FreeBSD/Jails and portaudit

Jails are a useful tool for servers but can present an additional layer of administration. In an attempt to decrease this cost, I thought it would be good to workout a way to use portaudit on each jail. I found a script to do it http://www.section6.net/wiki/index.php/Creating_a_FreeBSD_Jail but was unhappy with it and have modified the procedure somewhat.

Scripting

I placed this script in /usr/local/etc/periodic/security/420.jailportaudit . It requires portaudit be installed and is based on both the aforementioned script and 410.portaudit.

#!/bin/sh -f
#
# Copyright (c) 2004 Oliver Eikemeier. 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.
#
# 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.
#

# If there is a global system configuration file, suck it in.
#
if [ -r /etc/defaults/periodic.conf ]; then
    . /etc/defaults/periodic.conf
    source_periodic_confs
fi

. /etc/rc.conf

rc=0
case "${daily_status_security_jailportaudit_enable:-YES}" in
        [Nn][Oo])
                ;;
        *)
                echo
                # taken from http://www.section6.net/wiki/index.php/Creating_a_FreeBSD_Jail
                # Now Lets create temp files of ports in the jails,
                # audit the root server all jails
                # and delete the temp files
                tmpdir=`mktemp -d /tmp/jailportaudit.XXXXXXXX`
                cd $tmpdir
                for jail in $jail_list; do
                        # taken from /etc/rc.d/jail
                        eval jaildir=\"\$jail_${jail}_rootdir\"

                        echo ""
                        echo "Checking for packages with security vulnerabilities in jail \"$jail\":"
                        echo ""
                        ls -1 $jaildir/var/db/pkg > $tmpdir/$jail.paf
                        /usr/local/sbin/portaudit -f $tmpdir/$jail.paf
                        rm $tmpdir/$jail.paf
                done
                ;;
esac

exit "$rc"