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Add periodic script to check vulnerabilities in base system
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| #!/bin/sh -f | ||
| # | ||
| # Copyright (c) 2004 Oliver Eikemeier. All rights reserved. | ||
| # Copyright (c) 2014 Matthew Seaman <[email protected]> | ||
| # Copyright (c) 2016 Miroslav Lachman <[email protected]> | ||
| # | ||
| # 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_jails_ignore+=""} | ||
| : ${security_status_baseaudit_expiry:=2} | ||
|
|
||
| security_daily_compat_var security_status_baseaudit_enable | ||
| security_daily_compat_var security_status_baseaudit_quiet | ||
| security_daily_compat_var security_status_baseaudit_chroots | ||
| security_daily_compat_var security_status_baseaudit_jails | ||
| security_daily_compat_var security_status_baseaudit_expiry | ||
|
|
||
| # Compute PKG_DBDIR from the config file. | ||
| pkgcmd=%prefix%/sbin/pkg | ||
| PKG_DBDIR=`${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 | ||
| } | ||
|
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||
| # 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 | ||
| # ignore some jails | ||
| # we iterate to get exact matches because we want substring matches | ||
| # foo should not match foo.bar | ||
| for ignore in ${security_status_baseaudit_jails_ignore} ; do | ||
| if [ "${j%|*}" = "${ignore}" ]; then | ||
| echo | ||
| echo "ignoring jail: ${j%|*}" | ||
| # continue with the main loop | ||
| continue 2 | ||
| fi | ||
| done | ||
| echo | ||
| echo "jail: ${j%|*}" | ||
| audit_base "-j ${j%|*}" ${j##*|} | ||
| last_rc=$? | ||
| [ $last_rc -gt 1 ] && rc=$last_rc | ||
| done | ||
|
|
||
| return $rc | ||
| } | ||
|
|
||
| rc=0 | ||
|
|
||
| if check_yesno_period security_status_baseaudit_enable | ||
| then | ||
| echo | ||
| echo 'Checking for security vulnerabilities in base (userland & kernel):' | ||
|
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||
| 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 | ||
|
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||
| audit_base_all ; rc=$? | ||
| fi | ||
| fi | ||
|
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| exit "$rc" |