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: ${DIALOG_OK=0}
30
31echo -n > $BSDINSTALL_TMPETC/rc.conf.hardening
32echo -n > $BSDINSTALL_TMPETC/sysctl.conf.hardening
33
34exec 3>&1
35FEATURES=$( dialog --backtitle "FreeBSD Installer" \
36    --title "System Hardening" --nocancel --separate-output \
37    --checklist "Choose system security hardening options:" \
38    0 0 0 \
39	"0 hide_uids" "Hide processes running as other users" ${hide_uids:-off} \
40	"1 hide_gids" "Hide processes running as other groups" ${hide_gids:-off} \
41	"2 hide_jail" "Hide processes running in jails" ${hide_jail:-off} \
42	"3 read_msgbuf" "Disable reading kernel message buffer for unprivileged users" ${read_msgbuf:-off} \
43	"4 proc_debug" "Disable process debugging facilities for unprivileged users" ${proc_debug:-off} \
44	"5 random_pid" "Randomize the PID of newly created processes" ${random_pid:-off} \
45	"6 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \
46	"7 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \
47	"8 disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \
48	"9 secure_console" "Enable console password prompt" ${secure_console:-off} \
492>&1 1>&3 )
50exec 3>&-
51
52for feature in $FEATURES; do
53	if [ "$feature" = "hide_uids" ]; then
54		echo security.bsd.see_other_uids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
55	fi
56	if [ "$feature" = "hide_gids" ]; then
57		echo security.bsd.see_other_gids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
58	fi
59	if [ "$feature" = "hide_jail" ]; then
60		echo security.bsd.see_jail_proc=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
61	fi
62	if [ "$feature" = "read_msgbuf" ]; then
63		echo security.bsd.unprivileged_read_msgbuf=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
64	fi
65	if [ "$feature" = "proc_debug" ]; then
66		echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
67	fi
68	if [ "$feature" = "random_pid" ]; then
69		echo kern.randompid=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
70	fi
71	if [ "$feature" = "clear_tmp" ]; then
72		echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
73	fi
74	if [ "$feature" = "disable_syslogd" ]; then
75		echo 'syslogd_flags="-ss"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
76	fi
77	if [ "$feature" = "disable_sendmail" ]; then
78		echo 'sendmail_enable="NONE"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
79	fi
80	if [ "$feature" = "secure_console" ]; then
81		sed "s/unknown	off secure/unknown	off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening
82	fi
83done
84
85