 19059 simplifies our callgraph. Closes ticket 16788. 19060 - When generating an event to send to the controller, we no longer 19061 put the event over the network immediately. Instead, we queue 19062 these events, and use a Libevent callback to deliver them. This 19063 change simplifies Tor's callgraph by reducing the number of 19064 functions from which all other Tor functions are reachable. Closes 19065 ticket 16695. 19066 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools 19067 that try to scan or compile every file on Unix won't decide that 19068 they are broken. 19069 - Remove the unused "nulterminate" argument from buf_pullup(). 19070 19071 o Documentation: 19072 - Recommend a 40 GB example AccountingMax in torrc.sample rather 19073 than a 4 GB max. Closes ticket 16742. 19074 - Include the TUNING document in our source tarball. It is referred 19075 to in the ChangeLog and an error message. Fixes bug 16929; bugfix 19076 on 0.2.6.1-alpha. 19077 19078 o Removed code: 19079 - The internal pure-C tor-fw-helper tool is now removed from the Tor 19080 distribution, in favor of the pure-Go clone available from 19081 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries 19082 used by the C tor-fw-helper are not, in our opinion, very 19083 confidence- inspiring in their secure-programming techniques. 19084 Closes ticket 13338. 19085 - Remove the code that would try to aggressively flush controller 19086 connections while writing to them. This code was introduced in 19087 0.1.2.7-alpha, in order to keep output buffers from exceeding 19088 their limits. But there is no longer a maximum output buffer size, 19089 and flushing data in this way caused some undesirable recursions 19090 in our call graph. Closes ticket 16480. 19091 19092 o Testing: 19093 - Make "bridges+hs" the default test network. This tests almost all 19094 tor functionality during make test-network, while allowing tests 19095 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in 19096 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946 19097 (chutney). Patches by "teor". 19098 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side- 19099 by-side in the same parent directory. Closes ticket 16903. Patch 19100 by "teor". 19101 - Use environment variables rather than autoconf substitutions to 19102 send variables from the build system to the test scripts. This 19103 change should be easier to maintain, and cause 'make distcheck' to 19104 work better than before. Fixes bug 17148. 19105 - Add a new set of callgraph analysis scripts that use clang to 19106 produce a list of which Tor functions are reachable from which 19107 other Tor functions. We're planning to use these to help simplify 19108 our code structure by identifying illogical dependencies. 19109 - Add new 'test-full' and 'test-full-online' targets to run all 19110 tests, including integration tests with stem and chutney. 19111 - Make the test-workqueue test work on Windows by initializing the 19112 network before we begin. 19113 - New make target (make test-network-all) to run multiple applicable 19114 chutney test cases. Patch from Teor; closes 16953. 19115 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl() 19116 functions in dns.c. Implements a portion of ticket 16831. 19117 - When building Tor with testing coverage enabled, run Chutney tests 19118 (if any) using the 'tor-cov' coverage binary. 19119 - When running test-network or test-stem, check for the absence of 19120 stem/chutney before doing any build operations. 19121 19122 19123Changes in version 0.2.7.2-alpha - 2015-07-27 19124 This, the second alpha in the Tor 0.2.7 series, has a number of new 19125 features, including a way to manually pick the number of introduction 19126 points for hidden services, and the much stronger Ed25519 signing key 19127 algorithm for regular Tor relays (including support for encrypted 19128 offline identity keys in the new algorithm). 19129 19130 Support for Ed25519 on relays is currently limited to signing router 19131 descriptors; later alphas in this series will extend Ed25519 key 19132 support to more parts of the Tor protocol. 19133 19134 o Major features (Ed25519 identity keys, Proposal 220): 19135 - All relays now maintain a stronger identity key, using the Ed25519 19136 elliptic curve signature format. This master key is designed so 19137 that it can be kept offline. Relays also generate an online 19138 signing key, and a set of other Ed25519 keys and certificates. 19139 These are all automatically regenerated and rotated as needed. 19140 Implements part of ticket 12498. 19141 - Directory authorities now vote on Ed25519 identity keys along with 19142 RSA1024 keys. Implements part of ticket 12498. 19143 - Directory authorities track which Ed25519 identity keys have been 19144 used with which RSA1024 identity keys, and do not allow them to 19145 vary freely. Implements part of ticket 12498. 19146 - Microdescriptors now include Ed25519 identity keys. Implements 19147 part of ticket 12498. 19148 - Add support for offline encrypted Ed25519 master keys. To use this 19149 feature on your tor relay, run "tor --keygen" to make a new master 19150 key (or to make a new signing key if you already have a master 19151 key). Closes ticket 13642. 19152 19153 o Major features (Hidden services): 19154 - Add the torrc option HiddenServiceNumIntroductionPoints, to 19155 specify a fixed number of introduction points. Its maximum value 19156 is 10 and default is 3. Using this option can increase a hidden 19157 service's reliability under load, at the cost of making it more 19158 visible that the hidden service is facing extra load. Closes 19159 ticket 4862. 19160 - Remove the adaptive algorithm for choosing the number of 19161 introduction points, which used to change the number of 19162 introduction points (poorly) depending on the number of 19163 connections the HS sees. Closes ticket 4862. 19164 19165 o Major features (onion key cross-certification): 19166 - Relay descriptors now include signatures of their own identity 19167 keys, made using the TAP and ntor onion keys. These signatures 19168 allow relays to prove ownership of their own onion keys. Because 19169 of this change, microdescriptors will no longer need to include 19170 RSA identity keys. Implements proposal 228; closes ticket 12499. 19171 19172 o Major features (performance): 19173 - Improve the runtime speed of Ed25519 operations by using the 19174 public-domain Ed25519-donna by Andrew M. ("floodyberry"). 19175 Implements ticket 16467. 19176 - Improve the runtime speed of the ntor handshake by using an 19177 optimized curve25519 basepoint scalarmult implementation from the 19178 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on 19179 ideas by Adam Langley. Implements ticket 9663. 19180 19181 o Major bugfixes (client-side privacy, also in 0.2.6.9): 19182 - Properly separate out each SOCKSPort when applying stream 19183 isolation. The error occurred because each port's session group 19184 was being overwritten by a default value when the listener 19185 connection was initialized. Fixes bug 16247; bugfix on 19186 0.2.6.3-alpha. Patch by "jojelino". 19187 19188 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10): 19189 - Stop refusing to store updated hidden service descriptors on a 19190 client. This reverts commit 9407040c59218 (which indeed fixed bug 19191 14219, but introduced a major hidden service reachability 19192 regression detailed in bug 16381). This is a temporary fix since 19193 we can live with the minor issue in bug 14219 (it just results in 19194 some load on the network) but the regression of 16381 is too much 19195 of a setback. First-round fix for bug 16381; bugfix 19196 on 0.2.6.3-alpha. 19197 19198 o Major bugfixes (hidden services): 19199 - When cannibalizing a circuit for an introduction point, always 19200 extend to the chosen exit node (creating a 4 hop circuit). 19201 Previously Tor would use the current circuit exit node, which 19202 changed the original choice of introduction point, and could cause 19203 the hidden service to skip excluded introduction points or 19204 reconnect to a skipped introduction point. Fixes bug 16260; bugfix 19205 on 0.1.0.1-rc. 19206 19207 o Major bugfixes (open file limit): 19208 - The open file limit wasn't checked before calling 19209 tor_accept_socket_nonblocking(), which would make Tor exceed the 19210 limit. Now, before opening a new socket, Tor validates the open 19211 file limit just before, and if the max has been reached, return an 19212 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha. 19213 19214 o Major bugfixes (stability, also in 0.2.6.10): 19215 - Stop crashing with an assertion failure when parsing certain kinds 19216 of malformed or truncated microdescriptors. Fixes bug 16400; 19217 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch 19218 by "cypherpunks_backup". 19219 - Stop random client-side assertion failures that could occur when 19220 connecting to a busy hidden service, or connecting to a hidden 19221 service while a NEWNYM is in progress. Fixes bug 16013; bugfix 19222 on 0.1.0.1-rc. 19223 19224 o Minor features (directory authorities, security, also in 0.2.6.9): 19225 - The HSDir flag given by authorities now requires the Stable flag. 19226 For the current network, this results in going from 2887 to 2806 19227 HSDirs. Also, it makes it harder for an attacker to launch a sybil 19228 attack by raising the effort for a relay to become Stable to 19229 require at the very least 7 days, while maintaining the 96 hours 19230 uptime requirement for HSDir. Implements ticket 8243. 19231 19232 o Minor features (client): 19233 - Relax the validation of hostnames in SOCKS5 requests, allowing the 19234 character '_' to appear, in order to cope with domains observed in 19235 the wild that are serving non-RFC compliant records. Resolves 19236 ticket 16430. 19237 - Relax the validation done to hostnames in SOCKS5 requests, and 19238 allow a single trailing '.' to cope with clients that pass FQDNs 19239 using that syntax to explicitly indicate that the domain name is 19240 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha. 19241 - Add GroupWritable and WorldWritable options to unix-socket based 19242 SocksPort and ControlPort options. These options apply to a single 19243 socket, and override {Control,Socks}SocketsGroupWritable. Closes 19244 ticket 15220. 19245 19246 o Minor features (control protocol): 19247 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in 19248 the control protocol. Resolves ticket 15358. 19249 19250 o Minor features (directory authorities): 19251 - Directory authorities no longer vote against the "Fast", "Stable", 19252 and "HSDir" flags just because they were going to vote against 19253 "Running": if the consensus turns out to be that the router was 19254 running, then the authority's vote should count. Patch from Peter 19255 Retzlaff; closes issue 8712. 19256 19257 o Minor features (geoip, also in 0.2.6.10): 19258 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database. 19259 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database. 19260 19261 o Minor features (hidden services): 19262 - Add the new options "HiddenServiceMaxStreams" and 19263 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to 19264 limit the maximum number of simultaneous streams per circuit, and 19265 optionally tear down the circuit when the limit is exceeded. Part 19266 of ticket 16052. 19267 19268 o Minor features (portability): 19269 - Use C99 variadic macros when the compiler is not GCC. This avoids 19270 failing compilations on MSVC, and fixes a log-file-based race 19271 condition in our old workarounds. Original patch from Gisle Vanem. 19272 19273 o Minor bugfixes (compilation, also in 0.2.6.9): 19274 - Build with --enable-systemd correctly when libsystemd is 19275 installed, but systemd is not. Fixes bug 16164; bugfix on 19276 0.2.6.3-alpha. Patch from Peter Palfrader. 19277 19278 o Minor bugfixes (controller): 19279 - Add the descriptor ID in each HS_DESC control event. It was 19280 missing, but specified in control-spec.txt. Fixes bug 15881; 19281 bugfix on 0.2.5.2-alpha. 19282 19283 o Minor bugfixes (crypto error-handling, also in 0.2.6.10): 19284 - Check for failures from crypto_early_init, and refuse to continue. 19285 A previous typo meant that we could keep going with an 19286 uninitialized crypto library, and would have OpenSSL initialize 19287 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced 19288 when implementing ticket 4900. Patch by "teor". 19289 19290 o Minor bugfixes (hidden services): 19291 - Fix a crash when reloading configuration while at least one 19292 configured and one ephemeral hidden service exists. Fixes bug 19293 16060; bugfix on 0.2.7.1-alpha. 19294 - Avoid crashing with a double-free bug when we create an ephemeral 19295 hidden service but adding it fails for some reason. Fixes bug 19296 16228; bugfix on 0.2.7.1-alpha. 19297 19298 o Minor bugfixes (Linux seccomp2 sandbox): 19299 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is 19300 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha. 19301 19302 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10): 19303 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need 19304 these when eventfd2() support is missing. Fixes bug 16363; bugfix 19305 on 0.2.6.3-alpha. Patch from "teor". 19306 19307 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9): 19308 - Fix sandboxing to work when running as a relay, by allowing the 19309 renaming of secret_id_key, and allowing the eventfd2 and futex 19310 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by 19311 Peter Palfrader. 19312 - Allow systemd connections to work with the Linux seccomp2 sandbox 19313 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by 19314 Peter Palfrader. 19315 19316 o Minor bugfixes (relay): 19317 - Fix a rarely-encountered memory leak when failing to initialize 19318 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch 19319 from "cypherpunks". 19320 19321 o Minor bugfixes (systemd): 19322 - Fix an accidental formatting error that broke the systemd 19323 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha. 19324 - Tor's systemd unit file no longer contains extraneous spaces. 19325 These spaces would sometimes confuse tools like deb-systemd- 19326 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha. 19327 19328 o Minor bugfixes (tests): 19329 - Use the configured Python executable when running test-stem-full. 19330 Fixes bug 16470; bugfix on 0.2.7.1-alpha. 19331 19332 o Minor bugfixes (tests, also in 0.2.6.9): 19333 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug 19334 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker". 19335 19336 o Minor bugfixes (threads, comments): 19337 - Always initialize return value in compute_desc_id in rendcommon.c 19338 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha. 19339 - Check for NULL values in getinfo_helper_onions(). Patch by "teor". 19340 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha. 19341 - Remove undefined directive-in-macro in test_util_writepid clang 19342 3.7 complains that using a preprocessor directive inside a macro 19343 invocation in test_util_writepid in test_util.c is undefined. 19344 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha. 19345 19346 o Code simplification and refactoring: 19347 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order 19348 to ensure they remain consistent and visible everywhere. 19349 - Remove some vestigial workarounds for the MSVC6 compiler. We 19350 haven't supported that in ages. 19351 - The link authentication code has been refactored for better 19352 testability and reliability. It now uses code generated with the 19353 "trunnel" binary encoding generator, to reduce the risk of bugs 19354 due to programmer error. Done as part of ticket 12498. 19355 19356 o Documentation: 19357 - Include a specific and (hopefully) accurate documentation of the 19358 torrc file's meta-format in doc/torrc_format.txt. This is mainly 19359 of interest to people writing programs to parse or generate torrc 19360 files. This document is not a commitment to long-term 19361 compatibility; some aspects of the current format are a bit 19362 ridiculous. Closes ticket 2325. 19363 19364 o Removed features: 19365 - Tor no longer supports copies of OpenSSL that are missing support 19366 for Elliptic Curve Cryptography. (We began using ECC when 19367 available in 0.2.4.8-alpha, for more safe and efficient key 19368 negotiation.) In particular, support for at least one of P256 or 19369 P224 is now required, with manual configuration needed if only 19370 P224 is available. Resolves ticket 16140. 19371 - Tor no longer supports versions of OpenSSL before 1.0. (If you are 19372 on an operating system that has not upgraded to OpenSSL 1.0 or 19373 later, and you compile Tor from source, you will need to install a 19374 more recent OpenSSL to link Tor against.) These versions of 19375 OpenSSL are still supported by the OpenSSL, but the numerous 19376 cryptographic improvements in later OpenSSL releases makes them a 19377 clear choice. Resolves ticket 16034. 19378 - Remove the HidServDirectoryV2 option. Now all relays offer to 19379 store hidden service descriptors. Related to 16543. 19380 - Remove the VoteOnHidServDirectoriesV2 option, since all 19381 authorities have long set it to 1. Closes ticket 16543. 19382 19383 o Testing: 19384 - Document use of coverity, clang static analyzer, and clang dynamic 19385 undefined behavior and address sanitizers in doc/HACKING. Include 19386 detailed usage instructions in the blacklist. Patch by "teor". 19387 Closes ticket 15817. 19388 - The link authentication protocol code now has extensive tests. 19389 - The relay descriptor signature testing code now has 19390 extensive tests. 19391 - The test_workqueue program now runs faster, and is enabled by 19392 default as a part of "make check". 19393 - Now that OpenSSL has its own scrypt implementation, add an unit 19394 test that checks for interoperability between libscrypt_scrypt() 19395 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt 19396 and rely on EVP_PBE_scrypt() whenever possible. Resolves 19397 ticket 16189. 19398 19399 19400Changes in version 0.2.6.10 - 2015-07-12 19401 Tor version 0.2.6.10 fixes some significant stability and hidden 19402 service client bugs, bulletproofs the cryptography init process, and 19403 fixes a bug when using the sandbox code with some older versions of 19404 Linux. Everyone running an older version, especially an older version 19405 of 0.2.6, should upgrade. 19406 19407 o Major bugfixes (hidden service clients, stability): 19408 - Stop refusing to store updated hidden service descriptors on a 19409 client. This reverts commit 9407040c59218 (which indeed fixed bug 19410 14219, but introduced a major hidden service reachability 19411 regression detailed in bug 16381). This is a temporary fix since 19412 we can live with the minor issue in bug 14219 (it just results in 19413 some load on the network) but the regression of 16381 is too much 19414 of a setback. First-round fix for bug 16381; bugfix 19415 on 0.2.6.3-alpha. 19416 19417 o Major bugfixes (stability): 19418 - Stop crashing with an assertion failure when parsing certain kinds 19419 of malformed or truncated microdescriptors. Fixes bug 16400; 19420 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch 19421 by "cypherpunks_backup". 19422 - Stop random client-side assertion failures that could occur when 19423 connecting to a busy hidden service, or connecting to a hidden 19424 service while a NEWNYM is in progress. Fixes bug 16013; bugfix 19425 on 0.1.0.1-rc. 19426 19427 o Minor features (geoip): 19428 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database. 19429 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database. 19430 19431 o Minor bugfixes (crypto error-handling): 19432 - Check for failures from crypto_early_init, and refuse to continue. 19433 A previous typo meant that we could keep going with an 19434 uninitialized crypto library, and would have OpenSSL initialize 19435 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced 19436 when implementing ticket 4900. Patch by "teor". 19437 19438 o Minor bugfixes (Linux seccomp2 sandbox): 19439 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need 19440 these when eventfd2() support is missing. Fixes bug 16363; bugfix 19441 on 0.2.6.3-alpha. Patch from "teor". 19442 19443 19444Changes in version 0.2.6.9 - 2015-06-11 19445 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the 19446 requirements for receiving an HSDir flag, and addresses some other small 19447 bugs in the systemd and sandbox code. Clients using circuit isolation 19448 should upgrade; all directory authorities should upgrade. 19449 19450 o Major bugfixes (client-side privacy): 19451 - Properly separate out each SOCKSPort when applying stream 19452 isolation. The error occurred because each port's session group was 19453 being overwritten by a default value when the listener connection 19454 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch 19455 by "jojelino". 19456 19457 o Minor feature (directory authorities, security): 19458 - The HSDir flag given by authorities now requires the Stable flag. 19459 For the current network, this results in going from 2887 to 2806 19460 HSDirs. Also, it makes it harder for an attacker to launch a sybil 19461 attack by raising the effort for a relay to become Stable which 19462 takes at the very least 7 days to do so and by keeping the 96 19463 hours uptime requirement for HSDir. Implements ticket 8243. 19464 19465 o Minor bugfixes (compilation): 19466 - Build with --enable-systemd correctly when libsystemd is 19467 installed, but systemd is not. Fixes bug 16164; bugfix on 19468 0.2.6.3-alpha. Patch from Peter Palfrader. 19469 19470 o Minor bugfixes (Linux seccomp2 sandbox): 19471 - Fix sandboxing to work when running as a relaymby renaming of 19472 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes 19473 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader. 19474 - Allow systemd connections to work with the Linux seccomp2 sandbox 19475 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by 19476 Peter Palfrader. 19477 19478 o Minor bugfixes (tests): 19479 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug 19480 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker". 19481 19482 19483Changes in version 0.2.6.8 - 2015-05-21 19484 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and 19485 fixes an authority-side bug in assigning the HSDir flag. All directory 19486 authorities should upgrade. 19487 19488 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha): 19489 - Revert commit that made directory authorities assign the HSDir 19490 flag to relays without a DirPort; this was bad because such relays 19491 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix 19492 on 0.2.6.3-alpha. 19493 19494 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha): 19495 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on 19496 a client authorized hidden service. Fixes bug 15823; bugfix 19497 on 0.2.1.6-alpha. 19498 19499 o Minor features (geoip): 19500 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database. 19501 - Update geoip6 to the April 8 2015 Maxmind GeoLite2 19502 Country database. 19503 19504 19505Changes in version 0.2.7.1-alpha - 2015-05-12 19506 Tor 0.2.7.1-alpha is the first alpha release in its series. It 19507 includes numerous small features and bugfixes against previous Tor 19508 versions, and numerous small infrastructure improvements. The most 19509 notable features are several new ways for controllers to interact with 19510 the hidden services subsystem. 19511 19512 o New system requirements: 19513 - Tor no longer includes workarounds to support Libevent versions 19514 before 1.3e. Libevent 2.0 or later is recommended. Closes 19515 ticket 15248. 19516 19517 o Major features (controller): 19518 - Add the ADD_ONION and DEL_ONION commands that allow the creation 19519 and management of hidden services via the controller. Closes 19520 ticket 6411. 19521 - New "GETINFO onions/current" and "GETINFO onions/detached" 19522 commands to get information about hidden services created via the 19523 controller. Part of ticket 6411. 19524 - New HSFETCH command to launch a request for a hidden service 19525 descriptor. Closes ticket 14847. 19526 - New HSPOST command to upload a hidden service descriptor. Closes 19527 ticket 3523. Patch by "DonnchaC". 19528 19529 o Major bugfixes (hidden services): 19530 - Revert commit that made directory authorities assign the HSDir 19531 flag to relays without a DirPort; this was bad because such relays 19532 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix 19533 on 0.2.6.3-alpha. 19534 19535 o Minor features (clock-jump tolerance): 19536 - Recover better when our clock jumps back many hours, like might 19537 happen for Tails or Whonix users who start with a very wrong 19538 hardware clock, use Tor to discover a more accurate time, and then 19539 fix their clock. Resolves part of ticket 8766. 19540 19541 o Minor features (command-line interface): 19542 - Make --hash-password imply --hush to prevent unnecessary noise. 19543 Closes ticket 15542. Patch from "cypherpunks". 19544 - Print a warning whenever we find a relative file path being used 19545 as torrc option. Resolves issue 14018. 19546 19547 o Minor features (controller): 19548 - Add DirAuthority lines for default directory authorities to the 19549 output of the "GETINFO config/defaults" command if not already 19550 present. Implements ticket 14840. 19551 - Controllers can now use "GETINFO hs/client/desc/id/..." to 19552 retrieve items from the client's hidden service descriptor cache. 19553 Closes ticket 14845. 19554 - Implement a new controller command "GETINFO status/fresh-relay- 19555 descs" to fetch a descriptor/extrainfo pair that was generated on 19556 demand just for the controller's use. Implements ticket 14784. 19557 19558 o Minor features (DoS-resistance): 19559 - Make it harder for attackers to overload hidden services with 19560 introductions, by blocking multiple introduction requests on the 19561 same circuit. Resolves ticket 15515. 19562 19563 o Minor features (geoip): 19564 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database. 19565 - Update geoip6 to the April 8 2015 Maxmind GeoLite2 19566 Country database. 19567 19568 o Minor features (HS popularity countermeasure): 19569 - To avoid leaking HS popularity, don't cycle the introduction point 19570 when we've handled a fixed number of INTRODUCE2 cells but instead 19571 cycle it when a random number of introductions is reached, thus 19572 making it more difficult for an attacker to find out the amount of 19573 clients that have used the introduction point for a specific HS. 19574 Closes ticket 15745. 19575 19576 o Minor features (logging): 19577 - Include the Tor version in all LD_BUG log messages, since people 19578 tend to cut and paste those into the bugtracker. Implements 19579 ticket 15026. 19580 19581 o Minor features (pluggable transports): 19582 - When launching managed pluggable transports on Linux systems, 19583 attempt to have the kernel deliver a SIGTERM on tor exit if the 19584 pluggable transport process is still running. Resolves 19585 ticket 15471. 19586 - When launching managed pluggable transports, setup a valid open 19587 stdin in the child process that can be used to detect if tor has 19588 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable 19589 can be used by implementations to detect this new behavior. 19590 Resolves ticket 15435. 19591 19592 o Minor features (testing): 19593 - Add a test to verify that the compiler does not eliminate our 19594 memwipe() implementation. Closes ticket 15377. 19595 - Add make rule `check-changes` to verify the format of changes 19596 files. Closes ticket 15180. 19597 - Add unit tests for control_event_is_interesting(). Add a compile- 19598 time check that the number of events doesn't exceed the capacity 19599 of control_event_t.event_mask. Closes ticket 15431, checks for 19600 bugs similar to 13085. Patch by "teor". 19601 - Command-line argument tests moved to Stem. Resolves ticket 14806. 19602 - Integrate the ntor, backtrace, and zero-length keys tests into the 19603 automake test suite. Closes ticket 15344. 19604 - Remove assertions during builds to determine Tor's test coverage. 19605 We don't want to trigger these even in assertions, so including 19606 them artificially makes our branch coverage look worse than it is. 19607 This patch provides the new test-stem-full and coverage-html-full 19608 configure options. Implements ticket 15400. 19609 19610 o Minor bugfixes (build): 19611 - Improve out-of-tree builds by making non-standard rules work and 19612 clean up additional files and directories. Fixes bug 15053; bugfix 19613 on 0.2.7.0-alpha. 19614 19615 o Minor bugfixes (command-line interface): 19616 - When "--quiet" is provided along with "--validate-config", do not 19617 write anything to stdout on success. Fixes bug 14994; bugfix 19618 on 0.2.3.3-alpha. 19619 - When complaining about bad arguments to "--dump-config", use 19620 stderr, not stdout. 19621 19622 o Minor bugfixes (configuration, unit tests): 19623 - Only add the default fallback directories when the DirAuthorities, 19624 AlternateDirAuthority, and FallbackDir directory config options 19625 are set to their defaults. The default fallback directory list is 19626 currently empty, this fix will only change tor's behavior when it 19627 has default fallback directories. Includes unit tests for 19628 consider_adding_dir_servers(). Fixes bug 15642; bugfix on 19629 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor". 19630 19631 o Minor bugfixes (correctness): 19632 - For correctness, avoid modifying a constant string in 19633 handle_control_postdescriptor. Fixes bug 15546; bugfix 19634 on 0.1.1.16-rc. 19635 - Remove side-effects from tor_assert() calls. This was harmless, 19636 because we never disable assertions, but it is bad style and 19637 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36, 19638 and 0.2.0.10. 19639 19640 o Minor bugfixes (hidden service): 19641 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on 19642 a client authorized hidden service. Fixes bug 15823; bugfix 19643 on 0.2.1.6-alpha. 19644 - Remove an extraneous newline character from the end of hidden 19645 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha. 19646 19647 o Minor bugfixes (interface): 19648 - Print usage information for --dump-config when it is used without 19649 an argument. Also, fix the error message to use different wording 19650 and add newline at the end. Fixes bug 15541; bugfix 19651 on 0.2.5.1-alpha. 19652 19653 o Minor bugfixes (logs): 19654 - When building Tor under Clang, do not include an extra set of 19655 parentheses in log messages that include function names. Fixes bug 19656 15269; bugfix on every released version of Tor when compiled with 19657 recent enough Clang. 19658 19659 o Minor bugfixes (network): 19660 - When attempting to use fallback technique for network interface 19661 lookup, disregard loopback and multicast addresses since they are 19662 unsuitable for public communications. 19663 19664 o Minor bugfixes (statistics): 19665 - Disregard the ConnDirectionStatistics torrc options when Tor is 19666 not a relay since in that mode of operation no sensible data is 19667 being collected and because Tor might run into measurement hiccups 19668 when running as a client for some time, then becoming a relay. 19669 Fixes bug 15604; bugfix on 0.2.2.35. 19670 19671 o Minor bugfixes (test networks): 19672 - When self-testing reachability, use ExtendAllowPrivateAddresses to 19673 determine if local/private addresses imply reachability. The 19674 previous fix used TestingTorNetwork, which implies 19675 ExtendAllowPrivateAddresses, but this excluded rare configurations 19676 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is 19677 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor", 19678 issue discovered by CJ Ess. 19679 19680 o Minor bugfixes (testing): 19681 - Check for matching value in server response in ntor_ref.py. Fixes 19682 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed 19683 by "joelanders". 19684 - Set the severity correctly when testing 19685 get_interface_addresses_ifaddrs() and 19686 get_interface_addresses_win32(), so that the tests fail gracefully 19687 instead of triggering an assertion. Fixes bug 15759; bugfix on 19688 0.2.6.3-alpha. Reported by Nicolas Derive. 19689 19690 o Code simplification and refactoring: 19691 - Move the hacky fallback code out of get_interface_address6() into 19692 separate function and get it covered with unit-tests. Resolves 19693 ticket 14710. 19694 - Refactor hidden service client-side cache lookup to intelligently 19695 report its various failure cases, and disentangle failure cases 19696 involving a lack of introduction points. Closes ticket 14391. 19697 - Use our own Base64 encoder instead of OpenSSL's, to allow more 19698 control over the output. Part of ticket 15652. 19699 19700 o Documentation: 19701 - Improve the descriptions of statistics-related torrc options in 19702 the manpage to describe rationale and possible uses cases. Fixes 19703 issue 15550. 19704 - Improve the layout and formatting of ./configure --help messages. 19705 Closes ticket 15024. Patch from "cypherpunks". 19706 - Standardize on the term "server descriptor" in the manual page. 19707 Previously, we had used "router descriptor", "server descriptor", 19708 and "relay descriptor" interchangeably. Part of ticket 14987. 19709 19710 o Removed code: 19711 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code 19712 and always use the internal Base64 decoder. The internal decoder 19713 has been part of tor since 0.2.0.10-alpha, and no one should 19714 be using the OpenSSL one. Part of ticket 15652. 19715 - Remove the 'tor_strclear()' function; use memwipe() instead. 19716 Closes ticket 14922. 19717 19718 o Removed features: 19719 - Remove the (seldom-used) DynamicDHGroups feature. For anti- 19720 fingerprinting we now recommend pluggable transports; for forward- 19721 secrecy in TLS, we now use the P-256 group. Closes ticket 13736. 19722 - Remove the undocumented "--digests" command-line option. It 19723 complicated our build process, caused subtle build issues on 19724 multiple platforms, and is now redundant since we started 19725 including git version identifiers. Closes ticket 14742. 19726 - Tor no longer contains checks for ancient directory cache versions 19727 that didn't know about microdescriptors. 19728 - Tor no longer contains workarounds for stat files generated by 19729 super-old versions of Tor that didn't choose guards sensibly. 19730 19731 19732Changes in version 0.2.4.27 - 2015-04-06 19733 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that 19734 could be used by an attacker to crash hidden services, or crash clients 19735 visiting hidden services. Hidden services should upgrade as soon as 19736 possible; clients should upgrade whenever packages become available. 19737 19738 This release also backports a simple improvement to make hidden 19739 services a bit less vulnerable to denial-of-service attacks. 19740 19741 o Major bugfixes (security, hidden service): 19742 - Fix an issue that would allow a malicious client to trigger an 19743 assertion failure and halt a hidden service. Fixes bug 15600; 19744 bugfix on 0.2.1.6-alpha. Reported by "disgleirio". 19745 - Fix a bug that could cause a client to crash with an assertion 19746 failure when parsing a malformed hidden service descriptor. Fixes 19747 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC". 19748 19749 o Minor features (DoS-resistance, hidden service): 19750 - Introduction points no longer allow multiple INTRODUCE1 cells to 19751 arrive on the same circuit. This should make it more expensive for 19752 attackers to overwhelm hidden services with introductions. 19753 Resolves ticket 15515. 19754 19755 19756Changes in version 0.2.5.12 - 2015-04-06 19757 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that 19758 could be used by an attacker to crash hidden services, or crash clients 19759 visiting hidden services. Hidden services should upgrade as soon as 19760 possible; clients should upgrade whenever packages become available. 19761 19762 This release also backports a simple improvement to make hidden 19763 services a bit less vulnerable to denial-of-service attacks. 19764 19765 o Major bugfixes (security, hidden service): 19766 - Fix an issue that would allow a malicious client to trigger an 19767 assertion failure and halt a hidden service. Fixes bug 15600; 19768 bugfix on 0.2.1.6-alpha. Reported by "disgleirio". 19769 - Fix a bug that could cause a client to crash with an assertion 19770 failure when parsing a malformed hidden service descriptor. Fixes 19771 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC". 19772 19773 o Minor features (DoS-resistance, hidden service): 19774 - Introduction points no longer allow multiple INTRODUCE1 cells to 19775 arrive on the same circuit. This should make it more expensive for 19776 attackers to overwhelm hidden services with introductions. 19777 Resolves ticket 15515. 19778 19779 19780Changes in version 0.2.6.7 - 2015-04-06 19781 Tor 0.2.6.7 fixes two security issues that could be used by an 19782 attacker to crash hidden services, or crash clients visiting hidden 19783 services. Hidden services should upgrade as soon as possible; clients 19784 should upgrade whenever packages become available. 19785 19786 This release also contains two simple improvements to make hidden 19787 services a bit less vulnerable to denial-of-service attacks. 19788 19789 o Major bugfixes (security, hidden service): 19790 - Fix an issue that would allow a malicious client to trigger an 19791 assertion failure and halt a hidden service. Fixes bug 15600; 19792 bugfix on 0.2.1.6-alpha. Reported by "disgleirio". 19793 - Fix a bug that could cause a client to crash with an assertion 19794 failure when parsing a malformed hidden service descriptor. Fixes 19795 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC". 19796 19797 o Minor features (DoS-resistance, hidden service): 19798 - Introduction points no longer allow multiple INTRODUCE1 cells to 19799 arrive on the same circuit. This should make it more expensive for 19800 attackers to overwhelm hidden services with introductions. 19801 Resolves ticket 15515. 19802 - Decrease the amount of reattempts that a hidden service performs 19803 when its rendezvous circuits fail. This reduces the computational 19804 cost for running a hidden service under heavy load. Resolves 19805 ticket 11447. 19806 19807 19808Changes in version 0.2.6.6 - 2015-03-24 19809 Tor 0.2.6.6 is the first stable release in the 0.2.6 series. 19810 19811 It adds numerous safety, security, correctness, and performance 19812 improvements. Client programs can be configured to use more kinds of 19813 sockets, AutomapHosts works better, the multithreading backend is 19814 improved, cell transmission is refactored, test coverage is much 19815 higher, more denial-of-service attacks are handled, guard selection is 19816 improved to handle long-term guards better, pluggable transports 19817 should work a bit better, and some annoying hidden service performance 19818 bugs should be addressed. 19819 19820 o Minor bugfixes (portability): 19821 - Use the correct datatype in the SipHash-2-4 function to prevent 19822 compilers from assuming any sort of alignment. Fixes bug 15436; 19823 bugfix on 0.2.5.3-alpha. 19824 19825Changes in version 0.2.6.5-rc - 2015-03-18 19826 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in 19827 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc. 19828 19829 o Major bugfixes (client): 19830 - Avoid crashing when making certain configuration option changes on 19831 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported 19832 by "anonym". 19833 19834 o Major bugfixes (pluggable transports): 19835 - Initialize the extended OR Port authentication cookie before 19836 launching pluggable transports. This prevents a race condition 19837 that occurred when server-side pluggable transports would cache the 19838 authentication cookie before it has been (re)generated. Fixes bug 19839 15240; bugfix on 0.2.5.1-alpha. 19840 19841 o Major bugfixes (portability): 19842 - Do not crash on startup when running on Solaris. Fixes a bug 19843 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported 19844 by "ruebezahl". 19845 19846 o Minor features (heartbeat): 19847 - On relays, report how many connections we negotiated using each 19848 version of the Tor link protocols. This information will let us 19849 know if removing support for very old versions of the Tor 19850 protocols is harming the network. Closes ticket 15212. 19851 19852 o Code simplification and refactoring: 19853 - Refactor main loop to extract the 'loop' part. This makes it 19854 easier to run Tor under Shadow. Closes ticket 15176. 19855 19856 19857Changes in version 0.2.5.11 - 2015-03-17 19858 Tor 0.2.5.11 is the second stable release in the 0.2.5 series. 19859 19860 It backports several bugfixes from the 0.2.6 branch, including a 19861 couple of medium-level security fixes for relays and exit nodes. 19862 It also updates the list of directory authorities. 19863 19864 o Directory authority changes: 19865 - Remove turtles as a directory authority. 19866 - Add longclaw as a new (v3) directory authority. This implements 19867 ticket 13296. This keeps the directory authority count at 9. 19868 - The directory authority Faravahar has a new IP address. This 19869 closes ticket 14487. 19870 19871 o Major bugfixes (crash, OSX, security): 19872 - Fix a remote denial-of-service opportunity caused by a bug in 19873 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared 19874 in OSX 10.9. 19875 19876 o Major bugfixes (relay, stability, possible security): 19877 - Fix a bug that could lead to a relay crashing with an assertion 19878 failure if a buffer of exactly the wrong layout was passed to 19879 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on 19880 0.2.0.10-alpha. Patch from 'cypherpunks'. 19881 - Do not assert if the 'data' pointer on a buffer is advanced to the 19882 very end of the buffer; log a BUG message instead. Only assert if 19883 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha. 19884 19885 o Major bugfixes (exit node stability): 19886 - Fix an assertion failure that could occur under high DNS load. 19887 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr"; 19888 diagnosed and fixed by "cypherpunks". 19889 19890 o Major bugfixes (Linux seccomp2 sandbox): 19891 - Upon receiving sighup with the seccomp2 sandbox enabled, do not 19892 crash during attempts to call wait4. Fixes bug 15088; bugfix on 19893 0.2.5.1-alpha. Patch from "sanic". 19894 19895 o Minor features (controller): 19896 - New "GETINFO bw-event-cache" to get information about recent 19897 bandwidth events. Closes ticket 14128. Useful for controllers to 19898 get recent bandwidth history after the fix for ticket 13988. 19899 19900 o Minor features (geoip): 19901 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database. 19902 - Update geoip6 to the March 3 2015 Maxmind GeoLite2 19903 Country database. 19904 19905 o Minor bugfixes (client, automapping): 19906 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when 19907 no value follows the option. Fixes bug 14142; bugfix on 19908 0.2.4.7-alpha. Patch by "teor". 19909 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug 19910 14195; bugfix on 0.1.0.1-rc. 19911 19912 o Minor bugfixes (compilation): 19913 - Build without warnings with the stock OpenSSL srtp.h header, which 19914 has a duplicate declaration of SSL_get_selected_srtp_profile(). 19915 Fixes bug 14220; this is OpenSSL's bug, not ours. 19916 19917 o Minor bugfixes (directory authority): 19918 - Allow directory authorities to fetch more data from one another if 19919 they find themselves missing lots of votes. Previously, they had 19920 been bumping against the 10 MB queued data limit. Fixes bug 14261; 19921 bugfix on 0.1.2.5-alpha. 19922 - Enlarge the buffer to read bwauth generated files to avoid an 19923 issue when parsing the file in dirserv_read_measured_bandwidths(). 19924 Fixes bug 14125; bugfix on 0.2.2.1-alpha. 19925 19926 o Minor bugfixes (statistics): 19927 - Increase period over which bandwidth observations are aggregated 19928 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1. 19929 19930 o Minor bugfixes (preventative security, C safety): 19931 - When reading a hexadecimal, base-32, or base-64 encoded value from 19932 a string, always overwrite the whole output buffer. This prevents 19933 some bugs where we would look at (but fortunately, not reveal) 19934 uninitialized memory on the stack. Fixes bug 14013; bugfix on all 19935 versions of Tor. 19936 19937 19938Changes in version 0.2.4.26 - 2015-03-17 19939 Tor 0.2.4.26 includes an updated list of directory authorities. It 19940 also backports a couple of stability and security bugfixes from 0.2.5 19941 and beyond. 19942 19943 o Directory authority changes: 19944 - Remove turtles as a directory authority. 19945 - Add longclaw as a new (v3) directory authority. This implements 19946 ticket 13296. This keeps the directory authority count at 9. 19947 - The directory authority Faravahar has a new IP address. This 19948 closes ticket 14487. 19949 19950 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha): 19951 - Fix an assertion failure that could occur under high DNS load. 19952 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr"; 19953 diagnosed and fixed by "cypherpunks". 19954 19955 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc): 19956 - Fix a bug that could lead to a relay crashing with an assertion 19957 failure if a buffer of exactly the wrong layout was passed to 19958 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on 19959 0.2.0.10-alpha. Patch from 'cypherpunks'. 19960 - Do not assert if the 'data' pointer on a buffer is advanced to the 19961 very end of the buffer; log a BUG message instead. Only assert if 19962 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha. 19963 19964 o Minor features (geoip): 19965 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database. 19966 - Update geoip6 to the March 3 2015 Maxmind GeoLite2 19967 Country database. 19968 19969Changes in version 0.2.6.4-rc - 2015-03-09 19970 Tor 0.2.6.4-alpha fixes an issue in the directory code that an 19971 attacker might be able to use in order to crash certain Tor 19972 directories. It also resolves some minor issues left over from, or 19973 introduced in, Tor 0.2.6.3-alpha or earlier. 19974 19975 o Major bugfixes (crash, OSX, security): 19976 - Fix a remote denial-of-service opportunity caused by a bug in 19977 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared 19978 in OSX 10.9. 19979 19980 o Major bugfixes (relay, stability, possible security): 19981 - Fix a bug that could lead to a relay crashing with an assertion 19982 failure if a buffer of exactly the wrong layout is passed to 19983 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on 19984 0.2.0.10-alpha. Patch from "cypherpunks". 19985 - Do not assert if the 'data' pointer on a buffer is advanced to the 19986 very end of the buffer; log a BUG message instead. Only assert if 19987 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha. 19988 19989 o Major bugfixes (FreeBSD IPFW transparent proxy): 19990 - Fix address detection with FreeBSD transparent proxies, when 19991 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix 19992 on 0.2.5.4-alpha. 19993 19994 o Major bugfixes (Linux seccomp2 sandbox): 19995 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux 19996 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix 19997 on 0.2.6.3-alpha. 19998 - Allow AF_UNIX hidden services to be used with the seccomp2 19999 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha. 20000 - Upon receiving sighup with the seccomp2 sandbox enabled, do not 20001 crash during attempts to call wait4. Fixes bug 15088; bugfix on 20002 0.2.5.1-alpha. Patch from "sanic". 20003 20004 o Minor features (controller): 20005 - Messages about problems in the bootstrap process now include 20006 information about the server we were trying to connect to when we 20007 noticed the problem. Closes ticket 15006. 20008 20009 o Minor features (geoip): 20010 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database. 20011 - Update geoip6 to the March 3 2015 Maxmind GeoLite2 20012 Country database. 20013 20014 o Minor features (logs): 20015 - Quiet some log messages in the heartbeat and at startup. Closes 20016 ticket 14950. 20017 20018 o Minor bugfixes (certificate handling): 20019 - If an authority operator accidentally makes a signing certificate 20020 with a future publication time, do not discard its real signing 20021 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha. 20022 - Remove any old authority certificates that have been superseded 20023 for at least two days. Previously, we would keep superseded 20024 certificates until they expired, if they were published close in 20025 time to the certificate that superseded them. Fixes bug 11454; 20026 bugfix on 0.2.1.8-alpha. 20027 20028 o Minor bugfixes (compilation): 20029 - Fix a compilation warning on s390. Fixes bug 14988; bugfix 20030 on 0.2.5.2-alpha. 20031 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix 20032 on 0.2.6.2-alpha. 20033 20034 o Minor bugfixes (testing): 20035 - Fix endianness issues in unit test for resolve_my_address() to 20036 have it pass on big endian systems. Fixes bug 14980; bugfix on 20037 Tor 0.2.6.3-alpha. 20038 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug 20039 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt. 20040 - When running the new 'make test-stem' target, use the configured 20041 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch 20042 from "cypherpunks". 20043 - When running the zero-length-keys tests, do not use the default 20044 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported 20045 by "reezer". 20046 20047 o Directory authority IP change: 20048 - The directory authority Faravahar has a new IP address. This 20049 closes ticket 14487. 20050 20051 o Removed code: 20052 - Remove some lingering dead code that once supported mempools. 20053 Mempools were disabled by default in 0.2.5, and removed entirely 20054 in 0.2.6.3-alpha. Closes more of ticket 14848; patch 20055 by "cypherpunks". 20056 20057 20058Changes in version 0.2.6.3-alpha - 2015-02-19 20059 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in 20060 the 0.2.6.x series. It introduces support for more kinds of sockets, 20061 makes it harder to accidentally run an exit, improves our 20062 multithreading backend, incorporates several fixes for the 20063 AutomapHostsOnResolve option, and fixes numerous other bugs besides. 20064 20065 If no major regressions or security holes are found in this version, 20066 the next version will be a release candidate. 20067 20068 o Deprecated versions: 20069 - Tor relays older than 0.2.4.18-rc are no longer allowed to 20070 advertise themselves on the network. Closes ticket 13555. 20071 20072 o Major features (security, unix domain sockets): 20073 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk 20074 applications can reach Tor without having to create AF_INET or 20075 AF_INET6 sockets, meaning they can completely disable their 20076 ability to make non-Tor network connections. To create a socket of 20077 this type, use "SocksPort unix:/path/to/socket". Implements 20078 ticket 12585. 20079 - Support mapping hidden service virtual ports to AF_UNIX sockets. 20080 The syntax is "HiddenServicePort 80 unix:/path/to/socket". 20081 Implements ticket 11485. 20082 20083 o Major features (changed defaults): 20084 - Prevent relay operators from unintentionally running exits: When a 20085 relay is configured as an exit node, we now warn the user unless 20086 the "ExitRelay" option is set to 1. We warn even more loudly if 20087 the relay is configured with the default exit policy, since this 20088 can indicate accidental misconfiguration. Setting "ExitRelay 0" 20089 stops Tor from running as an exit relay. Closes ticket 10067. 20090 20091 o Major features (directory system): 20092 - When downloading server- or microdescriptors from a directory 20093 server, we no longer launch multiple simultaneous requests to the 20094 same server. This reduces load on the directory servers, 20095 especially when directory guards are in use. Closes ticket 9969. 20096 - When downloading server- or microdescriptors over a tunneled 20097 connection, do not limit the length of our requests to what the 20098 Squid proxy is willing to handle. Part of ticket 9969. 20099 - Authorities can now vote on the correct digests and latest 20100 versions for different software packages. This allows packages 20101 that include Tor to use the Tor authority system as a way to get 20102 notified of updates and their correct digests. Implements proposal 20103 227. Closes ticket 10395. 20104 20105 o Major features (guards): 20106 - Introduce the Guardfraction feature to improves load balancing on 20107 guard nodes. Specifically, it aims to reduce the traffic gap that 20108 guard nodes experience when they first get the Guard flag. This is 20109 a required step if we want to increase the guard lifetime to 9 20110 months or greater. Closes ticket 9321. 20111 20112 o Major features (performance): 20113 - Make the CPU worker implementation more efficient by avoiding the 20114 kernel and lengthening pipelines. The original implementation used 20115 sockets to transfer data from the main thread to the workers, and 20116 didn't allow any thread to be assigned more than a single piece of 20117 work at once. The new implementation avoids communications 20118 overhead by making requests in shared memory, avoiding kernel IO 20119 where possible, and keeping more requests in flight at once. 20120 Implements ticket 9682. 20121 20122 o Major features (relay): 20123 - Raise the minimum acceptable configured bandwidth rate for bridges 20124 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were 20125 20 KiB/sec.) Closes ticket 13822. 20126 20127 o Major bugfixes (exit node stability): 20128 - Fix an assertion failure that could occur under high DNS load. 20129 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr"; 20130 diagnosed and fixed by "cypherpunks". 20131 20132 o Major bugfixes (mixed relay-client operation): 20133 - When running as a relay and client at the same time (not 20134 recommended), if we decide not to use a new guard because we want 20135 to retry older guards, only close the locally-originating circuits 20136 passing through that guard. Previously we would close all the 20137 circuits through that guard. Fixes bug 9819; bugfix on 20138 0.2.1.1-alpha. Reported by "skruffy". 20139 20140 o Minor features (build): 20141 - New --disable-system-torrc compile-time option to prevent Tor from 20142 looking for the system-wide torrc or torrc-defaults files. 20143 Resolves ticket 13037. 20144 20145 o Minor features (controller): 20146 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller 20147 events so controllers can observe circuit isolation inputs. Closes 20148 ticket 8405. 20149 - ControlPort now supports the unix:/path/to/socket syntax as an 20150 alternative to the ControlSocket option, for consistency with 20151 SocksPort and HiddenServicePort. Closes ticket 14451. 20152 - New "GETINFO bw-event-cache" to get information about recent 20153 bandwidth events. Closes ticket 14128. Useful for controllers to 20154 get recent bandwidth history after the fix for ticket 13988. 20155 20156 o Minor features (Denial of service resistance): 20157 - Count the total number of bytes used storing hidden service 20158 descriptors against the value of MaxMemInQueues. If we're low on 20159 memory, and more than 20% of our memory is used holding hidden 20160 service descriptors, free them until no more than 10% of our 20161 memory holds hidden service descriptors. Free the least recently 20162 fetched descriptors first. Resolves ticket 13806. 20163 - When we have recently been under memory pressure (over 3/4 of 20164 MaxMemInQueues is allocated), then allocate smaller zlib objects 20165 for small requests. Closes ticket 11791. 20166 20167 o Minor features (geoip): 20168 - Update geoip and geoip6 files to the January 7 2015 Maxmind 20169 GeoLite2 Country database. 20170 20171 o Minor features (guard nodes): 20172 - Reduce the time delay before saving guard status to disk from 10 20173 minutes to 30 seconds (or from one hour to 10 minutes if 20174 AvoidDiskWrites is set). Closes ticket 12485. 20175 20176 o Minor features (hidden service): 20177 - Make Sybil attacks against hidden services harder by changing the 20178 minimum time required to get the HSDir flag from 25 hours up to 96 20179 hours. Addresses ticket 14149. 20180 - New option "HiddenServiceAllowUnknownPorts" to allow hidden 20181 services to disable the anti-scanning feature introduced in 20182 0.2.6.2-alpha. With this option not set, a connection to an 20183 unlisted port closes the circuit. With this option set, only a 20184 RELAY_DONE cell is sent. Closes ticket 14084. 20185 20186 o Minor features (interface): 20187 - Implement "-f -" command-line option to read torrc configuration 20188 from standard input, if you don't want to store the torrc file in 20189 the file system. Implements feature 13865. 20190 20191 o Minor features (logging): 20192 - Add a count of unique clients to the bridge heartbeat message. 20193 Resolves ticket 6852. 20194 - Suppress "router info incompatible with extra info" message when 20195 reading extrainfo documents from cache. (This message got loud 20196 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes 20197 ticket 13762. 20198 - Elevate hidden service authorized-client message from DEBUG to 20199 INFO. Closes ticket 14015. 20200 20201 o Minor features (stability): 20202 - Add assertions in our hash-table iteration code to check for 20203 corrupted values that could cause infinite loops. Closes 20204 ticket 11737. 20205 20206 o Minor features (systemd): 20207 - Various improvements and modernizations in systemd hardening 20208 support. Closes ticket 13805. Patch from Craig Andrews. 20209 20210 o Minor features (testing networks): 20211 - Drop the minimum RendPostPeriod on a testing network to 5 seconds, 20212 and the default on a testing network to 2 minutes. Drop the 20213 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but 20214 keep the default on a testing network at 30 seconds. This reduces 20215 HS bootstrap time to around 25 seconds. Also, change the default 20216 time in test-network.sh to match. Closes ticket 13401. Patch 20217 by "teor". 20218 - Create TestingDirAuthVoteHSDir to correspond to 20219 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the 20220 HSDir flag for the listed relays regardless of uptime or ORPort 20221 connectivity. Respects the value of VoteOnHidServDirectoriesV2. 20222 Partial implementation for ticket 14067. Patch by "teor". 20223 20224 o Minor features (tor2web mode): 20225 - Introduce the config option Tor2webRendezvousPoints, which allows 20226 clients in Tor2webMode to select a specific Rendezvous Point to be 20227 used in HS circuits. This might allow better performance for 20228 Tor2Web nodes. Implements ticket 12844. 20229 20230 o Minor bugfixes (client DNS): 20231 - Report the correct cached DNS expiration times on SOCKS port or in 20232 DNS replies. Previously, we would report everything as "never 20233 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta. 20234 - Avoid a small memory leak when we find a cached answer for a 20235 reverse DNS lookup in a client-side DNS cache. (Remember, client- 20236 side DNS caching is off by default, and is not recommended.) Fixes 20237 bug 14259; bugfix on 0.2.0.1-alpha. 20238 20239 o Minor bugfixes (client, automapping): 20240 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when 20241 no value follows the option. Fixes bug 14142; bugfix on 20242 0.2.4.7-alpha. Patch by "teor". 20243 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug 20244 14195; bugfix on 0.1.0.1-rc. 20245 - Prevent changes to other options from removing the wildcard value 20246 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix 20247 on 0.2.0.1-alpha. 20248 - Allow MapAddress and AutomapHostsOnResolve to work together when 20249 an address is mapped into another address type (like .onion) that 20250 must be automapped at resolve time. Fixes bug 7555; bugfix 20251 on 0.2.0.1-alpha. 20252 20253 o Minor bugfixes (client, bridges): 20254 - When we are using bridges and we had a network connectivity 20255 problem, only retry connecting to our currently configured 20256 bridges, not all bridges we know about and remember using. Fixes 20257 bug 14216; bugfix on 0.2.2.17-alpha. 20258 20259 o Minor bugfixes (client, IPv6): 20260 - Reject socks requests to literal IPv6 addresses when IPv6Traffic 20261 flag is not set; and not because the NoIPv4Traffic flag was set. 20262 Previously we'd looked at the NoIPv4Traffic flag for both types of 20263 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha. 20264 20265 o Minor bugfixes (compilation): 20266 - The address of an array in the middle of a structure will always 20267 be non-NULL. clang recognises this and complains. Disable the 20268 tautologous and redundant check to silence this warning. Fixes bug 20269 14001; bugfix on 0.2.1.2-alpha. 20270 - Avoid warnings when building with systemd 209 or later. Fixes bug 20271 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev". 20272 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers. 20273 Addresses ticket 14188. 20274 - Build without warnings with the stock OpenSSL srtp.h header, which 20275 has a duplicate declaration of SSL_get_selected_srtp_profile(). 20276 Fixes bug 14220; this is OpenSSL's bug, not ours. 20277 - Do not compile any code related to Tor2Web mode when Tor2Web mode 20278 is not enabled at compile time. Previously, this code was included 20279 in a disabled state. See discussion on ticket 12844. 20280 - Remove the --disable-threads configure option again. It was 20281 accidentally partially reintroduced in 29ac883606d6d. Fixes bug 20282 14819; bugfix on 0.2.6.2-alpha. 20283 20284 o Minor bugfixes (controller): 20285 - Report "down" in response to the "GETINFO entry-guards" command 20286 when relays are down with an unreachable_since value. Previously, 20287 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha. 20288 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug 20289 14116; bugfix on 0.2.2.9-alpha. 20290 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close 20291 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha. 20292 20293 o Minor bugfixes (directory authority): 20294 - Allow directory authorities to fetch more data from one another if 20295 they find themselves missing lots of votes. Previously, they had 20296 been bumping against the 10 MB queued data limit. Fixes bug 14261; 20297 bugfix on 0.1.2.5-alpha. 20298 - Do not attempt to download extrainfo documents which we will be 20299 unable to validate with a matching server descriptor. Fixes bug 20300 13762; bugfix on 0.2.0.1-alpha. 20301 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the 20302 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha. 20303 - Enlarge the buffer to read bwauth generated files to avoid an 20304 issue when parsing the file in dirserv_read_measured_bandwidths(). 20305 Fixes bug 14125; bugfix on 0.2.2.1-alpha. 20306 20307 o Minor bugfixes (file handling): 20308 - Stop failing when key files are zero-length. Instead, generate new 20309 keys, and overwrite the empty key files. Fixes bug 13111; bugfix 20310 on all versions of Tor. Patch by "teor". 20311 - Stop generating a fresh .old RSA onion key file when the .old file 20312 is missing. Fixes part of 13111; bugfix on 0.0.6rc1. 20313 - Avoid overwriting .old key files with empty key files. 20314 - Skip loading zero-length extrainfo store, router store, stats, 20315 state, and key files. 20316 - Avoid crashing when trying to reload a torrc specified as a 20317 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix 20318 on 0.2.3.11-alpha. 20319 20320 o Minor bugfixes (hidden services): 20321 - Close the introduction circuit when we have no more usable intro 20322 points, instead of waiting for it to time out. This also ensures 20323 that no follow-up HS descriptor fetch is triggered when the 20324 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6. 20325 - When fetching a hidden service descriptor for a down service that 20326 was recently up, do not keep refetching until we try the same 20327 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha. 20328 - Successfully launch Tor with a nonexistent hidden service 20329 directory. Our fix for bug 13942 didn't catch this case. Fixes bug 20330 14106; bugfix on 0.2.6.2-alpha. 20331 20332 o Minor bugfixes (logging): 20333 - Avoid crashing when there are more log domains than entries in 20334 domain_list. Bugfix on 0.2.3.1-alpha. 20335 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix 20336 on 0.2.6.1-alpha. 20337 - Don't log messages to stdout twice when starting up. Fixes bug 20338 13993; bugfix on 0.2.6.1-alpha. 20339 20340 o Minor bugfixes (parsing): 20341 - Stop accepting milliseconds (or other junk) at the end of 20342 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25. 20343 - Support two-number and three-number version numbers correctly, in 20344 case we change the Tor versioning system in the future. Fixes bug 20345 13661; bugfix on 0.0.8pre1. 20346 20347 o Minor bugfixes (path counting): 20348 - When deciding whether the consensus lists any exit nodes, count 20349 the number listed in the consensus, not the number we have 20350 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha. 20351 - When deciding whether we have any exit nodes, only examine 20352 ExitNodes when the ExitNodes option is actually set. Fixes part of 20353 bug 14918; bugfix on 0.2.6.2-alpha. 20354 - Get rid of redundant and possibly scary warnings that we are 20355 missing directory information while we bootstrap. Fixes part of 20356 bug 14918; bugfix on 0.2.6.2-alpha. 20357 20358 o Minor bugfixes (portability): 20359 - Fix the ioctl()-based network interface lookup code so that it 20360 will work on systems that have variable-length struct ifreq, for 20361 example Mac OS X. 20362 - Fix scheduler compilation on targets where char is unsigned. Fixes 20363 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau. 20364 20365 o Minor bugfixes (sandbox): 20366 - Allow glibc fatal errors to be sent to stderr before Tor exits. 20367 Previously, glibc would try to write them to /dev/tty, and the 20368 sandbox would trap the call and make Tor exit prematurely. Fixes 20369 bug 14759; bugfix on 0.2.5.1-alpha. 20370 20371 o Minor bugfixes (shutdown): 20372 - When shutting down, always call event_del() on lingering read or 20373 write events before freeing them. Otherwise, we risk double-frees 20374 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix 20375 on 0.1.0.2-rc. 20376 20377 o Minor bugfixes (small memory leaks): 20378 - Avoid leaking memory when using IPv6 virtual address mappings. 20379 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van 20380 der Woerdt. 20381 20382 o Minor bugfixes (statistics): 20383 - Increase period over which bandwidth observations are aggregated 20384 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1. 20385 20386 o Minor bugfixes (systemd support): 20387 - Fix detection and operation of systemd watchdog. Fixes part of bug 20388 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz. 20389 - Run correctly under systemd with the RunAsDaemon option set. Fixes 20390 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz. 20391 - Inform the systemd supervisor about more changes in the Tor 20392 process status. Implements part of ticket 14141. Patch from 20393 Tomasz Torcz. 20394 - Cause the "--disable-systemd" option to actually disable systemd 20395 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch 20396 from "blueness". 20397 20398 o Minor bugfixes (TLS): 20399 - Check more thoroughly throughout the TLS code for possible 20400 unlogged TLS errors. Possible diagnostic or fix for bug 13319. 20401 20402 o Minor bugfixes (transparent proxy): 20403 - Use getsockname, not getsockopt, to retrieve the address for a 20404 TPROXY-redirected connection. Fixes bug 13796; bugfix 20405 on 0.2.5.2-alpha. 20406 20407 o Code simplification and refactoring: 20408 - Move fields related to isolating and configuring client ports into 20409 a shared structure. Previously, they were duplicated across 20410 port_cfg_t, listener_connection_t, and edge_connection_t. Failure 20411 to copy them correctly had been the cause of at least one bug in 20412 the past. Closes ticket 8546. 20413 - Refactor the get_interface_addresses_raw() doom-function into 20414 multiple smaller and simpler subfunctions. Cover the resulting 20415 subfunctions with unit-tests. Fixes a significant portion of 20416 issue 12376. 20417 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was 20418 only for version <= 0.2.2.24 which is now deprecated. Closes 20419 ticket 14202. 20420 - Remove a test for a long-defunct broken version-one 20421 directory server. 20422 20423 o Documentation: 20424 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc 20425 for writing the OpenBSD-specific tips. Resolves ticket 13702. 20426 - Make the tor-resolve documentation match its help string and its 20427 options. Resolves part of ticket 14325. 20428 - Log a more useful error message from tor-resolve when failing to 20429 look up a hidden service address. Resolves part of ticket 14325. 20430 20431 o Downgraded warnings: 20432 - Don't warn when we've attempted to contact a relay using the wrong 20433 ntor onion key. Closes ticket 9635. 20434 20435 o Removed features: 20436 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no 20437 longer silently accepted as an alias for "ExitNodes". 20438 - The --enable-mempool and --enable-buf-freelists options, which 20439 were originally created to work around bad malloc implementations, 20440 no longer exist. They were off-by-default in 0.2.5. Closes 20441 ticket 14848. 20442 20443 o Testing: 20444 - Make the checkdir/perms test complete successfully even if the 20445 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha. 20446 - Test that tor does not fail when key files are zero-length. Check 20447 that tor generates new keys, and overwrites the empty key files. 20448 - Test that tor generates new keys when keys are missing 20449 (existing behavior). 20450 - Test that tor does not overwrite key files that already contain 20451 data (existing behavior). Tests bug 13111. Patch by "teor". 20452 - New "make test-stem" target to run stem integration tests. 20453 Requires that the "STEM_SOURCE_DIR" environment variable be set. 20454 Closes ticket 14107. 20455 - Make the test_cmdline_args.py script work correctly on Windows. 20456 Patch from Gisle Vanem. 20457 - Move the slower unit tests into a new "./src/test/test-slow" 20458 binary that can be run independently of the other tests. Closes 20459 ticket 13243. 20460 - Avoid undefined behavior when sampling huge values from the 20461 Laplace distribution. This made unittests fail on Raspberry Pi. 20462 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha. 20463 20464 20465Changes in version 0.2.6.2-alpha - 2014-12-31 20466 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series. 20467 It introduces a major new backend for deciding when to send cells on 20468 channels, which should lead down the road to big performance 20469 increases. It contains security and statistics features for better 20470 work on hidden services, and numerous bugfixes. 20471 20472 This release contains many new unit tests, along with major 20473 performance improvements for running testing networks using Chutney. 20474 Thanks to a series of patches contributed by "teor", testing networks 20475 should now bootstrap in seconds, rather than minutes. 20476 20477 o Major features (relay, infrastructure): 20478 - Complete revision of the code that relays use to decide which cell 20479 to send next. Formerly, we selected the best circuit to write on 20480 each channel, but we didn't select among channels in any 20481 sophisticated way. Now, we choose the best circuits globally from 20482 among those whose channels are ready to deliver traffic. 20483 20484 This patch implements a new inter-cmux comparison API, a global 20485 high/low watermark mechanism and a global scheduler loop for 20486 transmission prioritization across all channels as well as among 20487 circuits on one channel. This schedule is currently tuned to 20488 (tolerantly) avoid making changes in network performance, but it 20489 should form the basis for major circuit performance increases in 20490 the future. Code by Andrea; tuning by Rob Jansen; implements 20491 ticket 9262. 20492 20493 o Major features (hidden services): 20494 - Make HS port scanning more difficult by immediately closing the 20495 circuit when a user attempts to connect to a nonexistent port. 20496 Closes ticket 13667. 20497 - Add a HiddenServiceStatistics option that allows Tor relays to 20498 gather and publish statistics about the overall size and volume of 20499 hidden service usage. Specifically, when this option is turned on, 20500 an HSDir will publish an approximate number of hidden services 20501 that have published descriptors to it the past 24 hours. Also, if 20502 a relay has acted as a hidden service rendezvous point, it will 20503 publish the approximate amount of rendezvous cells it has relayed 20504 the past 24 hours. The statistics themselves are obfuscated so 20505 that the exact values cannot be derived. For more details see 20506 proposal 238, "Better hidden service stats from Tor relays". This 20507 feature is currently disabled by default. Implements feature 13192. 20508 20509 o Major bugfixes (client, automap): 20510 - Repair automapping with IPv6 addresses. This automapping should 20511 have worked previously, but one piece of debugging code that we 20512 inserted to detect a regression actually caused the regression to 20513 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on 20514 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas 20515 Izquierdo Riera. 20516 20517 o Major bugfixes (hidden services): 20518 - When closing an introduction circuit that was opened in parallel 20519 with others, don't mark the introduction point as unreachable. 20520 Previously, the first successful connection to an introduction 20521 point would make the other introduction points get marked as 20522 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2. 20523 20524 o Directory authority changes: 20525 - Remove turtles as a directory authority. 20526 - Add longclaw as a new (v3) directory authority. This implements 20527 ticket 13296. This keeps the directory authority count at 9. 20528 20529 o Major removed features: 20530 - Tor clients no longer support connecting to hidden services 20531 running on Tor 0.2.2.x and earlier; the Support022HiddenServices 20532 option has been removed. (There shouldn't be any hidden services 20533 running these versions on the network.) Closes ticket 7803. 20534 20535 o Minor features (client): 20536 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks 20537 is enabled, reject requests with IP addresses as hostnames. 20538 Resolves ticket 13315. 20539 20540 o Minor features (controller): 20541 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to 20542 write an unscheduled heartbeat message to the log. Implements 20543 feature 9503. 20544 20545 o Minor features (geoip): 20546 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2 20547 Country database. 20548 20549 o Minor features (hidden services): 20550 - When re-enabling the network, don't try to build introduction 20551 circuits until we have successfully built a circuit. This makes 20552 hidden services come up faster when the network is re-enabled. 20553 Patch from "akwizgran". Closes ticket 13447. 20554 - When we fail to retrieve a hidden service descriptor, send the 20555 controller an "HS_DESC FAILED" controller event. Implements 20556 feature 13212. 20557 - New HiddenServiceDirGroupReadable option to cause hidden service 20558 directories and hostname files to be created group-readable. Patch 20559 from "anon", David Stainton, and "meejah". Closes ticket 11291. 20560 20561 o Minor features (systemd): 20562 - Where supported, when running with systemd, report successful 20563 startup to systemd. Part of ticket 11016. Patch by Michael Scherer. 20564 - When running with systemd, support systemd watchdog messages. Part 20565 of ticket 11016. Patch by Michael Scherer. 20566 20567 o Minor features (transparent proxy): 20568 - Update the transparent proxy option checks to allow for both ipfw 20569 and pf on OS X. Closes ticket 14002. 20570 - Use the correct option when using IPv6 with transparent proxy 20571 support on Linux. Resolves 13808. Patch by Francisco Blas 20572 Izquierdo Riera. 20573 20574 o Minor bugfixes (preventative security, C safety): 20575 - When reading a hexadecimal, base-32, or base-64 encoded value from 20576 a string, always overwrite the whole output buffer. This prevents 20577 some bugs where we would look at (but fortunately, not reveal) 20578 uninitialized memory on the stack. Fixes bug 14013; bugfix on all 20579 versions of Tor. 20580 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not 20581 just the part that's used. This makes it harder for data leak bugs 20582 to occur in the event of other programming failures. Resolves 20583 ticket 14041. 20584 20585 o Minor bugfixes (client, microdescriptors): 20586 - Use a full 256 bits of the SHA256 digest of a microdescriptor when 20587 computing which microdescriptors to download. This keeps us from 20588 erroneous download behavior if two microdescriptor digests ever 20589 have the same first 160 bits. Fixes part of bug 13399; bugfix 20590 on 0.2.3.1-alpha. 20591 - Reset a router's status if its microdescriptor digest changes, 20592 even if the first 160 bits remain the same. Fixes part of bug 20593 13399; bugfix on 0.2.3.1-alpha. 20594 20595 o Minor bugfixes (compilation): 20596 - Silence clang warnings under --enable-expensive-hardening, 20597 including implicit truncation of 64 bit values to 32 bit, const 20598 char assignment to self, tautological compare, and additional 20599 parentheses around equality tests. Fixes bug 13577; bugfix 20600 on 0.2.5.4-alpha. 20601 - Fix a clang warning about checking whether an address in the 20602 middle of a structure is NULL. Fixes bug 14001; bugfix 20603 on 0.2.1.2-alpha. 20604 20605 o Minor bugfixes (hidden services): 20606 - Correctly send a controller event when we find that a rendezvous 20607 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha. 20608 - Pre-check directory permissions for new hidden-services to avoid 20609 at least one case of "Bug: Acting on config options left us in a 20610 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1. 20611 - When adding a new hidden service (for example, via SETCONF), Tor 20612 no longer congratulates the user for running a relay. Fixes bug 20613 13941; bugfix on 0.2.6.1-alpha. 20614 - When fetching hidden service descriptors, we now check not only 20615 for whether we got the hidden service we had in mind, but also 20616 whether we got the particular descriptors we wanted. This prevents 20617 a class of inefficient but annoying DoS attacks by hidden service 20618 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported 20619 by "special". 20620 20621 o Minor bugfixes (Linux seccomp2 sandbox): 20622 - Make transparent proxy support work along with the seccomp2 20623 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch 20624 by Francisco Blas Izquierdo Riera. 20625 - Fix a memory leak in tor-resolve when running with the sandbox 20626 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc. 20627 20628 o Minor bugfixes (logging): 20629 - Downgrade warnings about RSA signature failures to info log level. 20630 Emit a warning when an extra info document is found incompatible 20631 with a corresponding router descriptor. Fixes bug 9812; bugfix 20632 on 0.0.6rc3. 20633 - Make connection_ap_handshake_attach_circuit() log the circuit ID 20634 correctly. Fixes bug 13701; bugfix on 0.0.6. 20635 20636 o Minor bugfixes (misc): 20637 - Stop allowing invalid address patterns like "*/24" that contain 20638 both a wildcard address and a bit prefix length. This affects all 20639 our address-range parsing code. Fixes bug 7484; bugfix 20640 on 0.0.2pre14. 20641 20642 o Minor bugfixes (testing networks, fast startup): 20643 - Allow Tor to build circuits using a consensus with no exits. If 20644 the consensus has no exits (typical of a bootstrapping test 20645 network), allow Tor to build circuits once enough descriptors have 20646 been downloaded. This assists in bootstrapping a testing Tor 20647 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch 20648 by "teor". 20649 - When V3AuthVotingInterval is low, give a lower If-Modified-Since 20650 header to directory servers. This allows us to obtain consensuses 20651 promptly when the consensus interval is very short. This assists 20652 in bootstrapping a testing Tor network. Fixes parts of bugs 13718 20653 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor". 20654 - Stop assuming that private addresses are local when checking 20655 reachability in a TestingTorNetwork. Instead, when testing, assume 20656 all OR connections are remote. (This is necessary due to many test 20657 scenarios running all relays on localhost.) This assists in 20658 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on 20659 0.1.0.1-rc. Patch by "teor". 20660 - Avoid building exit circuits from a consensus with no exits. Now 20661 thanks to our fix for 13718, we accept a no-exit network as not 20662 wholly lost, but we need to remember not to try to build exit 20663 circuits on it. Closes ticket 13814; patch by "teor". 20664 - Stop requiring exits to have non-zero bandwithcapacity in a 20665 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0, 20666 ignore exit bandwidthcapacity. This assists in bootstrapping a 20667 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix 20668 on 0.2.0.3-alpha. Patch by "teor". 20669 - Add "internal" to some bootstrap statuses when no exits are 20670 available. If the consensus does not contain Exits, Tor will only 20671 build internal circuits. In this case, relevant statuses will 20672 contain the word "internal" as indicated in the Tor control- 20673 spec.txt. When bootstrap completes, Tor will be ready to build 20674 internal circuits. If a future consensus contains Exits, exit 20675 circuits may become available. Fixes part of bug 13718; bugfix on 20676 0.2.4.10-alpha. Patch by "teor". 20677 - Decrease minimum consensus interval to 10 seconds when 20678 TestingTorNetwork is set, or 5 seconds for the first consensus. 20679 Fix assumptions throughout the code that assume larger intervals. 20680 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch 20681 by "teor". 20682 - Avoid excluding guards from path building in minimal test 20683 networks, when we're in a test network and excluding guards would 20684 exclude all relays. This typically occurs in incredibly small tor 20685 networks, and those using "TestingAuthVoteGuard *". Fixes part of 20686 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor". 20687 20688 o Code simplification and refactoring: 20689 - Stop using can_complete_circuits as a global variable; access it 20690 with a function instead. 20691 - Avoid using operators directly as macro arguments: this lets us 20692 apply coccinelle transformations to our codebase more directly. 20693 Closes ticket 13172. 20694 - Combine the functions used to parse ClientTransportPlugin and 20695 ServerTransportPlugin into a single function. Closes ticket 6456. 20696 - Add inline functions and convenience macros for inspecting channel 20697 state. Refactor the code to use convenience macros instead of 20698 checking channel state directly. Fixes issue 7356. 20699 - Document all members of was_router_added_t and rename 20700 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less 20701 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644. 20702 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL 20703 constant instead of hardcoded value. Fixes issue 13840. 20704 - Refactor our generic strmap and digestmap types into a single 20705 implementation, so that we can add a new digest256map 20706 type trivially. 20707 20708 o Documentation: 20709 - Document the bridge-authority-only 'networkstatus-bridges' file. 20710 Closes ticket 13713; patch from "tom". 20711 - Fix typo in PredictedPortsRelevanceTime option description in 20712 manpage. Resolves issue 13707. 20713 - Stop suggesting that users specify relays by nickname: it isn't a 20714 good idea. Also, properly cross-reference how to specify relays in 20715 all parts of manual documenting options that take a list of 20716 relays. Closes ticket 13381. 20717 - Clarify the HiddenServiceDir option description in manpage to make 20718 it clear that relative paths are taken with respect to the current 20719 working directory. Also clarify that this behavior is not 20720 guaranteed to remain indefinitely. Fixes issue 13913. 20721 20722 o Testing: 20723 - New tests for many parts of channel, relay, and circuitmux 20724 functionality. Code by Andrea; part of 9262. 20725 - New tests for parse_transport_line(). Part of ticket 6456. 20726 - In the unit tests, use chgrp() to change the group of the unit 20727 test temporary directory to the current user, so that the sticky 20728 bit doesn't interfere with tests that check directory groups. 20729 Closes 13678. 20730 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch 20731 by 'rl1987'. 20732 20733 20734Changes in version 0.2.6.1-alpha - 2014-10-30 20735 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It 20736 includes numerous code cleanups and new tests, and fixes a large 20737 number of annoying bugs. Out-of-memory conditions are handled better 20738 than in 0.2.5, pluggable transports have improved proxy support, and 20739 clients now use optimistic data for contacting hidden services. Also, 20740 we are now more robust to changes in what we consider a parseable 20741 directory object, so that tightening restrictions does not have a risk 20742 of introducing infinite download loops. 20743 20744 This is the first alpha release in a new series, so expect there to be 20745 bugs. Users who would rather test out a more stable branch should stay 20746 with 0.2.5.x for now. 20747 20748 o New compiler and system requirements: 20749 - Tor 0.2.6.x requires that your compiler support more of the C99 20750 language standard than before. The 'configure' script now detects 20751 whether your compiler supports C99 mid-block declarations and 20752 designated initializers. If it does not, Tor will not compile. 20753 20754 We may revisit this requirement if it turns out that a significant 20755 number of people need to build Tor with compilers that don't 20756 bother implementing a 15-year-old standard. Closes ticket 13233. 20757 - Tor no longer supports systems without threading support. When we 20758 began working on Tor, there were several systems that didn't have 20759 threads, or where the thread support wasn't able to run the 20760 threads of a single process on multiple CPUs. That no longer 20761 holds: every system where Tor needs to run well now has threading 20762 support. Resolves ticket 12439. 20763 20764 o Removed platform support: 20765 - We no longer include special code to build on Windows CE; as far 20766 as we know, nobody has used Tor on Windows CE in a very long time. 20767 Closes ticket 11446. 20768 20769 o Major features (bridges): 20770 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable 20771 transports if they are configured via the "TOR_PT_PROXY" 20772 environment variable. Implements proposal 232. Resolves 20773 ticket 8402. 20774 20775 o Major features (client performance, hidden services): 20776 - Allow clients to use optimistic data when connecting to a hidden 20777 service, which should remove a round-trip from hidden service 20778 initialization. See proposal 181 for details. Implements 20779 ticket 13211. 20780 20781 o Major features (directory system): 20782 - Upon receiving an unparseable directory object, if its digest 20783 matches what we expected, then don't try to download it again. 20784 Previously, when we got a descriptor we didn't like, we would keep 20785 trying to download it over and over. Closes ticket 11243. 20786 20787 o Major features (sample torrc): 20788 - Add a new, infrequently-changed "torrc.minimal". This file is 20789 similar to torrc.sample, but it will change as infrequently as 20790 possible, for the benefit of users whose systems prompt them for 20791 intervention whenever a default configuration file is changed. 20792 Making this change allows us to update torrc.sample to be a more 20793 generally useful "sample torrc". 20794 20795 o Major bugfixes (directory authorities): 20796 - Do not assign the HSDir flag to relays if they are not Valid, or 20797 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha. 20798 20799 o Major bugfixes (directory bandwidth performance): 20800 - Don't flush the zlib buffer aggressively when compressing 20801 directory information for clients. This should save about 7% of 20802 the bandwidth currently used for compressed descriptors and 20803 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23. 20804 20805 o Minor features (security, memory wiping): 20806 - Ensure we securely wipe keys from memory after 20807 crypto_digest_get_digest and init_curve25519_keypair_from_file 20808 have finished using them. Resolves ticket 13477. 20809 20810 o Minor features (security, out-of-memory handling): 20811 - When handling an out-of-memory condition, allocate less memory for 20812 temporary data structures. Fixes issue 10115. 20813 - When handling an out-of-memory condition, consider more types of 20814 buffers, including those on directory connections, and zlib 20815 buffers. Resolves ticket 11792. 20816 20817 o Minor features: 20818 - When identity keypair is generated for first time, log a 20819 congratulatory message that links to the new relay lifecycle 20820 document. Implements feature 10427. 20821 20822 o Minor features (client): 20823 - Clients are now willing to send optimistic data (before they 20824 receive a 'connected' cell) to relays of any version. (Relays 20825 without support for optimistic data are no longer supported on the 20826 Tor network.) Resolves ticket 13153. 20827 20828 o Minor features (directory authorities): 20829 - Don't list relays with a bandwidth estimate of 0 in the consensus. 20830 Implements a feature proposed during discussion of bug 13000. 20831 - In tor-gencert, report an error if the user provides the same 20832 argument more than once. 20833 - If a directory authority can't find a best consensus method in the 20834 votes that it holds, it now falls back to its favorite consensus 20835 method. Previously, it fell back to method 1. Neither of these is 20836 likely to get enough signatures, but "fall back to favorite" 20837 doesn't require us to maintain support an obsolete consensus 20838 method. Implements part of proposal 215. 20839 20840 o Minor features (logging): 20841 - On Unix-like systems, you can now use named pipes as the target of 20842 the Log option, and other options that try to append to files. 20843 Closes ticket 12061. Patch from "carlo von lynX". 20844 - When opening a log file at startup, send it every log message that 20845 we generated between startup and opening it. Previously, log 20846 messages that were generated before opening the log file were only 20847 logged to stdout. Closes ticket 6938. 20848 - Add a TruncateLogFile option to overwrite logs instead of 20849 appending to them. Closes ticket 5583. 20850 20851 o Minor features (portability, Solaris): 20852 - Threads are no longer disabled by default on Solaris; we believe 20853 that the versions of Solaris with broken threading support are all 20854 obsolete by now. Resolves ticket 9495. 20855 20856 o Minor features (relay): 20857 - Re-check our address after we detect a changed IP address from 20858 getsockname(). This ensures that the controller command "GETINFO 20859 address" will report the correct value. Resolves ticket 11582. 20860 Patch from "ra". 20861 - A new AccountingRule option lets Relays set whether they'd like 20862 AccountingMax to be applied separately to inbound and outbound 20863 traffic, or applied to the sum of inbound and outbound traffic. 20864 Resolves ticket 961. Patch by "chobe". 20865 20866 o Minor features (testing networks): 20867 - Add the TestingDirAuthVoteExit option, which lists nodes to assign 20868 the "Exit" flag regardless of their uptime, bandwidth, or exit 20869 policy. TestingTorNetwork must be set for this option to have any 20870 effect. Previously, authorities would take up to 35 minutes to 20871 give nodes the Exit flag in a test network. Partially implements 20872 ticket 13161. 20873 20874 o Minor features (validation): 20875 - Check all date/time values passed to tor_timegm and 20876 parse_rfc1123_time for validity, taking leap years into account. 20877 Improves HTTP header validation. Implemented with bug 13476. 20878 - In correct_tm(), limit the range of values returned by system 20879 localtime(_r) and gmtime(_r) to be between the years 1 and 8099. 20880 This means we don't have to deal with negative or too large dates, 20881 even if a clock is wrong. Otherwise we might fail to read a file 20882 written by us which includes such a date. Fixes bug 13476. 20883 20884 o Minor bugfixes (bridge clients): 20885 - When configured to use a bridge without an identity digest (not 20886 recommended), avoid launching an extra channel to it when 20887 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha. 20888 20889 o Minor bugfixes (bridges): 20890 - When DisableNetwork is set, do not launch pluggable transport 20891 plugins, and if any are running, terminate them. Fixes bug 13213; 20892 bugfix on 0.2.3.6-alpha. 20893 20894 o Minor bugfixes (C correctness): 20895 - Fix several instances of possible integer overflow/underflow/NaN. 20896 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches 20897 from "teor". 20898 - In circuit_build_times_calculate_timeout() in circuitstats.c, 20899 avoid dividing by zero in the pareto calculations. This traps 20900 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix 20901 on 0.2.2.2-alpha. 20902 - Fix an integer overflow in format_time_interval(). Fixes bug 20903 13393; bugfix on 0.2.0.10-alpha. 20904 - Set the correct day of year value when the system's localtime(_r) 20905 or gmtime(_r) functions fail to set struct tm. Not externally 20906 visible. Fixes bug 13476; bugfix on 0.0.2pre14. 20907 - Avoid unlikely signed integer overflow in tor_timegm on systems 20908 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14. 20909 20910 o Minor bugfixes (client): 20911 - Fix smartlist_choose_node_by_bandwidth() so that relays with the 20912 BadExit flag are not considered worthy candidates. Fixes bug 20913 13066; bugfix on 0.1.2.3-alpha. 20914 - Use the consensus schedule for downloading consensuses, and not 20915 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha. 20916 - Handle unsupported or malformed SOCKS5 requests properly by 20917 responding with the appropriate error message before closing the 20918 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13. 20919 20920 o Minor bugfixes (client, torrc): 20921 - Stop modifying the value of our DirReqStatistics torrc option just 20922 because we're not a bridge or relay. This bug was causing Tor 20923 Browser users to write "DirReqStatistics 0" in their torrc files 20924 as if they had chosen to change the config. Fixes bug 4244; bugfix 20925 on 0.2.3.1-alpha. 20926 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide 20927 that our options have changed every time we SIGHUP. Fixes bug 20928 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1". 20929 20930 o Minor bugfixes (controller): 20931 - Return an error when the second or later arguments of the 20932 "setevents" controller command are invalid events. Previously we 20933 would return success while silently skipping invalid events. Fixes 20934 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns". 20935 20936 o Minor bugfixes (directory system): 20937 - Always believe that v3 directory authorities serve extra-info 20938 documents, whether they advertise "caches-extra-info" or not. 20939 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha. 20940 - When running as a v3 directory authority, advertise that you serve 20941 extra-info documents so that clients who want them can find them 20942 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha. 20943 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality. 20944 Previously, directories offering BRIDGE_DIRINFO and some other 20945 flag (i.e. microdescriptors or extrainfo) would be ignored when 20946 looking for bridges. Partially fixes bug 13163; bugfix 20947 on 0.2.0.7-alpha. 20948 20949 o Minor bugfixes (networking): 20950 - Check for orconns and use connection_or_close_for_error() rather 20951 than connection_mark_for_close() directly in the getsockopt() 20952 failure case of connection_handle_write_impl(). Fixes bug 11302; 20953 bugfix on 0.2.4.4-alpha. 20954 20955 o Minor bugfixes (relay): 20956 - When generating our family list, remove spaces from around the 20957 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha. 20958 - If our previous bandwidth estimate was 0 bytes, allow publishing a 20959 new relay descriptor immediately. Fixes bug 13000; bugfix 20960 on 0.1.1.6-alpha. 20961 20962 o Minor bugfixes (testing networks): 20963 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a 20964 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha. 20965 - Stop using the default authorities in networks which provide both 20966 AlternateDirAuthority and AlternateBridgeAuthority. Partially 20967 fixes bug 13163; bugfix on 0.2.0.13-alpha. 20968 20969 o Minor bugfixes (testing): 20970 - Stop spawn test failures due to a race condition between the 20971 SIGCHLD handler updating the process status, and the test reading 20972 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha. 20973 20974 o Minor bugfixes (testing, Windows): 20975 - Avoid passing an extra backslash when creating a temporary 20976 directory for running the unit tests on Windows. Fixes bug 12392; 20977 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem. 20978 20979 o Minor bugfixes (windows): 20980 - Remove code to special-case handling of NTE_BAD_KEYSET when 20981 acquiring windows CryptoAPI context. This error can't actually 20982 occur for the parameters we're providing. Fixes bug 10816; bugfix 20983 on 0.0.2pre26. 20984 20985 o Minor bugfixes (zlib): 20986 - Avoid truncating a zlib stream when trying to finalize it with an 20987 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23. 20988 20989 o Build fixes: 20990 - Allow our configure script to build correctly with autoconf 2.62 20991 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha. 20992 - Improve the error message from ./configure to make it clear that 20993 when asciidoc has not been found, the user will have to either add 20994 --disable-asciidoc argument or install asciidoc. Resolves 20995 ticket 13228. 20996 20997 o Code simplification and refactoring: 20998 - Change the entry_is_live() function to take named bitfield 20999 elements instead of an unnamed list of booleans. Closes 21000 ticket 12202. 21001 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c. 21002 Resolves ticket 12205. 21003 - Use calloc and reallocarray functions instead of multiply- 21004 then-malloc. This makes it less likely for us to fall victim to an 21005 integer overflow attack when allocating. Resolves ticket 12855. 21006 - Use the standard macro name SIZE_MAX, instead of our 21007 own SIZE_T_MAX. 21008 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in 21009 functions which take them as arguments. Replace 0 with NO_DIRINFO 21010 in a function call for clarity. Seeks to prevent future issues 21011 like 13163. 21012 - Avoid 4 null pointer errors under clang static analysis by using 21013 tor_assert() to prove that the pointers aren't null. Fixes 21014 bug 13284. 21015 - Rework the API of policies_parse_exit_policy() to use a bitmask to 21016 represent parsing options, instead of a confusing mess of 21017 booleans. Resolves ticket 8197. 21018 - Introduce a helper function to parse ExitPolicy in 21019 or_options_t structure. 21020 21021 o Documentation: 21022 - Add a doc/TUNING document with tips for handling large numbers of 21023 TCP connections when running busy Tor relay. Update the warning 21024 message to point to this file when running out of sockets 21025 operating system is allowing to use simultaneously. Resolves 21026 ticket 9708. 21027 21028 o Removed features: 21029 - We no longer remind the user about configuration options that have 21030 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak. 21031 - Remove our old, non-weighted bandwidth-based node selection code. 21032 Previously, we used it as a fallback when we couldn't perform 21033 weighted bandwidth-based node selection. But that would only 21034 happen in the cases where we had no consensus, or when we had a 21035 consensus generated by buggy or ancient directory authorities. In 21036 either case, it's better to use the more modern, better maintained 21037 algorithm, with reasonable defaults for the weights. Closes 21038 ticket 13126. 21039 - Remove the --disable-curve25519 configure option. Relays and 21040 clients now are required to support curve25519 and the 21041 ntor handshake. 21042 - The old "StrictEntryNodes" and "StrictExitNodes" options, which 21043 used to be deprecated synonyms for "StrictNodes", are now marked 21044 obsolete. Resolves ticket 12226. 21045 - Clients don't understand the BadDirectory flag in the consensus 21046 anymore, and ignore it. 21047 21048 o Testing: 21049 - Refactor the function that chooses guard nodes so that it can more 21050 easily be tested; write some tests for it. 21051 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503; 21052 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks." 21053 - Create unit tests for format_time_interval(). With bug 13393. 21054 - Add unit tests for tor_timegm signed overflow, tor_timegm and 21055 parse_rfc1123_time validity checks, correct_tm year clamping. Unit 21056 tests (visible) fixes in bug 13476. 21057 - Add a "coverage-html" make target to generate HTML-visualized 21058 coverage results when building with --enable-coverage. (Requires 21059 lcov.) Patch from Kevin Murray. 21060 - Enable the backtrace handler (where supported) when running the 21061 unit tests. 21062 - Revise all unit tests that used the legacy test_* macros to 21063 instead use the recommended tt_* macros. This patch was generated 21064 with coccinelle, to avoid manual errors. Closes ticket 13119. 21065 21066 o Distribution (systemd): 21067 - systemd unit file: only allow tor to write to /var/lib/tor and 21068 /var/log/tor. The rest of the filesystem is accessible for reading 21069 only. Patch by intrigeri; resolves ticket 12751. 21070 - systemd unit file: ensure that the process and all its children 21071 can never gain new privileges. Patch by intrigeri; resolves 21072 ticket 12939. 21073 - systemd unit file: set up /var/run/tor as writable for the Tor 21074 service. Patch by intrigeri; resolves ticket 13196. 21075 21076 o Removed features (directory authorities): 21077 - Remove code that prevented authorities from listing Tor relays 21078 affected by CVE-2011-2769 as guards. These relays are already 21079 rejected altogether due to the minimum version requirement of 21080 0.2.3.16-alpha. Closes ticket 13152. 21081 - The "AuthDirRejectUnlisted" option no longer has any effect, as 21082 the fingerprints file (approved-routers) has been deprecated. 21083 - Directory authorities do not support being Naming dirauths anymore. 21084 The "NamingAuthoritativeDir" config option is now obsolete. 21085 - Directory authorities do not support giving out the BadDirectory 21086 flag anymore. 21087 - Directory authorities no longer advertise or support consensus 21088 methods 1 through 12 inclusive. These consensus methods were 21089 obsolete and/or insecure: maintaining the ability to support them 21090 served no good purpose. Implements part of proposal 215; closes 21091 ticket 10163. 21092 21093 o Testing (test-network.sh): 21094 - Stop using "echo -n", as some shells' built-in echo doesn't 21095 support "-n". Instead, use "/bin/echo -n". Partially fixes 21096 bug 13161. 21097 - Stop an apparent test-network hang when used with make -j2. Fixes 21098 bug 13331. 21099 - Add a --delay option to test-network.sh, which configures the 21100 delay before the chutney network tests for data transmission. 21101 Partially implements ticket 13161. 21102 21103 21104Changes in version 0.2.5.10 - 2014-10-24 21105 Tor 0.2.5.10 is the first stable release in the 0.2.5 series. 21106 21107 It adds several new security features, including improved 21108 denial-of-service resistance for relays, new compiler hardening 21109 options, and a system-call sandbox for hardened installations on Linux 21110 (requires seccomp2). The controller protocol has several new features, 21111 resolving IPv6 addresses should work better than before, and relays 21112 should be a little more CPU-efficient. We've added support for more 21113 OpenBSD and FreeBSD transparent proxy types. We've improved the build 21114 system and testing infrastructure to allow unit testing of more parts 21115 of the Tor codebase. Finally, we've addressed several nagging pluggable 21116 transport usability issues, and included numerous other small bugfixes 21117 and features mentioned below. 21118 21119 This release marks end-of-life for Tor 0.2.3.x; those Tor versions 21120 have accumulated many known flaws; everyone should upgrade. 21121 21122 o Deprecated versions: 21123 - Tor 0.2.3.x has reached end-of-life; it has received no patches or 21124 attention for some while. 21125 21126 21127Changes in version 0.2.5.9-rc - 2014-10-20 21128 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x 21129 series. It disables SSL3 in response to the recent "POODLE" attack 21130 (even though POODLE does not affect Tor). It also works around a crash 21131 bug caused by some operating systems' response to the "POODLE" attack 21132 (which does affect Tor). It also contains a few miscellaneous fixes. 21133 21134 o Major security fixes: 21135 - Disable support for SSLv3. All versions of OpenSSL in use with Tor 21136 today support TLS 1.0 or later, so we can safely turn off support 21137 for this old (and insecure) protocol. Fixes bug 13426. 21138 21139 o Major bugfixes (openssl bug workaround): 21140 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or 21141 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug 21142 13471. This is a workaround for an OpenSSL bug. 21143 21144 o Minor bugfixes: 21145 - Disable the sandbox name resolver cache when running tor-resolve: 21146 tor-resolve doesn't use the sandbox code, and turning it on was 21147 breaking attempts to do tor-resolve on a non-default server on 21148 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha. 21149 21150 o Compilation fixes: 21151 - Build and run correctly on systems like OpenBSD-current that have 21152 patched OpenSSL to remove get_cipher_by_char and/or its 21153 implementations. Fixes issue 13325. 21154 21155 o Downgraded warnings: 21156 - Downgrade the severity of the 'unexpected sendme cell from client' 21157 from 'warn' to 'protocol warning'. Closes ticket 8093. 21158 21159 21160Changes in version 0.2.4.25 - 2014-10-20 21161 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack 21162 (even though POODLE does not affect Tor). It also works around a crash 21163 bug caused by some operating systems' response to the "POODLE" attack 21164 (which does affect Tor). 21165 21166 o Major security fixes (also in 0.2.5.9-rc): 21167 - Disable support for SSLv3. All versions of OpenSSL in use with Tor 21168 today support TLS 1.0 or later, so we can safely turn off support 21169 for this old (and insecure) protocol. Fixes bug 13426. 21170 21171 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc): 21172 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or 21173 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug 21174 13471. This is a workaround for an OpenSSL bug. 21175 21176 21177Changes in version 0.2.5.8-rc - 2014-09-22 21178 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x 21179 series. It fixes a bug that affects consistency and speed when 21180 connecting to hidden services, and it updates the location of one of 21181 the directory authorities. 21182 21183 o Major bugfixes: 21184 - Clients now send the correct address for their chosen rendezvous 21185 point when trying to access a hidden service. They used to send 21186 the wrong address, which would still work some of the time because 21187 they also sent the identity digest of the rendezvous point, and if 21188 the hidden service happened to try connecting to the rendezvous 21189 point from a relay that already had a connection open to it, 21190 the relay would reuse that connection. Now connections to hidden 21191 services should be more robust and faster. Also, this bug meant 21192 that clients were leaking to the hidden service whether they were 21193 on a little-endian (common) or big-endian (rare) system, which for 21194 some users might have reduced their anonymity. Fixes bug 13151; 21195 bugfix on 0.2.1.5-alpha. 21196 21197 o Directory authority changes: 21198 - Change IP address for gabelmoo (v3 directory authority). 21199 21200 21201Changes in version 0.2.4.24 - 2014-09-22 21202 Tor 0.2.4.24 fixes a bug that affects consistency and speed when 21203 connecting to hidden services, and it updates the location of one of 21204 the directory authorities. 21205 21206 o Major bugfixes: 21207 - Clients now send the correct address for their chosen rendezvous 21208 point when trying to access a hidden service. They used to send 21209 the wrong address, which would still work some of the time because 21210 they also sent the identity digest of the rendezvous point, and if 21211 the hidden service happened to try connecting to the rendezvous 21212 point from a relay that already had a connection open to it, 21213 the relay would reuse that connection. Now connections to hidden 21214 services should be more robust and faster. Also, this bug meant 21215 that clients were leaking to the hidden service whether they were 21216 on a little-endian (common) or big-endian (rare) system, which for 21217 some users might have reduced their anonymity. Fixes bug 13151; 21218 bugfix on 0.2.1.5-alpha. 21219 21220 o Directory authority changes: 21221 - Change IP address for gabelmoo (v3 directory authority). 21222 21223 o Minor features (geoip): 21224 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2 21225 Country database. 21226 21227 21228Changes in version 0.2.5.7-rc - 2014-09-11 21229 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x 21230 release series, and some long-standing bugs related to ORPort reachability 21231 testing and failure to send CREATE cells. It is the first release 21232 candidate for the Tor 0.2.5.x series. 21233 21234 o Major bugfixes (client, startup): 21235 - Start making circuits as soon as DisabledNetwork is turned off. 21236 When Tor started with DisabledNetwork set, it would correctly 21237 conclude that it shouldn't build circuits, but it would mistakenly 21238 cache this conclusion, and continue believing it even when 21239 DisableNetwork is set to 0. Fixes the bug introduced by the fix 21240 for bug 11200; bugfix on 0.2.5.4-alpha. 21241 - Resume expanding abbreviations for command-line options. The fix 21242 for bug 4647 accidentally removed our hack from bug 586 that 21243 rewrote HashedControlPassword to __HashedControlSessionPassword 21244 when it appears on the commandline (which allowed the user to set 21245 her own HashedControlPassword in the torrc file while the 21246 controller generates a fresh session password for each run). Fixes 21247 bug 12948; bugfix on 0.2.5.1-alpha. 21248 - Warn about attempts to run hidden services and relays in the same 21249 process: that's probably not a good idea. Closes ticket 12908. 21250 21251 o Major bugfixes (relay): 21252 - Avoid queuing or sending destroy cells for circuit ID zero when we 21253 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1. 21254 Found and fixed by "cypherpunks". 21255 - Fix ORPort reachability detection on relays running behind a 21256 proxy, by correctly updating the "local" mark on the controlling 21257 channel when changing the address of an or_connection_t after the 21258 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha. 21259 21260 o Minor features (bridge): 21261 - Add an ExtORPortCookieAuthFileGroupReadable option to make the 21262 cookie file for the ExtORPort g+r by default. 21263 21264 o Minor features (geoip): 21265 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2 21266 Country database. 21267 21268 o Minor bugfixes (logging): 21269 - Reduce the log severity of the "Pluggable transport proxy does not 21270 provide any needed transports and will not be launched." message, 21271 since Tor Browser includes several ClientTransportPlugin lines in 21272 its torrc-defaults file, leading every Tor Browser user who looks 21273 at her logs to see these notices and wonder if they're dangerous. 21274 Resolves bug 13124; bugfix on 0.2.5.3-alpha. 21275 - Downgrade "Unexpected onionskin length after decryption" warning 21276 to a protocol-warn, since there's nothing relay operators can do 21277 about a client that sends them a malformed create cell. Resolves 21278 bug 12996; bugfix on 0.0.6rc1. 21279 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS 21280 cell on a cannibalized or non-OR circuit. Resolves ticket 12997. 21281 - When logging information about an EXTEND2 or EXTENDED2 cell, log 21282 their names correctly. Fixes part of bug 12700; bugfix 21283 on 0.2.4.8-alpha. 21284 - When logging information about a relay cell whose command we don't 21285 recognize, log its command as an integer. Fixes part of bug 12700; 21286 bugfix on 0.2.1.10-alpha. 21287 - Escape all strings from the directory connection before logging 21288 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor". 21289 21290 o Minor bugfixes (controller): 21291 - Restore the functionality of CookieAuthFileGroupReadable. Fixes 21292 bug 12864; bugfix on 0.2.5.1-alpha. 21293 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to 21294 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch 21295 by "teor". 21296 21297 o Minor bugfixes (compilation): 21298 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem; 21299 bugfix on 0.2.5.5-alpha. 21300 - Make the nmake make files work again. Fixes bug 13081. Bugfix on 21301 0.2.5.1-alpha. Patch from "NewEraCracker". 21302 - In routerlist_assert_ok(), don't take the address of a 21303 routerinfo's cache_info member unless that routerinfo is non-NULL. 21304 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor". 21305 - Fix a large number of false positive warnings from the clang 21306 analyzer static analysis tool. This should make real warnings 21307 easier for clang analyzer to find. Patch from "teor". Closes 21308 ticket 13036. 21309 21310 o Distribution (systemd): 21311 - Verify configuration file via ExecStartPre in the systemd unit 21312 file. Patch from intrigeri; resolves ticket 12730. 21313 - Explicitly disable RunAsDaemon in the systemd unit file. Our 21314 current systemd unit uses "Type = simple", so systemd does not 21315 expect tor to fork. If the user has "RunAsDaemon 1" in their 21316 torrc, then things won't work as expected. This is e.g. the case 21317 on Debian (and derivatives), since there we pass "--defaults-torrc 21318 /usr/share/tor/tor-service-defaults-torrc" (that contains 21319 "RunAsDaemon 1") by default. Patch by intrigeri; resolves 21320 ticket 12731. 21321 21322 o Documentation: 21323 - Adjust the URLs in the README to refer to the new locations of 21324 several documents on the website. Fixes bug 12830. Patch from 21325 Matt Pagan. 21326 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves 21327 ticket 12878. 21328 21329 21330Changes in version 0.2.5.6-alpha - 2014-07-28 21331 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the 21332 risk from guard rotation, and fixes a variety of other issues to get 21333 us closer to a release candidate. 21334 21335 o Major features (also in 0.2.4.23): 21336 - Make the number of entry guards configurable via a new 21337 NumEntryGuards consensus parameter, and the number of directory 21338 guards configurable via a new NumDirectoryGuards consensus 21339 parameter. Implements ticket 12688. 21340 21341 o Major bugfixes (also in 0.2.4.23): 21342 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna 21343 implementation that caused incorrect results on 32-bit 21344 implementations when certain malformed inputs were used along with 21345 a small class of private ntor keys. This bug does not currently 21346 appear to allow an attacker to learn private keys or impersonate a 21347 Tor server, but it could provide a means to distinguish 32-bit Tor 21348 implementations from 64-bit Tor implementations. Fixes bug 12694; 21349 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from 21350 Adam Langley. 21351 21352 o Major bugfixes: 21353 - Perform circuit cleanup operations even when circuit 21354 construction operations are disabled (because the network is 21355 disabled, or because there isn't enough directory information). 21356 Previously, when we were not building predictive circuits, we 21357 were not closing expired circuits either. Fixes bug 8387; bugfix on 21358 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we 21359 became more strict about when we have "enough directory information 21360 to build circuits". 21361 21362 o Minor features: 21363 - Authorities now assign the Guard flag to the fastest 25% of the 21364 network (it used to be the fastest 50%). Also raise the consensus 21365 weight that guarantees the Guard flag from 250 to 2000. For the 21366 current network, this results in about 1100 guards, down from 2500. 21367 This step paves the way for moving the number of entry guards 21368 down to 1 (proposal 236) while still providing reasonable expected 21369 performance for most users. Implements ticket 12690. 21370 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2 21371 Country database. 21372 - Slightly enhance the diagnostic message for bug 12184. 21373 21374 o Minor bugfixes (also in 0.2.4.23): 21375 - Warn and drop the circuit if we receive an inbound 'relay early' 21376 cell. Those used to be normal to receive on hidden service circuits 21377 due to bug 1038, but the buggy Tor versions are long gone from 21378 the network so we can afford to resume watching for them. Resolves 21379 the rest of bug 1038; bugfix on 0.2.1.19. 21380 - Correct a confusing error message when trying to extend a circuit 21381 via the control protocol but we don't know a descriptor or 21382 microdescriptor for one of the specified relays. Fixes bug 12718; 21383 bugfix on 0.2.3.1-alpha. 21384 21385 o Minor bugfixes: 21386 - Fix compilation when building with bufferevents enabled. (This 21387 configuration is still not expected to work, however.) 21388 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and 21389 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan 21390 Gunasekaran. 21391 - Compile correctly with builds and forks of OpenSSL (such as 21392 LibreSSL) that disable compression. Fixes bug 12602; bugfix on 21393 0.2.1.1-alpha. Patch from "dhill". 21394 21395 21396Changes in version 0.2.4.23 - 2014-07-28 21397 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from 21398 guard rotation, and also backports several important fixes from the 21399 Tor 0.2.5 alpha release series. 21400 21401 o Major features: 21402 - Clients now look at the "usecreatefast" consensus parameter to 21403 decide whether to use CREATE_FAST or CREATE cells for the first hop 21404 of their circuit. This approach can improve security on connections 21405 where Tor's circuit handshake is stronger than the available TLS 21406 connection security levels, but the tradeoff is more computational 21407 load on guard relays. Implements proposal 221. Resolves ticket 9386. 21408 - Make the number of entry guards configurable via a new 21409 NumEntryGuards consensus parameter, and the number of directory 21410 guards configurable via a new NumDirectoryGuards consensus 21411 parameter. Implements ticket 12688. 21412 21413 o Major bugfixes: 21414 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna 21415 implementation that caused incorrect results on 32-bit 21416 implementations when certain malformed inputs were used along with 21417 a small class of private ntor keys. This bug does not currently 21418 appear to allow an attacker to learn private keys or impersonate a 21419 Tor server, but it could provide a means to distinguish 32-bit Tor 21420 implementations from 64-bit Tor implementations. Fixes bug 12694; 21421 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from 21422 Adam Langley. 21423 21424 o Minor bugfixes: 21425 - Warn and drop the circuit if we receive an inbound 'relay early' 21426 cell. Those used to be normal to receive on hidden service circuits 21427 due to bug 1038, but the buggy Tor versions are long gone from 21428 the network so we can afford to resume watching for them. Resolves 21429 the rest of bug 1038; bugfix on 0.2.1.19. 21430 - Correct a confusing error message when trying to extend a circuit 21431 via the control protocol but we don't know a descriptor or 21432 microdescriptor for one of the specified relays. Fixes bug 12718; 21433 bugfix on 0.2.3.1-alpha. 21434 - Avoid an illegal read from stack when initializing the TLS 21435 module using a version of OpenSSL without all of the ciphers 21436 used by the v2 link handshake. Fixes bug 12227; bugfix on 21437 0.2.4.8-alpha. Found by "starlight". 21438 21439 o Minor features: 21440 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2 21441 Country database. 21442 21443 21444Changes in version 0.2.5.5-alpha - 2014-06-18 21445 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor 21446 0.2.5.x release series, including a couple of DoS issues, some 21447 performance regressions, a large number of bugs affecting the Linux 21448 seccomp2 sandbox code, and various other bugfixes. It also adds 21449 diagnostic bugfixes for a few tricky issues that we're trying to 21450 track down. 21451 21452 o Major features (security, traffic analysis resistance): 21453 - Several major improvements to the algorithm used to decide when to 21454 close TLS connections. Previous versions of Tor closed connections 21455 at a fixed interval after the last time a non-padding cell was 21456 sent over the connection, regardless of the target of the 21457 connection. Now, we randomize the intervals by adding up to 50% of 21458 their base value, we measure the length of time since connection 21459 last had at least one circuit, and we allow connections to known 21460 ORs to remain open a little longer (15 minutes instead of 3 21461 minutes minimum). These changes should improve Tor's resistance 21462 against some kinds of traffic analysis, and lower some overhead 21463 from needlessly closed connections. Fixes ticket 6799. 21464 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha. 21465 21466 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22): 21467 - Fix a memory leak that could occur if a microdescriptor parse 21468 fails during the tokenizing step. This bug could enable a memory 21469 exhaustion attack by directory servers. Fixes bug 11649; bugfix 21470 on 0.2.2.6-alpha. 21471 21472 o Major bugfixes (security, directory authorities): 21473 - Directory authorities now include a digest of each relay's 21474 identity key as a part of its microdescriptor. 21475 21476 This is a workaround for bug 11743 (reported by "cypherpunks"), 21477 where Tor clients do not support receiving multiple 21478 microdescriptors with the same SHA256 digest in the same 21479 consensus. When clients receive a consensus like this, they only 21480 use one of the relays. Without this fix, a hostile relay could 21481 selectively disable some client use of target relays by 21482 constructing a router descriptor with a different identity and the 21483 same microdescriptor parameters and getting the authorities to 21484 list it in a microdescriptor consensus. This fix prevents an 21485 attacker from causing a microdescriptor collision, because the 21486 router's identity is not forgeable. 21487 21488 o Major bugfixes (relay): 21489 - Use a direct dirport connection when uploading non-anonymous 21490 descriptors to the directory authorities. Previously, relays would 21491 incorrectly use tunnel connections under a fairly wide variety of 21492 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha. 21493 - When a circuit accidentally has the same circuit ID for its 21494 forward and reverse direction, correctly detect the direction of 21495 cells using that circuit. Previously, this bug made roughly one 21496 circuit in a million non-functional. Fixes bug 12195; this is a 21497 bugfix on every version of Tor. 21498 21499 o Major bugfixes (client, pluggable transports): 21500 - When managing pluggable transports, use OS notification facilities 21501 to learn if they have crashed, and don't attempt to kill any 21502 process that has already exited. Fixes bug 8746; bugfix 21503 on 0.2.3.6-alpha. 21504 21505 o Minor features (diagnostic): 21506 - When logging a warning because of bug 7164, additionally check the 21507 hash table for consistency (as proposed on ticket 11737). This may 21508 help diagnose bug 7164. 21509 - When we log a heartbeat, log how many one-hop circuits we have 21510 that are at least 30 minutes old, and log status information about 21511 a few of them. This is an attempt to track down bug 8387. 21512 - When encountering an unexpected CR while writing text to a file on 21513 Windows, log the name of the file. Should help diagnosing 21514 bug 11233. 21515 - Give more specific warnings when a client notices that an onion 21516 handshake has failed. Fixes ticket 9635. 21517 - Add significant new logging code to attempt to diagnose bug 12184, 21518 where relays seem to run out of available circuit IDs. 21519 - Improve the diagnostic log message for bug 8387 even further to 21520 try to improve our odds of figuring out why one-hop directory 21521 circuits sometimes do not get closed. 21522 21523 o Minor features (security, memory management): 21524 - Memory allocation tricks (mempools and buffer freelists) are now 21525 disabled by default. You can turn them back on with 21526 --enable-mempools and --enable-buf-freelists respectively. We're 21527 disabling these features because malloc performance is good enough 21528 on most platforms, and a similar feature in OpenSSL exacerbated 21529 exploitation of the Heartbleed attack. Resolves ticket 11476. 21530 21531 o Minor features (security): 21532 - Apply the secure SipHash-2-4 function to the hash table mapping 21533 circuit IDs and channels to circuits. We missed this one when we 21534 were converting all the other hash functions to use SipHash back 21535 in 0.2.5.3-alpha. Resolves ticket 11750. 21536 21537 o Minor features (build): 21538 - The configure script has a --disable-seccomp option to turn off 21539 support for libseccomp on systems that have it, in case it (or 21540 Tor's use of it) is broken. Resolves ticket 11628. 21541 21542 o Minor features (other): 21543 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2 21544 Country database. 21545 21546 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22): 21547 - When running a hidden service, do not allow TunneledDirConns 0; 21548 this will keep the hidden service from running, and also 21549 make it publish its descriptors directly over HTTP. Fixes bug 10849; 21550 bugfix on 0.2.1.1-alpha. 21551 21552 o Minor bugfixes (performance): 21553 - Avoid a bug where every successful connection made us recompute 21554 the flag telling us whether we have sufficient information to 21555 build circuits. Previously, we would forget our cached value 21556 whenever we successfully opened a channel (or marked a router as 21557 running or not running for any other reason), regardless of 21558 whether we had previously believed the router to be running. This 21559 forced us to run an expensive update operation far too often. 21560 Fixes bug 12170; bugfix on 0.1.2.1-alpha. 21561 - Avoid using tor_memeq() for checking relay cell integrity. This 21562 removes a possible performance bottleneck. Fixes part of bug 21563 12169; bugfix on 0.2.1.31. 21564 21565 o Minor bugfixes (compilation): 21566 - Fix compilation of test_status.c when building with MVSC. Bugfix 21567 on 0.2.5.4-alpha. Patch from Gisle Vanem. 21568 - Resolve GCC complaints on OpenBSD about discarding constness in 21569 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix 21570 on 0.1.1.23. Patch from Dana Koch. 21571 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to 21572 treatment of long and time_t as comparable types. Fixes part of 21573 bug 11633. Patch from Dana Koch. 21574 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug 21575 11623; bugfix on 0.2.5.3-alpha. 21576 - When deciding whether to build the 64-bit curve25519 21577 implementation, detect platforms where we can compile 128-bit 21578 arithmetic but cannot link it. Fixes bug 11729; bugfix on 21579 0.2.4.8-alpha. Patch from "conradev". 21580 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761; 21581 bugfix on 0.2.3.13-alpha. Found by "cypherpunks". 21582 - Fix compilation with dmalloc. Fixes bug 11605; bugfix 21583 on 0.2.4.10-alpha. 21584 21585 o Minor bugfixes (Directory server): 21586 - When sending a compressed set of descriptors or microdescriptors, 21587 make sure to finalize the zlib stream. Previously, we would write 21588 all the compressed data, but if the last descriptor we wanted to 21589 send was missing or too old, we would not mark the stream as 21590 finished. This caused problems for decompression tools. Fixes bug 21591 11648; bugfix on 0.1.1.23. 21592 21593 o Minor bugfixes (Linux seccomp sandbox): 21594 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug 21595 11622; bugfix on 0.2.5.1-alpha. 21596 - Avoid crashing when re-opening listener ports with the seccomp 21597 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha. 21598 - Avoid crashing with the seccomp sandbox enabled along with 21599 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha. 21600 - When we receive a SIGHUP with the sandbox enabled, correctly 21601 support rotating our log files. Fixes bug 12032; bugfix 21602 on 0.2.5.1-alpha. 21603 - Avoid crash when running with sandboxing enabled and 21604 DirReqStatistics not disabled. Fixes bug 12035; bugfix 21605 on 0.2.5.1-alpha. 21606 - Fix a "BUG" warning when trying to write bridge-stats files with 21607 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix 21608 on 0.2.5.1-alpha. 21609 - Prevent the sandbox from crashing on startup when run with the 21610 --enable-expensive-hardening configuration option. Fixes bug 21611 11477; bugfix on 0.2.5.4-alpha. 21612 - When running with DirPortFrontPage and sandboxing both enabled, 21613 reload the DirPortFrontPage correctly when restarting. Fixes bug 21614 12028; bugfix on 0.2.5.1-alpha. 21615 - Don't try to enable the sandbox when using the Tor binary to check 21616 its configuration, hash a passphrase, or so on. Doing so was 21617 crashing on startup for some users. Fixes bug 11609; bugfix 21618 on 0.2.5.1-alpha. 21619 - Avoid warnings when running with sandboxing and node statistics 21620 enabled at the same time. Fixes part of 12064; bugfix on 21621 0.2.5.1-alpha. Patch from Michael Wolf. 21622 - Avoid warnings when running with sandboxing enabled at the same 21623 time as cookie authentication, hidden services, or directory 21624 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha. 21625 - Do not allow options that require calls to exec to be enabled 21626 alongside the seccomp2 sandbox: they will inevitably crash. Fixes 21627 bug 12043; bugfix on 0.2.5.1-alpha. 21628 - Handle failures in getpwnam()/getpwuid() when running with the 21629 User option set and the Linux syscall sandbox enabled. Fixes bug 21630 11946; bugfix on 0.2.5.1-alpha. 21631 - Refactor the getaddrinfo workaround that the seccomp sandbox uses 21632 to avoid calling getaddrinfo() after installing the sandbox 21633 filters. Previously, it preloaded a cache with the IPv4 address 21634 for our hostname, and nothing else. Now, it loads the cache with 21635 every address that it used to initialize the Tor process. Fixes 21636 bug 11970; bugfix on 0.2.5.1-alpha. 21637 21638 o Minor bugfixes (pluggable transports): 21639 - Enable the ExtORPortCookieAuthFile option, to allow changing the 21640 default location of the authentication token for the extended OR 21641 Port as used by sever-side pluggable transports. We had 21642 implemented this option before, but the code to make it settable 21643 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha. 21644 - Avoid another 60-second delay when starting Tor in a pluggable- 21645 transport-using configuration when we already have cached 21646 descriptors for our bridges. Fixes bug 11965; bugfix 21647 on 0.2.3.6-alpha. 21648 21649 o Minor bugfixes (client): 21650 - Avoid "Tried to open a socket with DisableNetwork set" warnings 21651 when starting a client with bridges configured and DisableNetwork 21652 set. (Tor launcher starts Tor with DisableNetwork set the first 21653 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha. 21654 21655 o Minor bugfixes (testing): 21656 - The Python parts of the test scripts now work on Python 3 as well 21657 as Python 2, so systems where '/usr/bin/python' is Python 3 will 21658 no longer have the tests break. Fixes bug 11608; bugfix 21659 on 0.2.5.2-alpha. 21660 - When looking for versions of python that we could run the tests 21661 with, check for "python2.7" and "python3.3"; previously we were 21662 only looking for "python", "python2", and "python3". Patch from 21663 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha. 21664 - Fix all valgrind warnings produced by the unit tests. There were 21665 over a thousand memory leak warnings previously, mostly produced 21666 by forgetting to free things in the unit test code. Fixes bug 21667 11618, bugfixes on many versions of Tor. 21668 21669 o Minor bugfixes (tor-fw-helper): 21670 - Give a correct log message when tor-fw-helper fails to launch. 21671 (Previously, we would say something like "tor-fw-helper sent us a 21672 string we could not parse".) Fixes bug 9781; bugfix 21673 on 0.2.4.2-alpha. 21674 21675 o Minor bugfixes (relay, threading): 21676 - Check return code on spawn_func() in cpuworker code, so that we 21677 don't think we've spawned a nonworking cpuworker and write junk to 21678 it forever. Fix related to bug 4345; bugfix on all released Tor 21679 versions. Found by "skruffy". 21680 - Use a pthread_attr to make sure that spawn_func() cannot return an 21681 error while at the same time launching a thread. Fix related to 21682 bug 4345; bugfix on all released Tor versions. Reported 21683 by "cypherpunks". 21684 21685 o Minor bugfixes (relay, oom prevention): 21686 - Correctly detect the total available system memory. We tried to do 21687 this in 0.2.5.4-alpha, but the code was set up to always return an 21688 error value, even on success. Fixes bug 11805; bugfix 21689 on 0.2.5.4-alpha. 21690 21691 o Minor bugfixes (relay, other): 21692 - We now drop CREATE cells for already-existent circuit IDs and for 21693 zero-valued circuit IDs, regardless of other factors that might 21694 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix 21695 on 0.0.8pre1. 21696 - Avoid an illegal read from stack when initializing the TLS module 21697 using a version of OpenSSL without all of the ciphers used by the 21698 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found 21699 by "starlight". 21700 - When rejecting DATA cells for stream_id zero, still count them 21701 against the circuit's deliver window so that we don't fail to send 21702 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha. 21703 21704 o Minor bugfixes (logging): 21705 - Fix a misformatted log message about delayed directory fetches. 21706 Fixes bug 11654; bugfix on 0.2.5.3-alpha. 21707 - Squelch a spurious LD_BUG message "No origin circuit for 21708 successful SOCKS stream" in certain hidden service failure cases; 21709 fixes bug 10616. 21710 21711 o Distribution: 21712 - Include a tor.service file in contrib/dist for use with systemd. 21713 Some distributions will be able to use this file unmodified; 21714 others will need to tweak it, or write their own. Patch from Jamie 21715 Nguyen; resolves ticket 8368. 21716 21717 o Documentation: 21718 - Clean up several option names in the manpage to match their real 21719 names, add the missing documentation for a couple of testing and 21720 directory authority options, remove the documentation for a 21721 V2-directory fetching option that no longer exists. Resolves 21722 ticket 11634. 21723 - Correct the documentation so that it lists the correct directory 21724 for the stats files. (They are in a subdirectory called "stats", 21725 not "status".) 21726 - In the manpage, move more authority-only options into the 21727 directory authority section so that operators of regular directory 21728 caches don't get confused. 21729 21730 o Package cleanup: 21731 - The contrib directory has been sorted and tidied. Before, it was 21732 an unsorted dumping ground for useful and not-so-useful things. 21733 Now, it is divided based on functionality, and the items which 21734 seemed to be nonfunctional or useless have been removed. Resolves 21735 ticket 8966; based on patches from "rl1987". 21736 21737 o Removed code: 21738 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU 21739 and MTBF calculations, but that nobody was using. Fixes ticket 11742. 21740 - The TunnelDirConns and PreferTunnelledDirConns options no longer 21741 exist; tunneled directory connections have been available since 21742 0.1.2.5-alpha, and turning them off is not a good idea. This is a 21743 brute-force fix for 10849, where "TunnelDirConns 0" would break 21744 hidden services. 21745 21746 21747Changes in version 0.2.4.22 - 2014-05-16 21748 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5 21749 alpha release series. These include blocking all authority signing 21750 keys that may have been affected by the OpenSSL "heartbleed" bug, 21751 choosing a far more secure set of TLS ciphersuites by default, closing 21752 a couple of memory leaks that could be used to run a target relay out 21753 of RAM, and several others. 21754 21755 o Major features (security, backport from 0.2.5.4-alpha): 21756 - Block authority signing keys that were used on authorities 21757 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We 21758 don't have any evidence that these keys _were_ compromised; we're 21759 doing this to be prudent.) Resolves ticket 11464. 21760 21761 o Major bugfixes (security, OOM): 21762 - Fix a memory leak that could occur if a microdescriptor parse 21763 fails during the tokenizing step. This bug could enable a memory 21764 exhaustion attack by directory servers. Fixes bug 11649; bugfix 21765 on 0.2.2.6-alpha. 21766 21767 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha): 21768 - The relay ciphersuite list is now generated automatically based on 21769 uniform criteria, and includes all OpenSSL ciphersuites with 21770 acceptable strength and forward secrecy. Previously, we had left 21771 some perfectly fine ciphersuites unsupported due to omission or 21772 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by 21773 'cypherpunks'. Bugfix on 0.2.4.8-alpha. 21774 - Relays now trust themselves to have a better view than clients of 21775 which TLS ciphersuites are better than others. (Thanks to bug 21776 11513, the relay list is now well-considered, whereas the client 21777 list has been chosen mainly for anti-fingerprinting purposes.) 21778 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over 21779 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over 21780 AES128. Resolves ticket 11528. 21781 - Clients now try to advertise the same list of ciphersuites as 21782 Firefox 28. This change enables selection of (fast) GCM 21783 ciphersuites, disables some strange old ciphers, and stops 21784 advertising the ECDH (not to be confused with ECDHE) ciphersuites. 21785 Resolves ticket 11438. 21786 21787 o Minor bugfixes (configuration, security): 21788 - When running a hidden service, do not allow TunneledDirConns 0: 21789 trying to set that option together with a hidden service would 21790 otherwise prevent the hidden service from running, and also make 21791 it publish its descriptors directly over HTTP. Fixes bug 10849; 21792 bugfix on 0.2.1.1-alpha. 21793 21794 o Minor bugfixes (controller, backport from 0.2.5.4-alpha): 21795 - Avoid sending a garbage value to the controller when a circuit is 21796 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha. 21797 21798 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha): 21799 - Stop leaking memory when we successfully resolve a PTR record. 21800 Fixes bug 11437; bugfix on 0.2.4.7-alpha. 21801 21802 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha): 21803 - Avoid 60-second delays in the bootstrapping process when Tor is 21804 launching for a second time while using bridges. Fixes bug 9229; 21805 bugfix on 0.2.0.3-alpha. 21806 21807 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha): 21808 - Give the correct URL in the warning message when trying to run a 21809 relay on an ancient version of Windows. Fixes bug 9393. 21810 21811 o Minor bugfixes (compilation): 21812 - Fix a compilation error when compiling with --disable-curve25519. 21813 Fixes bug 9700; bugfix on 0.2.4.17-rc. 21814 21815 o Minor bugfixes: 21816 - Downgrade the warning severity for the the "md was still 21817 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code 21818 for trying to diagnose this bug, and the current warning in 21819 earlier versions of tor achieves nothing useful. Addresses warning 21820 from bug 7164. 21821 21822 o Minor features (log verbosity, backport from 0.2.5.4-alpha): 21823 - When we run out of usable circuit IDs on a channel, log only one 21824 warning for the whole channel, and describe how many circuits 21825 there were on the channel. Fixes part of ticket 11553. 21826 21827 o Minor features (security, backport from 0.2.5.4-alpha): 21828 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but 21829 leave the default at 8GBytes), to better support Raspberry Pi 21830 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha. 21831 21832 o Documentation (backport from 0.2.5.4-alpha): 21833 - Correctly document that we search for a system torrc file before 21834 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on 21835 0.2.3.18-rc. 21836 21837 21838Changes in version 0.2.5.4-alpha - 2014-04-25 21839 Tor 0.2.5.4-alpha includes several security and performance 21840 improvements for clients and relays, including blacklisting authority 21841 signing keys that were used while susceptible to the OpenSSL 21842 "heartbleed" bug, fixing two expensive functions on busy relays, 21843 improved TLS ciphersuite preference lists, support for run-time 21844 hardening on compilers that support AddressSanitizer, and more work on 21845 the Linux sandbox code. 21846 21847 There are also several usability fixes for clients (especially clients 21848 that use bridges), two new TransPort protocols supported (one on 21849 OpenBSD, one on FreeBSD), and various other bugfixes. 21850 21851 This release marks end-of-life for Tor 0.2.2.x; those Tor versions 21852 have accumulated many known flaws; everyone should upgrade. 21853 21854 o Major features (security): 21855 - If you don't specify MaxMemInQueues yourself, Tor now tries to 21856 pick a good value based on your total system memory. Previously, 21857 the default was always 8 GB. You can still override the default by 21858 setting MaxMemInQueues yourself. Resolves ticket 11396. 21859 - Block authority signing keys that were used on authorities 21860 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We 21861 don't have any evidence that these keys _were_ compromised; we're 21862 doing this to be prudent.) Resolves ticket 11464. 21863 21864 o Major features (relay performance): 21865 - Speed up server-side lookups of rendezvous and introduction point 21866 circuits by using hashtables instead of linear searches. These 21867 functions previously accounted between 3 and 7% of CPU usage on 21868 some busy relays. Resolves ticket 9841. 21869 - Avoid wasting CPU when extending a circuit over a channel that is 21870 nearly out of circuit IDs. Previously, we would do a linear scan 21871 over possible circuit IDs before finding one or deciding that we 21872 had exhausted our possibilities. Now, we try at most 64 random 21873 circuit IDs before deciding that we probably won't succeed. Fixes 21874 a possible root cause of ticket 11553. 21875 21876 o Major features (seccomp2 sandbox, Linux only): 21877 - The seccomp2 sandbox can now run a test network for multiple hours 21878 without crashing. The sandbox is still experimental, and more bugs 21879 will probably turn up. To try it, enable "Sandbox 1" on a Linux 21880 host. Resolves ticket 11351. 21881 - Strengthen sandbox code: the sandbox can now test the arguments 21882 for rename(), and blocks _sysctl() entirely. Resolves another part 21883 of ticket 11351. 21884 - When the sandbox blocks a system call, it now tries to log a stack 21885 trace before exiting. Resolves ticket 11465. 21886 21887 o Major bugfixes (TLS cipher selection): 21888 - The relay ciphersuite list is now generated automatically based on 21889 uniform criteria, and includes all OpenSSL ciphersuites with 21890 acceptable strength and forward secrecy. Previously, we had left 21891 some perfectly fine ciphersuites unsupported due to omission or 21892 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by 21893 'cypherpunks'. Bugfix on 0.2.4.8-alpha. 21894 - Relays now trust themselves to have a better view than clients of 21895 which TLS ciphersuites are better than others. (Thanks to bug 21896 11513, the relay list is now well-considered, whereas the client 21897 list has been chosen mainly for anti-fingerprinting purposes.) 21898 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over 21899 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over 21900 AES128. Resolves ticket 11528. 21901 - Clients now try to advertise the same list of ciphersuites as 21902 Firefox 28. This change enables selection of (fast) GCM 21903 ciphersuites, disables some strange old ciphers, and stops 21904 advertising the ECDH (not to be confused with ECDHE) ciphersuites. 21905 Resolves ticket 11438. 21906 21907 o Major bugfixes (bridge client): 21908 - Avoid 60-second delays in the bootstrapping process when Tor is 21909 launching for a second time while using bridges. Fixes bug 9229; 21910 bugfix on 0.2.0.3-alpha. 21911 21912 o Minor features (transparent proxy, *BSD): 21913 - Support FreeBSD's ipfw firewall interface for TransPort ports on 21914 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket 21915 10267; patch from "yurivict". 21916 - Support OpenBSD's divert-to rules with the pf firewall for 21917 transparent proxy ports. To enable it, set "TransProxyType 21918 pf-divert". This allows Tor to run a TransPort transparent proxy 21919 port on OpenBSD 4.4 or later without root privileges. See the 21920 pf.conf(5) manual page for information on configuring pf to use 21921 divert-to rules. Closes ticket 10896; patch from Dana Koch. 21922 21923 o Minor features (security): 21924 - New --enable-expensive-hardening option to enable security 21925 hardening options that consume nontrivial amounts of CPU and 21926 memory. Right now, this includes AddressSanitizer and UbSan, which 21927 are supported in newer versions of GCC and Clang. Closes ticket 21928 11477. 21929 21930 o Minor features (log verbosity): 21931 - Demote the message that we give when a flushing connection times 21932 out for too long from NOTICE to INFO. It was usually meaningless. 21933 Resolves ticket 5286. 21934 - Don't log so many notice-level bootstrapping messages at startup 21935 about downloading descriptors. Previously, we'd log a notice 21936 whenever we learned about more routers. Now, we only log a notice 21937 at every 5% of progress. Fixes bug 9963. 21938 - Warn less verbosely when receiving a malformed 21939 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279. 21940 - When we run out of usable circuit IDs on a channel, log only one 21941 warning for the whole channel, and describe how many circuits 21942 there were on the channel. Fixes part of ticket 11553. 21943 21944 o Minor features (relay): 21945 - If a circuit timed out for at least 3 minutes, check if we have a 21946 new external IP address, and publish a new descriptor with the new 21947 IP address if it changed. Resolves ticket 2454. 21948 21949 o Minor features (controller): 21950 - Make the entire exit policy available from the control port via 21951 GETINFO exit-policy/*. Implements enhancement 7952. Patch from 21952 "rl1987". 21953 - Because of the fix for ticket 11396, the real limit for memory 21954 usage may no longer match the configured MaxMemInQueues value. The 21955 real limit is now exposed via GETINFO limits/max-mem-in-queues. 21956 21957 o Minor features (bridge client): 21958 - Report a more useful failure message when we can't connect to a 21959 bridge because we don't have the right pluggable transport 21960 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto. 21961 21962 o Minor features (diagnostic): 21963 - Add more log messages to diagnose bug 7164, which causes 21964 intermittent "microdesc_free() called but md was still referenced" 21965 warnings. We now include more information, to figure out why we 21966 might be cleaning a microdescriptor for being too old if it's 21967 still referenced by a live node_t object. 21968 21969 o Minor bugfixes (client, DNSPort): 21970 - When using DNSPort, try to respond to AAAA requests with AAAA 21971 answers. Previously, we hadn't looked at the request type when 21972 deciding which answer type to prefer. Fixes bug 10468; bugfix on 21973 0.2.4.7-alpha. 21974 - When receiving a DNS query for an unsupported record type, reply 21975 with no answer rather than with a NOTIMPL error. This behavior 21976 isn't correct either, but it will break fewer client programs, we 21977 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch 21978 from "epoch". 21979 21980 o Minor bugfixes (exit relay): 21981 - Stop leaking memory when we successfully resolve a PTR record. 21982 Fixes bug 11437; bugfix on 0.2.4.7-alpha. 21983 21984 o Minor bugfixes (bridge client): 21985 - Stop accepting bridge lines containing hostnames. Doing so would 21986 cause clients to perform DNS requests on the hostnames, which was 21987 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha. 21988 - Avoid a 60-second delay in the bootstrapping process when a Tor 21989 client with pluggable transports re-reads its configuration at 21990 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha. 21991 21992 o Minor bugfixes (client, logging during bootstrap): 21993 - Warn only once if we start logging in an unsafe way. Previously, 21994 we complain as many times as we had problems. Fixes bug 9870; 21995 bugfix on 0.2.5.1-alpha. 21996 - Only report the first fatal bootstrap error on a given OR 21997 connection. This stops us from telling the controller bogus error 21998 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha. 21999 - Be more helpful when trying to run sandboxed on Linux without 22000 libseccomp. Instead of saying "Sandbox is not implemented on this 22001 platform", we now explain that we need to be built with 22002 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha. 22003 - Avoid generating spurious warnings when starting with 22004 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on 22005 0.2.3.9-alpha. 22006 22007 o Minor bugfixes (closing OR connections): 22008 - If write_to_buf() in connection_write_to_buf_impl_() ever fails, 22009 check if it's an or_connection_t and correctly call 22010 connection_or_close_for_error() rather than 22011 connection_mark_for_close() directly. Fixes bug 11304; bugfix on 22012 0.2.4.4-alpha. 22013 - When closing all connections on setting DisableNetwork to 1, use 22014 connection_or_close_normally() rather than closing OR connections 22015 out from under the channel layer. Fixes bug 11306; bugfix on 22016 0.2.4.4-alpha. 22017 22018 o Minor bugfixes (controller): 22019 - Avoid sending a garbage value to the controller when a circuit is 22020 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha. 22021 22022 o Minor bugfixes (tor-fw-helper): 22023 - Allow tor-fw-helper to build again by adding src/ext to its 22024 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha. 22025 22026 o Minor bugfixes (bridges): 22027 - Avoid potential crashes or bad behavior when launching a 22028 server-side managed proxy with ORPort or ExtORPort temporarily 22029 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha. 22030 22031 o Minor bugfixes (platform-specific): 22032 - Fix compilation on Solaris, which does not have <endian.h>. Fixes 22033 bug 11426; bugfix on 0.2.5.3-alpha. 22034 - When dumping a malformed directory object to disk, save it in 22035 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on 22036 0.2.2.1-alpha. 22037 - Don't report failures from make_socket_reuseable() on incoming 22038 sockets on OSX: this can happen when incoming connections close 22039 early. Fixes bug 10081. 22040 22041 o Minor bugfixes (trivial memory leaks): 22042 - Fix a small memory leak when signing a directory object. Fixes bug 22043 11275; bugfix on 0.2.4.13-alpha. 22044 - Free placeholder entries in our circuit table at exit; fixes a 22045 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha. 22046 - Don't re-initialize a second set of OpenSSL mutexes when starting 22047 up. Previously, we'd make one set of mutexes, and then immediately 22048 replace them with another. Fixes bug 11726; bugfix on 22049 0.2.5.3-alpha. 22050 - Resolve some memory leaks found by coverity in the unit tests, on 22051 exit in tor-gencert, and on a failure to compute digests for our 22052 own keys when generating a v3 networkstatus vote. These leaks 22053 should never have affected anyone in practice. 22054 22055 o Minor bugfixes (hidden service): 22056 - Only retry attempts to connect to a chosen rendezvous point 8 22057 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc. 22058 22059 o Minor bugfixes (misc code correctness): 22060 - Fix various instances of undefined behavior in channeltls.c, 22061 tor_memmem(), and eventdns.c that would cause us to construct 22062 pointers to memory outside an allocated object. (These invalid 22063 pointers were not accessed, but C does not even allow them to 22064 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha, 22065 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom". 22066 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to 22067 fix some miscellaneous errors in our tests and codebase. Fixes bug 22068 11232. Bugfixes on versions back as far as 0.2.1.11-alpha. 22069 - Always check return values for unlink, munmap, UnmapViewOfFile; 22070 check strftime return values more often. In some cases all we can 22071 do is report a warning, but this may help prevent deeper bugs from 22072 going unnoticed. Closes ticket 8787; bugfixes on many, many tor 22073 versions. 22074 - Fix numerous warnings from the clang "scan-build" static analyzer. 22075 Some of these are programming style issues; some of them are false 22076 positives that indicated awkward code; some are undefined behavior 22077 cases related to constructing (but not using) invalid pointers; 22078 some are assumptions about API behavior; some are (harmlessly) 22079 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be 22080 correct; and one or two are genuine bugs that weren't reachable 22081 from the rest of the program. Fixes bug 8793; bugfixes on many, 22082 many tor versions. 22083 22084 o Documentation: 22085 - Build the torify.1 manpage again. Previously, we were only trying 22086 to build it when also building tor-fw-helper. That's why we didn't 22087 notice that we'd broken the ability to build it. Fixes bug 11321; 22088 bugfix on 0.2.5.1-alpha. 22089 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug 22090 11061; bugfix on 0.2.4.7-alpha. 22091 - Correctly document that we search for a system torrc file before 22092 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on 22093 0.2.3.18-rc. 22094 - Resolve warnings from Doxygen. 22095 22096 o Code simplifications and refactoring: 22097 - Remove is_internal_IP() function. Resolves ticket 4645. 22098 - Remove unused function circuit_dump_by_chan from circuitlist.c. 22099 Closes issue 9107; patch from "marek". 22100 - Change our use of the ENUM_BF macro to avoid declarations that 22101 confuse Doxygen. 22102 22103 o Deprecated versions: 22104 - Tor 0.2.2.x has reached end-of-life; it has received no patches or 22105 attention for some while. Directory authorities no longer accept 22106 descriptors from relays running any version of Tor prior to Tor 22107 0.2.3.16-alpha. Resolves ticket 11149. 22108 22109 o Testing: 22110 - New macros in test.h to simplify writing mock-functions for unit 22111 tests. Part of ticket 11507. Patch from Dana Koch. 22112 - Complete tests for the status.c module. Resolves ticket 11507. 22113 Patch from Dana Koch. 22114 22115 o Removed code: 22116 - Remove all code for the long unused v1 directory protocol. 22117 Resolves ticket 11070. 22118 22119 22120Changes in version 0.2.5.3-alpha - 2014-03-22 22121 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains 22122 two new anti-DoS features for Tor relays, resolves a bug that kept 22123 SOCKS5 support for IPv6 from working, fixes several annoying usability 22124 issues for bridge users, and removes more old code for unused 22125 directory formats. 22126 22127 The Tor 0.2.5.x release series is now in patch-freeze: no feature 22128 patches not already written will be considered for inclusion in 0.2.5.x. 22129 22130 o Major features (relay security, DoS-resistance): 22131 - When deciding whether we have run out of memory and we need to 22132 close circuits, also consider memory allocated in buffers for 22133 streams attached to each circuit. 22134 22135 This change, which extends an anti-DoS feature introduced in 22136 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays 22137 better resist more memory-based DoS attacks than before. Since the 22138 MaxMemInCellQueues option now applies to all queues, it is renamed 22139 to MaxMemInQueues. This feature fixes bug 10169. 22140 - Avoid hash-flooding denial-of-service attacks by using the secure 22141 SipHash-2-4 hash function for our hashtables. Without this 22142 feature, an attacker could degrade performance of a targeted 22143 client or server by flooding their data structures with a large 22144 number of entries to be stored at the same hash table position, 22145 thereby slowing down the Tor instance. With this feature, hash 22146 table positions are derived from a randomized cryptographic key, 22147 and an attacker cannot predict which entries will collide. Closes 22148 ticket 4900. 22149 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave 22150 the default at 8GBytes), to better support Raspberry Pi users. Fixes 22151 bug 9686; bugfix on 0.2.4.14-alpha. 22152 22153 o Minor features (bridges, pluggable transports): 22154 - Bridges now write the SHA1 digest of their identity key 22155 fingerprint (that is, a hash of a hash of their public key) to 22156 notice-level logs, and to a new hashed-fingerprint file. This 22157 information will help bridge operators look up their bridge in 22158 Globe and similar tools. Resolves ticket 10884. 22159 - Improve the message that Tor displays when running as a bridge 22160 using pluggable transports without an Extended ORPort listener. 22161 Also, log the message in the log file too. Resolves ticket 11043. 22162 22163 o Minor features (other): 22164 - Add a new option, PredictedPortsRelevanceTime, to control how long 22165 after having received a request to connect to a given port Tor 22166 will try to keep circuits ready in anticipation of future requests 22167 for that port. Patch from "unixninja92"; implements ticket 9176. 22168 - Generate a warning if any ports are listed in the SocksPolicy, 22169 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or 22170 AuthDirBadExit options. (These options only support address 22171 ranges.) Fixes part of ticket 11108. 22172 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2 22173 Country database. 22174 22175 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21): 22176 - Build without warnings under clang 3.4. (We have some macros that 22177 define static functions only some of which will get used later in 22178 the module. Starting with clang 3.4, these give a warning unless the 22179 unused attribute is set on them.) Resolves ticket 10904. 22180 - Fix build warnings about missing "a2x" comment when building the 22181 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py". 22182 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch. 22183 22184 o Minor bugfixes (client): 22185 - Improve the log message when we can't connect to a hidden service 22186 because all of the hidden service directory nodes hosting its 22187 descriptor are excluded. Improves on our fix for bug 10722, which 22188 was a bugfix on 0.2.0.10-alpha. 22189 - Raise a control port warning when we fail to connect to all of 22190 our bridges. Previously, we didn't inform the controller, and 22191 the bootstrap process would stall. Fixes bug 11069; bugfix on 22192 0.2.1.2-alpha. 22193 - Exit immediately when a process-owning controller exits. 22194 Previously, tor relays would wait for a little while after their 22195 controller exited, as if they had gotten an INT signal -- but this 22196 was problematic, since there was no feedback for the user. To do a 22197 clean shutdown, controllers should send an INT signal and give Tor 22198 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta. 22199 - Stop attempting to connect to bridges before our pluggable 22200 transports are configured (harmless but resulted in some erroneous 22201 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha. 22202 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were 22203 generating incorrect SOCKS5 responses, and confusing client 22204 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha. 22205 22206 o Minor bugfixes (relays and bridges): 22207 - Avoid crashing on a malformed resolv.conf file when running a 22208 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23. 22209 - Non-exit relays no longer launch mock DNS requests to check for 22210 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when 22211 non-exit relays stopped servicing DNS requests. Fixes bug 965; 22212 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan. 22213 - Bridges now report complete directory request statistics. Related 22214 to bug 5824; bugfix on 0.2.2.1-alpha. 22215 - Bridges now never collect statistics that were designed for 22216 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha. 22217 - Stop giving annoying warning messages when we decide not to launch 22218 a pluggable transport proxy that we don't need (because there are 22219 no bridges configured to use it). Resolves ticket 5018; bugfix 22220 on 0.2.5.2-alpha. 22221 - Give the correct URL in the warning message when trying to run a 22222 relay on an ancient version of Windows. Fixes bug 9393. 22223 22224 o Minor bugfixes (backtrace support): 22225 - Support automatic backtraces on more platforms by using the 22226 "-fasynchronous-unwind-tables" compiler option. This option is 22227 needed for platforms like 32-bit Intel where "-fomit-frame-pointer" 22228 is on by default and table generation is not. This doesn't yet 22229 add Windows support; only Linux, OSX, and some BSDs are affected. 22230 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha. 22231 - Avoid strange behavior if two threads hit failed assertions at the 22232 same time and both try to log backtraces at once. (Previously, if 22233 this had happened, both threads would have stored their intermediate 22234 results in the same buffer, and generated junk outputs.) Reported by 22235 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha. 22236 - Fix a compiler warning in format_number_sigsafe(). Bugfix on 22237 0.2.5.2-alpha; patch from Nick Hopper. 22238 22239 o Minor bugfixes (unit tests): 22240 - Fix a small bug in the unit tests that might have made the tests 22241 call 'chmod' with an uninitialized bitmask. Fixes bug 10928; 22242 bugfix on 0.2.5.1-alpha. Patch from Dana Koch. 22243 22244 o Removed code: 22245 - Remove all remaining code related to version-0 hidden service 22246 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes 22247 the rest of bug 10841. 22248 22249 o Documentation: 22250 - Document in the manpage that "KBytes" may also be written as 22251 "kilobytes" or "KB", that "Kbits" may also be written as 22252 "kilobits", and so forth. Closes ticket 9222. 22253 - Document that the ClientOnly config option overrides ORPort. 22254 Our old explanation made ClientOnly sound as though it did 22255 nothing at all. Resolves bug 9059. 22256 - Explain that SocksPolicy, DirPolicy, and similar options don't 22257 take port arguments. Fixes the other part of ticket 11108. 22258 - Fix a comment about the rend_server_descriptor_t.protocols field 22259 to more accurately describe its range. Also, make that field 22260 unsigned, to more accurately reflect its usage. Fixes bug 9099; 22261 bugfix on 0.2.1.5-alpha. 22262 - Fix the manpage's description of HiddenServiceAuthorizeClient: 22263 the maximum client name length is 16, not 19. Fixes bug 11118; 22264 bugfix on 0.2.1.6-alpha. 22265 22266 o Code simplifications and refactoring: 22267 - Get rid of router->address, since in all cases it was just the 22268 string representation of router->addr. Resolves ticket 5528. 22269 22270 o Test infrastructure: 22271 - Update to the latest version of tinytest. 22272 - Improve the tinytest implementation of string operation tests so 22273 that comparisons with NULL strings no longer crash the tests; they 22274 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha. 22275 22276 22277Changes in version 0.2.4.21 - 2014-02-28 22278 Tor 0.2.4.21 further improves security against potential adversaries who 22279 find breaking 1024-bit crypto doable, and backports several stability 22280 and robustness patches from the 0.2.5 branch. 22281 22282 o Major features (client security): 22283 - When we choose a path for a 3-hop circuit, make sure it contains 22284 at least one relay that supports the NTor circuit extension 22285 handshake. Otherwise, there is a chance that we're building 22286 a circuit that's worth attacking by an adversary who finds 22287 breaking 1024-bit crypto doable, and that chance changes the game 22288 theory. Implements ticket 9777. 22289 22290 o Major bugfixes: 22291 - Do not treat streams that fail with reason 22292 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure, 22293 since it could also indicate an ENETUNREACH connection error. Fixes 22294 part of bug 10777; bugfix on 0.2.4.8-alpha. 22295 22296 o Code simplification and refactoring: 22297 - Remove data structures which were introduced to implement the 22298 CellStatistics option: they are now redundant with the new timestamp 22299 field in the regular packed_cell_t data structure, which we did 22300 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870. 22301 22302 o Minor features: 22303 - Always clear OpenSSL bignums before freeing them -- even bignums 22304 that don't contain secrets. Resolves ticket 10793. Patch by 22305 Florent Daigniere. 22306 - Build without warnings under clang 3.4. (We have some macros that 22307 define static functions only some of which will get used later in 22308 the module. Starting with clang 3.4, these give a warning unless the 22309 unused attribute is set on them.) Resolves ticket 10904. 22310 - Update geoip and geoip6 files to the February 7 2014 Maxmind 22311 GeoLite2 Country database. 22312 22313 o Minor bugfixes: 22314 - Set the listen() backlog limit to the largest actually supported 22315 on the system, not to the value in a header file. Fixes bug 9716; 22316 bugfix on every released Tor. 22317 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an 22318 exit node as a NOROUTE error, not an INTERNAL error, since they 22319 can apparently happen when trying to connect to the wrong sort 22320 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc. 22321 - Fix build warnings about missing "a2x" comment when building the 22322 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py". 22323 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch. 22324 - Avoid a segfault on SIGUSR1, where we had freed a connection but did 22325 not entirely remove it from the connection lists. Fixes bug 9602; 22326 bugfix on 0.2.4.4-alpha. 22327 - Fix a segmentation fault in our benchmark code when running with 22328 Fedora's OpenSSL package, or any other OpenSSL that provides 22329 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha. 22330 - Turn "circuit handshake stats since last time" log messages into a 22331 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc. 22332 22333 o Documentation fixes: 22334 - Document that all but one DirPort entry must have the NoAdvertise 22335 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha. 22336 22337 22338Changes in version 0.2.5.2-alpha - 2014-02-13 22339 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20, 22340 like the "poor random number generation" fix and the "building too many 22341 circuits" fix. It also further improves security against potential 22342 adversaries who find breaking 1024-bit crypto doable, and launches 22343 pluggable transports on demand (which gets us closer to integrating 22344 pluggable transport support by default -- not to be confused with Tor 22345 bundles enabling pluggable transports and bridges by default). 22346 22347 o Major features (client security): 22348 - When we choose a path for a 3-hop circuit, make sure it contains 22349 at least one relay that supports the NTor circuit extension 22350 handshake. Otherwise, there is a chance that we're building 22351 a circuit that's worth attacking by an adversary who finds 22352 breaking 1024-bit crypto doable, and that chance changes the game 22353 theory. Implements ticket 9777. 22354 - Clients now look at the "usecreatefast" consensus parameter to 22355 decide whether to use CREATE_FAST or CREATE cells for the first hop 22356 of their circuit. This approach can improve security on connections 22357 where Tor's circuit handshake is stronger than the available TLS 22358 connection security levels, but the tradeoff is more computational 22359 load on guard relays. Implements proposal 221. Resolves ticket 9386. 22360 22361 o Major features (bridges): 22362 - Don't launch pluggable transport proxies if we don't have any 22363 bridges configured that would use them. Now we can list many 22364 pluggable transports, and Tor will dynamically start one when it 22365 hears a bridge address that needs it. Resolves ticket 5018. 22366 - The bridge directory authority now assigns status flags (Stable, 22367 Guard, etc) to bridges based on thresholds calculated over all 22368 Running bridges. Now bridgedb can finally make use of its features 22369 to e.g. include at least one Stable bridge in its answers. Fixes 22370 bug 9859. 22371 22372 o Major features (other): 22373 - Extend ORCONN controller event to include an "ID" parameter, 22374 and add four new controller event types CONN_BW, CIRC_BW, 22375 CELL_STATS, and TB_EMPTY that show connection and circuit usage. 22376 The new events are emitted in private Tor networks only, with the 22377 goal of being able to better track performance and load during 22378 full-network simulations. Implements proposal 218 and ticket 7359. 22379 - On some platforms (currently: recent OSX versions, glibc-based 22380 platforms that support the ELF format, and a few other 22381 Unix-like operating systems), Tor can now dump stack traces 22382 when a crash occurs or an assertion fails. By default, traces 22383 are dumped to stderr (if possible) and to any logs that are 22384 reporting errors. Implements ticket 9299. 22385 22386 o Major bugfixes: 22387 - Avoid a segfault on SIGUSR1, where we had freed a connection but did 22388 not entirely remove it from the connection lists. Fixes bug 9602; 22389 bugfix on 0.2.4.4-alpha. 22390 - Do not treat streams that fail with reason 22391 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure, 22392 since it could also indicate an ENETUNREACH connection error. Fixes 22393 part of bug 10777; bugfix on 0.2.4.8-alpha. 22394 22395 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20): 22396 - Do not allow OpenSSL engines to replace the PRNG, even when 22397 HardwareAccel is set. The only default builtin PRNG engine uses 22398 the Intel RDRAND instruction to replace the entire PRNG, and 22399 ignores all attempts to seed it with more entropy. That's 22400 cryptographically stupid: the right response to a new alleged 22401 entropy source is never to discard all previously used entropy 22402 sources. Fixes bug 10402; works around behavior introduced in 22403 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman" 22404 and "rl1987". 22405 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6 22406 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha. 22407 - Avoid launching spurious extra circuits when a stream is pending. 22408 This fixes a bug where any circuit that _wasn't_ unusable for new 22409 streams would be treated as if it were, causing extra circuits to 22410 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha. 22411 22412 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc): 22413 - No longer stop reading or writing on cpuworker connections when 22414 our rate limiting buckets go empty. Now we should handle circuit 22415 handshake requests more promptly. Resolves bug 9731. 22416 - Stop trying to bootstrap all our directory information from 22417 only our first guard. Discovered while fixing bug 9946; bugfix 22418 on 0.2.4.8-alpha. 22419 22420 o Minor features (bridges, pluggable transports): 22421 - Add threshold cutoffs to the networkstatus document created by 22422 the Bridge Authority. Fixes bug 1117. 22423 - On Windows, spawn background processes using the CREATE_NO_WINDOW 22424 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled 22425 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x, 22426 Vidalia set this option for us.) Implements ticket 10297. 22427 22428 o Minor features (security): 22429 - Always clear OpenSSL bignums before freeing them -- even bignums 22430 that don't contain secrets. Resolves ticket 10793. Patch by 22431 Florent Daignière. 22432 22433 o Minor features (config options and command line): 22434 - Add an --allow-missing-torrc commandline option that tells Tor to 22435 run even if the configuration file specified by -f is not available. 22436 Implements ticket 10060. 22437 - Add support for the TPROXY transparent proxying facility on Linux. 22438 See documentation for the new TransProxyType option for more 22439 details. Implementation by "thomo". Closes ticket 10582. 22440 22441 o Minor features (controller): 22442 - Add a new "HS_DESC" controller event that reports activities 22443 related to hidden service descriptors. Resolves ticket 8510. 22444 - New "DROPGUARDS" controller command to forget all current entry 22445 guards. Not recommended for ordinary use, since replacing guards 22446 too frequently makes several attacks easier. Resolves ticket 9934; 22447 patch from "ra". 22448 22449 o Minor features (build): 22450 - Assume that a user using ./configure --host wants to cross-compile, 22451 and give an error if we cannot find a properly named 22452 tool-chain. Add a --disable-tool-name-check option to proceed 22453 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz. 22454 - If we run ./configure and the compiler recognizes -fstack-protector 22455 but the linker rejects it, warn the user about a potentially missing 22456 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz. 22457 22458 o Minor features (testing): 22459 - If Python is installed, "make check" now runs extra tests beyond 22460 the unit test scripts. 22461 - When bootstrapping a test network, sometimes very few relays get 22462 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can 22463 specify a set of relays which should be voted Guard regardless of 22464 their uptime or bandwidth. Addresses ticket 9206. 22465 22466 o Minor features (log messages): 22467 - When ServerTransportPlugin is set on a bridge, Tor can write more 22468 useful statistics about bridge use in its extrainfo descriptors, 22469 but only if the Extended ORPort ("ExtORPort") is set too. Add a 22470 log message to inform the user in this case. Resolves ticket 9651. 22471 - When receiving a new controller connection, log the origin address. 22472 Resolves ticket 9698; patch from "sigpipe". 22473 - When logging OpenSSL engine status at startup, log the status of 22474 more engines. Fixes ticket 10043; patch from Joshua Datko. 22475 - Turn "circuit handshake stats since last time" log messages into a 22476 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc. 22477 22478 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc): 22479 - Improve the circuit queue out-of-memory handler. Previously, when 22480 we ran low on memory, we'd close whichever circuits had the most 22481 queued cells. Now, we close those that have the *oldest* queued 22482 cells, on the theory that those are most responsible for us 22483 running low on memory. Based on analysis from a forthcoming paper 22484 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093. 22485 - Generate bootstrapping status update events correctly when fetching 22486 microdescriptors. Fixes bug 9927. 22487 - Update to the October 2 2013 Maxmind GeoLite Country database. 22488 22489 o Minor bugfixes (clients): 22490 - When closing a channel that has already been open, do not close 22491 pending circuits that were waiting to connect to the same relay. 22492 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for 22493 finding this bug. 22494 22495 o Minor bugfixes (relays): 22496 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an 22497 exit node as a NOROUTE error, not an INTERNAL error, since they 22498 can apparently happen when trying to connect to the wrong sort 22499 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc. 22500 22501 o Minor bugfixes (bridges): 22502 - Fix a bug where the first connection works to a bridge that uses a 22503 pluggable transport with client-side parameters, but we don't send 22504 the client-side parameters on subsequent connections. (We don't 22505 use any pluggable transports with client-side parameters yet, 22506 but ScrambleSuit will soon become the first one.) Fixes bug 9162; 22507 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987". 22508 22509 o Minor bugfixes (node selection): 22510 - If ExcludeNodes is set, consider non-excluded hidden service 22511 directory servers before excluded ones. Do not consider excluded 22512 hidden service directory servers at all if StrictNodes is 22513 set. (Previously, we would sometimes decide to connect to those 22514 servers, and then realize before we initiated a connection that 22515 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha. 22516 Reported by "mr-4". 22517 - If we set the ExitNodes option but it doesn't include any nodes 22518 that have the Exit flag, we would choose not to bootstrap. Now we 22519 bootstrap so long as ExitNodes includes nodes which can exit to 22520 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha. 22521 22522 o Minor bugfixes (controller and command-line): 22523 - If changing a config option via "setconf" fails in a recoverable 22524 way, we used to nonetheless write our new control ports to the 22525 file described by the "ControlPortWriteToFile" option. Now we only 22526 write out that file if we successfully switch to the new config 22527 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman". 22528 - When a command-line option such as --version or --help that 22529 ordinarily implies --hush appears on the command line along with 22530 --quiet, then actually obey --quiet. Previously, we obeyed --quiet 22531 only if it appeared later on the command line. Fixes bug 9578; 22532 bugfix on 0.2.5.1-alpha. 22533 22534 o Minor bugfixes (code correctness): 22535 - Previously we used two temporary files when writing descriptors to 22536 disk; now we only use one. Fixes bug 1376. 22537 - Remove an erroneous (but impossible and thus harmless) pointer 22538 comparison that would have allowed compilers to skip a bounds 22539 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on 22540 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield. 22541 - Fix an always-true assertion in pluggable transports code so it 22542 actually checks what it was trying to check. Fixes bug 10046; 22543 bugfix on 0.2.3.9-alpha. Found by "dcb". 22544 22545 o Minor bugfixes (protocol correctness): 22546 - When receiving a VERSIONS cell with an odd number of bytes, close 22547 the connection immediately since the cell is malformed. Fixes bug 22548 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by 22549 "rl1987". 22550 22551 o Minor bugfixes (build): 22552 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER 22553 turned off (that is, without support for v2 link handshakes). Fixes 22554 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet". 22555 - Fix compilation warnings and startup issues when running with 22556 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on 22557 0.2.5.1-alpha. 22558 - Fix compilation on Solaris 9, which didn't like us having an 22559 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha. 22560 22561 o Minor bugfixes (testing): 22562 - Fix a segmentation fault in our benchmark code when running with 22563 Fedora's OpenSSL package, or any other OpenSSL that provides 22564 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha. 22565 22566 o Minor bugfixes (log messages): 22567 - Fix a bug where clients using bridges would report themselves 22568 as 50% bootstrapped even without a live consensus document. 22569 Fixes bug 9922; bugfix on 0.2.1.1-alpha. 22570 - Suppress a warning where, if there's only one directory authority 22571 in the network, we would complain that votes and signatures cannot 22572 be uploaded to other directory authorities. Fixes bug 10842; 22573 bugfix on 0.2.2.26-beta. 22574 - Report bootstrapping progress correctly when we're downloading 22575 microdescriptors. We had updated our "do we have enough microdescs 22576 to begin building circuits?" logic most recently in 0.2.4.10-alpha 22577 (see bug 5956), but we left the bootstrap status event logic at 22578 "how far through getting 1/4 of them are we?" Fixes bug 9958; 22579 bugfix on 0.2.2.36, which is where they diverged (see bug 5343). 22580 22581 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20): 22582 - Avoid a crash bug when starting with a corrupted microdescriptor 22583 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha. 22584 - If we fail to dump a previously cached microdescriptor to disk, avoid 22585 freeing duplicate data later on. Fixes bug 10423; bugfix on 22586 0.2.4.13-alpha. Spotted by "bobnomnom". 22587 22588 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc): 22589 - Correctly log long IPv6 exit policies, instead of truncating them 22590 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha. 22591 - Our default TLS ecdhe groups were backwards: we meant to be using 22592 P224 for relays (for performance win) and P256 for bridges (since 22593 it is more common in the wild). Instead we had it backwards. After 22594 reconsideration, we decided that the default should be P256 on all 22595 hosts, since its security is probably better, and since P224 is 22596 reportedly used quite little in the wild. Found by "skruffy" on 22597 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha. 22598 - Free directory authority certificate download statuses on exit 22599 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha. 22600 22601 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc): 22602 - If the guard we choose first doesn't answer, we would try the 22603 second guard, but once we connected to the second guard we would 22604 abandon it and retry the first one, slowing down bootstrapping. 22605 The fix is to treat all our initially chosen guards as acceptable 22606 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha. 22607 - Fix an assertion failure that would occur when disabling the 22608 ORPort setting on a running Tor process while accounting was 22609 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha. 22610 - When examining the list of network interfaces to find our address, 22611 do not consider non-running or disabled network interfaces. Fixes 22612 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister". 22613 - Avoid an off-by-one error when checking buffer boundaries when 22614 formatting the exit status of a pluggable transport helper. 22615 This is probably not an exploitable bug, but better safe than 22616 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by 22617 Pedro Ribeiro. 22618 22619 o Removed code and features: 22620 - Clients now reject any directory authority certificates lacking 22621 a dir-key-crosscert element. These have been included since 22622 0.2.1.9-alpha, so there's no real reason for them to be optional 22623 any longer. Completes proposal 157. Resolves ticket 10162. 22624 - Remove all code that existed to support the v2 directory system, 22625 since there are no longer any v2 directory authorities. Resolves 22626 ticket 10758. 22627 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc 22628 options, which were used for designating authorities as "Hidden 22629 service authorities". There has been no use of hidden service 22630 authorities since 0.2.2.1-alpha, when we stopped uploading or 22631 downloading v0 hidden service descriptors. Fixes bug 10881; also 22632 part of a fix for bug 10841. 22633 22634 o Code simplification and refactoring: 22635 - Remove some old fallback code designed to keep Tor clients working 22636 in a network with only two working relays. Elsewhere in the code we 22637 have long since stopped supporting such networks, so there wasn't 22638 much point in keeping it around. Addresses ticket 9926. 22639 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536; 22640 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks". 22641 - Remove data structures which were introduced to implement the 22642 CellStatistics option: they are now redundant with the addition 22643 of a timestamp to the regular packed_cell_t data structure, which 22644 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements 22645 ticket 10870. 22646 22647 o Documentation (man page) fixes: 22648 - Update manpage to describe some of the files you can expect to 22649 find in Tor's DataDirectory. Addresses ticket 9839. 22650 - Document that all but one DirPort entry must have the NoAdvertise 22651 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha. 22652 22653 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc): 22654 - Clarify the usage and risks of setting the ContactInfo torrc line 22655 for your relay or bridge. Resolves ticket 9854. 22656 - Add anchors to the manpage so we can link to the html version of 22657 the documentation for specific options. Resolves ticket 9866. 22658 - Replace remaining references to DirServer in man page and 22659 log entries. Resolves ticket 10124. 22660 22661 o Tool changes: 22662 - Make the "tor-gencert" tool used by directory authority operators 22663 create 2048-bit signing keys by default (rather than 1024-bit, since 22664 1024-bit is uncomfortably small these days). Addresses ticket 10324. 22665 22666 22667Changes in version 0.2.4.20 - 2013-12-22 22668 Tor 0.2.4.20 fixes potentially poor random number generation for users 22669 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their 22670 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors, 22671 and 4) have no state file in their DataDirectory (as would happen on 22672 first start). Users who generated relay or hidden service identity 22673 keys in such a situation should discard them and generate new ones. 22674 22675 This release also fixes a logic error that caused Tor clients to build 22676 many more preemptive circuits than they actually need. 22677 22678 o Major bugfixes: 22679 - Do not allow OpenSSL engines to replace the PRNG, even when 22680 HardwareAccel is set. The only default builtin PRNG engine uses 22681 the Intel RDRAND instruction to replace the entire PRNG, and 22682 ignores all attempts to seed it with more entropy. That's 22683 cryptographically stupid: the right response to a new alleged 22684 entropy source is never to discard all previously used entropy 22685 sources. Fixes bug 10402; works around behavior introduced in 22686 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman" 22687 and "rl1987". 22688 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6 22689 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha. 22690 - Avoid launching spurious extra circuits when a stream is pending. 22691 This fixes a bug where any circuit that _wasn't_ unusable for new 22692 streams would be treated as if it were, causing extra circuits to 22693 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha. 22694 22695 o Minor bugfixes: 22696 - Avoid a crash bug when starting with a corrupted microdescriptor 22697 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha. 22698 - If we fail to dump a previously cached microdescriptor to disk, avoid 22699 freeing duplicate data later on. Fixes bug 10423; bugfix on 22700 0.2.4.13-alpha. Spotted by "bobnomnom". 22701 22702 22703Changes in version 0.2.4.19 - 2013-12-11 22704 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz 22705 (1986-2013). Aaron worked on diverse projects including helping to guide 22706 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing 22707 transparency to the U.S government's PACER documents, and contributing 22708 design and development for Tor and Tor2Web. Aaron was one of the latest 22709 martyrs in our collective fight for civil liberties and human rights, 22710 and his death is all the more painful because he was one of us. 22711 22712 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features 22713 a new circuit handshake and link encryption that use ECC to provide 22714 better security and efficiency; makes relays better manage circuit 22715 creation requests; uses "directory guards" to reduce client enumeration 22716 risks; makes bridges collect and report statistics about the pluggable 22717 transports they support; cleans up and improves our geoip database; 22718 gets much closer to IPv6 support for clients, bridges, and relays; makes 22719 directory authorities use measured bandwidths rather than advertised 22720 ones when computing flags and thresholds; disables client-side DNS 22721 caching to reduce tracking risks; and fixes a big bug in bridge 22722 reachability testing. This release introduces two new design 22723 abstractions in the code: a new "channel" abstraction between circuits 22724 and or_connections to allow for implementing alternate relay-to-relay 22725 transports, and a new "circuitmux" abstraction storing the queue of 22726 circuits for a channel. The release also includes many stability, 22727 security, and privacy fixes. 22728 22729 22730Changes in version 0.2.4.18-rc - 2013-11-16 22731 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x 22732 series. It takes a variety of fixes from the 0.2.5.x branch to improve 22733 stability, performance, and better handling of edge cases. 22734 22735 o Major features: 22736 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later. 22737 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or 22738 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented 22739 renegotiation from working with TLS 1.1 or 1.2, so we had disabled 22740 them to solve bug 6033.) 22741 22742 o Major bugfixes: 22743 - No longer stop reading or writing on cpuworker connections when 22744 our rate limiting buckets go empty. Now we should handle circuit 22745 handshake requests more promptly. Resolves bug 9731. 22746 - If we are unable to save a microdescriptor to the journal, do not 22747 drop it from memory and then reattempt downloading it. Fixes bug 22748 9645; bugfix on 0.2.2.6-alpha. 22749 - Stop trying to bootstrap all our directory information from 22750 only our first guard. Discovered while fixing bug 9946; bugfix 22751 on 0.2.4.8-alpha. 22752 - The new channel code sometimes lost track of in-progress circuits, 22753 causing long-running clients to stop building new circuits. The 22754 fix is to always call circuit_n_chan_done(chan, 0) from 22755 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc. 22756 22757 o Minor bugfixes (on 0.2.4.x): 22758 - Correctly log long IPv6 exit policies, instead of truncating them 22759 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha. 22760 - Our default TLS ecdhe groups were backwards: we meant to be using 22761 P224 for relays (for performance win) and P256 for bridges (since 22762 it is more common in the wild). Instead we had it backwards. After 22763 reconsideration, we decided that the default should be P256 on all 22764 hosts, since its security is probably better, and since P224 is 22765 reportedly used quite little in the wild. Found by "skruffy" on 22766 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha. 22767 - Free directory authority certificate download statuses on exit 22768 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha. 22769 22770 o Minor bugfixes (on 0.2.3.x and earlier): 22771 - If the guard we choose first doesn't answer, we would try the 22772 second guard, but once we connected to the second guard we would 22773 abandon it and retry the first one, slowing down bootstrapping. 22774 The fix is to treat all our initially chosen guards as acceptable 22775 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha. 22776 - Fix an assertion failure that would occur when disabling the 22777 ORPort setting on a running Tor process while accounting was 22778 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha. 22779 - When examining the list of network interfaces to find our address, 22780 do not consider non-running or disabled network interfaces. Fixes 22781 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister". 22782 - Avoid an off-by-one error when checking buffer boundaries when 22783 formatting the exit status of a pluggable transport helper. 22784 This is probably not an exploitable bug, but better safe than 22785 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by 22786 Pedro Ribeiro. 22787 22788 o Minor features (protecting client timestamps): 22789 - Clients no longer send timestamps in their NETINFO cells. These were 22790 not used for anything, and they provided one small way for clients 22791 to be distinguished from each other as they moved from network to 22792 network or behind NAT. Implements part of proposal 222. 22793 - Clients now round timestamps in INTRODUCE cells down to the nearest 22794 10 minutes. If a new Support022HiddenServices option is set to 0, or 22795 if it's set to "auto" and the feature is disabled in the consensus, 22796 the timestamp is sent as 0 instead. Implements part of proposal 222. 22797 - Stop sending timestamps in AUTHENTICATE cells. This is not such 22798 a big deal from a security point of view, but it achieves no actual 22799 good purpose, and isn't needed. Implements part of proposal 222. 22800 - Reduce down accuracy of timestamps in hidden service descriptors. 22801 Implements part of proposal 222. 22802 22803 o Minor features (other): 22804 - Improve the circuit queue out-of-memory handler. Previously, when 22805 we ran low on memory, we'd close whichever circuits had the most 22806 queued cells. Now, we close those that have the *oldest* queued 22807 cells, on the theory that those are most responsible for us 22808 running low on memory. Based on analysis from a forthcoming paper 22809 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093. 22810 - Generate bootstrapping status update events correctly when fetching 22811 microdescriptors. Fixes bug 9927. 22812 - Update to the October 2 2013 Maxmind GeoLite Country database. 22813 22814 o Documentation fixes: 22815 - Clarify the usage and risks of setting the ContactInfo torrc line 22816 for your relay or bridge. Resolves ticket 9854. 22817 - Add anchors to the manpage so we can link to the html version of 22818 the documentation for specific options. Resolves ticket 9866. 22819 - Replace remaining references to DirServer in man page and 22820 log entries. Resolves ticket 10124. 22821 22822 22823Changes in version 0.2.5.1-alpha - 2013-10-02 22824 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing 22825 on Linux, allows bridges that offer pluggable transports to report usage 22826 statistics, fixes many issues to make testing easier, and provides 22827 a pile of minor features and bugfixes that have been waiting for a 22828 release of the new branch. 22829 22830 This is the first alpha release in a new series, so expect there to 22831 be bugs. Users who would rather test out a more stable branch should 22832 stay with 0.2.4.x for now. 22833 22834 o Major features (security): 22835 - Use the seccomp2 syscall filtering facility on Linux to limit 22836 which system calls Tor can invoke. This is an experimental, 22837 Linux-only feature to provide defense-in-depth against unknown 22838 attacks. To try turning it on, set "Sandbox 1" in your torrc 22839 file. Please be ready to report bugs. We hope to add support 22840 for better sandboxing in the future, including more fine-grained 22841 filters, better division of responsibility, and support for more 22842 platforms. This work has been done by Cristian-Matei Toader for 22843 Google Summer of Code. 22844 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later. 22845 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or 22846 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented 22847 renegotiation from working with TLS 1.1 or 1.2, so we had disabled 22848 them to solve bug 6033.) 22849 22850 o Major features (other): 22851 - Add support for passing arguments to managed pluggable transport 22852 proxies. Implements ticket 3594. 22853 - Bridges now track GeoIP information and the number of their users 22854 even when pluggable transports are in use, and report usage 22855 statistics in their extra-info descriptors. Resolves tickets 4773 22856 and 5040. 22857 - Make testing Tor networks bootstrap better: lower directory fetch 22858 retry schedules and maximum interval without directory requests, 22859 and raise maximum download tries. Implements ticket 6752. 22860 - Add make target 'test-network' to run tests on a Chutney network. 22861 Implements ticket 8530. 22862 - The ntor handshake is now on-by-default, no matter what the 22863 directory authorities recommend. Implements ticket 8561. 22864 22865 o Major bugfixes: 22866 - Instead of writing destroy cells directly to outgoing connection 22867 buffers, queue them and intersperse them with other outgoing cells. 22868 This can prevent a set of resource starvation conditions where too 22869 many pending destroy cells prevent data cells from actually getting 22870 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912; 22871 bugfix on 0.2.0.1-alpha. 22872 - If we are unable to save a microdescriptor to the journal, do not 22873 drop it from memory and then reattempt downloading it. Fixes bug 22874 9645; bugfix on 0.2.2.6-alpha. 22875 - The new channel code sometimes lost track of in-progress circuits, 22876 causing long-running clients to stop building new circuits. The 22877 fix is to always call circuit_n_chan_done(chan, 0) from 22878 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc. 22879 22880 o Build features: 22881 - Tor now builds each source file in two modes: a mode that avoids 22882 exposing identifiers needlessly, and another mode that exposes 22883 more identifiers for testing. This lets the compiler do better at 22884 optimizing the production code, while enabling us to take more 22885 radical measures to let the unit tests test things. 22886 - The production builds no longer include functions used only in 22887 the unit tests; all functions exposed from a module only for 22888 unit-testing are now static in production builds. 22889 - Add an --enable-coverage configuration option to make the unit 22890 tests (and a new src/or/tor-cov target) to build with gcov test 22891 coverage support. 22892 22893 o Testing: 22894 - We now have rudimentary function mocking support that our unit 22895 tests can use to test functions in isolation. Function mocking 22896 lets the tests temporarily replace a function's dependencies with 22897 stub functions, so that the tests can check the function without 22898 invoking the other functions it calls. 22899 - Add more unit tests for the <circid,channel>->circuit map, and 22900 the destroy-cell-tracking code to fix bug 7912. 22901 - Unit tests for failing cases of the TAP onion handshake. 22902 - More unit tests for address-manipulation functions. 22903 22904 o Minor features (protecting client timestamps): 22905 - Clients no longer send timestamps in their NETINFO cells. These were 22906 not used for anything, and they provided one small way for clients 22907 to be distinguished from each other as they moved from network to 22908 network or behind NAT. Implements part of proposal 222. 22909 - Clients now round timestamps in INTRODUCE cells down to the nearest 22910 10 minutes. If a new Support022HiddenServices option is set to 0, or 22911 if it's set to "auto" and the feature is disabled in the consensus, 22912 the timestamp is sent as 0 instead. Implements part of proposal 222. 22913 - Stop sending timestamps in AUTHENTICATE cells. This is not such 22914 a big deal from a security point of view, but it achieves no actual 22915 good purpose, and isn't needed. Implements part of proposal 222. 22916 - Reduce down accuracy of timestamps in hidden service descriptors. 22917 Implements part of proposal 222. 22918 22919 o Minor features (config options): 22920 - Config (torrc) lines now handle fingerprints which are missing 22921 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5. 22922 - Support a --dump-config option to print some or all of the 22923 configured options. Mainly useful for debugging the command-line 22924 option parsing code. Helps resolve ticket 4647. 22925 - Raise awareness of safer logging: notify user of potentially 22926 unsafe config options, like logging more verbosely than severity 22927 "notice" or setting SafeLogging to 0. Resolves ticket 5584. 22928 - Add a new configuration option TestingV3AuthVotingStartOffset 22929 that bootstraps a network faster by changing the timing for 22930 consensus votes. Addresses ticket 8532. 22931 - Add a new torrc option "ServerTransportOptions" that allows 22932 bridge operators to pass configuration parameters to their 22933 pluggable transports. Resolves ticket 8929. 22934 - The config (torrc) file now accepts bandwidth and space limits in 22935 bits as well as bytes. (Anywhere that you can say "2 Kilobytes", 22936 you can now say "16 kilobits", and so on.) Resolves ticket 9214. 22937 Patch by CharlieB. 22938 22939 o Minor features (build): 22940 - Add support for `--library-versions` flag. Implements ticket 6384. 22941 - Return the "unexpected sendme" warnings to a warn severity, but make 22942 them rate limited, to help diagnose ticket 8093. 22943 - Detect a missing asciidoc, and warn the user about it, during 22944 configure rather than at build time. Fixes issue 6506. Patch from 22945 Arlo Breault. 22946 22947 o Minor features (other): 22948 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking 22949 sockets in a single system call. Implements ticket 5129. 22950 - Log current accounting state (bytes sent and received + remaining 22951 time for the current accounting period) in the relay's heartbeat 22952 message. Implements ticket 5526; patch from Peter Retzlaff. 22953 - Implement the TRANSPORT_LAUNCHED control port event that 22954 notifies controllers about new launched pluggable 22955 transports. Resolves ticket 5609. 22956 - If we're using the pure-C 32-bit curve25519_donna implementation 22957 of curve25519, build it with the -fomit-frame-pointer option to 22958 make it go faster on register-starved hosts. This improves our 22959 handshake performance by about 6% on i386 hosts without nacl. 22960 Closes ticket 8109. 22961 - Update to the September 4 2013 Maxmind GeoLite Country database. 22962 22963 o Minor bugfixes: 22964 - Set the listen() backlog limit to the largest actually supported 22965 on the system, not to the value in a header file. Fixes bug 9716; 22966 bugfix on every released Tor. 22967 - No longer accept malformed http headers when parsing urls from 22968 headers. Now we reply with Bad Request ("400"). Fixes bug 2767; 22969 bugfix on 0.0.6pre1. 22970 - In munge_extrainfo_into_routerinfo(), check the return value of 22971 memchr(). This would have been a serious issue if we ever passed 22972 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch 22973 from Arlo Breault. 22974 - On the chance that somebody manages to build Tor on a 22975 platform where time_t is unsigned, correct the way that 22976 microdesc_add_to_cache() handles negative time arguments. 22977 Fixes bug 8042; bugfix on 0.2.3.1-alpha. 22978 - Reject relative control socket paths and emit a warning. Previously, 22979 single-component control socket paths would be rejected, but Tor 22980 would not log why it could not validate the config. Fixes bug 9258; 22981 bugfix on 0.2.3.16-alpha. 22982 22983 o Minor bugfixes (command line): 22984 - Use a single command-line parser for parsing torrc options on the 22985 command line and for finding special command-line options to avoid 22986 inconsistent behavior for torrc option arguments that have the same 22987 names as command-line options. Fixes bugs 4647 and 9578; bugfix on 22988 0.0.9pre5. 22989 - No longer allow 'tor --hash-password' with no arguments. Fixes bug 22990 9573; bugfix on 0.0.9pre5. 22991 22992 o Minor fixes (build, auxiliary programs): 22993 - Stop preprocessing the "torify" script with autoconf, since 22994 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch 22995 from Guilhem. 22996 - The tor-fw-helper program now follows the standard convention and 22997 exits with status code "0" on success. Fixes bug 9030; bugfix on 22998 0.2.3.1-alpha. Patch by Arlo Breault. 22999 - Corrected ./configure advice for what openssl dev package you should 23000 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha. 23001 23002 o Minor code improvements: 23003 - Remove constants and tests for PKCS1 padding; it's insecure and 23004 shouldn't be used for anything new. Fixes bug 8792; patch 23005 from Arlo Breault. 23006 - Remove instances of strcpy() from the unit tests. They weren't 23007 hurting anything, since they were only in the unit tests, but it's 23008 embarrassing to have strcpy() in the code at all, and some analysis 23009 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and 23010 0.2.3.8-alpha. Patch from Arlo Breault. 23011 23012 o Removed features: 23013 - Remove migration code from when we renamed the "cached-routers" 23014 file to "cached-descriptors" back in 0.2.0.8-alpha. This 23015 incidentally resolves ticket 6502 by cleaning up the related code 23016 a bit. Patch from Akshay Hebbar. 23017 23018 o Code simplification and refactoring: 23019 - Extract the common duplicated code for creating a subdirectory 23020 of the data directory and writing to a file in it. Fixes ticket 23021 4282; patch from Peter Retzlaff. 23022 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output 23023 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(), 23024 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170. 23025 - Add a set of accessor functions for the circuit timeout data 23026 structure. Fixes ticket 6153; patch from "piet". 23027 - Clean up exit paths from connection_listener_new(). Closes ticket 23028 8789. Patch from Arlo Breault. 23029 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp() 23030 and drop our own custom pkey_eq() implementation. Fixes bug 9043. 23031 - Use a doubly-linked list to implement the global circuit list. 23032 Resolves ticket 9108. Patch from Marek Majkowski. 23033 - Remove contrib/id_to_fp.c since it wasn't used anywhere. 23034 23035 23036Changes in version 0.2.4.17-rc - 2013-09-05 23037 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x 23038 series. It adds an emergency step to help us tolerate the massive 23039 influx of users: 0.2.4 clients using the new (faster and safer) "NTor" 23040 circuit-level handshakes now effectively jump the queue compared to 23041 the 0.2.3 clients using "TAP" handshakes. This release also fixes a 23042 big bug hindering bridge reachability tests. 23043 23044 o Major features: 23045 - Relays now process the new "NTor" circuit-level handshake requests 23046 with higher priority than the old "TAP" circuit-level handshake 23047 requests. We still process some TAP requests to not totally starve 23048 0.2.3 clients when NTor becomes popular. A new consensus parameter 23049 "NumNTorsPerTAP" lets us tune the balance later if we need to. 23050 Implements ticket 9574. 23051 23052 o Major bugfixes: 23053 - If the circuit build timeout logic is disabled (via the consensus, 23054 or because we are an authority), then don't build testing circuits. 23055 Fixes bug 9657; bugfix on 0.2.2.14-alpha. 23056 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes; 23057 previously they did not, which prevented them from receiving 23058 successful connections from relays for self-test or bandwidth 23059 testing. Also, when a relay is extending a circuit to a bridge, 23060 it needs to send a NETINFO cell, even when the bridge hasn't sent 23061 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha. 23062 - If the time to download the next old-style networkstatus is in 23063 the future, do not decline to consider whether to download the 23064 next microdescriptor networkstatus. Fixes bug 9564; bugfix on 23065 0.2.3.14-alpha. 23066 23067 o Minor bugfixes: 23068 - Avoid double-closing the listener socket in our socketpair() 23069 replacement (used on Windows) in the case where the addresses on 23070 our opened sockets don't match what we expected. Fixes bug 9400; 23071 bugfix on 0.0.2pre7. Found by Coverity. 23072 23073 o Minor fixes (config options): 23074 - Avoid overflows when the user sets MaxCircuitDirtiness to a 23075 ridiculously high value, by imposing a (ridiculously high) 30-day 23076 maximum on MaxCircuitDirtiness. 23077 - Fix the documentation of HeartbeatPeriod to say that the heartbeat 23078 message is logged at notice, not at info. 23079 - Warn and fail if a server is configured not to advertise any 23080 ORPorts at all. (We need *something* to put in our descriptor, 23081 or we just won't work.) 23082 23083 o Minor features: 23084 - Track how many "TAP" and "NTor" circuit handshake requests we get, 23085 and how many we complete, and log it every hour to help relay 23086 operators follow trends in network load. Addresses ticket 9658. 23087 - Update to the August 7 2013 Maxmind GeoLite Country database. 23088 23089 23090Changes in version 0.2.4.16-rc - 2013-08-10 23091 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x 23092 series. It fixes several crash bugs in the 0.2.4 branch. 23093 23094 o Major bugfixes: 23095 - Fix a bug in the voting algorithm that could yield incorrect results 23096 when a non-naming authority declared too many flags. Fixes bug 9200; 23097 bugfix on 0.2.0.3-alpha. 23098 - Fix an uninitialized read that could in some cases lead to a remote 23099 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha. 23100 Anybody running a hidden service on the experimental 0.2.4.x 23101 branch should upgrade. (This is, so far as we know, unrelated to 23102 the recent news.) 23103 - Avoid an assertion failure when processing DNS replies without the 23104 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha. 23105 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on 23106 0.2.4.15-rc. Found by stem integration tests. 23107 23108 o Minor bugfixes: 23109 - Fix an invalid memory read that occurred when a pluggable 23110 transport proxy failed its configuration protocol. 23111 Fixes bug 9288; bugfix on 0.2.4.1-alpha. 23112 - When evaluating whether to use a connection that we haven't 23113 decided is canonical using a recent link protocol version, 23114 decide that it's canonical only if it used address _does_ 23115 match the desired address. Fixes bug 9309; bugfix on 23116 0.2.4.4-alpha. Reported by skruffy. 23117 - Make the default behavior of NumDirectoryGuards be to track 23118 NumEntryGuards. Now a user who changes only NumEntryGuards will get 23119 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha. 23120 - Fix a spurious compilation warning with some older versions of 23121 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha. 23122 23123 o Minor features: 23124 - Update to the July 3 2013 Maxmind GeoLite Country database. 23125 23126 23127Changes in version 0.2.4.15-rc - 2013-07-01 23128 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x 23129 series. It fixes a few smaller bugs, but generally appears stable. 23130 Please test it and let us know whether it is! 23131 23132 o Major bugfixes: 23133 - When receiving a new configuration file via the control port's 23134 LOADCONF command, do not treat the defaults file as absent. 23135 Fixes bug 9122; bugfix on 0.2.3.9-alpha. 23136 23137 o Minor features: 23138 - Issue a warning when running with the bufferevents backend enabled. 23139 It's still not stable, and people should know that they're likely 23140 to hit unexpected problems. Closes ticket 9147. 23141 23142 23143Changes in version 0.2.4.14-alpha - 2013-06-18 23144 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems 23145 present in 0.2.4.13-alpha. 23146 23147 o Major bugfixes: 23148 - When we have too much memory queued in circuits (according to a new 23149 MaxMemInCellQueues option), close the circuits consuming the most 23150 memory. This prevents us from running out of memory as a relay if 23151 circuits fill up faster than they can be drained. Fixes bug 9063; 23152 bugfix on the 54th commit of Tor. This bug is a further fix beyond 23153 bug 6252, whose fix was merged into 0.2.3.21-rc. 23154 23155 This change also fixes an earlier approach taken in 0.2.4.13-alpha, 23156 where we tried to solve this issue simply by imposing an upper limit 23157 on the number of queued cells for a single circuit. That approach 23158 proved to be problematic, since there are ways to provoke clients to 23159 send a number of cells in excess of any such reasonable limit. Fixes 23160 bug 9072; bugfix on 0.2.4.13-alpha. 23161 23162 - Limit hidden service descriptors to at most ten introduction 23163 points, to slow one kind of guard enumeration. Fixes bug 9002; 23164 bugfix on 0.1.1.11-alpha. 23165 23166 23167Changes in version 0.2.4.13-alpha - 2013-06-14 23168 Tor 0.2.4.13-alpha fixes a variety of potential remote crash 23169 vulnerabilities, makes socks5 username/password circuit isolation 23170 actually actually work (this time for sure!), and cleans up a bunch 23171 of other issues in preparation for a release candidate. 23172 23173 o Major bugfixes (robustness): 23174 - Close any circuit that has too many cells queued on it. Fixes 23175 bug 9063; bugfix on the 54th commit of Tor. This bug is a further 23176 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc. 23177 - Prevent the get_freelists() function from running off the end of 23178 the list of freelists if it somehow gets an unrecognized 23179 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by 23180 eugenis. 23181 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs) 23182 when an exit connection with optimistic data succeeds immediately 23183 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on 23184 0.2.3.1-alpha. 23185 - Fix a directory authority crash bug when building a consensus 23186 using an older consensus as its basis. Fixes bug 8833. Bugfix 23187 on 0.2.4.12-alpha. 23188 23189 o Major bugfixes: 23190 - Avoid a memory leak where we would leak a consensus body when we 23191 find that a consensus which we couldn't previously verify due to 23192 missing certificates is now verifiable. Fixes bug 8719; bugfix 23193 on 0.2.0.10-alpha. 23194 - We used to always request authority certificates by identity digest, 23195 meaning we'd get the newest one even when we wanted one with a 23196 different signing key. Then we would complain about being given 23197 a certificate we already had, and never get the one we really 23198 wanted. Now we use the "fp-sk/" resource as well as the "fp/" 23199 resource to request the one we want. Fixes bug 5595; bugfix on 23200 0.2.0.8-alpha. 23201 - Follow the socks5 protocol when offering username/password 23202 authentication. The fix for bug 8117 exposed this bug, and it 23203 turns out real-world applications like Pidgin do care. Bugfix on 23204 0.2.3.2-alpha; fixes bug 8879. 23205 - Prevent failures on Windows Vista and later when rebuilding the 23206 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822; 23207 bugfix on 0.2.4.12-alpha. 23208 23209 o Minor bugfixes: 23210 - Fix an impossible buffer overrun in the AES unit tests. Fixes 23211 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis. 23212 - If for some reason we fail to write a microdescriptor while 23213 rebuilding the cache, do not let the annotations from that 23214 microdescriptor linger in the cache file, and do not let the 23215 microdescriptor stay recorded as present in its old location. 23216 Fixes bug 9047; bugfix on 0.2.2.6-alpha. 23217 - Fix a memory leak that would occur whenever a configuration 23218 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha. 23219 - Paste the description for PathBias parameters from the man 23220 page into or.h, so the code documents them too. Fixes bug 7982; 23221 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha. 23222 - Relays now treat a changed IPv6 ORPort as sufficient reason to 23223 publish an updated descriptor. Fixes bug 6026; bugfix on 23224 0.2.4.1-alpha. 23225 - When launching a resolve request on behalf of an AF_UNIX control 23226 socket, omit the address field of the new entry connection, used in 23227 subsequent controller events, rather than letting tor_dup_addr() 23228 set it to "<unknown address type>". Fixes bug 8639; bugfix on 23229 0.2.4.12-alpha. 23230 23231 o Minor bugfixes (log messages): 23232 - Fix a scaling issue in the path bias accounting code that 23233 resulted in "Bug:" log messages from either 23234 pathbias_scale_close_rates() or pathbias_count_build_success(). 23235 This represents a bugfix on a previous bugfix: the original fix 23236 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix 23237 on 0.2.4.1-alpha. 23238 - Give a less useless error message when the user asks for an IPv4 23239 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix 23240 on 0.2.4.7-alpha. 23241 23242 o Minor features: 23243 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x, 23244 to tolerate bug 8093 for now. 23245 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines 23246 in directory authority votes to describe whether they have enough 23247 measured bandwidths to ignore advertised (relay descriptor) 23248 bandwidth claims. Resolves ticket 8711. 23249 - Update to the June 5 2013 Maxmind GeoLite Country database. 23250 23251 o Removed documentation: 23252 - Remove some of the older contents of doc/ as obsolete; move others 23253 to torspec.git. Fixes bug 8965. 23254 23255 o Code simplification and refactoring: 23256 - Avoid using character buffers when constructing most directory 23257 objects: this approach was unwieldy and error-prone. Instead, 23258 build smartlists of strings, and concatenate them when done. 23259 23260 23261Changes in version 0.2.4.12-alpha - 2013-04-18 23262 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the 23263 process for lengthening the guard rotation period, makes directory 23264 authority opinions in the consensus a bit less gameable, makes socks5 23265 username/password circuit isolation actually work, and fixes a wide 23266 variety of other issues. 23267 23268 o Major features: 23269 - Raise the default time that a client keeps an entry guard from 23270 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES 23271 2012 paper. (We would make it even longer, but we need better client 23272 load balancing first.) Also, make the guard lifetime controllable 23273 via a new GuardLifetime torrc option and a GuardLifetime consensus 23274 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha. 23275 - Directory authorities now prefer using measured bandwidths to 23276 advertised ones when computing flags and thresholds. Resolves 23277 ticket 8273. 23278 - Directory authorities that have more than a threshold number 23279 of relays with measured bandwidths now treat relays with unmeasured 23280 bandwidths as having bandwidth 0. Resolves ticket 8435. 23281 23282 o Major bugfixes (assert / resource use): 23283 - Avoid a bug where our response to TLS renegotiation under certain 23284 network conditions could lead to a busy-loop, with 100% CPU 23285 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha. 23286 - Avoid an assertion when we discover that we'd like to write a cell 23287 onto a closing connection: just discard the cell. Fixes another 23288 case of bug 7350; bugfix on 0.2.4.4-alpha. 23289 23290 o Major bugfixes (client-side privacy): 23291 - When we mark a circuit as unusable for new circuits, have it 23292 continue to be unusable for new circuits even if MaxCircuitDirtiness 23293 is increased too much at the wrong time, or the system clock jumps 23294 backwards. Fixes bug 6174; bugfix on 0.0.2pre26. 23295 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries 23296 which have resolved to internal addresses") is set, apply that 23297 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha. 23298 - When an exit relay rejects a stream with reason "exit policy", but 23299 we only know an exit policy summary (e.g. from the microdesc 23300 consensus) for it, do not mark the relay as useless for all exiting. 23301 Instead, mark just the circuit as unsuitable for that particular 23302 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha. 23303 - Allow applications to get proper stream isolation with 23304 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer 23305 username/password authentication also offer "no authentication". Tor 23306 had previously preferred "no authentication", so the applications 23307 never actually sent Tor their auth details. Now Tor selects 23308 username/password authentication if it's offered. You can disable 23309 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes 23310 bug 8117; bugfix on 0.2.3.3-alpha. 23311 23312 o Major bugfixes (other): 23313 - When unable to find any working directory nodes to use as a 23314 directory guard, give up rather than adding the same non-working 23315 nodes to the directory guard list over and over. Fixes bug 8231; 23316 bugfix on 0.2.4.8-alpha. 23317 23318 o Minor features: 23319 - Reject as invalid most directory objects containing a NUL. 23320 Belt-and-suspender fix for bug 8037. 23321 - In our testsuite, create temporary directories with a bit more 23322 entropy in their name to make name collisions less likely. Fixes 23323 bug 8638. 23324 - Add CACHED keyword to ADDRMAP events in the control protocol 23325 to indicate whether a DNS result will be cached or not. Resolves 23326 ticket 8596. 23327 - Update to the April 3 2013 Maxmind GeoLite Country database. 23328 23329 o Minor features (build): 23330 - Detect and reject attempts to build Tor with threading support 23331 when OpenSSL has been compiled without threading support. 23332 Fixes bug 6673. 23333 - Clarify that when autoconf is checking for nacl, it is checking 23334 specifically for nacl with a fast curve25519 implementation. 23335 Fixes bug 8014. 23336 - Warn if building on a platform with an unsigned time_t: there 23337 are too many places where Tor currently assumes that time_t can 23338 hold negative values. We'd like to fix them all, but probably 23339 some will remain. 23340 23341 o Minor bugfixes (build): 23342 - Fix some bugs in tor-fw-helper-natpmp when trying to build and 23343 run it on Windows. More bugs likely remain. Patch from Gisle Vanem. 23344 Fixes bug 7280; bugfix on 0.2.3.1-alpha. 23345 - Add the old src/or/micro-revision.i filename to CLEANFILES. 23346 On the off chance that somebody has one, it will go away as soon 23347 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha. 23348 - Build Tor correctly on 32-bit platforms where the compiler can build 23349 but not run code using the "uint128_t" construction. Fixes bug 8587; 23350 bugfix on 0.2.4.8-alpha. 23351 - Fix compilation warning with some versions of clang that would 23352 prefer the -Wswitch-enum compiler flag to warn about switch 23353 statements with missing enum values, even if those switch 23354 statements have a "default:" statement. Fixes bug 8598; bugfix 23355 on 0.2.4.10-alpha. 23356 23357 o Minor bugfixes (protocol): 23358 - Fix the handling of a TRUNCATE cell when it arrives while the 23359 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1. 23360 - Fix a misframing issue when reading the version numbers in a 23361 VERSIONS cell. Previously we would recognize [00 01 00 02] as 23362 'version 1, version 2, and version 0x100', when it should have 23363 only included versions 1 and 2. Fixes bug 8059; bugfix on 23364 0.2.0.10-alpha. Reported pseudonymously. 23365 - Make the format and order of STREAM events for DNS lookups 23366 consistent among the various ways to launch DNS lookups. Fixes 23367 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy". 23368 - Correct our check for which versions of Tor support the EXTEND2 23369 cell. We had been willing to send it to Tor 0.2.4.7-alpha and 23370 later, when support was really added in version 0.2.4.8-alpha. 23371 Fixes bug 8464; bugfix on 0.2.4.8-alpha. 23372 23373 o Minor bugfixes (other): 23374 - Correctly store microdescriptors and extrainfo descriptors with 23375 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha. 23376 Bug reported by "cypherpunks". 23377 - Increase the width of the field used to remember a connection's 23378 link protocol version to two bytes. Harmless for now, since the 23379 only currently recognized versions are one byte long. Reported 23380 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha. 23381 - If the state file's path bias counts are invalid (presumably from a 23382 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add 23383 additional checks and log messages to the scaling of Path Bias 23384 counts, in case there still are remaining issues with scaling. 23385 Should help resolve bug 8235. 23386 - Eliminate several instances where we use "Nickname=ID" to refer to 23387 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use 23388 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix 23389 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha. 23390 23391 o Minor bugfixes (syscalls): 23392 - Always check the return values of functions fcntl() and 23393 setsockopt(). We don't believe these are ever actually failing in 23394 practice, but better safe than sorry. Also, checking these return 23395 values should please analysis tools like Coverity. Patch from 23396 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor. 23397 - Use direct writes rather than stdio when building microdescriptor 23398 caches, in an attempt to mitigate bug 8031, or at least make it 23399 less common. 23400 23401 o Minor bugfixes (config): 23402 - When rejecting a configuration because we were unable to parse a 23403 quoted string, log an actual error message. Fixes bug 7950; bugfix 23404 on 0.2.0.16-alpha. 23405 - Behave correctly when the user disables LearnCircuitBuildTimeout 23406 but doesn't tell us what they would like the timeout to be. Fixes 23407 bug 6304; bugfix on 0.2.2.14-alpha. 23408 - When autodetecting the number of CPUs, use the number of available 23409 CPUs in preference to the number of configured CPUs. Inform the 23410 user if this reduces the number of available CPUs. Fixes bug 8002; 23411 bugfix on 0.2.3.1-alpha. 23412 - Make it an error when you set EntryNodes but disable UseGuardNodes, 23413 since it will (surprisingly to some users) ignore EntryNodes. Fixes 23414 bug 8180; bugfix on 0.2.3.11-alpha. 23415 - Allow TestingTorNetworks to override the 4096-byte minimum for 23416 the Fast threshold. Otherwise they can't bootstrap until they've 23417 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha. 23418 - Fix some logic errors when the user manually overrides the 23419 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix 23420 on 0.2.4.10-alpha. 23421 23422 o Minor bugfixes (log messages to help diagnose bugs): 23423 - If we fail to free a microdescriptor because of bug 7164, log 23424 the filename and line number from which we tried to free it. 23425 - Add another diagnostic to the heartbeat message: track and log 23426 overhead that TLS is adding to the data we write. If this is 23427 high, we are sending too little data to SSL_write at a time. 23428 Diagnostic for bug 7707. 23429 - Add more detail to a log message about relaxed timeouts, to help 23430 track bug 7799. 23431 - Warn more aggressively when flushing microdescriptors to a 23432 microdescriptor cache fails, in an attempt to mitigate bug 8031, 23433 or at least make it more diagnosable. 23434 - Improve debugging output to help track down bug 8185 ("Bug: 23435 outgoing relay cell has n_chan==NULL. Dropping.") 23436 - Log the purpose of a path-bias testing circuit correctly. 23437 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha. 23438 23439 o Minor bugfixes (0.2.4.x log messages that were too noisy): 23440 - Don't attempt to relax the timeout of already opened 1-hop circuits. 23441 They might never timeout. This should eliminate some/all cases of 23442 the relaxed timeout log message. 23443 - Use circuit creation time for network liveness evaluation. This 23444 should eliminate warning log messages about liveness caused 23445 by changes in timeout evaluation. Fixes bug 6572; bugfix on 23446 0.2.4.8-alpha. 23447 - Reduce a path bias length check from notice to info. The message 23448 is triggered when creating controller circuits. Fixes bug 8196; 23449 bugfix on 0.2.4.8-alpha. 23450 - Fix a path state issue that triggered a notice during relay startup. 23451 Fixes bug 8320; bugfix on 0.2.4.10-alpha. 23452 - Reduce occurrences of warns about circuit purpose in 23453 connection_ap_expire_building(). Fixes bug 8477; bugfix on 23454 0.2.4.11-alpha. 23455 23456 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy): 23457 - If we encounter a write failure on a SOCKS connection before we 23458 finish our SOCKS handshake, don't warn that we closed the 23459 connection before we could send a SOCKS reply. Fixes bug 8427; 23460 bugfix on 0.1.0.1-rc. 23461 - Correctly recognize that [::1] is a loopback address. Fixes 23462 bug 8377; bugfix on 0.2.1.3-alpha. 23463 - Fix a directory authority warn caused when we have a large amount 23464 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha. 23465 - Don't log inappropriate heartbeat messages when hibernating: a 23466 hibernating node is _expected_ to drop out of the consensus, 23467 decide it isn't bootstrapped, and so forth. Fixes bug 7302; 23468 bugfix on 0.2.3.1-alpha. 23469 - Don't complain about bootstrapping problems while hibernating. 23470 These complaints reflect a general code problem, but not one 23471 with any problematic effects (no connections are actually 23472 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha. 23473 23474 o Documentation fixes: 23475 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option 23476 names match. Fixes bug 7768. 23477 - Make the torify manpage no longer refer to tsocks; torify hasn't 23478 supported tsocks since 0.2.3.14-alpha. 23479 - Make the tor manpage no longer reference tsocks. 23480 - Fix the GeoIPExcludeUnknown documentation to refer to 23481 ExcludeExitNodes rather than the currently nonexistent 23482 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk. 23483 23484 o Removed files: 23485 - The tor-tsocks.conf is no longer distributed or installed. We 23486 recommend that tsocks users use torsocks instead. Resolves 23487 ticket 8290. 23488 23489 23490Changes in version 0.2.4.11-alpha - 2013-03-11 23491 Tor 0.2.4.11-alpha makes relay measurement by directory authorities 23492 more robust, makes hidden service authentication work again, and 23493 resolves a DPI fingerprint for Tor's SSL transport. 23494 23495 o Major features (directory authorities): 23496 - Directory authorities now support a new consensus method (17) 23497 where they cap the published bandwidth of servers for which 23498 insufficient bandwidth measurements exist. Fixes part of bug 2286. 23499 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer 23500 serve any v2 directory information. Now we can test disabling the 23501 old deprecated v2 directory format, and see whether doing so has 23502 any effect on network load. Begins to fix bug 6783. 23503 - Directory authorities now include inside each vote a statement of 23504 the performance thresholds they used when assigning flags. 23505 Implements ticket 8151. 23506 23507 o Major bugfixes (directory authorities): 23508 - Stop marking every relay as having been down for one hour every 23509 time we restart a directory authority. These artificial downtimes 23510 were messing with our Stable and Guard flag calculations. Fixes 23511 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha. 23512 23513 o Major bugfixes (hidden services): 23514 - Allow hidden service authentication to succeed again. When we 23515 refactored the hidden service introduction code back 23516 in 0.2.4.1-alpha, we didn't update the code that checks 23517 whether authentication information is present, causing all 23518 authentication checks to return "false". Fix for bug 8207; bugfix 23519 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615. 23520 23521 o Minor features (relays, bridges): 23522 - Make bridge relays check once a minute for whether their IP 23523 address has changed, rather than only every 15 minutes. Resolves 23524 bugs 1913 and 1992. 23525 - Refactor resolve_my_address() so it returns the method by which we 23526 decided our public IP address (explicitly configured, resolved from 23527 explicit hostname, guessed from interfaces, learned by gethostname). 23528 Now we can provide more helpful log messages when a relay guesses 23529 its IP address incorrectly (e.g. due to unexpected lines in 23530 /etc/hosts). Resolves ticket 2267. 23531 - Teach bridge-using clients to avoid 0.2.2 bridges when making 23532 microdescriptor-related dir requests, and only fall back to normal 23533 descriptors if none of their bridges can handle microdescriptors 23534 (as opposed to the fix in ticket 4013, which caused them to fall 23535 back to normal descriptors if *any* of their bridges preferred 23536 them). Resolves ticket 4994. 23537 - Randomize the lifetime of our SSL link certificate, so censors can't 23538 use the static value for filtering Tor flows. Resolves ticket 8443; 23539 related to ticket 4014 which was included in 0.2.2.33. 23540 - Support a new version of the link protocol that allows 4-byte circuit 23541 IDs. Previously, circuit IDs were limited to 2 bytes, which presented 23542 a possible resource exhaustion issue. Closes ticket 7351; implements 23543 proposal 214. 23544 23545 o Minor features (portability): 23546 - Tweak the curve25519-donna*.c implementations to tolerate systems 23547 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha. 23548 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine 23549 the signs of types during autoconf. This is better than our old 23550 approach, which didn't work when cross-compiling. 23551 - Detect the sign of enum values, rather than assuming that MSC is the 23552 only compiler where enum types are all signed. Fixes bug 7727; 23553 bugfix on 0.2.4.10-alpha. 23554 23555 o Minor features (other): 23556 - Say "KBytes" rather than "KB" in the man page (for various values 23557 of K), to further reduce confusion about whether Tor counts in 23558 units of memory or fractions of units of memory. Resolves ticket 7054. 23559 - Clear the high bit on curve25519 public keys before passing them to 23560 our backend, in case we ever wind up using a backend that doesn't do 23561 so itself. If we used such a backend, and *didn't* clear the high bit, 23562 we could wind up in a situation where users with such backends would 23563 be distinguishable from users without. Fixes bug 8121; bugfix on 23564 0.2.4.8-alpha. 23565 - Update to the March 6 2013 Maxmind GeoLite Country database. 23566 23567 o Minor bugfixes (clients): 23568 - When we receive a RELAY_END cell with the reason DONE, or with no 23569 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS 23570 status as "connection refused". Previously we reported these cases 23571 as success but then immediately closed the connection. Fixes bug 23572 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed". 23573 - Downgrade an assertion in connection_ap_expire_beginning to an 23574 LD_BUG message. The fix for bug 8024 should prevent this message 23575 from displaying, but just in case, a warn that we can diagnose 23576 is better than more assert crashes. Fixes bug 8065; bugfix on 23577 0.2.4.8-alpha. 23578 - Lower path use bias thresholds to .80 for notice and .60 for warn. 23579 Also make the rate limiting flags for the path use bias log messages 23580 independent from the original path bias flags. Fixes bug 8161; 23581 bugfix on 0.2.4.10-alpha. 23582 23583 o Minor bugfixes (relays): 23584 - Stop trying to resolve our hostname so often (e.g. every time we 23585 think about doing a directory fetch). Now we reuse the cached 23586 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc) 23587 and 2410 (bugfix on 0.1.2.2-alpha). 23588 - Stop sending a stray "(null)" in some cases for the server status 23589 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix 23590 on 0.1.2.6-alpha. 23591 - When choosing which stream on a formerly stalled circuit to wake 23592 first, make better use of the platform's weak RNG. Previously, 23593 we had been using the % ("modulo") operator to try to generate a 23594 1/N chance of picking each stream, but this behaves badly with 23595 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on 23596 0.2.2.20-alpha. 23597 - Use our own weak RNG when we need a weak RNG. Windows's rand() and 23598 Irix's random() only return 15 bits; Solaris's random() returns more 23599 bits but its RAND_MAX says it only returns 15, and so on. Motivated 23600 by the fix for bug 7801; bugfix on 0.2.2.20-alpha. 23601 23602 o Minor bugfixes (directory authorities): 23603 - Directory authorities now use less space when formatting identical 23604 microdescriptor lines in directory votes. Fixes bug 8158; bugfix 23605 on 0.2.4.1-alpha. 23606 23607 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816): 23608 - Avoid leaking memory if we fail to compute a consensus signature 23609 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha. 23610 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix 23611 on 0.2.1.1-alpha. 23612 - Fix a memory leak during safe-cookie controller authentication. 23613 Bugfix on 0.2.3.13-alpha. 23614 - Avoid memory leak of IPv6 policy content if we fail to format it into 23615 a router descriptor. Bugfix on 0.2.4.7-alpha. 23616 23617 o Minor bugfixes (other code correctness issues): 23618 - Avoid a crash if we fail to generate an extrainfo descriptor. 23619 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity; 23620 this is CID 718634. 23621 - When detecting the largest possible file descriptor (in order to 23622 close all file descriptors when launching a new program), actually 23623 use _SC_OPEN_MAX. The old code for doing this was very, very broken. 23624 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this 23625 is CID 743383. 23626 - Fix a copy-and-paste error when adding a missing A1 to a routerset 23627 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650. 23628 Bugfix on 0.2.4.10-alpha. 23629 - Fix an impossible-to-trigger integer overflow when estimating how 23630 long our onionskin queue would take. (This overflow would require us 23631 to accept 4 million onionskins before processing 100 of them.) Fixes 23632 bug 8210; bugfix on 0.2.4.10-alpha. 23633 23634 o Code simplification and refactoring: 23635 - Add a wrapper function for the common "log a message with a 23636 rate-limit" case. 23637 23638 23639Changes in version 0.2.4.10-alpha - 2013-02-04 23640 Tor 0.2.4.10-alpha adds defenses at the directory authority level from 23641 certain attacks that flood the network with relays; changes the queue 23642 for circuit create requests from a sized-based limit to a time-based 23643 limit; resumes building with MSVC on Windows; and fixes a wide variety 23644 of other issues. 23645 23646 o Major bugfixes (directory authority): 23647 - When computing directory thresholds, ignore any rejected-as-sybil 23648 nodes during the computation so that they can't influence Fast, 23649 Guard, etc. (We should have done this for proposal 109.) Fixes 23650 bug 8146. 23651 - When marking a node as a likely sybil, reset its uptime metrics 23652 to zero, so that it cannot time towards getting marked as Guard, 23653 Stable, or HSDir. (We should have done this for proposal 109.) Fixes 23654 bug 8147. 23655 23656 o Major bugfixes: 23657 - When a TLS write is partially successful but incomplete, remember 23658 that the flushed part has been flushed, and notice that bytes were 23659 actually written. Reported and fixed pseudonymously. Fixes bug 23660 7708; bugfix on Tor 0.1.0.5-rc. 23661 - Reject bogus create and relay cells with 0 circuit ID or 0 stream 23662 ID: these could be used to create unexpected streams and circuits 23663 which would count as "present" to some parts of Tor but "absent" 23664 to others, leading to zombie circuits and streams or to a bandwidth 23665 denial-of-service. Fixes bug 7889; bugfix on every released version 23666 of Tor. Reported by "oftc_must_be_destroyed". 23667 - Rename all macros in our local copy of queue.h to begin with "TOR_". 23668 This change seems the only good way to permanently prevent conflicts 23669 with queue.h on various operating systems. Fixes bug 8107; bugfix 23670 on 0.2.4.6-alpha. 23671 23672 o Major features (relay): 23673 - Instead of limiting the number of queued onionskins (aka circuit 23674 create requests) to a fixed, hard-to-configure number, we limit 23675 the size of the queue based on how many we expect to be able to 23676 process in a given amount of time. We estimate the time it will 23677 take to process an onionskin based on average processing time 23678 of previous onionskins. Closes ticket 7291. You'll never have to 23679 configure MaxOnionsPending again. 23680 23681 o Major features (portability): 23682 - Resume building correctly with MSVC and Makefile.nmake. This patch 23683 resolves numerous bugs and fixes reported by ultramage, including 23684 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669. 23685 - Make the ntor and curve25519 code build correctly with MSVC. 23686 Fix on 0.2.4.8-alpha. 23687 23688 o Minor features: 23689 - When directory authorities are computing thresholds for flags, 23690 never let the threshold for the Fast flag fall below 4096 23691 bytes. Also, do not consider nodes with extremely low bandwidths 23692 when deciding thresholds for various directory flags. This change 23693 should raise our threshold for Fast relays, possibly in turn 23694 improving overall network performance; see ticket 1854. Resolves 23695 ticket 8145. 23696 - The Tor client now ignores sub-domain components of a .onion 23697 address. This change makes HTTP "virtual" hosting 23698 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and 23699 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites 23700 hosted on the same hidden service. Implements proposal 204. 23701 - We compute the overhead from passing onionskins back and forth to 23702 cpuworkers, and report it when dumping statistics in response to 23703 SIGUSR1. Supports ticket 7291. 23704 23705 o Minor features (path selection): 23706 - When deciding whether we have enough descriptors to build circuits, 23707 instead of looking at raw relay counts, look at which fraction 23708 of (bandwidth-weighted) paths we're able to build. This approach 23709 keeps clients from building circuits if their paths are likely to 23710 stand out statistically. The default fraction of paths needed is 23711 taken from the consensus directory; you can override it with the 23712 new PathsNeededToBuildCircuits option. Fixes ticket 5956. 23713 - When any country code is listed in ExcludeNodes or ExcludeExitNodes, 23714 and we have GeoIP information, also exclude all nodes with unknown 23715 countries "??" and "A1". This behavior is controlled by the 23716 new GeoIPExcludeUnknown option: you can make such nodes always 23717 excluded with "GeoIPExcludeUnknown 1", and disable the feature 23718 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto" 23719 gets you the default behavior. Implements feature 7706. 23720 - Path Use Bias: Perform separate accounting for successful circuit 23721 use. Keep separate statistics on stream attempt rates versus stream 23722 success rates for each guard. Provide configurable thresholds to 23723 determine when to emit log messages or disable use of guards that 23724 fail too many stream attempts. Resolves ticket 7802. 23725 23726 o Minor features (log messages): 23727 - When learning a fingerprint for a bridge, log its corresponding 23728 transport type. Implements ticket 7896. 23729 - Improve the log message when "Bug/attack: unexpected sendme cell 23730 from client" occurs, to help us track bug 8093. 23731 23732 o Minor bugfixes: 23733 - Remove a couple of extraneous semicolons that were upsetting the 23734 cparser library. Patch by Christian Grothoff. Fixes bug 7115; 23735 bugfix on 0.2.2.1-alpha. 23736 - Remove a source of rounding error during path bias count scaling; 23737 don't count cannibalized circuits as used for path bias until we 23738 actually try to use them; and fix a circuit_package_relay_cell() 23739 warning message about n_chan==NULL. Fixes bug 7802. 23740 - Detect nacl when its headers are in a nacl/ subdirectory. Also, 23741 actually link against nacl when we're configured to use it. Fixes 23742 bug 7972; bugfix on 0.2.4.8-alpha. 23743 - Compile correctly with the --disable-curve25519 option. Fixes 23744 bug 8153; bugfix on 0.2.4.8-alpha. 23745 23746 o Build improvements: 23747 - Do not report status verbosely from autogen.sh unless the -v flag 23748 is specified. Fixes issue 4664. Patch from Onizuka. 23749 - Replace all calls to snprintf() outside of src/ext with 23750 tor_snprintf(). Also remove the #define to replace snprintf with 23751 _snprintf on Windows; they have different semantics, and all of 23752 our callers should be using tor_snprintf() anyway. Fixes bug 7304. 23753 - Try to detect if we are ever building on a platform where 23754 memset(...,0,...) does not set the value of a double to 0.0. Such 23755 platforms are permitted by the C standard, though in practice 23756 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't 23757 currently support them, but it's better to detect them and fail 23758 than to perform erroneously. 23759 23760 o Removed features: 23761 - Stop exporting estimates of v2 and v3 directory traffic shares 23762 in extrainfo documents. They were unneeded and sometimes inaccurate. 23763 Also stop exporting any v2 directory request statistics. Resolves 23764 ticket 5823. 23765 - Drop support for detecting and warning about versions of Libevent 23766 before 1.3e. Nothing reasonable ships with them any longer; 23767 warning the user about them shouldn't be needed. Resolves ticket 23768 6826. 23769 23770 o Code simplifications and refactoring: 23771 - Rename "isin" functions to "contains", for grammar. Resolves 23772 ticket 5285. 23773 - Rename Tor's logging function log() to tor_log(), to avoid conflicts 23774 with the natural logarithm function from the system libm. Resolves 23775 ticket 7599. 23776 23777 23778Changes in version 0.2.4.9-alpha - 2013-01-15 23779 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake 23780 work more robustly. 23781 23782 o Major bugfixes: 23783 - Fix backward compatibility logic when receiving an embedded ntor 23784 handshake tunneled in a CREATE cell. This clears up the "Bug: 23785 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix 23786 on 0.2.4.8-alpha. 23787 23788 23789Changes in version 0.2.4.8-alpha - 2013-01-14 23790 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration 23791 risks, adds a new stronger and faster circuit handshake, and offers 23792 stronger and faster link encryption when both sides support it. 23793 23794 o Major features: 23795 - Preliminary support for directory guards (proposal 207): when 23796 possible, clients now use their entry guards for non-anonymous 23797 directory requests. This can help prevent client enumeration. Note 23798 that this behavior only works when we have a usable consensus 23799 directory, and when options about what to download are more or less 23800 standard. In the future we should re-bootstrap from our guards, 23801 rather than re-bootstrapping from the preconfigured list of 23802 directory sources that ships with Tor. Resolves ticket 6526. 23803 - Tor relays and clients now support a better CREATE/EXTEND cell 23804 format, allowing the sender to specify multiple address, identity, 23805 and handshake types. Implements Robert Ransom's proposal 200; 23806 closes ticket 7199. 23807 23808 o Major features (new circuit handshake): 23809 - Tor now supports a new circuit extension handshake designed by Ian 23810 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original 23811 circuit extension handshake, later called "TAP", was a bit slow 23812 (especially on the relay side), had a fragile security proof, and 23813 used weaker keys than we'd now prefer. The new circuit handshake 23814 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman 23815 function, making it significantly more secure than the older 23816 handshake, and significantly faster. Tor can use one of two built-in 23817 pure-C curve25519-donna implementations by Adam Langley, or it 23818 can link against the "nacl" library for a tuned version if present. 23819 23820 The built-in version is very fast for 64-bit systems when building 23821 with GCC. The built-in 32-bit version is still faster than the 23822 old TAP protocol, but using libnacl is better on most such hosts. 23823 23824 Clients don't currently use this protocol by default, since 23825 comparatively few clients support it so far. To try it, set 23826 UseNTorHandshake to 1. 23827 23828 Implements proposal 216; closes ticket 7202. 23829 23830 o Major features (better link encryption): 23831 - Relays can now enable the ECDHE TLS ciphersuites when available 23832 and appropriate. These ciphersuites let us negotiate forward-secure 23833 TLS secret keys more safely and more efficiently than with our 23834 previous use of Diffie-Hellman modulo a 1024-bit prime. By default, 23835 public relays prefer the (faster) P224 group, and bridges prefer 23836 the (more common) P256 group; you can override this with the 23837 TLSECGroup option. 23838 23839 Enabling these ciphers was a little tricky, since for a long time, 23840 clients had been claiming to support them without actually doing 23841 so, in order to foil fingerprinting. But with the client-side 23842 implementation of proposal 198 in 0.2.3.17-beta, clients can now 23843 match the ciphers from recent Firefox versions *and* list the 23844 ciphers they actually mean, so relays can believe such clients 23845 when they advertise ECDHE support in their TLS ClientHello messages. 23846 23847 This feature requires clients running 0.2.3.17-beta or later, 23848 and requires both sides to be running OpenSSL 1.0.0 or later 23849 with ECC support. OpenSSL 1.0.1, with the compile-time option 23850 "enable-ec_nistp_64_gcc_128", is highly recommended. 23851 23852 Implements the relay side of proposal 198; closes ticket 7200. 23853 23854 o Major bugfixes: 23855 - Avoid crashing when, as a relay without IPv6-exit support, a 23856 client insists on getting an IPv6 address or nothing. Fixes bug 23857 7814; bugfix on 0.2.4.7-alpha. 23858 23859 o Minor features: 23860 - Improve circuit build timeout handling for hidden services. 23861 In particular: adjust build timeouts more accurately depending 23862 upon the number of hop-RTTs that a particular circuit type 23863 undergoes. Additionally, launch intro circuits in parallel 23864 if they timeout, and take the first one to reply as valid. 23865 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are 23866 separate error codes; or at least, don't break for that reason. 23867 Fixes bug 7935. Reported by "oftc_must_be_destroyed". 23868 - Update to the January 2 2013 Maxmind GeoLite Country database. 23869 23870 o Minor features (testing): 23871 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH 23872 (P-256) Diffie-Hellman handshakes to src/or/bench. 23873 - Add benchmark functions to test onion handshake performance. 23874 23875 o Minor features (path bias detection): 23876 - Alter the Path Bias log messages to be more descriptive in terms 23877 of reporting timeouts and other statistics. 23878 - Create three levels of Path Bias log messages, as opposed to just 23879 two. These are configurable via consensus as well as via the torrc 23880 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate. 23881 The default values are 0.70, 0.50, and 0.30 respectively. 23882 - Separate the log message levels from the decision to drop guards, 23883 which also is available via torrc option PathBiasDropGuards. 23884 PathBiasDropGuards still defaults to 0 (off). 23885 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards 23886 in combination with PathBiasExtremeRate. 23887 - Increase the default values for PathBiasScaleThreshold and 23888 PathBiasCircThreshold from (200, 20) to (300, 150). 23889 - Add in circuit usage accounting to path bias. If we try to use a 23890 built circuit but fail for any reason, it counts as path bias. 23891 Certain classes of circuits where the adversary gets to pick your 23892 destination node are exempt from this accounting. Usage accounting 23893 can be specifically disabled via consensus parameter or torrc. 23894 - Convert all internal path bias state to double-precision floating 23895 point, to avoid roundoff error and other issues. 23896 - Only record path bias information for circuits that have completed 23897 *two* hops. Assuming end-to-end tagging is the attack vector, this 23898 makes us more resilient to ambient circuit failure without any 23899 detection capability loss. 23900 23901 o Minor bugfixes (log messages): 23902 - Rate-limit the "No circuits are opened. Relaxed timeout for a 23903 circuit with channel state open..." message to once per hour to 23904 keep it from filling the notice logs. Mitigates bug 7799 but does 23905 not fix the underlying cause. Bugfix on 0.2.4.7-alpha. 23906 - Avoid spurious warnings when configuring multiple client ports of 23907 which only some are nonlocal. Previously, we had claimed that some 23908 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on 23909 0.2.3.3-alpha. 23910 23911 o Code simplifications and refactoring: 23912 - Get rid of a couple of harmless clang warnings, where we compared 23913 enums to ints. These warnings are newly introduced in clang 3.2. 23914 - Split the onion.c file into separate modules for the onion queue 23915 and the different handshakes it supports. 23916 - Remove the marshalling/unmarshalling code for sending requests to 23917 cpuworkers over a socket, and instead just send structs. The 23918 recipient will always be the same Tor binary as the sender, so 23919 any encoding is overkill. 23920 23921 23922Changes in version 0.2.4.7-alpha - 2012-12-24 23923 Tor 0.2.4.7-alpha introduces a new approach to providing fallback 23924 directory mirrors for more robust bootstrapping; fixes more issues where 23925 clients with changing network conditions refuse to make any circuits; 23926 adds initial support for exiting to IPv6 addresses; resumes being able 23927 to update our GeoIP database, and includes the geoip6 file this time; 23928 turns off the client-side DNS cache by default due to privacy risks; 23929 and fixes a variety of other issues. 23930 23931 o Major features (client resilience): 23932 - Add a new "FallbackDir" torrc option to use when we can't use 23933 a directory mirror from the consensus (either because we lack a 23934 consensus, or because they're all down). Currently, all authorities 23935 are fallbacks by default, and there are no other default fallbacks, 23936 but that will change. This option will allow us to give clients a 23937 longer list of servers to try to get a consensus from when first 23938 connecting to the Tor network, and thereby reduce load on the 23939 directory authorities. Implements proposal 206, "Preconfigured 23940 directory sources for bootstrapping". We also removed the old 23941 "FallbackNetworkstatus" option, since we never got it working well 23942 enough to use it. Closes bug 572. 23943 - If we have no circuits open, use a relaxed timeout (the 23944 95-percentile cutoff) until a circuit succeeds. This heuristic 23945 should allow Tor to succeed at building circuits even when the 23946 network connection drastically changes. Should help with bug 3443. 23947 23948 o Major features (IPv6): 23949 - Relays can now exit to IPv6 addresses: make sure that you have IPv6 23950 connectivity, then set the IPv6Exit flag to 1. Also make sure your 23951 exit policy reads as you would like: the address * applies to all 23952 address families, whereas *4 is IPv4 address only, and *6 is IPv6 23953 addresses only. On the client side, you'll need to wait until the 23954 authorities have upgraded, wait for enough exits to support IPv6, 23955 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes 23956 ticket 5547, implements proposal 117 as revised in proposal 208. 23957 23958 We DO NOT recommend that clients with actual anonymity needs start 23959 using IPv6 over Tor yet, since not enough exits support it yet. 23960 23961 o Major features (geoip database): 23962 - Maxmind began labelling Tor relays as being in country "A1", 23963 which breaks by-country node selection inside Tor. Now we use a 23964 script to replace "A1" ("Anonymous Proxy") entries in our geoip 23965 file with real country codes. This script fixes about 90% of "A1" 23966 entries automatically and uses manual country code assignments to 23967 fix the remaining 10%. See src/config/README.geoip for details. 23968 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite 23969 Country database, as modified above. 23970 23971 o Major bugfixes (client-side DNS): 23972 - Turn off the client-side DNS cache by default. Updating and using 23973 the DNS cache is now configurable on a per-client-port 23974 level. SOCKSPort, DNSPort, etc lines may now contain 23975 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't 23976 cache these types of DNS answers when we receive them from an 23977 exit node in response to an application request on this port, and 23978 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have 23979 cached DNS answers of these types, we shouldn't use them. It's 23980 potentially risky to use cached DNS answers at the client, since 23981 doing so can indicate to one exit what answers we've gotten 23982 for DNS lookups in the past. With IPv6, this becomes especially 23983 problematic. Using cached DNS answers for requests on the same 23984 circuit would present less linkability risk, since all traffic 23985 on a circuit is already linkable, but it would also provide 23986 little performance benefit: the exit node caches DNS replies 23987 too. Implements a simplified version of Proposal 205. Implements 23988 ticket 7570. 23989 23990 o Major bugfixes (other): 23991 - Alter circuit build timeout measurement to start at the point 23992 where we begin the CREATE/CREATE_FAST step (as opposed to circuit 23993 initialization). This should make our timeout measurements more 23994 uniform. Previously, we were sometimes including ORconn setup time 23995 in our circuit build time measurements. Should resolve bug 3443. 23996 - Fix an assertion that could trigger in hibernate_go_dormant() when 23997 closing an or_connection_t: call channel_mark_for_close() rather 23998 than connection_mark_for_close(). Fixes bug 7267. Bugfix on 23999 0.2.4.4-alpha. 24000 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug 24001 7655; bugfix on 0.2.4.6-alpha. 24002 24003 o Minor features: 24004 - Add a new torrc option "ServerTransportListenAddr" to let bridge 24005 operators select the address where their pluggable transports will 24006 listen for connections. Resolves ticket 7013. 24007 - Allow an optional $ before the node identity digest in the 24008 controller command GETINFO ns/id/<identity>, for consistency with 24009 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059. 24010 - Log packaged cell fullness as part of the heartbeat message. 24011 Diagnosis to try to determine the extent of bug 7743. 24012 24013 o Minor features (IPv6): 24014 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we 24015 prefer to hand out virtual IPv6 addresses, since there are more of 24016 them and we can't run out. To override this behavior and make IPv4 24017 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort 24018 or DNSPort you're using for resolving. Implements ticket 7571. 24019 - AutomapHostsOnResolve responses are now randomized, to avoid 24020 annoying situations where Tor is restarted and applications 24021 connect to the wrong addresses. 24022 - Never try more than 1000 times to pick a new virtual address when 24023 AutomapHostsOnResolve is set. That's good enough so long as we 24024 aren't close to handing out our entire virtual address space; 24025 if you're getting there, it's best to switch to IPv6 virtual 24026 addresses anyway. 24027 24028 o Minor bugfixes: 24029 - The ADDRMAP command can no longer generate an ill-formed error 24030 code on a failed MAPADDRESS. It now says "internal" rather than 24031 an English sentence fragment with spaces in the middle. Bugfix on 24032 Tor 0.2.0.19-alpha. 24033 - Fix log messages and comments to avoid saying "GMT" when we mean 24034 "UTC". Fixes bug 6113. 24035 - Compile on win64 using mingw64. Fixes bug 7260; patches from 24036 "yayooo". 24037 - Fix a crash when debugging unit tests on Windows: deallocate a 24038 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306; 24039 bugfix on 0.2.2.17-alpha. Reported by "ultramage". 24040 24041 o Renamed options: 24042 - The DirServer option is now DirAuthority, for consistency with 24043 current naming patterns. You can still use the old DirServer form. 24044 24045 o Code simplification and refactoring: 24046 - Move the client-side address-map/virtual-address/DNS-cache code 24047 out of connection_edge.c into a new addressmap.c module. 24048 - Remove unused code for parsing v1 directories and "running routers" 24049 documents. Fixes bug 6887. 24050 24051 24052Changes in version 0.2.3.25 - 2012-11-19 24053 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi" 24054 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher, 24055 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer, 24056 programmer, and friend. Unstinting in his dedication to the cause of 24057 freedom, he inspired and helped many of us as we began our work on 24058 anonymity, and inspires us still. Please honor his memory by writing 24059 software to protect people's freedoms, and by helping others to do so. 24060 24061 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features 24062 significantly reduced directory overhead (via microdescriptors), 24063 enormous crypto performance improvements for fast relays on new 24064 enough hardware, a new v3 TLS handshake protocol that can better 24065 resist fingerprinting, support for protocol obfuscation plugins (aka 24066 pluggable transports), better scalability for hidden services, IPv6 24067 support for bridges, performance improvements like allowing clients 24068 to skip the first round-trip on the circuit ("optimistic data") and 24069 refilling token buckets more often, a new "stream isolation" design 24070 to isolate different applications on different circuits, and many 24071 stability, security, and privacy fixes. 24072 24073 o Major bugfixes: 24074 - Tor tries to wipe potentially sensitive data after using it, so 24075 that if some subsequent security failure exposes Tor's memory, 24076 the damage will be limited. But we had a bug where the compiler 24077 was eliminating these wipe operations when it decided that the 24078 memory was no longer visible to a (correctly running) program, 24079 hence defeating our attempt at defense in depth. We fix that 24080 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler 24081 is unlikely to optimize away. Future versions of Tor may use 24082 a less ridiculously heavy approach for this. Fixes bug 7352. 24083 Reported in an article by Andrey Karpov. 24084 24085 o Minor bugfixes: 24086 - Fix a harmless bug when opting against publishing a relay descriptor 24087 because DisableNetwork is set. Fixes bug 7464; bugfix on 24088 0.2.3.9-alpha. 24089 24090 24091Changes in version 0.2.4.6-alpha - 2012-11-13 24092 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays, 24093 makes our defense-in-depth memory wiping more reliable, and begins to 24094 count IPv6 addresses in bridge statistics, 24095 24096 o Major bugfixes: 24097 - Fix an assertion failure that could occur when closing a connection 24098 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on 24099 Tor 0.2.4.4-alpha. 24100 - Tor tries to wipe potentially sensitive data after using it, so 24101 that if some subsequent security failure exposes Tor's memory, 24102 the damage will be limited. But we had a bug where the compiler 24103 was eliminating these wipe operations when it decided that the 24104 memory was no longer visible to a (correctly running) program, 24105 hence defeating our attempt at defense in depth. We fix that 24106 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler 24107 is unlikely to optimize away. Future versions of Tor may use 24108 a less ridiculously heavy approach for this. Fixes bug 7352. 24109 Reported in an article by Andrey Karpov. 24110 24111 o Minor features: 24112 - Add GeoIP database for IPv6 addresses. The new config option 24113 is GeoIPv6File. 24114 - Bridge statistics now count bridge clients connecting over IPv6: 24115 bridge statistics files now list "bridge-ip-versions" and 24116 extra-info documents list "geoip6-db-digest". The control protocol 24117 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial 24118 implementation by "shkoo", addressing ticket 5055. 24119 24120 o Minor bugfixes: 24121 - Warn when we are binding low ports when hibernation is enabled; 24122 previously we had warned when we were _advertising_ low ports with 24123 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha. 24124 - Fix a harmless bug when opting against publishing a relay descriptor 24125 because DisableNetwork is set. Fixes bug 7464; bugfix on 24126 0.2.3.9-alpha. 24127 - Add warning message when a managed proxy dies during configuration. 24128 Fixes bug 7195; bugfix on 0.2.4.2-alpha. 24129 - Fix a linking error when building tor-fw-helper without miniupnp. 24130 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile. 24131 - Check for closing an or_connection_t without going through correct 24132 channel functions; emit a warning and then call 24133 connection_or_close_for_error() so we don't assert as in bugs 7212 24134 and 7267. 24135 - Compile correctly on compilers without C99 designated initializer 24136 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha. 24137 - Avoid a possible assert that can occur when channel_send_destroy() is 24138 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED, 24139 or CHANNEL_STATE_ERROR when the Tor process is resumed after being 24140 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha. 24141 - Fix a memory leak on failing cases of channel_tls_process_certs_cell. 24142 Fixes bug 7422; bugfix on 0.2.4.4-alpha. 24143 24144 o Code simplification and refactoring: 24145 - Start using OpenBSD's implementation of queue.h, so that we don't 24146 need to hand-roll our own pointer and list structures whenever we 24147 need them. (We can't rely on a sys/queue.h, since some operating 24148 systems don't have them, and the ones that do have them don't all 24149 present the same extensions.) 24150 24151 24152Changes in version 0.2.4.5-alpha - 2012-10-25 24153 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix 24154 two important security vulnerabilities that could lead to remotely 24155 triggerable relay crashes, fix a major bug that was preventing clients 24156 from choosing suitable exit nodes, and refactor some of our code. 24157 24158 o Major bugfixes (security, also in 0.2.3.24-rc): 24159 - Fix a group of remotely triggerable assertion failures related to 24160 incorrect link protocol negotiation. Found, diagnosed, and fixed 24161 by "some guy from France". Fix for CVE-2012-2250; bugfix on 24162 0.2.3.6-alpha. 24163 - Fix a denial of service attack by which any directory authority 24164 could crash all the others, or by which a single v2 directory 24165 authority could crash everybody downloading v2 directory 24166 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha. 24167 24168 o Major bugfixes (also in 0.2.3.24-rc): 24169 - When parsing exit policy summaries from microdescriptors, we had 24170 previously been ignoring the last character in each one, so that 24171 "accept 80,443,8080" would be treated by clients as indicating 24172 a node that allows access to ports 80, 443, and 808. That would 24173 lead to clients attempting connections that could never work, 24174 and ignoring exit nodes that would support their connections. Now 24175 clients parse these exit policy summaries correctly. Fixes bug 7192; 24176 bugfix on 0.2.3.1-alpha. 24177 24178 o Minor bugfixes (also in 0.2.3.24-rc): 24179 - Clients now consider the ClientRejectInternalAddresses config option 24180 when using a microdescriptor consensus stanza to decide whether 24181 an exit relay would allow exiting to an internal address. Fixes 24182 bug 7190; bugfix on 0.2.3.1-alpha. 24183 24184 o Minor bugfixes: 24185 - Only disable TLS session ticket support when running as a TLS 24186 server. Now clients will blend better with regular Firefox 24187 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc. 24188 24189 o Code simplification and refactoring: 24190 - Start using OpenBSD's implementation of queue.h (originally by 24191 Niels Provos). 24192 - Move the entry node code from circuitbuild.c to its own file. 24193 - Move the circuit build timeout tracking code from circuitbuild.c 24194 to its own file. 24195 24196 24197Changes in version 0.2.3.24-rc - 2012-10-25 24198 Tor 0.2.3.24-rc fixes two important security vulnerabilities that 24199 could lead to remotely triggerable relay crashes, and fixes 24200 a major bug that was preventing clients from choosing suitable exit 24201 nodes. 24202 24203 o Major bugfixes (security): 24204 - Fix a group of remotely triggerable assertion failures related to 24205 incorrect link protocol negotiation. Found, diagnosed, and fixed 24206 by "some guy from France". Fix for CVE-2012-2250; bugfix on 24207 0.2.3.6-alpha. 24208 - Fix a denial of service attack by which any directory authority 24209 could crash all the others, or by which a single v2 directory 24210 authority could crash everybody downloading v2 directory 24211 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha. 24212 24213 o Major bugfixes: 24214 - When parsing exit policy summaries from microdescriptors, we had 24215 previously been ignoring the last character in each one, so that 24216 "accept 80,443,8080" would be treated by clients as indicating 24217 a node that allows access to ports 80, 443, and 808. That would 24218 lead to clients attempting connections that could never work, 24219 and ignoring exit nodes that would support their connections. Now 24220 clients parse these exit policy summaries correctly. Fixes bug 7192; 24221 bugfix on 0.2.3.1-alpha. 24222 24223 o Minor bugfixes: 24224 - Clients now consider the ClientRejectInternalAddresses config option 24225 when using a microdescriptor consensus stanza to decide whether 24226 an exit relay would allow exiting to an internal address. Fixes 24227 bug 7190; bugfix on 0.2.3.1-alpha. 24228 24229 24230Changes in version 0.2.4.4-alpha - 2012-10-20 24231 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy 24232 vulnerability introduced by a change in OpenSSL, fixes a remotely 24233 triggerable assert, and adds new channel_t and circuitmux_t abstractions 24234 that will make it easier to test new connection transport and cell 24235 scheduling algorithms. 24236 24237 o New directory authorities (also in 0.2.3.23-rc): 24238 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory 24239 authority. Closes ticket 5749. 24240 24241 o Major bugfixes (security/privacy, also in 0.2.3.23-rc): 24242 - Disable TLS session tickets. OpenSSL's implementation was giving 24243 our TLS session keys the lifetime of our TLS context objects, when 24244 perfect forward secrecy would want us to discard anything that 24245 could decrypt a link connection as soon as the link connection 24246 was closed. Fixes bug 7139; bugfix on all versions of Tor linked 24247 against OpenSSL 1.0.0 or later. Found by Florent Daignière. 24248 - Discard extraneous renegotiation attempts once the V3 link 24249 protocol has been initiated. Failure to do so left us open to 24250 a remotely triggerable assertion failure. Fixes CVE-2012-2249; 24251 bugfix on 0.2.3.6-alpha. Reported by "some guy from France". 24252 24253 o Internal abstraction features: 24254 - Introduce new channel_t abstraction between circuits and 24255 or_connection_t to allow for implementing alternate OR-to-OR 24256 transports. A channel_t is an abstract object which can either be a 24257 cell-bearing channel, which is responsible for authenticating and 24258 handshaking with the remote OR and transmitting cells to and from 24259 it, or a listening channel, which spawns new cell-bearing channels 24260 at the request of remote ORs. Implements part of ticket 6465. 24261 - Also new is the channel_tls_t subclass of channel_t, adapting it 24262 to the existing or_connection_t code. The V2/V3 protocol handshaking 24263 code which formerly resided in command.c has been moved below the 24264 channel_t abstraction layer and may be found in channeltls.c now. 24265 Implements the rest of ticket 6465. 24266 - Introduce new circuitmux_t storing the queue of circuits for 24267 a channel; this encapsulates and abstracts the queue logic and 24268 circuit selection policy, and allows the latter to be overridden 24269 easily by switching out a policy object. The existing EWMA behavior 24270 is now implemented as a circuitmux_policy_t. Resolves ticket 6816. 24271 24272 o Required libraries: 24273 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is 24274 strongly recommended. 24275 24276 o Minor features: 24277 - Warn users who run hidden services on a Tor client with 24278 UseEntryGuards disabled that their hidden services will be 24279 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the 24280 attack which motivated Tor to support entry guards in the first 24281 place). Resolves ticket 6889. 24282 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from 24283 dhill. Resolves ticket 6982. 24284 - Option OutboundBindAddress can be specified multiple times and 24285 accepts IPv6 addresses. Resolves ticket 6876. 24286 24287 o Minor bugfixes (also in 0.2.3.23-rc): 24288 - Don't serve or accept v2 hidden service descriptors over a 24289 relay's DirPort. It's never correct to do so, and disabling it 24290 might make it more annoying to exploit any bugs that turn up in the 24291 descriptor-parsing code. Fixes bug 7149. 24292 - Fix two cases in src/or/transports.c where we were calling 24293 fmt_addr() twice in a parameter list. Bug found by David 24294 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha. 24295 - Fix memory leaks whenever we logged any message about the "path 24296 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc. 24297 - When relays refuse a "create" cell because their queue of pending 24298 create cells is too big (typically because their cpu can't keep up 24299 with the arrival rate), send back reason "resource limit" rather 24300 than reason "internal", so network measurement scripts can get a 24301 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha. 24302 24303 o Minor bugfixes: 24304 - Command-line option "--version" implies "--quiet". Fixes bug 6997. 24305 - Free some more still-in-use memory at exit, to make hunting for 24306 memory leaks easier. Resolves bug 7029. 24307 - When a Tor client gets a "truncated" relay cell, the first byte of 24308 its payload specifies why the circuit was truncated. We were 24309 ignoring this 'reason' byte when tearing down the circuit, resulting 24310 in the controller not being told why the circuit closed. Now we 24311 pass the reason from the truncated cell to the controller. Bugfix 24312 on 0.1.2.3-alpha; fixes bug 7039. 24313 - Downgrade "Failed to hand off onionskin" messages to "debug" 24314 severity, since they're typically redundant with the "Your computer 24315 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha. 24316 - Make clients running with IPv6 bridges connect over IPv6 again, 24317 even without setting new config options ClientUseIPv6 and 24318 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha. 24319 - Use square brackets around IPv6 addresses in numerous places 24320 that needed them, including log messages, HTTPS CONNECT proxy 24321 requests, TransportProxy statefile entries, and pluggable transport 24322 extra-info lines. Fixes bug 7011; patch by David Fifield. 24323 24324 o Code refactoring and cleanup: 24325 - Source files taken from other packages now reside in src/ext; 24326 previously they were scattered around the rest of Tor. 24327 - Avoid use of reserved identifiers in our C code. The C standard 24328 doesn't like us declaring anything that starts with an 24329 underscore, so let's knock it off before we get in trouble. Fix 24330 for bug 1031; bugfix on the first Tor commit. 24331 24332 24333Changes in version 0.2.3.23-rc - 2012-10-20 24334 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy 24335 vulnerability introduced by a change in OpenSSL, and fixes a variety 24336 of smaller bugs in preparation for the release. 24337 24338 o New directory authorities: 24339 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory 24340 authority. Closes ticket 5749. 24341 24342 o Major bugfixes (security/privacy): 24343 - Disable TLS session tickets. OpenSSL's implementation was giving 24344 our TLS session keys the lifetime of our TLS context objects, when 24345 perfect forward secrecy would want us to discard anything that 24346 could decrypt a link connection as soon as the link connection 24347 was closed. Fixes bug 7139; bugfix on all versions of Tor linked 24348 against OpenSSL 1.0.0 or later. Found by Florent Daignière. 24349 - Discard extraneous renegotiation attempts once the V3 link 24350 protocol has been initiated. Failure to do so left us open to 24351 a remotely triggerable assertion failure. Fixes CVE-2012-2249; 24352 bugfix on 0.2.3.6-alpha. Reported by "some guy from France". 24353 24354 o Major bugfixes: 24355 - Fix a possible crash bug when checking for deactivated circuits 24356 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341; 24357 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously. 24358 24359 o Minor bugfixes (on 0.2.3.x): 24360 - Fix two cases in src/or/transports.c where we were calling 24361 fmt_addr() twice in a parameter list. Bug found by David 24362 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha. 24363 - Convert an assert in the pathbias code to a log message. The assert 24364 appears to only be triggerable by Tor2Web mode. Fixes bug 6866; 24365 bugfix on 0.2.3.17-beta. 24366 - Fix memory leaks whenever we logged any message about the "path 24367 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc. 24368 24369 o Minor bugfixes (on 0.2.2.x and earlier): 24370 - Don't serve or accept v2 hidden service descriptors over a relay's 24371 DirPort. It's never correct to do so, and disabling it might 24372 make it more annoying to exploit any bugs that turn up in the 24373 descriptor-parsing code. Fixes bug 7149. 24374 - When relays refuse a "create" cell because their queue of pending 24375 create cells is too big (typically because their cpu can't keep up 24376 with the arrival rate), send back reason "resource limit" rather 24377 than reason "internal", so network measurement scripts can get a 24378 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037. 24379 - Correct file sizes when reading binary files on Cygwin, to avoid 24380 a bug where Tor would fail to read its state file. Fixes bug 6844; 24381 bugfix on 0.1.2.7-alpha. 24382 - Avoid undefined behavior when parsing the list of supported 24383 rendezvous/introduction protocols in a hidden service descriptor. 24384 Previously, Tor would have confused (as-yet-unused) protocol version 24385 numbers greater than 32 with lower ones on many platforms. Fixes 24386 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis. 24387 24388 o Documentation fixes: 24389 - Clarify that hidden services are TCP only. Fixes bug 6024. 24390 24391 24392Changes in version 0.2.4.3-alpha - 2012-09-22 24393 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable 24394 assertion, resumes letting relays test reachability of their DirPort, 24395 and cleans up a bunch of smaller bugs. 24396 24397 o Security fixes: 24398 - Fix an assertion failure in tor_timegm() that could be triggered 24399 by a badly formatted directory object. Bug found by fuzzing with 24400 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc. 24401 24402 o Major bugfixes: 24403 - Fix a possible crash bug when checking for deactivated circuits 24404 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341; 24405 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously. 24406 - Allow routers to detect that their own DirPorts are running. When 24407 we removed support for versions_supports_begindir, we also 24408 accidentally removed the mechanism we used to self-test our 24409 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815; 24410 bugfix on 0.2.4.2-alpha. 24411 24412 o Security features: 24413 - Switch to a completely time-invariant approach for picking nodes 24414 weighted by bandwidth. Our old approach would run through the 24415 part of the loop after it had made its choice slightly slower 24416 than it ran through the part of the loop before it had made its 24417 choice. Addresses ticket 6538. 24418 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage 24419 by tor2web clients allows hidden services to identify tor2web 24420 clients through their repeated selection of the same rendezvous 24421 and introduction point circuit endpoints (their guards). Resolves 24422 ticket 6888. 24423 24424 o Minor features: 24425 - Enable Tor to read configuration, state, and key information from 24426 a FIFO. Previously Tor would only read from files with a positive 24427 stat.st_size. Code from meejah; fixes bug 6044. 24428 24429 o Minor bugfixes: 24430 - Correct file sizes when reading binary files on Cygwin, to avoid 24431 a bug where Tor would fail to read its state file. Fixes bug 6844; 24432 bugfix on 0.1.2.7-alpha. 24433 - Correctly handle votes with more than 31 flags. Fixes bug 6853; 24434 bugfix on 0.2.0.3-alpha. 24435 - When complaining about a client port on a public address, log 24436 which address we're complaining about. Fixes bug 4020; bugfix on 24437 0.2.3.3-alpha. Patch by Tom Fitzhenry. 24438 - Convert an assert in the pathbias code to a log message. The assert 24439 appears to only be triggerable by Tor2Web mode. Fixes bug 6866; 24440 bugfix on 0.2.3.17-beta. 24441 - Our new buildsystem was overzealous about rebuilding manpages: it 24442 would rebuild them all whenever any one of them changed. Now our 24443 dependency checking should be correct. Fixes bug 6843; bugfix on 24444 0.2.4.1-alpha. 24445 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6 24446 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha. 24447 - Correct log printout about which address family is preferred 24448 when connecting to a bridge with both an IPv4 and IPv6 OR port. 24449 Fixes bug 6884; bugfix on 0.2.4.1-alpha. 24450 24451 o Minor bugfixes (code cleanliness): 24452 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior 24453 with large values. This situation was untriggered, but nevertheless 24454 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha. 24455 - Reject consensus votes with more than 64 known-flags. We aren't even 24456 close to that limit yet, and our code doesn't handle it correctly. 24457 Fixes bug 6833; bugfix on 0.2.0.1-alpha. 24458 - Avoid undefined behavior when parsing the list of supported 24459 rendezvous/introduction protocols in a hidden service descriptor. 24460 Previously, Tor would have confused (as-yet-unused) protocol version 24461 numbers greater than 32 with lower ones on many platforms. Fixes 24462 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis. 24463 - Fix handling of rendezvous client authorization types over 8. 24464 Fixes bug 6861; bugfix on 0.2.1.5-alpha. 24465 - Fix building with older versions of GCC (2.95, for one) that don't 24466 like preprocessor directives inside macro arguments. Found by 24467 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha. 24468 - Switch weighted node selection rule from using a list of doubles 24469 to using a list of int64_t. This change should make the process 24470 slightly easier to debug and maintain. Needed to finish ticket 6538. 24471 24472 o Code simplification and refactoring: 24473 - Move the generic "config" code into a new file, and have "config.c" 24474 hold only torrc- and state-related code. Resolves ticket 6823. 24475 - Move the core of our "choose a weighted element at random" logic 24476 into its own function, and give it unit tests. Now the logic is 24477 testable, and a little less fragile too. 24478 - Removed the testing_since field of node_t, which hasn't been used 24479 for anything since 0.2.0.9-alpha. 24480 24481 o Documentation fixes: 24482 - Clarify that hidden services are TCP only. Fixes bug 6024. 24483 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on 24484 0.2.3.14-alpha. 24485 24486 24487Changes in version 0.2.3.22-rc - 2012-09-11 24488 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable 24489 assertion. 24490 24491 o Security fixes: 24492 - Fix an assertion failure in tor_timegm() that could be triggered 24493 by a badly formatted directory object. Bug found by fuzzing with 24494 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc. 24495 24496 o Minor bugfixes: 24497 - Avoid segfault when starting up having run with an extremely old 24498 version of Tor and parsing its state file. Fixes bug 6801; bugfix 24499 on 0.2.2.23-alpha. 24500 24501 24502Changes in version 0.2.2.39 - 2012-09-11 24503 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable 24504 assertions. 24505 24506 o Security fixes: 24507 - Fix an assertion failure in tor_timegm() that could be triggered 24508 by a badly formatted directory object. Bug found by fuzzing with 24509 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc. 24510 - Do not crash when comparing an address with port value 0 to an 24511 address policy. This bug could have been used to cause a remote 24512 assertion failure by or against directory authorities, or to 24513 allow some applications to crash clients. Fixes bug 6690; bugfix 24514 on 0.2.1.10-alpha. 24515 24516 24517Changes in version 0.2.4.2-alpha - 2012-09-10 24518 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports, 24519 raises the default rate limiting even more, and makes the bootstrapping 24520 log messages less noisy. 24521 24522 o Major features: 24523 - Automatically forward the TCP ports of pluggable transport 24524 proxies using tor-fw-helper if PortForwarding is enabled. Implements 24525 ticket 4567. 24526 24527 o Major bugfixes: 24528 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB 24529 to 1GB/1GB. The previous defaults were intended to be "basically 24530 infinite", but it turns out they're now limiting our 100mbit+ 24531 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the 24532 last time we raised it). 24533 24534 o Minor features: 24535 - Detect when we're running with a version of OpenSSL other than the 24536 one we compiled with. This has occasionally given people hard-to- 24537 track-down errors. 24538 - Log fewer lines at level "notice" about our OpenSSL and Libevent 24539 versions and capabilities when everything is going right. Resolves 24540 part of ticket 6736. 24541 - Directory authorities no long accept descriptors for any version of 24542 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha. 24543 These versions are insecure, unsupported, or both. Implements 24544 ticket 6789. 24545 24546 o Minor bugfixes: 24547 - Rename the (internal-use-only) UsingTestingNetworkDefaults option 24548 to start with a triple-underscore so the controller won't touch it. 24549 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha. 24550 - Avoid segfault when starting up having run with an extremely old 24551 version of Tor and parsing its state file. Fixes bug 6801; bugfix 24552 on 0.2.2.23-alpha. 24553 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option 24554 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha. 24555 - Don't follow the NULL pointer if microdescriptor generation fails. 24556 (This does not appear to be triggerable, but it's best to be safe.) 24557 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha. 24558 - Fix mis-declared dependencies on src/common/crypto.c and 24559 src/or/tor_main.c that could break out-of-tree builds under some 24560 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha. 24561 - Avoid a warning when building common_sha1.i out of tree. Fixes bug 24562 6778; bugfix on 0.2.4.1-alpha. 24563 - Fix a harmless (in this case) build warning for implicitly 24564 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha. 24565 24566 o Removed features: 24567 - Now that all versions before 0.2.2.x are disallowed, we no longer 24568 need to work around their missing features. Thus we can remove a 24569 bunch of compatibility code. 24570 24571 o Code refactoring: 24572 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary 24573 TCP ports to forward. In the past it only accepted two ports: 24574 the ORPort and the DirPort. 24575 24576 24577Changes in version 0.2.4.1-alpha - 2012-09-05 24578 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to 24579 bridgedb; lets relays use IPv6 addresses and directory authorities 24580 advertise them; and switches to a cleaner build interface. 24581 24582 This is the first alpha release in a new series, so expect there to 24583 be bugs. Users who would rather test out a more stable branch should 24584 stay with 0.2.3.x for now. 24585 24586 o Major features (bridges): 24587 - Bridges now report the pluggable transports they support to the 24588 bridge authority, so it can pass the supported transports on to 24589 bridgedb and/or eventually do reachability testing. Implements 24590 ticket 3589. 24591 24592 o Major features (IPv6): 24593 - Bridge authorities now accept IPv6 bridge addresses and include 24594 them in network status documents. Implements ticket 5534. 24595 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over 24596 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely 24597 to happen. Implements ticket 5535. 24598 - All kind of relays, not just bridges, can now advertise an IPv6 24599 OR port. Implements ticket 6362. 24600 - Directory authorities vote on IPv6 OR ports using the new consensus 24601 method 14. Implements ticket 6363. 24602 24603 o Major features (build): 24604 - Switch to a nonrecursive Makefile structure. Now instead of each 24605 Makefile.am invoking other Makefile.am's, there is a master 24606 Makefile.am that includes the others. This change makes our build 24607 process slightly more maintainable, and improves parallelism for 24608 building with make -j. Original patch by Stewart Smith; various 24609 fixes by Jim Meyering. 24610 - Where available, we now use automake's "silent" make rules by 24611 default, so that warnings are easier to spot. You can get the old 24612 behavior with "make V=1". Patch by Stewart Smith for ticket 6522. 24613 24614 o Minor features (code security and spec conformance): 24615 - Clear keys and key-derived material left on the stack in 24616 rendservice.c and rendclient.c. Check return value of 24617 crypto_pk_write_private_key_to_string() in rend_service_load_keys(). 24618 These fixes should make us more forward-secure against cold-boot 24619 attacks and the like. Fixes bug 2385. 24620 - Reject EXTEND cells sent to nonexistent streams. According to the 24621 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but 24622 we were only checking for stream IDs that were currently in use. 24623 Found while hunting for more instances of bug 6271. Bugfix on 24624 0.0.2pre8, which introduced incremental circuit construction. 24625 24626 o Minor features (streamlining); 24627 - No longer include the "opt" prefix when generating routerinfos 24628 or v2 directories: it has been needless since Tor 0.1.2. Closes 24629 ticket 5124. 24630 - Remove some now-needless code that tried to aggressively flush 24631 OR connections as data was added to them. Since 0.2.0.1-alpha, our 24632 cell queue logic has saved us from the failure mode that this code 24633 was supposed to prevent. Removing this code will limit the number 24634 of baroque control flow paths through Tor's network logic. Reported 24635 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha. 24636 24637 o Minor features (controller): 24638 - Add a "GETINFO signal/names" control port command. Implements 24639 ticket 3842. 24640 - Provide default values for all options via "GETINFO config/defaults". 24641 Implements ticket 4971. 24642 24643 o Minor features (IPv6): 24644 - New config option "AuthDirHasIPv6Connectivity 1" that directory 24645 authorities should set if they have IPv6 connectivity and want to 24646 do reachability tests for IPv6 relays. Implements feature 5974. 24647 - A relay with an IPv6 OR port now sends that address in NETINFO 24648 cells (in addition to its other address). Implements ticket 6364. 24649 24650 o Minor features (log messages): 24651 - Omit the first heartbeat log message, because it never has anything 24652 useful to say, and it clutters up the bootstrapping messages. 24653 Resolves ticket 6758. 24654 - Don't log about reloading the microdescriptor cache at startup. Our 24655 bootstrap warnings are supposed to tell the user when there's a 24656 problem, and our bootstrap notices say when there isn't. Resolves 24657 ticket 6759; bugfix on 0.2.2.6-alpha. 24658 - Don't log "I learned some more directory information" when we're 24659 reading cached directory information. Reserve it for when new 24660 directory information arrives in response to a fetch. Resolves 24661 ticket 6760. 24662 - Prevent rounding error in path bias counts when scaling 24663 them down, and use the correct scale factor default. Also demote 24664 some path bias related log messages down a level and make others 24665 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta. 24666 - We no longer warn so much when generating manpages from their 24667 asciidoc source. 24668 24669 o Code simplifications and refactoring: 24670 - Enhance our internal sscanf replacement so that we can eliminate 24671 the last remaining uses of the system sscanf. (Though those uses 24672 of sscanf were safe, sscanf itself is generally error prone, so 24673 we want to eliminate when we can.) Fixes ticket 4195 and Coverity 24674 CID 448. 24675 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620. 24676 - Move last_reachable and testing_since from routerinfo_t to node_t. 24677 Implements ticket 5529. 24678 - Add replaycache_t structure, functions and unit tests, then refactor 24679 rend_service_introduce() to be more clear to read, improve, debug, 24680 and test. Resolves bug 6177. 24681 - Finally remove support for malloc_good_size and malloc_usable_size. 24682 We had hoped that these functions would let us eke a little more 24683 memory out of our malloc implementation. Unfortunately, the only 24684 implementations that provided these functions are also ones that 24685 are already efficient about not overallocation: they never got us 24686 more than 7 or so bytes per allocation. Removing them saves us a 24687 little code complexity and a nontrivial amount of build complexity. 24688 24689 o New requirements: 24690 - Tor maintainers now require Automake version 1.9 or later to build 24691 Tor from the Git repository. (Automake is not required when building 24692 from a source distribution.) 24693 24694 24695Changes in version 0.2.3.21-rc - 2012-09-05 24696 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x 24697 series. It fixes a trio of potential security bugs, fixes a bug where 24698 we were leaving some of the fast relays out of the microdescriptor 24699 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly, 24700 and cleans up other smaller issues. 24701 24702 o Major bugfixes (security): 24703 - Tear down the circuit if we get an unexpected SENDME cell. Clients 24704 could use this trick to make their circuits receive cells faster 24705 than our flow control would have allowed, or to gum up the network, 24706 or possibly to do targeted memory denial-of-service attacks on 24707 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor -- 24708 from July 2002, before the release of Tor 0.0.0. We had committed 24709 this patch previously, but we had to revert it because of bug 6271. 24710 Now that 6271 is fixed, this patch appears to work. 24711 - Reject any attempt to extend to an internal address. Without 24712 this fix, a router could be used to probe addresses on an internal 24713 network to see whether they were accepting connections. Fixes bug 24714 6710; bugfix on 0.0.8pre1. 24715 - Do not crash when comparing an address with port value 0 to an 24716 address policy. This bug could have been used to cause a remote 24717 assertion failure by or against directory authorities, or to 24718 allow some applications to crash clients. Fixes bug 6690; bugfix 24719 on 0.2.1.10-alpha. 24720 24721 o Major bugfixes: 24722 - Remove the upper bound on microdescriptor length. We were hitting 24723 the limit for routers with complex exit policies or family 24724 declarations, causing clients to not use them. Fixes the first 24725 piece of bug 6404; fix on 0.2.2.6-alpha. 24726 - Detect "ORPort 0" as meaning, uniformly, that we're not running 24727 as a relay. Previously, some of our code would treat the presence 24728 of any ORPort line as meaning that we should act like a relay, 24729 even though our new listener code would correctly not open any 24730 ORPorts for ORPort 0. Similar bugs in other Port options are also 24731 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha. 24732 24733 o Minor bugfixes: 24734 - Avoid a pair of double-free and use-after-mark bugs that can 24735 occur with certain timings in canceled and re-received DNS 24736 requests. Fixes bug 6472; bugfix on 0.0.7rc1. 24737 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc. 24738 Fixes bug 6379. Bugfix on 0.2.0.20-rc. 24739 - Allow one-hop directory fetching circuits the full "circuit build 24740 timeout" period, rather than just half of it, before failing them 24741 and marking the relay down. This fix should help reduce cases where 24742 clients declare relays (or worse, bridges) unreachable because 24743 the TLS handshake takes a few seconds to complete. Fixes bug 6743; 24744 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static 24745 30 seconds. 24746 - Authorities no longer include any router in their microdescriptor 24747 consensuses for which they couldn't generate or agree on a 24748 microdescriptor. Fixes the second piece of bug 6404; fix on 24749 0.2.2.6-alpha. 24750 - Detect and reject attempts to specify both "FooPort" and 24751 "FooPort 0" in the same configuration domain. (It's still okay 24752 to have a FooPort in your configuration file, and use "FooPort 0" 24753 on the command line to disable it.) Fixes the second half of bug 24754 6507; bugfix on 0.2.3.3-alpha. 24755 - Make wildcarded addresses (that is, ones beginning with "*.") work 24756 when provided via the controller's MapAddress command. Previously, 24757 they were accepted, but we never actually noticed that they were 24758 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha. 24759 - Avoid crashing on a malformed state file where EntryGuardPathBias 24760 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta. 24761 - Add a (probably redundant) memory clear between iterations of 24762 the router status voting loop, to prevent future coding errors 24763 where data might leak between iterations of the loop. Resolves 24764 ticket 6514. 24765 24766 o Minor bugfixes (log messages): 24767 - Downgrade "set buildtimeout to low value" messages to "info" 24768 severity; they were never an actual problem, there was never 24769 anything reasonable to do about them, and they tended to spam logs 24770 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha. 24771 - Downgrade path-bias warning messages to "info". We'll try to get 24772 them working better in 0.2.4. Add internal circuit construction 24773 state to protect against the noisy warn message "Unexpectedly high 24774 circuit_successes". Also add some additional rate-limited notice 24775 messages to help determine the root cause of the warn. Fixes bug 24776 6475. Bugfix against 0.2.3.17-beta. 24777 - Move log message when unable to find a microdesc in a routerstatus 24778 entry to parse time. Previously we'd spam this warning every time 24779 we tried to figure out which microdescriptors to download. Fixes 24780 the third piece of bug 6404; fix on 0.2.3.18-rc. 24781 24782 o Minor features: 24783 - Consider new, removed or changed IPv6 OR ports a non-cosmetic 24784 change when the authority is deciding whether to accept a newly 24785 uploaded descriptor. Implements ticket 6423. 24786 - Add missing documentation for consensus and microdesc files. 24787 Resolves ticket 6732. 24788 24789 24790Changes in version 0.2.2.38 - 2012-08-12 24791 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing 24792 attack that could in theory leak path information. 24793 24794 o Security fixes: 24795 - Avoid an uninitialized memory read when reading a vote or consensus 24796 document that has an unrecognized flavor name. This read could 24797 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha. 24798 - Try to leak less information about what relays a client is 24799 choosing to a side-channel attacker. Previously, a Tor client would 24800 stop iterating through the list of available relays as soon as it 24801 had chosen one, thus finishing a little earlier when it picked 24802 a router earlier in the list. If an attacker can recover this 24803 timing information (nontrivial but not proven to be impossible), 24804 they could learn some coarse-grained information about which relays 24805 a client was picking (middle nodes in particular are likelier to 24806 be affected than exits). The timing attack might be mitigated by 24807 other factors (see bug 6537 for some discussion), but it's best 24808 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1. 24809 24810 24811Changes in version 0.2.3.20-rc - 2012-08-05 24812 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x 24813 series. It fixes a pair of code security bugs and a potential anonymity 24814 issue, updates our RPM spec files, and cleans up other smaller issues. 24815 24816 o Security fixes: 24817 - Avoid read-from-freed-memory and double-free bugs that could occur 24818 when a DNS request fails while launching it. Fixes bug 6480; 24819 bugfix on 0.2.0.1-alpha. 24820 - Avoid an uninitialized memory read when reading a vote or consensus 24821 document that has an unrecognized flavor name. This read could 24822 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha. 24823 - Try to leak less information about what relays a client is 24824 choosing to a side-channel attacker. Previously, a Tor client would 24825 stop iterating through the list of available relays as soon as it 24826 had chosen one, thus finishing a little earlier when it picked 24827 a router earlier in the list. If an attacker can recover this 24828 timing information (nontrivial but not proven to be impossible), 24829 they could learn some coarse-grained information about which relays 24830 a client was picking (middle nodes in particular are likelier to 24831 be affected than exits). The timing attack might be mitigated by 24832 other factors (see bug 6537 for some discussion), but it's best 24833 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1. 24834 24835 o Minor features: 24836 - Try to make the warning when giving an obsolete SOCKSListenAddress 24837 a little more useful. 24838 - Terminate active server managed proxies if Tor stops being a 24839 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha. 24840 - Provide a better error message about possible OSX Asciidoc failure 24841 reasons. Fixes bug 6436. 24842 - Warn when Tor is configured to use accounting in a way that can 24843 link a hidden service to some other hidden service or public 24844 address. Resolves ticket 6490. 24845 24846 o Minor bugfixes: 24847 - Check return value of fputs() when writing authority certificate 24848 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha. 24849 - Ignore ServerTransportPlugin lines when Tor is not configured as 24850 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha. 24851 - When disabling guards for having too high a proportion of failed 24852 circuits, make sure to look at each guard. Fixes bug 6397; bugfix 24853 on 0.2.3.17-beta. 24854 24855 o Packaging (RPM): 24856 - Update our default RPM spec files to work with mock and rpmbuild 24857 on RHEL/Fedora. They have an updated set of dependencies and 24858 conflicts, a fix for an ancient typo when creating the "_tor" 24859 user, and better instructions. Thanks to Ondrej Mikle for the 24860 patch series. Fixes bug 6043. 24861 24862 o Testing: 24863 - Make it possible to set the TestingTorNetwork configuration 24864 option using AlternateDirAuthority and AlternateBridgeAuthority 24865 as an alternative to setting DirServer. Addresses ticket 6377. 24866 24867 o Documentation: 24868 - Clarify the documentation for the Alternate*Authority options. 24869 Fixes bug 6387. 24870 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500. 24871 24872 o Code simplification and refactoring: 24873 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds 24874 10 lines. Also, don't nest them. Doing so in the past has 24875 led to hard-to-debug code. The new style is to use the 24876 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400. 24877 24878 24879Changes in version 0.2.3.19-rc - 2012-07-06 24880 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x 24881 series. It fixes the compile on Windows, reverts to a GeoIP database 24882 that isn't as broken, and fixes a flow control bug that has been around 24883 since the beginning of Tor. 24884 24885 o Major bugfixes: 24886 - Fix a bug handling SENDME cells on nonexistent streams that could 24887 result in bizarre window values. Report and patch contributed 24888 pseudonymously. Fixes part of bug 6271. This bug was introduced 24889 before the first Tor release, in svn commit r152. 24890 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the 24891 June 2012 database, Maxmind marked many Tor relays as country "A1", 24892 which will cause risky behavior for clients that set EntryNodes 24893 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta. 24894 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation 24895 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc. 24896 24897 o Minor bugfixes: 24898 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218; 24899 bugfix on 0.2.1.10-alpha. 24900 24901 24902Changes in version 0.2.3.18-rc - 2012-06-28 24903 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x 24904 series. It fixes a few smaller bugs, but generally appears stable. 24905 Please test it and let us know whether it is! 24906 24907 o Major bugfixes: 24908 - Allow wildcarded mapaddress targets to be specified on the 24909 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha. 24910 - Make our linker option detection code more robust against linkers 24911 such as on FreeBSD 8, where a bad combination of options completes 24912 successfully but makes an unrunnable binary. Fixes bug 6173; 24913 bugfix on 0.2.3.17-beta. 24914 24915 o Minor bugfixes (on 0.2.2.x and earlier): 24916 - Avoid a false positive in the util/threads unit test by increasing 24917 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha. 24918 - Replace "Sending publish request" log messages with "Launching 24919 upload", so that they no longer confusingly imply that we're 24920 sending something to a directory we might not even be connected 24921 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha. 24922 - Make sure to set *socket_error in all error cases in 24923 connection_connect(), so it can't produce a warning about 24924 errno being zero from errno_to_orconn_end_reason(). Bugfix on 24925 0.2.1.1-alpha; resolves ticket 6028. 24926 - Downgrade "Got a certificate, but we already have it" log messages 24927 from warning to info, except when we're a dirauth. Fixes bug 5238; 24928 bugfix on 0.2.1.7-alpha. 24929 - When checking for requested signatures on the latest consensus 24930 before serving it to a client, make sure to check the right 24931 consensus flavor. Bugfix on 0.2.2.6-alpha. 24932 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN. 24933 Fixes bug 5932; bugfix on 0.2.2.7-alpha. 24934 24935 o Minor bugfixes (on 0.2.3.x): 24936 - Make format_helper_exit_status() avoid unnecessary space padding 24937 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix 24938 on 0.2.3.1-alpha. 24939 - Downgrade a message about cleaning the microdescriptor cache to 24940 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha. 24941 - Log a BUG message at severity INFO if we have a networkstatus with 24942 a missing entry for some microdescriptor. Continues on a patch 24943 to 0.2.3.2-alpha. 24944 - Improve the log message when a managed proxy fails to launch. Fixes 24945 bug 5099; bugfix on 0.2.3.6-alpha. 24946 - Don't do DNS lookups when parsing corrupted managed proxy protocol 24947 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha. 24948 - When formatting wildcarded address mappings for the controller, 24949 be sure to include "*." as appropriate. Partially fixes bug 6244; 24950 bugfix on 0.2.3.9-alpha. 24951 - Avoid a warning caused by using strcspn() from glibc with clang 3.0. 24952 Bugfix on 0.2.3.13-alpha. 24953 - Stop logging messages about running with circuit timeout learning 24954 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta. 24955 - Disable a spurious warning about reading on a marked and flushing 24956 connection. We shouldn't be doing that, but apparently we 24957 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta. 24958 - Fix a bug that stopped AllowDotExit from working on addresses 24959 that had an entry in the DNS cache. Fixes bug 6211; bugfix on 24960 0.2.3.17-beta. 24961 24962 o Code simplification, refactoring, unit tests: 24963 - Move tor_gettimeofday_cached() into compat_libevent.c, and use 24964 Libevent's notion of cached time when possible. 24965 - Remove duplicate code for invoking getrlimit() from control.c. 24966 - Add a unit test for the environment_variable_names_equal function. 24967 24968 o Documentation: 24969 - Document the --defaults-torrc option, and the new (in 0.2.3) 24970 semantics for overriding, extending, and clearing lists of 24971 options. Closes bug 4748. 24972 24973 24974Changes in version 0.2.3.17-beta - 2012-06-15 24975 Tor 0.2.3.17-beta enables compiler and linker hardening by default, 24976 gets our TLS handshake back on track for being able to blend in with 24977 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction 24978 with Vidalia, and otherwise continues to get us closer to a release 24979 candidate. 24980 24981 o Major features: 24982 - Enable gcc and ld hardening by default. Resolves ticket 5210. 24983 - Update TLS cipher list to match Firefox 8 and later. Resolves 24984 ticket 4744. 24985 - Implement the client side of proposal 198: remove support for 24986 clients falsely claiming to support standard ciphersuites that 24987 they can actually provide. As of modern OpenSSL versions, it's not 24988 necessary to fake any standard ciphersuite, and doing so prevents 24989 us from using better ciphersuites in the future, since servers 24990 can't know whether an advertised ciphersuite is really supported or 24991 not. Some hosts -- notably, ones with very old versions of OpenSSL 24992 or where OpenSSL has been built with ECC disabled -- will stand 24993 out because of this change; TBB users should not be affected. 24994 24995 o Major bugfixes: 24996 - Change the default value for DynamicDHGroups (introduced in 24997 0.2.3.9-alpha) to 0. This feature can make Tor relays less 24998 identifiable by their use of the mod_ssl DH group, but at 24999 the cost of some usability (#4721) and bridge tracing (#6087) 25000 regressions. Resolves ticket 5598. 25001 - Send a CRLF at the end of each STATUS_* control protocol event. This 25002 bug tickled a bug in Vidalia which would make it freeze. Fixes 25003 bug 6094; bugfix on 0.2.3.16-alpha. 25004 25005 o Minor bugfixes: 25006 - Disable writing on marked-for-close connections when they are 25007 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes 25008 bug 5263; bugfix on 0.0.2pre13, where we first added a special 25009 case for flushing marked connections. 25010 - Detect SSL handshake even when the initial attempt to write the 25011 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha. 25012 - Change the AllowDotExit rules so they should actually work. 25013 We now enforce AllowDotExit only immediately after receiving an 25014 address via SOCKS or DNSPort: other sources are free to provide 25015 .exit addresses after the resolution occurs. Fixes bug 3940; 25016 bugfix on 0.2.2.1-alpha. 25017 - Fix a (harmless) integer overflow in cell statistics reported by 25018 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha. 25019 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the 25020 right places and never depends on the consensus parameters or 25021 computes adaptive timeouts when it is disabled. Fixes bug 5049; 25022 bugfix on 0.2.2.14-alpha. 25023 - When building Tor on Windows with -DUNICODE (not default), ensure 25024 that error messages, filenames, and DNS server names are always 25025 NUL-terminated when we convert them to a single-byte encoding. 25026 Fixes bug 5909; bugfix on 0.2.2.16-alpha. 25027 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined. 25028 Fixes bug 6097; bugfix on 0.2.2.16-alpha. 25029 - Fix an edge case where TestingTorNetwork is set but the authorities 25030 and relays all have an uptime of zero, where the private Tor network 25031 could briefly lack support for hidden services. Fixes bug 3886; 25032 bugfix on 0.2.2.18-alpha. 25033 - Correct the manpage's descriptions for the default values of 25034 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix 25035 on 0.2.3.1-alpha. 25036 - Fix the documentation for the --hush and --quiet command line 25037 options, which changed their behavior back in 0.2.3.3-alpha. 25038 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on 25039 0.2.3.11-alpha. 25040 25041 o Minor features: 25042 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add 25043 more information to it, so that we can track it down in case it 25044 returns again. Mitigates bug 5235. 25045 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in 25046 options_validate(); warn if LearnCircuitBuildTimeout is disabled and 25047 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452. 25048 - Warn the user when HTTPProxy, but no other proxy type, is 25049 configured. This can cause surprising behavior: it doesn't send 25050 all of Tor's traffic over the HTTPProxy -- it sends unencrypted 25051 directory traffic only. Resolves ticket 4663. 25052 - Issue a notice if a guard completes less than 40% of your circuits. 25053 Threshold is configurable by torrc option PathBiasNoticeRate and 25054 consensus parameter pb_noticepct. There is additional, off-by- 25055 default code to disable guards which fail too many circuits. 25056 Addresses ticket 5458. 25057 - Update to the June 6 2012 Maxmind GeoLite Country database. 25058 25059 o Code simplifications and refactoring: 25060 - Remove validate_pluggable_transports_config(): its warning 25061 message is now handled by connection_or_connect(). 25062 25063 25064Changes in version 0.2.2.37 - 2012-06-06 25065 Tor 0.2.2.37 introduces a workaround for a critical renegotiation 25066 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself 25067 currently). 25068 25069 o Major bugfixes: 25070 - Work around a bug in OpenSSL that broke renegotiation with TLS 25071 1.1 and TLS 1.2. Without this workaround, all attempts to speak 25072 the v2 Tor connection protocol when both sides were using OpenSSL 25073 1.0.1 would fail. Resolves ticket 6033. 25074 - When waiting for a client to renegotiate, don't allow it to add 25075 any bytes to the input buffer. This fixes a potential DoS issue. 25076 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc. 25077 - Fix an edge case where if we fetch or publish a hidden service 25078 descriptor, we might build a 4-hop circuit and then use that circuit 25079 for exiting afterwards -- even if the new last hop doesn't obey our 25080 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha. 25081 25082 o Minor bugfixes: 25083 - Fix a build warning with Clang 3.1 related to our use of vasprintf. 25084 Fixes bug 5969. Bugfix on 0.2.2.11-alpha. 25085 25086 o Minor features: 25087 - Tell GCC and Clang to check for any errors in format strings passed 25088 to the tor_v*(print|scan)f functions. 25089 25090 25091Changes in version 0.2.3.16-alpha - 2012-06-05 25092 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation 25093 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself 25094 currently). It also fixes a variety of smaller bugs and other cleanups 25095 that get us closer to a release candidate. 25096 25097 o Major bugfixes (general): 25098 - Work around a bug in OpenSSL that broke renegotiation with TLS 25099 1.1 and TLS 1.2. Without this workaround, all attempts to speak 25100 the v2 Tor connection protocol when both sides were using OpenSSL 25101 1.0.1 would fail. Resolves ticket 6033. 25102 - When waiting for a client to renegotiate, don't allow it to add 25103 any bytes to the input buffer. This fixes a potential DoS issue. 25104 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc. 25105 - Pass correct OR address to managed proxies (like obfsproxy), 25106 even when ORListenAddress is used. Fixes bug 4865; bugfix on 25107 0.2.3.9-alpha. 25108 - The advertised platform of a router now includes only its operating 25109 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its 25110 service pack level (for Windows) or its CPU architecture (for Unix). 25111 We also no longer include the "git-XYZ" tag in the version. Resolves 25112 part of bug 2988. 25113 25114 o Major bugfixes (clients): 25115 - If we are unable to find any exit that supports our predicted ports, 25116 stop calling them predicted, so that we don't loop and build 25117 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6, 25118 which introduced predicted ports. 25119 - Fix an edge case where if we fetch or publish a hidden service 25120 descriptor, we might build a 4-hop circuit and then use that circuit 25121 for exiting afterwards -- even if the new last hop doesn't obey our 25122 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha. 25123 - Check at each new consensus whether our entry guards were picked 25124 long enough ago that we should rotate them. Previously, we only 25125 did this check at startup, which could lead to us holding a guard 25126 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc. 25127 - When fetching a bridge descriptor from a bridge authority, 25128 always do so anonymously, whether we have been able to open 25129 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha. 25130 This behavior makes it *safer* to use UpdateBridgesFromAuthority, 25131 but we'll need to wait for bug 6010 before it's actually usable. 25132 25133 o Major bugfixes (directory authorities): 25134 - When computing weight parameters, behave more robustly in the 25135 presence of a bad bwweightscale value. Previously, the authorities 25136 would crash if they agreed on a sufficiently broken weight_scale 25137 value: now, they use a reasonable default and carry on. Partial 25138 fix for 5786; bugfix on 0.2.2.17-alpha. 25139 - Check more thoroughly to prevent a rogue authority from 25140 double-voting on any consensus directory parameter. Previously, 25141 authorities would crash in this case if the total number of 25142 votes for any parameter exceeded the number of active voters, 25143 but would let it pass otherwise. Partial fix for bug 5786; bugfix 25144 on 0.2.2.2-alpha. 25145 25146 o Minor features: 25147 - Rate-limit log messages when asked to connect anonymously to 25148 a private address. When these hit, they tended to hit fast and 25149 often. Also, don't bother trying to connect to addresses that we 25150 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory 25151 reply makes us think we have been lied to, even when the address the 25152 client tried to connect to was "localhost." Resolves ticket 2822. 25153 - Allow packagers to insert an extra string in server descriptor 25154 platform lines by setting the preprocessor variable TOR_BUILD_TAG. 25155 Resolves the rest of ticket 2988. 25156 - Raise the threshold of server descriptors needed (75%) and exit 25157 server descriptors needed (50%) before we will declare ourselves 25158 bootstrapped. This will make clients start building circuits a 25159 little later, but makes the initially constructed circuits less 25160 skewed and less in conflict with further directory fetches. Fixes 25161 ticket 3196. 25162 - Close any connection that sends unrecognized junk before the 25163 handshake. Solves an issue noted in bug 4369. 25164 - Improve log messages about managed transports. Resolves ticket 5070. 25165 - Tag a bridge's descriptor as "never to be sent unencrypted". 25166 This shouldn't matter, since bridges don't open non-anonymous 25167 connections to the bridge authority and don't allow unencrypted 25168 directory connections from clients, but we might as well make 25169 sure. Closes bug 5139. 25170 - Expose our view of whether we have gone dormant to the controller, 25171 via a new "GETINFO dormant" value. Torbutton and other controllers 25172 can use this to avoid doing periodic requests through Tor while 25173 it's dormant (bug 4718). Fixes bug 5954. 25174 - Tell GCC and Clang to check for any errors in format strings passed 25175 to the tor_v*(print|scan)f functions. 25176 - Update to the May 1 2012 Maxmind GeoLite Country database. 25177 25178 o Minor bugfixes (already included in 0.2.2.36): 25179 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time(). 25180 Fixes bug 5346; bugfix on 0.0.8pre3. 25181 - Correct parsing of certain date types in parse_http_time(). 25182 Without this patch, If-Modified-Since would behave 25183 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from 25184 Esteban Manchado Velázques. 25185 - Make our number-parsing functions always treat too-large values 25186 as an error, even when those values exceed the width of the 25187 underlying type. Previously, if the caller provided these 25188 functions with minima or maxima set to the extreme values of the 25189 underlying integer type, these functions would return those 25190 values on overflow rather than treating overflow as an error. 25191 Fixes part of bug 5786; bugfix on 0.0.9. 25192 - If we hit the error case where routerlist_insert() replaces an 25193 existing (old) server descriptor, make sure to remove that 25194 server descriptor from the old_routers list. Fix related to bug 25195 1776. Bugfix on 0.2.2.18-alpha. 25196 - Clarify the behavior of MaxCircuitDirtiness with hidden service 25197 circuits. Fixes issue 5259. 25198 25199 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier): 25200 - Prevent a null-pointer dereference when receiving a data cell 25201 for a nonexistent stream when the circuit in question has an 25202 empty deliver window. We don't believe this is triggerable, 25203 since we don't currently allow deliver windows to become empty, 25204 but the logic is tricky enough that it's better to make the code 25205 robust. Fixes bug 5541; bugfix on 0.0.2pre14. 25206 - Fix a memory leak when trying to launch a DNS request when the 25207 network is disabled or the nameservers are unconfigurable. Fixes 25208 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable 25209 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case). 25210 - Don't hold a Windows file handle open for every file mapping; 25211 the file mapping handle is sufficient. Fixes bug 5951; bugfix on 25212 0.1.2.1-alpha. 25213 - Avoid O(n^2) performance characteristics when parsing a large 25214 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha. 25215 - Format more doubles with %f, not %lf. Patch from grarpamp to make 25216 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on 25217 Tor 0.2.0.8-alpha. 25218 - Make our replacement implementation of strtok_r() compatible with 25219 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091; 25220 bugfix on 0.2.2.1-alpha. 25221 - Fix a NULL-pointer dereference on a badly formed 25222 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796; 25223 bugfix on 0.2.2.9-alpha. 25224 - Fix a build warning with Clang 3.1 related to our use of vasprintf. 25225 Fixes bug 5969. Bugfix on 0.2.2.11-alpha. 25226 - Defensively refactor rend_mid_rendezvous() so that protocol 25227 violations and length checks happen in the beginning. Fixes 25228 bug 5645. 25229 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so 25230 that IPv6 stuff will compile on MSVC, and compilation issues 25231 will be easier to track down. Fixes bug 5861. 25232 25233 o Minor bugfixes (correctness, on 0.2.2.x and earlier): 25234 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as 25235 resource exhaustion, so that clients can adjust their load to 25236 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which 25237 started using END_STREAM_REASON_RESOURCELIMIT. 25238 - Don't check for whether the address we're using for outbound 25239 connections has changed until after the outbound connection has 25240 completed. On Windows, getsockname() doesn't succeed until the 25241 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha. 25242 - If the configuration tries to set MyFamily on a bridge, refuse to 25243 do so, and warn about the security implications. Fixes bug 4657; 25244 bugfix on 0.2.0.3-alpha. 25245 - If the client fails to set a reasonable set of ciphersuites 25246 during its v2 handshake renegotiation, allow the renegotiation to 25247 continue nevertheless (i.e. send all the required certificates). 25248 Fixes bug 4591; bugfix on 0.2.0.20-rc. 25249 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP 25250 option is set to 0 (which Vidalia version 0.2.16 now does when 25251 a SAVECONF attempt fails), perform other actions that SIGHUP 25252 usually causes (like reopening the logs). Fixes bug 5095; bugfix 25253 on 0.2.1.9-alpha. 25254 - If we fail to write a microdescriptor to the disk cache, do not 25255 continue replacing the old microdescriptor file. Fixes bug 2954; 25256 bugfix on 0.2.2.6-alpha. 25257 - Exit nodes don't need to fetch certificates for authorities that 25258 they don't recognize; only directory authorities, bridges, 25259 and caches need to do that. Fixes part of bug 2297; bugfix on 25260 0.2.2.11-alpha. 25261 - Correctly handle checking the permissions on the parent 25262 directory of a control socket in the root directory. Bug found 25263 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor 25264 0.2.2.26-beta. 25265 - When told to add a bridge with the same digest as a preexisting 25266 bridge but a different addr:port, change the addr:port as 25267 requested. Previously we would not notice the change. Fixes half 25268 of bug 5603; fix on 0.2.2.26-beta. 25269 - End AUTHCHALLENGE error messages (in the control protocol) with 25270 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha. 25271 25272 o Minor bugfixes (on 0.2.3.x): 25273 - Turn an assertion (that the number of handshakes received as a 25274 server is not < 1) into a warning. Fixes bug 4873; bugfix on 25275 0.2.3.1-alpha. 25276 - Format IPv4 addresses correctly in ADDRMAP events. (Previously, 25277 we had reversed them when the answer was cached.) Fixes bug 25278 5723; bugfix on 0.2.3.1-alpha. 25279 - Work correctly on Linux systems with accept4 support advertised in 25280 their headers, but without accept4 support in the kernel. Fix 25281 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha. 25282 - When told to add a bridge with the same addr:port as a preexisting 25283 bridge but a different transport, change the transport as 25284 requested. Previously we would not notice the change. Fixes half 25285 of bug 5603; fix on 0.2.3.2-alpha. 25286 - Avoid a "double-reply" warning when replying to a SOCKS request 25287 with a parse error. Patch from Fabian Keil. Fixes bug 4108; 25288 bugfix on 0.2.3.4-alpha. 25289 - Fix a bug where a bridge authority crashes if it has seen no 25290 directory requests when it's time to write statistics to disk. 25291 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in 25292 a better way. 25293 - Don't try to open non-control listeners when DisableNetwork is set. 25294 Previously, we'd open all listeners, then immediately close them. 25295 Fixes bug 5604; bugfix on 0.2.3.9-alpha. 25296 - Don't abort the managed proxy protocol if the managed proxy 25297 sends us an unrecognized line; ignore it instead. Fixes bug 25298 5910; bugfix on 0.2.3.9-alpha. 25299 - Fix a compile warning in crypto.c when compiling with clang 3.1. 25300 Fixes bug 5969, bugfix on 0.2.3.9-alpha. 25301 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX. 25302 Fixes bug 5355; bugfix on 0.2.3.11-alpha. 25303 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to 25304 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha. 25305 - Resolve numerous small warnings and build issues with MSVC. Resolves 25306 bug 5859. 25307 25308 o Documentation fixes: 25309 - Improve the manual's documentation for the NT Service command-line 25310 options. Addresses ticket 3964. 25311 - Clarify SessionGroup documentation slightly; resolves ticket 5437. 25312 - Document the changes to the ORPort and DirPort options, and the 25313 fact that {OR/Dir}ListenAddress is now unnecessary (and 25314 therefore deprecated). Resolves ticket 5597. 25315 25316 o Removed files: 25317 - Remove the torrc.bridge file: we don't use it for anything, and 25318 it had become badly desynchronized from torrc.sample. Resolves 25319 bug 5622. 25320 25321 25322Changes in version 0.2.2.36 - 2012-05-24 25323 Tor 0.2.2.36 updates the addresses for two of the eight directory 25324 authorities, fixes some potential anonymity and security issues, 25325 and fixes several crash bugs. 25326 25327 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many 25328 known flaws, and nobody should be using them. You should upgrade. If 25329 you're using a Linux or BSD and its packages are obsolete, stop using 25330 those packages and upgrade anyway. 25331 25332 o Directory authority changes: 25333 - Change IP address for maatuska (v3 directory authority). 25334 - Change IP address for ides (v3 directory authority), and rename 25335 it to turtles. 25336 25337 o Security fixes: 25338 - When building or running with any version of OpenSSL earlier 25339 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL 25340 versions have a bug (CVE-2011-4576) in which their block cipher 25341 padding includes uninitialized data, potentially leaking sensitive 25342 information to any peer with whom they make a SSLv3 connection. Tor 25343 does not use SSL v3 by default, but a hostile client or server 25344 could force an SSLv3 connection in order to gain information that 25345 they shouldn't have been able to get. The best solution here is to 25346 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building 25347 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely 25348 to make sure that the bug can't happen. 25349 - Never use a bridge or a controller-supplied node as an exit, even 25350 if its exit policy allows it. Found by wanoskarnet. Fixes bug 25351 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors) 25352 and 0.2.0.3-alpha (for bridge-purpose descriptors). 25353 - Only build circuits if we have a sufficient threshold of the total 25354 descriptors that are marked in the consensus with the "Exit" 25355 flag. This mitigates an attack proposed by wanoskarnet, in which 25356 all of a client's bridges collude to restrict the exit nodes that 25357 the client knows about. Fixes bug 5343. 25358 - Provide controllers with a safer way to implement the cookie 25359 authentication mechanism. With the old method, if another locally 25360 running program could convince a controller that it was the Tor 25361 process, then that program could trick the controller into telling 25362 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE" 25363 authentication method uses a challenge-response approach to prevent 25364 this attack. Fixes bug 5185; implements proposal 193. 25365 25366 o Major bugfixes: 25367 - Avoid logging uninitialized data when unable to decode a hidden 25368 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha. 25369 - Avoid a client-side assertion failure when receiving an INTRODUCE2 25370 cell on a general purpose circuit. Fixes bug 5644; bugfix on 25371 0.2.1.6-alpha. 25372 - Fix builds when the path to sed, openssl, or sha1sum contains 25373 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix 25374 on 0.2.2.1-alpha. 25375 - Correct our replacements for the timeradd() and timersub() functions 25376 on platforms that lack them (for example, Windows). The timersub() 25377 function is used when expiring circuits, while timeradd() is 25378 currently unused. Bug report and patch by Vektor. Fixes bug 4778; 25379 bugfix on 0.2.2.24-alpha. 25380 - Fix the SOCKET_OK test that we use to tell when socket 25381 creation fails so that it works on Win64. Fixes part of bug 4533; 25382 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet. 25383 25384 o Minor bugfixes: 25385 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time(). 25386 Fixes bug 5346; bugfix on 0.0.8pre3. 25387 - Make our number-parsing functions always treat too-large values 25388 as an error, even when those values exceed the width of the 25389 underlying type. Previously, if the caller provided these 25390 functions with minima or maxima set to the extreme values of the 25391 underlying integer type, these functions would return those 25392 values on overflow rather than treating overflow as an error. 25393 Fixes part of bug 5786; bugfix on 0.0.9. 25394 - Older Linux kernels erroneously respond to strange nmap behavior 25395 by having accept() return successfully with a zero-length 25396 socket. When this happens, just close the connection. Previously, 25397 we would try harder to learn the remote address: but there was 25398 no such remote address to learn, and our method for trying to 25399 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix 25400 on 0.1.0.3-rc. Reported and diagnosed by "r1eo". 25401 - Correct parsing of certain date types in parse_http_time(). 25402 Without this patch, If-Modified-Since would behave 25403 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from 25404 Esteban Manchado Velázques. 25405 - Change the BridgePassword feature (part of the "bridge community" 25406 design, which is not yet implemented) to use a time-independent 25407 comparison. The old behavior might have allowed an adversary 25408 to use timing to guess the BridgePassword value. Fixes bug 5543; 25409 bugfix on 0.2.0.14-alpha. 25410 - Detect and reject certain misformed escape sequences in 25411 configuration values. Previously, these values would cause us 25412 to crash if received in a torrc file or over an authenticated 25413 control port. Bug found by Esteban Manchado Velázquez, and 25414 independently by Robert Connolly from Matta Consulting who further 25415 noted that it allows a post-authentication heap overflow. Patch 25416 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668); 25417 bugfix on 0.2.0.16-alpha. 25418 - Fix a compile warning when using the --enable-openbsd-malloc 25419 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc. 25420 - During configure, detect when we're building with clang version 25421 3.0 or lower and disable the -Wnormalized=id and -Woverride-init 25422 CFLAGS. clang doesn't support them yet. 25423 - When sending an HTTP/1.1 proxy request, include a Host header. 25424 Fixes bug 5593; bugfix on 0.2.2.1-alpha. 25425 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE 25426 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha. 25427 - If we hit the error case where routerlist_insert() replaces an 25428 existing (old) server descriptor, make sure to remove that 25429 server descriptor from the old_routers list. Fix related to bug 25430 1776. Bugfix on 0.2.2.18-alpha. 25431 25432 o Minor bugfixes (documentation and log messages): 25433 - Fix a typo in a log message in rend_service_rendezvous_has_opened(). 25434 Fixes bug 4856; bugfix on Tor 0.0.6. 25435 - Update "ClientOnly" man page entry to explain that there isn't 25436 really any point to messing with it. Resolves ticket 5005. 25437 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays 25438 directory authority option (introduced in Tor 0.2.2.34). 25439 - Downgrade the "We're missing a certificate" message from notice 25440 to info: people kept mistaking it for a real problem, whereas it 25441 is seldom the problem even when we are failing to bootstrap. Fixes 25442 bug 5067; bugfix on 0.2.0.10-alpha. 25443 - Correctly spell "connect" in a log message on failure to create a 25444 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta. 25445 - Clarify the behavior of MaxCircuitDirtiness with hidden service 25446 circuits. Fixes issue 5259. 25447 25448 o Minor features: 25449 - Directory authorities now reject versions of Tor older than 25450 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha 25451 inclusive. These versions accounted for only a small fraction of 25452 the Tor network, and have numerous known security issues. Resolves 25453 issue 4788. 25454 - Update to the May 1 2012 Maxmind GeoLite Country database. 25455 25456 o Feature removal: 25457 - When sending or relaying a RELAY_EARLY cell, we used to convert 25458 it to a RELAY cell if the connection was using the v1 link 25459 protocol. This was a workaround for older versions of Tor, which 25460 didn't handle RELAY_EARLY cells properly. Now that all supported 25461 versions can handle RELAY_EARLY cells, and now that we're enforcing 25462 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule, 25463 remove this workaround. Addresses bug 4786. 25464 25465 25466Changes in version 0.2.3.15-alpha - 2012-04-30 25467 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making 25468 the development branch build on Windows again. 25469 25470 o Minor bugfixes (on 0.2.2.x and earlier): 25471 - Make sure that there are no unhandled pending TLS errors before 25472 reading from a TLS stream. We had checks in 0.1.0.3-rc, but 25473 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls(). 25474 Bugfix on 0.1.0.5-rc; fixes bug 4528. 25475 - Fix an assert that directory authorities could trigger on sighup 25476 during some configuration state transitions. We now don't treat 25477 it as a fatal error when the new descriptor we just generated in 25478 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha. 25479 - After we pick a directory mirror, we would refuse to use it if 25480 it's in our ExcludeExitNodes list, resulting in mysterious failures 25481 to bootstrap for people who just wanted to avoid exiting from 25482 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha. 25483 - When building with --enable-static-tor on OpenBSD, do not 25484 erroneously attempt to link -lrt. Fixes bug 5103. 25485 25486 o Minor bugfixes (on 0.2.3.x): 25487 - When Tor is built with kernel headers from a recent (last few 25488 years) Linux kernel, do not fail to run on older (pre-2.6.28 25489 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha. 25490 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha 25491 and 0.2.3.12-alpha. 25492 - Fix compilation with miniupnpc version 1.6; patch from 25493 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha. 25494 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix 25495 on 0.2.3.13-alpha; found and fixed by Gisle Vanem. 25496 - Fix compilation on platforms without unistd.h, or where environ 25497 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha. 25498 25499 o Minor features: 25500 - Directory authorities are now a little more lenient at accepting 25501 older router descriptors, or newer router descriptors that don't 25502 make big changes. This should help ameliorate past and future 25503 issues where routers think they have uploaded valid descriptors, 25504 but the authorities don't think so. Fix for ticket 2479. 25505 - Make the code that clients use to detect an address change be 25506 IPv6-aware, so that it won't fill clients' logs with error 25507 messages when trying to get the IPv4 address of an IPv6 25508 connection. Implements ticket 5537. 25509 25510 o Removed features: 25511 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option; 25512 authorities needed to use it for a while to keep the network working 25513 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but 25514 that was six months ago. As of now, it should no longer be needed 25515 or used. 25516 25517 25518Changes in version 0.2.3.14-alpha - 2012-04-23 25519 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release 25520 candidate. It also dramatically speeds up AES: fast relays should 25521 consider switching to the newer OpenSSL library. 25522 25523 o Directory authority changes: 25524 - Change IP address for ides (v3 directory authority), and rename 25525 it to turtles. 25526 25527 o Major bugfixes: 25528 - Avoid logging uninitialized data when unable to decode a hidden 25529 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha. 25530 - Avoid a client-side assertion failure when receiving an INTRODUCE2 25531 cell on a general purpose circuit. Fixes bug 5644; bugfix on 25532 0.2.1.6-alpha. 25533 - If authorities are unable to get a v2 consensus document from other 25534 directory authorities, they no longer fall back to fetching 25535 them from regular directory caches. Fixes bug 5635; bugfix on 25536 0.2.2.26-beta, where routers stopped downloading v2 consensus 25537 documents entirely. 25538 - When we start a Tor client with a normal consensus already cached, 25539 be willing to download a microdescriptor consensus. Fixes bug 4011; 25540 fix on 0.2.3.1-alpha. 25541 25542 o Major features (performance): 25543 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64 25544 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or 25545 vectorized AES implementations as appropriate. These can be much, 25546 much faster than other AES implementations. 25547 25548 o Minor bugfixes (0.2.2.x and earlier): 25549 - Don't launch more than 10 service-side introduction-point circuits 25550 for a hidden service in five minutes. Previously, we would consider 25551 launching more introduction-point circuits if at least one second 25552 had passed without any introduction-point circuits failing. Fixes 25553 bug 4607; bugfix on 0.0.7pre1. 25554 - Change the BridgePassword feature (part of the "bridge community" 25555 design, which is not yet implemented) to use a time-independent 25556 comparison. The old behavior might have allowed an adversary 25557 to use timing to guess the BridgePassword value. Fixes bug 5543; 25558 bugfix on 0.2.0.14-alpha. 25559 - Enforce correct return behavior of tor_vsscanf() when the '%%' 25560 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13. 25561 - When sending an HTTP/1.1 proxy request, include a Host header. 25562 Fixes bug 5593; bugfix on 0.2.2.1-alpha. 25563 - Don't log that we have "decided to publish new relay descriptor" 25564 unless we are actually publishing a descriptor. Fixes bug 3942; 25565 bugfix on 0.2.2.28-beta. 25566 25567 o Minor bugfixes (0.2.3.x): 25568 - Fix a bug where a bridge authority crashes (on a failed assert) 25569 if it has seen no directory requests when it's time to write 25570 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha. 25571 - Fix bug stomping on ORPort option NoListen and ignoring option 25572 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha. 25573 - In the testsuite, provide a large enough buffer in the tor_sscanf 25574 unit test. Otherwise we'd overrun that buffer and crash during 25575 the unit tests. Found by weasel. Fixes bug 5449; bugfix on 25576 0.2.3.12-alpha. 25577 - Make sure we create the keys directory if it doesn't exist and we're 25578 about to store the dynamic Diffie-Hellman parameters. Fixes bug 25579 5572; bugfix on 0.2.3.13-alpha. 25580 - Fix a small memory leak when trying to decode incorrect base16 25581 authenticator during SAFECOOKIE authentication. Found by 25582 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha. 25583 25584 o Minor features: 25585 - Add more information to a log statement that might help track down 25586 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a 25587 non-IP address" messages (or any Bug messages, for that matter!), 25588 please let us know about it. 25589 - Relays now understand an IPv6 address when they get one from a 25590 directory server. Resolves ticket 4875. 25591 - Resolve IPv6 addresses in bridge and entry statistics to country 25592 code "??" which means we at least count them. Resolves ticket 5053; 25593 improves on 0.2.3.9-alpha. 25594 - Update to the April 3 2012 Maxmind GeoLite Country database. 25595 - Begin a doc/state-contents.txt file to explain the contents of 25596 the Tor state file. Fixes bug 2987. 25597 25598 o Default torrc changes: 25599 - Stop listing "socksport 9050" in torrc.sample. We open a socks 25600 port on 9050 by default anyway, so this should not change anything 25601 in practice. 25602 - Stop mentioning the deprecated *ListenAddress options in 25603 torrc.sample. Fixes bug 5438. 25604 - Document unit of bandwidth related options in sample torrc. 25605 Fixes bug 5621. 25606 25607 o Removed features: 25608 - The "torify" script no longer supports the "tsocks" socksifier 25609 tool, since tsocks doesn't support DNS and UDP right for Tor. 25610 Everyone should be using torsocks instead. Fixes bugs 3530 and 25611 5180. Based on a patch by "ugh". 25612 25613 o Code refactoring: 25614 - Change the symmetric cipher interface so that creating and 25615 initializing a stream cipher are no longer separate functions. 25616 - Remove all internal support for unpadded RSA. We never used it, and 25617 it would be a bad idea to start. 25618 25619 25620Changes in version 0.2.3.13-alpha - 2012-03-26 25621 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs 25622 in managed pluggable transports, as well as providing other cleanups 25623 that get us closer to a release candidate. 25624 25625 o Directory authority changes: 25626 - Change IP address for maatuska (v3 directory authority). 25627 25628 o Security fixes: 25629 - Provide controllers with a safer way to implement the cookie 25630 authentication mechanism. With the old method, if another locally 25631 running program could convince a controller that it was the Tor 25632 process, then that program could trick the controller into telling 25633 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE" 25634 authentication method uses a challenge-response approach to prevent 25635 this attack. Fixes bug 5185, implements proposal 193. 25636 - Never use a bridge or a controller-supplied node as an exit, even 25637 if its exit policy allows it. Found by wanoskarnet. Fixes bug 25638 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors) 25639 and 0.2.0.3-alpha (for bridge-purpose descriptors). 25640 - Only build circuits if we have a sufficient threshold of the total 25641 descriptors that are marked in the consensus with the "Exit" 25642 flag. This mitigates an attack proposed by wanoskarnet, in which 25643 all of a client's bridges collude to restrict the exit nodes that 25644 the client knows about. Fixes bug 5343. 25645 25646 o Major bugfixes (on Tor 0.2.3.x): 25647 - Avoid an assert when managed proxies like obfsproxy are configured, 25648 and we receive HUP signals or setconf attempts too rapidly. This 25649 situation happens most commonly when Vidalia tries to attach to 25650 Tor or tries to configure the Tor it's attached to. Fixes bug 5084; 25651 bugfix on 0.2.3.6-alpha. 25652 - Fix a relay-side pluggable transports bug where managed proxies were 25653 unreachable from the Internet, because Tor asked them to bind on 25654 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha. 25655 - Stop discarding command-line arguments when TestingTorNetwork 25656 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on 25657 0.2.3.9-alpha, where task 4552 added support for two layers of 25658 torrc files. 25659 - Resume allowing the unit tests to run in gdb. This was accidentally 25660 made impossible when the DisableDebuggerAttachment option was 25661 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha. 25662 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on 25663 0.2.3.11-alpha. Reported by Anthony G. Basile. 25664 25665 o Minor bugfixes (on 0.2.2.x and earlier): 25666 - Ensure we don't cannibalize circuits that are longer than three hops 25667 already, so we don't end up making circuits with 5 or more 25668 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on 25669 0.1.0.1-rc which introduced cannibalization. 25670 - Detect and reject certain misformed escape sequences in 25671 configuration values. Previously, these values would cause us 25672 to crash if received in a torrc file or over an authenticated 25673 control port. Bug found by Esteban Manchado Velázquez, and 25674 independently by Robert Connolly from Matta Consulting who further 25675 noted that it allows a post-authentication heap overflow. Patch 25676 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668); 25677 bugfix on 0.2.0.16-alpha. 25678 - Fix a compile warning when using the --enable-openbsd-malloc 25679 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc. 25680 - Directory caches no longer refuse to clean out descriptors because 25681 of missing v2 networkstatus documents, unless they're configured 25682 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on 25683 0.2.2.26-beta. Patch by Daniel Bryg. 25684 - Update to the latest version of the tinytest unit testing framework. 25685 This includes a couple of bugfixes that can be relevant for 25686 running forked unit tests on Windows, and removes all reserved 25687 identifiers. 25688 25689 o Minor bugfixes (on 0.2.3.x): 25690 - On a failed pipe() call, don't leak file descriptors. Fixes bug 25691 4296; bugfix on 0.2.3.1-alpha. 25692 - Spec conformance: on a v3 handshake, do not send a NETINFO cell 25693 until after we have received a CERTS cell. Fixes bug 4361; bugfix 25694 on 0.2.3.6-alpha. Patch by "frosty". 25695 - When binding to an IPv6 address, set the IPV6_V6ONLY socket 25696 option, so that the IP stack doesn't decide to use it for IPv4 25697 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha. 25698 - Ensure that variables set in Tor's environment cannot override 25699 environment variables that Tor passes to a managed 25700 pluggable-transport proxy. Previously, Tor would pass every 25701 variable in its environment to managed proxies along with the new 25702 ones, in such a way that on many operating systems, the inherited 25703 environment variables would override those which Tor tried to 25704 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems; 25705 bugfix on 0.2.3.9-alpha for Windows. 25706 25707 o Minor features: 25708 - A wide variety of new unit tests by Esteban Manchado Velázquez. 25709 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau. 25710 - Update to the March 6 2012 Maxmind GeoLite Country database. 25711 25712 25713Changes in version 0.2.3.12-alpha - 2012-02-13 25714 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients 25715 to use bridges that run Tor 0.2.2.x, and resolves several big bugs 25716 when Tor is configured to use a pluggable transport like obfsproxy. 25717 25718 o Major bugfixes: 25719 - Fix builds when the path to sed, openssl, or sha1sum contains 25720 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix 25721 on 0.2.2.1-alpha. 25722 - Set the SO_REUSEADDR socket option before we call bind() on outgoing 25723 connections. This change should allow busy exit relays to stop 25724 running out of available sockets as quickly. Fixes bug 4950; 25725 bugfix on 0.2.2.26-beta. 25726 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client 25727 would ask the bridge for microdescriptors, which are only supported 25728 in 0.2.3.x, and then fail to bootstrap when it didn't get the 25729 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha. 25730 - Properly set up obfsproxy's environment when in managed mode. The 25731 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy, 25732 and when you run your Tor as a daemon, there's no HOME. Fixes bugs 25733 5076 and 5082; bugfix on 0.2.3.6-alpha. 25734 25735 o Minor features: 25736 - Use the dead_strip option when building Tor on OS X. This reduces 25737 binary size by almost 19% when linking openssl and libevent 25738 statically, which we do for Tor Browser Bundle. 25739 - Fix broken URLs in the sample torrc file, and tell readers about 25740 the OutboundBindAddress, ExitPolicyRejectPrivate, and 25741 PublishServerDescriptor options. Addresses bug 4652. 25742 - Update to the February 7 2012 Maxmind GeoLite Country database. 25743 25744 o Minor bugfixes: 25745 - Downgrade the "We're missing a certificate" message from notice 25746 to info: people kept mistaking it for a real problem, whereas it 25747 is seldom the problem even when we are failing to bootstrap. Fixes 25748 bug 5067; bugfix on 0.2.0.10-alpha. 25749 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a 25750 managed pluggable transport server proxy's environment. 25751 Previously, we would put it there, even though Tor doesn't 25752 implement an 'extended server port' yet, and even though Tor 25753 almost certainly isn't listening at that address. For now, we set 25754 it to an empty string to avoid crashing older obfsproxies. Bugfix 25755 on 0.2.3.6-alpha. 25756 - Log the heartbeat message every HeartbeatPeriod seconds, not every 25757 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on 25758 0.2.3.1-alpha. Bug reported by Scott Bennett. 25759 - Calculate absolute paths correctly on Windows. Fixes bug 4973; 25760 bugfix on 0.2.3.11-alpha. 25761 - Update "ClientOnly" man page entry to explain that there isn't 25762 really any point to messing with it. Resolves ticket 5005. 25763 - Use the correct CVE number for CVE-2011-4576 in our comments and 25764 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on 25765 0.2.3.11-alpha. 25766 25767 o Code simplifications and refactoring: 25768 - Use the _WIN32 macro throughout our code to detect Windows. 25769 (Previously we had used the obsolete 'WIN32' and the idiosyncratic 25770 'MS_WINDOWS'.) 25771 25772 25773Changes in version 0.2.3.11-alpha - 2012-01-22 25774 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys 25775 the last step of the plan to limit maximum circuit length, includes 25776 a wide variety of hidden service performance and correctness fixes, 25777 works around an OpenSSL security flaw if your distro is too stubborn 25778 to upgrade, and fixes a bunch of smaller issues. 25779 25780 o Major features: 25781 - Now that Tor 0.2.0.x is completely deprecated, enable the final 25782 part of "Proposal 110: Avoiding infinite length circuits" by 25783 refusing all circuit-extend requests that do not use a relay_early 25784 cell. This change helps Tor resist a class of denial-of-service 25785 attacks by limiting the maximum circuit length. 25786 - Adjust the number of introduction points that a hidden service 25787 will try to maintain based on how long its introduction points 25788 remain in use and how many introductions they handle. Fixes 25789 part of bug 3825. 25790 - Try to use system facilities for enumerating local interface 25791 addresses, before falling back to our old approach (which was 25792 binding a UDP socket, and calling getsockname() on it). That 25793 approach was scaring OS X users whose draconian firewall 25794 software warned about binding to UDP sockets, regardless of 25795 whether packets were sent. Now we try to use getifaddrs(), 25796 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the 25797 system supports. Resolves ticket 1827. 25798 25799 o Major security workaround: 25800 - When building or running with any version of OpenSSL earlier 25801 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL 25802 versions have a bug (CVE-2011-4576) in which their block cipher 25803 padding includes uninitialized data, potentially leaking sensitive 25804 information to any peer with whom they make a SSLv3 connection. Tor 25805 does not use SSL v3 by default, but a hostile client or server 25806 could force an SSLv3 connection in order to gain information that 25807 they shouldn't have been able to get. The best solution here is to 25808 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building 25809 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely 25810 to make sure that the bug can't happen. 25811 25812 o Major bugfixes: 25813 - Fix the SOCKET_OK test that we use to tell when socket 25814 creation fails so that it works on Win64. Fixes part of bug 4533; 25815 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet. 25816 - Correct our replacements for the timeradd() and timersub() functions 25817 on platforms that lack them (for example, Windows). The timersub() 25818 function is used when expiring circuits, while timeradd() is 25819 currently unused. Bug report and patch by Vektor. Fixes bug 4778; 25820 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha. 25821 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug 25822 that was fixed in OpenSSL 1.0.0a. We test for the counter mode 25823 bug at runtime, not compile time, because some distributions hack 25824 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix 25825 on 0.2.3.9-alpha. Found by Pascal. 25826 25827 o Minor features (controller): 25828 - Use absolute path names when reporting the torrc filename in the 25829 control protocol, so a controller can more easily find the torrc 25830 file. Resolves bug 1101. 25831 - Extend the control protocol to report flags that control a circuit's 25832 path selection in CIRC events and in replies to 'GETINFO 25833 circuit-status'. Implements part of ticket 2411. 25834 - Extend the control protocol to report the hidden service address 25835 and current state of a hidden-service-related circuit in CIRC 25836 events and in replies to 'GETINFO circuit-status'. Implements part 25837 of ticket 2411. 25838 - When reporting the path to the cookie file to the controller, 25839 give an absolute path. Resolves ticket 4881. 25840 - Allow controllers to request an event notification whenever a 25841 circuit is cannibalized or its purpose is changed. Implements 25842 part of ticket 3457. 25843 - Include the creation time of a circuit in CIRC and CIRC2 25844 control-port events and the list produced by the 'GETINFO 25845 circuit-status' control-port command. 25846 25847 o Minor features (directory authorities): 25848 - Directory authorities now reject versions of Tor older than 25849 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha 25850 inclusive. These versions accounted for only a small fraction of 25851 the Tor network, and have numerous known security issues. Resolves 25852 issue 4788. 25853 - Authority operators can now vote for all relays in a given 25854 set of countries to be BadDir/BadExit/Invalid/Rejected. 25855 - Provide two consensus parameters (FastFlagMinThreshold and 25856 FastFlagMaxThreshold) to control the range of allowable bandwidths 25857 for the Fast directory flag. These allow authorities to run 25858 experiments on appropriate requirements for being a "Fast" node. 25859 The AuthDirFastGuarantee config value still applies. Implements 25860 ticket 3946. 25861 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays 25862 directory authority option (introduced in Tor 0.2.2.34). 25863 25864 o Minor features (other): 25865 - Don't disable the DirPort when we cannot exceed our AccountingMax 25866 limit during this interval because the effective bandwidthrate is 25867 low enough. This is useful in a situation where AccountMax is only 25868 used as an additional safeguard or to provide statistics. 25869 - Prepend an informative header to generated dynamic_dh_params files. 25870 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that 25871 EntryNodes will have no effect. Resolves issue 2571. 25872 - Log more useful messages when we fail to disable debugger 25873 attachment. 25874 - Log which authority we're missing votes from when we go to fetch 25875 them from the other auths. 25876 - Log (at debug level) whenever a circuit's purpose is changed. 25877 - Add missing documentation for the MaxClientCircuitsPending, 25878 UseMicrodescriptors, UserspaceIOCPBuffers, and 25879 _UseFilteringSSLBufferevents options, all introduced during 25880 the 0.2.3.x series. 25881 - Update to the January 3 2012 Maxmind GeoLite Country database. 25882 25883 o Minor bugfixes (hidden services): 25884 - Don't close hidden service client circuits which have almost 25885 finished connecting to their destination when they reach 25886 the normal circuit-build timeout. Previously, we would close 25887 introduction circuits which are waiting for an acknowledgement 25888 from the introduction point, and rendezvous circuits which have 25889 been specified in an INTRODUCE1 cell sent to a hidden service, 25890 after the normal CBT. Now, we mark them as 'timed out', and launch 25891 another rendezvous attempt in parallel. This behavior change can 25892 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout 25893 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha. 25894 - Don't close hidden-service-side rendezvous circuits when they 25895 reach the normal circuit-build timeout. This behavior change can 25896 be disabled using the new 25897 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the 25898 remaining part of bug 1297; bugfix on 0.2.2.2-alpha. 25899 - Make sure we never mark the wrong rendezvous circuit as having 25900 had its introduction cell acknowledged by the introduction-point 25901 relay. Previously, when we received an INTRODUCE_ACK cell on a 25902 client-side hidden-service introduction circuit, we might have 25903 marked a rendezvous circuit other than the one we specified in 25904 the INTRODUCE1 cell as INTRO_ACKED, which would have produced 25905 a warning message and interfered with the hidden service 25906 connection-establishment process. Fixes bug 4759; bugfix on 25907 0.2.3.3-alpha, when we added the stream-isolation feature which 25908 might cause Tor to open multiple rendezvous circuits for the same 25909 hidden service. 25910 - Don't trigger an assertion failure when we mark a new client-side 25911 hidden-service introduction circuit for close during the process 25912 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported 25913 by murb. 25914 25915 o Minor bugfixes (log messages): 25916 - Correctly spell "connect" in a log message on failure to create a 25917 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and 25918 0.2.3.2-alpha. 25919 - Fix a typo in a log message in rend_service_rendezvous_has_opened(). 25920 Fixes bug 4856; bugfix on Tor 0.0.6. 25921 - Fix the log message describing how we work around discovering 25922 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug 25923 4837; bugfix on 0.2.2.9-alpha. 25924 - When logging about a disallowed .exit name, do not also call it 25925 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha. 25926 25927 o Minor bugfixes (build fixes): 25928 - During configure, detect when we're building with clang version 25929 3.0 or lower and disable the -Wnormalized=id and -Woverride-init 25930 CFLAGS. clang doesn't support them yet. 25931 - During configure, search for library containing cos function as 25932 libm lives in libcore on some platforms (BeOS/Haiku). Linking 25933 against libm was hard-coded before. Fixes the first part of bug 25934 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes 25935 Pedersen. 25936 - Detect attempts to build Tor on (as yet hypothetical) versions 25937 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial 25938 fix for bug 4533. Bugfix on 0.2.2.28-beta. 25939 - Preprocessor directives should not be put inside the arguments 25940 of a macro. This would break compilation with GCC releases prior 25941 to version 3.3. We would never recommend such an old GCC version, 25942 but it is apparently required for binary compatibility on some 25943 platforms (namely, certain builds of Haiku). Fixes the other part 25944 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin 25945 Hebnes Pedersen. 25946 25947 o Minor bugfixes (other): 25948 - Older Linux kernels erroneously respond to strange nmap behavior 25949 by having accept() return successfully with a zero-length 25950 socket. When this happens, just close the connection. Previously, 25951 we would try harder to learn the remote address: but there was 25952 no such remote address to learn, and our method for trying to 25953 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix 25954 on 0.1.0.3-rc. Reported and diagnosed by "r1eo". 25955 - Fix null-pointer access that could occur if TLS allocation failed. 25956 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was 25957 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had 25958 accidentally been reverted. 25959 - Fix our implementation of crypto_random_hostname() so it can't 25960 overflow on ridiculously large inputs. (No Tor version has ever 25961 provided this kind of bad inputs, but let's be correct in depth.) 25962 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer. 25963 - Find more places in the code that should have been testing for 25964 invalid sockets using the SOCKET_OK macro. Required for a fix 25965 for bug 4533. Bugfix on 0.2.2.28-beta. 25966 - Fix an assertion failure when, while running with bufferevents, a 25967 connection finishes connecting after it is marked for close, but 25968 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha. 25969 - test_util_spawn_background_ok() hardcoded the expected value 25970 for ENOENT to 2. This isn't portable as error numbers are 25971 platform specific, and particularly the hurd has ENOENT at 25972 0x40000002. Construct expected string at runtime, using the correct 25973 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha. 25974 - Reject attempts to disable DisableDebuggerAttachment while Tor is 25975 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha. 25976 - Use an appropriate-width type for sockets in tor-fw-helper on 25977 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha. 25978 25979 o Feature removal: 25980 - When sending or relaying a RELAY_EARLY cell, we used to convert 25981 it to a RELAY cell if the connection was using the v1 link 25982 protocol. This was a workaround for older versions of Tor, which 25983 didn't handle RELAY_EARLY cells properly. Now that all supported 25984 versions can handle RELAY_EARLY cells, and now that we're enforcing 25985 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule, 25986 remove this workaround. Addresses bug 4786. 25987 25988 o Code simplifications and refactoring: 25989 - Use OpenSSL's built-in SSL_state_string_long() instead of our 25990 own homebrewed ssl_state_to_string() replacement. Patch from 25991 Emile Snyder. Fixes bug 4653. 25992 - Use macros to indicate OpenSSL versions, so we don't need to worry 25993 about accidental hexadecimal bit shifts. 25994 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer 25995 supported). 25996 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf. 25997 - Use the smartlist_add_asprintf() alias more consistently. 25998 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an 25999 invalid value, rather than just -1. 26000 - Rename a handful of old identifiers, mostly related to crypto 26001 structures and crypto functions. By convention, our "create an 26002 object" functions are called "type_new()", our "free an object" 26003 functions are called "type_free()", and our types indicate that 26004 they are types only with a final "_t". But a handful of older 26005 types and functions broke these rules, with function names like 26006 "type_create" or "subsystem_op_type", or with type names like 26007 type_env_t. 26008 26009 26010Changes in version 0.2.3.10-alpha - 2011-12-16 26011 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in 26012 Tor's buffers code. Absolutely everybody should upgrade. 26013 26014 The bug relied on an incorrect calculation when making data continuous 26015 in one of our IO buffers, if the first chunk of the buffer was 26016 misaligned by just the wrong amount. The miscalculation would allow an 26017 attacker to overflow a piece of heap-allocated memory. To mount this 26018 attack, the attacker would need to either open a SOCKS connection to 26019 Tor's SocksPort (usually restricted to localhost), or target a Tor 26020 instance configured to make its connections through a SOCKS proxy 26021 (which Tor does not do by default). 26022 26023 Good security practice requires that all heap-overflow bugs should be 26024 presumed to be exploitable until proven otherwise, so we are treating 26025 this as a potential code execution attack. Please upgrade immediately! 26026 This bug does not affect bufferevents-based builds of Tor. Special 26027 thanks to "Vektor" for reporting this issue to us! 26028 26029 This release also contains a few minor bugfixes for issues discovered 26030 in 0.2.3.9-alpha. 26031 26032 o Major bugfixes: 26033 - Fix a heap overflow bug that could occur when trying to pull 26034 data into the first chunk of a buffer, when that chunk had 26035 already had some data drained from it. Fixes CVE-2011-2778; 26036 bugfix on 0.2.0.16-alpha. Reported by "Vektor". 26037 26038 o Minor bugfixes: 26039 - If we can't attach streams to a rendezvous circuit when we 26040 finish connecting to a hidden service, clear the rendezvous 26041 circuit's stream-isolation state and try to attach streams 26042 again. Previously, we cleared rendezvous circuits' isolation 26043 state either too early (if they were freshly built) or not at all 26044 (if they had been built earlier and were cannibalized). Bugfix on 26045 0.2.3.3-alpha; fixes bug 4655. 26046 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on 26047 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile. 26048 - Fix an assertion failure when a relay with accounting enabled 26049 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha. 26050 26051 o Minor features: 26052 - Update to the December 6 2011 Maxmind GeoLite Country database. 26053 26054 26055Changes in version 0.2.2.35 - 2011-12-16 26056 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's 26057 buffers code. Absolutely everybody should upgrade. 26058 26059 The bug relied on an incorrect calculation when making data continuous 26060 in one of our IO buffers, if the first chunk of the buffer was 26061 misaligned by just the wrong amount. The miscalculation would allow an 26062 attacker to overflow a piece of heap-allocated memory. To mount this 26063 attack, the attacker would need to either open a SOCKS connection to 26064 Tor's SocksPort (usually restricted to localhost), or target a Tor 26065 instance configured to make its connections through a SOCKS proxy 26066 (which Tor does not do by default). 26067 26068 Good security practice requires that all heap-overflow bugs should be 26069 presumed to be exploitable until proven otherwise, so we are treating 26070 this as a potential code execution attack. Please upgrade immediately! 26071 This bug does not affect bufferevents-based builds of Tor. Special 26072 thanks to "Vektor" for reporting this issue to us! 26073 26074 Tor 0.2.2.35 also fixes several bugs in previous versions, including 26075 crash bugs for unusual configurations, and a long-term bug that 26076 would prevent Tor from starting on Windows machines with draconian 26077 AV software. 26078 26079 With this release, we remind everyone that 0.2.0.x has reached its 26080 formal end-of-life. Those Tor versions have many known flaws, and 26081 nobody should be using them. You should upgrade -- ideally to the 26082 0.2.2.x series. If you're using a Linux or BSD and its packages are 26083 obsolete, stop using those packages and upgrade anyway. 26084 26085 The Tor 0.2.1.x series is also approaching its end-of-life: it will no 26086 longer receive support after some time in early 2012. 26087 26088 o Major bugfixes: 26089 - Fix a heap overflow bug that could occur when trying to pull 26090 data into the first chunk of a buffer, when that chunk had 26091 already had some data drained from it. Fixes CVE-2011-2778; 26092 bugfix on 0.2.0.16-alpha. Reported by "Vektor". 26093 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so 26094 that it doesn't attempt to allocate a socketpair. This could cause 26095 some problems on Windows systems with overzealous firewalls. Fix for 26096 bug 4457; workaround for Libevent versions 2.0.1-alpha through 26097 2.0.15-stable. 26098 - If we mark an OR connection for close based on a cell we process, 26099 don't process any further cells on it. We already avoid further 26100 reads on marked-for-close connections, but now we also discard the 26101 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha, 26102 which was the first version where we might mark a connection for 26103 close based on processing a cell on it. 26104 - Correctly sanity-check that we don't underflow on a memory 26105 allocation (and then assert) for hidden service introduction 26106 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410; 26107 bugfix on 0.2.1.5-alpha. 26108 - Fix a memory leak when we check whether a hidden service 26109 descriptor has any usable introduction points left. Fixes bug 26110 4424. Bugfix on 0.2.2.25-alpha. 26111 - Don't crash when we're running as a relay and don't have a GeoIP 26112 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix 26113 we've had in the 0.2.3.x branch already. 26114 - When running as a client, do not print a misleading (and plain 26115 wrong) log message that we're collecting "directory request" 26116 statistics: clients don't collect statistics. Also don't create a 26117 useless (because empty) stats file in the stats/ directory. Fixes 26118 bug 4353; bugfix on 0.2.2.34. 26119 26120 o Minor bugfixes: 26121 - Detect failure to initialize Libevent. This fix provides better 26122 detection for future instances of bug 4457. 26123 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers 26124 function. This was eating up hideously large amounts of time on some 26125 busy servers. Fixes bug 4518; bugfix on 0.0.9.8. 26126 - Resolve an integer overflow bug in smartlist_ensure_capacity(). 26127 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by 26128 Mansour Moufid. 26129 - Don't warn about unused log_mutex in log.c when building with 26130 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on 26131 0.1.0.6-rc which introduced --disable-threads. 26132 - When configuring, starting, or stopping an NT service, stop 26133 immediately after the service configuration attempt has succeeded 26134 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha. 26135 - When sending a NETINFO cell, include the original address 26136 received for the other side, not its canonical address. Found 26137 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha. 26138 - Fix a typo in a hibernation-related log message. Fixes bug 4331; 26139 bugfix on 0.2.2.23-alpha; found by "tmpname0901". 26140 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that 26141 occurred when a client tried to fetch a descriptor for a bridge 26142 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha. 26143 - Backport fixes for a pair of compilation warnings on Windows. 26144 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta. 26145 - If we had ever tried to call tor_addr_to_str on an address of 26146 unknown type, we would have done a strdup on an uninitialized 26147 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha. 26148 Reported by "troll_un". 26149 - Correctly detect and handle transient lookup failures from 26150 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha. 26151 Reported by "troll_un". 26152 - Fix null-pointer access that could occur if TLS allocation failed. 26153 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". 26154 - Use tor_socket_t type for listener argument to accept(). Fixes bug 26155 4535; bugfix on 0.2.2.28-beta. Found by "troll_un". 26156 26157 o Minor features: 26158 - Add two new config options for directory authorities: 26159 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the 26160 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold 26161 that is always sufficient to satisfy the bandwidth requirement for 26162 the Guard flag. Now it will be easier for researchers to simulate 26163 Tor networks with different values. Resolves ticket 4484. 26164 - When Tor ignores a hidden service specified in its configuration, 26165 include the hidden service's directory in the warning message. 26166 Previously, we would only tell the user that some hidden service 26167 was ignored. Bugfix on 0.0.6; fixes bug 4426. 26168 - Update to the December 6 2011 Maxmind GeoLite Country database. 26169 26170 o Packaging changes: 26171 - Make it easier to automate expert package builds on Windows, 26172 by removing an absolute path from makensis.exe command. 26173 26174 26175Changes in version 0.2.1.32 - 2011-12-16 26176 Tor 0.2.1.32 backports important security and privacy fixes for 26177 oldstable. This release is intended only for package maintainers and 26178 others who cannot use the 0.2.2 stable series. All others should be 26179 using Tor 0.2.2.x or newer. 26180 26181 The Tor 0.2.1.x series will reach formal end-of-life some time in 26182 early 2012; we will stop releasing patches for it then. 26183 26184 o Major bugfixes (also included in 0.2.2.x): 26185 - Correctly sanity-check that we don't underflow on a memory 26186 allocation (and then assert) for hidden service introduction 26187 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410; 26188 bugfix on 0.2.1.5-alpha. 26189 - Fix a heap overflow bug that could occur when trying to pull 26190 data into the first chunk of a buffer, when that chunk had 26191 already had some data drained from it. Fixes CVE-2011-2778; 26192 bugfix on 0.2.0.16-alpha. Reported by "Vektor". 26193 26194 o Minor features: 26195 - Update to the December 6 2011 Maxmind GeoLite Country database. 26196 26197 26198Changes in version 0.2.3.9-alpha - 2011-12-08 26199 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds 26200 a "DisableNetwork" security feature that bundles can use to avoid 26201 touching the network until bridges are configured, moves forward on 26202 the pluggable transport design, fixes a flaw in the hidden service 26203 design that unnecessarily prevented clients with wrong clocks from 26204 reaching hidden services, and fixes a wide variety of other issues. 26205 26206 o Major features: 26207 - Clients can now connect to private bridges over IPv6. Bridges 26208 still need at least one IPv4 address in order to connect to 26209 other relays. Note that we don't yet handle the case where the 26210 user has two bridge lines for the same bridge (one IPv4, one 26211 IPv6). Implements parts of proposal 186. 26212 - New "DisableNetwork" config option to prevent Tor from launching any 26213 connections or accepting any connections except on a control port. 26214 Bundles and controllers can set this option before letting Tor talk 26215 to the rest of the network, for example to prevent any connections 26216 to a non-bridge address. Packages like Orbot can also use this 26217 option to instruct Tor to save power when the network is off. 26218 - Clients and bridges can now be configured to use a separate 26219 "transport" proxy. This approach makes the censorship arms race 26220 easier by allowing bridges to use protocol obfuscation plugins. It 26221 implements the "managed proxy" part of proposal 180 (ticket 3472). 26222 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode 26223 implementation. It makes AES_CTR about 7% faster than our old one 26224 (which was about 10% faster than the one OpenSSL used to provide). 26225 Resolves ticket 4526. 26226 - Add a "tor2web mode" for clients that want to connect to hidden 26227 services non-anonymously (and possibly more quickly). As a safety 26228 measure to try to keep users from turning this on without knowing 26229 what they are doing, tor2web mode must be explicitly enabled at 26230 compile time, and a copy of Tor compiled to run in tor2web mode 26231 cannot be used as a normal Tor client. Implements feature 2553. 26232 - Add experimental support for running on Windows with IOCP and no 26233 kernel-space socket buffers. This feature is controlled by a new 26234 "UserspaceIOCPBuffers" config option (off by default), which has 26235 no effect unless Tor has been built with support for bufferevents, 26236 is running on Windows, and has enabled IOCP. This may, in the long 26237 run, help solve or mitigate bug 98. 26238 - Use a more secure consensus parameter voting algorithm. Now at 26239 least three directory authorities or a majority of them must 26240 vote on a given parameter before it will be included in the 26241 consensus. Implements proposal 178. 26242 26243 o Major bugfixes: 26244 - Hidden services now ignore the timestamps on INTRODUCE2 cells. 26245 They used to check that the timestamp was within 30 minutes 26246 of their system clock, so they could cap the size of their 26247 replay-detection cache, but that approach unnecessarily refused 26248 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when 26249 the v3 intro-point protocol (the first one which sent a timestamp 26250 field in the INTRODUCE2 cell) was introduced; fixes bug 3460. 26251 - Only use the EVP interface when AES acceleration is enabled, 26252 to avoid a 5-7% performance regression. Resolves issue 4525; 26253 bugfix on 0.2.3.8-alpha. 26254 26255 o Privacy/anonymity features (bridge detection): 26256 - Make bridge SSL certificates a bit more stealthy by using random 26257 serial numbers, in the same fashion as OpenSSL when generating 26258 self-signed certificates. Implements ticket 4584. 26259 - Introduce a new config option "DynamicDHGroups", enabled by 26260 default, which provides each bridge with a unique prime DH modulus 26261 to be used during SSL handshakes. This option attempts to help 26262 against censors who might use the Apache DH modulus as a static 26263 identifier for bridges. Addresses ticket 4548. 26264 26265 o Minor features (new/different config options): 26266 - New configuration option "DisableDebuggerAttachment" (on by default) 26267 to prevent basic debugging attachment attempts by other processes. 26268 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313. 26269 - Allow MapAddress directives to specify matches against super-domains, 26270 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit". 26271 Implements issue 933. 26272 - Slightly change behavior of "list" options (that is, config 26273 options that can appear more than once) when they appear both in 26274 torrc and on the command line. Previously, the command-line options 26275 would be appended to the ones from torrc. Now, the command-line 26276 options override the torrc options entirely. This new behavior 26277 allows the user to override list options (like exit policies and 26278 ports to listen on) from the command line, rather than simply 26279 appending to the list. 26280 - You can get the old (appending) command-line behavior for "list" 26281 options by prefixing the option name with a "+". 26282 - You can remove all the values for a "list" option from the command 26283 line without adding any new ones by prefixing the option name 26284 with a "/". 26285 - Add experimental support for a "defaults" torrc file to be parsed 26286 before the regular torrc. Torrc options override the defaults file's 26287 options in the same way that the command line overrides the torrc. 26288 The SAVECONF controller command saves only those options which 26289 differ between the current configuration and the defaults file. HUP 26290 reloads both files. (Note: This is an experimental feature; its 26291 behavior will probably be refined in future 0.2.3.x-alpha versions 26292 to better meet packagers' needs.) Implements task 4552. 26293 26294 o Minor features: 26295 - Try to make the introductory warning message that Tor prints on 26296 startup more useful for actually finding help and information. 26297 Resolves ticket 2474. 26298 - Running "make version" now displays the version of Tor that 26299 we're about to build. Idea from katmagic; resolves issue 4400. 26300 - Expire old or over-used hidden service introduction points. 26301 Required by fix for bug 3460. 26302 - Move the replay-detection cache for the RSA-encrypted parts of 26303 INTRODUCE2 cells to the introduction point data structures. 26304 Previously, we would use one replay-detection cache per hidden 26305 service. Required by fix for bug 3460. 26306 - Reduce the lifetime of elements of hidden services' Diffie-Hellman 26307 public key replay-detection cache from 60 minutes to 5 minutes. This 26308 replay-detection cache is now used only to detect multiple 26309 INTRODUCE2 cells specifying the same rendezvous point, so we can 26310 avoid launching multiple simultaneous attempts to connect to it. 26311 26312 o Minor bugfixes (on Tor 0.2.2.x and earlier): 26313 - Resolve an integer overflow bug in smartlist_ensure_capacity(). 26314 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by 26315 Mansour Moufid. 26316 - Fix a minor formatting issue in one of tor-gencert's error messages. 26317 Fixes bug 4574. 26318 - Prevent a false positive from the check-spaces script, by disabling 26319 the "whitespace between function name and (" check for functions 26320 named 'op()'. 26321 - Fix a log message suggesting that people contact a non-existent 26322 email address. Fixes bug 3448. 26323 - Fix null-pointer access that could occur if TLS allocation failed. 26324 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". 26325 - Report a real bootstrap problem to the controller on router 26326 identity mismatch. Previously we just said "foo", which probably 26327 made a lot of sense at the time. Fixes bug 4169; bugfix on 26328 0.2.1.1-alpha. 26329 - If we had ever tried to call tor_addr_to_str() on an address of 26330 unknown type, we would have done a strdup() on an uninitialized 26331 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha. 26332 Reported by "troll_un". 26333 - Correctly detect and handle transient lookup failures from 26334 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha. 26335 Reported by "troll_un". 26336 - Use tor_socket_t type for listener argument to accept(). Fixes bug 26337 4535; bugfix on 0.2.2.28-beta. Found by "troll_un". 26338 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes 26339 bug 4532; found by "troll_un". 26340 26341 o Minor bugfixes (on Tor 0.2.3.x): 26342 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha; 26343 fixes bug 4554. 26344 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new 26345 circuit for use as a hidden service client's rendezvous point. 26346 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed 26347 with help from wanoskarnet. 26348 - Restore behavior of overriding SocksPort, ORPort, and similar 26349 options from the command line. Bugfix on 0.2.3.3-alpha. 26350 26351 o Build fixes: 26352 - Properly handle the case where the build-tree is not the same 26353 as the source tree when generating src/common/common_sha1.i, 26354 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953; 26355 bugfix on 0.2.0.1-alpha. 26356 26357 o Code simplifications, cleanups, and refactorings: 26358 - Remove the pure attribute from all functions that used it 26359 previously. In many cases we assigned it incorrectly, because the 26360 functions might assert or call impure functions, and we don't have 26361 evidence that keeping the pure attribute is worthwhile. Implements 26362 changes suggested in ticket 4421. 26363 - Remove some dead code spotted by coverity. Fixes cid 432. 26364 Bugfix on 0.2.3.1-alpha, closes bug 4637. 26365 26366 26367Changes in version 0.2.3.8-alpha - 2011-11-22 26368 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a 26369 socketpair-related bug that has been bothering Windows users. It adds 26370 support to serve microdescriptors to controllers, so Vidalia's network 26371 map can resume listing relays (once Vidalia implements its side), 26372 and adds better support for hardware AES acceleration. Finally, it 26373 starts the process of adjusting the bandwidth cutoff for getting the 26374 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show 26375 that tiny relays harm performance more than they help network capacity. 26376 26377 o Major bugfixes: 26378 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so 26379 that it doesn't attempt to allocate a socketpair. This could cause 26380 some problems on Windows systems with overzealous firewalls. Fix for 26381 bug 4457; workaround for Libevent versions 2.0.1-alpha through 26382 2.0.15-stable. 26383 - Correctly sanity-check that we don't underflow on a memory 26384 allocation (and then assert) for hidden service introduction 26385 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410; 26386 bugfix on 0.2.1.5-alpha. 26387 - Remove the artificially low cutoff of 20KB to guarantee the Fast 26388 flag. In the past few years the average relay speed has picked 26389 up, and while the "top 7/8 of the network get the Fast flag" and 26390 "all relays with 20KB or more of capacity get the Fast flag" rules 26391 used to have the same result, now the top 7/8 of the network has 26392 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489. 26393 - Fix a rare assertion failure when checking whether a v0 hidden 26394 service descriptor has any usable introduction points left, and 26395 we don't have enough information to build a circuit to the first 26396 intro point named in the descriptor. The HS client code in 26397 0.2.3.x no longer uses v0 HS descriptors, but this assertion can 26398 trigger on (and crash) v0 HS authorities. Fixes bug 4411. 26399 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un. 26400 - Make bridge authorities not crash when they are asked for their own 26401 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green. 26402 - When running as a client, do not print a misleading (and plain 26403 wrong) log message that we're collecting "directory request" 26404 statistics: clients don't collect statistics. Also don't create a 26405 useless (because empty) stats file in the stats/ directory. Fixes 26406 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha. 26407 26408 o Major features: 26409 - Allow Tor controllers like Vidalia to obtain the microdescriptor 26410 for a relay by identity digest or nickname. Previously, 26411 microdescriptors were only available by their own digests, so a 26412 controller would have to ask for and parse the whole microdescriptor 26413 consensus in order to look up a single relay's microdesc. Fixes 26414 bug 3832; bugfix on 0.2.3.1-alpha. 26415 - Use OpenSSL's EVP interface for AES encryption, so that all AES 26416 operations can use hardware acceleration (if present). Resolves 26417 ticket 4442. 26418 26419 o Minor bugfixes (on 0.2.2.x and earlier): 26420 - Detect failure to initialize Libevent. This fix provides better 26421 detection for future instances of bug 4457. 26422 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers 26423 function. This was eating up hideously large amounts of time on some 26424 busy servers. Fixes bug 4518; bugfix on 0.0.9.8. 26425 - Don't warn about unused log_mutex in log.c when building with 26426 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on 26427 0.1.0.6-rc which introduced --disable-threads. 26428 - Allow manual 'authenticate' commands to the controller interface 26429 from netcat (nc) as well as telnet. We were rejecting them because 26430 they didn't come with the expected whitespace at the end of the 26431 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893. 26432 - Fix some (not actually triggerable) buffer size checks in usage of 26433 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch 26434 by Anders Sundman. 26435 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes 26436 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman. 26437 - When configuring, starting, or stopping an NT service, stop 26438 immediately after the service configuration attempt has succeeded 26439 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha. 26440 - When sending a NETINFO cell, include the original address 26441 received for the other side, not its canonical address. Found 26442 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha. 26443 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest 26444 can pick them up when the tests aren't disabled. Bugfix on 26445 0.2.2.4-alpha which introduced tinytest. 26446 - Fix a memory leak when we check whether a hidden service 26447 descriptor has any usable introduction points left. Fixes bug 26448 4424. Bugfix on 0.2.2.25-alpha. 26449 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that 26450 occurred when a client tried to fetch a descriptor for a bridge 26451 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha. 26452 26453 o Minor bugfixes (on 0.2.3.x): 26454 - Make util unit tests build correctly with MSVC. Bugfix on 26455 0.2.3.3-alpha. Patch by Gisle Vanem. 26456 - Successfully detect AUTH_CHALLENGE cells with no recognized 26457 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha. 26458 Found by frosty_un. 26459 - If a relay receives an AUTH_CHALLENGE cell it can't answer, 26460 it should still send a NETINFO cell to allow the connection to 26461 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by 26462 "frosty". 26463 - Log less loudly when we get an invalid authentication certificate 26464 from a source other than a directory authority: it's not unusual 26465 to see invalid certs because of clock skew. Fixes bug 4370; bugfix 26466 on 0.2.3.6-alpha. 26467 - Tolerate servers with more clock skew in their authentication 26468 certificates than previously. Fixes bug 4371; bugfix on 26469 0.2.3.6-alpha. 26470 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix 26471 on 0.2.3.4-alpha and 0.2.3.6-alpha. 26472 26473 o Minor features: 26474 - Add two new config options for directory authorities: 26475 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the 26476 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold 26477 that is always sufficient to satisfy the bandwidth requirement for 26478 the Guard flag. Now it will be easier for researchers to simulate 26479 Tor networks with different values. Resolves ticket 4484. 26480 - When Tor ignores a hidden service specified in its configuration, 26481 include the hidden service's directory in the warning message. 26482 Previously, we would only tell the user that some hidden service 26483 was ignored. Bugfix on 0.0.6; fixes bug 4426. 26484 - When we fail to initialize Libevent, retry with IOCP disabled so we 26485 don't need to turn on multi-threading support in Libevent, which in 26486 turn requires a working socketpair(). This is a workaround for bug 26487 4457, which affects Libevent versions from 2.0.1-alpha through 26488 2.0.15-stable. 26489 - Detect when we try to build on a platform that doesn't define 26490 AF_UNSPEC to 0. We don't work there, so refuse to compile. 26491 - Update to the November 1 2011 Maxmind GeoLite Country database. 26492 26493 o Packaging changes: 26494 - Make it easier to automate expert package builds on Windows, 26495 by removing an absolute path from makensis.exe command. 26496 26497 o Code simplifications and refactoring: 26498 - Remove some redundant #include directives throughout the code. 26499 Patch from Andrea Gelmini. 26500 - Unconditionally use OpenSSL's AES implementation instead of our 26501 old built-in one. OpenSSL's AES has been better for a while, and 26502 relatively few servers should still be on any version of OpenSSL 26503 that doesn't have good optimized assembly AES. 26504 - Use the name "CERTS" consistently to refer to the new cell type; 26505 we were calling it CERT in some places and CERTS in others. 26506 26507 o Testing: 26508 - Numerous new unit tests for functions in util.c and address.c by 26509 Anders Sundman. 26510 - The long-disabled benchmark tests are now split into their own 26511 ./src/test/bench binary. 26512 - The benchmark tests can now use more accurate timers than 26513 gettimeofday() when such timers are available. 26514 26515 26516Changes in version 0.2.3.7-alpha - 2011-10-30 26517 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by 26518 the new v3 handshake. It also resolves yet another bridge address 26519 enumeration issue. 26520 26521 o Major bugfixes: 26522 - If we mark an OR connection for close based on a cell we process, 26523 don't process any further cells on it. We already avoid further 26524 reads on marked-for-close connections, but now we also discard the 26525 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha, 26526 which was the first version where we might mark a connection for 26527 close based on processing a cell on it. 26528 - Fix a double-free bug that would occur when we received an invalid 26529 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343; 26530 bugfix on 0.2.3.6-alpha. 26531 - Bridges no longer include their address in NETINFO cells on outgoing 26532 OR connections, to allow them to blend in better with clients. 26533 Removes another avenue for enumerating bridges. Reported by 26534 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO 26535 cells were introduced. 26536 26537 o Trivial fixes: 26538 - Fixed a typo in a hibernation-related log message. Fixes bug 4331; 26539 bugfix on 0.2.2.23-alpha; found by "tmpname0901". 26540 26541 26542Changes in version 0.2.3.6-alpha - 2011-10-26 26543 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical 26544 anonymity vulnerability where an attacker can deanonymize Tor 26545 users. Everybody should upgrade. 26546 26547 This release also features support for a new v3 connection handshake 26548 protocol, and fixes to make hidden service connections more robust. 26549 26550 o Major features: 26551 - Implement a new handshake protocol (v3) for authenticating Tors to 26552 each other over TLS. It should be more resistant to fingerprinting 26553 than previous protocols, and should require less TLS hacking for 26554 future Tor implementations. Implements proposal 176. 26555 - Allow variable-length padding cells to disguise the length of 26556 Tor's TLS records. Implements part of proposal 184. 26557 26558 o Privacy/anonymity fixes (clients): 26559 - Clients and bridges no longer send TLS certificate chains on 26560 outgoing OR connections. Previously, each client or bridge would 26561 use the same cert chain for all outgoing OR connections until 26562 its IP address changes, which allowed any relay that the client 26563 or bridge contacted to determine which entry guards it is using. 26564 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un". 26565 - If a relay receives a CREATE_FAST cell on a TLS connection, it 26566 no longer considers that connection as suitable for satisfying a 26567 circuit EXTEND request. Now relays can protect clients from the 26568 CVE-2011-2768 issue even if the clients haven't upgraded yet. 26569 - Directory authorities no longer assign the Guard flag to relays 26570 that haven't upgraded to the above "refuse EXTEND requests 26571 to client connections" fix. Now directory authorities can 26572 protect clients from the CVE-2011-2768 issue even if neither 26573 the clients nor the relays have upgraded yet. There's a new 26574 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option 26575 to let us transition smoothly, else tomorrow there would be no 26576 guard relays. 26577 26578 o Major bugfixes (hidden services): 26579 - Improve hidden service robustness: when an attempt to connect to 26580 a hidden service ends, be willing to refetch its hidden service 26581 descriptors from each of the HSDir relays responsible for them 26582 immediately. Previously, we would not consider refetching the 26583 service's descriptors from each HSDir for 15 minutes after the last 26584 fetch, which was inconvenient if the hidden service was not running 26585 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335. 26586 - When one of a hidden service's introduction points appears to be 26587 unreachable, stop trying it. Previously, we would keep trying 26588 to build circuits to the introduction point until we lost the 26589 descriptor, usually because the user gave up and restarted Tor. 26590 Partly fixes bug 3825. 26591 - Don't launch a useless circuit after failing to use one of a 26592 hidden service's introduction points. Previously, we would 26593 launch a new introduction circuit, but not set the hidden service 26594 which that circuit was intended to connect to, so it would never 26595 actually be used. A different piece of code would then create a 26596 new introduction circuit correctly. Bug reported by katmagic and 26597 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212. 26598 26599 o Major bugfixes (other): 26600 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections 26601 that they initiated. Relays could distinguish incoming bridge 26602 connections from client connections, creating another avenue for 26603 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha. 26604 Found by "frosty_un". 26605 - Don't update the AccountingSoftLimitHitAt state file entry whenever 26606 tor gets started. This prevents a wrong average bandwidth 26607 estimate, which would cause relays to always start a new accounting 26608 interval at the earliest possible moment. Fixes bug 2003; bugfix 26609 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped 26610 immensely in tracking this bug down. 26611 - Fix a crash bug when changing node restrictions while a DNS lookup 26612 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix 26613 by "Tey'". 26614 26615 o Minor bugfixes (on 0.2.2.x and earlier): 26616 - When a hidden service turns an extra service-side introduction 26617 circuit into a general-purpose circuit, free the rend_data and 26618 intro_key fields first, so we won't leak memory if the circuit 26619 is cannibalized for use as another service-side introduction 26620 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251. 26621 - Rephrase the log message emitted if the TestSocks check is 26622 successful. Patch from Fabian Keil; fixes bug 4094. 26623 - Bridges now skip DNS self-tests, to act a little more stealthily. 26624 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced 26625 bridges. Patch by "warms0x". 26626 - Remove a confusing dollar sign from the example fingerprint in the 26627 man page, and also make the example fingerprint a valid one. Fixes 26628 bug 4309; bugfix on 0.2.1.3-alpha. 26629 - Fix internal bug-checking logic that was supposed to catch 26630 failures in digest generation so that it will fail more robustly 26631 if we ask for a nonexistent algorithm. Found by Coverity Scan. 26632 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479. 26633 - Report any failure in init_keys() calls launched because our 26634 IP address has changed. Spotted by Coverity Scan. Bugfix on 26635 0.1.1.4-alpha; fixes CID 484. 26636 26637 o Minor bugfixes (on 0.2.3.x): 26638 - Fix a bug in configure.in that kept it from building a configure 26639 script with autoconf versions earlier than 2.61. Fixes bug 2430; 26640 bugfix on 0.2.3.1-alpha. 26641 - Don't warn users that they are exposing a client port to the 26642 Internet if they have specified an RFC1918 address. Previously, 26643 we would warn if the user had specified any non-loopback 26644 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas. 26645 - Fix memory leaks in the failing cases of the new SocksPort and 26646 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha; 26647 fixes coverity CIDs 485, 486, and 487. 26648 26649 o Minor features: 26650 - When a hidden service's introduction point times out, consider 26651 trying it again during the next attempt to connect to the 26652 HS. Previously, we would not try it again unless a newly fetched 26653 descriptor contained it. Required by fixes for bugs 1297 and 3825. 26654 - The next version of Windows will be called Windows 8, and it has 26655 a major version of 6, minor version of 2. Correctly identify that 26656 version instead of calling it "Very recent version". Resolves 26657 ticket 4153; reported by funkstar. 26658 - The Bridge Authority now writes statistics on how many bridge 26659 descriptors it gave out in total, and how many unique descriptors 26660 it gave out. It also lists how often the most and least commonly 26661 fetched descriptors were given out, as well as the median and 26662 25th/75th percentile. Implements tickets 4200 and 4294. 26663 - Update to the October 4 2011 Maxmind GeoLite Country database. 26664 26665 o Code simplifications and refactoring: 26666 - Remove some old code to remember statistics about which descriptors 26667 we've served as a directory mirror. The feature wasn't used and 26668 is outdated now that microdescriptors are around. 26669 - Rename Tor functions that turn strings into addresses, so that 26670 "parse" indicates that no hostname resolution occurs, and 26671 "lookup" indicates that hostname resolution may occur. This 26672 should help prevent mistakes in the future. Fixes bug 3512. 26673 26674 26675Changes in version 0.2.2.34 - 2011-10-26 26676 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker 26677 can deanonymize Tor users. Everybody should upgrade. 26678 26679 The attack relies on four components: 1) Clients reuse their TLS cert 26680 when talking to different relays, so relays can recognize a user by 26681 the identity key in her cert. 2) An attacker who knows the client's 26682 identity key can probe each guard relay to see if that identity key 26683 is connected to that guard relay right now. 3) A variety of active 26684 attacks in the literature (starting from "Low-Cost Traffic Analysis 26685 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to 26686 discover the guard relays that a Tor user visiting the website is using. 26687 4) Clients typically pick three guards at random, so the set of guards 26688 for a given user could well be a unique fingerprint for her. This 26689 release fixes components #1 and #2, which is enough to block the attack; 26690 the other two remain as open research problems. Special thanks to 26691 "frosty_un" for reporting the issue to us! 26692 26693 Clients should upgrade so they are no longer recognizable by the TLS 26694 certs they present. Relays should upgrade so they no longer allow a 26695 remote attacker to probe them to test whether unpatched clients are 26696 currently connected to them. 26697 26698 This release also fixes several vulnerabilities that allow an attacker 26699 to enumerate bridge relays. Some bridge enumeration attacks still 26700 remain; see for example proposal 188. 26701 26702 o Privacy/anonymity fixes (clients): 26703 - Clients and bridges no longer send TLS certificate chains on 26704 outgoing OR connections. Previously, each client or bridge would 26705 use the same cert chain for all outgoing OR connections until 26706 its IP address changes, which allowed any relay that the client 26707 or bridge contacted to determine which entry guards it is using. 26708 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un". 26709 - If a relay receives a CREATE_FAST cell on a TLS connection, it 26710 no longer considers that connection as suitable for satisfying a 26711 circuit EXTEND request. Now relays can protect clients from the 26712 CVE-2011-2768 issue even if the clients haven't upgraded yet. 26713 - Directory authorities no longer assign the Guard flag to relays 26714 that haven't upgraded to the above "refuse EXTEND requests 26715 to client connections" fix. Now directory authorities can 26716 protect clients from the CVE-2011-2768 issue even if neither 26717 the clients nor the relays have upgraded yet. There's a new 26718 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option 26719 to let us transition smoothly, else tomorrow there would be no 26720 guard relays. 26721 26722 o Privacy/anonymity fixes (bridge enumeration): 26723 - Bridge relays now do their directory fetches inside Tor TLS 26724 connections, like all the other clients do, rather than connecting 26725 directly to the DirPort like public relays do. Removes another 26726 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35. 26727 - Bridges relays now build circuits for themselves in a more similar 26728 way to how clients build them. Removes another avenue for 26729 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha, 26730 when bridges were introduced. 26731 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections 26732 that they initiated. Relays could distinguish incoming bridge 26733 connections from client connections, creating another avenue for 26734 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha. 26735 Found by "frosty_un". 26736 26737 o Major bugfixes: 26738 - Fix a crash bug when changing node restrictions while a DNS lookup 26739 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix 26740 by "Tey'". 26741 - Don't launch a useless circuit after failing to use one of a 26742 hidden service's introduction points. Previously, we would 26743 launch a new introduction circuit, but not set the hidden service 26744 which that circuit was intended to connect to, so it would never 26745 actually be used. A different piece of code would then create a 26746 new introduction circuit correctly. Bug reported by katmagic and 26747 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212. 26748 26749 o Minor bugfixes: 26750 - Change an integer overflow check in the OpenBSD_Malloc code so 26751 that GCC is less likely to eliminate it as impossible. Patch 26752 from Mansour Moufid. Fixes bug 4059. 26753 - When a hidden service turns an extra service-side introduction 26754 circuit into a general-purpose circuit, free the rend_data and 26755 intro_key fields first, so we won't leak memory if the circuit 26756 is cannibalized for use as another service-side introduction 26757 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251. 26758 - Bridges now skip DNS self-tests, to act a little more stealthily. 26759 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced 26760 bridges. Patch by "warms0x". 26761 - Fix internal bug-checking logic that was supposed to catch 26762 failures in digest generation so that it will fail more robustly 26763 if we ask for a nonexistent algorithm. Found by Coverity Scan. 26764 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479. 26765 - Report any failure in init_keys() calls launched because our 26766 IP address has changed. Spotted by Coverity Scan. Bugfix on 26767 0.1.1.4-alpha; fixes CID 484. 26768 26769 o Minor bugfixes (log messages and documentation): 26770 - Remove a confusing dollar sign from the example fingerprint in the 26771 man page, and also make the example fingerprint a valid one. Fixes 26772 bug 4309; bugfix on 0.2.1.3-alpha. 26773 - The next version of Windows will be called Windows 8, and it has 26774 a major version of 6, minor version of 2. Correctly identify that 26775 version instead of calling it "Very recent version". Resolves 26776 ticket 4153; reported by funkstar. 26777 - Downgrade log messages about circuit timeout calibration from 26778 "notice" to "info": they don't require or suggest any human 26779 intervention. Patch from Tom Lowenthal. Fixes bug 4063; 26780 bugfix on 0.2.2.14-alpha. 26781 26782 o Minor features: 26783 - Turn on directory request statistics by default and include them in 26784 extra-info descriptors. Don't break if we have no GeoIP database. 26785 Backported from 0.2.3.1-alpha; implements ticket 3951. 26786 - Update to the October 4 2011 Maxmind GeoLite Country database. 26787 26788 26789Changes in version 0.2.1.31 - 2011-10-26 26790 Tor 0.2.1.31 backports important security and privacy fixes for 26791 oldstable. This release is intended only for package maintainers and 26792 others who cannot use the 0.2.2 stable series. All others should be 26793 using Tor 0.2.2.x or newer. 26794 26795 o Security fixes (also included in 0.2.2.x): 26796 - Replace all potentially sensitive memory comparison operations 26797 with versions whose runtime does not depend on the data being 26798 compared. This will help resist a class of attacks where an 26799 adversary can use variations in timing information to learn 26800 sensitive data. Fix for one case of bug 3122. (Safe memcmp 26801 implementation by Robert Ransom based partially on code by DJB.) 26802 - Fix an assert in parsing router descriptors containing IPv6 26803 addresses. This one took down the directory authorities when 26804 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha. 26805 26806 o Privacy/anonymity fixes (also included in 0.2.2.x): 26807 - Clients and bridges no longer send TLS certificate chains on 26808 outgoing OR connections. Previously, each client or bridge would 26809 use the same cert chain for all outgoing OR connections until 26810 its IP address changes, which allowed any relay that the client 26811 or bridge contacted to determine which entry guards it is using. 26812 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un". 26813 - If a relay receives a CREATE_FAST cell on a TLS connection, it 26814 no longer considers that connection as suitable for satisfying a 26815 circuit EXTEND request. Now relays can protect clients from the 26816 CVE-2011-2768 issue even if the clients haven't upgraded yet. 26817 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections 26818 that they initiated. Relays could distinguish incoming bridge 26819 connections from client connections, creating another avenue for 26820 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha. 26821 Found by "frosty_un". 26822 - When receiving a hidden service descriptor, check that it is for 26823 the hidden service we wanted. Previously, Tor would store any 26824 hidden service descriptors that a directory gave it, whether it 26825 wanted them or not. This wouldn't have let an attacker impersonate 26826 a hidden service, but it did let directories pre-seed a client 26827 with descriptors that it didn't want. Bugfix on 0.0.6. 26828 - Avoid linkability based on cached hidden service descriptors: forget 26829 all hidden service descriptors cached as a client when processing a 26830 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6. 26831 - Make the bridge directory authority refuse to answer directory 26832 requests for "all" descriptors. It used to include bridge 26833 descriptors in its answer, which was a major information leak. 26834 Found by "piebeer". Bugfix on 0.2.0.3-alpha. 26835 - Don't attach new streams to old rendezvous circuits after SIGNAL 26836 NEWNYM. Previously, we would keep using an existing rendezvous 26837 circuit if it remained open (i.e. if it were kept open by a 26838 long-lived stream, or if a new stream were attached to it before 26839 Tor could notice that it was old and no longer in use). Bugfix on 26840 0.1.1.15-rc; fixes bug 3375. 26841 26842 o Minor bugfixes (also included in 0.2.2.x): 26843 - When we restart our relay, we might get a successful connection 26844 from the outside before we've started our reachability tests, 26845 triggering a warning: "ORPort found reachable, but I have no 26846 routerinfo yet. Failing to inform controller of success." This 26847 bug was harmless unless Tor is running under a controller 26848 like Vidalia, in which case the controller would never get a 26849 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha; 26850 fixes bug 1172. 26851 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings 26852 enabled. Fixes bug 1526. 26853 - Remove undocumented option "-F" from tor-resolve: it hasn't done 26854 anything since 0.2.1.16-rc. 26855 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned. 26856 None of the cases where we did this before were wrong, but by making 26857 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28. 26858 - Fix a rare crash bug that could occur when a client was configured 26859 with a large number of bridges. Fixes bug 2629; bugfix on 26860 0.2.1.2-alpha. Bugfix by trac user "shitlei". 26861 - Correct the warning displayed when a rendezvous descriptor exceeds 26862 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by 26863 John Brooks. 26864 - Fix an uncommon assertion failure when running with DNSPort under 26865 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha. 26866 - When warning about missing zlib development packages during compile, 26867 give the correct package names. Bugfix on 0.2.0.1-alpha. 26868 - Require that introduction point keys and onion keys have public 26869 exponent 65537. Bugfix on 0.2.0.10-alpha. 26870 - Do not crash when our configuration file becomes unreadable, for 26871 example due to a permissions change, between when we start up 26872 and when a controller calls SAVECONF. Fixes bug 3135; bugfix 26873 on 0.0.9pre6. 26874 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option. 26875 Fixes bug 3208. 26876 - Always NUL-terminate the sun_path field of a sockaddr_un before 26877 passing it to the kernel. (Not a security issue: kernels are 26878 smart enough to reject bad sockaddr_uns.) Found by Coverity; 26879 CID #428. Bugfix on Tor 0.2.0.3-alpha. 26880 - Don't stack-allocate the list of supplementary GIDs when we're 26881 about to log them. Stack-allocating NGROUPS_MAX gid_t elements 26882 could take up to 256K, which is way too much stack. Found by 26883 Coverity; CID #450. Bugfix on 0.2.1.7-alpha. 26884 26885 o Minor bugfixes (only in 0.2.1.x): 26886 - Resume using micro-version numbers in 0.2.1.x: our Debian packages 26887 rely on them. Bugfix on 0.2.1.30. 26888 - Use git revisions instead of svn revisions when generating our 26889 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402. 26890 26891 o Minor features (also included in 0.2.2.x): 26892 - Adjust the expiration time on our SSL session certificates to 26893 better match SSL certs seen in the wild. Resolves ticket 4014. 26894 - Allow nameservers with IPv6 address. Resolves bug 2574. 26895 - Update to the October 4 2011 Maxmind GeoLite Country database. 26896 26897 26898Changes in version 0.2.3.5-alpha - 2011-09-28 26899 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate 26900 bridge relays; fixes an assertion error that many users started hitting 26901 today; and adds the ability to refill token buckets more often than 26902 once per second, allowing significant performance improvements. 26903 26904 o Security fixes: 26905 - Bridge relays now do their directory fetches inside Tor TLS 26906 connections, like all the other clients do, rather than connecting 26907 directly to the DirPort like public relays do. Removes another 26908 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35. 26909 - Bridges relays now build circuits for themselves in a more similar 26910 way to how clients build them. Removes another avenue for 26911 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha, 26912 when bridges were introduced. 26913 26914 o Major bugfixes: 26915 - Fix an "Assertion md->held_by_node == 1 failed" error that could 26916 occur when the same microdescriptor was referenced by two node_t 26917 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha. 26918 26919 o Major features (networking): 26920 - Add a new TokenBucketRefillInterval option to refill token buckets 26921 more frequently than once per second. This should improve network 26922 performance, alleviate queueing problems, and make traffic less 26923 bursty. Implements proposal 183; closes ticket 3630. Design by 26924 Florian Tschorsch and Björn Scheuermann; implementation by 26925 Florian Tschorsch. 26926 26927 o Minor bugfixes: 26928 - Change an integer overflow check in the OpenBSD_Malloc code so 26929 that GCC is less likely to eliminate it as impossible. Patch 26930 from Mansour Moufid. Fixes bug 4059. 26931 26932 o Minor bugfixes (usability): 26933 - Downgrade log messages about circuit timeout calibration from 26934 "notice" to "info": they don't require or suggest any human 26935 intervention. Patch from Tom Lowenthal. Fixes bug 4063; 26936 bugfix on 0.2.2.14-alpha. 26937 26938 o Minor features (diagnostics): 26939 - When the system call to create a listener socket fails, log the 26940 error message explaining why. This may help diagnose bug 4027. 26941 26942 26943Changes in version 0.2.3.4-alpha - 2011-09-13 26944 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight 26945 tweak to Tor's TLS handshake that makes relays and bridges that run 26946 this new version reachable from Iran again. It also fixes a few new 26947 bugs in 0.2.3.x, and teaches relays to recognize when they're not 26948 listed in the network consensus and republish. 26949 26950 o Major bugfixes (also part of 0.2.2.33): 26951 - Avoid an assertion failure when reloading a configuration with 26952 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug 26953 3923; bugfix on 0.2.2.25-alpha. 26954 26955 o Minor features (security, also part of 0.2.2.33): 26956 - Check for replays of the public-key encrypted portion of an 26957 INTRODUCE1 cell, in addition to the current check for replays of 26958 the g^x value. This prevents a possible class of active attacks 26959 by an attacker who controls both an introduction point and a 26960 rendezvous point, and who uses the malleability of AES-CTR to 26961 alter the encrypted g^x portion of the INTRODUCE1 cell. We think 26962 that these attacks are infeasible (requiring the attacker to send 26963 on the order of zettabytes of altered cells in a short interval), 26964 but we'd rather block them off in case there are any classes of 26965 this attack that we missed. Reported by Willem Pinckaers. 26966 26967 o Minor features (also part of 0.2.2.33): 26968 - Adjust the expiration time on our SSL session certificates to 26969 better match SSL certs seen in the wild. Resolves ticket 4014. 26970 - Change the default required uptime for a relay to be accepted as 26971 a HSDir (hidden service directory) from 24 hours to 25 hours. 26972 Improves on 0.2.0.10-alpha; resolves ticket 2649. 26973 - Add a VoteOnHidServDirectoriesV2 config option to allow directory 26974 authorities to abstain from voting on assignment of the HSDir 26975 consensus flag. Related to bug 2649. 26976 - Update to the September 6 2011 Maxmind GeoLite Country database. 26977 26978 o Minor bugfixes (also part of 0.2.2.33): 26979 - Demote the 'replay detected' log message emitted when a hidden 26980 service receives the same Diffie-Hellman public key in two different 26981 INTRODUCE2 cells to info level. A normal Tor client can cause that 26982 log message during its normal operation. Bugfix on 0.2.1.6-alpha; 26983 fixes part of bug 2442. 26984 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info 26985 level. There is nothing that a hidden service's operator can do 26986 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part 26987 of bug 2442. 26988 - Clarify a log message specifying the characters permitted in 26989 HiddenServiceAuthorizeClient client names. Previously, the log 26990 message said that "[A-Za-z0-9+-_]" were permitted; that could have 26991 given the impression that every ASCII character between "+" and "_" 26992 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha. 26993 26994 o Build fixes (also part of 0.2.2.33): 26995 - Clean up some code issues that prevented Tor from building on older 26996 BSDs. Fixes bug 3894; reported by "grarpamp". 26997 - Search for a platform-specific version of "ar" when cross-compiling. 26998 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti. 26999 27000 o Major bugfixes: 27001 - Fix a bug where the SocksPort option (for example) would get 27002 ignored and replaced by the default if a SocksListenAddress 27003 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by 27004 Fabian Keil. 27005 27006 o Major features: 27007 - Relays now try regenerating and uploading their descriptor more 27008 frequently if they are not listed in the consensus, or if the 27009 version of their descriptor listed in the consensus is too 27010 old. This fix should prevent situations where a server declines 27011 to re-publish itself because it has done so too recently, even 27012 though the authorities decided not to list its recent-enough 27013 descriptor. Fix for bug 3327. 27014 27015 o Minor features: 27016 - Relays now include a reason for regenerating their descriptors 27017 in an HTTP header when uploading to the authorities. This will 27018 make it easier to debug descriptor-upload issues in the future. 27019 - When starting as root and then changing our UID via the User 27020 control option, and we have a ControlSocket configured, make sure 27021 that the ControlSocket is owned by the same account that Tor will 27022 run under. Implements ticket 3421; fix by Jérémy Bobbio. 27023 27024 o Minor bugfixes: 27025 - Abort if tor_vasprintf fails in connection_printf_to_buf (a 27026 utility function used in the control-port code). This shouldn't 27027 ever happen unless Tor is completely out of memory, but if it did 27028 happen and Tor somehow recovered from it, Tor could have sent a log 27029 message to a control port in the middle of a reply to a controller 27030 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha. 27031 - Make 'FetchUselessDescriptors' cause all descriptor types and 27032 all consensus types (including microdescriptors) to get fetched. 27033 Fixes bug 3851; bugfix on 0.2.3.1-alpha. 27034 27035 o Code refactoring: 27036 - Make a new "entry connection" struct as an internal subtype of "edge 27037 connection", to simplify the code and make exit connections smaller. 27038 27039 27040Changes in version 0.2.2.33 - 2011-09-13 27041 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's 27042 TLS handshake that makes relays and bridges that run this new version 27043 reachable from Iran again. 27044 27045 o Major bugfixes: 27046 - Avoid an assertion failure when reloading a configuration with 27047 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug 27048 3923; bugfix on 0.2.2.25-alpha. 27049 27050 o Minor features (security): 27051 - Check for replays of the public-key encrypted portion of an 27052 INTRODUCE1 cell, in addition to the current check for replays of 27053 the g^x value. This prevents a possible class of active attacks 27054 by an attacker who controls both an introduction point and a 27055 rendezvous point, and who uses the malleability of AES-CTR to 27056 alter the encrypted g^x portion of the INTRODUCE1 cell. We think 27057 that these attacks are infeasible (requiring the attacker to send 27058 on the order of zettabytes of altered cells in a short interval), 27059 but we'd rather block them off in case there are any classes of 27060 this attack that we missed. Reported by Willem Pinckaers. 27061 27062 o Minor features: 27063 - Adjust the expiration time on our SSL session certificates to 27064 better match SSL certs seen in the wild. Resolves ticket 4014. 27065 - Change the default required uptime for a relay to be accepted as 27066 a HSDir (hidden service directory) from 24 hours to 25 hours. 27067 Improves on 0.2.0.10-alpha; resolves ticket 2649. 27068 - Add a VoteOnHidServDirectoriesV2 config option to allow directory 27069 authorities to abstain from voting on assignment of the HSDir 27070 consensus flag. Related to bug 2649. 27071 - Update to the September 6 2011 Maxmind GeoLite Country database. 27072 27073 o Minor bugfixes (documentation and log messages): 27074 - Correct the man page to explain that HashedControlPassword and 27075 CookieAuthentication can both be set, in which case either method 27076 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha, 27077 when we decided to allow these config options to both be set. Issue 27078 raised by bug 3898. 27079 - Demote the 'replay detected' log message emitted when a hidden 27080 service receives the same Diffie-Hellman public key in two different 27081 INTRODUCE2 cells to info level. A normal Tor client can cause that 27082 log message during its normal operation. Bugfix on 0.2.1.6-alpha; 27083 fixes part of bug 2442. 27084 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info 27085 level. There is nothing that a hidden service's operator can do 27086 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part 27087 of bug 2442. 27088 - Clarify a log message specifying the characters permitted in 27089 HiddenServiceAuthorizeClient client names. Previously, the log 27090 message said that "[A-Za-z0-9+-_]" were permitted; that could have 27091 given the impression that every ASCII character between "+" and "_" 27092 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha. 27093 27094 o Build fixes: 27095 - Provide a substitute implementation of lround() for MSVC, which 27096 apparently lacks it. Patch from Gisle Vanem. 27097 - Clean up some code issues that prevented Tor from building on older 27098 BSDs. Fixes bug 3894; reported by "grarpamp". 27099 - Search for a platform-specific version of "ar" when cross-compiling. 27100 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti. 27101 27102 27103Changes in version 0.2.3.3-alpha - 2011-09-01 27104 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's 27105 security, and provides client-side support for the microdescriptor 27106 and optimistic data features introduced earlier in the 0.2.3.x 27107 series. It also includes numerous critical bugfixes in the (optional) 27108 bufferevent-based networking backend. 27109 27110 o Major features (stream isolation): 27111 - You can now configure Tor so that streams from different 27112 applications are isolated on different circuits, to prevent an 27113 attacker who sees your streams as they leave an exit node from 27114 linking your sessions to one another. To do this, choose some way 27115 to distinguish the applications: have them connect to different 27116 SocksPorts, or have one of them use SOCKS4 while the other uses 27117 SOCKS5, or have them pass different authentication strings to the 27118 SOCKS proxy. Then, use the new SocksPort syntax to configure the 27119 degree of isolation you need. This implements Proposal 171. 27120 - There's a new syntax for specifying multiple client ports (such as 27121 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare 27122 multiple *Port entries with full addr:port syntax on each. 27123 The old *ListenAddress format is still supported, but you can't 27124 mix it with the new *Port syntax. 27125 27126 o Major features (other): 27127 - Enable microdescriptor fetching by default for clients. This allows 27128 clients to download a much smaller amount of directory information. 27129 To disable it (and go back to the old-style consensus and 27130 descriptors), set "UseMicrodescriptors 0" in your torrc file. 27131 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the 27132 "PortForwarding" config option), now supports Windows. 27133 - When using an exit relay running 0.2.3.x, clients can now 27134 "optimistically" send data before the exit relay reports that 27135 the stream has opened. This saves a round trip when starting 27136 connections where the client speaks first (such as web browsing). 27137 This behavior is controlled by a consensus parameter (currently 27138 disabled). To turn it on or off manually, use the "OptimisticData" 27139 torrc option. Implements proposal 181; code by Ian Goldberg. 27140 27141 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha): 27142 - When using IOCP on Windows, we need to enable Libevent windows 27143 threading support. 27144 - The IOCP backend now works even when the user has not specified 27145 the (internal, debugging-only) _UseFilteringSSLBufferevents option. 27146 Fixes part of bug 3752. 27147 - Correctly record the bytes we've read and written when using 27148 bufferevents, so that we can include them in our bandwidth history 27149 and advertised bandwidth. Fixes bug 3803. 27150 - Apply rate-limiting only at the bottom of a chain of filtering 27151 bufferevents. This prevents us from filling up internal read 27152 buffers and violating rate-limits when filtering bufferevents 27153 are enabled. Fixes part of bug 3804. 27154 - Add high-watermarks to the output buffers for filtered 27155 bufferevents. This prevents us from filling up internal write 27156 buffers and wasting CPU cycles when filtering bufferevents are 27157 enabled. Fixes part of bug 3804. 27158 - Correctly notice when data has been written from a bufferevent 27159 without flushing it completely. Fixes bug 3805. 27160 - Fix a bug where server-side tunneled bufferevent-based directory 27161 streams would get closed prematurely. Fixes bug 3814. 27162 - Fix a use-after-free error with per-connection rate-limiting 27163 buckets. Fixes bug 3888. 27164 27165 o Major bugfixes (also part of 0.2.2.31-rc): 27166 - If we're configured to write our ControlPorts to disk, only write 27167 them after switching UID and creating the data directory. This way, 27168 we don't fail when starting up with a nonexistent DataDirectory 27169 and a ControlPortWriteToFile setting based on that directory. Fixes 27170 bug 3747; bugfix on Tor 0.2.2.26-beta. 27171 27172 o Minor features: 27173 - Added a new CONF_CHANGED event so that controllers can be notified 27174 of any configuration changes made by other controllers, or by the 27175 user. Implements ticket 1692. 27176 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory 27177 leak when using bufferevents, and lets Libevent worry about how to 27178 best copy data out of a buffer. 27179 - Replace files in stats/ rather than appending to them. Now that we 27180 include statistics in extra-info descriptors, it makes no sense to 27181 keep old statistics forever. Implements ticket 2930. 27182 27183 o Minor features (build compatibility): 27184 - Limited, experimental support for building with nmake and MSVC. 27185 - Provide a substitute implementation of lround() for MSVC, which 27186 apparently lacks it. Patch from Gisle Vanem. 27187 27188 o Minor features (also part of 0.2.2.31-rc): 27189 - Update to the August 2 2011 Maxmind GeoLite Country database. 27190 27191 o Minor bugfixes (on 0.2.3.x-alpha): 27192 - Fix a spurious warning when parsing SOCKS requests with 27193 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha. 27194 - Get rid of a harmless warning that could happen on relays running 27195 with bufferevents. The warning was caused by someone doing an http 27196 request to a relay's orport. Also don't warn for a few related 27197 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha. 27198 27199 o Minor bugfixes (on 2.2.x and earlier): 27200 - Correct the man page to explain that HashedControlPassword and 27201 CookieAuthentication can both be set, in which case either method 27202 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha, 27203 when we decided to allow these config options to both be set. Issue 27204 raised by bug 3898. 27205 - The "--quiet" and "--hush" options now apply not only to Tor's 27206 behavior before logs are configured, but also to Tor's behavior in 27207 the absence of configured logs. Fixes bug 3550; bugfix on 27208 0.2.0.10-alpha. 27209 27210 o Minor bugfixes (also part of 0.2.2.31-rc): 27211 - Write several files in text mode, on OSes that distinguish text 27212 mode from binary mode (namely, Windows). These files are: 27213 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays 27214 that collect those statistics; 'client_keys' and 'hostname' for 27215 hidden services that use authentication; and (in the tor-gencert 27216 utility) newly generated identity and signing keys. Previously, 27217 we wouldn't specify text mode or binary mode, leading to an 27218 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when 27219 the DirRecordUsageByCountry option which would have triggered 27220 the assertion failure was added), although this assertion failure 27221 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha. 27222 - Selectively disable deprecation warnings on OS X because Lion 27223 started deprecating the shipped copy of openssl. Fixes bug 3643. 27224 - Remove an extra pair of quotation marks around the error 27225 message in control-port STATUS_GENERAL BUG events. Bugfix on 27226 0.1.2.6-alpha; fixes bug 3732. 27227 - When unable to format an address as a string, report its value 27228 as "???" rather than reusing the last formatted address. Bugfix 27229 on 0.2.1.5-alpha. 27230 27231 o Code simplifications and refactoring: 27232 - Rewrite the listener-selection logic so that parsing which ports 27233 we want to listen on is now separate from binding to the ports 27234 we want. 27235 27236 o Build changes: 27237 - Building Tor with bufferevent support now requires Libevent 27238 2.0.13-stable or later. Previous versions of Libevent had bugs in 27239 SSL-related bufferevents and related issues that would make Tor 27240 work badly with bufferevents. Requiring 2.0.13-stable also allows 27241 Tor with bufferevents to take advantage of Libevent APIs 27242 introduced after 2.0.8-rc. 27243 27244 27245Changes in version 0.2.2.32 - 2011-08-27 27246 The Tor 0.2.2 release series is dedicated to the memory of Andreas 27247 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research, 27248 a founder of the PETS community, a leader in our field, a mentor, 27249 and a friend. He left us with these words: "I had the possibility 27250 to contribute to this world that is not as it should be. I hope I 27251 could help in some areas to make the world a better place, and that 27252 I could also encourage other people to be engaged in improving the 27253 world. Please, stay engaged. This world needs you, your love, your 27254 initiative -- now I cannot be part of that anymore." 27255 27256 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally 27257 ready. More than two years in the making, this release features improved 27258 client performance and hidden service reliability, better compatibility 27259 for Android, correct behavior for bridges that listen on more than 27260 one address, more extensible and flexible directory object handling, 27261 better reporting of network statistics, improved code security, and 27262 many many other features and bugfixes. 27263 27264 27265Changes in version 0.2.2.31-rc - 2011-08-17 27266 Tor 0.2.2.31-rc is the second and hopefully final release candidate 27267 for the Tor 0.2.2.x series. 27268 27269 o Major bugfixes: 27270 - Remove an extra pair of quotation marks around the error 27271 message in control-port STATUS_GENERAL BUG events. Bugfix on 27272 0.1.2.6-alpha; fixes bug 3732. 27273 - If we're configured to write our ControlPorts to disk, only write 27274 them after switching UID and creating the data directory. This way, 27275 we don't fail when starting up with a nonexistent DataDirectory 27276 and a ControlPortWriteToFile setting based on that directory. Fixes 27277 bug 3747; bugfix on Tor 0.2.2.26-beta. 27278 27279 o Minor features: 27280 - Update to the August 2 2011 Maxmind GeoLite Country database. 27281 27282 o Minor bugfixes: 27283 - Allow GETINFO fingerprint to return a fingerprint even when 27284 we have not yet built a router descriptor. Fixes bug 3577; 27285 bugfix on 0.2.0.1-alpha. 27286 - Write several files in text mode, on OSes that distinguish text 27287 mode from binary mode (namely, Windows). These files are: 27288 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays 27289 that collect those statistics; 'client_keys' and 'hostname' for 27290 hidden services that use authentication; and (in the tor-gencert 27291 utility) newly generated identity and signing keys. Previously, 27292 we wouldn't specify text mode or binary mode, leading to an 27293 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when 27294 the DirRecordUsageByCountry option which would have triggered 27295 the assertion failure was added), although this assertion failure 27296 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha. 27297 - Selectively disable deprecation warnings on OS X because Lion 27298 started deprecating the shipped copy of openssl. Fixes bug 3643. 27299 - When unable to format an address as a string, report its value 27300 as "???" rather than reusing the last formatted address. Bugfix 27301 on 0.2.1.5-alpha. 27302 27303 27304Changes in version 0.2.3.2-alpha - 2011-07-18 27305 Tor 0.2.3.2-alpha introduces two new experimental features: 27306 microdescriptors and pluggable transports. It also continues cleaning 27307 up a variety of recently introduced features. 27308 27309 o Major features: 27310 - Clients can now use microdescriptors instead of regular descriptors 27311 to build circuits. Microdescriptors are authority-generated 27312 summaries of regular descriptors' contents, designed to change 27313 very rarely (see proposal 158 for details). This feature is 27314 designed to save bandwidth, especially for clients on slow internet 27315 connections. It's off by default for now, since nearly no caches 27316 support it, but it will be on-by-default for clients in a future 27317 version. You can use the UseMicrodescriptors option to turn it on. 27318 - Tor clients using bridges can now be configured to use a separate 27319 'transport' proxy for each bridge. This approach helps to resist 27320 censorship by allowing bridges to use protocol obfuscation 27321 plugins. It implements part of proposal 180. Implements ticket 2841. 27322 - While we're trying to bootstrap, record how many TLS connections 27323 fail in each state, and report which states saw the most failures 27324 in response to any bootstrap failures. This feature may speed up 27325 diagnosis of censorship events. Implements ticket 3116. 27326 27327 o Major bugfixes (on 0.2.3.1-alpha): 27328 - When configuring a large set of nodes in EntryNodes (as with 27329 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a 27330 random subset to be guards, and choose them in random 27331 order. Fixes bug 2798. 27332 - Tor could crash when remembering a consensus in a non-used consensus 27333 flavor without having a current consensus set. Fixes bug 3361. 27334 - Comparing an unknown address to a microdescriptor's shortened exit 27335 policy would always give a "rejected" result. Fixes bug 3599. 27336 - Using microdescriptors as a client no longer prevents Tor from 27337 uploading and downloading hidden service descriptors. Fixes 27338 bug 3601. 27339 27340 o Minor features: 27341 - Allow nameservers with IPv6 address. Resolves bug 2574. 27342 - Accept attempts to include a password authenticator in the 27343 handshake, as supported by SOCKS5. This handles SOCKS clients that 27344 don't know how to omit a password when authenticating. Resolves 27345 bug 1666. 27346 - When configuring a large set of nodes in EntryNodes, and there are 27347 enough of them listed as Guard so that we don't need to consider 27348 the non-guard entries, prefer the ones listed with the Guard flag. 27349 - Check for and recover from inconsistency in the microdescriptor 27350 cache. This will make it harder for us to accidentally free a 27351 microdescriptor without removing it from the appropriate data 27352 structures. Fixes issue 3135; issue noted by "wanoskarnet". 27353 - Log SSL state transitions at log level DEBUG, log domain 27354 HANDSHAKE. This can be useful for debugging censorship events. 27355 Implements ticket 3264. 27356 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri; 27357 implements ticket 3439. 27358 27359 o Minor bugfixes (on 0.2.3.1-alpha): 27360 - Do not free all general-purpose regular descriptors just 27361 because microdescriptor use is enabled. Fixes bug 3113. 27362 - Correctly link libevent_openssl when --enable-static-libevent 27363 is passed to configure. Fixes bug 3118. 27364 - Bridges should not complain during their heartbeat log messages that 27365 they are unlisted in the consensus: that's more or less the point 27366 of being a bridge. Fixes bug 3183. 27367 - Report a SIGNAL event to controllers when acting on a delayed 27368 SIGNAL NEWNYM command. Previously, we would report a SIGNAL 27369 event to the controller if we acted on a SIGNAL NEWNYM command 27370 immediately, and otherwise not report a SIGNAL event for the 27371 command at all. Fixes bug 3349. 27372 - Fix a crash when handling the SIGNAL controller command or 27373 reporting ERR-level status events with bufferevents enabled. Found 27374 by Robert Ransom. Fixes bug 3367. 27375 - Always ship the tor-fw-helper manpage in our release tarballs. 27376 Fixes bug 3389. Reported by Stephen Walker. 27377 - Fix a class of double-mark-for-close bugs when bufferevents 27378 are enabled. Fixes bug 3403. 27379 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434. 27380 - Add SIGNAL to the list returned by the 'GETINFO events/names' 27381 control-port command. Fixes part of bug 3465. 27382 - Prevent using negative indices during unit test runs when read_all() 27383 fails. Spotted by coverity. 27384 - Fix a rare memory leak when checking the nodelist without it being 27385 present. Found by coverity. 27386 - Only try to download a microdescriptor-flavored consensus from 27387 a directory cache that provides them. 27388 27389 o Minor bugfixes (on 0.2.2.x and earlier): 27390 - Assert that hidden-service-related operations are not performed 27391 using single-hop circuits. Previously, Tor would assert that 27392 client-side streams are not attached to single-hop circuits, 27393 but not that other sensitive operations on the client and service 27394 side are not performed using single-hop circuits. Fixes bug 3332; 27395 bugfix on 0.0.6. 27396 - Don't publish a new relay descriptor when we reload our onion key, 27397 unless the onion key has actually changed. Fixes bug 3263 and 27398 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha. 27399 - Allow GETINFO fingerprint to return a fingerprint even when 27400 we have not yet built a router descriptor. Fixes bug 3577; 27401 bugfix on 0.2.0.1-alpha. 27402 - Make 'tor --digests' list hashes of all Tor source files. Bugfix 27403 on 0.2.2.4-alpha; fixes bug 3427. 27404 27405 o Code simplification and refactoring: 27406 - Use tor_sscanf() in place of scanf() in more places through the 27407 code. This makes us a little more locale-independent, and 27408 should help shut up code-analysis tools that can't tell 27409 a safe sscanf string from a dangerous one. 27410 - Use tt_assert(), not tor_assert(), for checking for test failures. 27411 This makes the unit tests more able to go on in the event that 27412 one of them fails. 27413 - Split connection_about_to_close() into separate functions for each 27414 connection type. 27415 27416 o Build changes: 27417 - On Windows, we now define the _WIN32_WINNT macros only if they 27418 are not already defined. This lets the person building Tor decide, 27419 if they want, to require a later version of Windows. 27420 27421 27422Changes in version 0.2.2.30-rc - 2011-07-07 27423 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x 27424 series. It fixes a few smaller bugs, but generally appears stable. 27425 Please test it and let us know whether it is! 27426 27427 o Minor bugfixes: 27428 - Send a SUCCEEDED stream event to the controller when a reverse 27429 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue 27430 discovered by katmagic. 27431 - Always NUL-terminate the sun_path field of a sockaddr_un before 27432 passing it to the kernel. (Not a security issue: kernels are 27433 smart enough to reject bad sockaddr_uns.) Found by Coverity; 27434 CID #428. Bugfix on Tor 0.2.0.3-alpha. 27435 - Don't stack-allocate the list of supplementary GIDs when we're 27436 about to log them. Stack-allocating NGROUPS_MAX gid_t elements 27437 could take up to 256K, which is way too much stack. Found by 27438 Coverity; CID #450. Bugfix on 0.2.1.7-alpha. 27439 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO 27440 events/names' control-port command. Bugfix on 0.2.2.9-alpha; 27441 fixes part of bug 3465. 27442 - Fix a memory leak when receiving a descriptor for a hidden 27443 service we didn't ask for. Found by Coverity; CID #30. Bugfix 27444 on 0.2.2.26-beta. 27445 27446 o Minor features: 27447 - Update to the July 1 2011 Maxmind GeoLite Country database. 27448 27449 27450Changes in version 0.2.2.29-beta - 2011-06-20 27451 Tor 0.2.2.29-beta reverts an accidental behavior change for users who 27452 have bridge lines in their torrc but don't want to use them; gets 27453 us closer to having the control socket feature working on Debian; 27454 and fixes a variety of smaller bugs. 27455 27456 o Major bugfixes: 27457 - Revert the UseBridges option to its behavior before 0.2.2.28-beta. 27458 When we changed the default behavior to "use bridges if any 27459 are listed in the torrc", we surprised users who had bridges 27460 in their torrc files but who didn't actually want to use them. 27461 Partial resolution for bug 3354. 27462 27463 o Privacy fixes: 27464 - Don't attach new streams to old rendezvous circuits after SIGNAL 27465 NEWNYM. Previously, we would keep using an existing rendezvous 27466 circuit if it remained open (i.e. if it were kept open by a 27467 long-lived stream, or if a new stream were attached to it before 27468 Tor could notice that it was old and no longer in use). Bugfix on 27469 0.1.1.15-rc; fixes bug 3375. 27470 27471 o Minor bugfixes: 27472 - Fix a bug when using ControlSocketsGroupWritable with User. The 27473 directory's group would be checked against the current group, not 27474 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393; 27475 bugfix on 0.2.2.26-beta. 27476 - Make connection_printf_to_buf()'s behavior sane. Its callers 27477 expect it to emit a CRLF iff the format string ends with CRLF; 27478 it actually emitted a CRLF iff (a) the format string ended with 27479 CRLF or (b) the resulting string was over 1023 characters long or 27480 (c) the format string did not end with CRLF *and* the resulting 27481 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha; 27482 fixes part of bug 3407. 27483 - Make send_control_event_impl()'s behavior sane. Its callers 27484 expect it to always emit a CRLF at the end of the string; it 27485 might have emitted extra control characters as well. Bugfix on 27486 0.1.1.9-alpha; fixes another part of bug 3407. 27487 - Make crypto_rand_int() check the value of its input correctly. 27488 Previously, it accepted values up to UINT_MAX, but could return a 27489 negative number if given a value above INT_MAX+1. Found by George 27490 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14. 27491 - Avoid a segfault when reading a malformed circuit build state 27492 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on 27493 0.2.2.4-alpha. 27494 - When asked about a DNS record type we don't support via a 27495 client DNSPort, reply with NOTIMPL rather than an empty 27496 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha. 27497 - Fix a rare memory leak during stats writing. Found by coverity. 27498 27499 o Minor features: 27500 - Update to the June 1 2011 Maxmind GeoLite Country database. 27501 27502 o Code simplifications and refactoring: 27503 - Remove some dead code as indicated by coverity. 27504 - Remove a few dead assignments during router parsing. Found by 27505 coverity. 27506 - Add some forgotten return value checks during unit tests. Found 27507 by coverity. 27508 - Don't use 1-bit wide signed bit fields. Found by coverity. 27509 27510 27511Changes in version 0.2.2.28-beta - 2011-06-04 27512 Tor 0.2.2.28-beta makes great progress towards a new stable release: we 27513 fixed a big bug in whether relays stay in the consensus consistently, 27514 we moved closer to handling bridges and hidden services correctly, 27515 and we started the process of better handling the dreaded "my Vidalia 27516 died, and now my Tor demands a password when I try to reconnect to it" 27517 usability issue. 27518 27519 o Major bugfixes: 27520 - Don't decide to make a new descriptor when receiving a HUP signal. 27521 This bug has caused a lot of 0.2.2.x relays to disappear from the 27522 consensus periodically. Fixes the most common case of triggering 27523 bug 1810; bugfix on 0.2.2.7-alpha. 27524 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574. 27525 - Don't try to build descriptors if "ORPort auto" is set and we 27526 don't know our actual ORPort yet. Fix for bug 3216; bugfix on 27527 0.2.2.26-beta. 27528 - Resolve a crash that occurred when setting BridgeRelay to 1 with 27529 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha. 27530 - Apply circuit timeouts to opened hidden-service-related circuits 27531 based on the correct start time. Previously, we would apply the 27532 circuit build timeout based on time since the circuit's creation; 27533 it was supposed to be applied based on time since the circuit 27534 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297. 27535 - Use the same circuit timeout for client-side introduction 27536 circuits as for other four-hop circuits, rather than the timeout 27537 for single-hop directory-fetch circuits; the shorter timeout may 27538 have been appropriate with the static circuit build timeout in 27539 0.2.1.x and earlier, but caused many hidden service access attempts 27540 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix 27541 on 0.2.2.2-alpha; fixes another part of bug 1297. 27542 - In ticket 2511 we fixed a case where you could use an unconfigured 27543 bridge if you had configured it as a bridge the last time you ran 27544 Tor. Now fix another edge case: if you had configured it as a bridge 27545 but then switched to a different bridge via the controller, you 27546 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha; 27547 fixes bug 3321. 27548 27549 o Major features: 27550 - Add an __OwningControllerProcess configuration option and a 27551 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure 27552 that when it exits, Tor will shut down. Implements feature 3049. 27553 - If "UseBridges 1" is set and no bridges are configured, Tor will 27554 now refuse to build any circuits until some bridges are set. 27555 If "UseBridges auto" is set, Tor will use bridges if they are 27556 configured and we are not running as a server, but otherwise will 27557 make circuits as usual. The new default is "auto". Patch by anonym, 27558 so the Tails LiveCD can stop automatically revealing you as a Tor 27559 user on startup. 27560 27561 o Minor bugfixes: 27562 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option. 27563 - Remove a trailing asterisk from "exit-policy/default" in the 27564 output of the control port command "GETINFO info/names". Bugfix 27565 on 0.1.2.5-alpha. 27566 - Use a wide type to hold sockets when built for 64-bit Windows builds. 27567 Fixes bug 3270. 27568 - Warn when the user configures two HiddenServiceDir lines that point 27569 to the same directory. Bugfix on 0.0.6 (the version introducing 27570 HiddenServiceDir); fixes bug 3289. 27571 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes 27572 part of bug 2748; bugfix on 0.2.0.10-alpha. 27573 - Log malformed requests for rendezvous descriptors as protocol 27574 warnings, not warnings. Also, use a more informative log message 27575 in case someone sees it at log level warning without prior 27576 info-level messages. Fixes the other part of bug 2748; bugfix 27577 on 0.2.0.10-alpha. 27578 - Clear the table recording the time of the last request for each 27579 hidden service descriptor from each HS directory on SIGNAL NEWNYM. 27580 Previously, we would clear our HS descriptor cache on SIGNAL 27581 NEWNYM, but if we had previously retrieved a descriptor (or tried 27582 to) from every directory responsible for it, we would refuse to 27583 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha; 27584 fixes bug 3309. 27585 - Fix a log message that said "bits" while displaying a value in 27586 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on 27587 0.2.0.1-alpha. 27588 - When checking for 1024-bit keys, check for 1024 bits, not 128 27589 bytes. This allows Tor to correctly discard keys of length 1017 27590 through 1023. Bugfix on 0.0.9pre5. 27591 27592 o Minor features: 27593 - Relays now log the reason for publishing a new relay descriptor, 27594 so we have a better chance of hunting down instances of bug 1810. 27595 Resolves ticket 3252. 27596 - Revise most log messages that refer to nodes by nickname to 27597 instead use the "$key=nickname at address" format. This should be 27598 more useful, especially since nicknames are less and less likely 27599 to be unique. Resolves ticket 3045. 27600 - Log (at info level) when purging pieces of hidden-service-client 27601 state because of SIGNAL NEWNYM. 27602 27603 o Removed options: 27604 - Remove undocumented option "-F" from tor-resolve: it hasn't done 27605 anything since 0.2.1.16-rc. 27606 27607 27608Changes in version 0.2.2.27-beta - 2011-05-18 27609 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous 27610 release, and also adds a few more general bugfixes. 27611 27612 o Major bugfixes: 27613 - Fix a crash bug when changing bridges in a running Tor process. 27614 Fixes bug 3213; bugfix on 0.2.2.26-beta. 27615 - When the controller configures a new bridge, don't wait 10 to 60 27616 seconds before trying to fetch its descriptor. Bugfix on 27617 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355). 27618 27619 o Minor bugfixes: 27620 - Require that onion keys have exponent 65537 in microdescriptors too. 27621 Fixes more of bug 3207; bugfix on 0.2.2.26-beta. 27622 - Tor used to limit HttpProxyAuthenticator values to 48 characters. 27623 Changed the limit to 512 characters by removing base64 newlines. 27624 Fixes bug 2752. Fix by Michael Yakubovich. 27625 - When a client starts or stops using bridges, never use a circuit 27626 that was built before the configuration change. This behavior could 27627 put at risk a user who uses bridges to ensure that her traffic 27628 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes 27629 bug 3200. 27630 27631 27632Changes in version 0.2.2.26-beta - 2011-05-17 27633 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It 27634 also introduces a new "socksport auto" approach that should make it 27635 easier to run multiple Tors on the same system, and does a lot of 27636 cleanup to get us closer to a release candidate. 27637 27638 o Security/privacy fixes: 27639 - Replace all potentially sensitive memory comparison operations 27640 with versions whose runtime does not depend on the data being 27641 compared. This will help resist a class of attacks where an 27642 adversary can use variations in timing information to learn 27643 sensitive data. Fix for one case of bug 3122. (Safe memcmp 27644 implementation by Robert Ransom based partially on code by DJB.) 27645 - When receiving a hidden service descriptor, check that it is for 27646 the hidden service we wanted. Previously, Tor would store any 27647 hidden service descriptors that a directory gave it, whether it 27648 wanted them or not. This wouldn't have let an attacker impersonate 27649 a hidden service, but it did let directories pre-seed a client 27650 with descriptors that it didn't want. Bugfix on 0.0.6. 27651 - On SIGHUP, do not clear out all TrackHostExits mappings, client 27652 DNS cache entries, and virtual address mappings: that's what 27653 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc. 27654 27655 o Major features: 27656 - The options SocksPort, ControlPort, and so on now all accept a 27657 value "auto" that opens a socket on an OS-selected port. A 27658 new ControlPortWriteToFile option tells Tor to write its 27659 actual control port or ports to a chosen file. If the option 27660 ControlPortFileGroupReadable is set, the file is created as 27661 group-readable. Now users can run two Tor clients on the same 27662 system without needing to manually mess with parameters. Resolves 27663 part of ticket 3076. 27664 - Set SO_REUSEADDR on all sockets, not just listeners. This should 27665 help busy exit nodes avoid running out of useable ports just 27666 because all the ports have been used in the near past. Resolves 27667 issue 2850. 27668 27669 o Minor features: 27670 - New "GETINFO net/listeners/(type)" controller command to return 27671 a list of addresses and ports that are bound for listeners for a 27672 given connection type. This is useful when the user has configured 27673 "SocksPort auto" and the controller needs to know which port got 27674 chosen. Resolves another part of ticket 3076. 27675 - Add a new ControlSocketsGroupWritable configuration option: when 27676 it is turned on, ControlSockets are group-writeable by the default 27677 group of the current user. Patch by Jérémy Bobbio; implements 27678 ticket 2972. 27679 - Tor now refuses to create a ControlSocket in a directory that is 27680 world-readable (or group-readable if ControlSocketsGroupWritable 27681 is 0). This is necessary because some operating systems do not 27682 enforce permissions on an AF_UNIX sockets. Permissions on the 27683 directory holding the socket, however, seems to work everywhere. 27684 - Rate-limit a warning about failures to download v2 networkstatus 27685 documents. Resolves part of bug 1352. 27686 - Backport code from 0.2.3.x that allows directory authorities to 27687 clean their microdescriptor caches. Needed to resolve bug 2230. 27688 - When an HTTPS proxy reports "403 Forbidden", we now explain 27689 what it means rather than calling it an unexpected status code. 27690 Closes bug 2503. Patch from Michael Yakubovich. 27691 - Update to the May 1 2011 Maxmind GeoLite Country database. 27692 27693 o Minor bugfixes: 27694 - Authorities now clean their microdesc cache periodically and when 27695 reading from disk initially, not only when adding new descriptors. 27696 This prevents a bug where we could lose microdescriptors. Bugfix 27697 on 0.2.2.6-alpha. Fixes bug 2230. 27698 - Do not crash when our configuration file becomes unreadable, for 27699 example due to a permissions change, between when we start up 27700 and when a controller calls SAVECONF. Fixes bug 3135; bugfix 27701 on 0.0.9pre6. 27702 - Avoid a bug that would keep us from replacing a microdescriptor 27703 cache on Windows. (We would try to replace the file while still 27704 holding it open. That's fine on Unix, but Windows doesn't let us 27705 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet. 27706 - Add missing explanations for the authority-related torrc options 27707 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the 27708 man page. Resolves issue 2379. 27709 - As an authority, do not upload our own vote or signature set to 27710 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha, 27711 it would get flagged as a duplicate. Resolves bug 3026. 27712 - Accept hidden service descriptors if we think we might be a hidden 27713 service directory, regardless of what our consensus says. This 27714 helps robustness, since clients and hidden services can sometimes 27715 have a more up-to-date view of the network consensus than we do, 27716 and if they think that the directory authorities list us a HSDir, 27717 we might actually be one. Related to bug 2732; bugfix on 27718 0.2.0.10-alpha. 27719 - When a controller changes TrackHostExits, remove mappings for 27720 hosts that should no longer have their exits tracked. Bugfix on 27721 0.1.0.1-rc. 27722 - When a controller changes VirtualAddrNetwork, remove any mappings 27723 for hosts that were automapped to the old network. Bugfix on 27724 0.1.1.19-rc. 27725 - When a controller changes one of the AutomapHosts* options, remove 27726 any mappings for hosts that should no longer be automapped. Bugfix 27727 on 0.2.0.1-alpha. 27728 - Do not reset the bridge descriptor download status every time we 27729 re-parse our configuration or get a configuration change. Fixes 27730 bug 3019; bugfix on 0.2.0.3-alpha. 27731 27732 o Minor bugfixes (code cleanup): 27733 - When loading the microdesc journal, remember its current size. 27734 In 0.2.2, this helps prevent the microdesc journal from growing 27735 without limit on authorities (who are the only ones to use it in 27736 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha. 27737 Fix posted by "cypherpunks." 27738 - The microdesc journal is supposed to get rebuilt only if it is 27739 at least _half_ the length of the store, not _twice_ the length 27740 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230. 27741 - Fix a potential null-pointer dereference while computing a 27742 consensus. Bugfix on 0.2.0.3-alpha, found with the help of 27743 clang's analyzer. 27744 - Avoid a possible null-pointer dereference when rebuilding the mdesc 27745 cache without actually having any descriptors to cache. Bugfix on 27746 0.2.2.6-alpha. Issue discovered using clang's static analyzer. 27747 - If we fail to compute the identity digest of a v3 legacy keypair, 27748 warn, and don't use a buffer-full of junk instead. Bugfix on 27749 0.2.1.1-alpha; fixes bug 3106. 27750 - Resolve an untriggerable issue in smartlist_string_num_isin(), 27751 where if the function had ever in the future been used to check 27752 for the presence of a too-large number, it would have given an 27753 incorrect result. (Fortunately, we only used it for 16-bit 27754 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc. 27755 - Require that introduction point keys and onion handshake keys 27756 have a public exponent of 65537. Starts to fix bug 3207; bugfix 27757 on 0.2.0.10-alpha. 27758 27759 o Removed features: 27760 - Caches no longer download and serve v2 networkstatus documents 27761 unless FetchV2Networkstatus flag is set: these documents haven't 27762 haven't been used by clients or relays since 0.2.0.x. Resolves 27763 bug 3022. 27764 27765 27766Changes in version 0.2.3.1-alpha - 2011-05-05 27767 Tor 0.2.3.1-alpha adds some new experimental features, including support 27768 for an improved network IO backend, IOCP networking on Windows, 27769 microdescriptor caching, "fast-start" support for streams, and automatic 27770 home router configuration. There are also numerous internal improvements 27771 to try to make the code easier for developers to work with. 27772 27773 This is the first alpha release in a new series, so expect there to be 27774 bugs. Users who would rather test out a more stable branch should 27775 stay with 0.2.2.x for now. 27776 27777 o Major features: 27778 - Tor can now optionally build with the "bufferevents" buffered IO 27779 backend provided by Libevent 2. To use this feature, make sure you 27780 have the latest possible version of Libevent, and pass the 27781 --enable-bufferevents flag to configure when building Tor from 27782 source. This feature will make our networking code more flexible, 27783 let us stack layers on each other, and let us use more efficient 27784 zero-copy transports where available. 27785 - As an experimental feature, Tor can use IOCP for networking on Windows. 27786 Once this code is tuned and optimized, it promises much better 27787 performance than the select-based backend we've used in the past. To 27788 try this feature, you must build Tor with Libevent 2, configure Tor 27789 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to 27790 your torrc. There are known bugs here: only try this if you can help 27791 debug it as it breaks. 27792 - The EntryNodes option can now include country codes like {de} or IP 27793 addresses or network masks. Previously we had disallowed these options 27794 because we didn't have an efficient way to keep the list up to 27795 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here. 27796 - Exit nodes now accept and queue data on not-yet-connected streams. 27797 Previously, the client wasn't allowed to send data until the stream was 27798 connected, which slowed down all connections. This change will enable 27799 clients to perform a "fast-start" on streams and send data without 27800 having to wait for a confirmation that the stream has opened. (Patch 27801 from Ian Goldberg; implements the server side of Proposal 174.) 27802 - Tor now has initial support for automatic port mapping on the many 27803 home routers that support NAT-PMP or UPnP. (Not yet supported on 27804 Windows). To build the support code, you'll need to have libnatpnp 27805 library and/or the libminiupnpc library, and you'll need to enable the 27806 feature specifically by passing "--enable-upnp" and/or 27807 "--enable-natpnp" to configure. To turn it on, use the new 27808 PortForwarding option. 27809 - Caches now download, cache, and serve multiple "flavors" of the 27810 consensus, including a flavor that describes microdescriptors. 27811 - Caches now download, cache, and serve microdescriptors -- small 27812 summaries of router descriptors that are authenticated by all of the 27813 directory authorities. Once enough caches are running this code, 27814 clients will be able to save significant amounts of directory bandwidth 27815 by downloading microdescriptors instead of router descriptors. 27816 27817 o Minor features: 27818 - Make logging resolution configurable with a new LogTimeGranularity 27819 option, and change the default from 1 millisecond to 1 second. 27820 Implements enhancement 1668. 27821 - We log which torrc file we're using on startup. Implements ticket 27822 2444. 27823 - Ordinarily, Tor does not count traffic from private addresses (like 27824 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting. 27825 There is now a new option, CountPrivateBandwidth, to disable this 27826 behavior. Patch from Daniel Cagara. 27827 - New --enable-static-tor configure option for building Tor as 27828 statically as possible. Idea, general hackery and thoughts from 27829 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket 27830 2702. 27831 - If you set the NumCPUs option to 0, Tor will now try to detect how 27832 many CPUs you have. This is the new default behavior. 27833 - Turn on directory request statistics by default and include them in 27834 extra-info descriptors. Don't break if we have no GeoIP database. 27835 - Relays that set "ConnDirectionStatistics 1" write statistics on the 27836 bidirectional use of connections to disk every 24 hours. 27837 - Add a GeoIP file digest to the extra-info descriptor. Implements 27838 enhancement 1883. 27839 - The NodeFamily option -- which let you declare that you want to 27840 consider nodes to be part of a family whether they list themselves 27841 that way or not -- now allows IP address ranges and country codes. 27842 - Add a new 'Heartbeat' log message type to periodically log a message 27843 describing Tor's status at level Notice. This feature is meant for 27844 operators who log at notice, and want to make sure that their Tor 27845 server is still working. Implementation by George Kadianakis. 27846 27847 o Minor bugfixes (on 0.2.2.25-alpha): 27848 - When loading the microdesc journal, remember its current size. 27849 In 0.2.2, this helps prevent the microdesc journal from growing 27850 without limit on authorities (who are the only ones to use it in 27851 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha. 27852 Fix posted by "cypherpunks." 27853 - The microdesc journal is supposed to get rebuilt only if it is 27854 at least _half_ the length of the store, not _twice_ the length 27855 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230. 27856 - If as an authority we fail to compute the identity digest of a v3 27857 legacy keypair, warn, and don't use a buffer-full of junk instead. 27858 Bugfix on 0.2.1.1-alpha; fixes bug 3106. 27859 - Authorities now clean their microdesc cache periodically and when 27860 reading from disk initially, not only when adding new descriptors. 27861 This prevents a bug where we could lose microdescriptors. Bugfix 27862 on 0.2.2.6-alpha. 27863 27864 o Minor features (controller): 27865 - Add a new SIGNAL event to the controller interface so that 27866 controllers can be notified when Tor handles a signal. Resolves 27867 issue 1955. Patch by John Brooks. 27868 - Add a new GETINFO option to get total bytes read and written. Patch 27869 from pipe, revised by atagar. Resolves ticket 2345. 27870 - Implement some GETINFO controller fields to provide information about 27871 the Tor process's pid, euid, username, and resource limits. 27872 27873 o Build changes: 27874 - Our build system requires automake 1.6 or later to create the 27875 Makefile.in files. Previously, you could have used 1.4. 27876 This only affects developers and people building Tor from git; 27877 people who build Tor from the source distribution without changing 27878 the Makefile.am files should be fine. 27879 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and 27880 so on. This is more robust against some of the failure modes 27881 associated with running the autotools pieces on their own. 27882 27883 o Minor packaging issues: 27884 - On OpenSUSE, create the /var/run/tor directory on startup if it is not 27885 already created. Patch from Andreas Stieger. Fixes bug 2573. 27886 27887 o Code simplifications and refactoring: 27888 - A major revision to our internal node-selecting and listing logic. 27889 Tor already had at least two major ways to look at the question of 27890 "which Tor servers do we know about": a list of router descriptors, 27891 and a list of entries in the current consensus. With 27892 microdescriptors, we're adding a third. Having so many systems 27893 without an abstraction layer over them was hurting the codebase. 27894 Now, we have a new "node_t" abstraction that presents a consistent 27895 interface to a client's view of a Tor node, and holds (nearly) all 27896 of the mutable state formerly in routerinfo_t and routerstatus_t. 27897 - The helper programs tor-gencert, tor-resolve, and tor-checkkey 27898 no longer link against Libevent: they never used it, but 27899 our library structure used to force them to link it. 27900 27901 o Removed features: 27902 - Remove some old code to work around even older versions of Tor that 27903 used forked processes to handle DNS requests. Such versions of Tor 27904 are no longer in use as servers. 27905 27906 o Documentation fixes: 27907 - Correct a broken faq link in the INSTALL file. Fixes bug 2307. 27908 - Add missing documentation for the authority-related torrc options 27909 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves 27910 issue 2379. 27911 27912 27913Changes in version 0.2.2.25-alpha - 2011-04-29 27914 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more 27915 robust, routers no longer overreport their bandwidth, Win7 should crash 27916 a little less, and NEWNYM (as used by Vidalia's "new identity" button) 27917 now prevents hidden service-related activity from being linkable. It 27918 provides more information to Vidalia so you can see if your bridge is 27919 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and 27920 StrictNodes configuration options to make them more reliable, more 27921 understandable, and more regularly applied. If you use those options, 27922 please see the revised documentation for them in the manual page. 27923 27924 o Major bugfixes: 27925 - Relays were publishing grossly inflated bandwidth values because 27926 they were writing their state files wrong--now they write the 27927 correct value. Also, resume reading bandwidth history from the 27928 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha. 27929 - Improve hidden service robustness: When we find that we have 27930 extended a hidden service's introduction circuit to a relay not 27931 listed as an introduction point in the HS descriptor we currently 27932 have, retry with an introduction point from the current 27933 descriptor. Previously we would just give up. Fixes bugs 1024 and 27934 1930; bugfix on 0.2.0.10-alpha. 27935 - Clients now stop trying to use an exit node associated with a given 27936 destination by TrackHostExits if they fail to reach that exit node. 27937 Fixes bug 2999. Bugfix on 0.2.0.20-rc. 27938 - Fix crash bug on platforms where gmtime and localtime can return 27939 NULL. Windows 7 users were running into this one. Fixes part of bug 27940 2077. Bugfix on all versions of Tor. Found by boboper. 27941 27942 o Security and stability fixes: 27943 - Don't double-free a parsable, but invalid, microdescriptor, even if 27944 it is followed in the blob we're parsing by an unparsable 27945 microdescriptor. Fixes an issue reported in a comment on bug 2954. 27946 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks". 27947 - If the Nickname configuration option isn't given, Tor would pick a 27948 nickname based on the local hostname as the nickname for a relay. 27949 Because nicknames are not very important in today's Tor and the 27950 "Unnamed" nickname has been implemented, this is now problematic 27951 behavior: It leaks information about the hostname without being 27952 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which 27953 introduced the Unnamed nickname. Reported by tagnaq. 27954 - Fix an uncommon assertion failure when running with DNSPort under 27955 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha. 27956 - Avoid linkability based on cached hidden service descriptors: forget 27957 all hidden service descriptors cached as a client when processing a 27958 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6. 27959 27960 o Major features: 27961 - Export GeoIP information on bridge usage to controllers even if we 27962 have not yet been running for 24 hours. Now Vidalia bridge operators 27963 can get more accurate and immediate feedback about their 27964 contributions to the network. 27965 27966 o Major features and bugfixes (node selection): 27967 - Revise and reconcile the meaning of the ExitNodes, EntryNodes, 27968 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes 27969 options. Previously, we had been ambiguous in describing what 27970 counted as an "exit" node, and what operations exactly "StrictNodes 27971 0" would permit. This created confusion when people saw nodes built 27972 through unexpected circuits, and made it hard to tell real bugs from 27973 surprises. Now the intended behavior is: 27974 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means 27975 a node that delivers user traffic outside the Tor network. 27976 . "Entry", in the context of EntryNodes, means a node used as the 27977 first hop of a multihop circuit. It doesn't include direct 27978 connections to directory servers. 27979 . "ExcludeNodes" applies to all nodes. 27980 . "StrictNodes" changes the behavior of ExcludeNodes only. When 27981 StrictNodes is set, Tor should avoid all nodes listed in 27982 ExcludeNodes, even when it will make user requests fail. When 27983 StrictNodes is *not* set, then Tor should follow ExcludeNodes 27984 whenever it can, except when it must use an excluded node to 27985 perform self-tests, connect to a hidden service, provide a 27986 hidden service, fulfill a .exit request, upload directory 27987 information, or fetch directory information. 27988 Collectively, the changes to implement the behavior fix bug 1090. 27989 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if 27990 a node is listed in both, it's treated as excluded. 27991 - ExcludeNodes now applies to directory nodes -- as a preference if 27992 StrictNodes is 0, or an absolute requirement if StrictNodes is 1. 27993 Don't exclude all the directory authorities and set StrictNodes to 1 27994 unless you really want your Tor to break. 27995 - ExcludeNodes and ExcludeExitNodes now override exit enclaving. 27996 - ExcludeExitNodes now overrides .exit requests. 27997 - We don't use bridges listed in ExcludeNodes. 27998 - When StrictNodes is 1: 27999 . We now apply ExcludeNodes to hidden service introduction points 28000 and to rendezvous points selected by hidden service users. This 28001 can make your hidden service less reliable: use it with caution! 28002 . If we have used ExcludeNodes on ourself, do not try relay 28003 reachability self-tests. 28004 . If we have excluded all the directory authorities, we will not 28005 even try to upload our descriptor if we're a relay. 28006 . Do not honor .exit requests to an excluded node. 28007 - Remove a misfeature that caused us to ignore the Fast/Stable flags 28008 when ExitNodes is set. Bugfix on 0.2.2.7-alpha. 28009 - When the set of permitted nodes changes, we now remove any mappings 28010 introduced via TrackExitHosts to now-excluded nodes. Bugfix on 28011 0.1.0.1-rc. 28012 - We never cannibalize a circuit that had excluded nodes on it, even 28013 if StrictNodes is 0. Bugfix on 0.1.0.1-rc. 28014 - Revert a change where we would be laxer about attaching streams to 28015 circuits than when building the circuits. This was meant to prevent 28016 a set of bugs where streams were never attachable, but our improved 28017 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha. 28018 - Keep track of how many times we launch a new circuit to handle a 28019 given stream. Too many launches could indicate an inconsistency 28020 between our "launch a circuit to handle this stream" logic and our 28021 "attach this stream to one of the available circuits" logic. 28022 - Improve log messages related to excluded nodes. 28023 28024 o Minor bugfixes: 28025 - Fix a spurious warning when moving from a short month to a long 28026 month on relays with month-based BandwidthAccounting. Bugfix on 28027 0.2.2.17-alpha; fixes bug 3020. 28028 - When a client finds that an origin circuit has run out of 16-bit 28029 stream IDs, we now mark it as unusable for new streams. Previously, 28030 we would try to close the entire circuit. Bugfix on 0.0.6. 28031 - Add a forgotten cast that caused a compile warning on OS X 10.6. 28032 Bugfix on 0.2.2.24-alpha. 28033 - Be more careful about reporting the correct error from a failed 28034 connect() system call. Under some circumstances, it was possible to 28035 look at an incorrect value for errno when sending the end reason. 28036 Bugfix on 0.1.0.1-rc. 28037 - Correctly handle an "impossible" overflow cases in connection byte 28038 counting, where we write or read more than 4GB on an edge connection 28039 in a single second. Bugfix on 0.1.2.8-beta. 28040 - Correct the warning displayed when a rendezvous descriptor exceeds 28041 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by 28042 John Brooks. 28043 - Clients and hidden services now use HSDir-flagged relays for hidden 28044 service descriptor downloads and uploads even if the relays have no 28045 DirPort set and the client has disabled TunnelDirConns. This will 28046 eventually allow us to give the HSDir flag to relays with no 28047 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha. 28048 - Downgrade "no current certificates known for authority" message from 28049 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha. 28050 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug 28051 2917. Bugfix on 0.1.1.1-alpha. 28052 - Only limit the lengths of single HS descriptors, even when multiple 28053 HS descriptors are published to an HSDir relay in a single POST 28054 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir. 28055 - Write the current time into the LastWritten line in our state file, 28056 rather than the time from the previous write attempt. Also, stop 28057 trying to use a time of -1 in our log statements. Fixes bug 3039; 28058 bugfix on 0.2.2.14-alpha. 28059 - Be more consistent in our treatment of file system paths. "~" should 28060 get expanded to the user's home directory in the Log config option. 28061 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the 28062 feature for the -f and --DataDirectory options. 28063 28064 o Minor features: 28065 - Make sure every relay writes a state file at least every 12 hours. 28066 Previously, a relay could go for weeks without writing its state 28067 file, and on a crash could lose its bandwidth history, capacity 28068 estimates, client country statistics, and so on. Addresses bug 3012. 28069 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors. 28070 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such 28071 clients are already deprecated because of security bugs. 28072 - Don't allow v0 hidden service authorities to act as clients. 28073 Required by fix for bug 3000. 28074 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required 28075 by fix for bug 3000. 28076 - Ensure that no empty [dirreq-](read|write)-history lines are added 28077 to an extrainfo document. Implements ticket 2497. 28078 28079 o Code simplification and refactoring: 28080 - Remove workaround code to handle directory responses from servers 28081 that had bug 539 (they would send HTTP status 503 responses _and_ 28082 send a body too). Since only server versions before 28083 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to 28084 keep the workaround in place. 28085 - Remove the old 'fuzzy time' logic. It was supposed to be used for 28086 handling calculations where we have a known amount of clock skew and 28087 an allowed amount of unknown skew. But we only used it in three 28088 places, and we never adjusted the known/unknown skew values. This is 28089 still something we might want to do someday, but if we do, we'll 28090 want to do it differently. 28091 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned. 28092 None of the cases where we did this before were wrong, but by making 28093 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28. 28094 - Use GetTempDir to find the proper temporary directory location on 28095 Windows when generating temporary files for the unit tests. Patch by 28096 Gisle Vanem. 28097 28098 28099Changes in version 0.2.2.24-alpha - 2011-04-08 28100 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that 28101 prevented Tor clients from effectively using "multihomed" bridges, 28102 that is, bridges that listen on multiple ports or IP addresses so users 28103 can continue to use some of their addresses even if others get blocked. 28104 28105 o Major bugfixes: 28106 - Fix a bug where bridge users who configure the non-canonical 28107 address of a bridge automatically switch to its canonical 28108 address. If a bridge listens at more than one address, it should be 28109 able to advertise those addresses independently and any non-blocked 28110 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes 28111 bug 2510. 28112 - If you configured Tor to use bridge A, and then quit and 28113 configured Tor to use bridge B instead, it would happily continue 28114 to use bridge A if it's still reachable. While this behavior is 28115 a feature if your goal is connectivity, in some scenarios it's a 28116 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511. 28117 - Directory authorities now use data collected from their own 28118 uptime observations when choosing whether to assign the HSDir flag 28119 to relays, instead of trusting the uptime value the relay reports in 28120 its descriptor. This change helps prevent an attack where a small 28121 set of nodes with frequently-changing identity keys can blackhole 28122 a hidden service. (Only authorities need upgrade; others will be 28123 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709. 28124 28125 o Minor bugfixes: 28126 - When we restart our relay, we might get a successful connection 28127 from the outside before we've started our reachability tests, 28128 triggering a warning: "ORPort found reachable, but I have no 28129 routerinfo yet. Failing to inform controller of success." This 28130 bug was harmless unless Tor is running under a controller 28131 like Vidalia, in which case the controller would never get a 28132 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha; 28133 fixes bug 1172. 28134 - Make directory authorities more accurate at recording when 28135 relays that have failed several reachability tests became 28136 unreachable, so we can provide more accuracy at assigning Stable, 28137 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716. 28138 - Fix an issue that prevented static linking of libevent on 28139 some platforms (notably Linux). Fixes bug 2698; bugfix on 28140 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing 28141 the --with-static-libevent configure option). 28142 - We now ask the other side of a stream (the client or the exit) 28143 for more data on that stream when the amount of queued data on 28144 that stream dips low enough. Previously, we wouldn't ask the 28145 other side for more data until either it sent us more data (which 28146 it wasn't supposed to do if it had exhausted its window!) or we 28147 had completely flushed all our queued data. This flow control fix 28148 should improve throughput. Fixes bug 2756; bugfix on the earliest 28149 released versions of Tor (svn commit r152). 28150 - Avoid a double-mark-for-free warning when failing to attach a 28151 transparent proxy connection. (We thought we had fixed this in 28152 0.2.2.23-alpha, but it turns out our fix was checking the wrong 28153 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original 28154 bug) and 0.2.2.23-alpha (the incorrect fix). 28155 - When warning about missing zlib development packages during compile, 28156 give the correct package names. Bugfix on 0.2.0.1-alpha. 28157 28158 o Minor features: 28159 - Directory authorities now log the source of a rejected POSTed v3 28160 networkstatus vote. 28161 - Make compilation with clang possible when using 28162 --enable-gcc-warnings by removing two warning options that clang 28163 hasn't implemented yet and by fixing a few warnings. Implements 28164 ticket 2696. 28165 - When expiring circuits, use microsecond timers rather than 28166 one-second timers. This can avoid an unpleasant situation where a 28167 circuit is launched near the end of one second and expired right 28168 near the beginning of the next, and prevent fluctuations in circuit 28169 timeout values. 28170 - Use computed circuit-build timeouts to decide when to launch 28171 parallel introduction circuits for hidden services. (Previously, 28172 we would retry after 15 seconds.) 28173 - Update to the April 1 2011 Maxmind GeoLite Country database. 28174 28175 o Packaging fixes: 28176 - Create the /var/run/tor directory on startup on OpenSUSE if it is 28177 not already created. Patch from Andreas Stieger. Fixes bug 2573. 28178 28179 o Documentation changes: 28180 - Modernize the doxygen configuration file slightly. Fixes bug 2707. 28181 - Resolve all doxygen warnings except those for missing documentation. 28182 Fixes bug 2705. 28183 - Add doxygen documentation for more functions, fields, and types. 28184 28185 28186Changes in version 0.2.2.23-alpha - 2011-03-08 28187 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when 28188 they restart they don't lose their bandwidth capacity estimate. This 28189 release also fixes a diverse set of user-facing bugs, ranging from 28190 relays overrunning their rate limiting to clients falsely warning about 28191 clock skew to bridge descriptor leaks by our bridge directory authority. 28192 28193 o Major bugfixes: 28194 - Stop sending a CLOCK_SKEW controller status event whenever 28195 we fetch directory information from a relay that has a wrong clock. 28196 Instead, only inform the controller when it's a trusted authority 28197 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes 28198 the rest of bug 1074. 28199 - Fix an assert in parsing router descriptors containing IPv6 28200 addresses. This one took down the directory authorities when 28201 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha. 28202 - Make the bridge directory authority refuse to answer directory 28203 requests for "all" descriptors. It used to include bridge 28204 descriptors in its answer, which was a major information leak. 28205 Found by "piebeer". Bugfix on 0.2.0.3-alpha. 28206 - If relays set RelayBandwidthBurst but not RelayBandwidthRate, 28207 Tor would ignore their RelayBandwidthBurst setting, 28208 potentially using more bandwidth than expected. Bugfix on 28209 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470. 28210 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor 28211 hidserv" in her torrc. The 'hidserv' argument never controlled 28212 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha. 28213 28214 o Major features: 28215 - Relays now save observed peak bandwidth throughput rates to their 28216 state file (along with total usage, which was already saved) 28217 so that they can determine their correct estimated bandwidth on 28218 restart. Resolves bug 1863, where Tor relays would reset their 28219 estimated bandwidth to 0 after restarting. 28220 - Directory authorities now take changes in router IP address and 28221 ORPort into account when determining router stability. Previously, 28222 if a router changed its IP or ORPort, the authorities would not 28223 treat it as having any downtime for the purposes of stability 28224 calculation, whereas clients would experience downtime since the 28225 change could take a while to propagate to them. Resolves issue 1035. 28226 - Enable Address Space Layout Randomization (ASLR) and Data Execution 28227 Prevention (DEP) by default on Windows to make it harder for 28228 attackers to exploit vulnerabilities. Patch from John Brooks. 28229 28230 o Minor bugfixes (on 0.2.1.x and earlier): 28231 - Fix a rare crash bug that could occur when a client was configured 28232 with a large number of bridges. Fixes bug 2629; bugfix on 28233 0.2.1.2-alpha. Bugfix by trac user "shitlei". 28234 - Avoid a double mark-for-free warning when failing to attach a 28235 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes 28236 bug 2279. 28237 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378; 28238 found by "cypherpunks". This bug was introduced before the first 28239 Tor release, in svn commit r110. 28240 - Country codes aren't supported in EntryNodes until 0.2.3.x, so 28241 don't mention them in the manpage. Fixes bug 2450; issue 28242 spotted by keb and G-Lo. 28243 - Fix a bug in bandwidth history state parsing that could have been 28244 triggered if a future version of Tor ever changed the timing 28245 granularity at which bandwidth history is measured. Bugfix on 28246 Tor 0.1.1.11-alpha. 28247 - When a relay decides that its DNS is too broken for it to serve 28248 as an exit server, it advertised itself as a non-exit, but 28249 continued to act as an exit. This could create accidental 28250 partitioning opportunities for users. Instead, if a relay is 28251 going to advertise reject *:* as its exit policy, it should 28252 really act with exit policy "reject *:*". Fixes bug 2366. 28253 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac. 28254 - In the special case where you configure a public exit relay as your 28255 bridge, Tor would be willing to use that exit relay as the last 28256 hop in your circuit as well. Now we fail that circuit instead. 28257 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer". 28258 - Fix a bug with our locking implementation on Windows that couldn't 28259 correctly detect when a file was already locked. Fixes bug 2504, 28260 bugfix on 0.2.1.6-alpha. 28261 - Fix IPv6-related connect() failures on some platforms (BSD, OS X). 28262 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by 28263 "piebeer". 28264 - Set target port in get_interface_address6() correctly. Bugfix 28265 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660. 28266 - Directory authorities are now more robust to hops back in time 28267 when calculating router stability. Previously, if a run of uptime 28268 or downtime appeared to be negative, the calculation could give 28269 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing 28270 bug 1035. 28271 - Fix an assert that got triggered when using the TestingTorNetwork 28272 configuration option and then issuing a GETINFO config-text control 28273 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha. 28274 28275 o Minor bugfixes (on 0.2.2.x): 28276 - Clients should not weight BadExit nodes as Exits in their node 28277 selection. Similarly, directory authorities should not count BadExit 28278 bandwidth as Exit bandwidth when computing bandwidth-weights. 28279 Bugfix on 0.2.2.10-alpha; fixes bug 2203. 28280 - Correctly clear our dir_read/dir_write history when there is an 28281 error parsing any bw history value from the state file. Bugfix on 28282 Tor 0.2.2.15-alpha. 28283 - Resolve a bug in verifying signatures of directory objects 28284 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha. 28285 Fixes bug 2409. Found by "piebeer". 28286 - Bridge authorities no longer crash on SIGHUP when they try to 28287 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix 28288 on 0.2.2.22-alpha. 28289 28290 o Minor features: 28291 - Log less aggressively about circuit timeout changes, and improve 28292 some other circuit timeout messages. Resolves bug 2004. 28293 - Log a little more clearly about the times at which we're no longer 28294 accepting new connections. Resolves bug 2181. 28295 - Reject attempts at the client side to open connections to private 28296 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with 28297 a randomly chosen exit node. Attempts to do so are always 28298 ill-defined, generally prevented by exit policies, and usually 28299 in error. This will also help to detect loops in transparent 28300 proxy configurations. You can disable this feature by setting 28301 "ClientRejectInternalAddresses 0" in your torrc. 28302 - Always treat failure to allocate an RSA key as an unrecoverable 28303 allocation error. 28304 - Update to the March 1 2011 Maxmind GeoLite Country database. 28305 28306 o Minor features (log subsystem): 28307 - Add documentation for configuring logging at different severities in 28308 different log domains. We've had this feature since 0.2.1.1-alpha, 28309 but for some reason it never made it into the manpage. Fixes 28310 bug 2215. 28311 - Make it simpler to specify "All log domains except for A and B". 28312 Previously you needed to say "[*,~A,~B]". Now you can just say 28313 "[~A,~B]". 28314 - Add a "LogMessageDomains 1" option to include the domains of log 28315 messages along with the messages. Without this, there's no way 28316 to use log domains without reading the source or doing a lot 28317 of guessing. 28318 28319 o Packaging changes: 28320 - Stop shipping the Tor specs files and development proposal documents 28321 in the tarball. They are now in a separate git repository at 28322 git://git.torproject.org/torspec.git 28323 28324 28325Changes in version 0.2.1.30 - 2011-02-23 28326 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other 28327 change is a slight tweak to Tor's TLS handshake that makes relays 28328 and bridges that run this new version reachable from Iran again. 28329 We don't expect this tweak will win the arms race long-term, but it 28330 buys us time until we roll out a better solution. 28331 28332 o Major bugfixes: 28333 - Stop sending a CLOCK_SKEW controller status event whenever 28334 we fetch directory information from a relay that has a wrong clock. 28335 Instead, only inform the controller when it's a trusted authority 28336 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes 28337 the rest of bug 1074. 28338 - Fix a bounds-checking error that could allow an attacker to 28339 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha. 28340 Found by "piebeer". 28341 - If relays set RelayBandwidthBurst but not RelayBandwidthRate, 28342 Tor would ignore their RelayBandwidthBurst setting, 28343 potentially using more bandwidth than expected. Bugfix on 28344 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470. 28345 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor 28346 hidserv" in her torrc. The 'hidserv' argument never controlled 28347 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha. 28348 28349 o Minor features: 28350 - Adjust our TLS Diffie-Hellman parameters to match those used by 28351 Apache's mod_ssl. 28352 - Update to the February 1 2011 Maxmind GeoLite Country database. 28353 28354 o Minor bugfixes: 28355 - Check for and reject overly long directory certificates and 28356 directory tokens before they have a chance to hit any assertions. 28357 Bugfix on 0.2.1.28. Found by "doorss". 28358 - Bring the logic that gathers routerinfos and assesses the 28359 acceptability of circuits into line. This prevents a Tor OP from 28360 getting locked in a cycle of choosing its local OR as an exit for a 28361 path (due to a .exit request) and then rejecting the circuit because 28362 its OR is not listed yet. It also prevents Tor clients from using an 28363 OR running in the same instance as an exit (due to a .exit request) 28364 if the OR does not meet the same requirements expected of an OR 28365 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc. 28366 28367 o Packaging changes: 28368 - Stop shipping the Tor specs files and development proposal documents 28369 in the tarball. They are now in a separate git repository at 28370 git://git.torproject.org/torspec.git 28371 - Do not include Git version tags as though they are SVN tags when 28372 generating a tarball from inside a repository that has switched 28373 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402. 28374 28375 28376Changes in version 0.2.2.22-alpha - 2011-01-25 28377 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The 28378 main other change is a slight tweak to Tor's TLS handshake that makes 28379 relays and bridges that run this new version reachable from Iran again. 28380 We don't expect this tweak will win the arms race long-term, but it 28381 will buy us a bit more time until we roll out a better solution. 28382 28383 o Major bugfixes: 28384 - Fix a bounds-checking error that could allow an attacker to 28385 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha. 28386 Found by "piebeer". 28387 - Don't assert when changing from bridge to relay or vice versa 28388 via the controller. The assert happened because we didn't properly 28389 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes 28390 bug 2433. Reported by bastik. 28391 28392 o Minor features: 28393 - Adjust our TLS Diffie-Hellman parameters to match those used by 28394 Apache's mod_ssl. 28395 - Provide a log message stating which geoip file we're parsing 28396 instead of just stating that we're parsing the geoip file. 28397 Implements ticket 2432. 28398 28399 o Minor bugfixes: 28400 - Check for and reject overly long directory certificates and 28401 directory tokens before they have a chance to hit any assertions. 28402 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss". 28403 28404 28405Changes in version 0.2.2.21-alpha - 2011-01-15 28406 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which 28407 continues our recent code security audit work. The main fix resolves 28408 a remote heap overflow vulnerability that can allow remote code 28409 execution (CVE-2011-0427). Other fixes address a variety of assert 28410 and crash bugs, most of which we think are hard to exploit remotely. 28411 28412 o Major bugfixes (security), also included in 0.2.1.29: 28413 - Fix a heap overflow bug where an adversary could cause heap 28414 corruption. This bug probably allows remote code execution 28415 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on 28416 0.1.2.10-rc. 28417 - Prevent a denial-of-service attack by disallowing any 28418 zlib-compressed data whose compression factor is implausibly 28419 high. Fixes part of bug 2324; reported by "doorss". 28420 - Zero out a few more keys in memory before freeing them. Fixes 28421 bug 2384 and part of bug 2385. These key instances found by 28422 "cypherpunks", based on Andrew Case's report about being able 28423 to find sensitive data in Tor's memory space if you have enough 28424 permissions. Bugfix on 0.0.2pre9. 28425 28426 o Major bugfixes (crashes), also included in 0.2.1.29: 28427 - Prevent calls to Libevent from inside Libevent log handlers. 28428 This had potential to cause a nasty set of crashes, especially 28429 if running Libevent with debug logging enabled, and running 28430 Tor with a controller watching for low-severity log messages. 28431 Bugfix on 0.1.0.2-rc. Fixes bug 2190. 28432 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid 28433 underflow errors there too. Fixes the other part of bug 2324. 28434 - Fix a bug where we would assert if we ever had a 28435 cached-descriptors.new file (or another file read directly into 28436 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix 28437 on 0.2.1.25. Found by doorss. 28438 - Fix some potential asserts and parsing issues with grossly 28439 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27. 28440 Found by doorss. 28441 28442 o Minor bugfixes (other), also included in 0.2.1.29: 28443 - Fix a bug with handling misformed replies to reverse DNS lookup 28444 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a 28445 bug reported by doorss. 28446 - Fix compilation on mingw when a pthreads compatibility library 28447 has been installed. (We don't want to use it, so we shouldn't 28448 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc. 28449 - Fix a bug where we would declare that we had run out of virtual 28450 addresses when the address space was only half-exhausted. Bugfix 28451 on 0.1.2.1-alpha. 28452 - Correctly handle the case where AutomapHostsOnResolve is set but 28453 no virtual addresses are available. Fixes bug 2328; bugfix on 28454 0.1.2.1-alpha. Bug found by doorss. 28455 - Correctly handle wrapping around when we run out of virtual 28456 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha. 28457 28458 o Minor features, also included in 0.2.1.29: 28459 - Update to the January 1 2011 Maxmind GeoLite Country database. 28460 - Introduce output size checks on all of our decryption functions. 28461 28462 o Build changes, also included in 0.2.1.29: 28463 - Tor does not build packages correctly with Automake 1.6 and earlier; 28464 added a check to Makefile.am to make sure that we're building with 28465 Automake 1.7 or later. 28466 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c 28467 because we built it with a too-old version of automake. Thus that 28468 release broke ./configure --enable-openbsd-malloc, which is popular 28469 among really fast exit relays on Linux. 28470 28471 o Major bugfixes, new in 0.2.2.21-alpha: 28472 - Prevent crash/heap corruption when the cbtnummodes consensus 28473 parameter is set to 0 or large values. Fixes bug 2317; bugfix 28474 on 0.2.2.14-alpha. 28475 28476 o Major features, new in 0.2.2.21-alpha: 28477 - Introduce minimum/maximum values that clients will believe 28478 from the consensus. Now we'll have a better chance to avoid crashes 28479 or worse when a consensus param has a weird value. 28480 28481 o Minor features, new in 0.2.2.21-alpha: 28482 - Make sure to disable DirPort if running as a bridge. DirPorts aren't 28483 used on bridges, and it makes bridge scanning somewhat easier. 28484 - If writing the state file to disk fails, wait up to an hour before 28485 retrying again, rather than trying again each second. Fixes bug 28486 2346; bugfix on Tor 0.1.1.3-alpha. 28487 - Make Libevent log messages get delivered to controllers later, 28488 and not from inside the Libevent log handler. This prevents unsafe 28489 reentrant Libevent calls while still letting the log messages 28490 get through. 28491 - Detect platforms that brokenly use a signed size_t, and refuse to 28492 build there. Found and analyzed by doorss and rransom. 28493 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5. 28494 Resolves bug 2314. 28495 28496 o Minor bugfixes, new in 0.2.2.21-alpha: 28497 - Handle SOCKS messages longer than 128 bytes long correctly, rather 28498 than waiting forever for them to finish. Fixes bug 2330; bugfix 28499 on 0.2.0.16-alpha. Found by doorss. 28500 - Add assertions to check for overflow in arguments to 28501 base32_encode() and base32_decode(); fix a signed-unsigned 28502 comparison there too. These bugs are not actually reachable in Tor, 28503 but it's good to prevent future errors too. Found by doorss. 28504 - Correctly detect failures to create DNS requests when using Libevent 28505 versions before v2. (Before Libevent 2, we used our own evdns 28506 implementation. Its return values for Libevent's evdns_resolve_*() 28507 functions are not consistent with those from Libevent.) Fixes bug 28508 2363; bugfix on 0.2.2.6-alpha. Found by "lodger". 28509 28510 o Documentation, new in 0.2.2.21-alpha: 28511 - Document the default socks host and port (127.0.0.1:9050) for 28512 tor-resolve. 28513 28514 28515Changes in version 0.2.1.29 - 2011-01-15 28516 Tor 0.2.1.29 continues our recent code security audit work. The main 28517 fix resolves a remote heap overflow vulnerability that can allow remote 28518 code execution. Other fixes address a variety of assert and crash bugs, 28519 most of which we think are hard to exploit remotely. 28520 28521 o Major bugfixes (security): 28522 - Fix a heap overflow bug where an adversary could cause heap 28523 corruption. This bug probably allows remote code execution 28524 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on 28525 0.1.2.10-rc. 28526 - Prevent a denial-of-service attack by disallowing any 28527 zlib-compressed data whose compression factor is implausibly 28528 high. Fixes part of bug 2324; reported by "doorss". 28529 - Zero out a few more keys in memory before freeing them. Fixes 28530 bug 2384 and part of bug 2385. These key instances found by 28531 "cypherpunks", based on Andrew Case's report about being able 28532 to find sensitive data in Tor's memory space if you have enough 28533 permissions. Bugfix on 0.0.2pre9. 28534 28535 o Major bugfixes (crashes): 28536 - Prevent calls to Libevent from inside Libevent log handlers. 28537 This had potential to cause a nasty set of crashes, especially 28538 if running Libevent with debug logging enabled, and running 28539 Tor with a controller watching for low-severity log messages. 28540 Bugfix on 0.1.0.2-rc. Fixes bug 2190. 28541 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid 28542 underflow errors there too. Fixes the other part of bug 2324. 28543 - Fix a bug where we would assert if we ever had a 28544 cached-descriptors.new file (or another file read directly into 28545 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix 28546 on 0.2.1.25. Found by doorss. 28547 - Fix some potential asserts and parsing issues with grossly 28548 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27. 28549 Found by doorss. 28550 28551 o Minor bugfixes (other): 28552 - Fix a bug with handling misformed replies to reverse DNS lookup 28553 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a 28554 bug reported by doorss. 28555 - Fix compilation on mingw when a pthreads compatibility library 28556 has been installed. (We don't want to use it, so we shouldn't 28557 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc. 28558 - Fix a bug where we would declare that we had run out of virtual 28559 addresses when the address space was only half-exhausted. Bugfix 28560 on 0.1.2.1-alpha. 28561 - Correctly handle the case where AutomapHostsOnResolve is set but 28562 no virtual addresses are available. Fixes bug 2328; bugfix on 28563 0.1.2.1-alpha. Bug found by doorss. 28564 - Correctly handle wrapping around to when we run out of virtual 28565 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha. 28566 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c 28567 because we built it with a too-old version of automake. Thus that 28568 release broke ./configure --enable-openbsd-malloc, which is popular 28569 among really fast exit relays on Linux. 28570 28571 o Minor features: 28572 - Update to the January 1 2011 Maxmind GeoLite Country database. 28573 - Introduce output size checks on all of our decryption functions. 28574 28575 o Build changes: 28576 - Tor does not build packages correctly with Automake 1.6 and earlier; 28577 added a check to Makefile.am to make sure that we're building with 28578 Automake 1.7 or later. 28579 28580 28581Changes in version 0.2.2.20-alpha - 2010-12-17 28582 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely 28583 exploitable bugs. We also fix a variety of other significant bugs, 28584 change the IP address for one of our directory authorities, and update 28585 the minimum version that Tor relays must run to join the network. 28586 28587 o Major bugfixes: 28588 - Fix a remotely exploitable bug that could be used to crash instances 28589 of Tor remotely by overflowing on the heap. Remote-code execution 28590 hasn't been confirmed, but can't be ruled out. Everyone should 28591 upgrade. Bugfix on the 0.1.1 series and later. 28592 - Fix a bug that could break accounting on 64-bit systems with large 28593 time_t values, making them hibernate for impossibly long intervals. 28594 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper. 28595 - Fix a logic error in directory_fetches_from_authorities() that 28596 would cause all _non_-exits refusing single-hop-like circuits 28597 to fetch from authorities, when we wanted to have _exits_ fetch 28598 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha; 28599 fix by boboper. 28600 - Fix a stream fairness bug that would cause newer streams on a given 28601 circuit to get preference when reading bytes from the origin or 28602 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was 28603 introduced before the first Tor release, in svn revision r152. 28604 28605 o Directory authority changes: 28606 - Change IP address and ports for gabelmoo (v3 directory authority). 28607 28608 o Minor bugfixes: 28609 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235. 28610 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper. 28611 - Fix an off-by-one error in calculating some controller command 28612 argument lengths. Fortunately, this mistake is harmless since 28613 the controller code does redundant NUL termination too. Found by 28614 boboper. Bugfix on 0.1.1.1-alpha. 28615 - Do not dereference NULL if a bridge fails to build its 28616 extra-info descriptor. Found by an anonymous commenter on 28617 Trac. Bugfix on 0.2.2.19-alpha. 28618 28619 o Minor features: 28620 - Update to the December 1 2010 Maxmind GeoLite Country database. 28621 - Directory authorities now reject relays running any versions of 28622 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have 28623 known bugs that keep RELAY_EARLY cells from working on rendezvous 28624 circuits. Followup to fix for bug 2081. 28625 - Directory authorities now reject relays running any version of Tor 28626 older than 0.2.0.26-rc. That version is the earliest that fetches 28627 current directory information correctly. Fixes bug 2156. 28628 - Report only the top 10 ports in exit-port stats in order not to 28629 exceed the maximum extra-info descriptor length of 50 KB. Implements 28630 task 2196. 28631 28632 28633Changes in version 0.2.1.28 - 2010-12-17 28634 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely 28635 exploitable bugs. We also took this opportunity to change the IP address 28636 for one of our directory authorities, and to update the geoip database 28637 we ship. 28638 28639 o Major bugfixes: 28640 - Fix a remotely exploitable bug that could be used to crash instances 28641 of Tor remotely by overflowing on the heap. Remote-code execution 28642 hasn't been confirmed, but can't be ruled out. Everyone should 28643 upgrade. Bugfix on the 0.1.1 series and later. 28644 28645 o Directory authority changes: 28646 - Change IP address and ports for gabelmoo (v3 directory authority). 28647 28648 o Minor features: 28649 - Update to the December 1 2010 Maxmind GeoLite Country database. 28650 28651 28652Changes in version 0.2.1.27 - 2010-11-23 28653 Yet another OpenSSL security patch broke its compatibility with Tor: 28654 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We 28655 also took this opportunity to fix several crash bugs, integrate a new 28656 directory authority, and update the bundled GeoIP database. 28657 28658 o Major bugfixes: 28659 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b: 28660 No longer set the tlsext_host_name extension on server SSL objects; 28661 but continue to set it on client SSL objects. Our goal in setting 28662 it was to imitate a browser, not a vhosting server. Fixes bug 2204; 28663 bugfix on 0.2.1.1-alpha. 28664 - Do not log messages to the controller while shrinking buffer 28665 freelists. Doing so would sometimes make the controller connection 28666 try to allocate a buffer chunk, which would mess up the internals 28667 of the freelist and cause an assertion failure. Fixes bug 1125; 28668 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha. 28669 - Learn our external IP address when we're a relay or bridge, even if 28670 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha, 28671 where we introduced bridge relays that don't need to publish to 28672 be useful. Fixes bug 2050. 28673 - Do even more to reject (and not just ignore) annotations on 28674 router descriptors received anywhere but from the cache. Previously 28675 we would ignore such annotations at first, but cache them to disk 28676 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer. 28677 - When you're using bridges and your network goes away and your 28678 bridges get marked as down, recover when you attempt a new socks 28679 connection (if the network is back), rather than waiting up to an 28680 hour to try fetching new descriptors for your bridges. Bugfix on 28681 0.2.0.3-alpha; fixes bug 1981. 28682 28683 o Major features: 28684 - Move to the November 2010 Maxmind GeoLite country db (rather 28685 than the June 2009 ip-to-country GeoIP db) for our statistics that 28686 count how many users relays are seeing from each country. Now we'll 28687 have more accurate data, especially for many African countries. 28688 28689 o New directory authorities: 28690 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory 28691 authority. 28692 28693 o Minor bugfixes: 28694 - Fix an assertion failure that could occur in directory caches or 28695 bridge users when using a very short voting interval on a testing 28696 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 28697 0.2.0.8-alpha. 28698 - Enforce multiplicity rules when parsing annotations. Bugfix on 28699 0.2.0.8-alpha. Found by piebeer. 28700 - Allow handshaking OR connections to take a full KeepalivePeriod 28701 seconds to handshake. Previously, we would close them after 28702 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they 28703 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san 28704 for analysis help. 28705 - When building with --enable-gcc-warnings on OpenBSD, disable 28706 warnings in system headers. This makes --enable-gcc-warnings 28707 pass on OpenBSD 4.8. 28708 28709 o Minor features: 28710 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code, 28711 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new 28712 stream ending reason for this case: END_STREAM_REASON_NOROUTE. 28713 Servers can start sending this code when enough clients recognize 28714 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793. 28715 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8. 28716 Patch from mingw-san. 28717 28718 o Removed files: 28719 - Remove the old debian/ directory from the main Tor distribution. 28720 The official Tor-for-debian git repository lives at the URL 28721 https://git.torproject.org/debian/tor.git 28722 - Stop shipping the old doc/website/ directory in the tarball. We 28723 changed the website format in late 2010, and what we shipped in 28724 0.2.1.26 really wasn't that useful anyway. 28725 28726 28727Changes in version 0.2.2.19-alpha - 2010-11-22 28728 Yet another OpenSSL security patch broke its compatibility with Tor: 28729 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b. 28730 28731 o Major bugfixes: 28732 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b: 28733 No longer set the tlsext_host_name extension on server SSL objects; 28734 but continue to set it on client SSL objects. Our goal in setting 28735 it was to imitate a browser, not a vhosting server. Fixes bug 2204; 28736 bugfix on 0.2.1.1-alpha. 28737 28738 o Minor bugfixes: 28739 - Try harder not to exceed the maximum length of 50 KB when writing 28740 statistics to extra-info descriptors. This bug was triggered by very 28741 fast relays reporting exit-port, entry, and dirreq statistics. 28742 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183. 28743 - Publish a router descriptor even if generating an extra-info 28744 descriptor fails. Previously we would not publish a router 28745 descriptor without an extra-info descriptor; this can cause fast 28746 exit relays collecting exit-port statistics to drop from the 28747 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195. 28748 28749 28750Changes in version 0.2.2.18-alpha - 2010-11-16 28751 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging 28752 us lately, makes unpublished bridge relays able to detect their IP 28753 address, and fixes a wide variety of other bugs to get us much closer 28754 to a stable release. 28755 28756 o Major bugfixes: 28757 - Do even more to reject (and not just ignore) annotations on 28758 router descriptors received anywhere but from the cache. Previously 28759 we would ignore such annotations at first, but cache them to disk 28760 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer. 28761 - Do not log messages to the controller while shrinking buffer 28762 freelists. Doing so would sometimes make the controller connection 28763 try to allocate a buffer chunk, which would mess up the internals 28764 of the freelist and cause an assertion failure. Fixes bug 1125; 28765 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha. 28766 - Learn our external IP address when we're a relay or bridge, even if 28767 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha, 28768 where we introduced bridge relays that don't need to publish to 28769 be useful. Fixes bug 2050. 28770 - Maintain separate TLS contexts and certificates for incoming and 28771 outgoing connections in bridge relays. Previously we would use the 28772 same TLS contexts and certs for incoming and outgoing connections. 28773 Bugfix on 0.2.0.3-alpha; addresses bug 988. 28774 - Maintain separate identity keys for incoming and outgoing TLS 28775 contexts in bridge relays. Previously we would use the same 28776 identity keys for incoming and outgoing TLS contexts. Bugfix on 28777 0.2.0.3-alpha; addresses the other half of bug 988. 28778 - Avoid an assertion failure when we as an authority receive a 28779 duplicate upload of a router descriptor that we already have, 28780 but which we previously considered an obsolete descriptor. 28781 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha. 28782 - Avoid a crash bug triggered by looking at a dangling pointer while 28783 setting the network status consensus. Found by Robert Ransom. 28784 Bugfix on 0.2.2.17-alpha. Fixes bug 2097. 28785 - Fix a logic error where servers that _didn't_ act as exits would 28786 try to keep their server lists more aggressively up to date than 28787 exits, when it was supposed to be the other way around. Bugfix 28788 on 0.2.2.17-alpha. 28789 28790 o Minor bugfixes (on Tor 0.2.1.x and earlier): 28791 - When we're trying to guess whether we know our IP address as 28792 a relay, we would log various ways that we failed to guess 28793 our address, but never log that we ended up guessing it 28794 successfully. Now add a log line to help confused and anxious 28795 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534. 28796 - Bring the logic that gathers routerinfos and assesses the 28797 acceptability of circuits into line. This prevents a Tor OP from 28798 getting locked in a cycle of choosing its local OR as an exit for a 28799 path (due to a .exit request) and then rejecting the circuit because 28800 its OR is not listed yet. It also prevents Tor clients from using an 28801 OR running in the same instance as an exit (due to a .exit request) 28802 if the OR does not meet the same requirements expected of an OR 28803 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc. 28804 - Correctly describe errors that occur when generating a TLS object. 28805 Previously we would attribute them to a failure while generating a 28806 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes 28807 bug 1994. 28808 - Enforce multiplicity rules when parsing annotations. Bugfix on 28809 0.2.0.8-alpha. Found by piebeer. 28810 - Fix warnings that newer versions of autoconf produced during 28811 ./autogen.sh. These warnings appear to be harmless in our case, 28812 but they were extremely verbose. Fixes bug 2020. 28813 28814 o Minor bugfixes (on Tor 0.2.2.x): 28815 - Enable protection of small arrays whenever we build with gcc 28816 hardening features, not only when also building with warnings 28817 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb. 28818 28819 o Minor features: 28820 - Make hidden services work better in private Tor networks by not 28821 requiring any uptime to join the hidden service descriptor 28822 DHT. Implements ticket 2088. 28823 - Rate-limit the "your application is giving Tor only an IP address" 28824 warning. Addresses bug 2000; bugfix on 0.0.8pre2. 28825 - When AllowSingleHopExits is set, print a warning to explain to the 28826 relay operator why most clients are avoiding her relay. 28827 - Update to the November 1 2010 Maxmind GeoLite Country database. 28828 28829 o Code simplifications and refactoring: 28830 - When we fixed bug 1038 we had to put in a restriction not to send 28831 RELAY_EARLY cells on rend circuits. This was necessary as long 28832 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were 28833 active. Now remove this obsolete check. Resolves bug 2081. 28834 - Some options used different conventions for uppercasing of acronyms 28835 when comparing manpage and source. Fix those in favor of the 28836 manpage, as it makes sense to capitalize acronyms. 28837 - Remove the torrc.complete file. It hasn't been kept up to date 28838 and users will have better luck checking out the manpage. 28839 - Remove the obsolete "NoPublish" option; it has been flagged 28840 as obsolete and has produced a warning since 0.1.1.18-rc. 28841 - Remove everything related to building the expert bundle for OS X. 28842 It has confused many users, doesn't work right on OS X 10.6, 28843 and is hard to get rid of once installed. Resolves bug 1274. 28844 28845 28846Changes in version 0.2.2.17-alpha - 2010-09-30 28847 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients 28848 to use one-hop circuits (which can put the exit relays at higher risk, 28849 plus unbalance the network); fixes a big bug in bandwidth accounting 28850 for relays that want to limit their monthly bandwidth use; fixes a 28851 big pile of bugs in how clients tolerate temporary network failure; 28852 and makes our adaptive circuit build timeout feature (which improves 28853 client performance if your network is fast while not breaking things 28854 if your network is slow) better handle bad networks. 28855 28856 o Major features: 28857 - Exit relays now try harder to block exit attempts from unknown 28858 relays, to make it harder for people to use them as one-hop proxies 28859 a la tortunnel. Controlled by the refuseunknownexits consensus 28860 parameter (currently enabled), or you can override it on your 28861 relay with the RefuseUnknownExits torrc option. Resolves bug 1751. 28862 28863 o Major bugfixes (0.2.1.x and earlier): 28864 - Fix a bug in bandwidth accounting that could make us use twice 28865 the intended bandwidth when our interval start changes due to 28866 daylight saving time. Now we tolerate skew in stored vs computed 28867 interval starts: if the start of the period changes by no more than 28868 50% of the period's duration, we remember bytes that we transferred 28869 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5. 28870 - Always search the Windows system directory for system DLLs, and 28871 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954. 28872 - When you're using bridges and your network goes away and your 28873 bridges get marked as down, recover when you attempt a new socks 28874 connection (if the network is back), rather than waiting up to an 28875 hour to try fetching new descriptors for your bridges. Bugfix on 28876 0.2.0.3-alpha; fixes bug 1981. 28877 28878 o Major bugfixes (on 0.2.2.x): 28879 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to 28880 bug 1797. 28881 - Fix a segfault that could happen when operating a bridge relay with 28882 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha. 28883 - The consensus bandwidth-weights (used by clients to choose fast 28884 relays) entered an unexpected edge case in September where 28885 Exits were much scarcer than Guards, resulting in bad weight 28886 recommendations. Now we compute them using new constraints that 28887 should succeed in all cases. Also alter directory authorities to 28888 not include the bandwidth-weights line if they fail to produce 28889 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha. 28890 - When weighting bridges during path selection, we used to trust 28891 the bandwidths they provided in their descriptor, only capping them 28892 at 10MB/s. This turned out to be problematic for two reasons: 28893 Bridges could claim to handle a lot more traffic then they 28894 actually would, thus making more clients pick them and have a 28895 pretty effective DoS attack. The other issue is that new bridges 28896 that might not have a good estimate for their bw capacity yet 28897 would not get used at all unless no other bridges are available 28898 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha. 28899 28900 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x): 28901 - Ignore cannibalized circuits when recording circuit build times. 28902 This should provide for a minor performance improvement for hidden 28903 service users using 0.2.2.14-alpha, and should remove two spurious 28904 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740. 28905 - Simplify the logic that causes us to decide if the network is 28906 unavailable for purposes of recording circuit build times. If we 28907 receive no cells whatsoever for the entire duration of a circuit's 28908 full measured lifetime, the network is probably down. Also ignore 28909 one-hop directory fetching circuit timeouts when calculating our 28910 circuit build times. These changes should hopefully reduce the 28911 cases where we see ridiculous circuit build timeouts for people 28912 with spotty wireless connections. Fixes part of bug 1772; bugfix 28913 on 0.2.2.2-alpha. 28914 - Prevent the circuit build timeout from becoming larger than 28915 the maximum build time we have ever seen. Also, prevent the time 28916 period for measurement circuits from becoming larger than twice that 28917 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha. 28918 28919 o Minor features: 28920 - When we run out of directory information such that we can't build 28921 circuits, but then get enough that we can build circuits, log when 28922 we actually construct a circuit, so the user has a better chance of 28923 knowing what's going on. Fixes bug 1362. 28924 - Be more generous with how much bandwidth we'd use up (with 28925 accounting enabled) before entering "soft hibernation". Previously, 28926 we'd refuse new connections and circuits once we'd used up 95% of 28927 our allotment. Now, we use up 95% of our allotment, AND make sure 28928 that we have no more than 500MB (or 3 hours of expected traffic, 28929 whichever is lower) remaining before we enter soft hibernation. 28930 - If we've configured EntryNodes and our network goes away and/or all 28931 our entrynodes get marked down, optimistically retry them all when 28932 a new socks application request appears. Fixes bug 1882. 28933 - Add some more defensive programming for architectures that can't 28934 handle unaligned integer accesses. We don't know of any actual bugs 28935 right now, but that's the best time to fix them. Fixes bug 1943. 28936 - Support line continuations in the torrc config file. If a line 28937 ends with a single backslash character, the newline is ignored, and 28938 the configuration value is treated as continuing on the next line. 28939 Resolves bug 1929. 28940 28941 o Minor bugfixes (on 0.2.1.x and earlier): 28942 - For bandwidth accounting, calculate our expected bandwidth rate 28943 based on the time during which we were active and not in 28944 soft-hibernation during the last interval. Previously, we were 28945 also considering the time spent in soft-hibernation. If this 28946 was a long time, we would wind up underestimating our bandwidth 28947 by a lot, and skewing our wakeup time towards the start of the 28948 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5. 28949 28950 o Minor bugfixes (on 0.2.2.x): 28951 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages, 28952 which were disabled by the circuit build timeout changes in 28953 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739. 28954 - Make sure we don't warn about missing bandwidth weights when 28955 choosing bridges or other relays not in the consensus. Bugfix on 28956 0.2.2.10-alpha; fixes bug 1805. 28957 - In our logs, do not double-report signatures from unrecognized 28958 authorities both as "from unknown authority" and "not 28959 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha. 28960 28961 28962Changes in version 0.2.2.16-alpha - 2010-09-17 28963 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most 28964 evident at exit relays), and also continues to resolve all the little 28965 bugs that have been filling up trac lately. 28966 28967 o Major bugfixes (stream-level fairness): 28968 - When receiving a circuit-level SENDME for a blocked circuit, try 28969 to package cells fairly from all the streams that had previously 28970 been blocked on that circuit. Previously, we had started with the 28971 oldest stream, and allowed each stream to potentially exhaust 28972 the circuit's package window. This gave older streams on any 28973 given circuit priority over newer ones. Fixes bug 1937. Detected 28974 originally by Camilo Viecco. This bug was introduced before the 28975 first Tor release, in svn commit r152: it is the new winner of 28976 the longest-lived bug prize. 28977 - When the exit relay got a circuit-level sendme cell, it started 28978 reading on the exit streams, even if had 500 cells queued in the 28979 circuit queue already, so the circuit queue just grew and grew in 28980 some cases. We fix this by not re-enabling reading on receipt of a 28981 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix 28982 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by 28983 "yetonetime". 28984 - Newly created streams were allowed to read cells onto circuits, 28985 even if the circuit's cell queue was blocked and waiting to drain. 28986 This created potential unfairness, as older streams would be 28987 blocked, but newer streams would gladly fill the queue completely. 28988 We add code to detect this situation and prevent any stream from 28989 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially 28990 fixes bug 1298. 28991 28992 o Minor features: 28993 - Update to the September 1 2010 Maxmind GeoLite Country database. 28994 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is 28995 not. This would lead to a cookie that is still not group readable. 28996 Closes bug 1843. Suggested by katmagic. 28997 - When logging a rate-limited warning, we now mention how many messages 28998 got suppressed since the last warning. 28999 - Add new "perconnbwrate" and "perconnbwburst" consensus params to 29000 do individual connection-level rate limiting of clients. The torrc 29001 config options with the same names trump the consensus params, if 29002 both are present. Replaces the old "bwconnrate" and "bwconnburst" 29003 consensus params which were broken from 0.2.2.7-alpha through 29004 0.2.2.14-alpha. Closes bug 1947. 29005 - When a router changes IP address or port, authorities now launch 29006 a new reachability test for it. Implements ticket 1899. 29007 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad, 29008 2 no signature, 4 required" messages about consensus signatures 29009 easier to read, and make sure they get logged at the same severity 29010 as the messages explaining which keys are which. Fixes bug 1290. 29011 - Don't warn when we have a consensus that we can't verify because 29012 of missing certificates, unless those certificates are ones 29013 that we have been trying and failing to download. Fixes bug 1145. 29014 - If you configure your bridge with a known identity fingerprint, 29015 and the bridge authority is unreachable (as it is in at least 29016 one country now), fall back to directly requesting the descriptor 29017 from the bridge. Finishes the feature started in 0.2.0.10-alpha; 29018 closes bug 1138. 29019 - When building with --enable-gcc-warnings on OpenBSD, disable 29020 warnings in system headers. This makes --enable-gcc-warnings 29021 pass on OpenBSD 4.8. 29022 29023 o Minor bugfixes (on 0.2.1.x and earlier): 29024 - Authorities will now attempt to download consensuses if their 29025 own efforts to make a live consensus have failed. This change 29026 means authorities that restart will fetch a valid consensus, and 29027 it means authorities that didn't agree with the current consensus 29028 will still fetch and serve it if it has enough signatures. Bugfix 29029 on 0.2.0.9-alpha; fixes bug 1300. 29030 - Ensure DNS requests launched by "RESOLVE" commands from the 29031 controller respect the __LeaveStreamsUnattached setconf options. The 29032 same goes for requests launched via DNSPort or transparent 29033 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525. 29034 - Allow handshaking OR connections to take a full KeepalivePeriod 29035 seconds to handshake. Previously, we would close them after 29036 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they 29037 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san 29038 for analysis help. 29039 - Rate-limit "Failed to hand off onionskin" warnings. 29040 - Never relay a cell for a circuit we have already destroyed. 29041 Between marking a circuit as closeable and finally closing it, 29042 it may have been possible for a few queued cells to get relayed, 29043 even though they would have been immediately dropped by the next 29044 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha. 29045 - Never queue a cell for a circuit that's already been marked 29046 for close. 29047 - Never vote for a server as "Running" if we have a descriptor for 29048 it claiming to be hibernating, and that descriptor was published 29049 more recently than our last contact with the server. Bugfix on 29050 0.2.0.3-alpha; fixes bug 911. 29051 - Squash a compile warning on OpenBSD. Reported by Tas; fixes 29052 bug 1848. 29053 29054 o Minor bugfixes (on 0.2.2.x): 29055 - Fix a regression introduced in 0.2.2.7-alpha that marked relays 29056 down if a directory fetch fails and you've configured either 29057 bridges or EntryNodes. The intent was to mark the relay as down 29058 _unless_ you're using bridges or EntryNodes, since if you are 29059 then you could quickly run out of entry points. 29060 - Fix the Windows directory-listing code. A bug introduced in 29061 0.2.2.14-alpha could make Windows directory servers forget to load 29062 some of their cached v2 networkstatus files. 29063 - Really allow clients to use relays as bridges. Fixes bug 1776; 29064 bugfix on 0.2.2.15-alpha. 29065 - Demote a warn to info that happens when the CellStatistics option 29066 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921. 29067 Reported by Moritz Bartl. 29068 - On Windows, build correctly either with or without Unicode support. 29069 This is necessary so that Tor can support fringe platforms like 29070 Windows 98 (which has no Unicode), or Windows CE (which has no 29071 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797. 29072 29073 o Testing 29074 - Add a unit test for cross-platform directory-listing code. 29075 29076 29077Changes in version 0.2.2.15-alpha - 2010-08-18 29078 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability, 29079 fixes a variety of other bugs that were preventing performance 29080 experiments from moving forward, fixes several bothersome memory leaks, 29081 and generally closes a lot of smaller bugs that have been filling up 29082 trac lately. 29083 29084 o Major bugfixes: 29085 - Stop assigning the HSDir flag to relays that disable their 29086 DirPort (and thus will refuse to answer directory requests). This 29087 fix should dramatically improve the reachability of hidden services: 29088 hidden services and hidden service clients pick six HSDir relays 29089 to store and retrieve the hidden service descriptor, and currently 29090 about half of the HSDir relays will refuse to work. Bugfix on 29091 0.2.0.10-alpha; fixes part of bug 1693. 29092 - The PerConnBWRate and Burst config options, along with the 29093 bwconnrate and bwconnburst consensus params, initialized each conn's 29094 token bucket values only when the connection is established. Now we 29095 update them if the config options change, and update them every time 29096 we get a new consensus. Otherwise we can encounter an ugly edge 29097 case where we initialize an OR conn to client-level bandwidth, 29098 but then later the relay joins the consensus and we leave it 29099 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830. 29100 - Fix a regression that caused Tor to rebind its ports if it receives 29101 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919. 29102 29103 o Major features: 29104 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This 29105 should give us approximately 40-50% more Guard-flagged nodes, 29106 improving the anonymity the Tor network can provide and also 29107 decreasing the dropoff in throughput that relays experience when 29108 they first get the Guard flag. 29109 - Allow enabling or disabling the *Statistics config options while 29110 Tor is running. 29111 29112 o Minor features: 29113 - Update to the August 1 2010 Maxmind GeoLite Country database. 29114 - Have the controller interface give a more useful message than 29115 "Internal Error" in response to failed GETINFO requests. 29116 - Warn when the same option is provided more than once in a torrc 29117 file, on the command line, or in a single SETCONF statement, and 29118 the option is one that only accepts a single line. Closes bug 1384. 29119 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8. 29120 Patch from mingw-san. 29121 - Add support for the country code "{??}" in torrc options like 29122 ExcludeNodes, to indicate all routers of unknown country. Closes 29123 bug 1094. 29124 - Relays report the number of bytes spent on answering directory 29125 requests in extra-info descriptors similar to {read,write}-history. 29126 Implements enhancement 1790. 29127 29128 o Minor bugfixes (on 0.2.1.x and earlier): 29129 - Complain if PublishServerDescriptor is given multiple arguments that 29130 include 0 or 1. This configuration will be rejected in the future. 29131 Bugfix on 0.2.0.1-alpha; closes bug 1107. 29132 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration. 29133 Bugfix on 0.2.0.13-alpha; closes bug 928. 29134 - Change "Application request when we're believed to be offline." 29135 notice to "Application request when we haven't used client 29136 functionality lately.", to clarify that it's not an error. Bugfix 29137 on 0.0.9.3; fixes bug 1222. 29138 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl" 29139 would return "551 Internal error" rather than "552 Unrecognized key 29140 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha. 29141 - Users can't configure a regular relay to be their bridge. It didn't 29142 work because when Tor fetched the bridge descriptor, it found 29143 that it already had it, and didn't realize that the purpose of the 29144 descriptor had changed. Now we replace routers with a purpose other 29145 than bridge with bridge descriptors when fetching them. Bugfix on 29146 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately 29147 refetch the descriptor with router purpose 'general', disabling 29148 it as a bridge. 29149 - Fix a rare bug in rend_fn unit tests: we would fail a test when 29150 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix 29151 on 0.2.0.10-alpha; fixes bug 1808. 29152 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code, 29153 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new 29154 stream ending reason for this case: END_STREAM_REASON_NOROUTE. 29155 Servers can start sending this code when enough clients recognize 29156 it. Also update the spec to reflect this new reason. Bugfix on 29157 0.1.0.1-rc; fixes part of bug 1793. 29158 - Delay geoip stats collection by bridges for 6 hours, not 2 hours, 29159 when we switch from being a public relay to a bridge. Otherwise 29160 there will still be clients that see the relay in their consensus, 29161 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug 29162 932 even more. 29163 - Instead of giving an assertion failure on an internal mismatch 29164 on estimated freelist size, just log a BUG warning and try later. 29165 Mitigates but does not fix bug 1125. 29166 - Fix an assertion failure that could occur in caches or bridge users 29167 when using a very short voting interval on a testing network. 29168 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha. 29169 29170 o Minor bugfixes (on 0.2.2.x): 29171 - Alter directory authorities to always consider Exit-flagged nodes 29172 as potential Guard nodes in their votes. The actual decision to 29173 use Exits as Guards is done in the consensus bandwidth weights. 29174 Fixes bug 1294; bugfix on 0.2.2.10-alpha. 29175 - When the controller is reporting the purpose of circuits that 29176 didn't finish building before the circuit build timeout, it was 29177 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha. 29178 - Our libevent version parsing code couldn't handle versions like 29179 1.4.14b-stable and incorrectly warned the user about using an 29180 old and broken version of libevent. Treat 1.4.14b-stable like 29181 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix 29182 on 0.2.2.1-alpha. 29183 - Don't use substitution references like $(VAR:MOD) when 29184 $(asciidoc_files) is empty -- make(1) on NetBSD transforms 29185 '$(:x)' to 'x' rather than the empty string. This bites us in 29186 doc/ when configured with --disable-asciidoc. Bugfix on 29187 0.2.2.9-alpha; fixes bug 1773. 29188 - Remove a spurious hidden service server-side log notice about 29189 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes 29190 bug 1741. 29191 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha; 29192 fixes bug 1832. 29193 - Correctly report written bytes on linked connections. Found while 29194 implementing 1790. Bugfix on 0.2.2.4-alpha. 29195 - Fix three memory leaks: one in circuit_build_times_parse_state(), 29196 one in dirvote_add_signatures_to_pending_consensus(), and one every 29197 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha, 29198 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831. 29199 29200 o Code simplifications and refactoring: 29201 - Take a first step towards making or.h smaller by splitting out 29202 function definitions for all source files in src/or/. Leave 29203 structures and defines in or.h for now. 29204 - Remove a bunch of unused function declarations as well as a block of 29205 #if 0'd code from the unit tests. Closes bug 1824. 29206 - New unit tests for exit-port history statistics; refactored exit 29207 statistics code to be more easily tested. 29208 - Remove the old debian/ directory from the main Tor distribution. 29209 The official Tor-for-debian git repository lives at the URL 29210 https://git.torproject.org/debian/tor.git 29211 29212 29213Changes in version 0.2.2.14-alpha - 2010-07-12 29214 Tor 0.2.2.14-alpha greatly improves client-side handling of 29215 circuit build timeouts, which are used to estimate speed and improve 29216 performance. We also move to a much better GeoIP database, port Tor to 29217 Windows CE, introduce new compile flags that improve code security, 29218 add an eighth v3 directory authority, and address a lot of more 29219 minor issues. 29220 29221 o Major bugfixes: 29222 - Tor directory authorities no longer crash when started with a 29223 cached-microdesc-consensus file in their data directory. Bugfix 29224 on 0.2.2.6-alpha; fixes bug 1532. 29225 - Treat an unset $HOME like an empty $HOME rather than triggering an 29226 assert. Bugfix on 0.0.8pre1; fixes bug 1522. 29227 - Ignore negative and large circuit build timeout values that can 29228 happen during a suspend or hibernate. These values caused various 29229 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245. 29230 - Alter calculation of Pareto distribution parameter 'Xm' for 29231 Circuit Build Timeout learning to use the weighted average of the 29232 top N=3 modes (because we have three entry guards). Considering 29233 multiple modes should improve the timeout calculation in some cases, 29234 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha; 29235 fixes bug 1335. 29236 - Alter calculation of Pareto distribution parameter 'Alpha' to use a 29237 right censored distribution model. This approach improves over the 29238 synthetic timeout generation approach that was producing insanely 29239 high timeout values. Now we calculate build timeouts using truncated 29240 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335. 29241 - Do not close circuits that are under construction when they reach 29242 the circuit build timeout. Instead, leave them building (but do not 29243 use them) for up until the time corresponding to the 95th percentile 29244 on the Pareto CDF or 60 seconds, whichever is greater. This is done 29245 to provide better data for the new Pareto model. This percentile 29246 can be controlled by the consensus. 29247 29248 o Major features: 29249 - Move to the June 2010 Maxmind GeoLite country db (rather than the 29250 June 2009 ip-to-country GeoIP db) for our statistics that count 29251 how many users relays are seeing from each country. Now we have 29252 more accurate data for many African countries. 29253 - Port Tor to build and run correctly on Windows CE systems, using 29254 the wcecompat library. Contributed by Valerio Lupi. 29255 - New "--enable-gcc-hardening" ./configure flag (off by default) 29256 to turn on gcc compile time hardening options. It ensures 29257 that signed ints have defined behavior (-fwrapv), enables 29258 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection 29259 with canaries (-fstack-protector-all), turns on ASLR protection if 29260 supported by the kernel (-fPIE, -pie), and adds additional security 29261 related warnings. Verified to work on Mac OS X and Debian Lenny. 29262 - New "--enable-linker-hardening" ./configure flag (off by default) 29263 to turn on ELF specific hardening features (relro, now). This does 29264 not work with Mac OS X or any other non-ELF binary format. 29265 29266 o New directory authorities: 29267 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory 29268 authority. 29269 29270 o Minor features: 29271 - New config option "WarnUnsafeSocks 0" disables the warning that 29272 occurs whenever Tor receives a socks handshake using a version of 29273 the socks protocol that can only provide an IP address (rather 29274 than a hostname). Setups that do DNS locally over Tor are fine, 29275 and we shouldn't spam the logs in that case. 29276 - Convert the HACKING file to asciidoc, and add a few new sections 29277 to it, explaining how we use Git, how we make changelogs, and 29278 what should go in a patch. 29279 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port 29280 event, to give information on the current rate of circuit timeouts 29281 over our stored history. 29282 - Add ability to disable circuit build time learning via consensus 29283 parameter and via a LearnCircuitBuildTimeout config option. Also 29284 automatically disable circuit build time calculation if we are 29285 either a AuthoritativeDirectory, or if we fail to write our state 29286 file. Fixes bug 1296. 29287 - More gracefully handle corrupt state files, removing asserts 29288 in favor of saving a backup and resetting state. 29289 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer 29290 system headers. 29291 29292 o Minor bugfixes: 29293 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings 29294 enabled. 29295 - When a2x fails, mention that the user could disable manpages instead 29296 of trying to fix their asciidoc installation. 29297 - Where available, use Libevent 2.0's periodic timers so that our 29298 once-per-second cleanup code gets called even more closely to 29299 once per second than it would otherwise. Fixes bug 943. 29300 - If you run a bridge that listens on multiple IP addresses, and 29301 some user configures a bridge address that uses a different IP 29302 address than your bridge writes in its router descriptor, and the 29303 user doesn't specify an identity key, their Tor would discard the 29304 descriptor because "it isn't one of our configured bridges", and 29305 fail to bootstrap. Now believe the descriptor and bootstrap anyway. 29306 Bugfix on 0.2.0.3-alpha. 29307 - If OpenSSL fails to make a duplicate of a private or public key, log 29308 an error message and try to exit cleanly. May help with debugging 29309 if bug 1209 ever remanifests. 29310 - Save a couple bytes in memory allocation every time we escape 29311 certain characters in a string. Patch from Florian Zumbiehl. 29312 - Make it explicit that we don't cannibalize one-hop circuits. This 29313 happens in the wild, but doesn't turn out to be a problem because 29314 we fortunately don't use those circuits. Many thanks to outofwords 29315 for the initial analysis and to swissknife who confirmed that 29316 two-hop circuits are actually created. 29317 - Make directory mirrors report non-zero dirreq-v[23]-shares again. 29318 Fixes bug 1564; bugfix on 0.2.2.9-alpha. 29319 - Eliminate a case where a circuit build time warning was displayed 29320 after network connectivity resumed. Bugfix on 0.2.2.2-alpha. 29321 29322 29323Changes in version 0.2.1.26 - 2010-05-02 29324 Tor 0.2.1.26 addresses the recent connection and memory overload 29325 problems we've been seeing on relays, especially relays with their 29326 DirPort open. If your relay has been crashing, or you turned it off 29327 because it used too many resources, give this release a try. 29328 29329 This release also fixes yet another instance of broken OpenSSL libraries 29330 that was causing some relays to drop out of the consensus. 29331 29332 o Major bugfixes: 29333 - Teach relays to defend themselves from connection overload. Relays 29334 now close idle circuits early if it looks like they were intended 29335 for directory fetches. Relays are also more aggressive about closing 29336 TLS connections that have no circuits on them. Such circuits are 29337 unlikely to be re-used, and tens of thousands of them were piling 29338 up at the fast relays, causing the relays to run out of sockets 29339 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling 29340 their directory fetches over TLS). 29341 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos 29342 that claim to be earlier than 0.9.8m, but which have in reality 29343 backported huge swaths of 0.9.8m or 0.9.8n renegotiation 29344 behavior. Possible fix for some cases of bug 1346. 29345 - Directory mirrors were fetching relay descriptors only from v2 29346 directory authorities, rather than v3 authorities like they should. 29347 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading 29348 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324. 29349 29350 o Minor bugfixes: 29351 - Finally get rid of the deprecated and now harmful notion of "clique 29352 mode", where directory authorities maintain TLS connections to 29353 every other relay. 29354 29355 o Testsuite fixes: 29356 - In the util/threads test, no longer free the test_mutex before all 29357 worker threads have finished. Bugfix on 0.2.1.6-alpha. 29358 - The master thread could starve the worker threads quite badly on 29359 certain systems, causing them to run only partially in the allowed 29360 window. This resulted in test failures. Now the master thread sleeps 29361 occasionally for a few microseconds while the two worker-threads 29362 compete for the mutex. Bugfix on 0.2.0.1-alpha. 29363 29364 29365Changes in version 0.2.2.13-alpha - 2010-04-24 29366 Tor 0.2.2.13-alpha addresses the recent connection and memory overload 29367 problems we've been seeing on relays, especially relays with their 29368 DirPort open. If your relay has been crashing, or you turned it off 29369 because it used too many resources, give this release a try. 29370 29371 o Major bugfixes: 29372 - Teach relays to defend themselves from connection overload. Relays 29373 now close idle circuits early if it looks like they were intended 29374 for directory fetches. Relays are also more aggressive about closing 29375 TLS connections that have no circuits on them. Such circuits are 29376 unlikely to be re-used, and tens of thousands of them were piling 29377 up at the fast relays, causing the relays to run out of sockets 29378 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling 29379 their directory fetches over TLS). 29380 29381 o Minor features: 29382 - Finally get rid of the deprecated and now harmful notion of "clique 29383 mode", where directory authorities maintain TLS connections to 29384 every other relay. 29385 - Directory authorities now do an immediate reachability check as soon 29386 as they hear about a new relay. This change should slightly reduce 29387 the time between setting up a relay and getting listed as running 29388 in the consensus. It should also improve the time between setting 29389 up a bridge and seeing use by bridge users. 29390 - Directory authorities no longer launch a TLS connection to every 29391 relay as they startup. Now that we have 2k+ descriptors cached, 29392 the resulting network hiccup is becoming a burden. Besides, 29393 authorities already avoid voting about Running for the first half 29394 hour of their uptime. 29395 29396 29397Changes in version 0.2.2.12-alpha - 2010-04-20 29398 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities 29399 handle and vote on descriptors. It was causing relays to drop out of 29400 the consensus. 29401 29402 o Major bugfixes: 29403 - Many relays have been falling out of the consensus lately because 29404 not enough authorities know about their descriptor for them to get 29405 a majority of votes. When we deprecated the v2 directory protocol, 29406 we got rid of the only way that v3 authorities can hear from each 29407 other about other descriptors. Now authorities examine every v3 29408 vote for new descriptors, and fetch them from that authority. Bugfix 29409 on 0.2.1.23. 29410 - Fix two typos in tor_vasprintf() that broke the compile on Windows, 29411 and a warning in or.h related to bandwidth_weight_rule_t that 29412 prevented clean compile on OS X. Fixes bug 1363; bugfix on 29413 0.2.2.11-alpha. 29414 - Fix a segfault on relays when DirReqStatistics is enabled 29415 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on 29416 0.2.2.11-alpha. 29417 29418 o Minor bugfixes: 29419 - Demote a confusing TLS warning that relay operators might get when 29420 someone tries to talk to their OrPort. It is neither the operator's 29421 fault nor can they do anything about it. Fixes bug 1364; bugfix 29422 on 0.2.0.14-alpha. 29423 29424 29425Changes in version 0.2.2.11-alpha - 2010-04-15 29426 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL 29427 libraries that was causing some relays to drop out of the consensus. 29428 29429 o Major bugfixes: 29430 - Directory mirrors were fetching relay descriptors only from v2 29431 directory authorities, rather than v3 authorities like they should. 29432 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading 29433 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324. 29434 - Fix a parsing error that made every possible value of 29435 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix 29436 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to 29437 CircuitPriorityHalflifeMsec, so authorities can tell newer relays 29438 about the option without breaking older ones. 29439 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos 29440 that claim to be earlier than 0.9.8m, but which have in reality 29441 backported huge swaths of 0.9.8m or 0.9.8n renegotiation 29442 behavior. Possible fix for some cases of bug 1346. 29443 29444 o Minor features: 29445 - Experiment with a more aggressive approach to preventing clients 29446 from making one-hop exit streams. Exit relays who want to try it 29447 out can set "RefuseUnknownExits 1" in their torrc, and then look 29448 for "Attempt by %s to open a stream" log messages. Let us know 29449 how it goes! 29450 - Add support for statically linking zlib by specifying 29451 --enable-static-zlib, to go with our support for statically linking 29452 openssl and libevent. Resolves bug 1358. 29453 29454 o Minor bugfixes: 29455 - Fix a segfault that happens whenever a Tor client that is using 29456 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha; 29457 fixes bug 1341. 29458 - When we cleaned up the contrib/tor-exit-notice.html file, we left 29459 out the first line. Fixes bug 1295. 29460 - When building the manpage from a tarball, we required asciidoc, but 29461 the asciidoc -> roff/html conversion was already done for the 29462 tarball. Make 'make' complain only when we need asciidoc (either 29463 because we're compiling directly from git, or because we altered 29464 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha. 29465 - When none of the directory authorities vote on any params, Tor 29466 segfaulted when trying to make the consensus from the votes. We 29467 didn't trigger the bug in practice, because authorities do include 29468 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322. 29469 29470 o Testsuite fixes: 29471 - In the util/threads test, no longer free the test_mutex before all 29472 worker threads have finished. Bugfix on 0.2.1.6-alpha. 29473 - The master thread could starve the worker threads quite badly on 29474 certain systems, causing them to run only partially in the allowed 29475 window. This resulted in test failures. Now the master thread sleeps 29476 occasionally for a few microseconds while the two worker-threads 29477 compete for the mutex. Bugfix on 0.2.0.1-alpha. 29478 29479 29480Changes in version 0.2.2.10-alpha - 2010-03-07 29481 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that 29482 could prevent relays from guessing their IP address correctly. It also 29483 starts the groundwork for another client-side performance boost, since 29484 currently we're not making efficient use of relays that have both the 29485 Guard flag and the Exit flag. 29486 29487 o Major bugfixes: 29488 - Fix a regression from our patch for bug 1244 that caused relays 29489 to guess their IP address incorrectly if they didn't set Address 29490 in their torrc and/or their address fails to resolve. Bugfix on 29491 0.2.2.9-alpha; fixes bug 1269. 29492 29493 o Major features (performance): 29494 - Directory authorities now compute consensus weightings that instruct 29495 clients how to weight relays flagged as Guard, Exit, Guard+Exit, 29496 and no flag. Clients that use these weightings will distribute 29497 network load more evenly across these different relay types. The 29498 weightings are in the consensus so we can change them globally in 29499 the future. Extra thanks to "outofwords" for finding some nasty 29500 security bugs in the first implementation of this feature. 29501 29502 o Minor features (performance): 29503 - Always perform router selections using weighted relay bandwidth, 29504 even if we don't need a high capacity circuit at the time. Non-fast 29505 circuits now only differ from fast ones in that they can use relays 29506 not marked with the Fast flag. This "feature" could turn out to 29507 be a horrible bug; we should investigate more before it goes into 29508 a stable release. 29509 29510 o Minor features: 29511 - Allow disabling building of the manpages. Skipping the manpage 29512 speeds up the build considerably. 29513 29514 o Minor bugfixes (on 0.2.2.x): 29515 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity. 29516 Bugfix on 0.2.2.9-alpha. 29517 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst 29518 config option. Bugfix on 0.2.2.7-alpha. 29519 - Ship the asciidoc-helper file in the tarball, so that people can 29520 build from source if they want to, and touching the .1.txt files 29521 doesn't break the build. Bugfix on 0.2.2.9-alpha. 29522 29523 o Minor bugfixes (on 0.2.1.x or earlier): 29524 - Fix a dereference-then-NULL-check sequence when publishing 29525 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes 29526 bug 1255. 29527 - Fix another dereference-then-NULL-check sequence. Bugfix on 29528 0.2.1.14-rc. Discovered by ekir; fixes bug 1256. 29529 - Make sure we treat potentially not NUL-terminated strings correctly. 29530 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257. 29531 29532 o Code simplifications and refactoring: 29533 - Fix some urls in the exit notice file and make it XHTML1.1 strict 29534 compliant. Based on a patch from Christian Kujau. 29535 - Don't use sed in asciidoc-helper anymore. 29536 - Make the build process fail if asciidoc cannot be found and 29537 building with asciidoc isn't disabled. 29538 29539 29540Changes in version 0.2.2.9-alpha - 2010-02-22 29541 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the 29542 location of a directory authority, and cleans up a bunch of small bugs. 29543 29544 o Directory authority changes: 29545 - Change IP address for dannenberg (v3 directory authority), and 29546 remove moria2 (obsolete v1, v2 directory authority and v0 hidden 29547 service directory authority) from the list. 29548 29549 o Major bugfixes: 29550 - Make Tor work again on the latest OS X: when deciding whether to 29551 use strange flags to turn TLS renegotiation on, detect the OpenSSL 29552 version at run-time, not compile time. We need to do this because 29553 Apple doesn't update its dev-tools headers when it updates its 29554 libraries in a security patch. 29555 - Fix a potential buffer overflow in lookup_last_hid_serv_request() 29556 that could happen on 32-bit platforms with 64-bit time_t. Also fix 29557 a memory leak when requesting a hidden service descriptor we've 29558 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found 29559 by aakova. 29560 - Authorities could be tricked into giving out the Exit flag to relays 29561 that didn't allow exiting to any ports. This bug could screw 29562 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug 29563 1238. Bug discovered by Martin Kowalczyk. 29564 - When freeing a session key, zero it out completely. We only zeroed 29565 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and 29566 patched by ekir. Fixes bug 1254. 29567 29568 o Minor bugfixes: 29569 - Fix static compilation by listing the openssl libraries in the right 29570 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237. 29571 - Resume handling .exit hostnames in a special way: originally we 29572 stripped the .exit part and used the requested exit relay. In 29573 0.2.2.1-alpha we stopped treating them in any special way, meaning 29574 if you use a .exit address then Tor will pass it on to the exit 29575 relay. Now we reject the .exit stream outright, since that behavior 29576 might be more expected by the user. Found and diagnosed by Scott 29577 Bennett and Downie on or-talk. 29578 - Don't spam the controller with events when we have no file 29579 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting 29580 for log messages was already solved from bug 748.) 29581 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by 29582 "memcpyfail". 29583 - Make the DNSPort option work with libevent 2.x. Don't alter the 29584 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit. 29585 - Emit a GUARD DROPPED controller event for a case we missed. 29586 - Make more fields in the controller protocol case-insensitive, since 29587 control-spec.txt said they were. 29588 - Refactor resolve_my_address() to not use gethostbyname() anymore. 29589 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik. 29590 - Fix a spec conformance issue: the network-status-version token 29591 must be the first token in a v3 consensus or vote. Discovered by 29592 parakeep. Bugfix on 0.2.0.3-alpha. 29593 29594 o Code simplifications and refactoring: 29595 - Generate our manpage and HTML documentation using Asciidoc. This 29596 change should make it easier to maintain the documentation, and 29597 produce nicer HTML. 29598 - Remove the --enable-iphone option. According to reports from Marco 29599 Bonetti, Tor builds fine without any special tweaking on recent 29600 iPhone SDK versions. 29601 - Removed some unnecessary files from the source distribution. The 29602 AUTHORS file has now been merged into the people page on the 29603 website. The roadmaps and design doc can now be found in the 29604 projects directory in svn. 29605 - Enabled various circuit build timeout constants to be controlled 29606 by consensus parameters. Also set better defaults for these 29607 parameters based on experimentation on broadband and simulated 29608 high latency links. 29609 29610 o Minor features: 29611 - The 'EXTENDCIRCUIT' control port command can now be used with 29612 a circ id of 0 and no path. This feature will cause Tor to build 29613 a new 'fast' general purpose circuit using its own path selection 29614 algorithms. 29615 - Added a BUILDTIMEOUT_SET controller event to describe changes 29616 to the circuit build timeout. 29617 - Future-proof the controller protocol a bit by ignoring keyword 29618 arguments we do not recognize. 29619 - Expand homedirs passed to tor-checkkey. This should silence a 29620 coverity complaint about passing a user-supplied string into 29621 open() without checking it. 29622 29623 29624Changes in version 0.2.1.25 - 2010-03-16 29625 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could 29626 prevent relays from guessing their IP address correctly. It also fixes 29627 several minor potential security bugs. 29628 29629 o Major bugfixes: 29630 - Fix a regression from our patch for bug 1244 that caused relays 29631 to guess their IP address incorrectly if they didn't set Address 29632 in their torrc and/or their address fails to resolve. Bugfix on 29633 0.2.1.23; fixes bug 1269. 29634 - When freeing a session key, zero it out completely. We only zeroed 29635 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and 29636 patched by ekir. Fixes bug 1254. 29637 29638 o Minor bugfixes: 29639 - Fix a dereference-then-NULL-check sequence when publishing 29640 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes 29641 bug 1255. 29642 - Fix another dereference-then-NULL-check sequence. Bugfix on 29643 0.2.1.14-rc. Discovered by ekir; fixes bug 1256. 29644 - Make sure we treat potentially not NUL-terminated strings correctly. 29645 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257. 29646 29647 29648 29649Changes in version 0.2.1.24 - 2010-02-21 29650 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time 29651 for sure! 29652 29653 o Minor bugfixes: 29654 - Work correctly out-of-the-box with even more vendor-patched versions 29655 of OpenSSL. In particular, make it so Debian and OS X don't need 29656 customized patches to run/build. 29657 29658 29659Changes in version 0.2.1.23 - 2010-02-13 29660 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work 29661 again on the latest OS X, and updates the location of a directory 29662 authority. 29663 29664 o Major bugfixes (performance): 29665 - We were selecting our guards uniformly at random, and then weighting 29666 which of our guards we'd use uniformly at random. This imbalance 29667 meant that Tor clients were severely limited on throughput (and 29668 probably latency too) by the first hop in their circuit. Now we 29669 select guards weighted by currently advertised bandwidth. We also 29670 automatically discard guards picked using the old algorithm. Fixes 29671 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry. 29672 29673 o Major bugfixes: 29674 - Make Tor work again on the latest OS X: when deciding whether to 29675 use strange flags to turn TLS renegotiation on, detect the OpenSSL 29676 version at run-time, not compile time. We need to do this because 29677 Apple doesn't update its dev-tools headers when it updates its 29678 libraries in a security patch. 29679 - Fix a potential buffer overflow in lookup_last_hid_serv_request() 29680 that could happen on 32-bit platforms with 64-bit time_t. Also fix 29681 a memory leak when requesting a hidden service descriptor we've 29682 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found 29683 by aakova. 29684 29685 o Directory authority changes: 29686 - Change IP address for dannenberg (v3 directory authority), and 29687 remove moria2 (obsolete v1, v2 directory authority and v0 hidden 29688 service directory authority) from the list. 29689 29690 o Minor bugfixes: 29691 - Refactor resolve_my_address() to not use gethostbyname() anymore. 29692 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik. 29693 29694 o Minor features: 29695 - Avoid a mad rush at the beginning of each month when each client 29696 rotates half of its guards. Instead we spread the rotation out 29697 throughout the month, but we still avoid leaving a precise timestamp 29698 in the state file about when we first picked the guard. Improves 29699 over the behavior introduced in 0.1.2.17. 29700 29701 29702Changes in version 0.2.2.8-alpha - 2010-01-26 29703 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been 29704 causing bridge relays to disappear. If you're running a bridge, 29705 please upgrade. 29706 29707 o Major bugfixes: 29708 - Fix a memory corruption bug on bridges that occurred during the 29709 inclusion of stats data in extra-info descriptors. Also fix the 29710 interface for geoip_get_bridge_stats* to prevent similar bugs in 29711 the future. Diagnosis by Tas, patch by Karsten and Sebastian. 29712 Fixes bug 1208; bugfix on 0.2.2.7-alpha. 29713 29714 o Minor bugfixes: 29715 - Ignore OutboundBindAddress when connecting to localhost. 29716 Connections to localhost need to come _from_ localhost, or else 29717 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often 29718 refuse to listen. 29719 29720 29721Changes in version 0.2.2.7-alpha - 2010-01-19 29722 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well 29723 as laying the groundwork for further relay-side performance fixes. It 29724 also starts cleaning up client behavior with respect to the EntryNodes, 29725 ExitNodes, and StrictNodes config options. 29726 29727 This release also rotates two directory authority keys, due to a 29728 security breach of some of the Torproject servers. 29729 29730 o Directory authority changes: 29731 - Rotate keys (both v3 identity and relay identity) for moria1 29732 and gabelmoo. 29733 29734 o Major features (performance): 29735 - We were selecting our guards uniformly at random, and then weighting 29736 which of our guards we'd use uniformly at random. This imbalance 29737 meant that Tor clients were severely limited on throughput (and 29738 probably latency too) by the first hop in their circuit. Now we 29739 select guards weighted by currently advertised bandwidth. We also 29740 automatically discard guards picked using the old algorithm. Fixes 29741 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry. 29742 - When choosing which cells to relay first, relays can now favor 29743 circuits that have been quiet recently, to provide lower latency 29744 for low-volume circuits. By default, relays enable or disable this 29745 feature based on a setting in the consensus. You can override 29746 this default by using the new "CircuitPriorityHalflife" config 29747 option. Design and code by Ian Goldberg, Can Tang, and Chris 29748 Alexander. 29749 - Add separate per-conn write limiting to go with the per-conn read 29750 limiting. We added a global write limit in Tor 0.1.2.5-alpha, 29751 but never per-conn write limits. 29752 - New consensus params "bwconnrate" and "bwconnburst" to let us 29753 rate-limit client connections as they enter the network. It's 29754 controlled in the consensus so we can turn it on and off for 29755 experiments. It's starting out off. Based on proposal 163. 29756 29757 o Major features (relay selection options): 29758 - Switch to a StrictNodes config option, rather than the previous 29759 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a 29760 "StrictExcludeNodes" option. 29761 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes 29762 change during a config reload, mark and discard all our origin 29763 circuits. This fix should address edge cases where we change the 29764 config options and but then choose a circuit that we created before 29765 the change. 29766 - If EntryNodes or ExitNodes are set, be more willing to use an 29767 unsuitable (e.g. slow or unstable) circuit. The user asked for it, 29768 they get it. 29769 - Make EntryNodes config option much more aggressive even when 29770 StrictNodes is not set. Before it would prepend your requested 29771 entrynodes to your list of guard nodes, but feel free to use others 29772 after that. Now it chooses only from your EntryNodes if any of 29773 those are available, and only falls back to others if a) they're 29774 all down and b) StrictNodes is not set. 29775 - Now we refresh your entry guards from EntryNodes at each consensus 29776 fetch -- rather than just at startup and then they slowly rot as 29777 the network changes. 29778 29779 o Major bugfixes: 29780 - Stop bridge directory authorities from answering dbg-stability.txt 29781 directory queries, which would let people fetch a list of all 29782 bridge identities they track. Bugfix on 0.2.1.6-alpha. 29783 29784 o Minor features: 29785 - Log a notice when we get a new control connection. Now it's easier 29786 for security-conscious users to recognize when a local application 29787 is knocking on their controller door. Suggested by bug 1196. 29788 - New config option "CircuitStreamTimeout" to override our internal 29789 timeout schedule for how many seconds until we detach a stream from 29790 a circuit and try a new circuit. If your network is particularly 29791 slow, you might want to set this to a number like 60. 29792 - New controller command "getinfo config-text". It returns the 29793 contents that Tor would write if you send it a SAVECONF command, 29794 so the controller can write the file to disk itself. 29795 - New options for SafeLogging to allow scrubbing only log messages 29796 generated while acting as a relay. 29797 - Ship the bridges spec file in the tarball too. 29798 - Avoid a mad rush at the beginning of each month when each client 29799 rotates half of its guards. Instead we spread the rotation out 29800 throughout the month, but we still avoid leaving a precise timestamp 29801 in the state file about when we first picked the guard. Improves 29802 over the behavior introduced in 0.1.2.17. 29803 29804 o Minor bugfixes (compiling): 29805 - Fix compilation on OS X 10.3, which has a stub mlockall() but 29806 hides it. Bugfix on 0.2.2.6-alpha. 29807 - Fix compilation on Solaris by removing support for the 29808 DisableAllSwap config option. Solaris doesn't have an rlimit for 29809 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on 29810 0.2.2.6-alpha. 29811 29812 o Minor bugfixes (crashes): 29813 - Do not segfault when writing buffer stats when we haven't observed 29814 a single circuit to report about. Found by Fabian Lanze. Bugfix on 29815 0.2.2.1-alpha. 29816 - If we're in the pathological case where there's no exit bandwidth 29817 but there is non-exit bandwidth, or no guard bandwidth but there 29818 is non-guard bandwidth, don't crash during path selection. Bugfix 29819 on 0.2.0.3-alpha. 29820 - Fix an impossible-to-actually-trigger buffer overflow in relay 29821 descriptor generation. Bugfix on 0.1.0.15. 29822 29823 o Minor bugfixes (privacy): 29824 - Fix an instance where a Tor directory mirror might accidentally 29825 log the IP address of a misbehaving Tor client. Bugfix on 29826 0.1.0.1-rc. 29827 - Don't list Windows capabilities in relay descriptors. We never made 29828 use of them, and maybe it's a bad idea to publish them. Bugfix 29829 on 0.1.1.8-alpha. 29830 29831 o Minor bugfixes (other): 29832 - Resolve an edge case in path weighting that could make us misweight 29833 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1. 29834 - Fix statistics on client numbers by country as seen by bridges that 29835 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour 29836 intervals instead of variable 12-to-48-hour intervals. 29837 - After we free an internal connection structure, overwrite it 29838 with a different memory value than we use for overwriting a freed 29839 internal circuit structure. Should help with debugging. Suggested 29840 by bug 1055. 29841 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m 29842 too. 29843 29844 o Removed features: 29845 - Remove the HSAuthorityRecordStats option that version 0 hidden 29846 service authorities could have used to track statistics of overall 29847 hidden service usage. 29848 29849 29850Changes in version 0.2.1.22 - 2010-01-19 29851 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory 29852 authorities -- it would tell you its whole history of bridge descriptors 29853 if you make the right directory request. This stable update also 29854 rotates two of the seven v3 directory authority keys and locations. 29855 29856 o Directory authority changes: 29857 - Rotate keys (both v3 identity and relay identity) for moria1 29858 and gabelmoo. 29859 29860 o Major bugfixes: 29861 - Stop bridge directory authorities from answering dbg-stability.txt 29862 directory queries, which would let people fetch a list of all 29863 bridge identities they track. Bugfix on 0.2.1.6-alpha. 29864 29865 29866Changes in version 0.2.1.21 - 2009-12-21 29867 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL 29868 library. If you use Tor on Linux / Unix and you're getting SSL 29869 renegotiation errors, upgrading should help. We also recommend an 29870 upgrade if you're an exit relay. 29871 29872 o Major bugfixes: 29873 - Work around a security feature in OpenSSL 0.9.8l that prevents our 29874 handshake from working unless we explicitly tell OpenSSL that we 29875 are using SSL renegotiation safely. We are, of course, but OpenSSL 29876 0.9.8l won't work unless we say we are. 29877 - Avoid crashing if the client is trying to upload many bytes and the 29878 circuit gets torn down at the same time, or if the flip side 29879 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150. 29880 29881 o Minor bugfixes: 29882 - Do not refuse to learn about authority certs and v2 networkstatus 29883 documents that are older than the latest consensus. This bug might 29884 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha. 29885 Spotted and fixed by xmux. 29886 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to- 29887 trigger platform-specific option misparsing case found by Coverity 29888 Scan. 29889 - Fix a compilation warning on Fedora 12 by removing an impossible-to- 29890 trigger assert. Fixes bug 1173. 29891 29892 29893Changes in version 0.2.2.6-alpha - 2009-11-19 29894 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features: 29895 support for the new lower-footprint "microdescriptor" directory design, 29896 future-proofing our consensus format against new hash functions or 29897 other changes, and an Android port. It also makes Tor compatible with 29898 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs. 29899 29900 o Major features: 29901 - Directory authorities can now create, vote on, and serve multiple 29902 parallel formats of directory data as part of their voting process. 29903 Partially implements Proposal 162: "Publish the consensus in 29904 multiple flavors". 29905 - Directory authorities can now agree on and publish small summaries 29906 of router information that clients can use in place of regular 29907 server descriptors. This transition will eventually allow clients 29908 to use far less bandwidth for downloading information about the 29909 network. Begins the implementation of Proposal 158: "Clients 29910 download consensus + microdescriptors". 29911 - The directory voting system is now extensible to use multiple hash 29912 algorithms for signatures and resource selection. Newer formats 29913 are signed with SHA256, with a possibility for moving to a better 29914 hash algorithm in the future. 29915 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all 29916 current and future memory pages via mlockall(). On supported 29917 platforms (modern Linux and probably BSD but not Windows or OS X), 29918 this should effectively disable any and all attempts to page out 29919 memory. This option requires that you start your Tor as root -- 29920 if you use DisableAllSwap, please consider using the User option 29921 to properly reduce the privileges of your Tor. 29922 - Numerous changes, bugfixes, and workarounds from Nathan Freitas 29923 to help Tor build correctly for Android phones. 29924 29925 o Major bugfixes: 29926 - Work around a security feature in OpenSSL 0.9.8l that prevents our 29927 handshake from working unless we explicitly tell OpenSSL that we 29928 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l 29929 won't work unless we say we are. 29930 29931 o Minor bugfixes: 29932 - Fix a crash bug when trying to initialize the evdns module in 29933 Libevent 2. Bugfix on 0.2.1.16-rc. 29934 - Stop logging at severity 'warn' when some other Tor client tries 29935 to establish a circuit with us using weak DH keys. It's a protocol 29936 violation, but that doesn't mean ordinary users need to hear about 29937 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13. 29938 - Do not refuse to learn about authority certs and v2 networkstatus 29939 documents that are older than the latest consensus. This bug might 29940 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha. 29941 Spotted and fixed by xmux. 29942 - Fix numerous small code-flaws found by Coverity Scan Rung 3. 29943 - If all authorities restart at once right before a consensus vote, 29944 nobody will vote about "Running", and clients will get a consensus 29945 with no usable relays. Instead, authorities refuse to build a 29946 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066. 29947 - If your relay can't keep up with the number of incoming create 29948 cells, it would log one warning per failure into your logs. Limit 29949 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042. 29950 - Bridges now use "reject *:*" as their default exit policy. Bugfix 29951 on 0.2.0.3-alpha; fixes bug 1113. 29952 - Fix a memory leak on directory authorities during voting that was 29953 introduced in 0.2.2.1-alpha. Found via valgrind. 29954 29955 29956Changes in version 0.2.1.20 - 2009-10-15 29957 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden 29958 services at once, prepares for more performance improvements, and 29959 fixes a bunch of smaller bugs. 29960 29961 The Windows and OS X bundles also include a more recent Vidalia, 29962 and switch from Privoxy to Polipo. 29963 29964 The OS X installers are now drag and drop. It's best to un-install 29965 Tor/Vidalia and then install this new bundle, rather than upgrade. If 29966 you want to upgrade, you'll need to update the paths for Tor and Polipo 29967 in the Vidalia Settings window. 29968 29969 o Major bugfixes: 29970 - Send circuit or stream sendme cells when our window has decreased 29971 by 100 cells, not when it has decreased by 101 cells. Bug uncovered 29972 by Karsten when testing the "reduce circuit window" performance 29973 patch. Bugfix on the 54th commit on Tor -- from July 2002, 29974 before the release of Tor 0.0.0. This is the new winner of the 29975 oldest-bug prize. 29976 - Fix a remotely triggerable memory leak when a consensus document 29977 contains more than one signature from the same voter. Bugfix on 29978 0.2.0.3-alpha. 29979 - Avoid segfault in rare cases when finishing an introduction circuit 29980 as a client and finding out that we don't have an introduction key 29981 for it. Fixes bug 1073. Reported by Aaron Swartz. 29982 29983 o Major features: 29984 - Tor now reads the "circwindow" parameter out of the consensus, 29985 and uses that value for its circuit package window rather than the 29986 default of 1000 cells. Begins the implementation of proposal 168. 29987 29988 o New directory authorities: 29989 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory 29990 authority. 29991 - Move moria1 and tonga to alternate IP addresses. 29992 29993 o Minor bugfixes: 29994 - Fix a signed/unsigned compile warning in 0.2.1.19. 29995 - Fix possible segmentation fault on directory authorities. Bugfix on 29996 0.2.1.14-rc. 29997 - Fix an extremely rare infinite recursion bug that could occur if 29998 we tried to log a message after shutting down the log subsystem. 29999 Found by Matt Edman. Bugfix on 0.2.0.16-alpha. 30000 - Fix an obscure bug where hidden services on 64-bit big-endian 30001 systems might mis-read the timestamp in v3 introduce cells, and 30002 refuse to connect back to the client. Discovered by "rotor". 30003 Bugfix on 0.2.1.6-alpha. 30004 - We were triggering a CLOCK_SKEW controller status event whenever 30005 we connect via the v2 connection protocol to any relay that has 30006 a wrong clock. Instead, we should only inform the controller when 30007 it's a trusted authority that claims our clock is wrong. Bugfix 30008 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit. 30009 - We were telling the controller about CHECKING_REACHABILITY and 30010 REACHABILITY_FAILED status events whenever we launch a testing 30011 circuit or notice that one has failed. Instead, only tell the 30012 controller when we want to inform the user of overall success or 30013 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported 30014 by SwissTorExit. 30015 - Don't warn when we're using a circuit that ends with a node 30016 excluded in ExcludeExitNodes, but the circuit is not used to access 30017 the outside world. This should help fix bug 1090. Bugfix on 30018 0.2.1.6-alpha. 30019 - Work around a small memory leak in some versions of OpenSSL that 30020 stopped the memory used by the hostname TLS extension from being 30021 freed. 30022 30023 o Minor features: 30024 - Add a "getinfo status/accepted-server-descriptor" controller 30025 command, which is the recommended way for controllers to learn 30026 whether our server descriptor has been successfully received by at 30027 least on directory authority. Un-recommend good-server-descriptor 30028 getinfo and status events until we have a better design for them. 30029 30030 30031Changes in version 0.2.2.5-alpha - 2009-10-11 30032 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha. 30033 30034 o Major bugfixes: 30035 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha. 30036 30037 o Directory authorities: 30038 - Temporarily (just for this release) move dizum to an alternate 30039 IP address. 30040 30041 30042Changes in version 0.2.2.4-alpha - 2009-10-10 30043 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also 30044 introduces a new unit test framework, shifts directry authority 30045 addresses around to reduce the impact from recent blocking events, 30046 and fixes a few smaller bugs. 30047 30048 o Major bugfixes: 30049 - Fix several more asserts in the circuit_build_times code, for 30050 example one that causes Tor to fail to start once we have 30051 accumulated 5000 build times in the state file. Bugfixes on 30052 0.2.2.2-alpha; fixes bug 1108. 30053 30054 o New directory authorities: 30055 - Move moria1 and Tonga to alternate IP addresses. 30056 30057 o Minor features: 30058 - Log SSL state transitions at debug level during handshake, and 30059 include SSL states in error messages. This may help debug future 30060 SSL handshake issues. 30061 - Add a new "Handshake" log domain for activities that happen 30062 during the TLS handshake. 30063 - Revert to the "June 3 2009" ip-to-country file. The September one 30064 seems to have removed most US IP addresses. 30065 - Directory authorities now reject Tor relays with versions less than 30066 0.1.2.14. This step cuts out four relays from the current network, 30067 none of which are very big. 30068 30069 o Minor bugfixes: 30070 - Fix a couple of smaller issues with gathering statistics. Bugfixes 30071 on 0.2.2.1-alpha. 30072 - Fix two memory leaks in the error case of 30073 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha. 30074 - Don't count one-hop circuits when we're estimating how long it 30075 takes circuits to build on average. Otherwise we'll set our circuit 30076 build timeout lower than we should. Bugfix on 0.2.2.2-alpha. 30077 - Directory authorities no longer change their opinion of, or vote on, 30078 whether a router is Running, unless they have themselves been 30079 online long enough to have some idea. Bugfix on 0.2.0.6-alpha. 30080 Fixes bug 1023. 30081 30082 o Code simplifications and refactoring: 30083 - Revise our unit tests to use the "tinytest" framework, so we 30084 can run tests in their own processes, have smarter setup/teardown 30085 code, and so on. The unit test code has moved to its own 30086 subdirectory, and has been split into multiple modules. 30087 30088 30089Changes in version 0.2.2.3-alpha - 2009-09-23 30090 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha. 30091 30092 o Major bugfixes: 30093 - Fix an overzealous assert in our new circuit build timeout code. 30094 Bugfix on 0.2.2.2-alpha; fixes bug 1103. 30095 30096 o Minor bugfixes: 30097 - If the networkstatus consensus tells us that we should use a 30098 negative circuit package window, ignore it. Otherwise we'll 30099 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha. 30100 30101 30102Changes in version 0.2.2.2-alpha - 2009-09-21 30103 Tor 0.2.2.2-alpha introduces our latest performance improvement for 30104 clients: Tor tracks the average time it takes to build a circuit, and 30105 avoids using circuits that take too long to build. For fast connections, 30106 this feature can cut your expected latency in half. For slow or flaky 30107 connections, it could ruin your Tor experience. Let us know if it does! 30108 30109 o Major features: 30110 - Tor now tracks how long it takes to build client-side circuits 30111 over time, and adapts its timeout to local network performance. 30112 Since a circuit that takes a long time to build will also provide 30113 bad performance, we get significant latency improvements by 30114 discarding the slowest 20% of circuits. Specifically, Tor creates 30115 circuits more aggressively than usual until it has enough data 30116 points for a good timeout estimate. Implements proposal 151. 30117 We are especially looking for reports (good and bad) from users with 30118 both EDGE and broadband connections that can move from broadband 30119 to EDGE and find out if the build-time data in the .tor/state gets 30120 reset without loss of Tor usability. You should also see a notice 30121 log message telling you that Tor has reset its timeout. 30122 - Directory authorities can now vote on arbitrary integer values as 30123 part of the consensus process. This is designed to help set 30124 network-wide parameters. Implements proposal 167. 30125 - Tor now reads the "circwindow" parameter out of the consensus, 30126 and uses that value for its circuit package window rather than the 30127 default of 1000 cells. Begins the implementation of proposal 168. 30128 30129 o Major bugfixes: 30130 - Fix a remotely triggerable memory leak when a consensus document 30131 contains more than one signature from the same voter. Bugfix on 30132 0.2.0.3-alpha. 30133 30134 o Minor bugfixes: 30135 - Fix an extremely rare infinite recursion bug that could occur if 30136 we tried to log a message after shutting down the log subsystem. 30137 Found by Matt Edman. Bugfix on 0.2.0.16-alpha. 30138 - Fix parsing for memory or time units given without a space between 30139 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076. 30140 - A networkstatus vote must contain exactly one signature. Spec 30141 conformance issue. Bugfix on 0.2.0.3-alpha. 30142 - Fix an obscure bug where hidden services on 64-bit big-endian 30143 systems might mis-read the timestamp in v3 introduce cells, and 30144 refuse to connect back to the client. Discovered by "rotor". 30145 Bugfix on 0.2.1.6-alpha. 30146 - We were triggering a CLOCK_SKEW controller status event whenever 30147 we connect via the v2 connection protocol to any relay that has 30148 a wrong clock. Instead, we should only inform the controller when 30149 it's a trusted authority that claims our clock is wrong. Bugfix 30150 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit. 30151 - We were telling the controller about CHECKING_REACHABILITY and 30152 REACHABILITY_FAILED status events whenever we launch a testing 30153 circuit or notice that one has failed. Instead, only tell the 30154 controller when we want to inform the user of overall success or 30155 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported 30156 by SwissTorExit. 30157 - Don't warn when we're using a circuit that ends with a node 30158 excluded in ExcludeExitNodes, but the circuit is not used to access 30159 the outside world. This should help fix bug 1090, but more problems 30160 remain. Bugfix on 0.2.1.6-alpha. 30161 - Work around a small memory leak in some versions of OpenSSL that 30162 stopped the memory used by the hostname TLS extension from being 30163 freed. 30164 - Make our 'torify' script more portable; if we have only one of 30165 'torsocks' or 'tsocks' installed, don't complain to the user; 30166 and explain our warning about tsocks better. 30167 30168 o Minor features: 30169 - Add a "getinfo status/accepted-server-descriptor" controller 30170 command, which is the recommended way for controllers to learn 30171 whether our server descriptor has been successfully received by at 30172 least on directory authority. Un-recommend good-server-descriptor 30173 getinfo and status events until we have a better design for them. 30174 - Update to the "September 4 2009" ip-to-country file. 30175 30176 30177Changes in version 0.2.2.1-alpha - 2009-08-26 30178 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows 30179 Tor clients to bootstrap on networks where only port 80 is reachable, 30180 makes it more straightforward to support hardware crypto accelerators, 30181 and starts the groundwork for gathering stats safely at relays. 30182 30183 o Security fixes: 30184 - Start the process of disabling ".exit" address notation, since it 30185 can be used for a variety of esoteric application-level attacks 30186 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix 30187 on 0.0.9rc5. 30188 30189 o New directory authorities: 30190 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory 30191 authority. 30192 30193 o Major features: 30194 - New AccelName and AccelDir options add support for dynamic OpenSSL 30195 hardware crypto acceleration engines. 30196 - Tor now supports tunneling all of its outgoing connections over 30197 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy 30198 configuration options. Code by Christopher Davis. 30199 30200 o Major bugfixes: 30201 - Send circuit or stream sendme cells when our window has decreased 30202 by 100 cells, not when it has decreased by 101 cells. Bug uncovered 30203 by Karsten when testing the "reduce circuit window" performance 30204 patch. Bugfix on the 54th commit on Tor -- from July 2002, 30205 before the release of Tor 0.0.0. This is the new winner of the 30206 oldest-bug prize. 30207 30208 o New options for gathering stats safely: 30209 - Directory mirrors that set "DirReqStatistics 1" write statistics 30210 about directory requests to disk every 24 hours. As compared to the 30211 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements: 30212 1) stats are written to disk exactly every 24 hours; 2) estimated 30213 shares of v2 and v3 requests are determined as mean values, not at 30214 the end of a measurement period; 3) unresolved requests are listed 30215 with country code '??'; 4) directories also measure download times. 30216 - Exit nodes that set "ExitPortStatistics 1" write statistics on the 30217 number of exit streams and transferred bytes per port to disk every 30218 24 hours. 30219 - Relays that set "CellStatistics 1" write statistics on how long 30220 cells spend in their circuit queues to disk every 24 hours. 30221 - Entry nodes that set "EntryStatistics 1" write statistics on the 30222 rough number and origins of connecting clients to disk every 24 30223 hours. 30224 - Relays that write any of the above statistics to disk and set 30225 "ExtraInfoStatistics 1" include the past 24 hours of statistics in 30226 their extra-info documents. 30227 30228 o Minor features: 30229 - New --digests command-line switch to output the digests of the 30230 source files Tor was built with. 30231 - The "torify" script now uses torsocks where available. 30232 - The memarea code now uses a sentinel value at the end of each area 30233 to make sure nothing writes beyond the end of an area. This might 30234 help debug some conceivable causes of bug 930. 30235 - Time and memory units in the configuration file can now be set to 30236 fractional units. For example, "2.5 GB" is now a valid value for 30237 AccountingMax. 30238 - Certain Tor clients (such as those behind check.torproject.org) may 30239 want to fetch the consensus in an extra early manner. To enable this 30240 a user may now set FetchDirInfoExtraEarly to 1. This also depends on 30241 setting FetchDirInfoEarly to 1. Previous behavior will stay the same 30242 as only certain clients who must have this information sooner should 30243 set this option. 30244 - Instead of adding the svn revision to the Tor version string, report 30245 the git commit (when we're building from a git checkout). 30246 30247 o Minor bugfixes: 30248 - If any of the v3 certs we download are unparseable, we should 30249 actually notice the failure so we don't retry indefinitely. Bugfix 30250 on 0.2.0.x; reported by "rotator". 30251 - If the cached cert file is unparseable, warn but don't exit. 30252 - Fix possible segmentation fault on directory authorities. Bugfix on 30253 0.2.1.14-rc. 30254 - When Tor fails to parse a descriptor of any kind, dump it to disk. 30255 Might help diagnosing bug 1051. 30256 30257 o Deprecated and removed features: 30258 - The controller no longer accepts the old obsolete "addr-mappings/" 30259 or "unregistered-servers-" GETINFO values. 30260 - Hidden services no longer publish version 0 descriptors, and clients 30261 do not request or use version 0 descriptors. However, the old hidden 30262 service authorities still accept and serve version 0 descriptors 30263 when contacted by older hidden services/clients. 30264 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now 30265 always on; using them is necessary for correct forward-compatible 30266 controllers. 30267 - Remove support for .noconnect style addresses. Nobody was using 30268 them, and they provided another avenue for detecting Tor users 30269 via application-level web tricks. 30270 30271 o Packaging changes: 30272 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X 30273 installer bundles. See 30274 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG 30275 for details of what's new in Vidalia 0.2.3. 30276 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta. 30277 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific 30278 configuration file, rather than the old Privoxy. 30279 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as 30280 x86-only for better compatibility with OS X 10.6, aka Snow Leopard. 30281 - OS X Tor Expert Bundle: Tor is compiled as x86-only for 30282 better compatibility with OS X 10.6, aka Snow Leopard. 30283 - OS X Vidalia Bundle: The multi-package installer is now replaced 30284 by a simple drag and drop to the /Applications folder. This change 30285 occurred with the upgrade to Vidalia 0.2.3. 30286 30287 30288Changes in version 0.2.1.19 - 2009-07-28 30289 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden 30290 services on Tor 0.2.1.3-alpha through 0.2.1.18. 30291 30292 o Major bugfixes: 30293 - Make accessing hidden services on 0.2.1.x work right again. 30294 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and 30295 part of patch provided by "optimist". 30296 30297 o Minor features: 30298 - When a relay/bridge is writing out its identity key fingerprint to 30299 the "fingerprint" file and to its logs, write it without spaces. Now 30300 it will look like the fingerprints in our bridges documentation, 30301 and confuse fewer users. 30302 30303 o Minor bugfixes: 30304 - Relays no longer publish a new server descriptor if they change 30305 their MaxAdvertisedBandwidth config option but it doesn't end up 30306 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc; 30307 fixes bug 1026. Patch from Sebastian. 30308 - Avoid leaking memory every time we get a create cell but we have 30309 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha; 30310 fixes bug 1034. Reported by BarkerJr. 30311 30312 30313Changes in version 0.2.1.18 - 2009-07-24 30314 Tor 0.2.1.18 lays the foundations for performance improvements, 30315 adds status events to help users diagnose bootstrap problems, adds 30316 optional authentication/authorization for hidden services, fixes a 30317 variety of potential anonymity problems, and includes a huge pile of 30318 other features and bug fixes. 30319 30320 o Build fixes: 30321 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent. 30322 30323 30324Changes in version 0.2.1.17-rc - 2009-07-07 30325 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release 30326 candidate for the 0.2.1.x series. It lays the groundwork for further 30327 client performance improvements, and also fixes a big bug with directory 30328 authorities that were causing them to assign Guard and Stable flags 30329 poorly. 30330 30331 The Windows bundles also finally include the geoip database that we 30332 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles 30333 should actually install Torbutton rather than giving you a cryptic 30334 failure message (oops). 30335 30336 o Major features: 30337 - Clients now use the bandwidth values in the consensus, rather than 30338 the bandwidth values in each relay descriptor. This approach opens 30339 the door to more accurate bandwidth estimates once the directory 30340 authorities start doing active measurements. Implements more of 30341 proposal 141. 30342 30343 o Major bugfixes: 30344 - When Tor clients restart after 1-5 days, they discard all their 30345 cached descriptors as too old, but they still use the cached 30346 consensus document. This approach is good for robustness, but 30347 bad for performance: since they don't know any bandwidths, they 30348 end up choosing at random rather than weighting their choice by 30349 speed. Fixed by the above feature of putting bandwidths in the 30350 consensus. Bugfix on 0.2.0.x. 30351 - Directory authorities were neglecting to mark relays down in their 30352 internal histories if the relays fall off the routerlist without 30353 ever being found unreachable. So there were relays in the histories 30354 that haven't been seen for eight months, and are listed as being 30355 up for eight months. This wreaked havoc on the "median wfu" 30356 and "median mtbf" calculations, in turn making Guard and Stable 30357 flags very wrong, hurting network performance. Fixes bugs 696 and 30358 969. Bugfix on 0.2.0.6-alpha. 30359 30360 o Minor bugfixes: 30361 - Serve the DirPortFrontPage page even when we have been approaching 30362 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha. 30363 - The control port would close the connection before flushing long 30364 replies, such as the network consensus, if a QUIT command was issued 30365 before the reply had completed. Now, the control port flushes all 30366 pending replies before closing the connection. Also fixed a spurious 30367 warning when a QUIT command is issued after a malformed or rejected 30368 AUTHENTICATE command, but before the connection was closed. Patch 30369 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016. 30370 - When we can't find an intro key for a v2 hidden service descriptor, 30371 fall back to the v0 hidden service descriptor and log a bug message. 30372 Workaround for bug 1024. 30373 - Fix a log message that did not respect the SafeLogging option. 30374 Resolves bug 1027. 30375 30376 o Minor features: 30377 - If we're a relay and we change our IP address, be more verbose 30378 about the reason that made us change. Should help track down 30379 further bugs for relays on dynamic IP addresses. 30380 30381 30382Changes in version 0.2.0.35 - 2009-06-24 30383 o Security fix: 30384 - Avoid crashing in the presence of certain malformed descriptors. 30385 Found by lark, and by automated fuzzing. 30386 - Fix an edge case where a malicious exit relay could convince a 30387 controller that the client's DNS question resolves to an internal IP 30388 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta. 30389 30390 o Major bugfixes: 30391 - Finally fix the bug where dynamic-IP relays disappear when their 30392 IP address changes: directory mirrors were mistakenly telling 30393 them their old address if they asked via begin_dir, so they 30394 never got an accurate answer about their new address, so they 30395 just vanished after a day. For belt-and-suspenders, relays that 30396 don't set Address in their config now avoid using begin_dir for 30397 all direct connections. Should fix bugs 827, 883, and 900. 30398 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug 30399 that would occur on some exit nodes when DNS failures and timeouts 30400 occurred in certain patterns. Fix for bug 957. 30401 30402 o Minor bugfixes: 30403 - When starting with a cache over a few days old, do not leak 30404 memory for the obsolete router descriptors in it. Bugfix on 30405 0.2.0.33; fixes bug 672. 30406 - Hidden service clients didn't use a cached service descriptor that 30407 was older than 15 minutes, but wouldn't fetch a new one either, 30408 because there was already one in the cache. Now, fetch a v2 30409 descriptor unless the same descriptor was added to the cache within 30410 the last 15 minutes. Fixes bug 997; reported by Marcus Griep. 30411 30412 30413Changes in version 0.2.1.16-rc - 2009-06-20 30414 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes 30415 a bunch of minor bugs. 30416 30417 o Security fixes: 30418 - Fix an edge case where a malicious exit relay could convince a 30419 controller that the client's DNS question resolves to an internal IP 30420 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta. 30421 30422 o Major performance improvements (on 0.2.0.x): 30423 - Disable and refactor some debugging checks that forced a linear scan 30424 over the whole server-side DNS cache. These accounted for over 50% 30425 of CPU time on a relatively busy exit node's gprof profile. Found 30426 by Jacob. 30427 - Disable some debugging checks that appeared in exit node profile 30428 data. 30429 30430 o Minor features: 30431 - Update to the "June 3 2009" ip-to-country file. 30432 - Do not have tor-resolve automatically refuse all .onion addresses; 30433 if AutomapHostsOnResolve is set in your torrc, this will work fine. 30434 30435 o Minor bugfixes (on 0.2.0.x): 30436 - Log correct error messages for DNS-related network errors on 30437 Windows. 30438 - Fix a race condition that could cause crashes or memory corruption 30439 when running as a server with a controller listening for log 30440 messages. 30441 - Avoid crashing when we have a policy specified in a DirPolicy or 30442 SocksPolicy or ReachableAddresses option with ports set on it, 30443 and we re-load the policy. May fix bug 996. 30444 - Hidden service clients didn't use a cached service descriptor that 30445 was older than 15 minutes, but wouldn't fetch a new one either, 30446 because there was already one in the cache. Now, fetch a v2 30447 descriptor unless the same descriptor was added to the cache within 30448 the last 15 minutes. Fixes bug 997; reported by Marcus Griep. 30449 30450 o Minor bugfixes (on 0.2.1.x): 30451 - Don't warn users about low port and hibernation mix when they 30452 provide a *ListenAddress directive to fix that. Bugfix on 30453 0.2.1.15-rc. 30454 - When switching back and forth between bridge mode, do not start 30455 gathering GeoIP data until two hours have passed. 30456 - Do not complain that the user has requested an excluded node as 30457 an exit when the node is not really an exit. This could happen 30458 because the circuit was for testing, or an introduction point. 30459 Fix for bug 984. 30460 30461 30462Changes in version 0.2.1.15-rc - 2009-05-25 30463 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x 30464 series. It fixes a major bug on fast exit relays, as well as a variety 30465 of more minor bugs. 30466 30467 o Major bugfixes (on 0.2.0.x): 30468 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug 30469 that would occur on some exit nodes when DNS failures and timeouts 30470 occurred in certain patterns. Fix for bug 957. 30471 30472 o Minor bugfixes (on 0.2.0.x): 30473 - Actually return -1 in the error case for read_bandwidth_usage(). 30474 Harmless bug, since we currently don't care about the return value 30475 anywhere. Bugfix on 0.2.0.9-alpha. 30476 - Provide a more useful log message if bug 977 (related to buffer 30477 freelists) ever reappears, and do not crash right away. 30478 - Fix an assertion failure on 64-bit platforms when we allocated 30479 memory right up to the end of a memarea, then realigned the memory 30480 one step beyond the end. Fixes a possible cause of bug 930. 30481 - Protect the count of open sockets with a mutex, so we can't 30482 corrupt it when two threads are closing or opening sockets at once. 30483 Fix for bug 939. Bugfix on 0.2.0.1-alpha. 30484 - Don't allow a bridge to publish its router descriptor to a 30485 non-bridge directory authority. Fixes part of bug 932. 30486 - When we change to or from being a bridge, reset our counts of 30487 client usage by country. Fixes bug 932. 30488 - Fix a bug that made stream bandwidth get misreported to the 30489 controller. 30490 - Stop using malloc_usable_size() to use more area than we had 30491 actually allocated: it was safe, but made valgrind really unhappy. 30492 - Fix a memory leak when v3 directory authorities load their keys 30493 and cert from disk. Bugfix on 0.2.0.1-alpha. 30494 30495 o Minor bugfixes (on 0.2.1.x): 30496 - Fix use of freed memory when deciding to mark a non-addable 30497 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha. 30498 30499 30500Changes in version 0.2.1.14-rc - 2009-04-12 30501 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x 30502 series. It begins fixing some major performance problems, and also 30503 finally addresses the bug that was causing relays on dynamic IP 30504 addresses to fall out of the directory. 30505 30506 o Major features: 30507 - Clients replace entry guards that were chosen more than a few months 30508 ago. This change should significantly improve client performance, 30509 especially once more people upgrade, since relays that have been 30510 a guard for a long time are currently overloaded. 30511 30512 o Major bugfixes (on 0.2.0): 30513 - Finally fix the bug where dynamic-IP relays disappear when their 30514 IP address changes: directory mirrors were mistakenly telling 30515 them their old address if they asked via begin_dir, so they 30516 never got an accurate answer about their new address, so they 30517 just vanished after a day. For belt-and-suspenders, relays that 30518 don't set Address in their config now avoid using begin_dir for 30519 all direct connections. Should fix bugs 827, 883, and 900. 30520 - Relays were falling out of the networkstatus consensus for 30521 part of a day if they changed their local config but the 30522 authorities discarded their new descriptor as "not sufficiently 30523 different". Now directory authorities accept a descriptor as changed 30524 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962; 30525 patch by Sebastian. 30526 - Avoid crashing in the presence of certain malformed descriptors. 30527 Found by lark, and by automated fuzzing. 30528 30529 o Minor features: 30530 - When generating circuit events with verbose nicknames for 30531 controllers, try harder to look up nicknames for routers on a 30532 circuit. (Previously, we would look in the router descriptors we had 30533 for nicknames, but not in the consensus.) Partial fix for bug 941. 30534 - If the bridge config line doesn't specify a port, assume 443. 30535 This makes bridge lines a bit smaller and easier for users to 30536 understand. 30537 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480 30538 bytes (aka 20KB/s), to match our documentation. Also update 30539 directory authorities so they always assign the Fast flag to relays 30540 with 20KB/s of capacity. Now people running relays won't suddenly 30541 find themselves not seeing any use, if the network gets faster 30542 on average. 30543 - Update to the "April 3 2009" ip-to-country file. 30544 30545 o Minor bugfixes: 30546 - Avoid trying to print raw memory to the logs when we decide to 30547 give up on downloading a given relay descriptor. Bugfix on 30548 0.2.1.9-alpha. 30549 - In tor-resolve, when the Tor client to use is specified by 30550 <hostname>:<port>, actually use the specified port rather than 30551 defaulting to 9050. Bugfix on 0.2.1.6-alpha. 30552 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha. 30553 - When starting with a cache over a few days old, do not leak 30554 memory for the obsolete router descriptors in it. Bugfix on 30555 0.2.0.33. 30556 - Avoid double-free on list of successfully uploaded hidden 30557 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha. 30558 - Change memarea_strndup() implementation to work even when 30559 duplicating a string at the end of a page. This bug was 30560 harmless for now, but could have meant crashes later. Fix by 30561 lark. Bugfix on 0.2.1.1-alpha. 30562 - Limit uploaded directory documents to be 16M rather than 500K. 30563 The directory authorities were refusing v3 consensus votes from 30564 other authorities, since the votes are now 504K. Fixes bug 959; 30565 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;). 30566 - Directory authorities should never send a 503 "busy" response to 30567 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by 30568 bug 959. 30569 30570 30571Changes in version 0.2.1.13-alpha - 2009-03-09 30572 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and 30573 cleanups. We're finally getting close to a release candidate. 30574 30575 o Major bugfixes: 30576 - Correctly update the list of which countries we exclude as 30577 exits, when the GeoIP file is loaded or reloaded. Diagnosed by 30578 lark. Bugfix on 0.2.1.6-alpha. 30579 30580 o Minor bugfixes (on 0.2.0.x and earlier): 30581 - Automatically detect MacOSX versions earlier than 10.4.0, and 30582 disable kqueue from inside Tor when running with these versions. 30583 We previously did this from the startup script, but that was no 30584 help to people who didn't use the startup script. Resolves bug 863. 30585 - When we had picked an exit node for a connection, but marked it as 30586 "optional", and it turned out we had no onion key for the exit, 30587 stop wanting that exit and try again. This situation may not 30588 be possible now, but will probably become feasible with proposal 30589 158. Spotted by rovv. Fixes another case of bug 752. 30590 - Clients no longer cache certificates for authorities they do not 30591 recognize. Bugfix on 0.2.0.9-alpha. 30592 - When we can't transmit a DNS request due to a network error, retry 30593 it after a while, and eventually transmit a failing response to 30594 the RESOLVED cell. Bugfix on 0.1.2.5-alpha. 30595 - If the controller claimed responsibility for a stream, but that 30596 stream never finished making its connection, it would live 30597 forever in circuit_wait state. Now we close it after SocksTimeout 30598 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry. 30599 - Drop begin cells to a hidden service if they come from the middle 30600 of a circuit. Patch from lark. 30601 - When we erroneously receive two EXTEND cells for the same circuit 30602 ID on the same connection, drop the second. Patch from lark. 30603 - Fix a crash that occurs on exit nodes when a nameserver request 30604 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had 30605 been suppressing the bug since 0.1.2.10-alpha. Partial fix for 30606 bug 929. 30607 - Do not assume that a stack-allocated character array will be 30608 64-bit aligned on platforms that demand that uint64_t access is 30609 aligned. Possible fix for bug 604. 30610 - Parse dates and IPv4 addresses in a locale- and libc-independent 30611 manner, to avoid platform-dependent behavior on malformed input. 30612 - Build correctly when configured to build outside the main source 30613 path. Patch from Michael Gold. 30614 - We were already rejecting relay begin cells with destination port 30615 of 0. Now also reject extend cells with destination port or address 30616 of 0. Suggested by lark. 30617 30618 o Minor bugfixes (on 0.2.1.x): 30619 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY 30620 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878. 30621 - If we're an exit node, scrub the IP address to which we are exiting 30622 in the logs. Bugfix on 0.2.1.8-alpha. 30623 30624 o Minor features: 30625 - On Linux, use the prctl call to re-enable core dumps when the user 30626 is option is set. 30627 - New controller event NEWCONSENSUS that lists the networkstatus 30628 lines for every recommended relay. Now controllers like Torflow 30629 can keep up-to-date on which relays they should be using. 30630 - Update to the "February 26 2009" ip-to-country file. 30631 30632 30633Changes in version 0.2.0.34 - 2009-02-08 30634 Tor 0.2.0.34 features several more security-related fixes. You should 30635 upgrade, especially if you run an exit relay (remote crash) or a 30636 directory authority (remote infinite loop), or you're on an older 30637 (pre-XP) or not-recently-patched Windows (remote exploit). 30638 30639 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions 30640 have many known flaws, and nobody should be using them. You should 30641 upgrade. If you're using a Linux or BSD and its packages are obsolete, 30642 stop using those packages and upgrade anyway. 30643 30644 o Security fixes: 30645 - Fix an infinite-loop bug on handling corrupt votes under certain 30646 circumstances. Bugfix on 0.2.0.8-alpha. 30647 - Fix a temporary DoS vulnerability that could be performed by 30648 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark. 30649 - Avoid a potential crash on exit nodes when processing malformed 30650 input. Remote DoS opportunity. Bugfix on 0.2.0.33. 30651 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid. 30652 Spec conformance issue. Bugfix on Tor 0.0.2pre27. 30653 30654 o Minor bugfixes: 30655 - Fix compilation on systems where time_t is a 64-bit integer. 30656 Patch from Matthias Drochner. 30657 - Don't consider expiring already-closed client connections. Fixes 30658 bug 893. Bugfix on 0.0.2pre20. 30659 30660 30661Changes in version 0.2.1.12-alpha - 2009-02-08 30662 Tor 0.2.1.12-alpha features several more security-related fixes. You 30663 should upgrade, especially if you run an exit relay (remote crash) or 30664 a directory authority (remote infinite loop), or you're on an older 30665 (pre-XP) or not-recently-patched Windows (remote exploit). It also 30666 includes a big pile of minor bugfixes and cleanups. 30667 30668 o Security fixes: 30669 - Fix an infinite-loop bug on handling corrupt votes under certain 30670 circumstances. Bugfix on 0.2.0.8-alpha. 30671 - Fix a temporary DoS vulnerability that could be performed by 30672 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark. 30673 - Avoid a potential crash on exit nodes when processing malformed 30674 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha. 30675 30676 o Minor bugfixes: 30677 - Let controllers actually ask for the "clients_seen" event for 30678 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha; 30679 reported by Matt Edman. 30680 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against 30681 0.2.1.11-alpha. 30682 - Fix a bug in address parsing that was preventing bridges or hidden 30683 service targets from being at IPv6 addresses. 30684 - Solve a bug that kept hardware crypto acceleration from getting 30685 enabled when accounting was turned on. Fixes bug 907. Bugfix on 30686 0.0.9pre6. 30687 - Remove a bash-ism from configure.in to build properly on non-Linux 30688 platforms. Bugfix on 0.2.1.1-alpha. 30689 - Fix code so authorities _actually_ send back X-Descriptor-Not-New 30690 headers. Bugfix on 0.2.0.10-alpha. 30691 - Don't consider expiring already-closed client connections. Fixes 30692 bug 893. Bugfix on 0.0.2pre20. 30693 - Fix another interesting corner-case of bug 891 spotted by rovv: 30694 Previously, if two hosts had different amounts of clock drift, and 30695 one of them created a new connection with just the wrong timing, 30696 the other might decide to deprecate the new connection erroneously. 30697 Bugfix on 0.1.1.13-alpha. 30698 - Resolve a very rare crash bug that could occur when the user forced 30699 a nameserver reconfiguration during the middle of a nameserver 30700 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha. 30701 - Support changing value of ServerDNSRandomizeCase during SIGHUP. 30702 Bugfix on 0.2.1.7-alpha. 30703 - If we're using bridges and our network goes away, be more willing 30704 to forgive our bridges and try again when we get an application 30705 request. Bugfix on 0.2.0.x. 30706 30707 o Minor features: 30708 - Support platforms where time_t is 64 bits long. (Congratulations, 30709 NetBSD!) Patch from Matthias Drochner. 30710 - Add a 'getinfo status/clients-seen' controller command, in case 30711 controllers want to hear clients_seen events but connect late. 30712 30713 o Build changes: 30714 - Disable GCC's strict alias optimization by default, to avoid the 30715 likelihood of its introducing subtle bugs whenever our code violates 30716 the letter of C99's alias rules. 30717 30718 30719Changes in version 0.2.0.33 - 2009-01-21 30720 Tor 0.2.0.33 fixes a variety of bugs that were making relays less 30721 useful to users. It also finally fixes a bug where a relay or client 30722 that's been off for many days would take a long time to bootstrap. 30723 30724 This update also fixes an important security-related bug reported by 30725 Ilja van Sprundel. You should upgrade. (We'll send out more details 30726 about the bug once people have had some time to upgrade.) 30727 30728 o Security fixes: 30729 - Fix a heap-corruption bug that may be remotely triggerable on 30730 some platforms. Reported by Ilja van Sprundel. 30731 30732 o Major bugfixes: 30733 - When a stream at an exit relay is in state "resolving" or 30734 "connecting" and it receives an "end" relay cell, the exit relay 30735 would silently ignore the end cell and not close the stream. If 30736 the client never closes the circuit, then the exit relay never 30737 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha; 30738 reported by "wood". 30739 - When sending CREATED cells back for a given circuit, use a 64-bit 30740 connection ID to find the right connection, rather than an addr:port 30741 combination. Now that we can have multiple OR connections between 30742 the same ORs, it is no longer possible to use addr:port to uniquely 30743 identify a connection. 30744 - Bridge relays that had DirPort set to 0 would stop fetching 30745 descriptors shortly after startup, and then briefly resume 30746 after a new bandwidth test and/or after publishing a new bridge 30747 descriptor. Bridge users that try to bootstrap from them would 30748 get a recent networkstatus but would get descriptors from up to 30749 18 hours earlier, meaning most of the descriptors were obsolete 30750 already. Reported by Tas; bugfix on 0.2.0.13-alpha. 30751 - Prevent bridge relays from serving their 'extrainfo' document 30752 to anybody who asks, now that extrainfo docs include potentially 30753 sensitive aggregated client geoip summaries. Bugfix on 30754 0.2.0.13-alpha. 30755 - If the cached networkstatus consensus is more than five days old, 30756 discard it rather than trying to use it. In theory it could be 30757 useful because it lists alternate directory mirrors, but in practice 30758 it just means we spend many minutes trying directory mirrors that 30759 are long gone from the network. Also discard router descriptors as 30760 we load them if they are more than five days old, since the onion 30761 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887. 30762 30763 o Minor bugfixes: 30764 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug 30765 could make gcc generate non-functional binary search code. Bugfix 30766 on 0.2.0.10-alpha. 30767 - Build correctly on platforms without socklen_t. 30768 - Compile without warnings on solaris. 30769 - Avoid potential crash on internal error during signature collection. 30770 Fixes bug 864. Patch from rovv. 30771 - Correct handling of possible malformed authority signing key 30772 certificates with internal signature types. Fixes bug 880. 30773 Bugfix on 0.2.0.3-alpha. 30774 - Fix a hard-to-trigger resource leak when logging credential status. 30775 CID 349. 30776 - When we can't initialize DNS because the network is down, do not 30777 automatically stop Tor from starting. Instead, we retry failed 30778 dns_init() every 10 minutes, and change the exit policy to reject 30779 *:* until one succeeds. Fixes bug 691. 30780 - Use 64 bits instead of 32 bits for connection identifiers used with 30781 the controller protocol, to greatly reduce risk of identifier reuse. 30782 - When we're choosing an exit node for a circuit, and we have 30783 no pending streams, choose a good general exit rather than one that 30784 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv. 30785 - Fix another case of assuming, when a specific exit is requested, 30786 that we know more than the user about what hosts it allows. 30787 Fixes one case of bug 752. Patch from rovv. 30788 - Clip the MaxCircuitDirtiness config option to a minimum of 10 30789 seconds. Warn the user if lower values are given in the 30790 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian. 30791 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the 30792 user if lower values are given in the configuration. Bugfix on 30793 0.1.1.17-rc. Patch by Sebastian. 30794 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to 30795 the cache because we already had a v0 descriptor with the same ID. 30796 Bugfix on 0.2.0.18-alpha. 30797 - Fix a race condition when freeing keys shared between main thread 30798 and CPU workers that could result in a memory leak. Bugfix on 30799 0.1.0.1-rc. Fixes bug 889. 30800 - Send a valid END cell back when a client tries to connect to a 30801 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug 30802 840. Patch from rovv. 30803 - Check which hops rendezvous stream cells are associated with to 30804 prevent possible guess-the-streamid injection attacks from 30805 intermediate hops. Fixes another case of bug 446. Based on patch 30806 from rovv. 30807 - If a broken client asks a non-exit router to connect somewhere, 30808 do not even do the DNS lookup before rejecting the connection. 30809 Fixes another case of bug 619. Patch from rovv. 30810 - When a relay gets a create cell it can't decrypt (e.g. because it's 30811 using the wrong onion key), we were dropping it and letting the 30812 client time out. Now actually answer with a destroy cell. Fixes 30813 bug 904. Bugfix on 0.0.2pre8. 30814 30815 o Minor bugfixes (hidden services): 30816 - Do not throw away existing introduction points on SIGHUP. Bugfix on 30817 0.0.6pre1. Patch by Karsten. Fixes bug 874. 30818 30819 o Minor features: 30820 - Report the case where all signatures in a detached set are rejected 30821 differently than the case where there is an error handling the 30822 detached set. 30823 - When we realize that another process has modified our cached 30824 descriptors, print out a more useful error message rather than 30825 triggering an assertion. Fixes bug 885. Patch from Karsten. 30826 - Implement the 0x20 hack to better resist DNS poisoning: set the 30827 case on outgoing DNS requests randomly, and reject responses that do 30828 not match the case correctly. This logic can be disabled with the 30829 ServerDNSRandomizeCase setting, if you are using one of the 0.3% 30830 of servers that do not reliably preserve case in replies. See 30831 "Increased DNS Forgery Resistance through 0x20-Bit Encoding" 30832 for more info. 30833 - Check DNS replies for more matching fields to better resist DNS 30834 poisoning. 30835 - Never use OpenSSL compression: it wastes RAM and CPU trying to 30836 compress cells, which are basically all encrypted, compressed, or 30837 both. 30838 30839 30840Changes in version 0.2.1.11-alpha - 2009-01-20 30841 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a 30842 week it will take a long time to bootstrap again" bug. It also fixes 30843 an important security-related bug reported by Ilja van Sprundel. You 30844 should upgrade. (We'll send out more details about the bug once people 30845 have had some time to upgrade.) 30846 30847 o Security fixes: 30848 - Fix a heap-corruption bug that may be remotely triggerable on 30849 some platforms. Reported by Ilja van Sprundel. 30850 30851 o Major bugfixes: 30852 - Discard router descriptors as we load them if they are more than 30853 five days old. Otherwise if Tor is off for a long time and then 30854 starts with cached descriptors, it will try to use the onion 30855 keys in those obsolete descriptors when building circuits. Bugfix 30856 on 0.2.0.x. Fixes bug 887. 30857 30858 o Minor features: 30859 - Try to make sure that the version of Libevent we're running with 30860 is binary-compatible with the one we built with. May address bug 30861 897 and others. 30862 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix 30863 for bug 905. Bugfix on 0.2.1.7-alpha. 30864 - Add a new --enable-local-appdata configuration switch to change 30865 the default location of the datadir on win32 from APPDATA to 30866 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA 30867 entirely. Patch from coderman. 30868 30869 o Minor bugfixes: 30870 - Make outbound DNS packets respect the OutboundBindAddress setting. 30871 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha. 30872 - When our circuit fails at the first hop (e.g. we get a destroy 30873 cell back), avoid using that OR connection anymore, and also 30874 tell all the one-hop directory requests waiting for it that they 30875 should fail. Bugfix on 0.2.1.3-alpha. 30876 - In the torify(1) manpage, mention that tsocks will leak your 30877 DNS requests. 30878 30879 30880Changes in version 0.2.1.10-alpha - 2009-01-06 30881 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that 30882 would make the bridge relay not so useful if it had DirPort set to 0, 30883 and one that could let an attacker learn a little bit of information 30884 about the bridge's users), and a bug that would cause your Tor relay 30885 to ignore a circuit create request it can't decrypt (rather than reply 30886 with an error). It also fixes a wide variety of other bugs. 30887 30888 o Major bugfixes: 30889 - If the cached networkstatus consensus is more than five days old, 30890 discard it rather than trying to use it. In theory it could 30891 be useful because it lists alternate directory mirrors, but in 30892 practice it just means we spend many minutes trying directory 30893 mirrors that are long gone from the network. Helps bug 887 a bit; 30894 bugfix on 0.2.0.x. 30895 - Bridge relays that had DirPort set to 0 would stop fetching 30896 descriptors shortly after startup, and then briefly resume 30897 after a new bandwidth test and/or after publishing a new bridge 30898 descriptor. Bridge users that try to bootstrap from them would 30899 get a recent networkstatus but would get descriptors from up to 30900 18 hours earlier, meaning most of the descriptors were obsolete 30901 already. Reported by Tas; bugfix on 0.2.0.13-alpha. 30902 - Prevent bridge relays from serving their 'extrainfo' document 30903 to anybody who asks, now that extrainfo docs include potentially 30904 sensitive aggregated client geoip summaries. Bugfix on 30905 0.2.0.13-alpha. 30906 30907 o Minor features: 30908 - New controller event "clients_seen" to report a geoip-based summary 30909 of which countries we've seen clients from recently. Now controllers 30910 like Vidalia can show bridge operators that they're actually making 30911 a difference. 30912 - Build correctly against versions of OpenSSL 0.9.8 or later built 30913 without support for deprecated functions. 30914 - Update to the "December 19 2008" ip-to-country file. 30915 30916 o Minor bugfixes (on 0.2.0.x): 30917 - Authorities now vote for the Stable flag for any router whose 30918 weighted MTBF is at least 5 days, regardless of the mean MTBF. 30919 - Do not remove routers as too old if we do not have any consensus 30920 document. Bugfix on 0.2.0.7-alpha. 30921 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid. 30922 Spec conformance issue. Bugfix on Tor 0.0.2pre27. 30923 - When an exit relay resolves a stream address to a local IP address, 30924 do not just keep retrying that same exit relay over and 30925 over. Instead, just close the stream. Addresses bug 872. Bugfix 30926 on 0.2.0.32. Patch from rovv. 30927 - If a hidden service sends us an END cell, do not consider 30928 retrying the connection; just close it. Patch from rovv. 30929 - When we made bridge authorities stop serving bridge descriptors over 30930 unencrypted links, we also broke DirPort reachability testing for 30931 bridges. So bridges with a non-zero DirPort were printing spurious 30932 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709. 30933 - When a relay gets a create cell it can't decrypt (e.g. because it's 30934 using the wrong onion key), we were dropping it and letting the 30935 client time out. Now actually answer with a destroy cell. Fixes 30936 bug 904. Bugfix on 0.0.2pre8. 30937 - Squeeze 2-5% out of client performance (according to oprofile) by 30938 improving the implementation of some policy-manipulation functions. 30939 30940 o Minor bugfixes (on 0.2.1.x): 30941 - Make get_interface_address() function work properly again; stop 30942 guessing the wrong parts of our address as our address. 30943 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to 30944 send on that circuit. Otherwise we might violate the proposal-110 30945 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis 30946 thanks to Karsten. 30947 - When we're sending non-EXTEND cells to the first hop in a circuit, 30948 for example to use an encrypted directory connection, we don't need 30949 to use RELAY_EARLY cells: the first hop knows what kind of cell 30950 it is, and nobody else can even see the cell type. Conserving 30951 RELAY_EARLY cells makes it easier to cannibalize circuits like 30952 this later. 30953 - Stop logging nameserver addresses in reverse order. 30954 - If we are retrying a directory download slowly over and over, do 30955 not automatically give up after the 254th failure. Bugfix on 30956 0.2.1.9-alpha. 30957 - Resume reporting accurate "stream end" reasons to the local control 30958 port. They were lost in the changes for Proposal 148. Bugfix on 30959 0.2.1.9-alpha. 30960 30961 o Deprecated and removed features: 30962 - The old "tor --version --version" command, which would print out 30963 the subversion "Id" of most of the source files, is now removed. It 30964 turned out to be less useful than we'd expected, and harder to 30965 maintain. 30966 30967 o Code simplifications and refactoring: 30968 - Change our header file guard macros to be less likely to conflict 30969 with system headers. Adam Langley noticed that we were conflicting 30970 with log.h on Android. 30971 - Tool-assisted documentation cleanup. Nearly every function or 30972 static variable in Tor should have its own documentation now. 30973 30974 30975Changes in version 0.2.1.9-alpha - 2008-12-25 30976 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related. 30977 30978 o New directory authorities: 30979 - gabelmoo (the authority run by Karsten Loesing) now has a new 30980 IP address. 30981 30982 o Security fixes: 30983 - Never use a connection with a mismatched address to extend a 30984 circuit, unless that connection is canonical. A canonical 30985 connection is one whose address is authenticated by the router's 30986 identity key, either in a NETINFO cell or in a router descriptor. 30987 - Avoid a possible memory corruption bug when receiving hidden service 30988 descriptors. Bugfix on 0.2.1.6-alpha. 30989 30990 o Major bugfixes: 30991 - Fix a logic error that would automatically reject all but the first 30992 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for 30993 part of bug 813/868. Bug spotted by coderman. 30994 - When a stream at an exit relay is in state "resolving" or 30995 "connecting" and it receives an "end" relay cell, the exit relay 30996 would silently ignore the end cell and not close the stream. If 30997 the client never closes the circuit, then the exit relay never 30998 closes the TCP connection. Bug introduced in 0.1.2.1-alpha; 30999 reported by "wood". 31000 - When we can't initialize DNS because the network is down, do not 31001 automatically stop Tor from starting. Instead, retry failed 31002 dns_init() every 10 minutes, and change the exit policy to reject 31003 *:* until one succeeds. Fixes bug 691. 31004 31005 o Minor features: 31006 - Give a better error message when an overzealous init script says 31007 "sudo -u username tor --user username". Makes Bug 882 easier for 31008 users to diagnose. 31009 - When a directory authority gives us a new guess for our IP address, 31010 log which authority we used. Hopefully this will help us debug 31011 the recent complaints about bad IP address guesses. 31012 - Detect svn revision properly when we're using git-svn. 31013 - Try not to open more than one descriptor-downloading connection 31014 to an authority at once. This should reduce load on directory 31015 authorities. Fixes bug 366. 31016 - Add cross-certification to newly generated certificates, so that 31017 a signing key is enough information to look up a certificate. 31018 Partial implementation of proposal 157. 31019 - Start serving certificates by <identity digest, signing key digest> 31020 pairs. Partial implementation of proposal 157. 31021 - Clients now never report any stream end reason except 'MISC'. 31022 Implements proposal 148. 31023 - On platforms with a maximum syslog string length, truncate syslog 31024 messages to that length ourselves, rather than relying on the 31025 system to do it for us. 31026 - Optimize out calls to time(NULL) that occur for every IO operation, 31027 or for every cell. On systems where time() is a slow syscall, 31028 this fix will be slightly helpful. 31029 - Exit servers can now answer resolve requests for ip6.arpa addresses. 31030 - When we download a descriptor that we then immediately (as 31031 a directory authority) reject, do not retry downloading it right 31032 away. Should save some bandwidth on authorities. Fix for bug 31033 888. Patch by Sebastian Hahn. 31034 - When a download gets us zero good descriptors, do not notify 31035 Tor that new directory information has arrived. 31036 - Avoid some nasty corner cases in the logic for marking connections 31037 as too old or obsolete or noncanonical for circuits. Partial 31038 bugfix on bug 891. 31039 31040 o Minor features (controller): 31041 - New CONSENSUS_ARRIVED event to note when a new consensus has 31042 been fetched and validated. 31043 - When we realize that another process has modified our cached 31044 descriptors file, print out a more useful error message rather 31045 than triggering an assertion. Fixes bug 885. Patch from Karsten. 31046 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for 31047 controllers to prevent SIGHUP from reloading the 31048 configuration. Fixes bug 856. 31049 31050 o Minor bugfixes: 31051 - Resume using the correct "REASON=" stream when telling the 31052 controller why we closed a stream. Bugfix in 0.2.1.1-alpha. 31053 - When a canonical connection appears later in our internal list 31054 than a noncanonical one for a given OR ID, always use the 31055 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805. 31056 Spotted by rovv. 31057 - Clip the MaxCircuitDirtiness config option to a minimum of 10 31058 seconds. Warn the user if lower values are given in the 31059 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian. 31060 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the 31061 user if lower values are given in the configuration. Bugfix on 31062 0.1.1.17-rc. Patch by Sebastian. 31063 - Fix a race condition when freeing keys shared between main thread 31064 and CPU workers that could result in a memory leak. Bugfix on 31065 0.1.0.1-rc. Fixes bug 889. 31066 31067 o Minor bugfixes (hidden services): 31068 - Do not throw away existing introduction points on SIGHUP (bugfix on 31069 0.0.6pre1); also, do not stall hidden services because we're 31070 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted 31071 by John Brooks. Patch by Karsten. Fixes bug 874. 31072 - Fix a memory leak when we decline to add a v2 rendezvous 31073 descriptor to the cache because we already had a v0 descriptor 31074 with the same ID. Bugfix on 0.2.0.18-alpha. 31075 31076 o Deprecated and removed features: 31077 - RedirectExits has been removed. It was deprecated since 31078 0.2.0.3-alpha. 31079 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It 31080 has been called EXTENDED_EVENTS since 0.1.2.4-alpha. 31081 - Cell pools are now always enabled; --disable-cell-pools is ignored. 31082 31083 o Code simplifications and refactoring: 31084 - Rename the confusing or_is_obsolete field to the more appropriate 31085 is_bad_for_new_circs, and move it to or_connection_t where it 31086 belongs. 31087 - Move edge-only flags from connection_t to edge_connection_t: not 31088 only is this better coding, but on machines of plausible alignment, 31089 it should save 4-8 bytes per connection_t. "Every little bit helps." 31090 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig 31091 for consistency; keep old option working for backward compatibility. 31092 - Simplify the code for finding connections to use for a circuit. 31093 31094 31095Changes in version 0.2.1.8-alpha - 2008-12-08 31096 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases, 31097 builds better on unusual platforms like Solaris and old OS X, and 31098 fixes a variety of other issues. 31099 31100 o Major features: 31101 - New DirPortFrontPage option that takes an html file and publishes 31102 it as "/" on the DirPort. Now relay operators can provide a 31103 disclaimer without needing to set up a separate webserver. There's 31104 a sample disclaimer in contrib/tor-exit-notice.html. 31105 31106 o Security fixes: 31107 - When the client is choosing entry guards, now it selects at most 31108 one guard from a given relay family. Otherwise we could end up with 31109 all of our entry points into the network run by the same operator. 31110 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha. 31111 31112 o Major bugfixes: 31113 - Fix a DOS opportunity during the voting signature collection process 31114 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x. 31115 - Fix a possible segfault when establishing an exit connection. Bugfix 31116 on 0.2.1.5-alpha. 31117 31118 o Minor bugfixes: 31119 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes 31120 bug 859. 31121 - Made Tor a little less aggressive about deleting expired 31122 certificates. Partial fix for bug 854. 31123 - Stop doing unaligned memory access that generated bus errors on 31124 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862. 31125 - Fix a crash bug when changing EntryNodes from the controller. Bugfix 31126 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian. 31127 - Make USR2 log-level switch take effect immediately. Bugfix on 31128 0.1.2.8-beta. 31129 - If one win32 nameserver fails to get added, continue adding the 31130 rest, and don't automatically fail. 31131 - Use fcntl() for locking when flock() is not available. Should fix 31132 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha. 31133 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug 31134 could make gcc generate non-functional binary search code. Bugfix 31135 on 0.2.0.10-alpha. 31136 - Build correctly on platforms without socklen_t. 31137 - Avoid potential crash on internal error during signature collection. 31138 Fixes bug 864. Patch from rovv. 31139 - Do not use C's stdio library for writing to log files. This will 31140 improve logging performance by a minute amount, and will stop 31141 leaking fds when our disk is full. Fixes bug 861. 31142 - Stop erroneous use of O_APPEND in cases where we did not in fact 31143 want to re-seek to the end of a file before every last write(). 31144 - Correct handling of possible malformed authority signing key 31145 certificates with internal signature types. Fixes bug 880. Bugfix 31146 on 0.2.0.3-alpha. 31147 - Fix a hard-to-trigger resource leak when logging credential status. 31148 CID 349. 31149 31150 o Minor features: 31151 - Directory mirrors no longer fetch the v1 directory or 31152 running-routers files. They are obsolete, and nobody asks for them 31153 anymore. This is the first step to making v1 authorities obsolete. 31154 31155 o Minor features (controller): 31156 - Return circuit purposes in response to GETINFO circuit-status. Fixes 31157 bug 858. 31158 31159 31160Changes in version 0.2.0.32 - 2008-11-20 31161 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu 31162 packages (and maybe other packages) noticed by Theo de Raadt, fixes 31163 a smaller security flaw that might allow an attacker to access local 31164 services, further improves hidden service performance, and fixes a 31165 variety of other issues. 31166 31167 o Security fixes: 31168 - The "User" and "Group" config options did not clear the 31169 supplementary group entries for the Tor process. The "User" option 31170 is now more robust, and we now set the groups to the specified 31171 user's primary group. The "Group" option is now ignored. For more 31172 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL 31173 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum 31174 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857. 31175 - The "ClientDNSRejectInternalAddresses" config option wasn't being 31176 consistently obeyed: if an exit relay refuses a stream because its 31177 exit policy doesn't allow it, we would remember what IP address 31178 the relay said the destination address resolves to, even if it's 31179 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv. 31180 31181 o Major bugfixes: 31182 - Fix a DOS opportunity during the voting signature collection process 31183 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x. 31184 31185 o Major bugfixes (hidden services): 31186 - When fetching v0 and v2 rendezvous service descriptors in parallel, 31187 we were failing the whole hidden service request when the v0 31188 descriptor fetch fails, even if the v2 fetch is still pending and 31189 might succeed. Similarly, if the last v2 fetch fails, we were 31190 failing the whole hidden service request even if a v0 fetch is 31191 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha. 31192 - When extending a circuit to a hidden service directory to upload a 31193 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all 31194 requests failed, because the router descriptor has not been 31195 downloaded yet. In these cases, do not attempt to upload the 31196 rendezvous descriptor, but wait until the router descriptor is 31197 downloaded and retry. Likewise, do not attempt to fetch a rendezvous 31198 descriptor from a hidden service directory for which the router 31199 descriptor has not yet been downloaded. Fixes bug 767. Bugfix 31200 on 0.2.0.10-alpha. 31201 31202 o Minor bugfixes: 31203 - Fix several infrequent memory leaks spotted by Coverity. 31204 - When testing for libevent functions, set the LDFLAGS variable 31205 correctly. Found by Riastradh. 31206 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from 31207 bootstrapping with tunneled directory connections. Bugfix on 31208 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam. 31209 - When asked to connect to A.B.exit:80, if we don't know the IP for A 31210 and we know that server B rejects most-but-not all connections to 31211 port 80, we would previously reject the connection. Now, we assume 31212 the user knows what they were asking for. Fixes bug 752. Bugfix 31213 on 0.0.9rc5. Diagnosed by BarkerJr. 31214 - If we overrun our per-second write limits a little, count this as 31215 having used up our write allocation for the second, and choke 31216 outgoing directory writes. Previously, we had only counted this when 31217 we had met our limits precisely. Fixes bug 824. Patch from by rovv. 31218 Bugfix on 0.2.0.x (??). 31219 - Remove the old v2 directory authority 'lefkada' from the default 31220 list. It has been gone for many months. 31221 - Stop doing unaligned memory access that generated bus errors on 31222 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862. 31223 - Make USR2 log-level switch take effect immediately. Bugfix on 31224 0.1.2.8-beta. 31225 31226 o Minor bugfixes (controller): 31227 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on 31228 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807. 31229 31230 31231Changes in version 0.2.1.7-alpha - 2008-11-08 31232 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu 31233 packages (and maybe other packages) noticed by Theo de Raadt, fixes 31234 a smaller security flaw that might allow an attacker to access local 31235 services, adds better defense against DNS poisoning attacks on exit 31236 relays, further improves hidden service performance, and fixes a 31237 variety of other issues. 31238 31239 o Security fixes: 31240 - The "ClientDNSRejectInternalAddresses" config option wasn't being 31241 consistently obeyed: if an exit relay refuses a stream because its 31242 exit policy doesn't allow it, we would remember what IP address 31243 the relay said the destination address resolves to, even if it's 31244 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv. 31245 - The "User" and "Group" config options did not clear the 31246 supplementary group entries for the Tor process. The "User" option 31247 is now more robust, and we now set the groups to the specified 31248 user's primary group. The "Group" option is now ignored. For more 31249 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL 31250 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum 31251 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848. 31252 - Do not use or believe expired v3 authority certificates. Patch 31253 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851. 31254 31255 o Minor features: 31256 - Now NodeFamily and MyFamily config options allow spaces in 31257 identity fingerprints, so it's easier to paste them in. 31258 Suggested by Lucky Green. 31259 - Implement the 0x20 hack to better resist DNS poisoning: set the 31260 case on outgoing DNS requests randomly, and reject responses that do 31261 not match the case correctly. This logic can be disabled with the 31262 ServerDNSRandomizeCase setting, if you are using one of the 0.3% 31263 of servers that do not reliably preserve case in replies. See 31264 "Increased DNS Forgery Resistance through 0x20-Bit Encoding" 31265 for more info. 31266 - Preserve case in replies to DNSPort requests in order to support 31267 the 0x20 hack for resisting DNS poisoning attacks. 31268 31269 o Hidden service performance improvements: 31270 - When the client launches an introduction circuit, retry with a 31271 new circuit after 30 seconds rather than 60 seconds. 31272 - Launch a second client-side introduction circuit in parallel 31273 after a delay of 15 seconds (based on work by Christian Wilms). 31274 - Hidden services start out building five intro circuits rather 31275 than three, and when the first three finish they publish a service 31276 descriptor using those. Now we publish our service descriptor much 31277 faster after restart. 31278 31279 o Minor bugfixes: 31280 - Minor fix in the warning messages when you're having problems 31281 bootstrapping; also, be more forgiving of bootstrap problems when 31282 we're still making incremental progress on a given bootstrap phase. 31283 - When we're choosing an exit node for a circuit, and we have 31284 no pending streams, choose a good general exit rather than one that 31285 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv. 31286 - Send a valid END cell back when a client tries to connect to a 31287 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug 31288 840. Patch from rovv. 31289 - If a broken client asks a non-exit router to connect somewhere, 31290 do not even do the DNS lookup before rejecting the connection. 31291 Fixes another case of bug 619. Patch from rovv. 31292 - Fix another case of assuming, when a specific exit is requested, 31293 that we know more than the user about what hosts it allows. 31294 Fixes another case of bug 752. Patch from rovv. 31295 - Check which hops rendezvous stream cells are associated with to 31296 prevent possible guess-the-streamid injection attacks from 31297 intermediate hops. Fixes another case of bug 446. Based on patch 31298 from rovv. 31299 - Avoid using a negative right-shift when comparing 32-bit 31300 addresses. Possible fix for bug 845 and bug 811. 31301 - Make the assert_circuit_ok() function work correctly on circuits that 31302 have already been marked for close. 31303 - Fix read-off-the-end-of-string error in unit tests when decoding 31304 introduction points. 31305 - Fix uninitialized size field for memory area allocation: may improve 31306 memory performance during directory parsing. 31307 - Treat duplicate certificate fetches as failures, so that we do 31308 not try to re-fetch an expired certificate over and over and over. 31309 - Do not say we're fetching a certificate when we'll in fact skip it 31310 because of a pending download. 31311 31312 31313Changes in version 0.2.1.6-alpha - 2008-09-30 31314 Tor 0.2.1.6-alpha further improves performance and robustness of 31315 hidden services, starts work on supporting per-country relay selection, 31316 and fixes a variety of smaller issues. 31317 31318 o Major features: 31319 - Implement proposal 121: make it possible to build hidden services 31320 that only certain clients are allowed to connect to. This is 31321 enforced at several points, so that unauthorized clients are unable 31322 to send INTRODUCE cells to the service, or even (depending on the 31323 type of authentication) to learn introduction points. This feature 31324 raises the bar for certain kinds of active attacks against hidden 31325 services. Code by Karsten Loesing. 31326 - Relays now store and serve v2 hidden service descriptors by default, 31327 i.e., the new default value for HidServDirectoryV2 is 1. This is 31328 the last step in proposal 114, which aims to make hidden service 31329 lookups more reliable. 31330 - Start work to allow node restrictions to include country codes. The 31331 syntax to exclude nodes in a country with country code XX is 31332 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some 31333 refinement to decide what config options should take priority if 31334 you ask to both use a particular node and exclude it. 31335 - Allow ExitNodes list to include IP ranges and country codes, just 31336 like the Exclude*Nodes lists. Patch from Robert Hogan. 31337 31338 o Major bugfixes: 31339 - Fix a bug when parsing ports in tor_addr_port_parse() that caused 31340 Tor to fail to start if you had it configured to use a bridge 31341 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha. 31342 - When extending a circuit to a hidden service directory to upload a 31343 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all 31344 requests failed, because the router descriptor had not been 31345 downloaded yet. In these cases, we now wait until the router 31346 descriptor is downloaded, and then retry. Likewise, clients 31347 now skip over a hidden service directory if they don't yet have 31348 its router descriptor, rather than futilely requesting it and 31349 putting mysterious complaints in the logs. Fixes bug 767. Bugfix 31350 on 0.2.0.10-alpha. 31351 - When fetching v0 and v2 rendezvous service descriptors in parallel, 31352 we were failing the whole hidden service request when the v0 31353 descriptor fetch fails, even if the v2 fetch is still pending and 31354 might succeed. Similarly, if the last v2 fetch fails, we were 31355 failing the whole hidden service request even if a v0 fetch is 31356 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha. 31357 - DNS replies need to have names matching their requests, but 31358 these names should be in the questions section, not necessarily 31359 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha. 31360 31361 o Minor features: 31362 - Update to the "September 1 2008" ip-to-country file. 31363 - Allow ports 465 and 587 in the default exit policy again. We had 31364 rejected them in 0.1.0.15, because back in 2005 they were commonly 31365 misconfigured and ended up as spam targets. We hear they are better 31366 locked down these days. 31367 - Use a lockfile to make sure that two Tor processes are not 31368 simultaneously running with the same datadir. 31369 - Serve the latest v3 networkstatus consensus via the control 31370 port. Use "getinfo dir/status-vote/current/consensus" to fetch it. 31371 - Better logging about stability/reliability calculations on directory 31372 servers. 31373 - Drop the requirement to have an open dir port for storing and 31374 serving v2 hidden service descriptors. 31375 - Directory authorities now serve a /tor/dbg-stability.txt URL to 31376 help debug WFU and MTBF calculations. 31377 - Implement most of Proposal 152: allow specialized servers to permit 31378 single-hop circuits, and clients to use those servers to build 31379 single-hop circuits when using a specialized controller. Patch 31380 from Josh Albrecht. Resolves feature request 768. 31381 - Add a -p option to tor-resolve for specifying the SOCKS port: some 31382 people find host:port too confusing. 31383 - Make TrackHostExit mappings expire a while after their last use, not 31384 after their creation. Patch from Robert Hogan. 31385 - Provide circuit purposes along with circuit events to the controller. 31386 31387 o Minor bugfixes: 31388 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha. 31389 Reported by Tas. 31390 - Fixed some memory leaks -- some quite frequent, some almost 31391 impossible to trigger -- based on results from Coverity. 31392 - When testing for libevent functions, set the LDFLAGS variable 31393 correctly. Found by Riastradh. 31394 - Fix an assertion bug in parsing policy-related options; possible fix 31395 for bug 811. 31396 - Catch and report a few more bootstrapping failure cases when Tor 31397 fails to establish a TCP connection. Cleanup on 0.2.1.x. 31398 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from 31399 bootstrapping with tunneled directory connections. Bugfix on 31400 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam. 31401 - When asked to connect to A.B.exit:80, if we don't know the IP for A 31402 and we know that server B rejects most-but-not all connections to 31403 port 80, we would previously reject the connection. Now, we assume 31404 the user knows what they were asking for. Fixes bug 752. Bugfix 31405 on 0.0.9rc5. Diagnosed by BarkerJr. 31406 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden 31407 service directories if they have no advertised dir port. Bugfix 31408 on 0.2.0.10-alpha. 31409 - If we overrun our per-second write limits a little, count this as 31410 having used up our write allocation for the second, and choke 31411 outgoing directory writes. Previously, we had only counted this when 31412 we had met our limits precisely. Fixes bug 824. Patch by rovv. 31413 Bugfix on 0.2.0.x (??). 31414 - Avoid a "0 divided by 0" calculation when calculating router uptime 31415 at directory authorities. Bugfix on 0.2.0.8-alpha. 31416 - Make DNS resolved controller events into "CLOSED", not 31417 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves 31418 bug 807. 31419 - Fix a bug where an unreachable relay would establish enough 31420 reachability testing circuits to do a bandwidth test -- if 31421 we already have a connection to the middle hop of the testing 31422 circuit, then it could establish the last hop by using the existing 31423 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing 31424 circuits no longer use entry guards in 0.2.1.3-alpha. 31425 - If we have correct permissions on $datadir, we complain to stdout 31426 and fail to start. But dangerous permissions on 31427 $datadir/cached-status/ would cause us to open a log and complain 31428 there. Now complain to stdout and fail to start in both cases. Fixes 31429 bug 820, reported by seeess. 31430 - Remove the old v2 directory authority 'lefkada' from the default 31431 list. It has been gone for many months. 31432 31433 o Code simplifications and refactoring: 31434 - Revise the connection_new functions so that a more typesafe variant 31435 exists. This will work better with Coverity, and let us find any 31436 actual mistakes we're making here. 31437 - Refactor unit testing logic so that dmalloc can be used sensibly 31438 with unit tests to check for memory leaks. 31439 - Move all hidden-service related fields from connection and circuit 31440 structure to substructures: this way they won't eat so much memory. 31441 31442 31443Changes in version 0.2.0.31 - 2008-09-03 31444 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix 31445 a big bug we're seeing where in rare cases traffic from one Tor stream 31446 gets mixed into another stream, and fixes a variety of smaller issues. 31447 31448 o Major bugfixes: 31449 - Make sure that two circuits can never exist on the same connection 31450 with the same circuit ID, even if one is marked for close. This 31451 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc. 31452 - Relays now reject risky extend cells: if the extend cell includes 31453 a digest of all zeroes, or asks to extend back to the relay that 31454 sent the extend cell, tear down the circuit. Ideas suggested 31455 by rovv. 31456 - If not enough of our entry guards are available so we add a new 31457 one, we might use the new one even if it overlapped with the 31458 current circuit's exit relay (or its family). Anonymity bugfix 31459 pointed out by rovv. 31460 31461 o Minor bugfixes: 31462 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug 31463 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha. 31464 - Correctly detect the presence of the linux/netfilter_ipv4.h header 31465 when building against recent kernels. Bugfix on 0.1.2.1-alpha. 31466 - Pick size of default geoip filename string correctly on windows. 31467 Fixes bug 806. Bugfix on 0.2.0.30. 31468 - Make the autoconf script accept the obsolete --with-ssl-dir 31469 option as an alias for the actually-working --with-openssl-dir 31470 option. Fix the help documentation to recommend --with-openssl-dir. 31471 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha. 31472 - When using the TransPort option on OpenBSD, and using the User 31473 option to change UID and drop privileges, make sure to open 31474 /dev/pf before dropping privileges. Fixes bug 782. Patch from 31475 Christopher Davis. Bugfix on 0.1.2.1-alpha. 31476 - Try to attach connections immediately upon receiving a RENDEZVOUS2 31477 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two 31478 on the client side when connecting to a hidden service. Bugfix 31479 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743. 31480 - When closing an application-side connection because its circuit is 31481 getting torn down, generate the stream event correctly. Bugfix on 31482 0.1.2.x. Anonymous patch. 31483 31484 31485Changes in version 0.2.1.5-alpha - 2008-08-31 31486 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts 31487 in a lot of the infrastructure for adding authorization to hidden 31488 services, lays the groundwork for having clients read their load 31489 balancing information out of the networkstatus consensus rather than 31490 the individual router descriptors, addresses two potential anonymity 31491 issues, and fixes a variety of smaller issues. 31492 31493 o Major features: 31494 - Convert many internal address representations to optionally hold 31495 IPv6 addresses. 31496 - Generate and accept IPv6 addresses in many protocol elements. 31497 - Make resolver code handle nameservers located at ipv6 addresses. 31498 - Begin implementation of proposal 121 ("Client authorization for 31499 hidden services"): configure hidden services with client 31500 authorization, publish descriptors for them, and configure 31501 authorization data for hidden services at clients. The next 31502 step is to actually access hidden services that perform client 31503 authorization. 31504 - More progress toward proposal 141: Network status consensus 31505 documents and votes now contain bandwidth information for each 31506 router and a summary of that router's exit policy. Eventually this 31507 will be used by clients so that they do not have to download every 31508 known descriptor before building circuits. 31509 31510 o Major bugfixes (on 0.2.0.x and before): 31511 - When sending CREATED cells back for a given circuit, use a 64-bit 31512 connection ID to find the right connection, rather than an addr:port 31513 combination. Now that we can have multiple OR connections between 31514 the same ORs, it is no longer possible to use addr:port to uniquely 31515 identify a connection. 31516 - Relays now reject risky extend cells: if the extend cell includes 31517 a digest of all zeroes, or asks to extend back to the relay that 31518 sent the extend cell, tear down the circuit. Ideas suggested 31519 by rovv. 31520 - If not enough of our entry guards are available so we add a new 31521 one, we might use the new one even if it overlapped with the 31522 current circuit's exit relay (or its family). Anonymity bugfix 31523 pointed out by rovv. 31524 31525 o Minor bugfixes: 31526 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug 31527 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha. 31528 - When using the TransPort option on OpenBSD, and using the User 31529 option to change UID and drop privileges, make sure to open /dev/pf 31530 before dropping privileges. Fixes bug 782. Patch from Christopher 31531 Davis. Bugfix on 0.1.2.1-alpha. 31532 - Correctly detect the presence of the linux/netfilter_ipv4.h header 31533 when building against recent kernels. Bugfix on 0.1.2.1-alpha. 31534 - Add a missing safe_str() call for a debug log message. 31535 - Use 64 bits instead of 32 bits for connection identifiers used with 31536 the controller protocol, to greatly reduce risk of identifier reuse. 31537 - Make the autoconf script accept the obsolete --with-ssl-dir 31538 option as an alias for the actually-working --with-openssl-dir 31539 option. Fix the help documentation to recommend --with-openssl-dir. 31540 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha. 31541 31542 o Minor features: 31543 - Rate-limit too-many-sockets messages: when they happen, they happen 31544 a lot. Resolves bug 748. 31545 - Resist DNS poisoning a little better by making sure that names in 31546 answer sections match. 31547 - Print the SOCKS5 error message string as well as the error code 31548 when a tor-resolve request fails. Patch from Jacob. 31549 31550 31551Changes in version 0.2.1.4-alpha - 2008-08-04 31552 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha. 31553 31554 o Major bugfixes: 31555 - The address part of exit policies was not correctly written 31556 to router descriptors. This generated router descriptors that failed 31557 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix 31558 on 0.2.1.3-alpha. 31559 - Tor triggered a false assert when extending a circuit to a relay 31560 but we already have a connection open to that relay. Noticed by 31561 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha. 31562 31563 o Minor bugfixes: 31564 - Fix a hidden service logging bug: in some edge cases, the router 31565 descriptor of a previously picked introduction point becomes 31566 obsolete and we need to give up on it rather than continually 31567 complaining that it has become obsolete. Observed by xiando. Bugfix 31568 on 0.2.1.3-alpha. 31569 31570 o Removed features: 31571 - Take out the TestVia config option, since it was a workaround for 31572 a bug that was fixed in Tor 0.1.1.21. 31573 31574 31575Changes in version 0.2.1.3-alpha - 2008-08-03 31576 Tor 0.2.1.3-alpha implements most of the pieces to prevent 31577 infinite-length circuit attacks (see proposal 110); fixes a bug that 31578 might cause exit relays to corrupt streams they send back; allows 31579 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and 31580 ExcludeExitNodes config options; and fixes a big pile of bugs. 31581 31582 o Bootstrapping bugfixes (on 0.2.1.x-alpha): 31583 - Send a bootstrap problem "warn" event on the first problem if the 31584 reason is NO_ROUTE (that is, our network is down). 31585 31586 o Major features: 31587 - Implement most of proposal 110: The first K cells to be sent 31588 along a circuit are marked as special "early" cells; only K "early" 31589 cells will be allowed. Once this code is universal, we can block 31590 certain kinds of DOS attack by requiring that EXTEND commands must 31591 be sent using an "early" cell. 31592 31593 o Major bugfixes: 31594 - Try to attach connections immediately upon receiving a RENDEZVOUS2 31595 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two 31596 on the client side when connecting to a hidden service. Bugfix 31597 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743. 31598 - Ensure that two circuits can never exist on the same connection 31599 with the same circuit ID, even if one is marked for close. This 31600 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc. 31601 31602 o Minor features: 31603 - When relays do their initial bandwidth measurement, don't limit 31604 to just our entry guards for the test circuits. Otherwise we tend 31605 to have multiple test circuits going through a single entry guard, 31606 which makes our bandwidth test less accurate. Fixes part of bug 654; 31607 patch contributed by Josh Albrecht. 31608 - Add an ExcludeExitNodes option so users can list a set of nodes 31609 that should be be excluded from the exit node position, but 31610 allowed elsewhere. Implements proposal 151. 31611 - Allow address patterns (e.g., 255.128.0.0/16) to appear in 31612 ExcludeNodes and ExcludeExitNodes lists. 31613 - Change the implementation of ExcludeNodes and ExcludeExitNodes to 31614 be more efficient. Formerly it was quadratic in the number of 31615 servers; now it should be linear. Fixes bug 509. 31616 - Save 16-22 bytes per open circuit by moving the n_addr, n_port, 31617 and n_conn_id_digest fields into a separate structure that's 31618 only needed when the circuit has not yet attached to an n_conn. 31619 31620 o Minor bugfixes: 31621 - Change the contrib/tor.logrotate script so it makes the new 31622 logs as "_tor:_tor" rather than the default, which is generally 31623 "root:wheel". Fixes bug 676, reported by Serge Koksharov. 31624 - Stop using __attribute__((nonnull)) with GCC: it can give us useful 31625 warnings (occasionally), but it can also cause the compiler to 31626 eliminate error-checking code. Suggested by Peter Gutmann. 31627 - When a hidden service is giving up on an introduction point candidate 31628 that was not included in the last published rendezvous descriptor, 31629 don't reschedule publication of the next descriptor. Fixes bug 763. 31630 Bugfix on 0.0.9.3. 31631 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and 31632 HiddenServiceExcludeNodes as obsolete: they never worked properly, 31633 and nobody claims to be using them. Fixes bug 754. Bugfix on 31634 0.1.0.1-rc. Patch from Christian Wilms. 31635 - Fix a small alignment and memory-wasting bug on buffer chunks. 31636 Spotted by rovv. 31637 31638 o Minor bugfixes (controller): 31639 - When closing an application-side connection because its circuit 31640 is getting torn down, generate the stream event correctly. 31641 Bugfix on 0.1.2.x. Anonymous patch. 31642 31643 o Removed features: 31644 - Remove all backward-compatibility code to support relays running 31645 versions of Tor so old that they no longer work at all on the 31646 Tor network. 31647 31648 31649Changes in version 0.2.0.30 - 2008-07-15 31650 o Minor bugfixes: 31651 - Stop using __attribute__((nonnull)) with GCC: it can give us useful 31652 warnings (occasionally), but it can also cause the compiler to 31653 eliminate error-checking code. Suggested by Peter Gutmann. 31654 31655 31656Changes in version 0.2.0.29-rc - 2008-07-08 31657 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more 31658 hidden-service performance bugs, and fixes a bunch of smaller bugs. 31659 31660 o Major bugfixes: 31661 - If you have more than one bridge but don't know their keys, 31662 you would only launch a request for the descriptor of the first one 31663 on your list. (Tor considered launching requests for the others, but 31664 found that it already had a connection on the way for $0000...0000 31665 so it didn't open another.) Bugfix on 0.2.0.x. 31666 - If you have more than one bridge but don't know their keys, and the 31667 connection to one of the bridges failed, you would cancel all 31668 pending bridge connections. (After all, they all have the same 31669 digest.) Bugfix on 0.2.0.x. 31670 - When a hidden service was trying to establish an introduction point, 31671 and Tor had built circuits preemptively for such purposes, we 31672 were ignoring all the preemptive circuits and launching a new one 31673 instead. Bugfix on 0.2.0.14-alpha. 31674 - When a hidden service was trying to establish an introduction point, 31675 and Tor *did* manage to reuse one of the preemptively built 31676 circuits, it didn't correctly remember which one it used, 31677 so it asked for another one soon after, until there were no 31678 more preemptive circuits, at which point it launched one from 31679 scratch. Bugfix on 0.0.9.x. 31680 - Make directory servers include the X-Your-Address-Is: http header in 31681 their responses even for begin_dir conns. Now clients who only 31682 ever use begin_dir connections still have a way to learn their IP 31683 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy. 31684 31685 o Minor bugfixes: 31686 - Fix a macro/CPP interaction that was confusing some compilers: 31687 some GCCs don't like #if/#endif pairs inside macro arguments. 31688 Fixes bug 707. 31689 - Fix macro collision between OpenSSL 0.9.8h and Windows headers. 31690 Fixes bug 704; fix from Steven Murdoch. 31691 - When opening /dev/null in finish_daemonize(), do not pass the 31692 O_CREAT flag. Fortify was complaining, and correctly so. Fixes 31693 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19. 31694 - Correctly detect transparent proxy support on Linux hosts that 31695 require in.h to be included before netfilter_ipv4.h. Patch 31696 from coderman. 31697 - Disallow session resumption attempts during the renegotiation 31698 stage of the v2 handshake protocol. Clients should never be trying 31699 session resumption at this point, but apparently some did, in 31700 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug 31701 found by Geoff Goodell. 31702 31703 31704Changes in version 0.2.1.2-alpha - 2008-06-20 31705 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to 31706 make it easier to set up your own private Tor network; fixes several 31707 big bugs with using more than one bridge relay; fixes a big bug with 31708 offering hidden services quickly after Tor starts; and uses a better 31709 API for reporting potential bootstrapping problems to the controller. 31710 31711 o Major features: 31712 - New TestingTorNetwork config option to allow adjustment of 31713 previously constant values that, while reasonable, could slow 31714 bootstrapping. Implements proposal 135. Patch from Karsten. 31715 31716 o Major bugfixes: 31717 - If you have more than one bridge but don't know their digests, 31718 you would only learn a request for the descriptor of the first one 31719 on your list. (Tor considered launching requests for the others, but 31720 found that it already had a connection on the way for $0000...0000 31721 so it didn't open another.) Bugfix on 0.2.0.x. 31722 - If you have more than one bridge but don't know their digests, 31723 and the connection to one of the bridges failed, you would cancel 31724 all pending bridge connections. (After all, they all have the 31725 same digest.) Bugfix on 0.2.0.x. 31726 - When establishing a hidden service, introduction points that 31727 originate from cannibalized circuits are completely ignored and not 31728 included in rendezvous service descriptors. This might be another 31729 reason for delay in making a hidden service available. Bugfix 31730 from long ago (0.0.9.x?) 31731 31732 o Minor features: 31733 - Allow OpenSSL to use dynamic locks if it wants. 31734 - When building a consensus, do not include routers that are down. 31735 This will cut down 30% to 40% on consensus size. Implements 31736 proposal 138. 31737 - In directory authorities' approved-routers files, allow 31738 fingerprints with or without space. 31739 - Add a "GETINFO /status/bootstrap-phase" controller option, so the 31740 controller can query our current bootstrap state in case it attaches 31741 partway through and wants to catch up. 31742 - Send an initial "Starting" bootstrap status event, so we have a 31743 state to start out in. 31744 31745 o Minor bugfixes: 31746 - Asking for a conditional consensus at .../consensus/<fingerprints> 31747 would crash a dirserver if it did not already have a 31748 consensus. Bugfix on 0.2.1.1-alpha. 31749 - Clean up some macro/CPP interactions: some GCC versions don't like 31750 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on 31751 0.2.0.x. 31752 31753 o Bootstrapping bugfixes (on 0.2.1.1-alpha): 31754 - Directory authorities shouldn't complain about bootstrapping 31755 problems just because they do a lot of reachability testing and 31756 some of the connection attempts fail. 31757 - Start sending "count" and "recommendation" key/value pairs in 31758 bootstrap problem status events, so the controller can hear about 31759 problems even before Tor decides they're worth reporting for sure. 31760 - If you're using bridges, generate "bootstrap problem" warnings 31761 as soon as you run out of working bridges, rather than waiting 31762 for ten failures -- which will never happen if you have less than 31763 ten bridges. 31764 - If we close our OR connection because there's been a circuit 31765 pending on it for too long, we were telling our bootstrap status 31766 events "REASON=NONE". Now tell them "REASON=TIMEOUT". 31767 31768 31769Changes in version 0.2.1.1-alpha - 2008-06-13 31770 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that 31771 were making the Tor process bloat especially on Linux; makes our TLS 31772 handshake blend in better; sends "bootstrap phase" status events to 31773 the controller, so it can keep the user informed of progress (and 31774 problems) fetching directory information and establishing circuits; 31775 and adds a variety of smaller features. 31776 31777 o Major features: 31778 - More work on making our TLS handshake blend in: modify the list 31779 of ciphers advertised by OpenSSL in client mode to even more 31780 closely resemble a common web browser. We cheat a little so that 31781 we can advertise ciphers that the locally installed OpenSSL doesn't 31782 know about. 31783 - Start sending "bootstrap phase" status events to the controller, 31784 so it can keep the user informed of progress fetching directory 31785 information and establishing circuits. Also inform the controller 31786 if we think we're stuck at a particular bootstrap phase. Implements 31787 proposal 137. 31788 - Resume using OpenSSL's RAND_poll() for better (and more portable) 31789 cross-platform entropy collection again. We used to use it, then 31790 stopped using it because of a bug that could crash systems that 31791 called RAND_poll when they had a lot of fds open. It looks like the 31792 bug got fixed in late 2006. Our new behavior is to call RAND_poll() 31793 at startup, and to call RAND_poll() when we reseed later only if 31794 we have a non-buggy OpenSSL version. 31795 31796 o Major bugfixes: 31797 - When we choose to abandon a new entry guard because we think our 31798 older ones might be better, close any circuits pending on that 31799 new entry guard connection. This fix should make us recover much 31800 faster when our network is down and then comes back. Bugfix on 31801 0.1.2.8-beta; found by lodger. 31802 31803 o Memory fixes and improvements: 31804 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c, 31805 to avoid unused RAM in buffer chunks and memory pools. 31806 - Speed up parsing and cut down on memory fragmentation by using 31807 stack-style allocations for parsing directory objects. Previously, 31808 this accounted for over 40% of allocations from within Tor's code 31809 on a typical directory cache. 31810 - Use a Bloom filter rather than a digest-based set to track which 31811 descriptors we need to keep around when we're cleaning out old 31812 router descriptors. This speeds up the computation significantly, 31813 and may reduce fragmentation. 31814 - Reduce the default smartlist size from 32 to 16; it turns out that 31815 most smartlists hold around 8-12 elements tops. 31816 - Make dumpstats() log the fullness and size of openssl-internal 31817 buffers. 31818 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS 31819 patch to their OpenSSL, turn it on to save memory on servers. This 31820 patch will (with any luck) get included in a mainline distribution 31821 before too long. 31822 - Never use OpenSSL compression: it wastes RAM and CPU trying to 31823 compress cells, which are basically all encrypted, compressed, 31824 or both. 31825 31826 o Minor bugfixes: 31827 - Stop reloading the router list from disk for no reason when we 31828 run out of reachable directory mirrors. Once upon a time reloading 31829 it would set the 'is_running' flag back to 1 for them. It hasn't 31830 done that for a long time. 31831 - In very rare situations new hidden service descriptors were 31832 published earlier than 30 seconds after the last change to the 31833 service. (We currently think that a hidden service descriptor 31834 that's been stable for 30 seconds is worth publishing.) 31835 31836 o Minor features: 31837 - Allow separate log levels to be configured for different logging 31838 domains. For example, this allows one to log all notices, warnings, 31839 or errors, plus all memory management messages of level debug or 31840 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor. 31841 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3, 31842 and stop using a warning that had become unfixably verbose under 31843 GCC 4.3. 31844 - New --hush command-line option similar to --quiet. While --quiet 31845 disables all logging to the console on startup, --hush limits the 31846 output to messages of warning and error severity. 31847 - Servers support a new URL scheme for consensus downloads that 31848 allows the client to specify which authorities are trusted. 31849 The server then only sends the consensus if the client will trust 31850 it. Otherwise a 404 error is sent back. Clients use this 31851 new scheme when the server supports it (meaning it's running 31852 0.2.1.1-alpha or later). Implements proposal 134. 31853 - New configure/torrc options (--enable-geoip-stats, 31854 DirRecordUsageByCountry) to record how many IPs we've served 31855 directory info to in each country code, how many status documents 31856 total we've sent to each country code, and what share of the total 31857 directory requests we should expect to see. 31858 - Use the TLS1 hostname extension to more closely resemble browser 31859 behavior. 31860 - Lots of new unit tests. 31861 - Add a macro to implement the common pattern of iterating through 31862 two parallel lists in lockstep. 31863 31864 31865Changes in version 0.2.0.28-rc - 2008-06-13 31866 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service 31867 performance bug, and fixes a bunch of smaller bugs. 31868 31869 o Anonymity fixes: 31870 - Fix a bug where, when we were choosing the 'end stream reason' to 31871 put in our relay end cell that we send to the exit relay, Tor 31872 clients on Windows were sometimes sending the wrong 'reason'. The 31873 anonymity problem is that exit relays may be able to guess whether 31874 the client is running Windows, thus helping partition the anonymity 31875 set. Down the road we should stop sending reasons to exit relays, 31876 or otherwise prevent future versions of this bug. 31877 31878 o Major bugfixes: 31879 - While setting up a hidden service, some valid introduction circuits 31880 were overlooked and abandoned. This might be the reason for 31881 the long delay in making a hidden service available. Bugfix on 31882 0.2.0.14-alpha. 31883 31884 o Minor features: 31885 - Update to the "June 9 2008" ip-to-country file. 31886 - Run 'make test' as part of 'make dist', so we stop releasing so 31887 many development snapshots that fail their unit tests. 31888 31889 o Minor bugfixes: 31890 - When we're checking if we have enough dir info for each relay 31891 to begin establishing circuits, make sure that we actually have 31892 the descriptor listed in the consensus, not just any descriptor. 31893 Bugfix on 0.1.2.x. 31894 - Bridge relays no longer print "xx=0" in their extrainfo document 31895 for every single country code in the geoip db. Bugfix on 31896 0.2.0.27-rc. 31897 - Only warn when we fail to load the geoip file if we were planning to 31898 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc. 31899 - If we change our MaxAdvertisedBandwidth and then reload torrc, 31900 Tor won't realize it should publish a new relay descriptor. Fixes 31901 bug 688, reported by mfr. Bugfix on 0.1.2.x. 31902 - When we haven't had any application requests lately, don't bother 31903 logging that we have expired a bunch of descriptors. Bugfix 31904 on 0.1.2.x. 31905 - Make relay cells written on a connection count as non-padding when 31906 tracking how long a connection has been in use. Bugfix on 31907 0.2.0.1-alpha. Spotted by lodger. 31908 - Fix unit tests in 0.2.0.27-rc. 31909 - Fix compile on Windows. 31910 31911 31912Changes in version 0.2.0.27-rc - 2008-06-03 31913 Tor 0.2.0.27-rc adds a few features we left out of the earlier 31914 release candidates. In particular, we now include an IP-to-country 31915 GeoIP database, so controllers can easily look up what country a 31916 given relay is in, and so bridge relays can give us some sanitized 31917 summaries about which countries are making use of bridges. (See proposal 31918 126-geoip-fetching.txt for details.) 31919 31920 o Major features: 31921 - Include an IP-to-country GeoIP file in the tarball, so bridge 31922 relays can report sanitized summaries of the usage they're seeing. 31923 31924 o Minor features: 31925 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by 31926 Robert Hogan. Fixes the first part of bug 681. 31927 - Make bridge authorities never serve extrainfo docs. 31928 - Add support to detect Libevent versions in the 1.4.x series 31929 on mingw. 31930 - Fix build on gcc 4.3 with --enable-gcc-warnings set. 31931 - Include a new contrib/tor-exit-notice.html file that exit relay 31932 operators can put on their website to help reduce abuse queries. 31933 31934 o Minor bugfixes: 31935 - When tunneling an encrypted directory connection, and its first 31936 circuit fails, do not leave it unattached and ask the controller 31937 to deal. Fixes the second part of bug 681. 31938 - Make bridge authorities correctly expire old extrainfo documents 31939 from time to time. 31940 31941 31942Changes in version 0.2.0.26-rc - 2008-05-13 31943 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug 31944 in Debian's OpenSSL packages. All users running any 0.2.0.x version 31945 should upgrade, whether they're running Debian or not. 31946 31947 o Major security fixes: 31948 - Use new V3 directory authority keys on the tor26, gabelmoo, and 31949 moria1 V3 directory authorities. The old keys were generated with 31950 a vulnerable version of Debian's OpenSSL package, and must be 31951 considered compromised. Other authorities' keys were not generated 31952 with an affected version of OpenSSL. 31953 31954 o Major bugfixes: 31955 - List authority signatures as "unrecognized" based on DirServer 31956 lines, not on cert cache. Bugfix on 0.2.0.x. 31957 31958 o Minor features: 31959 - Add a new V3AuthUseLegacyKey option to make it easier for 31960 authorities to change their identity keys if they have to. 31961 31962 31963Changes in version 0.2.0.25-rc - 2008-04-23 31964 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs. 31965 31966 o Major bugfixes: 31967 - Remember to initialize threading before initializing logging. 31968 Otherwise, many BSD-family implementations will crash hard on 31969 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc. 31970 31971 o Minor bugfixes: 31972 - Authorities correctly free policies on bad servers on 31973 exit. Fixes bug 672. Bugfix on 0.2.0.x. 31974 31975 31976Changes in version 0.2.0.24-rc - 2008-04-22 31977 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth 31978 v3 directory authority, makes relays with dynamic IP addresses and no 31979 DirPort notice more quickly when their IP address changes, fixes a few 31980 rare crashes and memory leaks, and fixes a few other miscellaneous bugs. 31981 31982 o New directory authorities: 31983 - Take lefkada out of the list of v3 directory authorities, since 31984 it has been down for months. 31985 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory 31986 authority. 31987 31988 o Major bugfixes: 31989 - Detect address changes more quickly on non-directory mirror 31990 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652. 31991 31992 o Minor features (security): 31993 - Reject requests for reverse-dns lookup of names that are in 31994 a private address space. Patch from lodger. 31995 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch 31996 from lodger. 31997 31998 o Minor bugfixes (crashes): 31999 - Avoid a rare assert that can trigger when Tor doesn't have much 32000 directory information yet and it tries to fetch a v2 hidden 32001 service descriptor. Fixes bug 651, reported by nwf. 32002 - Initialize log mutex before initializing dmalloc. Otherwise, 32003 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha. 32004 - Use recursive pthread mutexes in order to avoid deadlock when 32005 logging debug-level messages to a controller. Bug spotted by nwf, 32006 bugfix on 0.2.0.16-alpha. 32007 32008 o Minor bugfixes (resource management): 32009 - Keep address policies from leaking memory: start their refcount 32010 at 1, not 2. Bugfix on 0.2.0.16-alpha. 32011 - Free authority certificates on exit, so they don't look like memory 32012 leaks. Bugfix on 0.2.0.19-alpha. 32013 - Free static hashtables for policy maps and for TLS connections on 32014 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x. 32015 - Avoid allocating extra space when computing consensuses on 64-bit 32016 platforms. Bug spotted by aakova. 32017 32018 o Minor bugfixes (misc): 32019 - Do not read the configuration file when we've only been told to 32020 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix 32021 based on patch from Sebastian Hahn. 32022 - Exit relays that are used as a client can now reach themselves 32023 using the .exit notation, rather than just launching an infinite 32024 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn. 32025 - When attempting to open a logfile fails, tell us why. 32026 - Fix a dumb bug that was preventing us from knowing that we should 32027 preemptively build circuits to handle expected directory requests. 32028 Fixes bug 660. Bugfix on 0.1.2.x. 32029 - Warn less verbosely about clock skew from netinfo cells from 32030 untrusted sources. Fixes bug 663. 32031 - Make controller stream events for DNS requests more consistent, 32032 by adding "new stream" events for DNS requests, and removing 32033 spurious "stream closed" events" for cached reverse resolves. 32034 Patch from mwenge. Fixes bug 646. 32035 - Correctly notify one-hop connections when a circuit build has 32036 failed. Possible fix for bug 669. Found by lodger. 32037 32038 32039Changes in version 0.2.0.23-rc - 2008-03-24 32040 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It 32041 makes bootstrapping faster if the first directory mirror you contact 32042 is down. The bundles also include the new Vidalia 0.1.2 release. 32043 32044 o Major bugfixes: 32045 - When a tunneled directory request is made to a directory server 32046 that's down, notice after 30 seconds rather than 120 seconds. Also, 32047 fail any begindir streams that are pending on it, so they can 32048 retry elsewhere. This was causing multi-minute delays on bootstrap. 32049 32050 32051Changes in version 0.2.0.22-rc - 2008-03-18 32052 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It 32053 enables encrypted directory connections by default for non-relays, fixes 32054 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many 32055 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17. 32056 32057 o Major features: 32058 - Enable encrypted directory connections by default for non-relays, 32059 so censor tools that block Tor directory connections based on their 32060 plaintext patterns will no longer work. This means Tor works in 32061 certain censored countries by default again. 32062 32063 o Major bugfixes: 32064 - Make sure servers always request certificates from clients during 32065 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc. 32066 - Do not enter a CPU-eating loop when a connection is closed in 32067 the middle of client-side TLS renegotiation. Fixes bug 622. Bug 32068 diagnosed by lodger; bugfix on 0.2.0.20-rc. 32069 - Fix assertion failure that could occur when a blocked circuit 32070 became unblocked, and it had pending client DNS requests. Bugfix 32071 on 0.2.0.1-alpha. Fixes bug 632. 32072 32073 o Minor bugfixes (on 0.1.2.x): 32074 - Generate "STATUS_SERVER" events rather than misspelled 32075 "STATUS_SEVER" events. Caught by mwenge. 32076 - When counting the number of bytes written on a TLS connection, 32077 look at the BIO actually used for writing to the network, not 32078 at the BIO used (sometimes) to buffer data for the network. 32079 Looking at different BIOs could result in write counts on the 32080 order of ULONG_MAX. Fixes bug 614. 32081 - On Windows, correctly detect errors when listing the contents of 32082 a directory. Fix from lodger. 32083 32084 o Minor bugfixes (on 0.2.0.x): 32085 - Downgrade "sslv3 alert handshake failure" message to INFO. 32086 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but 32087 left BandwidthRate and BandwidthBurst at the default, we would be 32088 silently limited by those defaults. Now raise them to match the 32089 RelayBandwidth* values. 32090 - Fix the SVK version detection logic to work correctly on a branch. 32091 - Make --enable-openbsd-malloc work correctly on Linux with alpha 32092 CPUs. Fixes bug 625. 32093 - Logging functions now check that the passed severity is sane. 32094 - Use proper log levels in the testsuite call of 32095 get_interface_address6(). 32096 - When using a nonstandard malloc, do not use the platform values for 32097 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE. 32098 - Make the openbsd malloc code use 8k pages on alpha CPUs and 32099 16k pages on ia64. 32100 - Detect mismatched page sizes when using --enable-openbsd-malloc. 32101 - Avoid double-marked-for-close warning when certain kinds of invalid 32102 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix 32103 for bug 617. Bugfix on 0.2.0.1-alpha. 32104 - Make sure that the "NULL-means-reject *:*" convention is followed by 32105 all the policy manipulation functions, avoiding some possible crash 32106 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha. 32107 - Fix the implementation of ClientDNSRejectInternalAddresses so that it 32108 actually works, and doesn't warn about every single reverse lookup. 32109 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha. 32110 32111 o Minor features: 32112 - Only log guard node status when guard node status has changed. 32113 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will 32114 make "INFO" 75% less verbose. 32115 32116 32117Changes in version 0.2.0.21-rc - 2008-03-02 32118 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It 32119 makes Tor work well with Vidalia again, fixes a rare assert bug, 32120 and fixes a pair of more minor bugs. The bundles also include Vidalia 32121 0.1.0 and Torbutton 1.1.16. 32122 32123 o Major bugfixes: 32124 - The control port should declare that it requires password auth 32125 when HashedControlSessionPassword is set too. Patch from Matt Edman; 32126 bugfix on 0.2.0.20-rc. Fixes bug 615. 32127 - Downgrade assert in connection_buckets_decrement() to a log message. 32128 This may help us solve bug 614, and in any case will make its 32129 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy. 32130 - We were sometimes miscounting the number of bytes read from the 32131 network, causing our rate limiting to not be followed exactly. 32132 Bugfix on 0.2.0.16-alpha. Reported by lodger. 32133 32134 o Minor bugfixes: 32135 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported 32136 OpenSSL versions should have been working fine. Diagnosis and patch 32137 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616. 32138 Bugfix on 0.2.0.20-rc. 32139 32140 32141Changes in version 0.2.0.20-rc - 2008-02-24 32142 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It 32143 makes more progress towards normalizing Tor's TLS handshake, makes 32144 hidden services work better again, helps relays bootstrap if they don't 32145 know their IP address, adds optional support for linking in openbsd's 32146 allocator or tcmalloc, allows really fast relays to scale past 15000 32147 sockets, and fixes a bunch of minor bugs reported by Veracode. 32148 32149 o Major features: 32150 - Enable the revised TLS handshake based on the one designed by 32151 Steven Murdoch in proposal 124, as revised in proposal 130. It 32152 includes version negotiation for OR connections as described in 32153 proposal 105. The new handshake is meant to be harder for censors 32154 to fingerprint, and it adds the ability to detect certain kinds of 32155 man-in-the-middle traffic analysis attacks. The version negotiation 32156 feature will allow us to improve Tor's link protocol more safely 32157 in the future. 32158 - Choose which bridge to use proportional to its advertised bandwidth, 32159 rather than uniformly at random. This should speed up Tor for 32160 bridge users. Also do this for people who set StrictEntryNodes. 32161 - When a TrackHostExits-chosen exit fails too many times in a row, 32162 stop using it. Bugfix on 0.1.2.x; fixes bug 437. 32163 32164 o Major bugfixes: 32165 - Resolved problems with (re-)fetching hidden service descriptors. 32166 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha 32167 and 0.2.0.19-alpha. 32168 - If we only ever used Tor for hidden service lookups or posts, we 32169 would stop building circuits and start refusing connections after 32170 24 hours, since we falsely believed that Tor was dormant. Reported 32171 by nwf; bugfix on 0.1.2.x. 32172 - Servers that don't know their own IP address should go to the 32173 authorities for their first directory fetch, even if their DirPort 32174 is off or if they don't know they're reachable yet. This will help 32175 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609. 32176 - When counting the number of open sockets, count not only the number 32177 of sockets we have received from the socket() call, but also 32178 the number we've gotten from accept() and socketpair(). This bug 32179 made us fail to count all sockets that we were using for incoming 32180 connections. Bugfix on 0.2.0.x. 32181 - Fix code used to find strings within buffers, when those strings 32182 are not in the first chunk of the buffer. Bugfix on 0.2.0.x. 32183 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x. 32184 - Add a new __HashedControlSessionPassword option for controllers 32185 to use for one-off session password hashes that shouldn't get 32186 saved to disk by SAVECONF --- Vidalia users were accumulating a 32187 pile of HashedControlPassword lines in their torrc files, one for 32188 each time they had restarted Tor and then clicked Save. Make Tor 32189 automatically convert "HashedControlPassword" to this new option but 32190 only when it's given on the command line. Partial fix for bug 586. 32191 32192 o Minor features (performance): 32193 - Tune parameters for cell pool allocation to minimize amount of 32194 RAM overhead used. 32195 - Add OpenBSD malloc code from phk as an optional malloc 32196 replacement on Linux: some glibc libraries do very poorly 32197 with Tor's memory allocation patterns. Pass 32198 --enable-openbsd-malloc to get the replacement malloc code. 32199 - Add a --with-tcmalloc option to the configure script to link 32200 against tcmalloc (if present). Does not yet search for 32201 non-system include paths. 32202 - Stop imposing an arbitrary maximum on the number of file descriptors 32203 used for busy servers. Bug reported by Olaf Selke; patch from 32204 Sebastian Hahn. 32205 32206 o Minor features (other): 32207 - When SafeLogging is disabled, log addresses along with all TLS 32208 errors. 32209 - When building with --enable-gcc-warnings, check for whether Apple's 32210 warning "-Wshorten-64-to-32" is available. 32211 - Add a --passphrase-fd argument to the tor-gencert command for 32212 scriptability. 32213 32214 o Minor bugfixes (memory leaks and code problems): 32215 - We were leaking a file descriptor if Tor started with a zero-length 32216 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2. 32217 - Detect size overflow in zlib code. Reported by Justin Ferguson and 32218 Dan Kaminsky. 32219 - We were comparing the raw BridgePassword entry with a base64'ed 32220 version of it, when handling a "/tor/networkstatus-bridges" 32221 directory request. Now compare correctly. Noticed by Veracode. 32222 - Recover from bad tracked-since value in MTBF-history file. 32223 Should fix bug 537. 32224 - Alter the code that tries to recover from unhandled write 32225 errors, to not try to flush onto a socket that's given us 32226 unhandled errors. Bugfix on 0.1.2.x. 32227 - Make Unix controlsockets work correctly on OpenBSD. Patch from 32228 tup. Bugfix on 0.2.0.3-alpha. 32229 32230 o Minor bugfixes (other): 32231 - If we have an extra-info document for our server, always make 32232 it available on the control port, even if we haven't gotten 32233 a copy of it from an authority yet. Patch from mwenge. 32234 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c. 32235 - Directory mirrors no longer include a guess at the client's IP 32236 address if the connection appears to be coming from the same /24 32237 network; it was producing too many wrong guesses. 32238 - Make the new hidden service code respect the SafeLogging setting. 32239 Bugfix on 0.2.0.x. Patch from Karsten. 32240 - When starting as an authority, do not overwrite all certificates 32241 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606. 32242 - If we're trying to flush the last bytes on a connection (for 32243 example, when answering a directory request), reset the 32244 time-to-give-up timeout every time we manage to write something 32245 on the socket. Bugfix on 0.1.2.x. 32246 - Change the behavior of "getinfo status/good-server-descriptor" 32247 so it doesn't return failure when any authority disappears. 32248 - Even though the man page said that "TrackHostExits ." should 32249 work, nobody had ever implemented it. Bugfix on 0.1.0.x. 32250 - Report TLS "zero return" case as a "clean close" and "IO error" 32251 as a "close". Stop calling closes "unexpected closes": existing 32252 Tors don't use SSL_close(), so having a connection close without 32253 the TLS shutdown handshake is hardly unexpected. 32254 - Send NAMESERVER_STATUS messages for a single failed nameserver 32255 correctly. 32256 32257 o Code simplifications and refactoring: 32258 - Remove the tor_strpartition function: its logic was confused, 32259 and it was only used for one thing that could be implemented far 32260 more easily. 32261 32262 32263Changes in version 0.2.0.19-alpha - 2008-02-09 32264 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS 32265 handshake, makes path selection for relays more secure and IP address 32266 guessing more robust, and generally fixes a lot of bugs in preparation 32267 for calling the 0.2.0 branch stable. 32268 32269 o Major features: 32270 - Do not include recognizeable strings in the commonname part of 32271 Tor's x509 certificates. 32272 32273 o Major bugfixes: 32274 - If we're a relay, avoid picking ourselves as an introduction point, 32275 a rendezvous point, or as the final hop for internal circuits. Bug 32276 reported by taranis and lodger. Bugfix on 0.1.2.x. 32277 - Patch from "Andrew S. Lists" to catch when we contact a directory 32278 mirror at IP address X and he says we look like we're coming from 32279 IP address X. Bugfix on 0.1.2.x. 32280 32281 o Minor features (security): 32282 - Be more paranoid about overwriting sensitive memory on free(), 32283 as a defensive programming tactic to ensure forward secrecy. 32284 32285 o Minor features (directory authority): 32286 - Actually validate the options passed to AuthDirReject, 32287 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit. 32288 - Reject router descriptors with out-of-range bandwidthcapacity or 32289 bandwidthburst values. 32290 32291 o Minor features (controller): 32292 - Reject controller commands over 1MB in length. This keeps rogue 32293 processes from running us out of memory. 32294 32295 o Minor features (misc): 32296 - Give more descriptive well-formedness errors for out-of-range 32297 hidden service descriptor/protocol versions. 32298 - Make memory debugging information describe more about history 32299 of cell allocation, so we can help reduce our memory use. 32300 32301 o Deprecated features (controller): 32302 - The status/version/num-versioning and status/version/num-concurring 32303 GETINFO options are no longer useful in the v3 directory protocol: 32304 treat them as deprecated, and warn when they're used. 32305 32306 o Minor bugfixes: 32307 - When our consensus networkstatus has been expired for a while, stop 32308 being willing to build circuits using it. Fixes bug 401. Bugfix 32309 on 0.1.2.x. 32310 - Directory caches now fetch certificates from all authorities 32311 listed in a networkstatus consensus, even when they do not 32312 recognize them. Fixes bug 571. Bugfix on 0.2.0.x. 32313 - When connecting to a bridge without specifying its key, insert 32314 the connection into the identity-to-connection map as soon as 32315 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x. 32316 - Detect versions of OS X where malloc_good_size() is present in the 32317 library but never actually declared. Resolves bug 587. Bugfix 32318 on 0.2.0.x. 32319 - Stop incorrectly truncating zlib responses to directory authority 32320 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x. 32321 - Stop recommending that every server operator send mail to tor-ops. 32322 Resolves bug 597. Bugfix on 0.1.2.x. 32323 - Don't trigger an assert if we start a directory authority with a 32324 private IP address (like 127.0.0.1). 32325 - Avoid possible failures when generating a directory with routers 32326 with over-long versions strings, or too many flags set. Bugfix 32327 on 0.1.2.x. 32328 - If an attempt to launch a DNS resolve request over the control 32329 port fails because we have overrun the limit on the number of 32330 connections, tell the controller that the request has failed. 32331 - Avoid using too little bandwidth when our clock skips a few 32332 seconds. Bugfix on 0.1.2.x. 32333 - Fix shell error when warning about missing packages in configure 32334 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x. 32335 - Do not become confused when receiving a spurious VERSIONS-like 32336 cell from a confused v1 client. Bugfix on 0.2.0.x. 32337 - Re-fetch v2 (as well as v0) rendezvous descriptors when all 32338 introduction points for a hidden service have failed. Patch from 32339 Karsten Loesing. Bugfix on 0.2.0.x. 32340 32341 o Code simplifications and refactoring: 32342 - Remove some needless generality from cpuworker code, for improved 32343 type-safety. 32344 - Stop overloading the circuit_t.onionskin field for both "onionskin 32345 from a CREATE cell that we are waiting for a cpuworker to be 32346 assigned" and "onionskin from an EXTEND cell that we are going to 32347 send to an OR as soon as we are connected". Might help with bug 600. 32348 - Add an in-place version of aes_crypt() so that we can avoid doing a 32349 needless memcpy() call on each cell payload. 32350 32351 32352Changes in version 0.2.0.18-alpha - 2008-01-25 32353 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC, 32354 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options 32355 that can warn or reject connections to ports generally associated with 32356 vulnerable-plaintext protocols. 32357 32358 o New directory authorities: 32359 - Set up dannenberg (run by CCC) as the sixth v3 directory 32360 authority. 32361 32362 o Major bugfixes: 32363 - Fix a major memory leak when attempting to use the v2 TLS 32364 handshake code. Bugfix on 0.2.0.x; fixes bug 589. 32365 - We accidentally enabled the under-development v2 TLS handshake 32366 code, which was causing log entries like "TLS error while 32367 renegotiating handshake". Disable it again. Resolves bug 590. 32368 - We were computing the wrong Content-Length: header for directory 32369 responses that need to be compressed on the fly, causing clients 32370 asking for those items to always fail. Bugfix on 0.2.0.x; partially 32371 fixes bug 593. 32372 32373 o Major features: 32374 - Avoid going directly to the directory authorities even if you're a 32375 relay, if you haven't found yourself reachable yet or if you've 32376 decided not to advertise your dirport yet. Addresses bug 556. 32377 - If we've gone 12 hours since our last bandwidth check, and we 32378 estimate we have less than 50KB bandwidth capacity but we could 32379 handle more, do another bandwidth test. 32380 - New config options WarnPlaintextPorts and RejectPlaintextPorts so 32381 Tor can warn and/or refuse connections to ports commonly used with 32382 vulnerable-plaintext protocols. Currently we warn on ports 23, 32383 109, 110, and 143, but we don't reject any. 32384 32385 o Minor bugfixes: 32386 - When we setconf ClientOnly to 1, close any current OR and Dir 32387 listeners. Reported by mwenge. 32388 - When we get a consensus that's been signed by more people than 32389 we expect, don't log about it; it's not a big deal. Reported 32390 by Kyle Williams. 32391 32392 o Minor features: 32393 - Don't answer "/tor/networkstatus-bridges" directory requests if 32394 the request isn't encrypted. 32395 - Make "ClientOnly 1" config option disable directory ports too. 32396 - Patches from Karsten Loesing to make v2 hidden services more 32397 robust: work even when there aren't enough HSDir relays available; 32398 retry when a v2 rend desc fetch fails; but don't retry if we 32399 already have a usable v0 rend desc. 32400 32401 32402Changes in version 0.2.0.17-alpha - 2008-01-17 32403 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops). 32404 32405 o Compile fixes: 32406 - Make the tor-gencert man page get included correctly in the tarball. 32407 32408 32409Changes in version 0.2.0.16-alpha - 2008-01-17 32410 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten 32411 Loesing, and generally cleans up a lot of features and minor bugs. 32412 32413 o New directory authorities: 32414 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory 32415 authority. 32416 32417 o Major performance improvements: 32418 - Switch our old ring buffer implementation for one more like that 32419 used by free Unix kernels. The wasted space in a buffer with 1mb 32420 of data will now be more like 8k than 1mb. The new implementation 32421 also avoids realloc();realloc(); patterns that can contribute to 32422 memory fragmentation. 32423 32424 o Minor features: 32425 - Configuration files now accept C-style strings as values. This 32426 helps encode characters not allowed in the current configuration 32427 file format, such as newline or #. Addresses bug 557. 32428 - Although we fixed bug 539 (where servers would send HTTP status 503 32429 responses _and_ send a body too), there are still servers out 32430 there that haven't upgraded. Therefore, make clients parse such 32431 bodies when they receive them. 32432 - When we're not serving v2 directory information, there is no reason 32433 to actually keep any around. Remove the obsolete files and directory 32434 on startup if they are very old and we aren't going to serve them. 32435 32436 o Minor performance improvements: 32437 - Reference-count and share copies of address policy entries; only 5% 32438 of them were actually distinct. 32439 - Never walk through the list of logs if we know that no log is 32440 interested in a given message. 32441 32442 o Minor bugfixes: 32443 - When an authority has not signed a consensus, do not try to 32444 download a nonexistent "certificate with key 00000000". Bugfix 32445 on 0.2.0.x. Fixes bug 569. 32446 - Fix a rare assert error when we're closing one of our threads: 32447 use a mutex to protect the list of logs, so we never write to the 32448 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare 32449 bug 575, which is kind of the revenge of bug 222. 32450 - Patch from Karsten Loesing to complain less at both the client 32451 and the relay when a relay used to have the HSDir flag but doesn't 32452 anymore, and we try to upload a hidden service descriptor. 32453 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on 32454 0.2.0.15-alpha. 32455 - Do not try to download missing certificates until we have tried 32456 to check our fallback consensus. Fixes bug 583. 32457 - Make bridges round reported GeoIP stats info up to the nearest 32458 estimate, not down. Now we can distinguish between "0 people from 32459 this country" and "1 person from this country". 32460 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2. 32461 - Avoid possible segfault if key generation fails in 32462 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0. 32463 - Avoid segfault in the case where a badly behaved v2 versioning 32464 directory sends a signed networkstatus with missing client-versions. 32465 Bugfix on 0.1.2. 32466 - Avoid segfaults on certain complex invocations of 32467 router_get_by_hexdigest(). Bugfix on 0.1.2. 32468 - Correct bad index on array access in parse_http_time(). Bugfix 32469 on 0.2.0. 32470 - Fix possible bug in vote generation when server versions are present 32471 but client versions are not. 32472 - Fix rare bug on REDIRECTSTREAM control command when called with no 32473 port set: it could erroneously report an error when none had 32474 happened. 32475 - Avoid bogus crash-prone, leak-prone tor_realloc when we're 32476 compressing large objects and find ourselves with more than 4k 32477 left over. Bugfix on 0.2.0. 32478 - Fix a small memory leak when setting up a hidden service. 32479 - Fix a few memory leaks that could in theory happen under bizarre 32480 error conditions. 32481 - Fix an assert if we post a general-purpose descriptor via the 32482 control port but that descriptor isn't mentioned in our current 32483 network consensus. Bug reported by Jon McLachlan; bugfix on 32484 0.2.0.9-alpha. 32485 32486 o Minor features (controller): 32487 - Get NS events working again. Patch from tup. 32488 - The GETCONF command now escapes and quotes configuration values 32489 that don't otherwise fit into the torrc file. 32490 - The SETCONF command now handles quoted values correctly. 32491 32492 o Minor features (directory authorities): 32493 - New configuration options to override default maximum number of 32494 servers allowed on a single IP address. This is important for 32495 running a test network on a single host. 32496 - Actually implement the -s option to tor-gencert. 32497 - Add a manual page for tor-gencert. 32498 32499 o Minor features (bridges): 32500 - Bridge authorities no longer serve bridge descriptors over 32501 unencrypted connections. 32502 32503 o Minor features (other): 32504 - Add hidden services and DNSPorts to the list of things that make 32505 Tor accept that it has running ports. Change starting Tor with no 32506 ports from a fatal error to a warning; we might change it back if 32507 this turns out to confuse anybody. Fixes bug 579. 32508 32509 32510Changes in version 0.1.2.19 - 2008-01-17 32511 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default 32512 exit policy a little bit more conservative so it's safer to run an 32513 exit relay on a home system, and fixes a variety of smaller issues. 32514 32515 o Security fixes: 32516 - Exit policies now reject connections that are addressed to a 32517 relay's public (external) IP address too, unless 32518 ExitPolicyRejectPrivate is turned off. We do this because too 32519 many relays are running nearby to services that trust them based 32520 on network address. 32521 32522 o Major bugfixes: 32523 - When the clock jumps forward a lot, do not allow the bandwidth 32524 buckets to become negative. Fixes bug 544. 32525 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t 32526 on every successful resolve. Reported by Mike Perry. 32527 - Purge old entries from the "rephist" database and the hidden 32528 service descriptor database even when DirPort is zero. 32529 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir" 32530 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are 32531 crashing or mis-answering these requests. 32532 - When we decide to send a 503 response to a request for servers, do 32533 not then also send the server descriptors: this defeats the whole 32534 purpose. Fixes bug 539. 32535 32536 o Minor bugfixes: 32537 - Changing the ExitPolicyRejectPrivate setting should cause us to 32538 rebuild our server descriptor. 32539 - Fix handling of hex nicknames when answering controller requests for 32540 networkstatus by name, or when deciding whether to warn about 32541 unknown routers in a config option. (Patch from mwenge.) 32542 - Fix a couple of hard-to-trigger autoconf problems that could result 32543 in really weird results on platforms whose sys/types.h files define 32544 nonstandard integer types. 32545 - Don't try to create the datadir when running --verify-config or 32546 --hash-password. Resolves bug 540. 32547 - If we were having problems getting a particular descriptor from the 32548 directory caches, and then we learned about a new descriptor for 32549 that router, we weren't resetting our failure count. Reported 32550 by lodger. 32551 - Although we fixed bug 539 (where servers would send HTTP status 503 32552 responses _and_ send a body too), there are still servers out there 32553 that haven't upgraded. Therefore, make clients parse such bodies 32554 when they receive them. 32555 - Run correctly on systems where rlim_t is larger than unsigned long. 32556 This includes some 64-bit systems. 32557 - Run correctly on platforms (like some versions of OS X 10.5) where 32558 the real limit for number of open files is OPEN_FILES, not rlim_max 32559 from getrlimit(RLIMIT_NOFILES). 32560 - Avoid a spurious free on base64 failure. 32561 - Avoid segfaults on certain complex invocations of 32562 router_get_by_hexdigest(). 32563 - Fix rare bug on REDIRECTSTREAM control command when called with no 32564 port set: it could erroneously report an error when none had 32565 happened. 32566 32567 32568Changes in version 0.2.0.15-alpha - 2007-12-25 32569 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the 32570 features added in 0.2.0.13-alpha. 32571 32572 o Major bugfixes: 32573 - Fix several remotely triggerable asserts based on DirPort requests 32574 for a v2 or v3 networkstatus object before we were prepared. This 32575 was particularly bad for 0.2.0.13 and later bridge relays, who 32576 would never have a v2 networkstatus and would thus always crash 32577 when used. Bugfixes on 0.2.0.x. 32578 - Estimate the v3 networkstatus size more accurately, rather than 32579 estimating it at zero bytes and giving it artificially high priority 32580 compared to other directory requests. Bugfix on 0.2.0.x. 32581 32582 o Minor bugfixes: 32583 - Fix configure.in logic for cross-compilation. 32584 - When we load a bridge descriptor from the cache, and it was 32585 previously unreachable, mark it as retriable so we won't just 32586 ignore it. Also, try fetching a new copy immediately. Bugfixes 32587 on 0.2.0.13-alpha. 32588 - The bridge GeoIP stats were counting other relays, for example 32589 self-reachability and authority-reachability tests. 32590 32591 o Minor features: 32592 - Support compilation to target iPhone; patch from cjacker huang. 32593 To build for iPhone, pass the --enable-iphone option to configure. 32594 32595 32596Changes in version 0.2.0.14-alpha - 2007-12-23 32597 o Major bugfixes: 32598 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh 32599 without a datadirectory from a previous Tor install. Reported 32600 by Zax. 32601 - Fix a crash when we fetch a descriptor that turns out to be 32602 unexpected (it used to be in our networkstatus when we started 32603 fetching it, but it isn't in our current networkstatus), and we 32604 aren't using bridges. Bugfix on 0.2.0.x. 32605 - Fix a crash when accessing hidden services: it would work the first 32606 time you use a given introduction point for your service, but 32607 on subsequent requests we'd be using garbage memory. Fixed by 32608 Karsten Loesing. Bugfix on 0.2.0.13-alpha. 32609 - Fix a crash when we load a bridge descriptor from disk but we don't 32610 currently have a Bridge line for it in our torrc. Bugfix on 32611 0.2.0.13-alpha. 32612 32613 o Major features: 32614 - If bridge authorities set BridgePassword, they will serve a 32615 snapshot of known bridge routerstatuses from their DirPort to 32616 anybody who knows that password. Unset by default. 32617 32618 o Minor bugfixes: 32619 - Make the unit tests build again. 32620 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work. 32621 - Make PublishServerDescriptor default to 1, so the default doesn't 32622 have to change as we invent new directory protocol versions. 32623 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to 32624 be included unless sys/time.h is already included. Fixes 32625 bug 553. Bugfix on 0.2.0.x. 32626 - If we receive a general-purpose descriptor and then receive an 32627 identical bridge-purpose descriptor soon after, don't discard 32628 the next one as a duplicate. 32629 32630 o Minor features: 32631 - If BridgeRelay is set to 1, then the default for 32632 PublishServerDescriptor is now "bridge" rather than "v2,v3". 32633 - If the user sets RelayBandwidthRate but doesn't set 32634 RelayBandwidthBurst, then make them equal rather than erroring out. 32635 32636 32637Changes in version 0.2.0.13-alpha - 2007-12-21 32638 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff 32639 Goodell, fixes many more bugs, and adds a lot of infrastructure for 32640 upcoming features. 32641 32642 o New directory authorities: 32643 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory 32644 authority. 32645 32646 o Major bugfixes: 32647 - Only update guard status (usable / not usable) once we have 32648 enough directory information. This was causing us to always pick 32649 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was 32650 causing us to discard all our guards on startup if we hadn't been 32651 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448. 32652 - Purge old entries from the "rephist" database and the hidden 32653 service descriptor databases even when DirPort is zero. Bugfix 32654 on 0.1.2.x. 32655 - We were ignoring our RelayBandwidthRate for the first 30 seconds 32656 after opening a circuit -- even a relayed circuit. Bugfix on 32657 0.2.0.3-alpha. 32658 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir" 32659 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are 32660 crashing or mis-answering these types of requests. 32661 - Relays were publishing their server descriptor to v1 and v2 32662 directory authorities, but they didn't try publishing to v3-only 32663 authorities. Fix this; and also stop publishing to v1 authorities. 32664 Bugfix on 0.2.0.x. 32665 - When we were reading router descriptors from cache, we were ignoring 32666 the annotations -- so for example we were reading in bridge-purpose 32667 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha. 32668 - When we decided to send a 503 response to a request for servers, we 32669 were then also sending the server descriptors: this defeats the 32670 whole purpose. Fixes bug 539; bugfix on 0.1.2.x. 32671 32672 o Major features: 32673 - Bridge relays now behave like clients with respect to time 32674 intervals for downloading new consensus documents -- otherwise they 32675 stand out. Bridge users now wait until the end of the interval, 32676 so their bridge relay will be sure to have a new consensus document. 32677 - Three new config options (AlternateDirAuthority, 32678 AlternateBridgeAuthority, and AlternateHSAuthority) that let the 32679 user selectively replace the default directory authorities by type, 32680 rather than the all-or-nothing replacement that DirServer offers. 32681 - Tor can now be configured to read a GeoIP file from disk in one 32682 of two formats. This can be used by controllers to map IP addresses 32683 to countries. Eventually, it may support exit-by-country. 32684 - When possible, bridge relays remember which countries users 32685 are coming from, and report aggregate information in their 32686 extra-info documents, so that the bridge authorities can learn 32687 where Tor is blocked. 32688 - Bridge directory authorities now do reachability testing on the 32689 bridges they know. They provide router status summaries to the 32690 controller via "getinfo ns/purpose/bridge", and also dump summaries 32691 to a file periodically. 32692 - Stop fetching directory info so aggressively if your DirPort is 32693 on but your ORPort is off; stop fetching v2 dir info entirely. 32694 You can override these choices with the new FetchDirInfoEarly 32695 config option. 32696 32697 o Minor bugfixes: 32698 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network 32699 consensus documents when there are too many relays at a single 32700 IP address. Now clear it in v2 network status documents too, and 32701 also clear it in routerinfo_t when the relay is no longer listed 32702 in the relevant networkstatus document. 32703 - Don't crash if we get an unexpected value for the 32704 PublishServerDescriptor config option. Reported by Matt Edman; 32705 bugfix on 0.2.0.9-alpha. 32706 - Our new v2 hidden service descriptor format allows descriptors 32707 that have no introduction points. But Tor crashed when we tried 32708 to build a descriptor with no intro points (and it would have 32709 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch 32710 by Karsten Loesing. 32711 - Fix building with dmalloc 5.5.2 with glibc. 32712 - Reject uploaded descriptors and extrainfo documents if they're 32713 huge. Otherwise we'll cache them all over the network and it'll 32714 clog everything up. Reported by Aljosha Judmayer. 32715 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr 32716 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x. 32717 - When the DANGEROUS_VERSION controller status event told us we're 32718 running an obsolete version, it used the string "OLD" to describe 32719 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use 32720 "OBSOLETE" in both cases. Bugfix on 0.1.2.x. 32721 - If we can't expand our list of entry guards (e.g. because we're 32722 using bridges or we have StrictEntryNodes set), don't mark relays 32723 down when they fail a directory request. Otherwise we're too quick 32724 to mark all our entry points down. Bugfix on 0.1.2.x. 32725 - Fix handling of hex nicknames when answering controller requests for 32726 networkstatus by name, or when deciding whether to warn about unknown 32727 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.) 32728 - Fix a couple of hard-to-trigger autoconf problems that could result 32729 in really weird results on platforms whose sys/types.h files define 32730 nonstandard integer types. Bugfix on 0.1.2.x. 32731 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x. 32732 - Don't crash on name lookup when we have no current consensus. Fixes 32733 bug 538; bugfix on 0.2.0.x. 32734 - Only Tors that want to mirror the v2 directory info should 32735 create the "cached-status" directory in their datadir. (All Tors 32736 used to create it.) Bugfix on 0.2.0.9-alpha. 32737 - Directory authorities should only automatically download Extra Info 32738 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x. 32739 32740 o Minor features: 32741 - On the USR1 signal, when dmalloc is in use, log the top 10 memory 32742 consumers. (We already do this on HUP.) 32743 - Authorities and caches fetch the v2 networkstatus documents 32744 less often, now that v3 is encouraged. 32745 - Add a new config option BridgeRelay that specifies you want to 32746 be a bridge relay. Right now the only difference is that it makes 32747 you answer begin_dir requests, and it makes you cache dir info, 32748 even if your DirPort isn't on. 32749 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can 32750 ask about source, timestamp of arrival, purpose, etc. We need 32751 something like this to help Vidalia not do GeoIP lookups on bridge 32752 addresses. 32753 - Allow multiple HashedControlPassword config lines, to support 32754 multiple controller passwords. 32755 - Authorities now decide whether they're authoritative for a given 32756 router based on the router's purpose. 32757 - New config options AuthDirBadDir and AuthDirListBadDirs for 32758 authorities to mark certain relays as "bad directories" in the 32759 networkstatus documents. Also supports the "!baddir" directive in 32760 the approved-routers file. 32761 32762 32763Changes in version 0.2.0.12-alpha - 2007-11-16 32764 This twelfth development snapshot fixes some more build problems as 32765 well as a few minor bugs. 32766 32767 o Compile fixes: 32768 - Make it build on OpenBSD again. Patch from tup. 32769 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes 32770 package-building for Red Hat, OS X, etc. 32771 32772 o Minor bugfixes (on 0.1.2.x): 32773 - Changing the ExitPolicyRejectPrivate setting should cause us to 32774 rebuild our server descriptor. 32775 32776 o Minor bugfixes (on 0.2.0.x): 32777 - When we're lacking a consensus, don't try to perform rendezvous 32778 operations. Reported by Karsten Loesing. 32779 - Fix a small memory leak whenever we decide against using a 32780 newly picked entry guard. Reported by Mike Perry. 32781 - When authorities detected more than two relays running on the same 32782 IP address, they were clearing all the status flags but forgetting 32783 to clear the "hsdir" flag. So clients were being told that a 32784 given relay was the right choice for a v2 hsdir lookup, yet they 32785 never had its descriptor because it was marked as 'not running' 32786 in the consensus. 32787 - If we're trying to fetch a bridge descriptor and there's no way 32788 the bridge authority could help us (for example, we don't know 32789 a digest, or there is no bridge authority), don't be so eager to 32790 fall back to asking the bridge authority. 32791 - If we're using bridges or have strictentrynodes set, and our 32792 chosen exit is in the same family as all our bridges/entry guards, 32793 then be flexible about families. 32794 32795 o Minor features: 32796 - When we negotiate a v2 link-layer connection (not yet implemented), 32797 accept RELAY_EARLY cells and turn them into RELAY cells if we've 32798 negotiated a v1 connection for their next step. Initial code for 32799 proposal 110. 32800 32801 32802Changes in version 0.2.0.11-alpha - 2007-11-12 32803 This eleventh development snapshot fixes some build problems with 32804 the previous snapshot. It also includes a more secure-by-default exit 32805 policy for relays, fixes an enormous memory leak for exit relays, and 32806 fixes another bug where servers were falling out of the directory list. 32807 32808 o Security fixes: 32809 - Exit policies now reject connections that are addressed to a 32810 relay's public (external) IP address too, unless 32811 ExitPolicyRejectPrivate is turned off. We do this because too 32812 many relays are running nearby to services that trust them based 32813 on network address. Bugfix on 0.1.2.x. 32814 32815 o Major bugfixes: 32816 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t 32817 on every successful resolve. Reported by Mike Perry; bugfix 32818 on 0.1.2.x. 32819 - On authorities, never downgrade to old router descriptors simply 32820 because they're listed in the consensus. This created a catch-22 32821 where we wouldn't list a new descriptor because there was an 32822 old one in the consensus, and we couldn't get the new one in the 32823 consensus because we wouldn't list it. Possible fix for bug 548. 32824 Also, this might cause bug 543 to appear on authorities; if so, 32825 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha. 32826 32827 o Packaging fixes on 0.2.0.10-alpha: 32828 - We were including instructions about what to do with the 32829 src/config/fallback-consensus file, but we weren't actually 32830 including it in the tarball. Disable all of that for now. 32831 32832 o Minor features: 32833 - Allow people to say PreferTunnelledDirConns rather than 32834 PreferTunneledDirConns, for those alternate-spellers out there. 32835 32836 o Minor bugfixes: 32837 - Don't reevaluate all the information from our consensus document 32838 just because we've downloaded a v2 networkstatus that we intend 32839 to cache. Fixes bug 545; bugfix on 0.2.0.x. 32840 32841 32842Changes in version 0.2.0.10-alpha - 2007-11-10 32843 This tenth development snapshot adds a third v3 directory authority 32844 run by Mike Perry, adds most of Karsten Loesing's new hidden service 32845 descriptor format, fixes a bad crash bug and new bridge bugs introduced 32846 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation, 32847 fixes some minor memory leaks in previous 0.2.0.x snapshots, and 32848 addresses many more minor issues. 32849 32850 o New directory authorities: 32851 - Set up ides (run by Mike Perry) as the third v3 directory authority. 32852 32853 o Major features: 32854 - Allow tunnelled directory connections to ask for an encrypted 32855 "begin_dir" connection or an anonymized "uses a full Tor circuit" 32856 connection independently. Now we can make anonymized begin_dir 32857 connections for (e.g.) more secure hidden service posting and 32858 fetching. 32859 - More progress on proposal 114: code from Karsten Loesing to 32860 implement new hidden service descriptor format. 32861 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to 32862 accommodate the growing number of servers that use the default 32863 and are reaching it. 32864 - Directory authorities use a new formula for selecting which nodes 32865 to advertise as Guards: they must be in the top 7/8 in terms of 32866 how long we have known about them, and above the median of those 32867 nodes in terms of weighted fractional uptime. 32868 - Make "not enough dir info yet" warnings describe *why* Tor feels 32869 it doesn't have enough directory info yet. 32870 32871 o Major bugfixes: 32872 - Stop servers from crashing if they set a Family option (or 32873 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported 32874 by Fabian Keil. 32875 - Make bridge users work again -- the move to v3 directories in 32876 0.2.0.9-alpha had introduced a number of bugs that made bridges 32877 no longer work for clients. 32878 - When the clock jumps forward a lot, do not allow the bandwidth 32879 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544. 32880 32881 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha): 32882 - When the consensus lists a router descriptor that we previously were 32883 mirroring, but that we considered non-canonical, reload the 32884 descriptor as canonical. This fixes bug 543 where Tor servers 32885 would start complaining after a few days that they don't have 32886 enough directory information to build a circuit. 32887 - Consider replacing the current consensus when certificates arrive 32888 that make the pending consensus valid. Previously, we were only 32889 considering replacement when the new certs _didn't_ help. 32890 - Fix an assert error on startup if we didn't already have the 32891 consensus and certs cached in our datadirectory: we were caching 32892 the consensus in consensus_waiting_for_certs but then free'ing it 32893 right after. 32894 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad 32895 Request) if we need more v3 certs but we've already got pending 32896 requests for all of them. 32897 - Correctly back off from failing certificate downloads. Fixes 32898 bug 546. 32899 - Authorities don't vote on the Running flag if they have been running 32900 for less than 30 minutes themselves. Fixes bug 547, where a newly 32901 started authority would vote that everyone was down. 32902 32903 o New requirements: 32904 - Drop support for OpenSSL version 0.9.6. Just about nobody was using 32905 it, it had no AES, and it hasn't seen any security patches since 32906 2004. 32907 32908 o Minor features: 32909 - Clients now hold circuitless TLS connections open for 1.5 times 32910 MaxCircuitDirtiness (15 minutes), since it is likely that they'll 32911 rebuild a new circuit over them within that timeframe. Previously, 32912 they held them open only for KeepalivePeriod (5 minutes). 32913 - Use "If-Modified-Since" to avoid retrieving consensus 32914 networkstatuses that we already have. 32915 - When we have no consensus, check FallbackNetworkstatusFile (defaults 32916 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way 32917 we start knowing some directory caches. 32918 - When we receive a consensus from the future, warn about skew. 32919 - Improve skew reporting: try to give the user a better log message 32920 about how skewed they are, and how much this matters. 32921 - When we have a certificate for an authority, believe that 32922 certificate's claims about the authority's IP address. 32923 - New --quiet command-line option to suppress the default console log. 32924 Good in combination with --hash-password. 32925 - Authorities send back an X-Descriptor-Not-New header in response to 32926 an accepted-but-discarded descriptor upload. Partially implements 32927 fix for bug 535. 32928 - Make the log message for "tls error. breaking." more useful. 32929 - Better log messages about certificate downloads, to attempt to 32930 track down the second incarnation of bug 546. 32931 32932 o Minor features (bridges): 32933 - If bridge users set UpdateBridgesFromAuthority, but the digest 32934 they ask for is a 404 from the bridge authority, they now fall 32935 back to trying the bridge directly. 32936 - Bridges now use begin_dir to publish their server descriptor to 32937 the bridge authority, even when they haven't set TunnelDirConns. 32938 32939 o Minor features (controller): 32940 - When reporting clock skew, and we know that the clock is _at least 32941 as skewed_ as some value, but we don't know the actual value, 32942 report the value as a "minimum skew." 32943 32944 o Utilities: 32945 - Update linux-tor-prio.sh script to allow QoS based on the uid of 32946 the Tor process. Patch from Marco Bonetti with tweaks from Mike 32947 Perry. 32948 32949 o Minor bugfixes: 32950 - Refuse to start if both ORPort and UseBridges are set. Bugfix 32951 on 0.2.0.x, suggested by Matt Edman. 32952 - Don't stop fetching descriptors when FetchUselessDescriptors is 32953 set, even if we stop asking for circuits. Bugfix on 0.1.2.x; 32954 reported by tup and ioerror. 32955 - Better log message on vote from unknown authority. 32956 - Don't log "Launching 0 request for 0 router" message. 32957 32958 o Minor bugfixes (memory leaks): 32959 - Stop leaking memory every time we parse a v3 certificate. Bugfix 32960 on 0.2.0.1-alpha. 32961 - Stop leaking memory every time we load a v3 certificate. Bugfix 32962 on 0.2.0.1-alpha. Fixes bug 536. 32963 - Stop leaking a cached networkstatus on exit. Bugfix on 32964 0.2.0.3-alpha. 32965 - Stop leaking voter information every time we free a consensus. 32966 Bugfix on 0.2.0.3-alpha. 32967 - Stop leaking signed data every time we check a voter signature. 32968 Bugfix on 0.2.0.3-alpha. 32969 - Stop leaking a signature every time we fail to parse a consensus or 32970 a vote. Bugfix on 0.2.0.3-alpha. 32971 - Stop leaking v2_download_status_map on shutdown. Bugfix on 32972 0.2.0.9-alpha. 32973 - Stop leaking conn->nickname every time we make a connection to a 32974 Tor relay without knowing its expected identity digest (e.g. when 32975 using bridges). Bugfix on 0.2.0.3-alpha. 32976 32977 - Minor bugfixes (portability): 32978 - Run correctly on platforms where rlim_t is larger than unsigned 32979 long, and/or where the real limit for number of open files is 32980 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In 32981 particular, these may be needed for OS X 10.5. 32982 32983 32984Changes in version 0.1.2.18 - 2007-10-28 32985 Tor 0.1.2.18 fixes many problems including crash bugs, problems with 32986 hidden service introduction that were causing huge delays, and a big 32987 bug that was causing some servers to disappear from the network status 32988 lists for a few hours each day. 32989 32990 o Major bugfixes (crashes): 32991 - If a connection is shut down abruptly because of something that 32992 happened inside connection_flushed_some(), do not call 32993 connection_finished_flushing(). Should fix bug 451: 32994 "connection_stop_writing: Assertion conn->write_event failed" 32995 Bugfix on 0.1.2.7-alpha. 32996 - Fix possible segfaults in functions called from 32997 rend_process_relay_cell(). 32998 32999 o Major bugfixes (hidden services): 33000 - Hidden services were choosing introduction points uniquely by 33001 hexdigest, but when constructing the hidden service descriptor 33002 they merely wrote the (potentially ambiguous) nickname. 33003 - Clients now use the v2 intro format for hidden service 33004 connections: they specify their chosen rendezvous point by identity 33005 digest rather than by (potentially ambiguous) nickname. These 33006 changes could speed up hidden service connections dramatically. 33007 33008 o Major bugfixes (other): 33009 - Stop publishing a new server descriptor just because we get a 33010 HUP signal. This led (in a roundabout way) to some servers getting 33011 dropped from the networkstatus lists for a few hours each day. 33012 - When looking for a circuit to cannibalize, consider family as well 33013 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced 33014 circuit cannibalization). 33015 - When a router wasn't listed in a new networkstatus, we were leaving 33016 the flags for that router alone -- meaning it remained Named, 33017 Running, etc -- even though absence from the networkstatus means 33018 that it shouldn't be considered to exist at all anymore. Now we 33019 clear all the flags for routers that fall out of the networkstatus 33020 consensus. Fixes bug 529. 33021 33022 o Minor bugfixes: 33023 - Don't try to access (or alter) the state file when running 33024 --list-fingerprint or --verify-config or --hash-password. Resolves 33025 bug 499. 33026 - When generating information telling us how to extend to a given 33027 router, do not try to include the nickname if it is 33028 absent. Resolves bug 467. 33029 - Fix a user-triggerable segfault in expand_filename(). (There isn't 33030 a way to trigger this remotely.) 33031 - When sending a status event to the controller telling it that an 33032 OR address is reachable, set the port correctly. (Previously we 33033 were reporting the dir port.) 33034 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO 33035 command. Bugfix on 0.1.2.17. 33036 - When loading bandwidth history, do not believe any information in 33037 the future. Fixes bug 434. 33038 - When loading entry guard information, do not believe any information 33039 in the future. 33040 - When we have our clock set far in the future and generate an 33041 onion key, then re-set our clock to be correct, we should not stop 33042 the onion key from getting rotated. 33043 - On some platforms, accept() can return a broken address. Detect 33044 this more quietly, and deal accordingly. Fixes bug 483. 33045 - It's not actually an error to find a non-pending entry in the DNS 33046 cache when canceling a pending resolve. Don't log unless stuff 33047 is fishy. Resolves bug 463. 33048 - Don't reset trusted dir server list when we set a configuration 33049 option. Patch from Robert Hogan. 33050 - Don't try to create the datadir when running --verify-config or 33051 --hash-password. Resolves bug 540. 33052 33053 33054Changes in version 0.2.0.9-alpha - 2007-10-24 33055 This ninth development snapshot switches clients to the new v3 directory 33056 system; allows servers to be listed in the network status even when they 33057 have the same nickname as a registered server; and fixes many other 33058 bugs including a big one that was causing some servers to disappear 33059 from the network status lists for a few hours each day. 33060 33061 o Major features (directory system): 33062 - Clients now download v3 consensus networkstatus documents instead 33063 of v2 networkstatus documents. Clients and caches now base their 33064 opinions about routers on these consensus documents. Clients only 33065 download router descriptors listed in the consensus. 33066 - Authorities now list servers who have the same nickname as 33067 a different named server, but list them with a new flag, 33068 "Unnamed". Now we can list servers that happen to pick the same 33069 nickname as a server that registered two years ago and then 33070 disappeared. Partially implements proposal 122. 33071 - If the consensus lists a router as "Unnamed", the name is assigned 33072 to a different router: do not identify the router by that name. 33073 Partially implements proposal 122. 33074 - Authorities can now come to a consensus on which method to use to 33075 compute the consensus. This gives us forward compatibility. 33076 33077 o Major bugfixes: 33078 - Stop publishing a new server descriptor just because we HUP or 33079 when we find our DirPort to be reachable but won't actually publish 33080 it. New descriptors without any real changes are dropped by the 33081 authorities, and can screw up our "publish every 18 hours" schedule. 33082 Bugfix on 0.1.2.x. 33083 - When a router wasn't listed in a new networkstatus, we were leaving 33084 the flags for that router alone -- meaning it remained Named, 33085 Running, etc -- even though absence from the networkstatus means 33086 that it shouldn't be considered to exist at all anymore. Now we 33087 clear all the flags for routers that fall out of the networkstatus 33088 consensus. Fixes bug 529; bugfix on 0.1.2.x. 33089 - Fix awful behavior in DownloadExtraInfo option where we'd fetch 33090 extrainfo documents and then discard them immediately for not 33091 matching the latest router. Bugfix on 0.2.0.1-alpha. 33092 33093 o Minor features (v3 directory protocol): 33094 - Allow tor-gencert to generate a new certificate without replacing 33095 the signing key. 33096 - Allow certificates to include an address. 33097 - When we change our directory-cache settings, reschedule all voting 33098 and download operations. 33099 - Reattempt certificate downloads immediately on failure, as long as 33100 we haven't failed a threshold number of times yet. 33101 - Delay retrying consensus downloads while we're downloading 33102 certificates to verify the one we just got. Also, count getting a 33103 consensus that we already have (or one that isn't valid) as a failure, 33104 and count failing to get the certificates after 20 minutes as a 33105 failure. 33106 - Build circuits and download descriptors even if our consensus is a 33107 little expired. (This feature will go away once authorities are 33108 more reliable.) 33109 33110 o Minor features (router descriptor cache): 33111 - If we find a cached-routers file that's been sitting around for more 33112 than 28 days unmodified, then most likely it's a leftover from 33113 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good 33114 routers anyway. 33115 - When we (as a cache) download a descriptor because it was listed 33116 in a consensus, remember when the consensus was supposed to expire, 33117 and don't expire the descriptor until then. 33118 33119 o Minor features (performance): 33120 - Call routerlist_remove_old_routers() much less often. This should 33121 speed startup, especially on directory caches. 33122 - Don't try to launch new descriptor downloads quite so often when we 33123 already have enough directory information to build circuits. 33124 - Base64 decoding was actually showing up on our profile when parsing 33125 the initial descriptor file; switch to an in-process all-at-once 33126 implementation that's about 3.5x times faster than calling out to 33127 OpenSSL. 33128 33129 o Minor features (compilation): 33130 - Detect non-ASCII platforms (if any still exist) and refuse to 33131 build there: some of our code assumes that 'A' is 65 and so on. 33132 33133 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x): 33134 - Make the "next period" votes into "current period" votes immediately 33135 after publishing the consensus; avoid a heisenbug that made them 33136 stick around indefinitely. 33137 - When we discard a vote as a duplicate, do not report this as 33138 an error. 33139 - Treat missing v3 keys or certificates as an error when running as a 33140 v3 directory authority. 33141 - When we're configured to be a v3 authority, but we're only listed 33142 as a non-v3 authority in our DirServer line for ourself, correct 33143 the listing. 33144 - If an authority doesn't have a qualified hostname, just put 33145 its address in the vote. This fixes the problem where we referred to 33146 "moria on moria:9031." 33147 - Distinguish between detached signatures for the wrong period, and 33148 detached signatures for a divergent vote. 33149 - Fix a small memory leak when computing a consensus. 33150 - When there's no consensus, we were forming a vote every 30 33151 minutes, but writing the "valid-after" line in our vote based 33152 on our configured V3AuthVotingInterval: so unless the intervals 33153 matched up, we immediately rejected our own vote because it didn't 33154 start at the voting interval that caused us to construct a vote. 33155 33156 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x): 33157 - Delete unverified-consensus when the real consensus is set. 33158 - Consider retrying a consensus networkstatus fetch immediately 33159 after one fails: don't wait 60 seconds to notice. 33160 - When fetching a consensus as a cache, wait until a newer consensus 33161 should exist before trying to replace the current one. 33162 - Use a more forgiving schedule for retrying failed consensus 33163 downloads than for other types. 33164 33165 o Minor bugfixes (other directory issues): 33166 - Correct the implementation of "download votes by digest." Bugfix on 33167 0.2.0.8-alpha. 33168 - Authorities no longer send back "400 you're unreachable please fix 33169 it" errors to Tor servers that aren't online all the time. We're 33170 supposed to tolerate these servers now. Bugfix on 0.1.2.x. 33171 33172 o Minor bugfixes (controller): 33173 - Don't reset trusted dir server list when we set a configuration 33174 option. Patch from Robert Hogan; bugfix on 0.1.2.x. 33175 - Respond to INT and TERM SIGNAL commands before we execute the 33176 signal, in case the signal shuts us down. We had a patch in 33177 0.1.2.1-alpha that tried to do this by queueing the response on 33178 the connection's buffer before shutting down, but that really 33179 isn't the same thing at all. Bug located by Matt Edman. 33180 33181 o Minor bugfixes (misc): 33182 - Correctly check for bad options to the "PublishServerDescriptor" 33183 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman. 33184 - Stop leaking memory on failing case of base32_decode, and make 33185 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha. 33186 - Don't try to download extrainfo documents when we're trying to 33187 fetch enough directory info to build a circuit: having enough 33188 info should get priority. Bugfix on 0.2.0.x. 33189 - Don't complain that "your server has not managed to confirm that its 33190 ports are reachable" if we haven't been able to build any circuits 33191 yet. Bug found by spending four hours without a v3 consensus. Bugfix 33192 on 0.1.2.x. 33193 - Detect the reason for failing to mmap a descriptor file we just 33194 wrote, and give a more useful log message. Fixes bug 533. Bugfix 33195 on 0.1.2.x. 33196 33197 o Code simplifications and refactoring: 33198 - Remove support for the old bw_accounting file: we've been storing 33199 bandwidth accounting information in the state file since 33200 0.1.2.5-alpha. This may result in bandwidth accounting errors 33201 if you try to upgrade from 0.1.1.x or earlier, or if you try to 33202 downgrade to 0.1.1.x or earlier. 33203 - New convenience code to locate a file within the DataDirectory. 33204 - Move non-authority functionality out of dirvote.c. 33205 - Refactor the arguments for router_pick_{directory_|trusteddir}server 33206 so that they all take the same named flags. 33207 33208 o Utilities 33209 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide 33210 Unix users an easy way to script their Tor process (e.g. by 33211 adjusting bandwidth based on the time of the day). 33212 33213 33214Changes in version 0.2.0.8-alpha - 2007-10-12 33215 This eighth development snapshot fixes a crash bug that's been bothering 33216 us since February 2007, lets bridge authorities store a list of bridge 33217 descriptors they've seen, gets v3 directory voting closer to working, 33218 starts caching v3 directory consensus documents on directory mirrors, 33219 and fixes a variety of smaller issues including some minor memory leaks. 33220 33221 o Major features (router descriptor cache): 33222 - Store routers in a file called cached-descriptors instead of in 33223 cached-routers. Initialize cached-descriptors from cached-routers 33224 if the old format is around. The new format allows us to store 33225 annotations along with descriptors. 33226 - Use annotations to record the time we received each descriptor, its 33227 source, and its purpose. 33228 - Disable the SETROUTERPURPOSE controller command: it is now 33229 obsolete. 33230 - Controllers should now specify cache=no or cache=yes when using 33231 the +POSTDESCRIPTOR command. 33232 - Bridge authorities now write bridge descriptors to disk, meaning 33233 we can export them to other programs and begin distributing them 33234 to blocked users. 33235 33236 o Major features (directory authorities): 33237 - When a v3 authority is missing votes or signatures, it now tries 33238 to fetch them. 33239 - Directory authorities track weighted fractional uptime as well as 33240 weighted mean-time-between failures. WFU is suitable for deciding 33241 whether a node is "usually up", while MTBF is suitable for deciding 33242 whether a node is "likely to stay up." We need both, because 33243 "usually up" is a good requirement for guards, while "likely to 33244 stay up" is a good requirement for long-lived connections. 33245 33246 o Major features (v3 directory system): 33247 - Caches now download v3 network status documents as needed, 33248 and download the descriptors listed in them. 33249 - All hosts now attempt to download and keep fresh v3 authority 33250 certificates, and re-attempt after failures. 33251 - More internal-consistency checks for vote parsing. 33252 33253 o Major bugfixes (crashes): 33254 - If a connection is shut down abruptly because of something that 33255 happened inside connection_flushed_some(), do not call 33256 connection_finished_flushing(). Should fix bug 451. Bugfix on 33257 0.1.2.7-alpha. 33258 33259 o Major bugfixes (performance): 33260 - Fix really bad O(n^2) performance when parsing a long list of 33261 routers: Instead of searching the entire list for an "extra-info " 33262 string which usually wasn't there, once for every routerinfo 33263 we read, just scan lines forward until we find one we like. 33264 Bugfix on 0.2.0.1. 33265 - When we add data to a write buffer in response to the data on that 33266 write buffer getting low because of a flush, do not consider the 33267 newly added data as a candidate for immediate flushing, but rather 33268 make it wait until the next round of writing. Otherwise, we flush 33269 and refill recursively, and a single greedy TLS connection can 33270 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha. 33271 33272 o Minor features (v3 authority system): 33273 - Add more ways for tools to download the votes that lead to the 33274 current consensus. 33275 - Send a 503 when low on bandwidth and a vote, consensus, or 33276 certificate is requested. 33277 - If-modified-since is now implemented properly for all kinds of 33278 certificate requests. 33279 33280 o Minor bugfixes (network statuses): 33281 - Tweak the implementation of proposal 109 slightly: allow at most 33282 two Tor servers on the same IP address, except if it's the location 33283 of a directory authority, in which case allow five. Bugfix on 33284 0.2.0.3-alpha. 33285 33286 o Minor bugfixes (controller): 33287 - When sending a status event to the controller telling it that an 33288 OR address is reachable, set the port correctly. (Previously we 33289 were reporting the dir port.) Bugfix on 0.1.2.x. 33290 33291 o Minor bugfixes (v3 directory system): 33292 - Fix logic to look up a cert by its signing key digest. Bugfix on 33293 0.2.0.7-alpha. 33294 - Only change the reply to a vote to "OK" if it's not already 33295 set. This gets rid of annoying "400 OK" log messages, which may 33296 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha. 33297 - When we get a valid consensus, recompute the voting schedule. 33298 - Base the valid-after time of a vote on the consensus voting 33299 schedule, not on our preferred schedule. 33300 - Make the return values and messages from signature uploads and 33301 downloads more sensible. 33302 - Fix a memory leak when serving votes and consensus documents, and 33303 another when serving certificates. 33304 33305 o Minor bugfixes (performance): 33306 - Use a slightly simpler string hashing algorithm (copying Python's 33307 instead of Java's) and optimize our digest hashing algorithm to take 33308 advantage of 64-bit platforms and to remove some possibly-costly 33309 voodoo. 33310 - Fix a minor memory leak whenever we parse guards from our state 33311 file. Bugfix on 0.2.0.7-alpha. 33312 - Fix a minor memory leak whenever we write out a file. Bugfix on 33313 0.2.0.7-alpha. 33314 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO 33315 command. Bugfix on 0.2.0.5-alpha. 33316 33317 o Minor bugfixes (portability): 33318 - On some platforms, accept() can return a broken address. Detect 33319 this more quietly, and deal accordingly. Fixes bug 483. 33320 - Stop calling tor_strlower() on uninitialized memory in some cases. 33321 Bugfix in 0.2.0.7-alpha. 33322 33323 o Minor bugfixes (usability): 33324 - Treat some 403 responses from directory servers as INFO rather than 33325 WARN-severity events. 33326 - It's not actually an error to find a non-pending entry in the DNS 33327 cache when canceling a pending resolve. Don't log unless stuff is 33328 fishy. Resolves bug 463. 33329 33330 o Minor bugfixes (anonymity): 33331 - Never report that we've used more bandwidth than we're willing to 33332 relay: it leaks how much non-relay traffic we're using. Resolves 33333 bug 516. 33334 - When looking for a circuit to cannibalize, consider family as well 33335 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced 33336 circuit cannibalization). 33337 33338 o Code simplifications and refactoring: 33339 - Make a bunch of functions static. Remove some dead code. 33340 - Pull out about a third of the really big routerlist.c; put it in a 33341 new module, networkstatus.c. 33342 - Merge the extra fields in local_routerstatus_t back into 33343 routerstatus_t: we used to need one routerstatus_t for each 33344 authority's opinion, plus a local_routerstatus_t for the locally 33345 computed consensus opinion. To save space, we put the locally 33346 modified fields into local_routerstatus_t, and only the common 33347 stuff into routerstatus_t. But once v3 directories are in use, 33348 clients and caches will no longer need to hold authority opinions; 33349 thus, the rationale for keeping the types separate is now gone. 33350 - Make the code used to reschedule and reattempt downloads more 33351 uniform. 33352 - Turn all 'Are we a directory server/mirror?' logic into a call to 33353 dirserver_mode(). 33354 - Remove the code to generate the oldest (v1) directory format. 33355 The code has been disabled since 0.2.0.5-alpha. 33356 33357 33358Changes in version 0.2.0.7-alpha - 2007-09-21 33359 This seventh development snapshot makes bridges work again, makes bridge 33360 authorities work for the first time, fixes two huge performance flaws 33361 in hidden services, and fixes a variety of minor issues. 33362 33363 o New directory authorities: 33364 - Set up moria1 and tor26 as the first v3 directory authorities. See 33365 doc/spec/dir-spec.txt for details on the new directory design. 33366 33367 o Major bugfixes (crashes): 33368 - Fix possible segfaults in functions called from 33369 rend_process_relay_cell(). Bugfix on 0.1.2.x. 33370 33371 o Major bugfixes (bridges): 33372 - Fix a bug that made servers send a "404 Not found" in response to 33373 attempts to fetch their server descriptor. This caused Tor servers 33374 to take many minutes to establish reachability for their DirPort, 33375 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha. 33376 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge 33377 users configure that and specify a bridge with an identity 33378 fingerprint, now they will lookup the bridge descriptor at the 33379 default bridge authority via a one-hop tunnel, but once circuits 33380 are established they will switch to a three-hop tunnel for later 33381 connections to the bridge authority. Bugfix in 0.2.0.3-alpha. 33382 33383 o Major bugfixes (hidden services): 33384 - Hidden services were choosing introduction points uniquely by 33385 hexdigest, but when constructing the hidden service descriptor 33386 they merely wrote the (potentially ambiguous) nickname. 33387 - Clients now use the v2 intro format for hidden service 33388 connections: they specify their chosen rendezvous point by identity 33389 digest rather than by (potentially ambiguous) nickname. Both 33390 are bugfixes on 0.1.2.x, and they could speed up hidden service 33391 connections dramatically. Thanks to Karsten Loesing. 33392 33393 o Minor features (security): 33394 - As a client, do not believe any server that tells us that an 33395 address maps to an internal address space. 33396 - Make it possible to enable HashedControlPassword and 33397 CookieAuthentication at the same time. 33398 33399 o Minor features (guard nodes): 33400 - Tag every guard node in our state file with the version that 33401 we believe added it, or with our own version if we add it. This way, 33402 if a user temporarily runs an old version of Tor and then switches 33403 back to a new one, she doesn't automatically lose her guards. 33404 33405 o Minor features (speed): 33406 - When implementing AES counter mode, update only the portions of the 33407 counter buffer that need to change, and don't keep separate 33408 network-order and host-order counters when they are the same (i.e., 33409 on big-endian hosts.) 33410 33411 o Minor features (controller): 33412 - Accept LF instead of CRLF on controller, since some software has a 33413 hard time generating real Internet newlines. 33414 - Add GETINFO values for the server status events 33415 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from 33416 Robert Hogan. 33417 33418 o Removed features: 33419 - Routers no longer include bandwidth-history lines in their 33420 descriptors; this information is already available in extra-info 33421 documents, and including it in router descriptors took up 60% 33422 (!) of compressed router descriptor downloads. Completes 33423 implementation of proposal 104. 33424 - Remove the contrib scripts ExerciseServer.py, PathDemo.py, 33425 and TorControl.py, as they use the old v0 controller protocol, 33426 and are obsoleted by TorFlow anyway. 33427 - Drop support for v1 rendezvous descriptors, since we never used 33428 them anyway, and the code has probably rotted by now. Based on 33429 patch from Karsten Loesing. 33430 - On OSX, stop warning the user that kqueue support in libevent is 33431 "experimental", since it seems to have worked fine for ages. 33432 33433 o Minor bugfixes: 33434 - When generating information telling us how to extend to a given 33435 router, do not try to include the nickname if it is absent. Fixes 33436 bug 467. Bugfix on 0.2.0.3-alpha. 33437 - Fix a user-triggerable (but not remotely-triggerable) segfault 33438 in expand_filename(). Bugfix on 0.1.2.x. 33439 - Fix a memory leak when freeing incomplete requests from DNSPort. 33440 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha. 33441 - Don't try to access (or alter) the state file when running 33442 --list-fingerprint or --verify-config or --hash-password. (Resolves 33443 bug 499.) Bugfix on 0.1.2.x. 33444 - Servers used to decline to publish their DirPort if their 33445 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth 33446 were below a threshold. Now they only look at BandwidthRate and 33447 RelayBandwidthRate. Bugfix on 0.1.2.x. 33448 - Remove an optimization in the AES counter-mode code that assumed 33449 that the counter never exceeded 2^68. When the counter can be set 33450 arbitrarily as an IV (as it is by Karsten's new hidden services 33451 code), this assumption no longer holds. Bugfix on 0.1.2.x. 33452 - Resume listing "AUTHORITY" flag for authorities in network status. 33453 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode. 33454 33455 o Code simplifications and refactoring: 33456 - Revamp file-writing logic so we don't need to have the entire 33457 contents of a file in memory at once before we write to disk. Tor, 33458 meet stdio. 33459 - Turn "descriptor store" into a full-fledged type. 33460 - Move all NT services code into a separate source file. 33461 - Unify all code that computes medians, percentile elements, etc. 33462 - Get rid of a needless malloc when parsing address policies. 33463 33464 33465Changes in version 0.1.2.17 - 2007-08-30 33466 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS 33467 X bundles. Vidalia 0.0.14 makes authentication required for the 33468 ControlPort in the default configuration, which addresses important 33469 security risks. Everybody who uses Vidalia (or another controller) 33470 should upgrade. 33471 33472 In addition, this Tor update fixes major load balancing problems with 33473 path selection, which should speed things up a lot once many people 33474 have upgraded. 33475 33476 o Major bugfixes (security): 33477 - We removed support for the old (v0) control protocol. It has been 33478 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has 33479 become more of a headache than it's worth. 33480 33481 o Major bugfixes (load balancing): 33482 - When choosing nodes for non-guard positions, weight guards 33483 proportionally less, since they already have enough load. Patch 33484 from Mike Perry. 33485 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This 33486 will allow fast Tor servers to get more attention. 33487 - When we're upgrading from an old Tor version, forget our current 33488 guards and pick new ones according to the new weightings. These 33489 three load balancing patches could raise effective network capacity 33490 by a factor of four. Thanks to Mike Perry for measurements. 33491 33492 o Major bugfixes (stream expiration): 33493 - Expire not-yet-successful application streams in all cases if 33494 they've been around longer than SocksTimeout. Right now there are 33495 some cases where the stream will live forever, demanding a new 33496 circuit every 15 seconds. Fixes bug 454; reported by lodger. 33497 33498 o Minor features (controller): 33499 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it 33500 is valid before any authentication has been received. It tells 33501 a controller what kind of authentication is expected, and what 33502 protocol is spoken. Implements proposal 119. 33503 33504 o Minor bugfixes (performance): 33505 - Save on most routerlist_assert_ok() calls in routerlist.c, thus 33506 greatly speeding up loading cached-routers from disk on startup. 33507 - Disable sentinel-based debugging for buffer code: we squashed all 33508 the bugs that this was supposed to detect a long time ago, and now 33509 its only effect is to change our buffer sizes from nice powers of 33510 two (which platform mallocs tend to like) to values slightly over 33511 powers of two (which make some platform mallocs sad). 33512 33513 o Minor bugfixes (misc): 33514 - If exit bandwidth ever exceeds one third of total bandwidth, then 33515 use the correct formula to weight exit nodes when choosing paths. 33516 Based on patch from Mike Perry. 33517 - Choose perfectly fairly among routers when choosing by bandwidth and 33518 weighting by fraction of bandwidth provided by exits. Previously, we 33519 would choose with only approximate fairness, and correct ourselves 33520 if we ran off the end of the list. 33521 - If we require CookieAuthentication but we fail to write the 33522 cookie file, we would warn but not exit, and end up in a state 33523 where no controller could authenticate. Now we exit. 33524 - If we require CookieAuthentication, stop generating a new cookie 33525 every time we change any piece of our config. 33526 - Refuse to start with certain directory authority keys, and 33527 encourage people using them to stop. 33528 - Terminate multi-line control events properly. Original patch 33529 from tup. 33530 - Fix a minor memory leak when we fail to find enough suitable 33531 servers to choose a circuit. 33532 - Stop leaking part of the descriptor when we run into a particularly 33533 unparseable piece of it. 33534 33535 33536Changes in version 0.2.0.6-alpha - 2007-08-26 33537 This sixth development snapshot features a new Vidalia version in the 33538 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for 33539 the ControlPort in the default configuration, which addresses important 33540 security risks. 33541 33542 In addition, this snapshot fixes major load balancing problems 33543 with path selection, which should speed things up a lot once many 33544 people have upgraded. The directory authorities also use a new 33545 mean-time-between-failure approach to tracking which servers are stable, 33546 rather than just looking at the most recent uptime. 33547 33548 o New directory authorities: 33549 - Set up Tonga as the default bridge directory authority. 33550 33551 o Major features: 33552 - Directory authorities now track servers by weighted 33553 mean-times-between-failures. When we have 4 or more days of data, 33554 use measured MTBF rather than declared uptime to decide whether 33555 to call a router Stable. Implements proposal 108. 33556 33557 o Major bugfixes (load balancing): 33558 - When choosing nodes for non-guard positions, weight guards 33559 proportionally less, since they already have enough load. Patch 33560 from Mike Perry. 33561 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This 33562 will allow fast Tor servers to get more attention. 33563 - When we're upgrading from an old Tor version, forget our current 33564 guards and pick new ones according to the new weightings. These 33565 three load balancing patches could raise effective network capacity 33566 by a factor of four. Thanks to Mike Perry for measurements. 33567 33568 o Major bugfixes (descriptor parsing): 33569 - Handle unexpected whitespace better in malformed descriptors. Bug 33570 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x. 33571 33572 o Minor features: 33573 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack" 33574 GETINFO for Torstat to use until it can switch to using extrainfos. 33575 - Optionally (if built with -DEXPORTMALLINFO) export the output 33576 of mallinfo via http, as tor/mallinfo.txt. Only accessible 33577 from localhost. 33578 33579 o Minor bugfixes: 33580 - Do not intermix bridge routers with controller-added 33581 routers. (Bugfix on 0.2.0.x) 33582 - Do not fail with an assert when accept() returns an unexpected 33583 address family. Addresses but does not wholly fix bug 483. (Bugfix 33584 on 0.2.0.x) 33585 - Let directory authorities startup even when they can't generate 33586 a descriptor immediately, e.g. because they don't know their 33587 address. 33588 - Stop putting the authentication cookie in a file called "0" 33589 in your working directory if you don't specify anything for the 33590 new CookieAuthFile option. Reported by Matt Edman. 33591 - Make it possible to read the PROTOCOLINFO response in a way that 33592 conforms to our control-spec. Reported by Matt Edman. 33593 - Fix a minor memory leak when we fail to find enough suitable 33594 servers to choose a circuit. Bugfix on 0.1.2.x. 33595 - Stop leaking part of the descriptor when we run into a particularly 33596 unparseable piece of it. Bugfix on 0.1.2.x. 33597 - Unmap the extrainfo cache file on exit. 33598 33599 33600Changes in version 0.2.0.5-alpha - 2007-08-19 33601 This fifth development snapshot fixes compilation on Windows again; 33602 fixes an obnoxious client-side bug that slowed things down and put 33603 extra load on the network; gets us closer to using the v3 directory 33604 voting scheme; makes it easier for Tor controllers to use cookie-based 33605 authentication; and fixes a variety of other bugs. 33606 33607 o Removed features: 33608 - Version 1 directories are no longer generated in full. Instead, 33609 authorities generate and serve "stub" v1 directories that list 33610 no servers. This will stop Tor versions 0.1.0.x and earlier from 33611 working, but (for security reasons) nobody should be running those 33612 versions anyway. 33613 33614 o Major bugfixes (compilation, 0.2.0.x): 33615 - Try to fix Win32 compilation again: improve checking for IPv6 types. 33616 - Try to fix MSVC compilation: build correctly on platforms that do 33617 not define s6_addr16 or s6_addr32. 33618 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui 33619 Zhou. 33620 33621 o Major bugfixes (stream expiration): 33622 - Expire not-yet-successful application streams in all cases if 33623 they've been around longer than SocksTimeout. Right now there are 33624 some cases where the stream will live forever, demanding a new 33625 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454; 33626 reported by lodger. 33627 33628 o Minor features (directory servers): 33629 - When somebody requests a list of statuses or servers, and we have 33630 none of those, return a 404 rather than an empty 200. 33631 33632 o Minor features (directory voting): 33633 - Store v3 consensus status consensuses on disk, and reload them 33634 on startup. 33635 33636 o Minor features (security): 33637 - Warn about unsafe ControlPort configurations. 33638 - Refuse to start with certain directory authority keys, and 33639 encourage people using them to stop. 33640 33641 o Minor features (controller): 33642 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it 33643 is valid before any authentication has been received. It tells 33644 a controller what kind of authentication is expected, and what 33645 protocol is spoken. Implements proposal 119. 33646 - New config option CookieAuthFile to choose a new location for the 33647 cookie authentication file, and config option 33648 CookieAuthFileGroupReadable to make it group-readable. 33649 33650 o Minor features (unit testing): 33651 - Add command-line arguments to unit-test executable so that we can 33652 invoke any chosen test from the command line rather than having 33653 to run the whole test suite at once; and so that we can turn on 33654 logging for the unit tests. 33655 33656 o Minor bugfixes (on 0.1.2.x): 33657 - If we require CookieAuthentication but we fail to write the 33658 cookie file, we would warn but not exit, and end up in a state 33659 where no controller could authenticate. Now we exit. 33660 - If we require CookieAuthentication, stop generating a new cookie 33661 every time we change any piece of our config. 33662 - When loading bandwidth history, do not believe any information in 33663 the future. Fixes bug 434. 33664 - When loading entry guard information, do not believe any information 33665 in the future. 33666 - When we have our clock set far in the future and generate an 33667 onion key, then re-set our clock to be correct, we should not stop 33668 the onion key from getting rotated. 33669 - Clean up torrc sample config file. 33670 - Do not automatically run configure from autogen.sh. This 33671 non-standard behavior tended to annoy people who have built other 33672 programs. 33673 33674 o Minor bugfixes (on 0.2.0.x): 33675 - Fix a bug with AutomapHostsOnResolve that would always cause 33676 the second request to fail. Bug reported by Kate. Bugfix on 33677 0.2.0.3-alpha. 33678 - Fix a bug in ADDRMAP controller replies that would sometimes 33679 try to print a NULL. Patch from tup. 33680 - Read v3 directory authority keys from the right location. 33681 - Numerous bugfixes to directory voting code. 33682 33683 33684Changes in version 0.1.2.16 - 2007-08-01 33685 Tor 0.1.2.16 fixes a critical security vulnerability that allows a 33686 remote attacker in certain situations to rewrite the user's torrc 33687 configuration file. This can completely compromise anonymity of users 33688 in most configurations, including those running the Vidalia bundles, 33689 TorK, etc. Or worse. 33690 33691 o Major security fixes: 33692 - Close immediately after missing authentication on control port; 33693 do not allow multiple authentication attempts. 33694 33695 33696Changes in version 0.2.0.4-alpha - 2007-08-01 33697 This fourth development snapshot fixes a critical security vulnerability 33698 for most users, specifically those running Vidalia, TorK, etc. Everybody 33699 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha. 33700 33701 o Major security fixes: 33702 - Close immediately after missing authentication on control port; 33703 do not allow multiple authentication attempts. 33704 33705 o Major bugfixes (compilation): 33706 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already 33707 defined there. 33708 33709 o Minor features (performance): 33710 - Be even more aggressive about releasing RAM from small 33711 empty buffers. Thanks to our free-list code, this shouldn't be too 33712 performance-intensive. 33713 - Disable sentinel-based debugging for buffer code: we squashed all 33714 the bugs that this was supposed to detect a long time ago, and 33715 now its only effect is to change our buffer sizes from nice 33716 powers of two (which platform mallocs tend to like) to values 33717 slightly over powers of two (which make some platform mallocs sad). 33718 - Log malloc statistics from mallinfo() on platforms where it 33719 exists. 33720 33721 33722Changes in version 0.2.0.3-alpha - 2007-07-29 33723 This third development snapshot introduces new experimental 33724 blocking-resistance features and a preliminary version of the v3 33725 directory voting design, and includes many other smaller features 33726 and bugfixes. 33727 33728 o Major features: 33729 - The first pieces of our "bridge" design for blocking-resistance 33730 are implemented. People can run bridge directory authorities; 33731 people can run bridges; and people can configure their Tor clients 33732 with a set of bridges to use as the first hop into the Tor network. 33733 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for 33734 details. 33735 - Create listener connections before we setuid to the configured 33736 User and Group. Now non-Windows users can choose port values 33737 under 1024, start Tor as root, and have Tor bind those ports 33738 before it changes to another UID. (Windows users could already 33739 pick these ports.) 33740 - Added a new ConstrainedSockets config option to set SO_SNDBUF and 33741 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running 33742 on "vserver" accounts. (Patch from coderman.) 33743 - Be even more aggressive about separating local traffic from relayed 33744 traffic when RelayBandwidthRate is set. (Refines proposal 111.) 33745 33746 o Major features (experimental): 33747 - First cut of code for "v3 dir voting": directory authorities will 33748 vote on a common network status document rather than each publishing 33749 their own opinion. This code needs more testing and more corner-case 33750 handling before it's ready for use. 33751 33752 o Security fixes: 33753 - Directory authorities now call routers Fast if their bandwidth is 33754 at least 100KB/s, and consider their bandwidth adequate to be a 33755 Guard if it is at least 250KB/s, no matter the medians. This fix 33756 complements proposal 107. [Bugfix on 0.1.2.x] 33757 - Directory authorities now never mark more than 3 servers per IP as 33758 Valid and Running. (Implements proposal 109, by Kevin Bauer and 33759 Damon McCoy.) 33760 - Minor change to organizationName and commonName generation 33761 procedures in TLS certificates during Tor handshakes, to invalidate 33762 some earlier censorware approaches. This is not a long-term 33763 solution, but applying it will give us a bit of time to look into 33764 the epidemiology of countermeasures as they spread. 33765 33766 o Major bugfixes (directory): 33767 - Rewrite directory tokenization code to never run off the end of 33768 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x] 33769 33770 o Minor features (controller): 33771 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can 33772 match requests to applications. (Patch from Robert Hogan.) 33773 - Report address and port correctly on connections to DNSPort. (Patch 33774 from Robert Hogan.) 33775 - Add a RESOLVE command to launch hostname lookups. (Original patch 33776 from Robert Hogan.) 33777 - Add GETINFO status/enough-dir-info to let controllers tell whether 33778 Tor has downloaded sufficient directory information. (Patch 33779 from Tup.) 33780 - You can now use the ControlSocket option to tell Tor to listen for 33781 controller connections on Unix domain sockets on systems that 33782 support them. (Patch from Peter Palfrader.) 33783 - STREAM NEW events are generated for DNSPort requests and for 33784 tunneled directory connections. (Patch from Robert Hogan.) 33785 - New "GETINFO address-mappings/*" command to get address mappings 33786 with expiry information. "addr-mappings/*" is now deprecated. 33787 (Patch from Tup.) 33788 33789 o Minor features (misc): 33790 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch 33791 from croup.) 33792 - The tor-gencert tool for v3 directory authorities now creates all 33793 files as readable to the file creator only, and write-protects 33794 the authority identity key. 33795 - When dumping memory usage, list bytes used in buffer memory 33796 free-lists. 33797 - When running with dmalloc, dump more stats on hup and on exit. 33798 - Directory authorities now fail quickly and (relatively) harmlessly 33799 if they generate a network status document that is somehow 33800 malformed. 33801 33802 o Traffic load balancing improvements: 33803 - If exit bandwidth ever exceeds one third of total bandwidth, then 33804 use the correct formula to weight exit nodes when choosing paths. 33805 (Based on patch from Mike Perry.) 33806 - Choose perfectly fairly among routers when choosing by bandwidth and 33807 weighting by fraction of bandwidth provided by exits. Previously, we 33808 would choose with only approximate fairness, and correct ourselves 33809 if we ran off the end of the list. [Bugfix on 0.1.2.x] 33810 33811 o Performance improvements: 33812 - Be more aggressive with freeing buffer RAM or putting it on the 33813 memory free lists. 33814 - Use Critical Sections rather than Mutexes for synchronizing threads 33815 on win32; Mutexes are heavier-weight, and designed for synchronizing 33816 between processes. 33817 33818 o Deprecated and removed features: 33819 - RedirectExits is now deprecated. 33820 - Stop allowing address masks that do not correspond to bit prefixes. 33821 We have warned about these for a really long time; now it's time 33822 to reject them. (Patch from croup.) 33823 33824 o Minor bugfixes (directory): 33825 - Fix another crash bug related to extra-info caching. (Bug found by 33826 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha] 33827 - Directories no longer return a "304 not modified" when they don't 33828 have the networkstatus the client asked for. Also fix a memory 33829 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha] 33830 - We had accidentally labelled 0.1.2.x directory servers as not 33831 suitable for begin_dir requests, and had labelled no directory 33832 servers as suitable for uploading extra-info documents. [Bugfix 33833 on 0.2.0.1-alpha] 33834 33835 o Minor bugfixes (dns): 33836 - Fix a crash when DNSPort is set more than once. (Patch from Robert 33837 Hogan.) [Bugfix on 0.2.0.2-alpha] 33838 - Add DNSPort connections to the global connection list, so that we 33839 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix 33840 on 0.2.0.2-alpha] 33841 - Fix a dangling reference that could lead to a crash when DNSPort is 33842 changed or closed (Patch from Robert Hogan.) [Bugfix on 33843 0.2.0.2-alpha] 33844 33845 o Minor bugfixes (controller): 33846 - Provide DNS expiry times in GMT, not in local time. For backward 33847 compatibility, ADDRMAP events only provide GMT expiry in an extended 33848 field. "GETINFO address-mappings" always does the right thing. 33849 - Use CRLF line endings properly in NS events. 33850 - Terminate multi-line control events properly. (Original patch 33851 from tup.) [Bugfix on 0.1.2.x-alpha] 33852 - Do not include spaces in SOURCE_ADDR fields in STREAM 33853 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha] 33854 33855 33856Changes in version 0.1.2.15 - 2007-07-17 33857 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related 33858 problems, fixes compilation on BSD, and fixes a variety of other 33859 bugs. Everybody should upgrade. 33860 33861 o Major bugfixes (compilation): 33862 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops. 33863 33864 o Major bugfixes (crashes): 33865 - Try even harder not to dereference the first character after 33866 an mmap(). Reported by lodger. 33867 - Fix a crash bug in directory authorities when we re-number the 33868 routerlist while inserting a new router. 33869 - When the cached-routers file is an even multiple of the page size, 33870 don't run off the end and crash. (Fixes bug 455; based on idea 33871 from croup.) 33872 - Fix eventdns.c behavior on Solaris: It is critical to include 33873 orconfig.h _before_ sys/types.h, so that we can get the expected 33874 definition of _FILE_OFFSET_BITS. 33875 33876 o Major bugfixes (security): 33877 - Fix a possible buffer overrun when using BSD natd support. Bug 33878 found by croup. 33879 - When sending destroy cells from a circuit's origin, don't include 33880 the reason for tearing down the circuit. The spec says we didn't, 33881 and now we actually don't. Reported by lodger. 33882 - Keep streamids from different exits on a circuit separate. This 33883 bug may have allowed other routers on a given circuit to inject 33884 cells into streams. Reported by lodger; fixes bug 446. 33885 - If there's a never-before-connected-to guard node in our list, 33886 never choose any guards past it. This way we don't expand our 33887 guard list unless we need to. 33888 33889 o Minor bugfixes (guard nodes): 33890 - Weight guard selection by bandwidth, so that low-bandwidth nodes 33891 don't get overused as guards. 33892 33893 o Minor bugfixes (directory): 33894 - Correctly count the number of authorities that recommend each 33895 version. Previously, we were under-counting by 1. 33896 - Fix a potential crash bug when we load many server descriptors at 33897 once and some of them make others of them obsolete. Fixes bug 458. 33898 33899 o Minor bugfixes (hidden services): 33900 - Stop tearing down the whole circuit when the user asks for a 33901 connection to a port that the hidden service didn't configure. 33902 Resolves bug 444. 33903 33904 o Minor bugfixes (misc): 33905 - On Windows, we were preventing other processes from reading 33906 cached-routers while Tor was running. Reported by janbar. 33907 - Fix a possible (but very unlikely) bug in picking routers by 33908 bandwidth. Add a log message to confirm that it is in fact 33909 unlikely. Patch from lodger. 33910 - Backport a couple of memory leak fixes. 33911 - Backport miscellaneous cosmetic bugfixes. 33912 33913 33914Changes in version 0.2.0.2-alpha - 2007-06-02 33915 o Major bugfixes on 0.2.0.1-alpha: 33916 - Fix an assertion failure related to servers without extra-info digests. 33917 Resolves bugs 441 and 442. 33918 33919 o Minor features (directory): 33920 - Support "If-Modified-Since" when answering HTTP requests for 33921 directories, running-routers documents, and network-status documents. 33922 (There's no need to support it for router descriptors, since those 33923 are downloaded by descriptor digest.) 33924 33925 o Minor build issues: 33926 - Clear up some MIPSPro compiler warnings. 33927 - When building from a tarball on a machine that happens to have SVK 33928 installed, report the micro-revision as whatever version existed 33929 in the tarball, not as "x". 33930 33931 33932Changes in version 0.2.0.1-alpha - 2007-06-01 33933 This early development snapshot provides new features for people running 33934 Tor as both a client and a server (check out the new RelayBandwidth 33935 config options); lets Tor run as a DNS proxy; and generally moves us 33936 forward on a lot of fronts. 33937 33938 o Major features, server usability: 33939 - New config options RelayBandwidthRate and RelayBandwidthBurst: 33940 a separate set of token buckets for relayed traffic. Right now 33941 relayed traffic is defined as answers to directory requests, and 33942 OR connections that don't have any local circuits on them. 33943 33944 o Major features, client usability: 33945 - A client-side DNS proxy feature to replace the need for 33946 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen 33947 for DNS requests on port 9999, use the Tor network to resolve them 33948 anonymously, and send the reply back like a regular DNS server. 33949 The code still only implements a subset of DNS. 33950 - Make PreferTunneledDirConns and TunnelDirConns work even when 33951 we have no cached directory info. This means Tor clients can now 33952 do all of their connections protected by TLS. 33953 33954 o Major features, performance and efficiency: 33955 - Directory authorities accept and serve "extra info" documents for 33956 routers. These documents contain fields from router descriptors 33957 that aren't usually needed, and that use a lot of excess 33958 bandwidth. Once these fields are removed from router descriptors, 33959 the bandwidth savings should be about 60%. [Partially implements 33960 proposal 104.] 33961 - Servers upload extra-info documents to any authority that accepts 33962 them. Authorities (and caches that have been configured to download 33963 extra-info documents) download them as needed. [Partially implements 33964 proposal 104.] 33965 - Change the way that Tor buffers data that it is waiting to write. 33966 Instead of queueing data cells in an enormous ring buffer for each 33967 client->OR or OR->OR connection, we now queue cells on a separate 33968 queue for each circuit. This lets us use less slack memory, and 33969 will eventually let us be smarter about prioritizing different kinds 33970 of traffic. 33971 - Use memory pools to allocate cells with better speed and memory 33972 efficiency, especially on platforms where malloc() is inefficient. 33973 - Stop reading on edge connections when their corresponding circuit 33974 buffers are full; start again as the circuits empty out. 33975 33976 o Major features, other: 33977 - Add an HSAuthorityRecordStats option that hidden service authorities 33978 can use to track statistics of overall hidden service usage without 33979 logging information that would be very useful to an attacker. 33980 - Start work implementing multi-level keys for directory authorities: 33981 Add a standalone tool to generate key certificates. (Proposal 103.) 33982 33983 o Security fixes: 33984 - Directory authorities now call routers Stable if they have an 33985 uptime of at least 30 days, even if that's not the median uptime 33986 in the network. Implements proposal 107, suggested by Kevin Bauer 33987 and Damon McCoy. 33988 33989 o Minor fixes (resource management): 33990 - Count the number of open sockets separately from the number 33991 of active connection_t objects. This will let us avoid underusing 33992 our allocated connection limit. 33993 - We no longer use socket pairs to link an edge connection to an 33994 anonymous directory connection or a DirPort test connection. 33995 Instead, we track the link internally and transfer the data 33996 in-process. This saves two sockets per "linked" connection (at the 33997 client and at the server), and avoids the nasty Windows socketpair() 33998 workaround. 33999 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k 34000 for every single inactive connection_t. Free items from the 34001 4k/16k-buffer free lists when they haven't been used for a while. 34002 34003 o Minor features (build): 34004 - Make autoconf search for libevent, openssl, and zlib consistently. 34005 - Update deprecated macros in configure.in. 34006 - When warning about missing headers, tell the user to let us 34007 know if the compile succeeds anyway, so we can downgrade the 34008 warning. 34009 - Include the current subversion revision as part of the version 34010 string: either fetch it directly if we're in an SVN checkout, do 34011 some magic to guess it if we're in an SVK checkout, or use 34012 the last-detected version if we're building from a .tar.gz. 34013 Use this version consistently in log messages. 34014 34015 o Minor features (logging): 34016 - Always prepend "Bug: " to any log message about a bug. 34017 - Put a platform string (e.g. "Linux i686") in the startup log 34018 message, so when people paste just their logs, we know if it's 34019 OpenBSD or Windows or what. 34020 - When logging memory usage, break down memory used in buffers by 34021 buffer type. 34022 34023 o Minor features (directory system): 34024 - New config option V2AuthoritativeDirectory that all directory 34025 authorities should set. This will let future authorities choose 34026 not to serve V2 directory information. 34027 - Directory authorities allow multiple router descriptors and/or extra 34028 info documents to be uploaded in a single go. This will make 34029 implementing proposal 104 simpler. 34030 34031 o Minor features (controller): 34032 - Add a new config option __DisablePredictedCircuits designed for 34033 use by the controller, when we don't want Tor to build any circuits 34034 preemptively. 34035 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM, 34036 so we can exit from the middle of the circuit. 34037 - Implement "getinfo status/circuit-established". 34038 - Implement "getinfo status/version/..." so a controller can tell 34039 whether the current version is recommended, and whether any versions 34040 are good, and how many authorities agree. (Patch from shibz.) 34041 34042 o Minor features (hidden services): 34043 - Allow multiple HiddenServicePort directives with the same virtual 34044 port; when they occur, the user is sent round-robin to one 34045 of the target ports chosen at random. Partially fixes bug 393 by 34046 adding limited ad-hoc round-robining. 34047 34048 o Minor features (other): 34049 - More unit tests. 34050 - Add a new AutomapHostsOnResolve option: when it is enabled, any 34051 resolve request for hosts matching a given pattern causes Tor to 34052 generate an internal virtual address mapping for that host. This 34053 allows DNSPort to work sensibly with hidden service users. By 34054 default, .exit and .onion addresses are remapped; the list of 34055 patterns can be reconfigured with AutomapHostsSuffixes. 34056 - Add an "-F" option to tor-resolve to force a resolve for a .onion 34057 address. Thanks to the AutomapHostsOnResolve option, this is no 34058 longer a completely silly thing to do. 34059 - If Tor is invoked from something that isn't a shell (e.g. Vidalia), 34060 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman. 34061 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb, 34062 minus 1 byte: the actual maximum declared bandwidth. 34063 34064 o Removed features: 34065 - Removed support for the old binary "version 0" controller protocol. 34066 This has been deprecated since 0.1.1, and warnings have been issued 34067 since 0.1.2. When we encounter a v0 control message, we now send 34068 back an error and close the connection. 34069 - Remove the old "dns worker" server DNS code: it hasn't been default 34070 since 0.1.2.2-alpha, and all the servers seem to be using the new 34071 eventdns code. 34072 34073 o Minor bugfixes (portability): 34074 - Even though Windows is equally happy with / and \ as path separators, 34075 try to use \ consistently on Windows and / consistently on Unix: it 34076 makes the log messages nicer. 34077 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE. 34078 - Read resolv.conf files correctly on platforms where read() returns 34079 partial results on small file reads. 34080 34081 o Minor bugfixes (directory): 34082 - Correctly enforce that elements of directory objects do not appear 34083 more often than they are allowed to appear. 34084 - When we are reporting the DirServer line we just parsed, we were 34085 logging the second stanza of the key fingerprint, not the first. 34086 34087 o Minor bugfixes (logging): 34088 - When we hit an EOF on a log (probably because we're shutting down), 34089 don't try to remove the log from the list: just mark it as 34090 unusable. (Bulletproofs against bug 222.) 34091 34092 o Minor bugfixes (other): 34093 - In the exitlist script, only consider the most recently published 34094 server descriptor for each server. Also, when the user requests 34095 a list of servers that _reject_ connections to a given address, 34096 explicitly exclude the IPs that also have servers that accept 34097 connections to that address. (Resolves bug 405.) 34098 - Stop allowing hibernating servers to be "stable" or "fast". 34099 - On Windows, we were preventing other processes from reading 34100 cached-routers while Tor was running. (Reported by janbar) 34101 - Make the NodeFamilies config option work. (Reported by 34102 lodger -- it has never actually worked, even though we added it 34103 in Oct 2004.) 34104 - Check return values from pthread_mutex functions. 34105 - Don't save non-general-purpose router descriptors to the disk cache, 34106 because we have no way of remembering what their purpose was when 34107 we restart. 34108 - Add even more asserts to hunt down bug 417. 34109 - Build without verbose warnings even on (not-yet-released) gcc 4.2. 34110 - Fix a possible (but very unlikely) bug in picking routers by bandwidth. 34111 Add a log message to confirm that it is in fact unlikely. 34112 34113 o Minor bugfixes (controller): 34114 - Make 'getinfo fingerprint' return a 551 error if we're not a 34115 server, so we match what the control spec claims we do. Reported 34116 by daejees. 34117 - Fix a typo in an error message when extendcircuit fails that 34118 caused us to not follow the \r\n-based delimiter protocol. Reported 34119 by daejees. 34120 34121 o Code simplifications and refactoring: 34122 - Stop passing around circuit_t and crypt_path_t pointers that are 34123 implicit in other procedure arguments. 34124 - Drop the old code to choke directory connections when the 34125 corresponding OR connections got full: thanks to the cell queue 34126 feature, OR conns don't get full any more. 34127 - Make dns_resolve() handle attaching connections to circuits 34128 properly, so the caller doesn't have to. 34129 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw. 34130 - Keep the connection array as a dynamic smartlist_t, rather than as 34131 a fixed-sized array. This is important, as the number of connections 34132 is becoming increasingly decoupled from the number of sockets. 34133 34134 34135Changes in version 0.1.2.14 - 2007-05-25 34136 Tor 0.1.2.14 changes the addresses of two directory authorities (this 34137 change especially affects those who serve or use hidden services), 34138 and fixes several other crash- and security-related bugs. 34139 34140 o Directory authority changes: 34141 - Two directory authorities (moria1 and moria2) just moved to new 34142 IP addresses. This change will particularly affect those who serve 34143 or use hidden services. 34144 34145 o Major bugfixes (crashes): 34146 - If a directory server runs out of space in the connection table 34147 as it's processing a begin_dir request, it will free the exit stream 34148 but leave it attached to the circuit, leading to unpredictable 34149 behavior. (Reported by seeess, fixes bug 425.) 34150 - Fix a bug in dirserv_remove_invalid() that would cause authorities 34151 to corrupt memory under some really unlikely scenarios. 34152 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.) 34153 - Avoid segfaults when reading from mmaped descriptor file. (Reported 34154 by lodger.) 34155 34156 o Major bugfixes (security): 34157 - When choosing an entry guard for a circuit, avoid using guards 34158 that are in the same family as the chosen exit -- not just guards 34159 that are exactly the chosen exit. (Reported by lodger.) 34160 34161 o Major bugfixes (resource management): 34162 - If a directory authority is down, skip it when deciding where to get 34163 networkstatus objects or descriptors. Otherwise we keep asking 34164 every 10 seconds forever. Fixes bug 384. 34165 - Count it as a failure if we fetch a valid network-status but we 34166 don't want to keep it. Otherwise we'll keep fetching it and keep 34167 not wanting to keep it. Fixes part of bug 422. 34168 - If all of our dirservers have given us bad or no networkstatuses 34169 lately, then stop hammering them once per minute even when we 34170 think they're failed. Fixes another part of bug 422. 34171 34172 o Minor bugfixes: 34173 - Actually set the purpose correctly for descriptors inserted with 34174 purpose=controller. 34175 - When we have k non-v2 authorities in our DirServer config, 34176 we ignored the last k authorities in the list when updating our 34177 network-statuses. 34178 - Correctly back-off from requesting router descriptors that we are 34179 having a hard time downloading. 34180 - Read resolv.conf files correctly on platforms where read() returns 34181 partial results on small file reads. 34182 - Don't rebuild the entire router store every time we get 32K of 34183 routers: rebuild it when the journal gets very large, or when 34184 the gaps in the store get very large. 34185 34186 o Minor features: 34187 - When routers publish SVN revisions in their router descriptors, 34188 authorities now include those versions correctly in networkstatus 34189 documents. 34190 - Warn when using a version of libevent before 1.3b to run a server on 34191 OSX or BSD: these versions interact badly with userspace threads. 34192 34193 34194Changes in version 0.1.2.13 - 2007-04-24 34195 This release features some major anonymity fixes, such as safer path 34196 selection; better client performance; faster bootstrapping, better 34197 address detection, and better DNS support for servers; write limiting as 34198 well as read limiting to make servers easier to run; and a huge pile of 34199 other features and bug fixes. The bundles also ship with Vidalia 0.0.11. 34200 34201 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo 34202 of the Freenode IRC network, remembering his patience and vision for 34203 free speech on the Internet. 34204 34205 o Minor fixes: 34206 - Fix a memory leak when we ask for "all" networkstatuses and we 34207 get one we don't recognize. 34208 - Add more asserts to hunt down bug 417. 34209 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371. 34210 34211 34212Changes in version 0.1.2.12-rc - 2007-03-16 34213 o Major bugfixes: 34214 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve 34215 directory information requested inside Tor connections (i.e. via 34216 begin_dir cells). It only triggered when the same connection was 34217 serving other data at the same time. Reported by seeess. 34218 34219 o Minor bugfixes: 34220 - When creating a circuit via the controller, send a 'launched' 34221 event when we're done, so we follow the spec better. 34222 34223 34224Changes in version 0.1.2.11-rc - 2007-03-15 34225 o Minor bugfixes (controller), reported by daejees: 34226 - Correct the control spec to match how the code actually responds 34227 to 'getinfo addr-mappings/*'. 34228 - The control spec described a GUARDS event, but the code 34229 implemented a GUARD event. Standardize on GUARD, but let people 34230 ask for GUARDS too. 34231 34232 34233Changes in version 0.1.2.10-rc - 2007-03-07 34234 o Major bugfixes (Windows): 34235 - Do not load the NT services library functions (which may not exist) 34236 just to detect if we're a service trying to shut down. Now we run 34237 on Win98 and friends again. 34238 34239 o Minor bugfixes (other): 34240 - Clarify a couple of log messages. 34241 - Fix a misleading socks5 error number. 34242 34243 34244Changes in version 0.1.2.9-rc - 2007-03-02 34245 o Major bugfixes (Windows): 34246 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead 34247 of the usual GCC "%llu". This prevents a bug when saving 64-bit 34248 int configuration values: the high-order 32 bits would get 34249 truncated. In particular, we were being bitten by the default 34250 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400 34251 and maybe also bug 397.) 34252 34253 o Minor bugfixes (performance): 34254 - Use OpenSSL's AES implementation on platforms where it's faster. 34255 This could save us as much as 10% CPU usage. 34256 34257 o Minor bugfixes (server): 34258 - Do not rotate onion key immediately after setting it for the first 34259 time. 34260 34261 o Minor bugfixes (directory authorities): 34262 - Stop calling servers that have been hibernating for a long time 34263 "stable". Also, stop letting hibernating or obsolete servers affect 34264 uptime and bandwidth cutoffs. 34265 - Stop listing hibernating servers in the v1 directory. 34266 34267 o Minor bugfixes (hidden services): 34268 - Upload hidden service descriptors slightly less often, to reduce 34269 load on authorities. 34270 34271 o Minor bugfixes (other): 34272 - Fix an assert that could trigger if a controller quickly set then 34273 cleared EntryNodes. Bug found by Udo van den Heuvel. 34274 - On architectures where sizeof(int)>4, still clamp declarable bandwidth 34275 to INT32_MAX. 34276 - Fix a potential race condition in the rpm installer. Found by 34277 Stefan Nordhausen. 34278 - Try to fix eventdns warnings once and for all: do not treat a dns rcode 34279 of 2 as indicating that the server is completely bad; it sometimes 34280 means that the server is just bad for the request in question. (may fix 34281 the last of bug 326.) 34282 - Disable encrypted directory connections when we don't have a server 34283 descriptor for the destination. We'll get this working again in 34284 the 0.2.0 branch. 34285 34286 34287Changes in version 0.1.2.8-beta - 2007-02-26 34288 o Major bugfixes (crashes): 34289 - Stop crashing when the controller asks us to resetconf more than 34290 one config option at once. (Vidalia 0.0.11 does this.) 34291 - Fix a crash that happened on Win98 when we're given command-line 34292 arguments: don't try to load NT service functions from advapi32.dll 34293 except when we need them. (Bug introduced in 0.1.2.7-alpha; 34294 resolves bug 389.) 34295 - Fix a longstanding obscure crash bug that could occur when 34296 we run out of DNS worker processes. (Resolves bug 390.) 34297 34298 o Major bugfixes (hidden services): 34299 - Correctly detect whether hidden service descriptor downloads are 34300 in-progress. (Suggested by Karsten Loesing; fixes bug 399.) 34301 34302 o Major bugfixes (accounting): 34303 - When we start during an accounting interval before it's time to wake 34304 up, remember to wake up at the correct time. (May fix bug 342.) 34305 34306 o Minor bugfixes (controller): 34307 - Give the controller END_STREAM_REASON_DESTROY events _before_ we 34308 clear the corresponding on_circuit variable, and remember later 34309 that we don't need to send a redundant CLOSED event. Resolves part 34310 3 of bug 367. 34311 - Report events where a resolve succeeded or where we got a socks 34312 protocol error correctly, rather than calling both of them 34313 "INTERNAL". 34314 - Change reported stream target addresses to IP consistently when 34315 we finally get the IP from an exit node. 34316 - Send log messages to the controller even if they happen to be very 34317 long. 34318 34319 o Minor bugfixes (other): 34320 - Display correct results when reporting which versions are 34321 recommended, and how recommended they are. (Resolves bug 383.) 34322 - Improve our estimates for directory bandwidth to be less random: 34323 guess that an unrecognized directory will have the average bandwidth 34324 from all known directories, not that it will have the average 34325 bandwidth from those directories earlier than it on the list. 34326 - If we start a server with ClientOnly 1, then set ClientOnly to 0 34327 and hup, stop triggering an assert based on an empty onion_key. 34328 - On platforms with no working mmap() equivalent, don't warn the 34329 user when cached-routers doesn't exist. 34330 - Warn the user when mmap() [or its equivalent] fails for some reason 34331 other than file-not-found. 34332 - Don't warn the user when cached-routers.new doesn't exist: that's 34333 perfectly fine when starting up for the first time. 34334 - When EntryNodes are configured, rebuild the guard list to contain, 34335 in order: the EntryNodes that were guards before; the rest of the 34336 EntryNodes; the nodes that were guards before. 34337 - Mask out all signals in sub-threads; only the libevent signal 34338 handler should be processing them. This should prevent some crashes 34339 on some machines using pthreads. (Patch from coderman.) 34340 - Fix switched arguments on memset in the implementation of 34341 tor_munmap() for systems with no mmap() call. 34342 - When Tor receives a router descriptor that it asked for, but 34343 no longer wants (because it has received fresh networkstatuses 34344 in the meantime), do not warn the user. Cache the descriptor if 34345 we're a cache; drop it if we aren't. 34346 - Make earlier entry guards _really_ get retried when the network 34347 comes back online. 34348 - On a malformed DNS reply, always give an error to the corresponding 34349 DNS request. 34350 - Build with recent libevents on platforms that do not define the 34351 nonstandard types "u_int8_t" and friends. 34352 34353 o Minor features (controller): 34354 - Warn the user when an application uses the obsolete binary v0 34355 control protocol. We're planning to remove support for it during 34356 the next development series, so it's good to give people some 34357 advance warning. 34358 - Add STREAM_BW events to report per-entry-stream bandwidth 34359 use. (Patch from Robert Hogan.) 34360 - Rate-limit SIGNEWNYM signals in response to controllers that 34361 impolitely generate them for every single stream. (Patch from 34362 mwenge; closes bug 394.) 34363 - Make REMAP stream events have a SOURCE (cache or exit), and 34364 make them generated in every case where we get a successful 34365 connected or resolved cell. 34366 34367 o Minor bugfixes (performance): 34368 - Call router_have_min_dir_info half as often. (This is showing up in 34369 some profiles, but not others.) 34370 - When using GCC, make log_debug never get called at all, and its 34371 arguments never get evaluated, when no debug logs are configured. 34372 (This is showing up in some profiles, but not others.) 34373 34374 o Minor features: 34375 - Remove some never-implemented options. Mark PathlenCoinWeight as 34376 obsolete. 34377 - Implement proposal 106: Stop requiring clients to have well-formed 34378 certificates; stop checking nicknames in certificates. (Clients 34379 have certificates so that they can look like Tor servers, but in 34380 the future we might want to allow them to look like regular TLS 34381 clients instead. Nicknames in certificates serve no purpose other 34382 than making our protocol easier to recognize on the wire.) 34383 - Revise messages on handshake failure again to be even more clear about 34384 which are incoming connections and which are outgoing. 34385 - Discard any v1 directory info that's over 1 month old (for 34386 directories) or over 1 week old (for running-routers lists). 34387 - Do not warn when individual nodes in the configuration's EntryNodes, 34388 ExitNodes, etc are down: warn only when all possible nodes 34389 are down. (Fixes bug 348.) 34390 - Always remove expired routers and networkstatus docs before checking 34391 whether we have enough information to build circuits. (Fixes 34392 bug 373.) 34393 - Put a lower-bound on MaxAdvertisedBandwidth. 34394 34395 34396Changes in version 0.1.2.7-alpha - 2007-02-06 34397 o Major bugfixes (rate limiting): 34398 - Servers decline directory requests much more aggressively when 34399 they're low on bandwidth. Otherwise they end up queueing more and 34400 more directory responses, which can't be good for latency. 34401 - But never refuse directory requests from local addresses. 34402 - Fix a memory leak when sending a 503 response for a networkstatus 34403 request. 34404 - Be willing to read or write on local connections (e.g. controller 34405 connections) even when the global rate limiting buckets are empty. 34406 - If our system clock jumps back in time, don't publish a negative 34407 uptime in the descriptor. Also, don't let the global rate limiting 34408 buckets go absurdly negative. 34409 - Flush local controller connection buffers periodically as we're 34410 writing to them, so we avoid queueing 4+ megabytes of data before 34411 trying to flush. 34412 34413 o Major bugfixes (NT services): 34414 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a 34415 command-line flag so that admins can override the default by saying 34416 "tor --service install --user "SomeUser"". This will not affect 34417 existing installed services. Also, warn the user that the service 34418 will look for its configuration file in the service user's 34419 %appdata% directory. (We can't do the 'hardwire the user's appdata 34420 directory' trick any more, since we may not have read access to that 34421 directory.) 34422 34423 o Major bugfixes (other): 34424 - Previously, we would cache up to 16 old networkstatus documents 34425 indefinitely, if they came from nontrusted authorities. Now we 34426 discard them if they are more than 10 days old. 34427 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew 34428 Del Vecchio). 34429 - Detect and reject malformed DNS responses containing circular 34430 pointer loops. 34431 - If exits are rare enough that we're not marking exits as guards, 34432 ignore exit bandwidth when we're deciding the required bandwidth 34433 to become a guard. 34434 - When we're handling a directory connection tunneled over Tor, 34435 don't fill up internal memory buffers with all the data we want 34436 to tunnel; instead, only add it if the OR connection that will 34437 eventually receive it has some room for it. (This can lead to 34438 slowdowns in tunneled dir connections; a better solution will have 34439 to wait for 0.2.0.) 34440 34441 o Minor bugfixes (dns): 34442 - Add some defensive programming to eventdns.c in an attempt to catch 34443 possible memory-stomping bugs. 34444 - Detect and reject DNS replies containing IPv4 or IPv6 records with 34445 an incorrect number of bytes. (Previously, we would ignore the 34446 extra bytes.) 34447 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles 34448 in the correct order, and doesn't crash. 34449 - Free memory held in recently-completed DNS lookup attempts on exit. 34450 This was not a memory leak, but may have been hiding memory leaks. 34451 - Handle TTL values correctly on reverse DNS lookups. 34452 - Treat failure to parse resolv.conf as an error. 34453 34454 o Minor bugfixes (other): 34455 - Fix crash with "tor --list-fingerprint" (reported by seeess). 34456 - When computing clock skew from directory HTTP headers, consider what 34457 time it was when we finished asking for the directory, not what 34458 time it is now. 34459 - Expire socks connections if they spend too long waiting for the 34460 handshake to finish. Previously we would let them sit around for 34461 days, if the connecting application didn't close them either. 34462 - And if the socks handshake hasn't started, don't send a 34463 "DNS resolve socks failed" handshake reply; just close it. 34464 - Stop using C functions that OpenBSD's linker doesn't like. 34465 - Don't launch requests for descriptors unless we have networkstatuses 34466 from at least half of the authorities. This delays the first 34467 download slightly under pathological circumstances, but can prevent 34468 us from downloading a bunch of descriptors we don't need. 34469 - Do not log IPs with TLS failures for incoming TLS 34470 connections. (Fixes bug 382.) 34471 - If the user asks to use invalid exit nodes, be willing to use 34472 unstable ones. 34473 - Stop using the reserved ac_cv namespace in our configure script. 34474 - Call stat() slightly less often; use fstat() when possible. 34475 - Refactor the way we handle pending circuits when an OR connection 34476 completes or fails, in an attempt to fix a rare crash bug. 34477 - Only rewrite a conn's address based on X-Forwarded-For: headers 34478 if it's a parseable public IP address; and stop adding extra quotes 34479 to the resulting address. 34480 34481 o Major features: 34482 - Weight directory requests by advertised bandwidth. Now we can 34483 let servers enable write limiting but still allow most clients to 34484 succeed at their directory requests. (We still ignore weights when 34485 choosing a directory authority; I hope this is a feature.) 34486 34487 o Minor features: 34488 - Create a new file ReleaseNotes which was the old ChangeLog. The 34489 new ChangeLog file now includes the summaries for all development 34490 versions too. 34491 - Check for addresses with invalid characters at the exit as well 34492 as at the client, and warn less verbosely when they fail. You can 34493 override this by setting ServerDNSAllowNonRFC953Addresses to 1. 34494 - Adapt a patch from goodell to let the contrib/exitlist script 34495 take arguments rather than require direct editing. 34496 - Inform the server operator when we decide not to advertise a 34497 DirPort due to AccountingMax enabled or a low BandwidthRate. It 34498 was confusing Zax, so now we're hopefully more helpful. 34499 - Bring us one step closer to being able to establish an encrypted 34500 directory tunnel without knowing a descriptor first. Still not 34501 ready yet. As part of the change, now assume we can use a 34502 create_fast cell if we don't know anything about a router. 34503 - Allow exit nodes to use nameservers running on ports other than 53. 34504 - Servers now cache reverse DNS replies. 34505 - Add an --ignore-missing-torrc command-line option so that we can 34506 get the "use sensible defaults if the configuration file doesn't 34507 exist" behavior even when specifying a torrc location on the command 34508 line. 34509 34510 o Minor features (controller): 34511 - Track reasons for OR connection failure; make these reasons 34512 available via the controller interface. (Patch from Mike Perry.) 34513 - Add a SOCKS_BAD_HOSTNAME client status event so controllers 34514 can learn when clients are sending malformed hostnames to Tor. 34515 - Clean up documentation for controller status events. 34516 - Add a REMAP status to stream events to note that a stream's 34517 address has changed because of a cached address or a MapAddress 34518 directive. 34519 34520 34521Changes in version 0.1.2.6-alpha - 2007-01-09 34522 o Major bugfixes: 34523 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS 34524 connection handles more than 4 gigs in either direction, we crash. 34525 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an 34526 advertised exit node, somebody might try to exit from us when 34527 we're bootstrapping and before we've built our descriptor yet. 34528 Refuse the connection rather than crashing. 34529 34530 o Minor bugfixes: 34531 - Warn if we (as a server) find that we've resolved an address that we 34532 weren't planning to resolve. 34533 - Warn that using select() on any libevent version before 1.1 will be 34534 unnecessarily slow (even for select()). 34535 - Flush ERR-level controller status events just like we currently 34536 flush ERR-level log events, so that a Tor shutdown doesn't prevent 34537 the controller from learning about current events. 34538 34539 o Minor features (more controller status events): 34540 - Implement EXTERNAL_ADDRESS server status event so controllers can 34541 learn when our address changes. 34542 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers 34543 can learn when directories reject our descriptor. 34544 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers 34545 can learn when a client application is speaking a non-socks protocol 34546 to our SocksPort. 34547 - Implement DANGEROUS_SOCKS client status event so controllers 34548 can learn when a client application is leaking DNS addresses. 34549 - Implement BUG general status event so controllers can learn when 34550 Tor is unhappy about its internal invariants. 34551 - Implement CLOCK_SKEW general status event so controllers can learn 34552 when Tor thinks the system clock is set incorrectly. 34553 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR 34554 server status events so controllers can learn when their descriptors 34555 are accepted by a directory. 34556 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED} 34557 server status events so controllers can learn about Tor's progress in 34558 deciding whether it's reachable from the outside. 34559 - Implement BAD_LIBEVENT general status event so controllers can learn 34560 when we have a version/method combination in libevent that needs to 34561 be changed. 34562 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED, 34563 and DNS_USELESS server status events so controllers can learn 34564 about changes to DNS server status. 34565 34566 o Minor features (directory): 34567 - Authorities no longer recommend exits as guards if this would shift 34568 too much load to the exit nodes. 34569 34570 34571Changes in version 0.1.2.5-alpha - 2007-01-06 34572 o Major features: 34573 - Enable write limiting as well as read limiting. Now we sacrifice 34574 capacity if we're pushing out lots of directory traffic, rather 34575 than overrunning the user's intended bandwidth limits. 34576 - Include TLS overhead when counting bandwidth usage; previously, we 34577 would count only the bytes sent over TLS, but not the bytes used 34578 to send them. 34579 - Support running the Tor service with a torrc not in the same 34580 directory as tor.exe and default to using the torrc located in 34581 the %appdata%\Tor\ of the user who installed the service. Patch 34582 from Matt Edman. 34583 - Servers now check for the case when common DNS requests are going to 34584 wildcarded addresses (i.e. all getting the same answer), and change 34585 their exit policy to reject *:* if it's happening. 34586 - Implement BEGIN_DIR cells, so we can connect to the directory 34587 server via TLS to do encrypted directory requests rather than 34588 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns 34589 config options if you like. 34590 34591 o Minor features (config and docs): 34592 - Start using the state file to store bandwidth accounting data: 34593 the bw_accounting file is now obsolete. We'll keep generating it 34594 for a while for people who are still using 0.1.2.4-alpha. 34595 - Try to batch changes to the state file so that we do as few 34596 disk writes as possible while still storing important things in 34597 a timely fashion. 34598 - The state file and the bw_accounting file get saved less often when 34599 the AvoidDiskWrites config option is set. 34600 - Make PIDFile work on Windows (untested). 34601 - Add internal descriptions for a bunch of configuration options: 34602 accessible via controller interface and in comments in saved 34603 options files. 34604 - Reject *:563 (NNTPS) in the default exit policy. We already reject 34605 NNTP by default, so this seems like a sensible addition. 34606 - Clients now reject hostnames with invalid characters. This should 34607 avoid some inadvertent info leaks. Add an option 34608 AllowNonRFC953Hostnames to disable this behavior, in case somebody 34609 is running a private network with hosts called @, !, and #. 34610 - Add a maintainer script to tell us which options are missing 34611 documentation: "make check-docs". 34612 - Add a new address-spec.txt document to describe our special-case 34613 addresses: .exit, .onion, and .noconnnect. 34614 34615 o Minor features (DNS): 34616 - Ongoing work on eventdns infrastructure: now it has dns server 34617 and ipv6 support. One day Tor will make use of it. 34618 - Add client-side caching for reverse DNS lookups. 34619 - Add support to tor-resolve tool for reverse lookups and SOCKS5. 34620 - When we change nameservers or IP addresses, reset and re-launch 34621 our tests for DNS hijacking. 34622 34623 o Minor features (directory): 34624 - Authorities now specify server versions in networkstatus. This adds 34625 about 2% to the size of compressed networkstatus docs, and allows 34626 clients to tell which servers support BEGIN_DIR and which don't. 34627 The implementation is forward-compatible with a proposed future 34628 protocol version scheme not tied to Tor versions. 34629 - DirServer configuration lines now have an orport= option so 34630 clients can open encrypted tunnels to the authorities without 34631 having downloaded their descriptors yet. Enabled for moria1, 34632 moria2, tor26, and lefkada now in the default configuration. 34633 - Directory servers are more willing to send a 503 "busy" if they 34634 are near their write limit, especially for v1 directory requests. 34635 Now they can use their limited bandwidth for actual Tor traffic. 34636 - Clients track responses with status 503 from dirservers. After a 34637 dirserver has given us a 503, we try not to use it until an hour has 34638 gone by, or until we have no dirservers that haven't given us a 503. 34639 - When we get a 503 from a directory, and we're not a server, we don't 34640 count the failure against the total number of failures allowed 34641 for the thing we're trying to download. 34642 - Report X-Your-Address-Is correctly from tunneled directory 34643 connections; don't report X-Your-Address-Is when it's an internal 34644 address; and never believe reported remote addresses when they're 34645 internal. 34646 - Protect against an unlikely DoS attack on directory servers. 34647 - Add a BadDirectory flag to network status docs so that authorities 34648 can (eventually) tell clients about caches they believe to be 34649 broken. 34650 34651 o Minor features (controller): 34652 - Have GETINFO dir/status/* work on hosts with DirPort disabled. 34653 - Reimplement GETINFO so that info/names stays in sync with the 34654 actual keys. 34655 - Implement "GETINFO fingerprint". 34656 - Implement "SETEVENTS GUARD" so controllers can get updates on 34657 entry guard status as it changes. 34658 34659 o Minor features (clean up obsolete pieces): 34660 - Remove some options that have been deprecated since at least 34661 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and 34662 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log 34663 to set log options. 34664 - We no longer look for identity and onion keys in "identity.key" and 34665 "onion.key" -- these were replaced by secret_id_key and 34666 secret_onion_key in 0.0.8pre1. 34667 - We no longer require unrecognized directory entries to be 34668 preceded by "opt". 34669 34670 o Major bugfixes (security): 34671 - Stop sending the HttpProxyAuthenticator string to directory 34672 servers when directory connections are tunnelled through Tor. 34673 - Clients no longer store bandwidth history in the state file. 34674 - Do not log introduction points for hidden services if SafeLogging 34675 is set. 34676 - When generating bandwidth history, round down to the nearest 34677 1k. When storing accounting data, round up to the nearest 1k. 34678 - When we're running as a server, remember when we last rotated onion 34679 keys, so that we will rotate keys once they're a week old even if 34680 we never stay up for a week ourselves. 34681 34682 o Major bugfixes (other): 34683 - Fix a longstanding bug in eventdns that prevented the count of 34684 timed-out resolves from ever being reset. This bug caused us to 34685 give up on a nameserver the third time it timed out, and try it 34686 10 seconds later... and to give up on it every time it timed out 34687 after that. 34688 - Take out the '5 second' timeout from the connection retry 34689 schedule. Now the first connect attempt will wait a full 10 34690 seconds before switching to a new circuit. Perhaps this will help 34691 a lot. Based on observations from Mike Perry. 34692 - Fix a bug on the Windows implementation of tor_mmap_file() that 34693 would prevent the cached-routers file from ever loading. Reported 34694 by John Kimble. 34695 34696 o Minor bugfixes: 34697 - Fix an assert failure when a directory authority sets 34698 AuthDirRejectUnlisted and then receives a descriptor from an 34699 unlisted router. Reported by seeess. 34700 - Avoid a double-free when parsing malformed DirServer lines. 34701 - Fix a bug when a BSD-style PF socket is first used. Patch from 34702 Fabian Keil. 34703 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking 34704 to resolve an address at a given exit node even when they ask for 34705 it by name. 34706 - Servers no longer ever list themselves in their "family" line, 34707 even if configured to do so. This makes it easier to configure 34708 family lists conveniently. 34709 - When running as a server, don't fall back to 127.0.0.1 when no 34710 nameservers are configured in /etc/resolv.conf; instead, make the 34711 user fix resolv.conf or specify nameservers explicitly. (Resolves 34712 bug 363.) 34713 - Stop accepting certain malformed ports in configured exit policies. 34714 - Don't re-write the fingerprint file every restart, unless it has 34715 changed. 34716 - Stop warning when a single nameserver fails: only warn when _all_ of 34717 our nameservers have failed. Also, when we only have one nameserver, 34718 raise the threshold for deciding that the nameserver is dead. 34719 - Directory authorities now only decide that routers are reachable 34720 if their identity keys are as expected. 34721 - When the user uses bad syntax in the Log config line, stop 34722 suggesting other bad syntax as a replacement. 34723 - Correctly detect ipv6 DNS capability on OpenBSD. 34724 34725 o Minor bugfixes (controller): 34726 - Report the circuit number correctly in STREAM CLOSED events. Bug 34727 reported by Mike Perry. 34728 - Do not report bizarre values for results of accounting GETINFOs 34729 when the last second's write or read exceeds the allotted bandwidth. 34730 - Report "unrecognized key" rather than an empty string when the 34731 controller tries to fetch a networkstatus that doesn't exist. 34732 34733 34734Changes in version 0.1.1.26 - 2006-12-14 34735 o Security bugfixes: 34736 - Stop sending the HttpProxyAuthenticator string to directory 34737 servers when directory connections are tunnelled through Tor. 34738 - Clients no longer store bandwidth history in the state file. 34739 - Do not log introduction points for hidden services if SafeLogging 34740 is set. 34741 34742 o Minor bugfixes: 34743 - Fix an assert failure when a directory authority sets 34744 AuthDirRejectUnlisted and then receives a descriptor from an 34745 unlisted router (reported by seeess). 34746 34747 34748Changes in version 0.1.2.4-alpha - 2006-12-03 34749 o Major features: 34750 - Add support for using natd; this allows FreeBSDs earlier than 34751 5.1.2 to have ipfw send connections through Tor without using 34752 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.) 34753 34754 o Minor features: 34755 - Make all connections to addresses of the form ".noconnect" 34756 immediately get closed. This lets application/controller combos 34757 successfully test whether they're talking to the same Tor by 34758 watching for STREAM events. 34759 - Make cross.sh cross-compilation script work even when autogen.sh 34760 hasn't been run. (Patch from Michael Mohr.) 34761 - Statistics dumped by -USR2 now include a breakdown of public key 34762 operations, for profiling. 34763 34764 o Major bugfixes: 34765 - Fix a major leak when directory authorities parse their 34766 approved-routers list, a minor memory leak when we fail to pick 34767 an exit node, and a few rare leaks on errors. 34768 - Handle TransPort connections even when the server sends data before 34769 the client sends data. Previously, the connection would just hang 34770 until the client sent data. (Patch from tup based on patch from 34771 Zajcev Evgeny.) 34772 - Avoid assert failure when our cached-routers file is empty on 34773 startup. 34774 34775 o Minor bugfixes: 34776 - Don't log spurious warnings when we see a circuit close reason we 34777 don't recognize; it's probably just from a newer version of Tor. 34778 - Have directory authorities allow larger amounts of drift in uptime 34779 without replacing the server descriptor: previously, a server that 34780 restarted every 30 minutes could have 48 "interesting" descriptors 34781 per day. 34782 - Start linking to the Tor specification and Tor reference manual 34783 correctly in the Windows installer. 34784 - Add Vidalia to the OS X uninstaller script, so when we uninstall 34785 Tor/Privoxy we also uninstall Vidalia. 34786 - Resume building on Irix64, and fix a lot of warnings from its 34787 MIPSpro C compiler. 34788 - Don't corrupt last_guessed_ip in router_new_address_suggestion() 34789 when we're running as a client. 34790 34791 34792Changes in version 0.1.1.25 - 2006-11-04 34793 o Major bugfixes: 34794 - When a client asks us to resolve (rather than connect to) 34795 an address, and we have a cached answer, give them the cached 34796 answer. Previously, we would give them no answer at all. 34797 - We were building exactly the wrong circuits when we predict 34798 hidden service requirements, meaning Tor would have to build all 34799 its circuits on demand. 34800 - If none of our live entry guards have a high uptime, but we 34801 require a guard with a high uptime, try adding a new guard before 34802 we give up on the requirement. This patch should make long-lived 34803 connections more stable on average. 34804 - When testing reachability of our DirPort, don't launch new 34805 tests when there's already one in progress -- unreachable 34806 servers were stacking up dozens of testing streams. 34807 34808 o Security bugfixes: 34809 - When the user sends a NEWNYM signal, clear the client-side DNS 34810 cache too. Otherwise we continue to act on previous information. 34811 34812 o Minor bugfixes: 34813 - Avoid a memory corruption bug when creating a hash table for 34814 the first time. 34815 - Avoid possibility of controller-triggered crash when misusing 34816 certain commands from a v0 controller on platforms that do not 34817 handle printf("%s",NULL) gracefully. 34818 - Avoid infinite loop on unexpected controller input. 34819 - Don't log spurious warnings when we see a circuit close reason we 34820 don't recognize; it's probably just from a newer version of Tor. 34821 - Add Vidalia to the OS X uninstaller script, so when we uninstall 34822 Tor/Privoxy we also uninstall Vidalia. 34823 34824 34825Changes in version 0.1.2.3-alpha - 2006-10-29 34826 o Minor features: 34827 - Prepare for servers to publish descriptors less often: never 34828 discard a descriptor simply for being too old until either it is 34829 recommended by no authorities, or until we get a better one for 34830 the same router. Make caches consider retaining old recommended 34831 routers for even longer. 34832 - If most authorities set a BadExit flag for a server, clients 34833 don't think of it as a general-purpose exit. Clients only consider 34834 authorities that advertise themselves as listing bad exits. 34835 - Directory servers now provide 'Pragma: no-cache' and 'Expires' 34836 headers for content, so that we can work better in the presence of 34837 caching HTTP proxies. 34838 - Allow authorities to list nodes as bad exits by fingerprint or by 34839 address. 34840 34841 o Minor features, controller: 34842 - Add a REASON field to CIRC events; for backward compatibility, this 34843 field is sent only to controllers that have enabled the extended 34844 event format. Also, add additional reason codes to explain why 34845 a given circuit has been destroyed or truncated. (Patches from 34846 Mike Perry) 34847 - Add a REMOTE_REASON field to extended CIRC events to tell the 34848 controller about why a remote OR told us to close a circuit. 34849 - Stream events also now have REASON and REMOTE_REASON fields, 34850 working much like those for circuit events. 34851 - There's now a GETINFO ns/... field so that controllers can ask Tor 34852 about the current status of a router. 34853 - A new event type "NS" to inform a controller when our opinion of 34854 a router's status has changed. 34855 - Add a GETINFO events/names and GETINFO features/names so controllers 34856 can tell which events and features are supported. 34857 - A new CLEARDNSCACHE signal to allow controllers to clear the 34858 client-side DNS cache without expiring circuits. 34859 34860 o Security bugfixes: 34861 - When the user sends a NEWNYM signal, clear the client-side DNS 34862 cache too. Otherwise we continue to act on previous information. 34863 34864 o Minor bugfixes: 34865 - Avoid sending junk to controllers or segfaulting when a controller 34866 uses EVENT_NEW_DESC with verbose nicknames. 34867 - Stop triggering asserts if the controller tries to extend hidden 34868 service circuits (reported by mwenge). 34869 - Avoid infinite loop on unexpected controller input. 34870 - When the controller does a "GETINFO network-status", tell it 34871 about even those routers whose descriptors are very old, and use 34872 long nicknames where appropriate. 34873 - Change NT service functions to be loaded on demand. This lets us 34874 build with MinGW without breaking Tor for Windows 98 users. 34875 - Do DirPort reachability tests less often, since a single test 34876 chews through many circuits before giving up. 34877 - In the hidden service example in torrc.sample, stop recommending 34878 esoteric and discouraged hidden service options. 34879 - When stopping an NT service, wait up to 10 sec for it to actually 34880 stop. Patch from Matt Edman; resolves bug 295. 34881 - Fix handling of verbose nicknames with ORCONN controller events: 34882 make them show up exactly when requested, rather than exactly when 34883 not requested. 34884 - When reporting verbose nicknames in entry_guards_getinfo(), avoid 34885 printing a duplicate "$" in the keys we send (reported by mwenge). 34886 - Correctly set maximum connection limit on Cygwin. (This time 34887 for sure!) 34888 - Try to detect Windows correctly when cross-compiling. 34889 - Detect the size of the routers file correctly even if it is 34890 corrupted (on systems without mmap) or not page-aligned (on systems 34891 with mmap). This bug was harmless. 34892 - Sometimes we didn't bother sending a RELAY_END cell when an attempt 34893 to open a stream fails; now we do in more cases. This should 34894 make clients able to find a good exit faster in some cases, since 34895 unhandleable requests will now get an error rather than timing out. 34896 - Resolve two memory leaks when rebuilding the on-disk router cache 34897 (reported by fookoowa). 34898 - Clean up minor code warnings suggested by the MIPSpro C compiler, 34899 and reported by some Centos users. 34900 - Controller signals now work on non-Unix platforms that don't define 34901 SIGUSR1 and SIGUSR2 the way we expect. 34902 - Patch from Michael Mohr to contrib/cross.sh, so it checks more 34903 values before failing, and always enables eventdns. 34904 - Libevent-1.2 exports, but does not define in its headers, strlcpy. 34905 Try to fix this in configure.in by checking for most functions 34906 before we check for libevent. 34907 34908 34909Changes in version 0.1.2.2-alpha - 2006-10-07 34910 o Major features: 34911 - Make our async eventdns library on-by-default for Tor servers, 34912 and plan to deprecate the separate dnsworker threads. 34913 - Add server-side support for "reverse" DNS lookups (using PTR 34914 records so clients can determine the canonical hostname for a given 34915 IPv4 address). Only supported by servers using eventdns; servers 34916 now announce in their descriptors whether they support eventdns. 34917 - Specify and implement client-side SOCKS5 interface for reverse DNS 34918 lookups (see doc/socks-extensions.txt). 34919 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to 34920 connect to directory servers through Tor. Previously, clients needed 34921 to find Tor exits to make private connections to directory servers. 34922 - Avoid choosing Exit nodes for entry or middle hops when the 34923 total bandwidth available from non-Exit nodes is much higher than 34924 the total bandwidth available from Exit nodes. 34925 - Workaround for name servers (like Earthlink's) that hijack failing 34926 DNS requests and replace the no-such-server answer with a "helpful" 34927 redirect to an advertising-driven search portal. Also work around 34928 DNS hijackers who "helpfully" decline to hijack known-invalid 34929 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0" 34930 lets you turn it off. 34931 - Send out a burst of long-range padding cells once we've established 34932 that we're reachable. Spread them over 4 circuits, so hopefully 34933 a few will be fast. This exercises our bandwidth and bootstraps 34934 us into the directory more quickly. 34935 34936 o New/improved config options: 34937 - Add new config option "ResolvConf" to let the server operator 34938 choose an alternate resolve.conf file when using eventdns. 34939 - Add an "EnforceDistinctSubnets" option to control our "exclude 34940 servers on the same /16" behavior. It's still on by default; this 34941 is mostly for people who want to operate private test networks with 34942 all the machines on the same subnet. 34943 - If one of our entry guards is on the ExcludeNodes list, or the 34944 directory authorities don't think it's a good guard, treat it as 34945 if it were unlisted: stop using it as a guard, and throw it off 34946 the guards list if it stays that way for a long time. 34947 - Allow directory authorities to be marked separately as authorities 34948 for the v1 directory protocol, the v2 directory protocol, and 34949 as hidden service directories, to make it easier to retire old 34950 authorities. V1 authorities should set "HSAuthoritativeDir 1" 34951 to continue being hidden service authorities too. 34952 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS). 34953 34954 o Minor features, controller: 34955 - Fix CIRC controller events so that controllers can learn the 34956 identity digests of non-Named servers used in circuit paths. 34957 - Let controllers ask for more useful identifiers for servers. Instead 34958 of learning identity digests for un-Named servers and nicknames 34959 for Named servers, the new identifiers include digest, nickname, 34960 and indication of Named status. Off by default; see control-spec.txt 34961 for more information. 34962 - Add a "getinfo address" controller command so it can display Tor's 34963 best guess to the user. 34964 - New controller event to alert the controller when our server 34965 descriptor has changed. 34966 - Give more meaningful errors on controller authentication failure. 34967 34968 o Minor features, other: 34969 - When asked to resolve a hostname, don't use non-exit servers unless 34970 requested to do so. This allows servers with broken DNS to be 34971 useful to the network. 34972 - Divide eventdns log messages into warn and info messages. 34973 - Reserve the nickname "Unnamed" for routers that can't pick 34974 a hostname: any router can call itself Unnamed; directory 34975 authorities will never allocate Unnamed to any particular router; 34976 clients won't believe that any router is the canonical Unnamed. 34977 - Only include function names in log messages for info/debug messages. 34978 For notice/warn/err, the content of the message should be clear on 34979 its own, and printing the function name only confuses users. 34980 - Avoid some false positives during reachability testing: don't try 34981 to test via a server that's on the same /24 as us. 34982 - If we fail to build a circuit to an intended enclave, and it's 34983 not mandatory that we use that enclave, stop wanting it. 34984 - When eventdns is enabled, allow multithreaded builds on NetBSD and 34985 OpenBSD. (We had previously disabled threads on these platforms 34986 because they didn't have working thread-safe resolver functions.) 34987 34988 o Major bugfixes, anonymity/security: 34989 - If a client asked for a server by name, and there's a named server 34990 in our network-status but we don't have its descriptor yet, we 34991 could return an unnamed server instead. 34992 - Fix NetBSD bug that could allow someone to force uninitialized RAM 34993 to be sent to a server's DNS resolver. This only affects NetBSD 34994 and other platforms that do not bounds-check tolower(). 34995 - Reject (most) attempts to use Tor circuits with length one. (If 34996 many people start using Tor as a one-hop proxy, exit nodes become 34997 a more attractive target for compromise.) 34998 - Just because your DirPort is open doesn't mean people should be 34999 able to remotely teach you about hidden service descriptors. Now 35000 only accept rendezvous posts if you've got HSAuthoritativeDir set. 35001 35002 o Major bugfixes, other: 35003 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire) 35004 - When a client asks the server to resolve (not connect to) 35005 an address, and it has a cached answer, give them the cached answer. 35006 Previously, the server would give them no answer at all. 35007 - Allow really slow clients to not hang up five minutes into their 35008 directory downloads (suggested by Adam J. Richter). 35009 - We were building exactly the wrong circuits when we anticipated 35010 hidden service requirements, meaning Tor would have to build all 35011 its circuits on demand. 35012 - Avoid crashing when we mmap a router cache file of size 0. 35013 - When testing reachability of our DirPort, don't launch new 35014 tests when there's already one in progress -- unreachable 35015 servers were stacking up dozens of testing streams. 35016 35017 o Minor bugfixes, correctness: 35018 - If we're a directory mirror and we ask for "all" network status 35019 documents, we would discard status documents from authorities 35020 we don't recognize. 35021 - Avoid a memory corruption bug when creating a hash table for 35022 the first time. 35023 - Avoid controller-triggered crash when misusing certain commands 35024 from a v0 controller on platforms that do not handle 35025 printf("%s",NULL) gracefully. 35026 - Don't crash when a controller sends a third argument to an 35027 "extendcircuit" request. 35028 - Controller protocol fixes: fix encoding in "getinfo addr-mappings" 35029 response; fix error code when "getinfo dir/status/" fails. 35030 - Avoid crash when telling controller stream-status and a stream 35031 is detached. 35032 - Patch from Adam Langley to fix assert() in eventdns.c. 35033 - Fix a debug log message in eventdns to say "X resolved to Y" 35034 instead of "X resolved to X". 35035 - Make eventdns give strings for DNS errors, not just error numbers. 35036 - Track unreachable entry guards correctly: don't conflate 35037 'unreachable by us right now' with 'listed as down by the directory 35038 authorities'. With the old code, if a guard was unreachable by 35039 us but listed as running, it would clog our guard list forever. 35040 - Behave correctly in case we ever have a network with more than 35041 2GB/s total advertised capacity. 35042 - Make TrackExitHosts case-insensitive, and fix the behavior of 35043 ".suffix" TrackExitHosts items to avoid matching in the middle of 35044 an address. 35045 - Finally fix the openssl warnings from newer gccs that believe that 35046 ignoring a return value is okay, but casting a return value and 35047 then ignoring it is a sign of madness. 35048 - Prevent the contrib/exitlist script from printing the same 35049 result more than once. 35050 - Patch from Steve Hildrey: Generate network status correctly on 35051 non-versioning dirservers. 35052 - Don't listen to the X-Your-Address-Is hint if you did the lookup 35053 via Tor; otherwise you'll think you're the exit node's IP address. 35054 35055 o Minor bugfixes, performance: 35056 - Two small performance improvements on parsing descriptors. 35057 - Major performance improvement on inserting descriptors: change 35058 algorithm from O(n^2) to O(n). 35059 - Make the common memory allocation path faster on machines where 35060 malloc(0) returns a pointer. 35061 - Start remembering X-Your-Address-Is directory hints even if you're 35062 a client, so you can become a server more smoothly. 35063 - Avoid duplicate entries on MyFamily line in server descriptor. 35064 35065 o Packaging, features: 35066 - Remove architecture from OS X builds. The official builds are 35067 now universal binaries. 35068 - The Debian package now uses --verify-config when (re)starting, 35069 to distinguish configuration errors from other errors. 35070 - Update RPMs to require libevent 1.1b. 35071 35072 o Packaging, bugfixes: 35073 - Patches so Tor builds with MinGW on Windows. 35074 - Patches so Tor might run on Cygwin again. 35075 - Resume building on non-gcc compilers and ancient gcc. Resume 35076 building with the -O0 compile flag. Resume building cleanly on 35077 Debian woody. 35078 - Run correctly on OS X platforms with case-sensitive filesystems. 35079 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup). 35080 - Add autoconf checks so Tor can build on Solaris x86 again. 35081 35082 o Documentation 35083 - Documented (and renamed) ServerDNSSearchDomains and 35084 ServerDNSResolvConfFile options. 35085 - Be clearer that the *ListenAddress directives can be repeated 35086 multiple times. 35087 35088 35089Changes in version 0.1.1.24 - 2006-09-29 35090 o Major bugfixes: 35091 - Allow really slow clients to not hang up five minutes into their 35092 directory downloads (suggested by Adam J. Richter). 35093 - Fix major performance regression from 0.1.0.x: instead of checking 35094 whether we have enough directory information every time we want to 35095 do something, only check when the directory information has changed. 35096 This should improve client CPU usage by 25-50%. 35097 - Don't crash if, after a server has been running for a while, 35098 it can't resolve its hostname. 35099 35100 o Minor bugfixes: 35101 - Allow Tor to start when RunAsDaemon is set but no logs are set. 35102 - Don't crash when the controller receives a third argument to an 35103 "extendcircuit" request. 35104 - Controller protocol fixes: fix encoding in "getinfo addr-mappings" 35105 response; fix error code when "getinfo dir/status/" fails. 35106 - Fix configure.in to not produce broken configure files with 35107 more recent versions of autoconf. Thanks to Clint for his auto* 35108 voodoo. 35109 - Fix security bug on NetBSD that could allow someone to force 35110 uninitialized RAM to be sent to a server's DNS resolver. This 35111 only affects NetBSD and other platforms that do not bounds-check 35112 tolower(). 35113 - Warn user when using libevent 1.1a or earlier with win32 or kqueue 35114 methods: these are known to be buggy. 35115 - If we're a directory mirror and we ask for "all" network status 35116 documents, we would discard status documents from authorities 35117 we don't recognize. 35118 35119 35120Changes in version 0.1.2.1-alpha - 2006-08-27 35121 o Major features: 35122 - Add "eventdns" async dns library from Adam Langley, tweaked to 35123 build on OSX and Windows. Only enabled if you pass the 35124 --enable-eventdns argument to configure. 35125 - Allow servers with no hostname or IP address to learn their 35126 IP address by asking the directory authorities. This code only 35127 kicks in when you would normally have exited with a "no address" 35128 error. Nothing's authenticated, so use with care. 35129 - Rather than waiting a fixed amount of time between retrying 35130 application connections, we wait only 5 seconds for the first, 35131 10 seconds for the second, and 15 seconds for each retry after 35132 that. Hopefully this will improve the expected user experience. 35133 - Patch from Tup to add support for transparent AP connections: 35134 this basically bundles the functionality of trans-proxy-tor 35135 into the Tor mainline. Now hosts with compliant pf/netfilter 35136 implementations can redirect TCP connections straight to Tor 35137 without diverting through SOCKS. Needs docs. 35138 - Busy directory servers save lots of memory by spooling server 35139 descriptors, v1 directories, and v2 networkstatus docs to buffers 35140 as needed rather than en masse. Also mmap the cached-routers 35141 files, so we don't need to keep the whole thing in memory too. 35142 - Automatically avoid picking more than one node from the same 35143 /16 network when constructing a circuit. 35144 - Revise and clean up the torrc.sample that we ship with; add 35145 a section for BandwidthRate and BandwidthBurst. 35146 35147 o Minor features: 35148 - Split circuit_t into origin_circuit_t and or_circuit_t, and 35149 split connection_t into edge, or, dir, control, and base structs. 35150 These will save quite a bit of memory on busy servers, and they'll 35151 also help us track down bugs in the code and bugs in the spec. 35152 - Experimentally re-enable kqueue on OSX when using libevent 1.1b 35153 or later. Log when we are doing this, so we can diagnose it when 35154 it fails. (Also, recommend libevent 1.1b for kqueue and 35155 win32 methods; deprecate libevent 1.0b harder; make libevent 35156 recommendation system saner.) 35157 - Start being able to build universal binaries on OS X (thanks 35158 to Phobos). 35159 - Export the default exit policy via the control port, so controllers 35160 don't need to guess what it is / will be later. 35161 - Add a man page entry for ProtocolWarnings. 35162 - Add TestVia config option to the man page. 35163 - Remove even more protocol-related warnings from Tor server logs, 35164 such as bad TLS handshakes and malformed begin cells. 35165 - Stop fetching descriptors if you're not a dir mirror and you 35166 haven't tried to establish any circuits lately. [This currently 35167 causes some dangerous behavior, because when you start up again 35168 you'll use your ancient server descriptors.] 35169 - New DirPort behavior: if you have your dirport set, you download 35170 descriptors aggressively like a directory mirror, whether or not 35171 your ORPort is set. 35172 - Get rid of the router_retry_connections notion. Now routers 35173 no longer try to rebuild long-term connections to directory 35174 authorities, and directory authorities no longer try to rebuild 35175 long-term connections to all servers. We still don't hang up 35176 connections in these two cases though -- we need to look at it 35177 more carefully to avoid flapping, and we likely need to wait til 35178 0.1.1.x is obsolete. 35179 - Drop compatibility with obsolete Tors that permit create cells 35180 to have the wrong circ_id_type. 35181 - Re-enable per-connection rate limiting. Get rid of the "OP 35182 bandwidth" concept. Lay groundwork for "bandwidth classes" -- 35183 separate global buckets that apply depending on what sort of conn 35184 it is. 35185 - Start publishing one minute or so after we find our ORPort 35186 to be reachable. This will help reduce the number of descriptors 35187 we have for ourselves floating around, since it's quite likely 35188 other things (e.g. DirPort) will change during that minute too. 35189 - Fork the v1 directory protocol into its own spec document, 35190 and mark dir-spec.txt as the currently correct (v2) spec. 35191 35192 o Major bugfixes: 35193 - When we find our DirPort to be reachable, publish a new descriptor 35194 so we'll tell the world (reported by pnx). 35195 - Publish a new descriptor after we hup/reload. This is important 35196 if our config has changed such that we'll want to start advertising 35197 our DirPort now, etc. 35198 - Allow Tor to start when RunAsDaemon is set but no logs are set. 35199 - When we have a state file we cannot parse, tell the user and 35200 move it aside. Now we avoid situations where the user starts 35201 Tor in 1904, Tor writes a state file with that timestamp in it, 35202 the user fixes her clock, and Tor refuses to start. 35203 - Fix configure.in to not produce broken configure files with 35204 more recent versions of autoconf. Thanks to Clint for his auto* 35205 voodoo. 35206 - "tor --verify-config" now exits with -1(255) or 0 depending on 35207 whether the config options are bad or good. 35208 - Resolve bug 321 when using dnsworkers: append a period to every 35209 address we resolve at the exit node, so that we do not accidentally 35210 pick up local addresses, and so that failing searches are retried 35211 in the resolver search domains. (This is already solved for 35212 eventdns.) (This breaks Blossom servers for now.) 35213 - If we are using an exit enclave and we can't connect, e.g. because 35214 its webserver is misconfigured to not listen on localhost, then 35215 back off and try connecting from somewhere else before we fail. 35216 35217 o Minor bugfixes: 35218 - Start compiling on MinGW on Windows (patches from Mike Chiussi). 35219 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio). 35220 - Fix bug 314: Tor clients issued "unsafe socks" warnings even 35221 when the IP address is mapped through MapAddress to a hostname. 35222 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do 35223 useless IPv6 DNS resolves. 35224 - Patch suggested by Karsten Loesing: respond to SIGNAL command 35225 before we execute the signal, in case the signal shuts us down. 35226 - Clean up AllowInvalidNodes man page entry. 35227 - Claim a commonname of Tor, rather than TOR, in TLS handshakes. 35228 - Add more asserts to track down an assert error on a windows Tor 35229 server with connection_add being called with socket == -1. 35230 - Handle reporting OR_CONN_EVENT_NEW events to the controller. 35231 - Fix misleading log messages: an entry guard that is "unlisted", 35232 as well as not known to be "down" (because we've never heard 35233 of it), is not therefore "up". 35234 - Remove code to special-case "-cvs" ending, since it has not 35235 actually mattered since 0.0.9. 35236 - Make our socks5 handling more robust to broken socks clients: 35237 throw out everything waiting on the buffer in between socks 35238 handshake phases, since they can't possibly (so the theory 35239 goes) have predicted what we plan to respond to them. 35240 35241 35242Changes in version 0.1.1.23 - 2006-07-30 35243 o Major bugfixes: 35244 - Fast Tor servers, especially exit nodes, were triggering asserts 35245 due to a bug in handling the list of pending DNS resolves. Some 35246 bugs still remain here; we're hunting them. 35247 - Entry guards could crash clients by sending unexpected input. 35248 - More fixes on reachability testing: if you find yourself reachable, 35249 then don't ever make any client requests (so you stop predicting 35250 circuits), then hup or have your clock jump, then later your IP 35251 changes, you won't think circuits are working, so you won't try to 35252 test reachability, so you won't publish. 35253 35254 o Minor bugfixes: 35255 - Avoid a crash if the controller does a resetconf firewallports 35256 and then a setconf fascistfirewall=1. 35257 - Avoid an integer underflow when the dir authority decides whether 35258 a router is stable: we might wrongly label it stable, and compute 35259 a slightly wrong median stability, when a descriptor is published 35260 later than now. 35261 - Fix a place where we might trigger an assert if we can't build our 35262 own server descriptor yet. 35263 35264 35265Changes in version 0.1.1.22 - 2006-07-05 35266 o Major bugfixes: 35267 - Fix a big bug that was causing servers to not find themselves 35268 reachable if they changed IP addresses. Since only 0.1.1.22+ 35269 servers can do reachability testing correctly, now we automatically 35270 make sure to test via one of these. 35271 - Fix to allow clients and mirrors to learn directory info from 35272 descriptor downloads that get cut off partway through. 35273 - Directory authorities had a bug in deciding if a newly published 35274 descriptor was novel enough to make everybody want a copy -- a few 35275 servers seem to be publishing new descriptors many times a minute. 35276 o Minor bugfixes: 35277 - Fix a rare bug that was causing some servers to complain about 35278 "closing wedged cpuworkers" and skip some circuit create requests. 35279 - Make the Exit flag in directory status documents actually work. 35280 35281 35282Changes in version 0.1.1.21 - 2006-06-10 35283 o Crash and assert fixes from 0.1.1.20: 35284 - Fix a rare crash on Tor servers that have enabled hibernation. 35285 - Fix a seg fault on startup for Tor networks that use only one 35286 directory authority. 35287 - Fix an assert from a race condition that occurs on Tor servers 35288 while exiting, where various threads are trying to log that they're 35289 exiting, and delete the logs, at the same time. 35290 - Make our unit tests pass again on certain obscure platforms. 35291 35292 o Other fixes: 35293 - Add support for building SUSE RPM packages. 35294 - Speed up initial bootstrapping for clients: if we are making our 35295 first ever connection to any entry guard, then don't mark it down 35296 right after that. 35297 - When only one Tor server in the network is labelled as a guard, 35298 and we've already picked him, we would cycle endlessly picking him 35299 again, being unhappy about it, etc. Now we specifically exclude 35300 current guards when picking a new guard. 35301 - Servers send create cells more reliably after the TLS connection 35302 is established: we were sometimes forgetting to send half of them 35303 when we had more than one pending. 35304 - If we get a create cell that asks us to extend somewhere, but the 35305 Tor server there doesn't match the expected digest, we now send 35306 a destroy cell back, rather than silently doing nothing. 35307 - Make options->RedirectExit work again. 35308 - Make cookie authentication for the controller work again. 35309 - Stop being picky about unusual characters in the arguments to 35310 mapaddress. It's none of our business. 35311 - Add a new config option "TestVia" that lets you specify preferred 35312 middle hops to use for test circuits. Perhaps this will let me 35313 debug the reachability problems better. 35314 35315 o Log / documentation fixes: 35316 - If we're a server and some peer has a broken TLS certificate, don't 35317 log about it unless ProtocolWarnings is set, i.e., we want to hear 35318 about protocol violations by others. 35319 - Fix spelling of VirtualAddrNetwork in man page. 35320 - Add a better explanation at the top of the autogenerated torrc file 35321 about what happened to our old torrc. 35322 35323 35324Changes in version 0.1.1.20 - 2006-05-23 35325 o Bugfixes: 35326 - Downgrade a log severity where servers complain that they're 35327 invalid. 35328 - Avoid a compile warning on FreeBSD. 35329 - Remove string size limit on NEWDESC messages; solve bug 291. 35330 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon 35331 more thoroughly when we're running on windows. 35332 35333 35334Changes in version 0.1.1.19-rc - 2006-05-03 35335 o Minor bugs: 35336 - Regenerate our local descriptor if it's dirty and we try to use 35337 it locally (e.g. if it changes during reachability detection). 35338 - If we setconf our ORPort to 0, we continued to listen on the 35339 old ORPort and receive connections. 35340 - Avoid a second warning about machine/limits.h on Debian 35341 GNU/kFreeBSD. 35342 - Be willing to add our own routerinfo into the routerlist. 35343 Now authorities will include themselves in their directories 35344 and network-statuses. 35345 - Stop trying to upload rendezvous descriptors to every 35346 directory authority: only try the v1 authorities. 35347 - Servers no longer complain when they think they're not 35348 registered with the directory authorities. There were too many 35349 false positives. 35350 - Backport dist-rpm changes so rpms can be built without errors. 35351 35352 o Features: 35353 - Implement an option, VirtualAddrMask, to set which addresses 35354 get handed out in response to mapaddress requests. This works 35355 around a bug in tsocks where 127.0.0.0/8 is never socksified. 35356 35357 35358Changes in version 0.1.1.18-rc - 2006-04-10 35359 o Major fixes: 35360 - Work harder to download live network-statuses from all the 35361 directory authorities we know about. Improve the threshold 35362 decision logic so we're more robust to edge cases. 35363 - When fetching rendezvous descriptors, we were willing to ask 35364 v2 authorities too, which would always return 404. 35365 35366 o Minor fixes: 35367 - Stop listing down or invalid nodes in the v1 directory. This will 35368 reduce its bulk by about 1/3, and reduce load on directory 35369 mirrors. 35370 - When deciding whether a router is Fast or Guard-worthy, consider 35371 his advertised BandwidthRate and not just the BandwidthCapacity. 35372 - No longer ship INSTALL and README files -- they are useless now. 35373 - Force rpmbuild to behave and honor target_cpu. 35374 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD. 35375 - Start to include translated versions of the tor-doc-*.html 35376 files, along with the screenshots. Still needs more work. 35377 - Start sending back 512 and 451 errors if mapaddress fails, 35378 rather than not sending anything back at all. 35379 - When we fail to bind or listen on an incoming or outgoing 35380 socket, we should close it before failing. otherwise we just 35381 leak it. (thanks to weasel for finding.) 35382 - Allow "getinfo dir/status/foo" to work, as long as your DirPort 35383 is enabled. (This is a hack, and will be fixed in 0.1.2.x.) 35384 - Make NoPublish (even though deprecated) work again. 35385 - Fix a minor security flaw where a versioning auth dirserver 35386 could list a recommended version many times in a row to make 35387 clients more convinced that it's recommended. 35388 - Fix crash bug if there are two unregistered servers running 35389 with the same nickname, one of them is down, and you ask for 35390 them by nickname in your EntryNodes or ExitNodes. Also, try 35391 to pick the one that's running rather than an arbitrary one. 35392 - Fix an infinite loop we could hit if we go offline for too long. 35393 - Complain when we hit WSAENOBUFS on recv() or write() too. 35394 Perhaps this will help us hunt the bug. 35395 - If you're not a versioning dirserver, don't put the string 35396 "client-versions \nserver-versions \n" in your network-status. 35397 - Lower the minimum required number of file descriptors to 1000, 35398 so we can have some overhead for Valgrind on Linux, where the 35399 default ulimit -n is 1024. 35400 35401 o New features: 35402 - Add tor.dizum.com as the fifth authoritative directory server. 35403 - Add a new config option FetchUselessDescriptors, off by default, 35404 for when you plan to run "exitlist" on your client and you want 35405 to know about even the non-running descriptors. 35406 35407 35408Changes in version 0.1.1.17-rc - 2006-03-28 35409 o Major fixes: 35410 - Clients and servers since 0.1.1.10-alpha have been expiring 35411 connections whenever they are idle for 5 minutes and they *do* 35412 have circuits on them. Oops. With this new version, clients will 35413 discard their previous entry guard choices and avoid choosing 35414 entry guards running these flawed versions. 35415 - Fix memory leak when uncompressing concatenated zlib streams. This 35416 was causing substantial leaks over time on Tor servers. 35417 - The v1 directory was including servers as much as 48 hours old, 35418 because that's how the new routerlist->routers works. Now only 35419 include them if they're 20 hours old or less. 35420 35421 o Minor fixes: 35422 - Resume building on irix64, netbsd 2.0, etc. 35423 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of 35424 "-Wall -g -O2". 35425 - Stop writing the "router.desc" file, ever. Nothing uses it anymore, 35426 and it is confusing some users. 35427 - Mirrors stop caching the v1 directory so often. 35428 - Make the max number of old descriptors that a cache will hold 35429 rise with the number of directory authorities, so we can scale. 35430 - Change our win32 uname() hack to be more forgiving about what 35431 win32 versions it thinks it's found. 35432 35433 o New features: 35434 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory 35435 server. 35436 - When the controller's *setconf commands fail, collect an error 35437 message in a string and hand it back to the controller. 35438 - Make the v2 dir's "Fast" flag based on relative capacity, just 35439 like "Stable" is based on median uptime. Name everything in the 35440 top 7/8 Fast, and only the top 1/2 gets to be a Guard. 35441 - Log server fingerprint on startup, so new server operators don't 35442 have to go hunting around their filesystem for it. 35443 - Return a robots.txt on our dirport to discourage google indexing. 35444 - Let the controller ask for GETINFO dir/status/foo so it can ask 35445 directly rather than connecting to the dir port. Only works when 35446 dirport is set for now. 35447 35448 o New config options rather than constants in the code: 35449 - SocksTimeout: How long do we let a socks connection wait 35450 unattached before we fail it? 35451 - CircuitBuildTimeout: Cull non-open circuits that were born 35452 at least this many seconds ago. 35453 - CircuitIdleTimeout: Cull open clean circuits that were born 35454 at least this many seconds ago. 35455 35456 35457Changes in version 0.1.1.16-rc - 2006-03-18 35458 o Bugfixes on 0.1.1.15-rc: 35459 - Fix assert when the controller asks to attachstream a connect-wait 35460 or resolve-wait stream. 35461 - Now do address rewriting when the controller asks us to attach 35462 to a particular circuit too. This will let Blossom specify 35463 "moria2.exit" without having to learn what moria2's IP address is. 35464 - Make the "tor --verify-config" command-line work again, so people 35465 can automatically check if their torrc will parse. 35466 - Authoritative dirservers no longer require an open connection from 35467 a server to consider him "reachable". We need this change because 35468 when we add new auth dirservers, old servers won't know not to 35469 hang up on them. 35470 - Let Tor build on Sun CC again. 35471 - Fix an off-by-one buffer size in dirserv.c that magically never 35472 hit our three authorities but broke sjmurdoch's own tor network. 35473 - If we as a directory mirror don't know of any v1 directory 35474 authorities, then don't try to cache any v1 directories. 35475 - Stop warning about unknown servers in our family when they are 35476 given as hex digests. 35477 - Stop complaining as quickly to the server operator that he 35478 hasn't registered his nickname/key binding. 35479 - Various cleanups so we can add new V2 Auth Dirservers. 35480 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to 35481 reflect the updated flags in our v2 dir protocol. 35482 - Resume allowing non-printable characters for exit streams (both 35483 for connecting and for resolving). Now we tolerate applications 35484 that don't follow the RFCs. But continue to block malformed names 35485 at the socks side. 35486 35487 o Bugfixes on 0.1.0.x: 35488 - Fix assert bug in close_logs(): when we close and delete logs, 35489 remove them all from the global "logfiles" list. 35490 - Fix minor integer overflow in calculating when we expect to use up 35491 our bandwidth allocation before hibernating. 35492 - Fix a couple of bugs in OpenSSL detection. Also, deal better when 35493 there are multiple SSLs installed with different versions. 35494 - When we try to be a server and Address is not explicitly set and 35495 our hostname resolves to a private IP address, try to use an 35496 interface address if it has a public address. Now Windows machines 35497 that think of themselves as localhost can work by default. 35498 35499 o New features: 35500 - Let the controller ask for GETINFO dir/server/foo so it can ask 35501 directly rather than connecting to the dir port. 35502 - Let the controller tell us about certain router descriptors 35503 that it doesn't want Tor to use in circuits. Implement 35504 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this. 35505 - New config option SafeSocks to reject all application connections 35506 using unsafe socks protocols. Defaults to off. 35507 35508 35509Changes in version 0.1.1.15-rc - 2006-03-11 35510 o Bugfixes and cleanups: 35511 - When we're printing strings from the network, don't try to print 35512 non-printable characters. This protects us against shell escape 35513 sequence exploits, and also against attacks to fool humans into 35514 misreading their logs. 35515 - Fix a bug where Tor would fail to establish any connections if you 35516 left it off for 24 hours and then started it: we were happy with 35517 the obsolete network statuses, but they all referred to router 35518 descriptors that were too old to fetch, so we ended up with no 35519 valid router descriptors. 35520 - Fix a seg fault in the controller's "getinfo orconn-status" 35521 command while listing status on incoming handshaking connections. 35522 Introduce a status name "NEW" for these connections. 35523 - If we get a linelist or linelist_s config option from the torrc 35524 (e.g. ExitPolicy) and it has no value, warn and skip rather than 35525 silently resetting it to its default. 35526 - Don't abandon entry guards until they've been down or gone for 35527 a whole month. 35528 - Cleaner and quieter log messages. 35529 35530 o New features: 35531 - New controller signal NEWNYM that makes new application requests 35532 use clean circuits. 35533 - Add a new circuit purpose 'controller' to let the controller ask 35534 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT 35535 controller command to let you specify the purpose if you're 35536 starting a new circuit. Add a new SETCIRCUITPURPOSE controller 35537 command to let you change a circuit's purpose after it's been 35538 created. 35539 - Accept "private:*" in routerdesc exit policies; not generated yet 35540 because older Tors do not understand it. 35541 - Add BSD-style contributed startup script "rc.subr" from Peter 35542 Thoenen. 35543 35544 35545Changes in version 0.1.1.14-alpha - 2006-02-20 35546 o Bugfixes on 0.1.1.x: 35547 - Don't die if we ask for a stdout or stderr log (even implicitly) 35548 and we're set to RunAsDaemon -- just warn. 35549 - We still had a few bugs in the OR connection rotation code that 35550 caused directory servers to slowly aggregate connections to other 35551 fast Tor servers. This time for sure! 35552 - Make log entries on Win32 include the name of the function again. 35553 - We were treating a pair of exit policies if they were equal even 35554 if one said accept and the other said reject -- causing us to 35555 not always publish a new descriptor since we thought nothing 35556 had changed. 35557 - Retry pending server downloads as well as pending networkstatus 35558 downloads when we unexpectedly get a socks request. 35559 - We were ignoring the IS_FAST flag in the directory status, 35560 meaning we were willing to pick trivial-bandwidth nodes for "fast" 35561 connections. 35562 - If the controller's SAVECONF command fails (e.g. due to file 35563 permissions), let the controller know that it failed. 35564 35565 o Features: 35566 - If we're trying to be a Tor server and running Windows 95/98/ME 35567 as a server, explain that we'll likely crash. 35568 - When we're a server, a client asks for an old-style directory, 35569 and our write bucket is empty, don't give it to him. This way 35570 small servers can continue to serve the directory *sometimes*, 35571 without getting overloaded. 35572 - Compress exit policies even more -- look for duplicate lines 35573 and remove them. 35574 - Clients now honor the "guard" flag in the router status when 35575 picking entry guards, rather than looking at is_fast or is_stable. 35576 - Retain unrecognized lines in $DATADIR/state file, so that we can 35577 be forward-compatible. 35578 - Generate 18.0.0.0/8 address policy format in descs when we can; 35579 warn when the mask is not reducible to a bit-prefix. 35580 - Let the user set ControlListenAddress in the torrc. This can be 35581 dangerous, but there are some cases (like a secured LAN) where it 35582 makes sense. 35583 - Split ReachableAddresses into ReachableDirAddresses and 35584 ReachableORAddresses, so we can restrict Dir conns to port 80 35585 and OR conns to port 443. 35586 - Now we can target arch and OS in rpm builds (contributed by 35587 Phobos). Also make the resulting dist-rpm filename match the 35588 target arch. 35589 - New config options to help controllers: FetchServerDescriptors 35590 and FetchHidServDescriptors for whether to fetch server 35591 info and hidserv info or let the controller do it, and 35592 PublishServerDescriptor and PublishHidServDescriptors. 35593 - Also let the controller set the __AllDirActionsPrivate config 35594 option if you want all directory fetches/publishes to happen via 35595 Tor (it assumes your controller bootstraps your circuits). 35596 35597 35598Changes in version 0.1.0.17 - 2006-02-17 35599 o Crash bugfixes on 0.1.0.x: 35600 - When servers with a non-zero DirPort came out of hibernation, 35601 sometimes they would trigger an assert. 35602 35603 o Other important bugfixes: 35604 - On platforms that don't have getrlimit (like Windows), we were 35605 artificially constraining ourselves to a max of 1024 35606 connections. Now just assume that we can handle as many as 15000 35607 connections. Hopefully this won't cause other problems. 35608 35609 o Backported features: 35610 - When we're a server, a client asks for an old-style directory, 35611 and our write bucket is empty, don't give it to him. This way 35612 small servers can continue to serve the directory *sometimes*, 35613 without getting overloaded. 35614 - Whenever you get a 503 in response to a directory fetch, try 35615 once more. This will become important once servers start sending 35616 503's whenever they feel busy. 35617 - Fetch a new directory every 120 minutes, not every 40 minutes. 35618 Now that we have hundreds of thousands of users running the old 35619 directory algorithm, it's starting to hurt a lot. 35620 - Bump up the period for forcing a hidden service descriptor upload 35621 from 20 minutes to 1 hour. 35622 35623 35624Changes in version 0.1.1.13-alpha - 2006-02-09 35625 o Crashes in 0.1.1.x: 35626 - When you tried to setconf ORPort via the controller, Tor would 35627 crash. So people using TorCP to become a server were sad. 35628 - Solve (I hope) the stack-smashing bug that we were seeing on fast 35629 servers. The problem appears to be something do with OpenSSL's 35630 random number generation, or how we call it, or something. Let me 35631 know if the crashes continue. 35632 - Turn crypto hardware acceleration off by default, until we find 35633 somebody smart who can test it for us. (It appears to produce 35634 seg faults in at least some cases.) 35635 - Fix a rare assert error when we've tried all intro points for 35636 a hidden service and we try fetching the service descriptor again: 35637 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed" 35638 35639 o Major fixes: 35640 - Fix a major load balance bug: we were round-robining in 16 KB 35641 chunks, and servers with bandwidthrate of 20 KB, while downloading 35642 a 600 KB directory, would starve their other connections. Now we 35643 try to be a bit more fair. 35644 - Dir authorities and mirrors were never expiring the newest 35645 descriptor for each server, causing memory and directory bloat. 35646 - Fix memory-bloating and connection-bloating bug on servers: We 35647 were never closing any connection that had ever had a circuit on 35648 it, because we were checking conn->n_circuits == 0, yet we had a 35649 bug that let it go negative. 35650 - Make Tor work using squid as your http proxy again -- squid 35651 returns an error if you ask for a URL that's too long, and it uses 35652 a really generic error message. Plus, many people are behind a 35653 transparent squid so they don't even realize it. 35654 - On platforms that don't have getrlimit (like Windows), we were 35655 artificially constraining ourselves to a max of 1024 35656 connections. Now just assume that we can handle as many as 15000 35657 connections. Hopefully this won't cause other problems. 35658 - Add a new config option ExitPolicyRejectPrivate which defaults to 35659 1. This means all exit policies will begin with rejecting private 35660 addresses, unless the server operator explicitly turns it off. 35661 35662 o Major features: 35663 - Clients no longer download descriptors for non-running 35664 descriptors. 35665 - Before we add new directory authorities, we should make it 35666 clear that only v1 authorities should receive/publish hidden 35667 service descriptors. 35668 35669 o Minor features: 35670 - As soon as we've fetched some more directory info, immediately 35671 try to download more server descriptors. This way we don't have 35672 a 10 second pause during initial bootstrapping. 35673 - Remove even more loud log messages that the server operator can't 35674 do anything about. 35675 - When we're running an obsolete or un-recommended version, make 35676 the log message more clear about what the problem is and what 35677 versions *are* still recommended. 35678 - Provide a more useful warn message when our onion queue gets full: 35679 the CPU is too slow or the exit policy is too liberal. 35680 - Don't warn when we receive a 503 from a dirserver/cache -- this 35681 will pave the way for them being able to refuse if they're busy. 35682 - When we fail to bind a listener, try to provide a more useful 35683 log message: e.g., "Is Tor already running?" 35684 - Adjust tor-spec to parameterize cell and key lengths. Now Ian 35685 Goldberg can prove things about our handshake protocol more 35686 easily. 35687 - MaxConn has been obsolete for a while now. Document the ConnLimit 35688 config option, which is a *minimum* number of file descriptors 35689 that must be available else Tor refuses to start. 35690 - Apply Matt Ghali's --with-syslog-facility patch to ./configure 35691 if you log to syslog and want something other than LOG_DAEMON. 35692 - Make dirservers generate a separate "guard" flag to mean, 35693 "would make a good entry guard". Make clients parse it and vote 35694 on it. Not used by clients yet. 35695 - Implement --with-libevent-dir option to ./configure. Also, improve 35696 search techniques to find libevent, and use those for openssl too. 35697 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB 35698 - Only start testing reachability once we've established a 35699 circuit. This will make startup on dirservers less noisy. 35700 - Don't try to upload hidden service descriptors until we have 35701 established a circuit. 35702 - Fix the controller's "attachstream 0" command to treat conn like 35703 it just connected, doing address remapping, handling .exit and 35704 .onion idioms, and so on. Now we're more uniform in making sure 35705 that the controller hears about new and closing connections. 35706 35707 35708Changes in version 0.1.1.12-alpha - 2006-01-11 35709 o Bugfixes on 0.1.1.x: 35710 - The fix to close duplicate server connections was closing all 35711 Tor client connections if they didn't establish a circuit 35712 quickly enough. Oops. 35713 - Fix minor memory issue (double-free) that happened on exit. 35714 35715 o Bugfixes on 0.1.0.x: 35716 - Tor didn't warn when it failed to open a log file. 35717 35718 35719Changes in version 0.1.1.11-alpha - 2006-01-10 35720 o Crashes in 0.1.1.x: 35721 - Include all the assert/crash fixes from 0.1.0.16. 35722 - If you start Tor and then quit very quickly, there were some 35723 races that tried to free things that weren't allocated yet. 35724 - Fix a rare memory stomp if you're running hidden services. 35725 - Fix segfault when specifying DirServer in config without nickname. 35726 - Fix a seg fault when you finish connecting to a server but at 35727 that moment you dump his server descriptor. 35728 - Extendcircuit and Attachstream controller commands would 35729 assert/crash if you don't give them enough arguments. 35730 - Fix an assert error when we're out of space in the connection_list 35731 and we try to post a hidden service descriptor (reported by weasel). 35732 - If you specify a relative torrc path and you set RunAsDaemon in 35733 your torrc, then it chdir()'s to the new directory. If you HUP, 35734 it tries to load the new torrc location, fails, and exits. 35735 The fix: no longer allow a relative path to torrc using -f. 35736 35737 o Major features: 35738 - Implement "entry guards": automatically choose a handful of entry 35739 nodes and stick with them for all circuits. Only pick new guards 35740 when the ones you have are unsuitable, and if the old guards 35741 become suitable again, switch back. This will increase security 35742 dramatically against certain end-point attacks. The EntryNodes 35743 config option now provides some hints about which entry guards you 35744 want to use most; and StrictEntryNodes means to only use those. 35745 - New directory logic: download by descriptor digest, not by 35746 fingerprint. Caches try to download all listed digests from 35747 authorities; clients try to download "best" digests from caches. 35748 This avoids partitioning and isolating attacks better. 35749 - Make the "stable" router flag in network-status be the median of 35750 the uptimes of running valid servers, and make clients pay 35751 attention to the network-status flags. Thus the cutoff adapts 35752 to the stability of the network as a whole, making IRC, IM, etc 35753 connections more reliable. 35754 35755 o Major fixes: 35756 - Tor servers with dynamic IP addresses were needing to wait 18 35757 hours before they could start doing reachability testing using 35758 the new IP address and ports. This is because they were using 35759 the internal descriptor to learn what to test, yet they were only 35760 rebuilding the descriptor once they decided they were reachable. 35761 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients 35762 to download certain server descriptors, throw them away, and then 35763 fetch them again after 30 minutes. Now mirrors throw away these 35764 server descriptors so clients can't get them. 35765 - We were leaving duplicate connections to other ORs open for a week, 35766 rather than closing them once we detect a duplicate. This only 35767 really affected authdirservers, but it affected them a lot. 35768 - Spread the authdirservers' reachability testing over the entire 35769 testing interval, so we don't try to do 500 TLS's at once every 35770 20 minutes. 35771 35772 o Minor fixes: 35773 - If the network is down, and we try to connect to a conn because 35774 we have a circuit in mind, and we timeout (30 seconds) because the 35775 network never answers, we were expiring the circuit, but we weren't 35776 obsoleting the connection or telling the entry_guards functions. 35777 - Some Tor servers process billions of cells per day. These statistics 35778 need to be uint64_t's. 35779 - Check for integer overflows in more places, when adding elements 35780 to smartlists. This could possibly prevent a buffer overflow 35781 on malicious huge inputs. I don't see any, but I haven't looked 35782 carefully. 35783 - ReachableAddresses kept growing new "reject *:*" lines on every 35784 setconf/reload. 35785 - When you "setconf log" via the controller, it should remove all 35786 logs. We were automatically adding back in a "log notice stdout". 35787 - Newly bootstrapped Tor networks couldn't establish hidden service 35788 circuits until they had nodes with high uptime. Be more tolerant. 35789 - We were marking servers down when they could not answer every piece 35790 of the directory request we sent them. This was far too harsh. 35791 - Fix the torify (tsocks) config file to not use Tor for localhost 35792 connections. 35793 - Directory authorities now go to the proper authority when asking for 35794 a networkstatus, even when they want a compressed one. 35795 - Fix a harmless bug that was causing Tor servers to log 35796 "Got an end because of misc error, but we're not an AP. Closing." 35797 - Authorities were treating their own descriptor changes as cosmetic, 35798 meaning the descriptor available in the network-status and the 35799 descriptor that clients downloaded were different. 35800 - The OS X installer was adding a symlink for tor_resolve but 35801 the binary was called tor-resolve (reported by Thomas Hardly). 35802 - Workaround a problem with some http proxies where they refuse GET 35803 requests that specify "Content-Length: 0" (reported by Adrian). 35804 - Fix wrong log message when you add a "HiddenServiceNodes" config 35805 line without any HiddenServiceDir line (reported by Chris Thomas). 35806 35807 o Minor features: 35808 - Write the TorVersion into the state file so we have a prayer of 35809 keeping forward and backward compatibility. 35810 - Revive the FascistFirewall config option rather than eliminating it: 35811 now it's a synonym for ReachableAddresses *:80,*:443. 35812 - Clients choose directory servers from the network status lists, 35813 not from their internal list of router descriptors. Now they can 35814 go to caches directly rather than needing to go to authorities 35815 to bootstrap. 35816 - Directory authorities ignore router descriptors that have only 35817 cosmetic differences: do this for 0.1.0.x servers now too. 35818 - Add a new flag to network-status indicating whether the server 35819 can answer v2 directory requests too. 35820 - Authdirs now stop whining so loudly about bad descriptors that 35821 they fetch from other dirservers. So when there's a log complaint, 35822 it's for sure from a freshly uploaded descriptor. 35823 - Reduce memory requirements in our structs by changing the order 35824 of fields. 35825 - There used to be two ways to specify your listening ports in a 35826 server descriptor: on the "router" line and with a separate "ports" 35827 line. Remove support for the "ports" line. 35828 - New config option "AuthDirRejectUnlisted" for auth dirservers as 35829 a panic button: if we get flooded with unusable servers we can 35830 revert to only listing servers in the approved-routers file. 35831 - Auth dir servers can now mark a fingerprint as "!reject" or 35832 "!invalid" in the approved-routers file (as its nickname), to 35833 refuse descriptors outright or include them but marked as invalid. 35834 - Servers store bandwidth history across restarts/crashes. 35835 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can 35836 get a better idea of why their circuits failed. Not used yet. 35837 - Directory mirrors now cache up to 16 unrecognized network-status 35838 docs. Now we can add new authdirservers and they'll be cached too. 35839 - When picking a random directory, prefer non-authorities if any 35840 are known. 35841 - New controller option "getinfo desc/all-recent" to fetch the 35842 latest server descriptor for every router that Tor knows about. 35843 35844 35845Changes in version 0.1.0.16 - 2006-01-02 35846 o Crash bugfixes on 0.1.0.x: 35847 - On Windows, build with a libevent patch from "I-M Weasel" to avoid 35848 corrupting the heap, losing FDs, or crashing when we need to resize 35849 the fd_sets. (This affects the Win32 binaries, not Tor's sources.) 35850 - It turns out sparc64 platforms crash on unaligned memory access 35851 too -- so detect and avoid this. 35852 - Handle truncated compressed data correctly (by detecting it and 35853 giving an error). 35854 - Fix possible-but-unlikely free(NULL) in control.c. 35855 - When we were closing connections, there was a rare case that 35856 stomped on memory, triggering seg faults and asserts. 35857 - Avoid potential infinite recursion when building a descriptor. (We 35858 don't know that it ever happened, but better to fix it anyway.) 35859 - We were neglecting to unlink marked circuits from soon-to-close OR 35860 connections, which caused some rare scribbling on freed memory. 35861 - Fix a memory stomping race bug when closing the joining point of two 35862 rendezvous circuits. 35863 - Fix an assert in time parsing found by Steven Murdoch. 35864 35865 o Other bugfixes on 0.1.0.x: 35866 - When we're doing reachability testing, provide more useful log 35867 messages so the operator knows what to expect. 35868 - Do not check whether DirPort is reachable when we are suppressing 35869 advertising it because of hibernation. 35870 - When building with -static or on Solaris, we sometimes needed -ldl. 35871 - When we're deciding whether a stream has enough circuits around 35872 that can handle it, count the freshly dirty ones and not the ones 35873 that are so dirty they won't be able to handle it. 35874 - When we're expiring old circuits, we had a logic error that caused 35875 us to close new rendezvous circuits rather than old ones. 35876 - Give a more helpful log message when you try to change ORPort via 35877 the controller: you should upgrade Tor if you want that to work. 35878 - We were failing to parse Tor versions that start with "Tor ". 35879 - Tolerate faulty streams better: when a stream fails for reason 35880 exitpolicy, stop assuming that the router is lying about his exit 35881 policy. When a stream fails for reason misc, allow it to retry just 35882 as if it was resolvefailed. When a stream has failed three times, 35883 reset its failure count so we can try again and get all three tries. 35884 35885 35886Changes in version 0.1.1.10-alpha - 2005-12-11 35887 o Correctness bugfixes on 0.1.0.x: 35888 - On Windows, build with a libevent patch from "I-M Weasel" to avoid 35889 corrupting the heap, losing FDs, or crashing when we need to resize 35890 the fd_sets. (This affects the Win32 binaries, not Tor's sources.) 35891 - Stop doing the complex voodoo overkill checking for insecure 35892 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy. 35893 - When we were closing connections, there was a rare case that 35894 stomped on memory, triggering seg faults and asserts. 35895 - We were neglecting to unlink marked circuits from soon-to-close OR 35896 connections, which caused some rare scribbling on freed memory. 35897 - When we're deciding whether a stream has enough circuits around 35898 that can handle it, count the freshly dirty ones and not the ones 35899 that are so dirty they won't be able to handle it. 35900 - Recover better from TCP connections to Tor servers that are 35901 broken but don't tell you (it happens!); and rotate TLS 35902 connections once a week. 35903 - When we're expiring old circuits, we had a logic error that caused 35904 us to close new rendezvous circuits rather than old ones. 35905 - Fix a scary-looking but apparently harmless bug where circuits 35906 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at 35907 servers, and never switch to state CIRCUIT_STATE_OPEN. 35908 - When building with -static or on Solaris, we sometimes needed to 35909 build with -ldl. 35910 - Give a useful message when people run Tor as the wrong user, 35911 rather than telling them to start chowning random directories. 35912 - We were failing to inform the controller about new .onion streams. 35913 35914 o Security bugfixes on 0.1.0.x: 35915 - Refuse server descriptors if the fingerprint line doesn't match 35916 the included identity key. Tor doesn't care, but other apps (and 35917 humans) might actually be trusting the fingerprint line. 35918 - We used to kill the circuit when we receive a relay command we 35919 don't recognize. Now we just drop it. 35920 - Start obeying our firewall options more rigorously: 35921 . If we can't get to a dirserver directly, try going via Tor. 35922 . Don't ever try to connect (as a client) to a place our 35923 firewall options forbid. 35924 . If we specify a proxy and also firewall options, obey the 35925 firewall options even when we're using the proxy: some proxies 35926 can only proxy to certain destinations. 35927 - Fix a bug found by Lasse Overlier: when we were making internal 35928 circuits (intended to be cannibalized later for rendezvous and 35929 introduction circuits), we were picking them so that they had 35930 useful exit nodes. There was no need for this, and it actually 35931 aids some statistical attacks. 35932 - Start treating internal circuits and exit circuits separately. 35933 It's important to keep them separate because internal circuits 35934 have their last hops picked like middle hops, rather than like 35935 exit hops. So exiting on them will break the user's expectations. 35936 35937 o Bugfixes on 0.1.1.x: 35938 - Take out the mis-feature where we tried to detect IP address 35939 flapping for people with DynDNS, and chose not to upload a new 35940 server descriptor sometimes. 35941 - Try to be compatible with OpenSSL 0.9.6 again. 35942 - Log fix: when the controller is logging about .onion addresses, 35943 sometimes it didn't include the ".onion" part of the address. 35944 - Don't try to modify options->DirServers internally -- if the 35945 user didn't specify any, just add the default ones directly to 35946 the trusted dirserver list. This fixes a bug where people running 35947 controllers would use SETCONF on some totally unrelated config 35948 option, and Tor would start yelling at them about changing their 35949 DirServer lines. 35950 - Let the controller's redirectstream command specify a port, in 35951 case the controller wants to change that too. 35952 - When we requested a pile of server descriptors, we sometimes 35953 accidentally launched a duplicate request for the first one. 35954 - Bugfix for trackhostexits: write down the fingerprint of the 35955 chosen exit, not its nickname, because the chosen exit might not 35956 be verified. 35957 - When parsing foo.exit, if foo is unknown, and we are leaving 35958 circuits unattached, set the chosen_exit field and leave the 35959 address empty. This matters because controllers got confused 35960 otherwise. 35961 - Directory authorities no longer try to download server 35962 descriptors that they know they will reject. 35963 35964 o Features and updates: 35965 - Replace balanced trees with hash tables: this should make stuff 35966 significantly faster. 35967 - Resume using the AES counter-mode implementation that we ship, 35968 rather than OpenSSL's. Ours is significantly faster. 35969 - Many other CPU and memory improvements. 35970 - Add a new config option FastFirstHopPK (on by default) so clients 35971 do a trivial crypto handshake for their first hop, since TLS has 35972 already taken care of confidentiality and authentication. 35973 - Add a new config option TestSocks so people can see if their 35974 applications are using socks4, socks4a, socks5-with-ip, or 35975 socks5-with-hostname. This way they don't have to keep mucking 35976 with tcpdump and wondering if something got cached somewhere. 35977 - Warn when listening on a public address for socks. I suspect a 35978 lot of people are setting themselves up as open socks proxies, 35979 and they have no idea that jerks on the Internet are using them, 35980 since they simply proxy the traffic into the Tor network. 35981 - Add "private:*" as an alias in configuration for policies. Now 35982 you can simplify your exit policy rather than needing to list 35983 every single internal or nonroutable network space. 35984 - Add a new controller event type that allows controllers to get 35985 all server descriptors that were uploaded to a router in its role 35986 as authoritative dirserver. 35987 - Start shipping socks-extensions.txt, tor-doc-unix.html, 35988 tor-doc-server.html, and stylesheet.css in the tarball. 35989 - Stop shipping tor-doc.html in the tarball. 35990 35991 35992Changes in version 0.1.1.9-alpha - 2005-11-15 35993 o Usability improvements: 35994 - Start calling it FooListenAddress rather than FooBindAddress, 35995 since few of our users know what it means to bind an address 35996 or port. 35997 - Reduce clutter in server logs. We're going to try to make 35998 them actually usable now. New config option ProtocolWarnings that 35999 lets you hear about how _other Tors_ are breaking the protocol. Off 36000 by default. 36001 - Divide log messages into logging domains. Once we put some sort 36002 of interface on this, it will let people looking at more verbose 36003 log levels specify the topics they want to hear more about. 36004 - Make directory servers return better http 404 error messages 36005 instead of a generic "Servers unavailable". 36006 - Check for even more Windows version flags when writing the platform 36007 string in server descriptors, and note any we don't recognize. 36008 - Clean up more of the OpenSSL memory when exiting, so we can detect 36009 memory leaks better. 36010 - Make directory authorities be non-versioning, non-naming by 36011 default. Now we can add new directory servers without requiring 36012 their operators to pay close attention. 36013 - When logging via syslog, include the pid whenever we provide 36014 a log entry. Suggested by Todd Fries. 36015 36016 o Performance improvements: 36017 - Directory servers now silently throw away new descriptors that 36018 haven't changed much if the timestamps are similar. We do this to 36019 tolerate older Tor servers that upload a new descriptor every 15 36020 minutes. (It seemed like a good idea at the time.) 36021 - Inline bottleneck smartlist functions; use fast versions by default. 36022 - Add a "Map from digest to void*" abstraction digestmap_t so we 36023 can do less hex encoding/decoding. Use it in router_get_by_digest() 36024 to resolve a performance bottleneck. 36025 - Allow tor_gzip_uncompress to extract as much as possible from 36026 truncated compressed data. Try to extract as many 36027 descriptors as possible from truncated http responses (when 36028 DIR_PURPOSE_FETCH_ROUTERDESC). 36029 - Make circ->onionskin a pointer, not a static array. moria2 was using 36030 125000 circuit_t's after it had been up for a few weeks, which 36031 translates to 20+ megs of wasted space. 36032 - The private half of our EDH handshake keys are now chosen out 36033 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.) 36034 36035 o Security improvements: 36036 - Start making directory caches retain old routerinfos, so soon 36037 clients can start asking by digest of descriptor rather than by 36038 fingerprint of server. 36039 - Add half our entropy from RAND_poll in OpenSSL. This knows how 36040 to use egd (if present), openbsd weirdness (if present), vms/os2 36041 weirdness (if we ever port there), and more in the future. 36042 36043 o Bugfixes on 0.1.0.x: 36044 - Do round-robin writes of at most 16 kB per write. This might be 36045 more fair on loaded Tor servers, and it might resolve our Windows 36046 crash bug. It might also slow things down. 36047 - Our TLS handshakes were generating a single public/private 36048 keypair for the TLS context, rather than making a new one for 36049 each new connections. Oops. (But we were still rotating them 36050 periodically, so it's not so bad.) 36051 - When we were cannibalizing a circuit with a particular exit 36052 node in mind, we weren't checking to see if that exit node was 36053 already present earlier in the circuit. Oops. 36054 - When a Tor server's IP changes (e.g. from a dyndns address), 36055 upload a new descriptor so clients will learn too. 36056 - Really busy servers were keeping enough circuits open on stable 36057 connections that they were wrapping around the circuit_id 36058 space. (It's only two bytes.) This exposed a bug where we would 36059 feel free to reuse a circuit_id even if it still exists but has 36060 been marked for close. Try to fix this bug. Some bug remains. 36061 - If we would close a stream early (e.g. it asks for a .exit that 36062 we know would refuse it) but the LeaveStreamsUnattached config 36063 option is set by the controller, then don't close it. 36064 36065 o Bugfixes on 0.1.1.8-alpha: 36066 - Fix a big pile of memory leaks, some of them serious. 36067 - Do not try to download a routerdesc if we would immediately reject 36068 it as obsolete. 36069 - Resume inserting a newline between all router descriptors when 36070 generating (old style) signed directories, since our spec says 36071 we do. 36072 - When providing content-type application/octet-stream for 36073 server descriptors using .z, we were leaving out the 36074 content-encoding header. Oops. (Everything tolerated this just 36075 fine, but that doesn't mean we need to be part of the problem.) 36076 - Fix a potential seg fault in getconf and getinfo using version 1 36077 of the controller protocol. 36078 - Avoid crash: do not check whether DirPort is reachable when we 36079 are suppressing it because of hibernation. 36080 - Make --hash-password not crash on exit. 36081 36082 36083Changes in version 0.1.1.8-alpha - 2005-10-07 36084 o New features (major): 36085 - Clients don't download or use the directory anymore. Now they 36086 download and use network-statuses from the trusted dirservers, 36087 and fetch individual server descriptors as needed from mirrors. 36088 See dir-spec.txt for all the gory details. 36089 - Be more conservative about whether to advertise our DirPort. 36090 The main change is to not advertise if we're running at capacity 36091 and either a) we could hibernate or b) our capacity is low and 36092 we're using a default DirPort. 36093 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later. 36094 36095 o New features (minor): 36096 - Try to be smart about when to retry network-status and 36097 server-descriptor fetches. Still needs some tuning. 36098 - Stop parsing, storing, or using running-routers output (but 36099 mirrors still cache and serve it). 36100 - Consider a threshold of versioning dirservers (dirservers who have 36101 an opinion about which Tor versions are still recommended) before 36102 deciding whether to warn the user that he's obsolete. 36103 - Dirservers can now reject/invalidate by key and IP, with the 36104 config options "AuthDirInvalid" and "AuthDirReject". This is 36105 useful since currently we automatically list servers as running 36106 and usable even if we know they're jerks. 36107 - Provide dire warnings to any users who set DirServer; move it out 36108 of torrc.sample and into torrc.complete. 36109 - Add MyFamily to torrc.sample in the server section. 36110 - Add nicknames to the DirServer line, so we can refer to them 36111 without requiring all our users to memorize their IP addresses. 36112 - When we get an EOF or a timeout on a directory connection, note 36113 how many bytes of serverdesc we are dropping. This will help 36114 us determine whether it is smart to parse incomplete serverdesc 36115 responses. 36116 - Add a new function to "change pseudonyms" -- that is, to stop 36117 using any currently-dirty circuits for new streams, so we don't 36118 link new actions to old actions. Currently it's only called on 36119 HUP (or SIGNAL RELOAD). 36120 - On sighup, if UseHelperNodes changed to 1, use new circuits. 36121 - Start using RAND_bytes rather than RAND_pseudo_bytes from 36122 OpenSSL. Also, reseed our entropy every hour, not just at 36123 startup. And entropy in 512-bit chunks, not 160-bit chunks. 36124 36125 o Fixes on 0.1.1.7-alpha: 36126 - Nobody ever implemented EVENT_ADDRMAP for control protocol 36127 version 0, so don't let version 0 controllers ask for it. 36128 - If you requested something with too many newlines via the 36129 v1 controller protocol, you could crash tor. 36130 - Fix a number of memory leaks, including some pretty serious ones. 36131 - Re-enable DirPort testing again, so Tor servers will be willing 36132 to advertise their DirPort if it's reachable. 36133 - On TLS handshake, only check the other router's nickname against 36134 its expected nickname if is_named is set. 36135 36136 o Fixes forward-ported from 0.1.0.15: 36137 - Don't crash when we don't have any spare file descriptors and we 36138 try to spawn a dns or cpu worker. 36139 - Make the numbers in read-history and write-history into uint64s, 36140 so they don't overflow and publish negatives in the descriptor. 36141 36142 o Fixes on 0.1.0.x: 36143 - For the OS X package's modified privoxy config file, comment 36144 out the "logfile" line so we don't log everything passed 36145 through privoxy. 36146 - We were whining about using socks4 or socks5-with-local-lookup 36147 even when it's an IP in the "virtual" range we designed exactly 36148 for this case. 36149 - We were leaking some memory every time the client changes IPs. 36150 - Never call free() on tor_malloc()d memory. This will help us 36151 use dmalloc to detect memory leaks. 36152 - Check for named servers when looking them up by nickname; 36153 warn when we'recalling a non-named server by its nickname; 36154 don't warn twice about the same name. 36155 - Try to list MyFamily elements by key, not by nickname, and warn 36156 if we've not heard of the server. 36157 - Make windows platform detection (uname equivalent) smarter. 36158 - It turns out sparc64 doesn't like unaligned access either. 36159 36160 36161Changes in version 0.1.0.15 - 2005-09-23 36162 o Bugfixes on 0.1.0.x: 36163 - Reject ports 465 and 587 (spam targets) in default exit policy. 36164 - Don't crash when we don't have any spare file descriptors and we 36165 try to spawn a dns or cpu worker. 36166 - Get rid of IgnoreVersion undocumented config option, and make us 36167 only warn, never exit, when we're running an obsolete version. 36168 - Don't try to print a null string when your server finds itself to 36169 be unreachable and the Address config option is empty. 36170 - Make the numbers in read-history and write-history into uint64s, 36171 so they don't overflow and publish negatives in the descriptor. 36172 - Fix a minor memory leak in smartlist_string_remove(). 36173 - We were only allowing ourselves to upload a server descriptor at 36174 most every 20 minutes, even if it changed earlier than that. 36175 - Clean up log entries that pointed to old URLs. 36176 36177 36178Changes in version 0.1.1.7-alpha - 2005-09-14 36179 o Fixes on 0.1.1.6-alpha: 36180 - Exit servers were crashing when people asked them to make a 36181 connection to an address not in their exit policy. 36182 - Looking up a non-existent stream for a v1 control connection would 36183 cause a segfault. 36184 - Fix a seg fault if we ask a dirserver for a descriptor by 36185 fingerprint but he doesn't know about him. 36186 - SETCONF was appending items to linelists, not clearing them. 36187 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back 36188 out and refuse the setconf if it would fail. 36189 - Downgrade the dirserver log messages when whining about 36190 unreachability. 36191 36192 o New features: 36193 - Add Peter Palfrader's check-tor script to tor/contrib/ 36194 It lets you easily check whether a given server (referenced by 36195 nickname) is reachable by you. 36196 - Numerous changes to move towards client-side v2 directories. Not 36197 enabled yet. 36198 36199 o Fixes on 0.1.0.x: 36200 - If the user gave tor an odd number of command-line arguments, 36201 we were silently ignoring the last one. Now we complain and fail. 36202 [This wins the oldest-bug prize -- this bug has been present since 36203 November 2002, as released in Tor 0.0.0.] 36204 - Do not use unaligned memory access on alpha, mips, or mipsel. 36205 It *works*, but is very slow, so we treat them as if it doesn't. 36206 - Retry directory requests if we fail to get an answer we like 36207 from a given dirserver (we were retrying before, but only if 36208 we fail to connect). 36209 - When writing the RecommendedVersions line, sort them first. 36210 - When the client asked for a rendezvous port that the hidden 36211 service didn't want to provide, we were sending an IP address 36212 back along with the end cell. Fortunately, it was zero. But stop 36213 that anyway. 36214 - Correct "your server is reachable" log entries to indicate that 36215 it was self-testing that told us so. 36216 36217 36218Changes in version 0.1.1.6-alpha - 2005-09-09 36219 o Fixes on 0.1.1.5-alpha: 36220 - We broke fascistfirewall in 0.1.1.5-alpha. Oops. 36221 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops. 36222 - Fix bug with tor_memmem finding a match at the end of the string. 36223 - Make unit tests run without segfaulting. 36224 - Resolve some solaris x86 compile warnings. 36225 - Handle duplicate lines in approved-routers files without warning. 36226 - Fix bug where as soon as a server refused any requests due to his 36227 exit policy (e.g. when we ask for localhost and he tells us that's 36228 127.0.0.1 and he won't do it), we decided he wasn't obeying his 36229 exit policy using him for any exits. 36230 - Only do openssl hardware accelerator stuff if openssl version is 36231 at least 0.9.7. 36232 36233 o New controller features/fixes: 36234 - Add a "RESETCONF" command so you can set config options like 36235 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give 36236 a config option in the torrc with no value, then it clears it 36237 entirely (rather than setting it to its default). 36238 - Add a "GETINFO config-file" to tell us where torrc is. 36239 - Avoid sending blank lines when GETINFO replies should be empty. 36240 - Add a QUIT command for the controller (for using it manually). 36241 - Fix a bug in SAVECONF that was adding default dirservers and 36242 other redundant entries to the torrc file. 36243 36244 o Start on the new directory design: 36245 - Generate, publish, cache, serve new network-status format. 36246 - Publish individual descriptors (by fingerprint, by "all", and by 36247 "tell me yours"). 36248 - Publish client and server recommended versions separately. 36249 - Allow tor_gzip_uncompress() to handle multiple concatenated 36250 compressed strings. Serve compressed groups of router 36251 descriptors. The compression logic here could be more 36252 memory-efficient. 36253 - Distinguish v1 authorities (all currently trusted directories) 36254 from v2 authorities (all trusted directories). 36255 - Change DirServers config line to note which dirs are v1 authorities. 36256 - Add configuration option "V1AuthoritativeDirectory 1" which 36257 moria1, moria2, and tor26 should set. 36258 - Remove option when getting directory cache to see whether they 36259 support running-routers; they all do now. Replace it with one 36260 to see whether caches support v2 stuff. 36261 36262 o New features: 36263 - Dirservers now do their own external reachability testing of each 36264 Tor server, and only list them as running if they've been found to 36265 be reachable. We also send back warnings to the server's logs if 36266 it uploads a descriptor that we already believe is unreachable. 36267 - Implement exit enclaves: if we know an IP address for the 36268 destination, and there's a running Tor server at that address 36269 which allows exit to the destination, then extend the circuit to 36270 that exit first. This provides end-to-end encryption and end-to-end 36271 authentication. Also, if the user wants a .exit address or enclave, 36272 use 4 hops rather than 3, and cannibalize a general circ for it 36273 if you can. 36274 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the 36275 controller. Also, rotate dns and cpu workers if the controller 36276 changes options that will affect them; and initialize the dns 36277 worker cache tree whether or not we start out as a server. 36278 - Only upload a new server descriptor when options change, 18 36279 hours have passed, uptime is reset, or bandwidth changes a lot. 36280 - Check [X-]Forwarded-For headers in HTTP requests when generating 36281 log messages. This lets people run dirservers (and caches) behind 36282 Apache but still know which IP addresses are causing warnings. 36283 36284 o Config option changes: 36285 - Replace (Fascist)Firewall* config options with a new 36286 ReachableAddresses option that understands address policies. 36287 For example, "ReachableAddresses *:80,*:443" 36288 - Get rid of IgnoreVersion undocumented config option, and make us 36289 only warn, never exit, when we're running an obsolete version. 36290 - Make MonthlyAccountingStart config option truly obsolete now. 36291 36292 o Fixes on 0.1.0.x: 36293 - Reject ports 465 and 587 in the default exit policy, since 36294 people have started using them for spam too. 36295 - It turns out we couldn't bootstrap a network since we added 36296 reachability detection in 0.1.0.1-rc. Good thing the Tor network 36297 has never gone down. Add an AssumeReachable config option to let 36298 servers and dirservers bootstrap. When we're trying to build a 36299 high-uptime or high-bandwidth circuit but there aren't enough 36300 suitable servers, try being less picky rather than simply failing. 36301 - Our logic to decide if the OR we connected to was the right guy 36302 was brittle and maybe open to a mitm for unverified routers. 36303 - We weren't cannibalizing circuits correctly for 36304 CIRCUIT_PURPOSE_C_ESTABLISH_REND and 36305 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to 36306 build those from scratch. This should make hidden services faster. 36307 - Predict required circuits better, with an eye toward making hidden 36308 services faster on the service end. 36309 - Retry streams if the exit node sends back a 'misc' failure. This 36310 should result in fewer random failures. Also, after failing 36311 from resolve failed or misc, reset the num failures, so we give 36312 it a fair shake next time we try. 36313 - Clean up the rendezvous warn log msgs, and downgrade some to info. 36314 - Reduce severity on logs about dns worker spawning and culling. 36315 - When we're shutting down and we do something like try to post a 36316 server descriptor or rendezvous descriptor, don't complain that 36317 we seem to be unreachable. Of course we are, we're shutting down. 36318 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells. 36319 We don't use them yet, but maybe one day our DNS resolver will be 36320 able to discover them. 36321 - Make ContactInfo mandatory for authoritative directory servers. 36322 - Require server descriptors to list IPv4 addresses -- hostnames 36323 are no longer allowed. This also fixes some potential security 36324 problems with people providing hostnames as their address and then 36325 preferentially resolving them to partition users. 36326 - Change log line for unreachability to explicitly suggest /etc/hosts 36327 as the culprit. Also make it clearer what IP address and ports we're 36328 testing for reachability. 36329 - Put quotes around user-supplied strings when logging so users are 36330 more likely to realize if they add bad characters (like quotes) 36331 to the torrc. 36332 - Let auth dir servers start without specifying an Address config 36333 option. 36334 - Make unit tests (and other invocations that aren't the real Tor) 36335 run without launching listeners, creating subdirectories, and so on. 36336 36337 36338Changes in version 0.1.1.5-alpha - 2005-08-08 36339 o Bugfixes included in 0.1.0.14. 36340 36341 o Bugfixes on 0.1.0.x: 36342 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your 36343 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668", 36344 it would silently using ignore the 6668. 36345 36346 36347Changes in version 0.1.0.14 - 2005-08-08 36348 o Bugfixes on 0.1.0.x: 36349 - Fix the other half of the bug with crypto handshakes 36350 (CVE-2005-2643). 36351 - Fix an assert trigger if you send a 'signal term' via the 36352 controller when it's listening for 'event info' messages. 36353 36354 36355Changes in version 0.1.1.4-alpha - 2005-08-04 36356 o Bugfixes included in 0.1.0.13. 36357 36358 o Features: 36359 - Improve tor_gettimeofday() granularity on windows. 36360 - Make clients regenerate their keys when their IP address changes. 36361 - Implement some more GETINFO goodness: expose helper nodes, config 36362 options, getinfo keys. 36363 36364 36365Changes in version 0.1.0.13 - 2005-08-04 36366 o Bugfixes on 0.1.0.x: 36367 - Fix a critical bug in the security of our crypto handshakes. 36368 - Fix a size_t underflow in smartlist_join_strings2() that made 36369 it do bad things when you hand it an empty smartlist. 36370 - Fix Windows installer to ship Tor license (thanks to Aphex for 36371 pointing out this oversight) and put a link to the doc directory 36372 in the start menu. 36373 - Explicitly set no-unaligned-access for sparc: it turns out the 36374 new gcc's let you compile broken code, but that doesn't make it 36375 not-broken. 36376 36377 36378Changes in version 0.1.1.3-alpha - 2005-07-23 36379 o Bugfixes on 0.1.1.2-alpha: 36380 - Fix a bug in handling the controller's "post descriptor" 36381 function. 36382 - Fix several bugs in handling the controller's "extend circuit" 36383 function. 36384 - Fix a bug in handling the controller's "stream status" event. 36385 - Fix an assert failure if we have a controller listening for 36386 circuit events and we go offline. 36387 - Re-allow hidden service descriptors to publish 0 intro points. 36388 - Fix a crash when generating your hidden service descriptor if 36389 you don't have enough intro points already. 36390 36391 o New features on 0.1.1.2-alpha: 36392 - New controller function "getinfo accounting", to ask how 36393 many bytes we've used in this time period. 36394 - Experimental support for helper nodes: a lot of the risk from 36395 a small static adversary comes because users pick new random 36396 nodes every time they rebuild a circuit. Now users will try to 36397 stick to the same small set of entry nodes if they can. Not 36398 enabled by default yet. 36399 36400 o Bugfixes on 0.1.0.12: 36401 - If you're an auth dir server, always publish your dirport, 36402 even if you haven't yet found yourself to be reachable. 36403 - Fix a size_t underflow in smartlist_join_strings2() that made 36404 it do bad things when you hand it an empty smartlist. 36405 36406 36407Changes in version 0.1.0.12 - 2005-07-18 36408 o New directory servers: 36409 - tor26 has changed IP address. 36410 36411 o Bugfixes on 0.1.0.x: 36412 - Fix a possible double-free in tor_gzip_uncompress(). 36413 - When --disable-threads is set, do not search for or link against 36414 pthreads libraries. 36415 - Don't trigger an assert if an authoritative directory server 36416 claims its dirport is 0. 36417 - Fix bug with removing Tor as an NT service: some people were 36418 getting "The service did not return an error." Thanks to Matt 36419 Edman for the fix. 36420 36421 36422Changes in version 0.1.1.2-alpha - 2005-07-15 36423 o New directory servers: 36424 - tor26 has changed IP address. 36425 36426 o Bugfixes on 0.1.0.x, crashes/leaks: 36427 - Port the servers-not-obeying-their-exit-policies fix from 36428 0.1.0.11. 36429 - Fix an fd leak in start_daemon(). 36430 - On Windows, you can't always reopen a port right after you've 36431 closed it. So change retry_listeners() to only close and re-open 36432 ports that have changed. 36433 - Fix a possible double-free in tor_gzip_uncompress(). 36434 36435 o Bugfixes on 0.1.0.x, usability: 36436 - When tor_socketpair() fails in Windows, give a reasonable 36437 Windows-style errno back. 36438 - Let people type "tor --install" as well as "tor -install" when 36439 they 36440 want to make it an NT service. 36441 - NT service patch from Matt Edman to improve error messages. 36442 - When the controller asks for a config option with an abbreviated 36443 name, give the full name in our response. 36444 - Correct the man page entry on TrackHostExitsExpire. 36445 - Looks like we were never delivering deflated (i.e. compressed) 36446 running-routers lists, even when asked. Oops. 36447 - When --disable-threads is set, do not search for or link against 36448 pthreads libraries. 36449 36450 o Bugfixes on 0.1.1.x: 36451 - Fix a seg fault with autodetecting which controller version is 36452 being used. 36453 36454 o Features: 36455 - New hidden service descriptor format: put a version in it, and 36456 let people specify introduction/rendezvous points that aren't 36457 in "the directory" (which is subjective anyway). 36458 - Allow the DEBUG controller event to work again. Mark certain log 36459 entries as "don't tell this to controllers", so we avoid cycles. 36460 36461 36462Changes in version 0.1.0.11 - 2005-06-30 36463 o Bugfixes on 0.1.0.x: 36464 - Fix major security bug: servers were disregarding their 36465 exit policies if clients behaved unexpectedly. 36466 - Make OS X init script check for missing argument, so we don't 36467 confuse users who invoke it incorrectly. 36468 - Fix a seg fault in "tor --hash-password foo". 36469 - The MAPADDRESS control command was broken. 36470 36471 36472Changes in version 0.1.1.1-alpha - 2005-06-29 36473 o Bugfixes: 36474 - Make OS X init script check for missing argument, so we don't 36475 confuse users who invoke it incorrectly. 36476 - Fix a seg fault in "tor --hash-password foo". 36477 - Fix a possible way to DoS dirservers. 36478 - When we complain that your exit policy implicitly allows local or 36479 private address spaces, name them explicitly so operators can 36480 fix it. 36481 - Make the log message less scary when all the dirservers are 36482 temporarily unreachable. 36483 - We were printing the number of idle dns workers incorrectly when 36484 culling them. 36485 36486 o Features: 36487 - Revised controller protocol (version 1) that uses ascii rather 36488 than binary. Add supporting libraries in python and java so you 36489 can use the controller from your applications without caring how 36490 our protocol works. 36491 - Spiffy new support for crypto hardware accelerators. Can somebody 36492 test this? 36493 36494 36495Changes in version 0.0.9.10 - 2005-06-16 36496 o Bugfixes on 0.0.9.x (backported from 0.1.0.10): 36497 - Refuse relay cells that claim to have a length larger than the 36498 maximum allowed. This prevents a potential attack that could read 36499 arbitrary memory (e.g. keys) from an exit server's process 36500 (CVE-2005-2050). 36501 36502 36503Changes in version 0.1.0.10 - 2005-06-14 36504 o Allow a few EINVALs from libevent before dying. Warn on kqueue with 36505 libevent before 1.1a. 36506 36507 36508Changes in version 0.1.0.9-rc - 2005-06-09 36509 o Bugfixes: 36510 - Reset buf->highwater every time buf_shrink() is called, not just on 36511 a successful shrink. This was causing significant memory bloat. 36512 - Fix buffer overflow when checking hashed passwords. 36513 - Security fix: if seeding the RNG on Win32 fails, quit. 36514 - Allow seeding the RNG on Win32 even when you're not running as 36515 Administrator. 36516 - Disable threading on Solaris too. Something is wonky with it, 36517 cpuworkers, and reentrant libs. 36518 - Reenable the part of the code that tries to flush as soon as an 36519 OR outbuf has a full TLS record available. Perhaps this will make 36520 OR outbufs not grow as huge except in rare cases, thus saving lots 36521 of CPU time plus memory. 36522 - Reject malformed .onion addresses rather then passing them on as 36523 normal web requests. 36524 - Adapt patch from Adam Langley: fix possible memory leak in 36525 tor_lookup_hostname(). 36526 - Initialize libevent later in the startup process, so the logs are 36527 already established by the time we start logging libevent warns. 36528 - Use correct errno on win32 if libevent fails. 36529 - Check and warn about known-bad/slow libevent versions. 36530 - Pay more attention to the ClientOnly config option. 36531 - Have torctl.in/tor.sh.in check for location of su binary (needed 36532 on FreeBSD) 36533 - Correct/add man page entries for LongLivedPorts, ExitPolicy, 36534 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy, 36535 HttpProxyAuthenticator 36536 - Stop warning about sigpipes in the logs. We're going to 36537 pretend that getting these occasionally is normal and fine. 36538 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in 36539 certain 36540 installer screens; and don't put stuff into StartupItems unless 36541 the user asks you to. 36542 - Require servers that use the default dirservers to have public IP 36543 addresses. We have too many servers that are configured with private 36544 IPs and their admins never notice the log entries complaining that 36545 their descriptors are being rejected. 36546 - Add OSX uninstall instructions. An actual uninstall script will 36547 come later. 36548 36549 36550Changes in version 0.1.0.8-rc - 2005-05-23 36551 o Bugfixes: 36552 - It turns out that kqueue on OS X 10.3.9 was causing kernel 36553 panics. Disable kqueue on all OS X Tors. 36554 - Fix RPM: remove duplicate line accidentally added to the rpm 36555 spec file. 36556 - Disable threads on openbsd too, since its gethostaddr is not 36557 reentrant either. 36558 - Tolerate libevent 0.8 since it still works, even though it's 36559 ancient. 36560 - Enable building on Red Hat 9.0 again. 36561 - Allow the middle hop of the testing circuit to be running any 36562 version, now that most of them have the bugfix to let them connect 36563 to unknown servers. This will allow reachability testing to work 36564 even when 0.0.9.7-0.0.9.9 become obsolete. 36565 - Handle relay cells with rh.length too large. This prevents 36566 a potential attack that could read arbitrary memory (maybe even 36567 keys) from the exit server's process. 36568 - We screwed up the dirport reachability testing when we don't yet 36569 have a cached version of the directory. Hopefully now fixed. 36570 - Clean up router_load_single_router() (used by the controller), 36571 so it doesn't seg fault on error. 36572 - Fix a minor memory leak when somebody establishes an introduction 36573 point at your Tor server. 36574 - If a socks connection ends because read fails, don't warn that 36575 you're not sending a socks reply back. 36576 36577 o Features: 36578 - Add HttpProxyAuthenticator config option too, that works like 36579 the HttpsProxyAuthenticator config option. 36580 - Encode hashed controller passwords in hex instead of base64, 36581 to make it easier to write controllers. 36582 36583 36584Changes in version 0.1.0.7-rc - 2005-05-17 36585 o Bugfixes: 36586 - Fix a bug in the OS X package installer that prevented it from 36587 installing on Tiger. 36588 - Fix a script bug in the OS X package installer that made it 36589 complain during installation. 36590 - Find libevent even if it's hiding in /usr/local/ and your 36591 CFLAGS and LDFLAGS don't tell you to look there. 36592 - Be able to link with libevent as a shared library (the default 36593 after 1.0d), even if it's hiding in /usr/local/lib and even 36594 if you haven't added /usr/local/lib to your /etc/ld.so.conf, 36595 assuming you're running gcc. Otherwise fail and give a useful 36596 error message. 36597 - Fix a bug in the RPM packager: set home directory for _tor to 36598 something more reasonable when first installing. 36599 - Free a minor amount of memory that is still reachable on exit. 36600 36601 36602Changes in version 0.1.0.6-rc - 2005-05-14 36603 o Bugfixes: 36604 - Implement --disable-threads configure option. Disable threads on 36605 netbsd by default, because it appears to have no reentrant resolver 36606 functions. 36607 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent 36608 release (1.1) detects and disables kqueue if it's broken. 36609 - Append default exit policy before checking for implicit internal 36610 addresses. Now we don't log a bunch of complaints on startup 36611 when using the default exit policy. 36612 - Some people were putting "Address " in their torrc, and they had 36613 a buggy resolver that resolved " " to 0.0.0.0. Oops. 36614 - If DataDir is ~/.tor, and that expands to /.tor, then default to 36615 LOCALSTATEDIR/tor instead. 36616 - Fix fragmented-message bug in TorControl.py. 36617 - Resolve a minor bug which would prevent unreachable dirports 36618 from getting suppressed in the published descriptor. 36619 - When the controller gave us a new descriptor, we weren't resolving 36620 it immediately, so Tor would think its address was 0.0.0.0 until 36621 we fetched a new directory. 36622 - Fix an uppercase/lowercase case error in suppressing a bogus 36623 libevent warning on some Linuxes. 36624 36625 o Features: 36626 - Begin scrubbing sensitive strings from logs by default. Turn off 36627 the config option SafeLogging if you need to do debugging. 36628 - Switch to a new buffer management algorithm, which tries to avoid 36629 reallocing and copying quite as much. In first tests it looks like 36630 it uses *more* memory on average, but less cpu. 36631 - First cut at support for "create-fast" cells. Clients can use 36632 these when extending to their first hop, since the TLS already 36633 provides forward secrecy and authentication. Not enabled on 36634 clients yet. 36635 - When dirservers refuse a router descriptor, we now log its 36636 contactinfo, platform, and the poster's IP address. 36637 - Call tor_free_all instead of connections_free_all after forking, to 36638 save memory on systems that need to fork. 36639 - Whine at you if you're a server and you don't set your contactinfo. 36640 - Implement --verify-config command-line option to check if your torrc 36641 is valid without actually launching Tor. 36642 - Rewrite address "serifos.exit" to "localhost.serifos.exit" 36643 rather than just rejecting it. 36644 36645 36646Changes in version 0.1.0.5-rc - 2005-04-27 36647 o Bugfixes: 36648 - Stop trying to print a null pointer if an OR conn fails because 36649 we didn't like its cert. 36650 o Features: 36651 - Switch our internal buffers implementation to use a ring buffer, 36652 to hopefully improve performance for fast servers a lot. 36653 - Add HttpsProxyAuthenticator support (basic auth only), based 36654 on patch from Adam Langley. 36655 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate 36656 the fast servers that have been joining lately. 36657 - Give hidden service accesses extra time on the first attempt, 36658 since 60 seconds is often only barely enough. This might improve 36659 robustness more. 36660 - Improve performance for dirservers: stop re-parsing the whole 36661 directory every time you regenerate it. 36662 - Add more debugging info to help us find the weird dns freebsd 36663 pthreads bug; cleaner debug messages to help track future issues. 36664 36665 36666Changes in version 0.0.9.9 - 2005-04-23 36667 o Bugfixes on 0.0.9.x: 36668 - If unofficial Tor clients connect and send weird TLS certs, our 36669 Tor server triggers an assert. This release contains a minimal 36670 backport from the broader fix that we put into 0.1.0.4-rc. 36671 36672 36673Changes in version 0.1.0.4-rc - 2005-04-23 36674 o Bugfixes: 36675 - If unofficial Tor clients connect and send weird TLS certs, our 36676 Tor server triggers an assert. Stop asserting, and start handling 36677 TLS errors better in other situations too. 36678 - When the controller asks us to tell it about all the debug-level 36679 logs, it turns out we were generating debug-level logs while 36680 telling it about them, which turns into a bad loop. Now keep 36681 track of whether you're sending a debug log to the controller, 36682 and don't log when you are. 36683 - Fix the "postdescriptor" feature of the controller interface: on 36684 non-complete success, only say "done" once. 36685 o Features: 36686 - Clients are now willing to load balance over up to 2mB, not 1mB, 36687 of advertised bandwidth capacity. 36688 - Add a NoPublish config option, so you can be a server (e.g. for 36689 testing running Tor servers in other Tor networks) without 36690 publishing your descriptor to the primary dirservers. 36691 36692 36693Changes in version 0.1.0.3-rc - 2005-04-08 36694 o Improvements on 0.1.0.2-rc: 36695 - Client now retries when streams end early for 'hibernating' or 36696 'resource limit' reasons, rather than failing them. 36697 - More automated handling for dirserver operators: 36698 - Automatically approve nodes running 0.1.0.2-rc or later, 36699 now that the the reachability detection stuff is working. 36700 - Now we allow two unverified servers with the same nickname 36701 but different keys. But if a nickname is verified, only that 36702 nickname+key are allowed. 36703 - If you're an authdirserver connecting to an address:port, 36704 and it's not the OR you were expecting, forget about that 36705 descriptor. If he *was* the one you were expecting, then forget 36706 about all other descriptors for that address:port. 36707 - Allow servers to publish descriptors from 12 hours in the future. 36708 Corollary: only whine about clock skew from the dirserver if 36709 he's a trusted dirserver (since now even verified servers could 36710 have quite wrong clocks). 36711 - Adjust maximum skew and age for rendezvous descriptors: let skew 36712 be 48 hours rather than 90 minutes. 36713 - Efficiency improvements: 36714 - Keep a big splay tree of (circid,orconn)->circuit mappings to make 36715 it much faster to look up a circuit for each relay cell. 36716 - Remove most calls to assert_all_pending_dns_resolves_ok(), 36717 since they're eating our cpu on exit nodes. 36718 - Stop wasting time doing a case insensitive comparison for every 36719 dns name every time we do any lookup. Canonicalize the names to 36720 lowercase and be done with it. 36721 - Start sending 'truncated' cells back rather than destroy cells, 36722 if the circuit closes in front of you. This means we won't have 36723 to abandon partially built circuits. 36724 - Only warn once per nickname from add_nickname_list_to_smartlist 36725 per failure, so an entrynode or exitnode choice that's down won't 36726 yell so much. 36727 - Put a note in the torrc about abuse potential with the default 36728 exit policy. 36729 - Revise control spec and implementation to allow all log messages to 36730 be sent to controller with their severities intact (suggested by 36731 Matt Edman). Update TorControl to handle new log event types. 36732 - Provide better explanation messages when controller's POSTDESCRIPTOR 36733 fails. 36734 - Stop putting nodename in the Platform string in server descriptors. 36735 It doesn't actually help, and it is confusing/upsetting some people. 36736 36737 o Bugfixes on 0.1.0.2-rc: 36738 - We were printing the host mask wrong in exit policies in server 36739 descriptors. This isn't a critical bug though, since we were still 36740 obeying the exit policy internally. 36741 - Fix Tor when compiled with libevent but without pthreads: move 36742 connection_unregister() from _connection_free() to 36743 connection_free(). 36744 - Fix an assert trigger (already fixed in 0.0.9.x): when we have 36745 the rare mysterious case of accepting a conn on 0.0.0.0:0, then 36746 when we look through the connection array, we'll find any of the 36747 cpu/dnsworkers. This is no good. 36748 36749 o Bugfixes on 0.0.9.8: 36750 - Fix possible bug on threading platforms (e.g. win32) which was 36751 leaking a file descriptor whenever a cpuworker or dnsworker died. 36752 - When using preferred entry or exit nodes, ignore whether the 36753 circuit wants uptime or capacity. They asked for the nodes, they 36754 get the nodes. 36755 - chdir() to your datadirectory at the *end* of the daemonize process, 36756 not the beginning. This was a problem because the first time you 36757 run tor, if your datadir isn't there, and you have runasdaemon set 36758 to 1, it will try to chdir to it before it tries to create it. Oops. 36759 - Handle changed router status correctly when dirserver reloads 36760 fingerprint file. We used to be dropping all unverified descriptors 36761 right then. The bug was hidden because we would immediately 36762 fetch a directory from another dirserver, which would include the 36763 descriptors we just dropped. 36764 - When we're connecting to an OR and he's got a different nickname/key 36765 than we were expecting, only complain loudly if we're an OP or a 36766 dirserver. Complaining loudly to the OR admins just confuses them. 36767 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get 36768 artificially capped at 500kB. 36769 36770 36771Changes in version 0.0.9.8 - 2005-04-07 36772 o Bugfixes on 0.0.9.x: 36773 - We have a bug that I haven't found yet. Sometimes, very rarely, 36774 cpuworkers get stuck in the 'busy' state, even though the cpuworker 36775 thinks of itself as idle. This meant that no new circuits ever got 36776 established. Here's a workaround to kill any cpuworker that's been 36777 busy for more than 100 seconds. 36778 36779 36780Changes in version 0.1.0.2-rc - 2005-04-01 36781 o Bugfixes on 0.1.0.1-rc: 36782 - Fixes on reachability detection: 36783 - Don't check for reachability while hibernating. 36784 - If ORPort is reachable but DirPort isn't, still publish the 36785 descriptor, but zero out DirPort until it's found reachable. 36786 - When building testing circs for ORPort testing, use only 36787 high-bandwidth nodes, so fewer circuits fail. 36788 - Complain about unreachable ORPort separately from unreachable 36789 DirPort, so the user knows what's going on. 36790 - Make sure we only conclude ORPort reachability if we didn't 36791 initiate the conn. Otherwise we could falsely conclude that 36792 we're reachable just because we connected to the guy earlier 36793 and he used that same pipe to extend to us. 36794 - Authdirservers shouldn't do ORPort reachability detection, 36795 since they're in clique mode, so it will be rare to find a 36796 server not already connected to them. 36797 - When building testing circuits, always pick middle hops running 36798 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers" 36799 bug. (This is a kludge; it will go away when 0.0.9.x becomes 36800 obsolete.) 36801 - When we decide we're reachable, actually publish our descriptor 36802 right then. 36803 - Fix bug in redirectstream in the controller. 36804 - Fix the state descriptor strings so logs don't claim edge streams 36805 are in a different state than they actually are. 36806 - Use recent libevent features when possible (this only really affects 36807 win32 and osx right now, because the new libevent with these 36808 features hasn't been released yet). Add code to suppress spurious 36809 libevent log msgs. 36810 - Prevent possible segfault in connection_close_unattached_ap(). 36811 - Fix newlines on torrc in win32. 36812 - Improve error msgs when tor-resolve fails. 36813 36814 o Improvements on 0.0.9.x: 36815 - New experimental script tor/contrib/ExerciseServer.py (needs more 36816 work) that uses the controller interface to build circuits and 36817 fetch pages over them. This will help us bootstrap servers that 36818 have lots of capacity but haven't noticed it yet. 36819 - New experimental script tor/contrib/PathDemo.py (needs more work) 36820 that uses the controller interface to let you choose whole paths 36821 via addresses like 36822 "<hostname>.<path,separated by dots>.<length of path>.path" 36823 - When we've connected to an OR and handshaked but didn't like 36824 the result, we were closing the conn without sending destroy 36825 cells back for pending circuits. Now send those destroys. 36826 36827 36828Changes in version 0.0.9.7 - 2005-04-01 36829 o Bugfixes on 0.0.9.x: 36830 - Fix another race crash bug (thanks to Glenn Fink for reporting). 36831 - Compare identity to identity, not to nickname, when extending to 36832 a router not already in the directory. This was preventing us from 36833 extending to unknown routers. Oops. 36834 - Make sure to create OS X Tor user in <500 range, so we aren't 36835 creating actual system users. 36836 - Note where connection-that-hasn't-sent-end was marked, and fix 36837 a few really loud instances of this harmless bug (it's fixed more 36838 in 0.1.0.x). 36839 36840 36841Changes in version 0.1.0.1-rc - 2005-03-28 36842 o New features: 36843 - Add reachability testing. Your Tor server will automatically try 36844 to see if its ORPort and DirPort are reachable from the outside, 36845 and it won't upload its descriptor until it decides they are. 36846 - Handle unavailable hidden services better. Handle slow or busy 36847 hidden services better. 36848 - Add support for CONNECTing through https proxies, with "HttpsProxy" 36849 config option. 36850 - New exit policy: accept most low-numbered ports, rather than 36851 rejecting most low-numbered ports. 36852 - More Tor controller support (still experimental). See 36853 http://tor.eff.org/doc/control-spec.txt for all the new features, 36854 including signals to emulate unix signals from any platform; 36855 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor; 36856 closestream; closecircuit; etc. 36857 - Make nt services work and start on startup on win32 (based on 36858 patch by Matt Edman). 36859 - Add a new AddressMap config directive to rewrite incoming socks 36860 addresses. This lets you, for example, declare an implicit 36861 required exit node for certain sites. 36862 - Add a new TrackHostExits config directive to trigger addressmaps 36863 for certain incoming socks addresses -- for sites that break when 36864 your exit keeps changing (based on patch by Mike Perry). 36865 - Redo the client-side dns cache so it's just an addressmap too. 36866 - Notice when our IP changes, and reset stats/uptime/reachability. 36867 - When an application is using socks5, give him the whole variety of 36868 potential socks5 responses (connect refused, host unreachable, etc), 36869 rather than just "success" or "failure". 36870 - A more sane version numbering system. See 36871 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details. 36872 - New contributed script "exitlist": a simple python script to 36873 parse directories and find Tor nodes that exit to listed 36874 addresses/ports. 36875 - New contributed script "privoxy-tor-toggle" to toggle whether 36876 Privoxy uses Tor. Seems to be configured for Debian by default. 36877 - Report HTTP reasons to client when getting a response from directory 36878 servers -- so you can actually know what went wrong. 36879 - New config option MaxAdvertisedBandwidth which lets you advertise 36880 a low bandwidthrate (to not attract as many circuits) while still 36881 allowing a higher bandwidthrate in reality. 36882 36883 o Robustness/stability fixes: 36884 - Make Tor use Niels Provos's libevent instead of its current 36885 poll-but-sometimes-select mess. This will let us use faster async 36886 cores (like epoll, kpoll, and /dev/poll), and hopefully work better 36887 on Windows too. 36888 - pthread support now too. This was forced because when we forked, 36889 we ended up wasting a lot of duplicate ram over time. Also switch 36890 to foo_r versions of some library calls to allow reentry and 36891 threadsafeness. 36892 - Better handling for heterogeneous / unreliable nodes: 36893 - Annotate circuits w/ whether they aim to contain high uptime nodes 36894 and/or high capacity nodes. When building circuits, choose 36895 appropriate nodes. 36896 - This means that every single node in an intro rend circuit, 36897 not just the last one, will have a minimum uptime. 36898 - New config option LongLivedPorts to indicate application streams 36899 that will want high uptime circuits. 36900 - Servers reset uptime when a dir fetch entirely fails. This 36901 hopefully reflects stability of the server's network connectivity. 36902 - If somebody starts his tor server in Jan 2004 and then fixes his 36903 clock, don't make his published uptime be a year. 36904 - Reset published uptime when you wake up from hibernation. 36905 - Introduce a notion of 'internal' circs, which are chosen without 36906 regard to the exit policy of the last hop. Intro and rendezvous 36907 circs must be internal circs, to avoid leaking information. Resolve 36908 and connect streams can use internal circs if they want. 36909 - New circuit pooling algorithm: make sure to have enough circs around 36910 to satisfy any predicted ports, and also make sure to have 2 internal 36911 circs around if we've required internal circs lately (and with high 36912 uptime if we've seen that lately too). 36913 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs), 36914 which describes how often we retry making new circuits if current 36915 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes 36916 how long we're willing to make use of an already-dirty circuit. 36917 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND 36918 circ as necessary, if there are any completed ones lying around 36919 when we try to launch one. 36920 - Make hidden services try to establish a rendezvous for 30 seconds, 36921 rather than for n (where n=3) attempts to build a circuit. 36922 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option 36923 "ShutdownWaitLength". 36924 - Try to be more zealous about calling connection_edge_end when 36925 things go bad with edge conns in connection.c. 36926 - Revise tor-spec to add more/better stream end reasons. 36927 - Revise all calls to connection_edge_end to avoid sending "misc", 36928 and to take errno into account where possible. 36929 36930 o Bug fixes: 36931 - Fix a race condition that can trigger an assert, when we have a 36932 pending create cell and an OR connection fails right then. 36933 - Fix several double-mark-for-close bugs, e.g. where we were finding 36934 a conn for a cell even if that conn is already marked for close. 36935 - Make sequence of log messages when starting on win32 with no config 36936 file more reasonable. 36937 - When choosing an exit node for a new non-internal circ, don't take 36938 into account whether it'll be useful for any pending x.onion 36939 addresses -- it won't. 36940 - Turn addr_policy_compare from a tristate to a quadstate; this should 36941 help address our "Ah, you allow 1.2.3.4:80. You are a good choice 36942 for google.com" problem. 36943 - Make "platform" string in descriptor more accurate for Win32 servers, 36944 so it's not just "unknown platform". 36945 - Fix an edge case in parsing config options (thanks weasel). 36946 If they say "--" on the commandline, it's not an option. 36947 - Reject odd-looking addresses at the client (e.g. addresses that 36948 contain a colon), rather than having the server drop them because 36949 they're malformed. 36950 - tor-resolve requests were ignoring .exit if there was a working circuit 36951 they could use instead. 36952 - REUSEADDR on normal platforms means you can rebind to the port 36953 right after somebody else has let it go. But REUSEADDR on win32 36954 means to let you bind to the port _even when somebody else 36955 already has it bound_! So, don't do that on Win32. 36956 - Change version parsing logic: a version is "obsolete" if it is not 36957 recommended and (1) there is a newer recommended version in the 36958 same series, or (2) there are no recommended versions in the same 36959 series, but there are some recommended versions in a newer series. 36960 A version is "new" if it is newer than any recommended version in 36961 the same series. 36962 - Stop most cases of hanging up on a socks connection without sending 36963 the socks reject. 36964 36965 o Helpful fixes: 36966 - Require BandwidthRate to be at least 20kB/s for servers. 36967 - When a dirserver causes you to give a warn, mention which dirserver 36968 it was. 36969 - New config option DirAllowPrivateAddresses for authdirservers. 36970 Now by default they refuse router descriptors that have non-IP or 36971 private-IP addresses. 36972 - Stop publishing socksport in the directory, since it's not 36973 actually meant to be public. For compatibility, publish a 0 there 36974 for now. 36975 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be 36976 smart" value, that is low for servers and high for clients. 36977 - If our clock jumps forward by 100 seconds or more, assume something 36978 has gone wrong with our network and abandon all not-yet-used circs. 36979 - Warn when exit policy implicitly allows local addresses. 36980 - If we get an incredibly skewed timestamp from a dirserver mirror 36981 that isn't a verified OR, don't warn -- it's probably him that's 36982 wrong. 36983 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write 36984 cookies to disk and doesn't log each web request to disk. (Thanks 36985 to Brett Carrington for pointing this out.) 36986 - When a client asks us for a dir mirror and we don't have one, 36987 launch an attempt to get a fresh one. 36988 - If we're hibernating and we get a SIGINT, exit immediately. 36989 - Add --with-dmalloc ./configure option, to track memory leaks. 36990 - And try to free all memory on closing, so we can detect what 36991 we're leaking. 36992 - Cache local dns resolves correctly even when they're .exit 36993 addresses. 36994 - Give a better warning when some other server advertises an 36995 ORPort that is actually an apache running ssl. 36996 - Add "opt hibernating 1" to server descriptor to make it clearer 36997 whether the server is hibernating. 36998 36999 37000Changes in version 0.0.9.6 - 2005-03-24 37001 o Bugfixes on 0.0.9.x (crashes and asserts): 37002 - Add new end stream reasons to maintenance branch. Fix bug where 37003 reason (8) could trigger an assert. Prevent bug from recurring. 37004 - Apparently win32 stat wants paths to not end with a slash. 37005 - Fix assert triggers in assert_cpath_layer_ok(), where we were 37006 blowing away the circuit that conn->cpath_layer points to, then 37007 checking to see if the circ is well-formed. Backport check to make 37008 sure we dont use the cpath on a closed connection. 37009 - Prevent circuit_resume_edge_reading_helper() from trying to package 37010 inbufs for marked-for-close streams. 37011 - Don't crash on hup if your options->address has become unresolvable. 37012 - Some systems (like OS X) sometimes accept() a connection and tell 37013 you the remote host is 0.0.0.0:0. If this happens, due to some 37014 other mis-features, we get confused; so refuse the conn for now. 37015 37016 o Bugfixes on 0.0.9.x (other): 37017 - Fix harmless but scary "Unrecognized content encoding" warn message. 37018 - Add new stream error reason: TORPROTOCOL reason means "you are not 37019 speaking a version of Tor I understand; say bye-bye to your stream." 37020 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds 37021 into the future, now that we are more tolerant of skew. This 37022 resolves a bug where a Tor server would refuse to cache a directory 37023 because all the directories it gets are too far in the future; 37024 yet the Tor server never logs any complaints about clock skew. 37025 - Mac packaging magic: make man pages useable, and do not overwrite 37026 existing torrc files. 37027 - Make OS X log happily to /var/log/tor/tor.log 37028 37029 37030Changes in version 0.0.9.5 - 2005-02-22 37031 o Bugfixes on 0.0.9.x: 37032 - Fix an assert race at exit nodes when resolve requests fail. 37033 - Stop picking unverified dir mirrors--it only leads to misery. 37034 - Patch from Matt Edman to make NT services work better. Service 37035 support is still not compiled into the executable by default. 37036 - Patch from Dmitri Bely so the Tor service runs better under 37037 the win32 SYSTEM account. 37038 - Make tor-resolve actually work (?) on Win32. 37039 - Fix a sign bug when getrlimit claims to have 4+ billion 37040 file descriptors available. 37041 - Stop refusing to start when bandwidthburst == bandwidthrate. 37042 - When create cells have been on the onion queue more than five 37043 seconds, just send back a destroy and take them off the list. 37044 37045 37046Changes in version 0.0.9.4 - 2005-02-03 37047 o Bugfixes on 0.0.9: 37048 - Fix an assert bug that took down most of our servers: when 37049 a server claims to have 1 GB of bandwidthburst, don't 37050 freak out. 37051 - Don't crash as badly if we have spawned the max allowed number 37052 of dnsworkers, or we're out of file descriptors. 37053 - Block more file-sharing ports in the default exit policy. 37054 - MaxConn is now automatically set to the hard limit of max 37055 file descriptors we're allowed (ulimit -n), minus a few for 37056 logs, etc. 37057 - Give a clearer message when servers need to raise their 37058 ulimit -n when they start running out of file descriptors. 37059 - SGI Compatibility patches from Jan Schaumann. 37060 - Tolerate a corrupt cached directory better. 37061 - When a dirserver hasn't approved your server, list which one. 37062 - Go into soft hibernation after 95% of the bandwidth is used, 37063 not 99%. This is especially important for daily hibernators who 37064 have a small accounting max. Hopefully it will result in fewer 37065 cut connections when the hard hibernation starts. 37066 - Load-balance better when using servers that claim more than 37067 800kB/s of capacity. 37068 - Make NT services work (experimental, only used if compiled in). 37069 37070 37071Changes in version 0.0.9.3 - 2005-01-21 37072 o Bugfixes on 0.0.9: 37073 - Backport the cpu use fixes from main branch, so busy servers won't 37074 need as much processor time. 37075 - Work better when we go offline and then come back, or when we 37076 run Tor at boot before the network is up. We do this by 37077 optimistically trying to fetch a new directory whenever an 37078 application request comes in and we think we're offline -- the 37079 human is hopefully a good measure of when the network is back. 37080 - Backport some minimal hidserv bugfixes: keep rend circuits open as 37081 long as you keep using them; actually publish hidserv descriptors 37082 shortly after they change, rather than waiting 20-40 minutes. 37083 - Enable Mac startup script by default. 37084 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas. 37085 - When you update AllowUnverifiedNodes or FirewallPorts via the 37086 controller's setconf feature, we were always appending, never 37087 resetting. 37088 - When you update HiddenServiceDir via setconf, it was screwing up 37089 the order of reading the lines, making it fail. 37090 - Do not rewrite a cached directory back to the cache; otherwise we 37091 will think it is recent and not fetch a newer one on startup. 37092 - Workaround for webservers that lie about Content-Encoding: Tor 37093 now tries to autodetect compressed directories and compression 37094 itself. This lets us Proxypass dir fetches through apache. 37095 37096 37097Changes in version 0.0.9.2 - 2005-01-04 37098 o Bugfixes on 0.0.9 (crashes and asserts): 37099 - Fix an assert on startup when the disk is full and you're logging 37100 to a file. 37101 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a 37102 style address, then we'd crash. 37103 - Fix an assert trigger when the running-routers string we get from 37104 a dirserver is broken. 37105 - Make worker threads start and run on win32. Now win32 servers 37106 may work better. 37107 - Bandaid (not actually fix, but now it doesn't crash) an assert 37108 where the dns worker dies mysteriously and the main Tor process 37109 doesn't remember anything about the address it was resolving. 37110 37111 o Bugfixes on 0.0.9 (Win32): 37112 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's 37113 name out of the warning/assert messages. 37114 - Fix a superficial "unhandled error on read" bug on win32. 37115 - The win32 installer no longer requires a click-through for our 37116 license, since our Free Software license grants rights but does not 37117 take any away. 37118 - Win32: When connecting to a dirserver fails, try another one 37119 immediately. (This was already working for non-win32 Tors.) 37120 - Stop trying to parse $HOME on win32 when hunting for default 37121 DataDirectory. 37122 - Make tor-resolve.c work on win32 by calling network_init(). 37123 37124 o Bugfixes on 0.0.9 (other): 37125 - Make 0.0.9.x build on Solaris again. 37126 - Due to a fencepost error, we were blowing away the \n when reporting 37127 confvalue items in the controller. So asking for multiple config 37128 values at once couldn't work. 37129 - When listing circuits that are pending on an opening OR connection, 37130 if we're an OR we were listing circuits that *end* at us as 37131 being pending on every listener, dns/cpu worker, etc. Stop that. 37132 - Dirservers were failing to create 'running-routers' or 'directory' 37133 strings if we had more than some threshold of routers. Fix them so 37134 they can handle any number of routers. 37135 - Fix a superficial "Duplicate mark for close" bug. 37136 - Stop checking for clock skew for OR connections, even for servers. 37137 - Fix a fencepost error that was chopping off the last letter of any 37138 nickname that is the maximum allowed nickname length. 37139 - Update URLs in log messages so they point to the new website. 37140 - Fix a potential problem in mangling server private keys while 37141 writing to disk (not triggered yet, as far as we know). 37142 - Include the licenses for other free software we include in Tor, 37143 now that we're shipping binary distributions more regularly. 37144 37145 37146Changes in version 0.0.9.1 - 2004-12-15 37147 o Bugfixes on 0.0.9: 37148 - Make hibernation actually work. 37149 - Make HashedControlPassword config option work. 37150 - When we're reporting event circuit status to a controller, 37151 don't use the stream status code. 37152 37153 37154Changes in version 0.0.9 - 2004-12-12 37155 o Cleanups: 37156 - Clean up manpage and torrc.sample file. 37157 - Clean up severities and text of log warnings. 37158 o Mistakes: 37159 - Make servers trigger an assert when they enter hibernation. 37160 37161 37162Changes in version 0.0.9rc7 - 2004-12-08 37163 o Bugfixes on 0.0.9rc: 37164 - Fix a stack-trashing crash when an exit node begins hibernating. 37165 - Avoid looking at unallocated memory while considering which 37166 ports we need to build circuits to cover. 37167 - Stop a sigpipe: when an 'end' cell races with eof from the app, 37168 we shouldn't hold-open-until-flush if the eof arrived first. 37169 - Fix a bug with init_cookie_authentication() in the controller. 37170 - When recommending new-format log lines, if the upper bound is 37171 LOG_ERR, leave it implicit. 37172 37173 o Bugfixes on 0.0.8.1: 37174 - Fix a whole slew of memory leaks. 37175 - Fix isspace() and friends so they still make Solaris happy 37176 but also so they don't trigger asserts on win32. 37177 - Fix parse_iso_time on platforms without strptime (eg win32). 37178 - win32: tolerate extra "readable" events better. 37179 - win32: when being multithreaded, leave parent fdarray open. 37180 - Make unit tests work on win32. 37181 37182 37183Changes in version 0.0.9rc6 - 2004-12-06 37184 o Bugfixes on 0.0.9pre: 37185 - Clean up some more integer underflow opportunities (not exploitable 37186 we think). 37187 - While hibernating, hup should not regrow our listeners. 37188 - Send an end to the streams we close when we hibernate, rather 37189 than just chopping them off. 37190 - React to eof immediately on non-open edge connections. 37191 37192 o Bugfixes on 0.0.8.1: 37193 - Calculate timeout for waiting for a connected cell from the time 37194 we sent the begin cell, not from the time the stream started. If 37195 it took a long time to establish the circuit, we would time out 37196 right after sending the begin cell. 37197 - Fix router_compare_addr_to_addr_policy: it was not treating a port 37198 of * as always matching, so we were picking reject *:* nodes as 37199 exit nodes too. Oops. 37200 37201 o Features: 37202 - New circuit building strategy: keep a list of ports that we've 37203 used in the past 6 hours, and always try to have 2 circuits open 37204 or on the way that will handle each such port. Seed us with port 37205 80 so web users won't complain that Tor is "slow to start up". 37206 - Make kill -USR1 dump more useful stats about circuits. 37207 - When warning about retrying or giving up, print the address, so 37208 the user knows which one it's talking about. 37209 - If you haven't used a clean circuit in an hour, throw it away, 37210 just to be on the safe side. (This means after 6 hours a totally 37211 unused Tor client will have no circuits open.) 37212 37213 37214Changes in version 0.0.9rc5 - 2004-12-01 37215 o Bugfixes on 0.0.8.1: 37216 - Disallow NDEBUG. We don't ever want anybody to turn off debug. 37217 - Let resolve conns retry/expire also, rather than sticking around 37218 forever. 37219 - If we are using select, make sure we stay within FD_SETSIZE. 37220 37221 o Bugfixes on 0.0.9pre: 37222 - Fix integer underflow in tor_vsnprintf() that may be exploitable, 37223 but doesn't seem to be currently; thanks to Ilja van Sprundel for 37224 finding it. 37225 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod 37226 instead. Impose minima and maxima for all *Period options; impose 37227 even tighter maxima for fetching if we are a caching dirserver. 37228 Clip rather than rejecting. 37229 - Fetch cached running-routers from servers that serve it (that is, 37230 authdirservers and servers running 0.0.9rc5-cvs or later.) 37231 37232 o Features: 37233 - Accept *:706 (silc) in default exit policy. 37234 - Implement new versioning format for post 0.1. 37235 - Support "foo.nickname.exit" addresses, to let Alice request the 37236 address "foo" as viewed by exit node "nickname". Based on a patch 37237 by Geoff Goodell. 37238 - Make tor --version --version dump the cvs Id of every file. 37239 37240 37241Changes in version 0.0.9rc4 - 2004-11-28 37242 o Bugfixes on 0.0.8.1: 37243 - Make windows sockets actually non-blocking (oops), and handle 37244 win32 socket errors better. 37245 37246 o Bugfixes on 0.0.9rc1: 37247 - Actually catch the -USR2 signal. 37248 37249 37250Changes in version 0.0.9rc3 - 2004-11-25 37251 o Bugfixes on 0.0.8.1: 37252 - Flush the log file descriptor after we print "Tor opening log file", 37253 so we don't see those messages days later. 37254 37255 o Bugfixes on 0.0.9rc1: 37256 - Make tor-resolve work again. 37257 - Avoid infinite loop in tor-resolve if tor hangs up on it. 37258 - Fix an assert trigger for clients/servers handling resolves. 37259 37260 37261Changes in version 0.0.9rc2 - 2004-11-24 37262 o Bugfixes on 0.0.9rc1: 37263 - I broke socks5 support while fixing the eof bug. 37264 - Allow unitless bandwidths and intervals; they default to bytes 37265 and seconds. 37266 - New servers don't start out hibernating; they are active until 37267 they run out of bytes, so they have a better estimate of how 37268 long it takes, and so their operators can know they're working. 37269 37270 37271Changes in version 0.0.9rc1 - 2004-11-23 37272 o Bugfixes on 0.0.8.1: 37273 - Finally fix a bug that's been plaguing us for a year: 37274 With high load, circuit package window was reaching 0. Whenever 37275 we got a circuit-level sendme, we were reading a lot on each 37276 socket, but only writing out a bit. So we would eventually reach 37277 eof. This would be noticed and acted on even when there were still 37278 bytes sitting in the inbuf. 37279 - When poll() is interrupted, we shouldn't believe the revents values. 37280 37281 o Bugfixes on 0.0.9pre6: 37282 - Fix hibernate bug that caused pre6 to be broken. 37283 - Don't keep rephist info for routers that haven't had activity for 37284 24 hours. (This matters now that clients have keys, since we track 37285 them too.) 37286 - Never call close_temp_logs while validating log options. 37287 - Fix backslash-escaping on tor.sh.in and torctl.in. 37288 37289 o Features: 37290 - Implement weekly/monthly/daily accounting: now you specify your 37291 hibernation properties by 37292 AccountingMax N bytes|KB|MB|GB|TB 37293 AccountingStart day|week|month [day] HH:MM 37294 Defaults to "month 1 0:00". 37295 - Let bandwidth and interval config options be specified as 5 bytes, 37296 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks. 37297 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to 37298 get back to normal.) 37299 - If your requested entry or exit node has advertised bandwidth 0, 37300 pick it anyway. 37301 - Be more greedy about filling up relay cells -- we try reading again 37302 once we've processed the stuff we read, in case enough has arrived 37303 to fill the last cell completely. 37304 - Apply NT service patch from Osamu Fujino. Still needs more work. 37305 37306 37307Changes in version 0.0.9pre6 - 2004-11-15 37308 o Bugfixes on 0.0.8.1: 37309 - Fix assert failure on malformed socks4a requests. 37310 - Use identity comparison, not nickname comparison, to choose which 37311 half of circuit-ID-space each side gets to use. This is needed 37312 because sometimes we think of a router as a nickname, and sometimes 37313 as a hex ID, and we can't predict what the other side will do. 37314 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our 37315 write() call will fail and we handle it there. 37316 - Add a FAST_SMARTLIST define to optionally inline smartlist_get 37317 and smartlist_len, which are two major profiling offenders. 37318 37319 o Bugfixes on 0.0.9pre5: 37320 - Fix a bug in read_all that was corrupting config files on windows. 37321 - When we're raising the max number of open file descriptors to 37322 'unlimited', don't log that we just raised it to '-1'. 37323 - Include event code with events, as required by control-spec.txt. 37324 - Don't give a fingerprint when clients do --list-fingerprint: 37325 it's misleading, because it will never be the same again. 37326 - Stop using strlcpy in tor_strndup, since it was slowing us 37327 down a lot. 37328 - Remove warn on startup about missing cached-directory file. 37329 - Make kill -USR1 work again. 37330 - Hibernate if we start tor during the "wait for wakeup-time" phase 37331 of an accounting interval. Log our hibernation plans better. 37332 - Authoritative dirservers now also cache their directory, so they 37333 have it on start-up. 37334 37335 o Features: 37336 - Fetch running-routers; cache running-routers; compress 37337 running-routers; serve compressed running-routers.z 37338 - Add NSI installer script contributed by J Doe. 37339 - Commit VC6 and VC7 workspace/project files. 37340 - Commit a tor.spec for making RPM files, with help from jbash. 37341 - Add contrib/torctl.in contributed by Glenn Fink. 37342 - Implement the control-spec's SAVECONF command, to write your 37343 configuration to torrc. 37344 - Get cookie authentication for the controller closer to working. 37345 - Include control-spec.txt in the tarball. 37346 - When set_conf changes our server descriptor, upload a new copy. 37347 But don't upload it too often if there are frequent changes. 37348 - Document authentication config in man page, and document signals 37349 we catch. 37350 - Clean up confusing parts of man page and torrc.sample. 37351 - Make expand_filename handle ~ and ~username. 37352 - Use autoconf to enable largefile support where necessary. Use 37353 ftello where available, since ftell can fail at 2GB. 37354 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can 37355 log more informatively. 37356 - Give a slightly more useful output for "tor -h". 37357 - Refuse application socks connections to port 0. 37358 - Check clock skew for verified servers, but allow unverified 37359 servers and clients to have any clock skew. 37360 - Break DirFetchPostPeriod into: 37361 - DirFetchPeriod for fetching full directory, 37362 - StatusFetchPeriod for fetching running-routers, 37363 - DirPostPeriod for posting server descriptor, 37364 - RendPostPeriod for posting hidden service descriptors. 37365 - Make sure the hidden service descriptors are at a random offset 37366 from each other, to hinder linkability. 37367 37368 37369Changes in version 0.0.9pre5 - 2004-11-09 37370 o Bugfixes on 0.0.9pre4: 37371 - Fix a seg fault in unit tests (doesn't affect main program). 37372 - Fix an assert bug where a hidden service provider would fail if 37373 the first hop of his rendezvous circuit was down. 37374 - Hidden service operators now correctly handle version 1 style 37375 INTRODUCE1 cells (nobody generates them still, so not a critical 37376 bug). 37377 - If do_hup fails, actually notice. 37378 - Handle more errnos from accept() without closing the listener. 37379 Some OpenBSD machines were closing their listeners because 37380 they ran out of file descriptors. 37381 - Send resolve cells to exit routers that are running a new 37382 enough version of the resolve code to work right. 37383 - Better handling of winsock includes on non-MSV win32 compilers. 37384 - Some people had wrapped their tor client/server in a script 37385 that would restart it whenever it died. This did not play well 37386 with our "shut down if your version is obsolete" code. Now people 37387 don't fetch a new directory if their local cached version is 37388 recent enough. 37389 - Make our autogen.sh work on ksh as well as bash. 37390 37391 o Major Features: 37392 - Hibernation: New config option "AccountingMaxKB" lets you 37393 set how many KBytes per month you want to allow your server to 37394 consume. Rather than spreading those bytes out evenly over the 37395 month, we instead hibernate for some of the month and pop up 37396 at a deterministic time, work until the bytes are consumed, then 37397 hibernate again. Config option "MonthlyAccountingStart" lets you 37398 specify which day of the month your billing cycle starts on. 37399 - Control interface: a separate program can now talk to your 37400 client/server over a socket, and get/set config options, receive 37401 notifications of circuits and streams starting/finishing/dying, 37402 bandwidth used, etc. The next step is to get some GUIs working. 37403 Let us know if you want to help out. See doc/control-spec.txt . 37404 - Ship a contrib/tor-control.py as an example script to interact 37405 with the control port. 37406 - "tor --hash-password zzyxz" will output a salted password for 37407 use in authenticating to the control interface. 37408 - New log format in config: 37409 "Log minsev[-maxsev] stdout|stderr|syslog" or 37410 "Log minsev[-maxsev] file /var/foo" 37411 37412 o Minor Features: 37413 - DirPolicy config option, to let people reject incoming addresses 37414 from their dirserver. 37415 - "tor --list-fingerprint" will list your identity key fingerprint 37416 and then exit. 37417 - Add "pass" target for RedirectExit, to make it easier to break 37418 out of a sequence of RedirectExit rules. 37419 - Clients now generate a TLS cert too, in preparation for having 37420 them act more like real nodes. 37421 - Ship src/win32/ in the tarball, so people can use it to build. 37422 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation 37423 is broken. 37424 - New "router-status" line in directory, to better bind each verified 37425 nickname to its identity key. 37426 - Deprecate unofficial config option abbreviations, and abbreviations 37427 not on the command line. 37428 - Add a pure-C tor-resolve implementation. 37429 - Use getrlimit and friends to ensure we can reach MaxConn (currently 37430 1024) file descriptors. 37431 37432 o Code security improvements, inspired by Ilja: 37433 - Replace sprintf with snprintf. (I think they were all safe, but 37434 hey.) 37435 - Replace strcpy/strncpy with strlcpy in more places. 37436 - Avoid strcat; use snprintf or strlcat instead. 37437 - snprintf wrapper with consistent (though not C99) overflow behavior. 37438 37439 37440Changes in version 0.0.9pre4 - 2004-10-17 37441 o Bugfixes on 0.0.9pre3: 37442 - If the server doesn't specify an exit policy, use the real default 37443 exit policy, not reject *:*. 37444 - Ignore fascistfirewall when uploading/downloading hidden service 37445 descriptors, since we go through Tor for those; and when using 37446 an HttpProxy, since we assume it can reach them all. 37447 - When looking for an authoritative dirserver, use only the ones 37448 configured at boot. Don't bother looking in the directory. 37449 - The rest of the fix for get_default_conf_file() on older win32. 37450 - Make 'Routerfile' config option obsolete. 37451 37452 o Features: 37453 - New 'MyFamily nick1,...' config option for a server to 37454 specify other servers that shouldn't be used in the same circuit 37455 with it. Only believed if nick1 also specifies us. 37456 - New 'NodeFamily nick1,nick2,...' config option for a client to 37457 specify nodes that it doesn't want to use in the same circuit. 37458 - New 'Redirectexit pattern address:port' config option for a 37459 server to redirect exit connections, e.g. to a local squid. 37460 37461 37462Changes in version 0.0.9pre3 - 2004-10-13 37463 o Bugfixes on 0.0.8.1: 37464 - Better torrc example lines for dirbindaddress and orbindaddress. 37465 - Improved bounds checking on parsed ints (e.g. config options and 37466 the ones we find in directories.) 37467 - Better handling of size_t vs int, so we're more robust on 64 37468 bit platforms. 37469 - Fix the rest of the bug where a newly started OR would appear 37470 as unverified even after we've added his fingerprint and hupped 37471 the dirserver. 37472 - Fix a bug from 0.0.7: when read() failed on a stream, we would 37473 close it without sending back an end. So 'connection refused' 37474 would simply be ignored and the user would get no response. 37475 37476 o Bugfixes on 0.0.9pre2: 37477 - Serving the cached-on-disk directory to people is bad. We now 37478 provide no directory until we've fetched a fresh one. 37479 - Workaround for bug on windows where cached-directories get crlf 37480 corruption. 37481 - Make get_default_conf_file() work on older windows too. 37482 - If we write a *:* exit policy line in the descriptor, don't write 37483 any more exit policy lines. 37484 37485 o Features: 37486 - Use only 0.0.9pre1 and later servers for resolve cells. 37487 - Make the dirservers file obsolete. 37488 - Include a dir-signing-key token in directories to tell the 37489 parsing entity which key is being used to sign. 37490 - Remove the built-in bulky default dirservers string. 37491 - New config option "Dirserver %s:%d [fingerprint]", which can be 37492 repeated as many times as needed. If no dirservers specified, 37493 default to moria1,moria2,tor26. 37494 - Make moria2 advertise a dirport of 80, so people behind firewalls 37495 will be able to get a directory. 37496 - Http proxy support 37497 - Dirservers translate requests for http://%s:%d/x to /x 37498 - You can specify "HttpProxy %s[:%d]" and all dir fetches will 37499 be routed through this host. 37500 - Clients ask for /tor/x rather than /x for new enough dirservers. 37501 This way we can one day coexist peacefully with apache. 37502 - Clients specify a "Host: %s%d" http header, to be compatible 37503 with more proxies, and so running squid on an exit node can work. 37504 37505 37506Changes in version 0.0.8.1 - 2004-10-13 37507 o Bugfixes: 37508 - Fix a seg fault that can be triggered remotely for Tor 37509 clients/servers with an open dirport. 37510 - Fix a rare assert trigger, where routerinfos for entries in 37511 our cpath would expire while we're building the path. 37512 - Fix a bug in OutboundBindAddress so it (hopefully) works. 37513 - Fix a rare seg fault for people running hidden services on 37514 intermittent connections. 37515 - Fix a bug in parsing opt keywords with objects. 37516 - Fix a stale pointer assert bug when a stream detaches and 37517 reattaches. 37518 - Fix a string format vulnerability (probably not exploitable) 37519 in reporting stats locally. 37520 - Fix an assert trigger: sometimes launching circuits can fail 37521 immediately, e.g. because too many circuits have failed recently. 37522 - Fix a compile warning on 64 bit platforms. 37523 37524 37525Changes in version 0.0.9pre2 - 2004-10-03 37526 o Bugfixes: 37527 - Make fetching a cached directory work for 64-bit platforms too. 37528 - Make zlib.h a required header, not an optional header. 37529 37530 37531Changes in version 0.0.9pre1 - 2004-10-01 37532 o Bugfixes: 37533 - Stop using separate defaults for no-config-file and 37534 empty-config-file. Now you have to explicitly turn off SocksPort, 37535 if you don't want it open. 37536 - Fix a bug in OutboundBindAddress so it (hopefully) works. 37537 - Improve man page to mention more of the 0.0.8 features. 37538 - Fix a rare seg fault for people running hidden services on 37539 intermittent connections. 37540 - Change our file IO stuff (especially wrt OpenSSL) so win32 is 37541 happier. 37542 - Fix more dns related bugs: send back resolve_failed and end cells 37543 more reliably when the resolve fails, rather than closing the 37544 circuit and then trying to send the cell. Also attach dummy resolve 37545 connections to a circuit *before* calling dns_resolve(), to fix 37546 a bug where cached answers would never be sent in RESOLVED cells. 37547 - When we run out of disk space, or other log writing error, don't 37548 crash. Just stop logging to that log and continue. 37549 - We were starting to daemonize before we opened our logs, so if 37550 there were any problems opening logs, we would complain to stderr, 37551 which wouldn't work, and then mysteriously exit. 37552 - Fix a rare bug where sometimes a verified OR would connect to us 37553 before he'd uploaded his descriptor, which would cause us to 37554 assign conn->nickname as though he's unverified. Now we look through 37555 the fingerprint list to see if he's there. 37556 - Fix a rare assert trigger, where routerinfos for entries in 37557 our cpath would expire while we're building the path. 37558 37559 o Features: 37560 - Clients can ask dirservers for /dir.z to get a compressed version 37561 of the directory. Only works for servers running 0.0.9, of course. 37562 - Make clients cache directories and use them to seed their router 37563 lists at startup. This means clients have a datadir again. 37564 - Configuration infrastructure support for warning on obsolete 37565 options. 37566 - Respond to content-encoding headers by trying to uncompress as 37567 appropriate. 37568 - Reply with a deflated directory when a client asks for "dir.z". 37569 We could use allow-encodings instead, but allow-encodings isn't 37570 specified in HTTP 1.0. 37571 - Raise the max dns workers from 50 to 100. 37572 - Discourage people from setting their dirfetchpostperiod more often 37573 than once per minute. 37574 - Protect dirservers from overzealous descriptor uploading -- wait 37575 10 seconds after directory gets dirty, before regenerating. 37576 37577 37578Changes in version 0.0.8 - 2004-08-25 37579 o Port it to SunOS 5.9 / Athena 37580 37581 37582Changes in version 0.0.8rc2 - 2004-08-20 37583 o Make it compile on cygwin again. 37584 o When picking unverified routers, skip those with low uptime and/or 37585 low bandwidth, depending on what properties you care about. 37586 37587 37588Changes in version 0.0.8rc1 - 2004-08-18 37589 o Changes from 0.0.7.3: 37590 - Bugfixes: 37591 - Fix assert triggers: if the other side returns an address 0.0.0.0, 37592 don't put it into the client dns cache. 37593 - If a begin failed due to exit policy, but we believe the IP address 37594 should have been allowed, switch that router to exitpolicy reject *:* 37595 until we get our next directory. 37596 - Features: 37597 - Clients choose nodes proportional to advertised bandwidth. 37598 - Avoid using nodes with low uptime as introduction points. 37599 - Handle servers with dynamic IP addresses: don't replace 37600 options->Address with the resolved one at startup, and 37601 detect our address right before we make a routerinfo each time. 37602 - 'FascistFirewall' option to pick dirservers and ORs on specific 37603 ports; plus 'FirewallPorts' config option to tell FascistFirewall 37604 which ports are open. (Defaults to 80,443) 37605 - Be more aggressive about trying to make circuits when the network 37606 has changed (e.g. when you unsuspend your laptop). 37607 - Check for time skew on http headers; report date in response to 37608 "GET /". 37609 - If the entrynode config line has only one node, don't pick it as 37610 an exitnode. 37611 - Add strict{entry|exit}nodes config options. If set to 1, then 37612 we refuse to build circuits that don't include the specified entry 37613 or exit nodes. 37614 - OutboundBindAddress config option, to bind to a specific 37615 IP address for outgoing connect()s. 37616 - End truncated log entries (e.g. directories) with "[truncated]". 37617 37618 o Patches to 0.0.8preX: 37619 - Bugfixes: 37620 - Patches to compile and run on win32 again (maybe)? 37621 - Fix crash when looking for ~/.torrc with no $HOME set. 37622 - Fix a race bug in the unit tests. 37623 - Handle verified/unverified name collisions better when new 37624 routerinfo's arrive in a directory. 37625 - Sometimes routers were getting entered into the stats before 37626 we'd assigned their identity_digest. Oops. 37627 - Only pick and establish intro points after we've gotten a 37628 directory. 37629 - Features: 37630 - AllowUnverifiedNodes config option to let circuits choose no-name 37631 routers in entry,middle,exit,introduction,rendezvous positions. 37632 Allow middle and rendezvous positions by default. 37633 - Add a man page for tor-resolve. 37634 37635 37636Changes in version 0.0.7.3 - 2004-08-12 37637 o Stop dnsworkers from triggering an assert failure when you 37638 ask them to resolve the host "". 37639 37640 37641Changes in version 0.0.8pre3 - 2004-08-09 37642 o Changes from 0.0.7.2: 37643 - Allow multiple ORs with same nickname in routerlist -- now when 37644 people give us one identity key for a nickname, then later 37645 another, we don't constantly complain until the first expires. 37646 - Remember used bandwidth (both in and out), and publish 15-minute 37647 snapshots for the past day into our descriptor. 37648 - You can now fetch $DIRURL/running-routers to get just the 37649 running-routers line, not the whole descriptor list. (But 37650 clients don't use this yet.) 37651 - When people mistakenly use Tor as an http proxy, point them 37652 at the tor-doc.html rather than the INSTALL. 37653 - Remove our mostly unused -- and broken -- hex_encode() 37654 function. Use base16_encode() instead. (Thanks to Timo Lindfors 37655 for pointing out this bug.) 37656 - Rotate onion keys every 12 hours, not every 2 hours, so we have 37657 fewer problems with people using the wrong key. 37658 - Change the default exit policy to reject the default edonkey, 37659 kazaa, gnutella ports. 37660 - Add replace_file() to util.[ch] to handle win32's rename(). 37661 37662 o Changes from 0.0.8preX: 37663 - Fix two bugs in saving onion keys to disk when rotating, so 37664 hopefully we'll get fewer people using old onion keys. 37665 - Fix an assert error that was making SocksPolicy not work. 37666 - Be willing to expire routers that have an open dirport -- it's 37667 just the authoritative dirservers we want to not forget. 37668 - Reject tor-resolve requests for .onion addresses early, so we 37669 don't build a whole rendezvous circuit and then fail. 37670 - When you're warning a server that he's unverified, don't cry 37671 wolf unpredictably. 37672 - Fix a race condition: don't try to extend onto a connection 37673 that's still handshaking. 37674 - For servers in clique mode, require the conn to be open before 37675 you'll choose it for your path. 37676 - Fix some cosmetic bugs about duplicate mark-for-close, lack of 37677 end relay cell, etc. 37678 - Measure bandwidth capacity over the last 24 hours, not just 12 37679 - Bugfix: authoritative dirservers were making and signing a new 37680 directory for each client, rather than reusing the cached one. 37681 37682 37683Changes in version 0.0.8pre2 - 2004-08-04 37684 o Changes from 0.0.7.2: 37685 - Security fixes: 37686 - Check directory signature _before_ you decide whether you're 37687 you're running an obsolete version and should exit. 37688 - Check directory signature _before_ you parse the running-routers 37689 list to decide who's running or verified. 37690 - Bugfixes and features: 37691 - Check return value of fclose while writing to disk, so we don't 37692 end up with broken files when servers run out of disk space. 37693 - Log a warning if the user uses an unsafe socks variant, so people 37694 are more likely to learn about privoxy or socat. 37695 - Dirservers now include RFC1123-style dates in the HTTP headers, 37696 which one day we will use to better detect clock skew. 37697 37698 o Changes from 0.0.8pre1: 37699 - Make it compile without warnings again on win32. 37700 - Log a warning if you're running an unverified server, to let you 37701 know you might want to get it verified. 37702 - Only pick a default nickname if you plan to be a server. 37703 37704 37705Changes in version 0.0.8pre1 - 2004-07-23 37706 o Bugfixes: 37707 - Made our unit tests compile again on OpenBSD 3.5, and tor 37708 itself compile again on OpenBSD on a sparc64. 37709 - We were neglecting milliseconds when logging on win32, so 37710 everything appeared to happen at the beginning of each second. 37711 37712 o Protocol changes: 37713 - 'Extend' relay cell payloads now include the digest of the 37714 intended next hop's identity key. Now we can verify that we're 37715 extending to the right router, and also extend to routers we 37716 hadn't heard of before. 37717 37718 o Features: 37719 - Tor nodes can now act as relays (with an advertised ORPort) 37720 without being manually verified by the dirserver operators. 37721 - Uploaded descriptors of unverified routers are now accepted 37722 by the dirservers, and included in the directory. 37723 - Verified routers are listed by nickname in the running-routers 37724 list; unverified routers are listed as "$<fingerprint>". 37725 - We now use hash-of-identity-key in most places rather than 37726 nickname or addr:port, for improved security/flexibility. 37727 - To avoid Sybil attacks, paths still use only verified servers. 37728 But now we have a chance to play around with hybrid approaches. 37729 - Nodes track bandwidth usage to estimate capacity (not used yet). 37730 - ClientOnly option for nodes that never want to become servers. 37731 - Directory caching. 37732 - "AuthoritativeDir 1" option for the official dirservers. 37733 - Now other nodes (clients and servers) will cache the latest 37734 directory they've pulled down. 37735 - They can enable their DirPort to serve it to others. 37736 - Clients will pull down a directory from any node with an open 37737 DirPort, and check the signature/timestamp correctly. 37738 - Authoritative dirservers now fetch directories from other 37739 authdirservers, to stay better synced. 37740 - Running-routers list tells who's down also, along with noting 37741 if they're verified (listed by nickname) or unverified (listed 37742 by hash-of-key). 37743 - Allow dirservers to serve running-router list separately. 37744 This isn't used yet. 37745 - ORs connect-on-demand to other ORs 37746 - If you get an extend cell to an OR you're not connected to, 37747 connect, handshake, and forward the create cell. 37748 - The authoritative dirservers stay connected to everybody, 37749 and everybody stays connected to 0.0.7 servers, but otherwise 37750 clients/servers expire unused connections after 5 minutes. 37751 - When servers get a sigint, they delay 30 seconds (refusing new 37752 connections) then exit. A second sigint causes immediate exit. 37753 - File and name management: 37754 - Look for .torrc if no CONFDIR "torrc" is found. 37755 - If no datadir is defined, then choose, make, and secure ~/.tor 37756 as datadir. 37757 - If torrc not found, exitpolicy reject *:*. 37758 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma). 37759 - If no nickname is defined, derive default from hostname. 37760 - Rename secret key files, e.g. identity.key -> secret_id_key, 37761 to discourage people from mailing their identity key to tor-ops. 37762 - Refuse to build a circuit before the directory has arrived -- 37763 it won't work anyway, since you won't know the right onion keys 37764 to use. 37765 - Try other dirservers immediately if the one you try is down. This 37766 should tolerate down dirservers better now. 37767 - Parse tor version numbers so we can do an is-newer-than check 37768 rather than an is-in-the-list check. 37769 - New socks command 'resolve', to let us shim gethostbyname() 37770 locally. 37771 - A 'tor_resolve' script to access the socks resolve functionality. 37772 - A new socks-extensions.txt doc file to describe our 37773 interpretation and extensions to the socks protocols. 37774 - Add a ContactInfo option, which gets published in descriptor. 37775 - Publish OR uptime in descriptor (and thus in directory) too. 37776 - Write tor version at the top of each log file 37777 - New docs in the tarball: 37778 - tor-doc.html. 37779 - Document that you should proxy your SSL traffic too. 37780 37781 37782Changes in version 0.0.7.2 - 2004-07-07 37783 o A better fix for the 0.0.0.0 problem, that will hopefully 37784 eliminate the remaining related assertion failures. 37785 37786 37787Changes in version 0.0.7.1 - 2004-07-04 37788 o When an address resolves to 0.0.0.0, treat it as a failed resolve, 37789 since internally we use 0.0.0.0 to signify "not yet resolved". 37790 37791 37792Changes in version 0.0.7 - 2004-06-07 37793 o Updated the man page to reflect the new features. 37794 37795 37796Changes in version 0.0.7rc2 - 2004-06-06 37797 o Changes from 0.0.7rc1: 37798 - Make it build on Win32 again. 37799 o Changes from 0.0.6.2: 37800 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config 37801 settings too. 37802 37803 37804Changes in version 0.0.7rc1 - 2004-06-02 37805 o Bugfixes: 37806 - On sighup, we were adding another log without removing the first 37807 one. So log messages would get duplicated n times for n sighups. 37808 - Several cases of using a connection after we'd freed it. The 37809 problem was that connections that are pending resolve are in both 37810 the pending_resolve tree, and also the circuit's resolving_streams 37811 list. When you want to remove one, you must remove it from both. 37812 - Fix a double-mark-for-close where an end cell arrived for a 37813 resolving stream, and then the resolve failed. 37814 - Check directory signatures based on name of signer, not on whom 37815 we got the directory from. This will let us cache directories more 37816 easily. 37817 o Features: 37818 - Crank up some of our constants to handle more users. 37819 37820 37821Changes in version 0.0.7pre1 - 2004-06-02 37822 o Fixes for crashes and other obnoxious bugs: 37823 - Fix an epipe bug: sometimes when directory connections failed 37824 to connect, we would give them a chance to flush before closing 37825 them. 37826 - When we detached from a circuit because of resolvefailed, we 37827 would immediately try the same circuit twice more, and then 37828 give up on the resolve thinking we'd tried three different 37829 exit nodes. 37830 - Limit the number of intro circuits we'll attempt to build for a 37831 hidden service per 15-minute period. 37832 - Check recommended-software string *early*, before actually parsing 37833 the directory. Thus we can detect an obsolete version and exit, 37834 even if the new directory format doesn't parse. 37835 o Fixes for security bugs: 37836 - Remember which nodes are dirservers when you startup, and if a 37837 random OR enables his dirport, don't automatically assume he's 37838 a trusted dirserver. 37839 o Other bugfixes: 37840 - Directory connections were asking the wrong poll socket to 37841 start writing, and not asking themselves to start writing. 37842 - When we detached from a circuit because we sent a begin but 37843 didn't get a connected, we would use it again the first time; 37844 but after that we would correctly switch to a different one. 37845 - Stop warning when the first onion decrypt attempt fails; they 37846 will sometimes legitimately fail now that we rotate keys. 37847 - Override unaligned-access-ok check when $host_cpu is ia64 or 37848 arm. Apparently they allow it but the kernel whines. 37849 - Dirservers try to reconnect periodically too, in case connections 37850 have failed. 37851 - Fix some memory leaks in directory servers. 37852 - Allow backslash in Win32 filenames. 37853 - Made Tor build complain-free on FreeBSD, hopefully without 37854 breaking other BSD builds. We'll see. 37855 o Features: 37856 - Doxygen markup on all functions and global variables. 37857 - Make directory functions update routerlist, not replace it. So 37858 now directory disagreements are not so critical a problem. 37859 - Remove the upper limit on number of descriptors in a dirserver's 37860 directory (not that we were anywhere close). 37861 - Allow multiple logfiles at different severity ranges. 37862 - Allow *BindAddress to specify ":port" rather than setting *Port 37863 separately. Allow multiple instances of each BindAddress config 37864 option, so you can bind to multiple interfaces if you want. 37865 - Allow multiple exit policy lines, which are processed in order. 37866 Now we don't need that huge line with all the commas in it. 37867 - Enable accept/reject policies on SOCKS connections, so you can bind 37868 to 0.0.0.0 but still control who can use your OP. 37869 37870 37871Changes in version 0.0.6.2 - 2004-05-16 37872 o Our integrity-checking digest was checking only the most recent cell, 37873 not the previous cells like we'd thought. 37874 Thanks to Stefan Mark for finding the flaw! 37875 37876 37877Changes in version 0.0.6.1 - 2004-05-06 37878 o Fix two bugs in our AES counter-mode implementation (this affected 37879 onion-level stream encryption, but not TLS-level). It turns 37880 out we were doing something much more akin to a 16-character 37881 polyalphabetic cipher. Oops. 37882 Thanks to Stefan Mark for finding the flaw! 37883 o Retire moria3 as a directory server, and add tor26 as a directory 37884 server. 37885 37886 37887Changes in version 0.0.6 - 2004-05-02 37888 [version bump only] 37889 37890 37891Changes in version 0.0.6rc4 - 2004-05-01 37892 o Update the built-in dirservers list to use the new directory format 37893 o Fix a rare seg fault: if a node offering a hidden service attempts 37894 to build a circuit to Alice's rendezvous point and fails before it 37895 reaches the last hop, it retries with a different circuit, but 37896 then dies. 37897 o Handle windows socket errors correctly. 37898 37899 37900Changes in version 0.0.6rc3 - 2004-04-28 37901 o Don't expire non-general excess circuits (if we had enough 37902 circuits open, we were expiring rendezvous circuits -- even 37903 when they had a stream attached. oops.) 37904 o Fetch randomness from /dev/urandom better (not via fopen/fread) 37905 o Better debugging for tls errors 37906 o Some versions of openssl have an SSL_pending function that erroneously 37907 returns bytes when there is a non-application record pending. 37908 o Set Content-Type on the directory and hidserv descriptor. 37909 o Remove IVs from cipher code, since AES-ctr has none. 37910 o Win32 fixes. Tor now compiles on win32 with no warnings/errors. 37911 o We were using an array of length zero in a few places. 37912 o win32's gethostbyname can't resolve an IP to an IP. 37913 o win32's close can't close a socket. 37914 37915 37916Changes in version 0.0.6rc2 - 2004-04-26 37917 o Fix a bug where we were closing tls connections intermittently. 37918 It turns out openssl keeps its errors around -- so if an error 37919 happens, and you don't ask about it, and then another openssl 37920 operation happens and succeeds, and you ask if there was an error, 37921 it tells you about the first error. Fun fun. 37922 o Fix a bug that's been lurking since 27 may 03 (!) 37923 When passing back a destroy cell, we would use the wrong circ id. 37924 'Mostly harmless', but still worth fixing. 37925 o Since we don't support truncateds much, don't bother sending them; 37926 just close the circ. 37927 o check for <machine/limits.h> so we build on NetBSD again (I hope). 37928 o don't crash if a conn that sent a begin has suddenly lost its circuit 37929 (this was quite rare). 37930 37931 37932Changes in version 0.0.6rc1 - 2004-04-25 37933 o We now rotate link (tls context) keys and onion keys. 37934 o CREATE cells now include oaep padding, so you can tell 37935 if you decrypted them correctly. 37936 o Add bandwidthburst to server descriptor. 37937 o Directories now say which dirserver signed them. 37938 o Use a tor_assert macro that logs failed assertions too. 37939 37940 37941Changes in version 0.0.6pre5 - 2004-04-18 37942 o changes from 0.0.6pre4: 37943 - make tor build on broken freebsd 5.2 installs 37944 - fix a failed assert when you try an intro point, get a nack, and try 37945 a second one and it works. 37946 - when alice uses a port that the hidden service doesn't accept, 37947 it now sends back an end cell (denied by exit policy). otherwise 37948 alice would just have to wait to time out. 37949 - fix another rare bug: when we had tried all the intro 37950 points for a hidden service, we fetched the descriptor 37951 again, but we left our introcirc thinking it had already 37952 sent an intro, so it kept waiting for a response... 37953 - bugfix: when you sleep your hidden-service laptop, as soon 37954 as it wakes up it tries to upload a service descriptor, but 37955 socketpair fails for some reason (localhost not up yet?). 37956 now we simply give up on that upload, and we'll try again later. 37957 i'd still like to find the bug though. 37958 - if an intro circ waiting for an ack dies before getting one, then 37959 count it as a nack 37960 - we were reusing stale service descriptors and refetching usable 37961 ones. oops. 37962 37963 37964Changes in version 0.0.6pre4 - 2004-04-14 37965 o changes from 0.0.6pre3: 37966 - when bob fails to connect to the rendezvous point, and his 37967 circ didn't fail because of the rendezvous point itself, then 37968 he retries a couple of times 37969 - we expire introduction and rendezvous circs more thoroughly 37970 (sometimes they were hanging around forever) 37971 - we expire unattached rendezvous streams that have been around 37972 too long (they were sticking around forever). 37973 - fix a measly fencepost error that was crashing everybody with 37974 a strict glibc. 37975 37976 37977Changes in version 0.0.6pre3 - 2004-04-14 37978 o changes from 0.0.6pre2: 37979 - make hup work again 37980 - fix some memory leaks for dirservers 37981 - allow more skew in rendezvous descriptor timestamps, to help 37982 handle people like blanu who don't know what time it is 37983 - normal circs are 3 hops, but some rend/intro circs are 4, if 37984 the initiator doesn't get to choose the last hop 37985 - send acks for introductions, so alice can know whether to try 37986 again 37987 - bob publishes intro points more correctly 37988 o changes from 0.0.5: 37989 - fix an assert trigger that's been plaguing us since the days 37990 of 0.0.2prexx (thanks weasel!) 37991 - retry stream correctly when we fail to connect because of 37992 exit-policy-reject (should try another) or can't-resolve-address 37993 (also should try another, because dns on random internet servers 37994 is flaky). 37995 - when we hup a dirserver and we've *removed* a server from the 37996 approved-routers list, now we remove that server from the 37997 in-memory directories too 37998 37999 38000Changes in version 0.0.6pre2 - 2004-04-08 38001 o We fixed our base32 implementation. Now it works on all architectures. 38002 38003 38004Changes in version 0.0.6pre1 - 2004-04-08 38005 o Features: 38006 - Hidden services and rendezvous points are implemented. Go to 38007 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available 38008 hidden services. (This only works via a socks4a proxy such as 38009 Privoxy, and currently it's quite slow.) 38010 38011 38012Changes in version 0.0.5 - 2004-03-30 38013 [version bump only] 38014 38015 38016Changes in version 0.0.5rc3 - 2004-03-29 38017 o Install torrc as torrc.sample -- we no longer clobber your 38018 torrc. (Woo!) 38019 o Re-enable recommendedversion checking (we broke it in rc2, oops) 38020 o Add in a 'notice' log level for things the operator should hear 38021 but that aren't warnings 38022 38023 38024Changes in version 0.0.5rc2 - 2004-03-29 38025 o Hold socks connection open until reply is flushed (if possible) 38026 o Make exit nodes resolve IPs to IPs immediately, rather than asking 38027 the dns farm to do it. 38028 o Fix c99 aliasing warnings in rephist.c 38029 o Don't include server descriptors that are older than 24 hours in the 38030 directory. 38031 o Give socks 'reject' replies their whole 15s to attempt to flush, 38032 rather than seeing the 60s timeout and assuming the flush had failed. 38033 o Clean automake droppings from the cvs repository 38034 38035 38036Changes in version 0.0.5rc1 - 2004-03-28 38037 o Fix mangled-state bug in directory fetching (was causing sigpipes). 38038 o Only build circuits after we've fetched the directory: clients were 38039 using only the directory servers before they'd fetched a directory. 38040 This also means longer startup time; so it goes. 38041 o Fix an assert trigger where an OP would fail to handshake, and we'd 38042 expect it to have a nickname. 38043 o Work around a tsocks bug: do a socks reject when AP connection dies 38044 early, else tsocks goes into an infinite loop. 38045 38046 38047Changes in version 0.0.4 - 2004-03-26 38048 o When connecting to a dirserver or OR and the network is down, 38049 we would crash. 38050 38051 38052Changes in version 0.0.3 - 2004-03-26 38053 o Warn and fail if server chose a nickname with illegal characters 38054 o Port to Solaris and Sparc: 38055 - include missing header fcntl.h 38056 - have autoconf find -lsocket -lnsl automatically 38057 - deal with hardware word alignment 38058 - make uname() work (solaris has a different return convention) 38059 - switch from using signal() to sigaction() 38060 o Preliminary work on reputation system: 38061 - Keep statistics on success/fail of connect attempts; they're published 38062 by kill -USR1 currently. 38063 - Add a RunTesting option to try to learn link state by creating test 38064 circuits, even when SocksPort is off. 38065 - Remove unused open circuits when there are too many. 38066 38067 38068Changes in version 0.0.2 - 2004-03-19 38069 - Include strlcpy and strlcat for safer string ops 38070 - define INADDR_NONE so we compile (but still not run) on solaris 38071 38072 38073Changes in version 0.0.2pre27 - 2004-03-14 38074 o Bugfixes: 38075 - Allow internal tor networks (we were rejecting internal IPs, 38076 now we allow them if they're set explicitly). 38077 - And fix a few endian issues. 38078 38079 38080Changes in version 0.0.2pre26 - 2004-03-14 38081 o New features: 38082 - If a stream times out after 15s without a connected cell, don't 38083 try that circuit again: try a new one. 38084 - Retry streams at most 4 times. Then give up. 38085 - When a dirserver gets a descriptor from an unknown router, it 38086 logs its fingerprint (so the dirserver operator can choose to 38087 accept it even without mail from the server operator). 38088 - Inform unapproved servers when we reject their descriptors. 38089 - Make tor build on Windows again. It works as a client, who knows 38090 about as a server. 38091 - Clearer instructions in the torrc for how to set up a server. 38092 - Be more efficient about reading fd's when our global token bucket 38093 (used for rate limiting) becomes empty. 38094 o Bugfixes: 38095 - Stop asserting that computers always go forward in time. It's 38096 simply not true. 38097 - When we sent a cell (e.g. destroy) and then marked an OR connection 38098 expired, we might close it before finishing a flush if the other 38099 side isn't reading right then. 38100 - Don't allow dirservers to start if they haven't defined 38101 RecommendedVersions 38102 - We were caching transient dns failures. Oops. 38103 - Prevent servers from publishing an internal IP as their address. 38104 - Address a strcat vulnerability in circuit.c 38105 38106 38107Changes in version 0.0.2pre25 - 2004-03-04 38108 o New features: 38109 - Put the OR's IP in its router descriptor, not its fqdn. That way 38110 we'll stop being stalled by gethostbyname for nodes with flaky dns, 38111 e.g. poblano. 38112 o Bugfixes: 38113 - If the user typed in an address that didn't resolve, the server 38114 crashed. 38115 38116 38117Changes in version 0.0.2pre24 - 2004-03-03 38118 o Bugfixes: 38119 - Fix an assertion failure in dns.c, where we were trying to dequeue 38120 a pending dns resolve even if it wasn't pending 38121 - Fix a spurious socks5 warning about still trying to write after the 38122 connection is finished. 38123 - Hold certain marked_for_close connections open until they're finished 38124 flushing, rather than losing bytes by closing them too early. 38125 - Correctly report the reason for ending a stream 38126 - Remove some duplicate calls to connection_mark_for_close 38127 - Put switch_id and start_daemon earlier in the boot sequence, so it 38128 will actually try to chdir() to options.DataDirectory 38129 - Make 'make test' exit(1) if a test fails; fix some unit tests 38130 - Make tor fail when you use a config option it doesn't know about, 38131 rather than warn and continue. 38132 - Make --version work 38133 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date 38134 38135 38136Changes in version 0.0.2pre23 - 2004-02-29 38137 o New features: 38138 - Print a statement when the first circ is finished, so the user 38139 knows it's working. 38140 - If a relay cell is unrecognized at the end of the circuit, 38141 send back a destroy. (So attacks to mutate cells are more 38142 clearly thwarted.) 38143 - New config option 'excludenodes' to avoid certain nodes for circuits. 38144 - When it daemonizes, it chdir's to the DataDirectory rather than "/", 38145 so you can collect coredumps there. 38146 o Bugfixes: 38147 - Fix a bug in tls flushing where sometimes data got wedged and 38148 didn't flush until more data got sent. Hopefully this bug was 38149 a big factor in the random delays we were seeing. 38150 - Make 'connected' cells include the resolved IP, so the client 38151 dns cache actually gets populated. 38152 - Disallow changing from ORPort=0 to ORPort>0 on hup. 38153 - When we time-out on a stream and detach from the circuit, send an 38154 end cell down it first. 38155 - Only warn about an unknown router (in exitnodes, entrynodes, 38156 excludenodes) after we've fetched a directory. 38157 38158 38159Changes in version 0.0.2pre22 - 2004-02-26 38160 o New features: 38161 - Servers publish less revealing uname information in descriptors. 38162 - More memory tracking and assertions, to crash more usefully when 38163 errors happen. 38164 - If the default torrc isn't there, just use some default defaults. 38165 Plus provide an internal dirservers file if they don't have one. 38166 - When the user tries to use Tor as an http proxy, give them an http 38167 501 failure explaining that we're a socks proxy. 38168 - Dump a new router.desc on hup, to help confused people who change 38169 their exit policies and then wonder why router.desc doesn't reflect 38170 it. 38171 - Clean up the generic tor.sh init script that we ship with. 38172 o Bugfixes: 38173 - If the exit stream is pending on the resolve, and a destroy arrives, 38174 then the stream wasn't getting removed from the pending list. I 38175 think this was the one causing recent server crashes. 38176 - Use a more robust poll on OSX 10.3, since their poll is flaky. 38177 - When it couldn't resolve any dirservers, it was useless from then on. 38178 Now it reloads the RouterFile (or default dirservers) if it has no 38179 dirservers. 38180 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out 38181 many users don't even *have* a /usr/local/sbin/. 38182 38183 38184Changes in version 0.0.2pre21 - 2004-02-18 38185 o New features: 38186 - There's a ChangeLog file that actually reflects the changelog. 38187 - There's a 'torify' wrapper script, with an accompanying 38188 tor-tsocks.conf, that simplifies the process of using tsocks for 38189 tor. It even has a man page. 38190 - The tor binary gets installed to sbin rather than bin now. 38191 - Retry streams where the connected cell hasn't arrived in 15 seconds 38192 - Clean up exit policy handling -- get the default out of the torrc, 38193 so we can update it without forcing each server operator to fix 38194 his/her torrc. 38195 - Allow imaps and pop3s in default exit policy 38196 o Bugfixes: 38197 - Prevent picking middleman nodes as the last node in the circuit 38198 38199 38200Changes in version 0.0.2pre20 - 2004-01-30 38201 o New features: 38202 - We now have a deb package, and it's in debian unstable. Go to 38203 it, apt-getters. :) 38204 - I've split the TotalBandwidth option into BandwidthRate (how many 38205 bytes per second you want to allow, long-term) and 38206 BandwidthBurst (how many bytes you will allow at once before the cap 38207 kicks in). This better token bucket approach lets you, say, set 38208 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good 38209 performance while not exceeding your monthly bandwidth quota. 38210 - Push out a tls record's worth of data once you've got it, rather 38211 than waiting until you've read everything waiting to be read. This 38212 may improve performance by pipelining better. We'll see. 38213 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach 38214 from failed circuits (if they haven't been connected yet) and attach 38215 to new ones. 38216 - Expire old streams that haven't managed to connect. Some day we'll 38217 have them reattach to new circuits instead. 38218 38219 o Bugfixes: 38220 - Fix several memory leaks that were causing servers to become bloated 38221 after a while. 38222 - Fix a few very rare assert triggers. A few more remain. 38223 - Setuid to User _before_ complaining about running as root. 38224 38225 38226Changes in version 0.0.2pre19 - 2004-01-07 38227 o Bugfixes: 38228 - Fix deadlock condition in dns farm. We were telling a child to die by 38229 closing the parent's file descriptor to him. But newer children were 38230 inheriting the open file descriptor from the parent, and since they 38231 weren't closing it, the socket never closed, so the child never read 38232 eof, so he never knew to exit. Similarly, dns workers were holding 38233 open other sockets, leading to all sorts of chaos. 38234 - New cleaner daemon() code for forking and backgrounding. 38235 - If you log to a file, it now prints an entry at the top of the 38236 logfile so you know it's working. 38237 - The onionskin challenge length was 30 bytes longer than necessary. 38238 - Started to patch up the spec so it's not quite so out of date. 38239 38240 38241Changes in version 0.0.2pre18 - 2004-01-02 38242 o Bugfixes: 38243 - Fix endian issues with the 'integrity' field in the relay header. 38244 - Fix a potential bug where connections in state 38245 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write. 38246 38247 38248Changes in version 0.0.2pre17 - 2003-12-30 38249 o Bugfixes: 38250 - Made --debuglogfile (or any second log file, actually) work. 38251 - Resolved an edge case in get_unique_circ_id_by_conn where a smart 38252 adversary could force us into an infinite loop. 38253 38254 o Features: 38255 - Each onionskin handshake now includes a hash of the computed key, 38256 to prove the server's identity and help perfect forward secrecy. 38257 - Changed cell size from 256 to 512 bytes (working toward compatibility 38258 with MorphMix). 38259 - Changed cell length to 2 bytes, and moved it to the relay header. 38260 - Implemented end-to-end integrity checking for the payloads of 38261 relay cells. 38262 - Separated streamid from 'recognized' (otherwise circuits will get 38263 messed up when we try to have streams exit from the middle). We 38264 use the integrity-checking to confirm that a cell is addressed to 38265 this hop. 38266 - Randomize the initial circid and streamid values, so an adversary who 38267 breaks into a node can't learn how many circuits or streams have 38268 been made so far. 38269 38270 38271Changes in version 0.0.2pre16 - 2003-12-14 38272 o Bugfixes: 38273 - Fixed a bug that made HUP trigger an assert 38274 - Fixed a bug where a circuit that immediately failed wasn't being 38275 counted as a failed circuit in counting retries. 38276 38277 o Features: 38278 - Now we close the circuit when we get a truncated cell: otherwise we're 38279 open to an anonymity attack where a bad node in the path truncates 38280 the circuit and then we open streams at him. 38281 - Add port ranges to exit policies 38282 - Add a conservative default exit policy 38283 - Warn if you're running tor as root 38284 - on HUP, retry OR connections and close/rebind listeners 38285 - options.EntryNodes: try these nodes first when picking the first node 38286 - options.ExitNodes: if your best choices happen to include any of 38287 your preferred exit nodes, you choose among just those preferred 38288 exit nodes. 38289 - options.ExcludedNodes: nodes that are never picked in path building 38290 38291 38292Changes in version 0.0.2pre15 - 2003-12-03 38293 o Robustness and bugfixes: 38294 - Sometimes clients would cache incorrect DNS resolves, which would 38295 really screw things up. 38296 - An OP that goes offline would slowly leak all its sockets and stop 38297 working. 38298 - A wide variety of bugfixes in exit node selection, exit policy 38299 handling, and processing pending streams when a new circuit is 38300 established. 38301 - Pick nodes for a path only from those the directory says are up 38302 - Choose randomly from all running dirservers, not always the first one 38303 - Increase allowed http header size for directory fetch. 38304 - Stop writing to stderr (if we're daemonized it will be closed). 38305 - Enable -g always, so cores will be more useful to me. 38306 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions. 38307 38308 o Documentation: 38309 - Wrote a man page. It lists commonly used options. 38310 38311 o Configuration: 38312 - Change default loglevel to warn. 38313 - Make PidFile default to null rather than littering in your CWD. 38314 - OnionRouter config option is now obsolete. Instead it just checks 38315 ORPort>0. 38316 - Moved to a single unified torrc file for both clients and servers. 38317 38318 38319Changes in version 0.0.2pre14 - 2003-11-29 38320 o Robustness and bugfixes: 38321 - Force the admin to make the DataDirectory himself 38322 - to get ownership/permissions right 38323 - so clients no longer make a DataDirectory and then never use it 38324 - fix bug where a client who was offline for 45 minutes would never 38325 pull down a directory again 38326 - fix (or at least hide really well) the dns assert bug that was 38327 causing server crashes 38328 - warnings and improved robustness wrt clockskew for certs 38329 - use the native daemon(3) to daemonize, when available 38330 - exit if bind() fails 38331 - exit if neither socksport nor orport is defined 38332 - include our own tor_timegm (Win32 doesn't have its own) 38333 - bugfix for win32 with lots of connections 38334 - fix minor bias in PRNG 38335 - make dirserver more robust to corrupt cached directory 38336 38337 o Documentation: 38338 - Wrote the design document (woo) 38339 38340 o Circuit building and exit policies: 38341 - Circuits no longer try to use nodes that the directory has told them 38342 are down. 38343 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and 38344 bitcounts (18.0.0.0/8). 38345 - Make AP connections standby for a circuit if no suitable circuit 38346 exists, rather than failing 38347 - Circuits choose exit node based on addr/port, exit policies, and 38348 which AP connections are standing by 38349 - Bump min pathlen from 2 to 3 38350 - Relay end cells have a payload to describe why the stream ended. 38351 - If the stream failed because of exit policy, try again with a new 38352 circuit. 38353 - Clients have a dns cache to remember resolved addresses. 38354 - Notice more quickly when we have no working circuits 38355 38356 o Configuration: 38357 - APPort is now called SocksPort 38358 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure 38359 where to bind 38360 - RecommendedVersions is now a config variable rather than 38361 hardcoded (for dirservers) 38362 - Reloads config on HUP 38363 - Usage info on -h or --help 38364 - If you set User and Group config vars, it'll setu/gid to them. 38365 38366 38367Changes in version 0.0.2pre13 - 2003-10-19 38368 o General stability: 38369 - SSL_write no longer fails when it returns WANTWRITE and the number 38370 of bytes in the buf has changed by the next SSL_write call. 38371 - Fix segfault fetching directory when network is down 38372 - Fix a variety of minor memory leaks 38373 - Dirservers reload the fingerprints file on HUP, so I don't have 38374 to take down the network when I approve a new router 38375 - Default server config file has explicit Address line to specify fqdn 38376 38377 o Buffers: 38378 - Buffers grow and shrink as needed (Cut process size from 20M to 2M) 38379 - Make listener connections not ever alloc bufs 38380 38381 o Autoconf improvements: 38382 - don't clobber an external CFLAGS in ./configure 38383 - Make install now works 38384 - create var/lib/tor on make install 38385 - autocreate a tor.sh initscript to help distribs 38386 - autocreate the torrc and sample-server-torrc with correct paths 38387 38388 o Log files and Daemonizing now work: 38389 - If --DebugLogFile is specified, log to it at -l debug 38390 - If --LogFile is specified, use it instead of commandline 38391 - If --RunAsDaemon is set, tor forks and backgrounds on startup 38392