1#!/bin/sh 2#- 3# Copyright (c) 2016 Bartek Rutkowski 4# All rights reserved. 5# 6# Redistribution and use in source and binary forms, with or without 7# modification, are permitted provided that the following conditions 8# are met: 9# 1. Redistributions of source code must retain the above copyright 10# notice, this list of conditions and the following disclaimer. 11# 2. Redistributions in binary form must reproduce the above copyright 12# notice, this list of conditions and the following disclaimer in the 13# documentation and/or other materials provided with the distribution. 14# 15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25# SUCH DAMAGE. 26# 27# $FreeBSD$ 28 29: ${BSDDIALOG_OK=0} 30 31echo -n > $BSDINSTALL_TMPETC/rc.conf.hardening 32echo -n > $BSDINSTALL_TMPETC/sysctl.conf.hardening 33echo -n > $BSDINSTALL_TMPBOOT/loader.conf.hardening 34 35exec 3>&1 36FEATURES=$( bsddialog --backtitle "FreeBSD Installer" \ 37 --title "System Hardening" --nocancel --separate-output \ 38 --checklist "Choose system security hardening options:" \ 39 0 0 0 \ 40 "0 hide_uids" "Hide processes running as other users" ${hide_uids:-off} \ 41 "1 hide_gids" "Hide processes running as other groups" ${hide_gids:-off} \ 42 "2 hide_jail" "Hide processes running in jails" ${hide_jail:-off} \ 43 "3 read_msgbuf" "Disable reading kernel message buffer for unprivileged users" ${read_msgbuf:-off} \ 44 "4 proc_debug" "Disable process debugging facilities for unprivileged users" ${proc_debug:-off} \ 45 "5 random_pid" "Randomize the PID of newly created processes" ${random_pid:-off} \ 46 "6 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \ 47 "7 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \ 48 "8 disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \ 49 "9 secure_console" "Enable console password prompt" ${secure_console:-off} \ 50 "10 disable_ddtrace" "Disallow DTrace destructive-mode" ${disable_ddtrace:-off} \ 512>&1 1>&3 ) 52retval=$? 53exec 3>&- 54 55if [ $retval -ne $BSDDIALOG_OK ]; then 56 exit 1 57fi 58 59for feature in $FEATURES; do 60 case "$feature" in 61 hide_uids) 62 echo security.bsd.see_other_uids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 63 ;; 64 hide_gids) 65 echo security.bsd.see_other_gids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 66 ;; 67 hide_jail) 68 echo security.bsd.see_jail_proc=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 69 ;; 70 read_msgbuf) 71 echo security.bsd.unprivileged_read_msgbuf=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 72 ;; 73 proc_debug) 74 echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 75 ;; 76 random_pid) 77 echo kern.randompid=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 78 ;; 79 clear_tmp) 80 echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 81 ;; 82 disable_syslogd) 83 echo 'syslogd_flags="-ss"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 84 ;; 85 disable_sendmail) 86 echo 'sendmail_enable="NONE"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 87 ;; 88 secure_console) 89 sed "s/unknown off secure/unknown off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening 90 ;; 91 disable_ddtrace) 92 echo 'security.bsd.allow_destructive_dtrace=0' >> $BSDINSTALL_TMPBOOT/loader.conf.hardening 93 ;; 94 esac 95done 96