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 stack_guard" "Set stack guard buffer size to 2MB" ${stack_guard:-off} \ 46 "7 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \ 47 "8 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \ 48 "9 disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \ 49 "9 secure_console" "Enable console password prompt" ${secure_console:-off} \ 502>&1 1>&3 ) 51exec 3>&- 52 53for feature in $FEATURES; do 54 if [ "$feature" = "hide_uids" ]; then 55 echo security.bsd.see_other_uids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 56 fi 57 if [ "$feature" = "hide_gids" ]; then 58 echo security.bsd.see_other_gids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 59 fi 60 if [ "$feature" = "hide_jail" ]; then 61 echo security.bsd.see_jail_proc=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 62 fi 63 if [ "$feature" = "read_msgbuf" ]; then 64 echo security.bsd.unprivileged_read_msgbuf=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 65 fi 66 if [ "$feature" = "proc_debug" ]; then 67 echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 68 fi 69 if [ "$feature" = "random_pid" ]; then 70 echo kern.randompid=$(jot -r 1 9999) >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 71 fi 72 if [ "$feature" = "stack_guard" ]; then 73 echo security.bsd.stack_guard_page=512 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening 74 fi 75 if [ "$feature" = "clear_tmp" ]; then 76 echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 77 fi 78 if [ "$feature" = "disable_syslogd" ]; then 79 echo 'syslogd_flags="-ss"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 80 fi 81 if [ "$feature" = "disable_sendmail" ]; then 82 echo 'sendmail_enable="NONE"' >> $BSDINSTALL_TMPETC/rc.conf.hardening 83 fi 84 if [ "$feature" = "secure_console" ]; then 85 sed "s/unknown off secure/unknown off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening 86 fi 87done 88 89