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#!/bin/sh -f
#
# Copyright (c) 2004 Oliver Eikemeier. All rights reserved.
# Copyright (c) 2014 Matthew Seaman <matthew@FreeBSD.org>
# Copyright (c) 2016 Miroslav Lachman <000.fbsd@quip.cz>
#
# 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.
#
# 3. Neither the name of the author nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED "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
# COPYRIGHT OWNER 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.
#
# $FreeBSD$
#
if [ -r /etc/defaults/periodic.conf ]; then
. /etc/defaults/periodic.conf
source_periodic_confs
fi
: ${security_status_baseaudit_enable:=YES}
: ${security_status_baseaudit_period:=daily}
: ${security_status_baseaudit_quiet:=NO}
: ${security_status_baseaudit_chroots=$pkg_chroots}
: ${security_status_baseaudit_jails=$pkg_jails}
: ${security_status_baseaudit_expiry:=2}
# Compute PKG_DBDIR from the config file.
pkgcmd=%%PREFIX%%/sbin/pkg
PKG_DBDIR=`${pkgcmd} config PKG_DBDIR`
auditfile="${PKG_DBDIR}/vuln.xml"
audit_base() {
local pkgargs="$1"
local basedir="$2"
local rc
local then
local now
local usrlv
local krnlv
local strlen
local chrootv
local jailv
local jid
## get version from chroot
if [ -n "`echo "$pkgargs" | egrep '^-c'`" ]; then
if [ -x "$basedir/bin/freebsd-version" ]; then
chrootv=$($basedir/bin/freebsd-version -u)
## safety check - strlen
strlen=$(echo "$chrootv" | wc -c)
if [ $strlen -gt 17 -o $strlen -lt 11 ]; then
echo "Wrong version string, cannot run audit"
return 3
fi
usrlv=$(echo $chrootv | sed 's,^,FreeBSD-,;s,-RELEASE-p,_,;s,-RELEASE$,,')
else
echo "Cannot guess chroot version"
return 3
fi
## get version from jail
elif [ -n "`echo "$pkgargs" | egrep '^-j'`" ]; then
jid=$(echo "$pkgargs" | awk '$1 ~ /^-[j]/ { print $2 }')
jailv=$(jexec $jid freebsd-version -u)
## safety check - strlen
strlen=$(echo "$jailv" | wc -c)
if [ $strlen -gt 17 -o $strlen -lt 11 ]; then
echo "Wrong version string, cannot run audit"
return 3
fi
usrlv=$(echo $jailv | sed 's,^,FreeBSD-,;s,-RELEASE-p,_,;s,-RELEASE$,,')
## get version from host
else
usrlv=$(freebsd-version -u | sed 's,^,FreeBSD-,;s,-RELEASE-p,_,;s,-RELEASE$,,')
fi
then=`stat -f '%m' "${basedir}${auditfile}" 2> /dev/null` || rc=3
now=`date +%s` || rc=3
## Add 10 minutes of padding since the check is in seconds.
if [ $rc -ne 0 -o \
$(( 86400 \* "${security_status_baseaudit_expiry}" )) \
-le $(( ${now} - ${then} + 600 )) ]; then
## When non-interactive, sleep to reduce congestion on mirrors
anticongestion
f="-F"
else
echo -n 'Database fetched: '
date -r "${then}" || rc=3
fi
## cannot check kernel in jail or chroot
if [ -z "`echo "$pkgargs" | egrep '^-[cj]'`" -a `sysctl -n security.jail.jailed` = 0 ]; then
krnlv=$(freebsd-version -k | sed 's,^,FreeBSD-kernel-,;s,-RELEASE-p,_,;s,-RELEASE$,,')
${pkgcmd} audit $f $q $krnlv || { rc=$?; [ $rc -lt 3 ] && rc=3; }
fi
${pkgcmd} audit $f $q $usrlv || { rc=$?; [ $rc -lt 3 ] && rc=3; }
return $rc
}
# Use $pkg_chroots to provide a default list of chroots, and
# $pkg_jails to provide a default list of jails (or '*' for all jails)
# for all pkg periodic scripts, or set
# $security_status_baseaudit_chroots and
# $security_status_baseaudit_jails for this script only.
audit_base_all() {
local rc
local last_rc
local jails
# We always show audit results for the base system, but only print
# a banner line if we're also showing audit results for any
# chroots or jails.
if [ -n "${security_status_baseaudit_chroots}" -o \
-n "${security_status_baseaudit_jails}" ]; then
echo "Host system:"
fi
audit_base '' ''
last_rc=$?
[ $last_rc -gt 1 ] && rc=$last_rc
for c in $security_status_baseaudit_chroots ; do
echo
echo "chroot: $c"
audit_base "-c $c" $c
last_rc=$?
[ $last_rc -gt 1 ] && rc=$last_rc
done
case $security_status_baseaudit_jails in
\*)
jails=$(jls -q -h name path | sed -e 1d -e 's/ /|/')
;;
'')
jails=
;;
*)
# Given the jail name or jid, find the jail path
jails=
for j in $security_status_baseaudit_jails ; do
p=$(jls -j $j -h name path | sed -e 1d -e 's/ /|/')
jails="${jails} ${p}"
done
;;
esac
for j in $jails ; do
echo
echo "jail: ${j%|*}"
audit_base "-j ${j%|*}" ${j##*|}
last_rc=$?
[ $last_rc -gt 1 ] && rc=$last_rc
done
return $rc
}
security_daily_compat_var security_status_baseaudit_enable
security_daily_compat_var security_status_baseaudit_quiet
security_daily_compat_var security_status_baseaudit_chroots
security_daily_compat_var security_status_baseaudit_jails
security_daily_compat_var security_status_baseaudit_exipiry
rc=0
if check_yesno_period security_status_baseaudit_enable
then
echo
echo 'Checking for security vulnerabilities in base (userland & kernel):'
if ! ${pkgcmd} -N >/dev/null 2>&1 ; then
echo 'pkg-audit is enabled but pkg is not used'
rc=2
else
case "${security_status_baseaudit_quiet}" in
[Yy][Ee][Ss])
q='-q'
;;
*)
q=
;;
esac
audit_base_all ; rc=$?
fi
fi
exit "$rc"
|
