Author: robak (ports committer)
Date: Fri Jul 15 15:07:24 2016
New Revision: 302897
URL: https://svnweb.freebsd.org/changeset/base/302897
Log:
Add new System Hardening menu and options to bsdinstall.
This patch add new 'hardening' file responsible for new bsdinstall
'System Hardening' menu allowing users to set some sane and carefully
picked system security options (like random process id's, hiding
other users/groups processes and others).
All options are OFF by default in this patch due to POLA principle
with intention to turn change some of them to ON by default in future.
Reviewed by: adrian, allanjude, bdrewery, nwhitehorn
Approved by: adrian, allanjude
MFC after: 7 days
Added:
head/usr.sbin/bsdinstall/scripts/hardening (contents, props changed)
Modified:
head/usr.sbin/bsdinstall/scripts/Makefile
head/usr.sbin/bsdinstall/scripts/auto
head/usr.sbin/bsdinstall/scripts/config
Modified: head/usr.sbin/bsdinstall/scripts/Makefile
==============================================================================
--- head/usr.sbin/bsdinstall/scripts/Makefile Fri Jul 15 13:25:47 2016
(r302896)
+++ head/usr.sbin/bsdinstall/scripts/Makefile Fri Jul 15 15:07:24 2016
(r302897)
@@ -1,6 +1,6 @@
# $FreeBSD$
-SCRIPTS= auto adduser checksum config docsinstall entropy hostname jail \
+SCRIPTS= auto adduser checksum config docsinstall entropy hardening hostname
jail \
keymap mirrorselect mount netconfig netconfig_ipv4 netconfig_ipv6 \
rootpass script services time umount wlanconfig zfsboot
BINDIR= ${LIBEXECDIR}/bsdinstall
Modified: head/usr.sbin/bsdinstall/scripts/auto
==============================================================================
--- head/usr.sbin/bsdinstall/scripts/auto Fri Jul 15 13:25:47 2016
(r302896)
+++ head/usr.sbin/bsdinstall/scripts/auto Fri Jul 15 15:07:24 2016
(r302897)
@@ -385,6 +385,7 @@ if [ "$NETCONFIG_DONE" != yes ]; then
fi
bsdinstall time
bsdinstall services
+bsdinstall hardening
dialog --backtitle "FreeBSD Installer" --title "Add User Accounts" --yesno \
"Would you like to add users to the installed system now?" 0 0 && \
@@ -401,6 +402,7 @@ finalconfig() {
"Hostname" "Set system hostname" \
"Network" "Networking configuration" \
"Services" "Set daemons to run on startup" \
+ "System Hardening" "Set security options" \
"Time Zone" "Set system timezone" \
"Handbook" "Install FreeBSD Handbook (requires network)" 2>&1
1>&3)
exec 3>&-
@@ -426,6 +428,10 @@ finalconfig() {
bsdinstall services
finalconfig
;;
+ "System Hardening")
+ bsdinstall hardening
+ finalconfig
+ ;;
"Time Zone")
bsdinstall time
finalconfig
Modified: head/usr.sbin/bsdinstall/scripts/config
==============================================================================
--- head/usr.sbin/bsdinstall/scripts/config Fri Jul 15 13:25:47 2016
(r302896)
+++ head/usr.sbin/bsdinstall/scripts/config Fri Jul 15 15:07:24 2016
(r302897)
@@ -32,6 +32,9 @@
cat $BSDINSTALL_TMPETC/rc.conf.* >> $BSDINSTALL_TMPETC/rc.conf
rm $BSDINSTALL_TMPETC/rc.conf.*
+cat $BSDINSTALL_CHROOT/etc/sysctl.conf
$BSDINSTALL_TMPETC/sysctl.conf.hardening >> $BSDINSTALL_TMPETC/sysctl.conf
+rm $BSDINSTALL_TMPETC/sysctl.conf.*
+
cp $BSDINSTALL_TMPETC/* $BSDINSTALL_CHROOT/etc
cat $BSDINSTALL_TMPBOOT/loader.conf.* >> $BSDINSTALL_TMPBOOT/loader.conf
Added: head/usr.sbin/bsdinstall/scripts/hardening
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/usr.sbin/bsdinstall/scripts/hardening Fri Jul 15 15:07:24 2016
(r302897)
@@ -0,0 +1,79 @@
+#!/bin/sh
+#-
+# Copyright (c) 2016 Bartek Rutkowski
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+
+: ${DIALOG_OK=0}
+
+echo -n > $BSDINSTALL_TMPETC/rc.conf.services
+
+exec 3>&1
+FEATURES=$( dialog --backtitle "FreeBSD Installer" \
+ --title "System Hardening" --nocancel --notags --separate-output \
+ --checklist "Choose system security hardening options:" \
+ 0 0 0 \
+ "hide_uids" "Hide processes running as other users" ${hide_uids:-off} \
+ "hide_gids" "Hide processes running as other groups" ${hide_gids:-off} \
+ "read_msgbuf" "Disable reading kernel message buffer for unprivileged
users" ${read_msgbuf:-off} \
+ "proc_debug" "Disable process debugging facilities for unprivileged
users" ${proc_debug:-off} \
+ "random_pid" "Randomize the PID of newly created processes"
${random_id:-off} \
+ "stack_guard" "Insert stack guard page ahead of the growable segments"
${stack_guard:-off} \
+ "clear_tmp" "Clean the /tmp filesystem on system startup"
${clear_tmp:-off} \
+ "disable_syslogd" "Disable opening Syslogd network socket (disables
remote logging)" ${disable_syslogd:-off} \
+ "disable_sendmail" "Disable Sendmail service" ${disable_sendmail:-off} \
+2>&1 1>&3 )
+exec 3>&-
+
+for feature in $FEATURES; do
+ if [ "$feature" = "hide_uids" ]; then
+ echo security.bsd.see_other_uids=0 >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "hide_gids" ]; then
+ echo security.bsd.see_other_gids=0 >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "read_msgbuf" ]; then
+ echo security.bsd.unprivileged_read_msgbuf=0 >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "proc_debug" ]; then
+ echo security.bsd.unprivileged_proc_debug=0 >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "random_id" ]; then
+ echo kern.randompid=$(jot -r 1 9999) >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "stack_guard" ]; then
+ echo security.bsd.stack_guard_page=1 >>
$BSDINSTALL_TMPETC/sysctl.conf.hardening
+ fi
+ if [ "$feature" = "clear_tmp" ]; then
+ echo 'clear_tmp_enable="YES"' >>
$BSDINSTALL_TMPETC/rc.conf.hardening
+ fi
+ if [ "$feature" = "disable_syslogd" ]; then
+ echo 'syslogd_flags="-ss"' >>
$BSDINSTALL_TMPETC/rc.conf.hardening
+ fi
+ if [ "$feature" = "disable_sendmail" ]; then
+ echo 'sendmail_enable="NONE"' >>
$BSDINSTALL_TMPETC/rc.conf.hardening
+ fi
+done
+
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