3 # Copyright (c) 2016 Bartek Rutkowski
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
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.
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
29 BSDCFG_SHARE="/usr/share/bsdconfig"
30 . $BSDCFG_SHARE/common.subr || exit 1
34 echo -n > $BSDINSTALL_TMPETC/rc.conf.hardening
35 echo -n > $BSDINSTALL_TMPETC/sysctl.conf.hardening
36 echo -n > $BSDINSTALL_TMPBOOT/loader.conf.hardening
39 FEATURES=$( bsddialog --backtitle "$OSNAME Installer" \
40 --title "System Hardening" --nocancel --separate-output \
41 --checklist "Choose system security hardening options:" \
43 "0 hide_uids" "Hide processes running as other users" ${hide_uids:-off} \
44 "1 hide_gids" "Hide processes running as other groups" ${hide_gids:-off} \
45 "2 hide_jail" "Hide processes running in jails" ${hide_jail:-off} \
46 "3 read_msgbuf" "Disable reading kernel message buffer for unprivileged users" ${read_msgbuf:-off} \
47 "4 proc_debug" "Disable process debugging facilities for unprivileged users" ${proc_debug:-off} \
48 "5 random_pid" "Randomize the PID of newly created processes" ${random_pid:-off} \
49 "6 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \
50 "7 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \
51 "8 disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \
52 "9 secure_console" "Enable console password prompt" ${secure_console:-off} \
53 "10 disable_ddtrace" "Disallow DTrace destructive-mode" ${disable_ddtrace:-off} \
58 if [ $retval -ne $BSDDIALOG_OK ]; then
62 for feature in $FEATURES; do
65 echo security.bsd.see_other_uids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
68 echo security.bsd.see_other_gids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
71 echo security.bsd.see_jail_proc=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
74 echo security.bsd.unprivileged_read_msgbuf=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
77 echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
80 echo kern.randompid=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening
83 echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
86 echo 'syslogd_flags="-ss"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
89 echo 'sendmail_enable="NONE"' >> $BSDINSTALL_TMPETC/rc.conf.hardening
92 sed "s/unknown off secure/unknown off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening
95 echo 'security.bsd.allow_destructive_dtrace=0' >> $BSDINSTALL_TMPBOOT/loader.conf.hardening