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#!/bin/sh
################################################################################
# #
# Copyright (C) 2008-2012 LABBE Corentin <corentin.labbe@geomatys.fr>
#
# YASAT is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# YASAT is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with YASAT. If not, see <http://www.gnu.org/licenses/>.
# #
################################################################################
# * The setuid bit adds 4 to the total,
# * The setgid bit adds 2 to the total
# * The sticky bit adds 1 to the total.
Title "Check system binaries and integrity tools"
#TODO check for AIDE and tripwire they better do this job than me
#TODO check for rkhunter
which aide 2>> $ERROR_OUTPUT_FILE >/dev/null
if [ $? -eq 1 ]
then
Display --indent 2 --text "AIDE file integrity tester" --result NOTFOUND --color ORANGE --advice BINARIES_NO_AIDE
else
Display --indent 2 --text "AIDE file integrity tester" --result FOUND --color GREEN
#TODO check good usage of AIDE like if aideinit was used or not
#AIDE installed is not sufficient
fi
which tripwire 2>> $ERROR_OUTPUT_FILE >/dev/null
if [ $? -eq 1 ] ;then
Display --indent 2 --text "TRIPWIRE file integrity tester" --result NOTFOUND --color ORANGE --advice BINARIES_NO_TRIPWIRE
else
Display --indent 2 --text "TRIPWIRE file integrity tester" --result FOUND --color GREEN
#TODO check good usage of TRIPWIRE
#TRIPWIRE installed is not sufficient
fi
which chkrootkit 2>> $ERROR_OUTPUT_FILE >/dev/null
if [ $? -eq 1 ]
then
Display --indent 2 --text "chkrootkit" --result NOTFOUND --color ORANGE --advice BINARIES_NO_CHKROOTKIT
else
Display --indent 2 --text "chkrootkit" --result FOUND --color GREEN
fi
BINARY_POSSIBLE_PATH='/sbin /bin /usr/sbin /usr/bin /usr/local/bin /usr/local/sbin /usr/local/usr/bin /usr/local/usr/sbin /lib /usr/lib /usr/libexec /usr/local/lib /lib64 /lib32 /usr/lib64'
echo "DEBUG This check is in development"
if [ "$SCANTYPE" = "FULL" ] ; then
Display --indent 2 --text "Full setuid-scan of filesystem" --result INFO --color BLUE
BINARY_POSSIBLE_PATH='/'
fi
HAVE_POSIX_CAPS_TOOLS=0
#POSIX CAPS only exists under Linux
if [ "$OS_TYPE" = 'Linux' ] ;then
which getcap 2>> $ERROR_OUTPUT_FILE >/dev/null
if [ $? -eq 0 ] ;then
Display --indent 2 --text "POSIX CAPS tools" --result FOUND --color GREEN
HAVE_POSIX_CAPS_TOOLS=1
fi
if [ $HAVE_POSIX_CAPS_TOOLS -eq 0 ] ; then
which filecap 2>> $ERROR_OUTPUT_FILE >/dev/null
if [ $? -eq 0 ] ;then
Display --indent 2 --text "libcap-ng tools" --result FOUND --color GREEN
HAVE_POSIX_CAPS_TOOLS=2
fi
fi
if [ $HAVE_POSIX_CAPS_TOOLS -eq 0 ] ; then
Display --indent 2 --text "POSIX CAPS tools" --result NOTFOUND --color ORANGE --advice BINARIES_NO_POSIXCAPSTOOLS
fi
fi
#TODO check whole filesystem for setuid ?
#TODO propose better rights
for BIN_PATH in $BINARY_POSSIBLE_PATH
do
if [ -e "$BIN_PATH" ] ;then
echo "Checking file with set UID in $BIN_PATH"
find $BIN_PATH -perm $FIND_SETUID -type f |
while read BIN_TO_TEST
do
RIGHT_ACTUAL="`stat $STAT_FULL_RIGHT $BIN_TO_TEST`"
OSTOTEST="${OS}"
if [ ! -z "$LINUX_VERSION" ] ;then
OSTOTEST="$LINUX_VERSION"
fi
if [ "$LINUX_VERSION" = 'Debian' ] ;then
OSTOTEST="$OS_NICKNAME"
fi
BIN_TO_TEST2="`echo $BIN_TO_TEST | sed 's/lib64\//lib\//'`"
RESULTAT=`grep -v '^#' $PLUGINS_REP/binaries.data | grep "$OSTOTEST" | grep "${BIN_TO_TEST2}|"`
if [ -z "$RESULTAT" ] ;then
Display --indent 2 --text "$BIN_TO_TEST with $RIGHT_ACTUAL" --result UNKNOWN --color RED --advice BINARIES_UNKNOWN
else
GOOD_RIGHT=`echo $RESULTAT | cut -d\| -f2`
if [ "$RIGHT_ACTUAL" = "$GOOD_RIGHT" ] ;then
Display --indent 2 --text "$BIN_TO_TEST with right=$RIGHT_ACTUAL" --result FOUND --color GREEN
else
Display --indent 2 --text "$BIN_TO_TEST with bad rights $RIGHT_ACTUAL != $GOOD_RIGHT" --result FOUND --color RED --advice BINARIES_BAD_RIGHT
fi
#a Set-UID binary must be owned by root
#TODO On Debian Lenny at is daemon:daemon
BINARY_FS_OWNER="`stat $STAT_USER $BIN_TO_TEST`"
if [ "$BINARY_FS_OWNER" != "root" ] ;then
Display --indent 2 --text "$BIN_TO_TEST is not owned by root on the FS" --result WARNING --color RED
fi
#MD5 for common archs (obsolete, aide/tripwire do that better than me)
# GOOD_MD5=`echo $RESULTAT | cut -d\| -f4`
# if [ ! -z "$GOOD_MD5" ]
# then
# MD5_ACTUAL="`md5sum $BIN_TO_TEST | cut -d\ -f1`"
# if [ "$MD5_ACTUAL" != "$GOOD_MD5" ]
# then
# echo $MD5_ACTUAL $GOOD_MD5
# Display --indent 2 --text "$BIN_TO_TEST has incorrect MD5" --result WARNING --color RED
# fi
# fi
fi
#TODO some set-uid are not necessary like mount, netstat, ifconfig, traceroute, route and ping (and equivalent for ipv6 ping6 etc..)
if [ ! -z "`grep $BIN_TO_TEST ${PLUGINS_REP}/binaries.suid`" ] ; then
Display --indent 4 --text "You can remove PERHAPS setuid from $BIN_TO_TEST" --result WARNING --color BLUE --advice BINARIES_REMOVE_SETUID
fi
#TODO POSIX CAPS (check for XATTR)
#getcap /bin/ping6
#/bin/ping6 = cap_net_raw+ep
#filecap /bin/ping6
#file capabilities
#/bin/ping6 net_raw
if [ $HAVE_POSIX_CAPS_TOOLS -ge 1 ] ;then
BIN_TO_TEST_NAME="`basename $BIN_TO_TEST`"
POSIX_CAPS="`grep ^${BIN_TO_TEST_NAME}= ${PLUGINS_REP}/binaries.caps`"
if [ $HAVE_POSIX_CAPS_TOOLS -eq 1 ] ;then
ACTUAL_CAPS="`getcap $BIN_TO_TEST | sed 's/.*= //'`"
else
ACTUAL_CAPS="`filecap $BIN_TO_TEST | grep ^$BIN_TO_TEST | sed 's/.*[[:space:]]//g'`"
fi
if [ ! -z "$POSIX_CAPS" ] ; then
if [ -z "$ACTUAL_CAPS" ] ; then
ACTUAL_CAPS="no POSIX CAPS"
fi
Display --indent 4 --text "${BIN_TO_TEST_NAME} can use POSIX CAPS" --result INFO --color BLUE --advice BINARIES_CAN_HAVE_POSIX_CAPS
Display --indent 4 --text "${BIN_TO_TEST_NAME} actual POSIX CAPS" --result "$ACTUAL_CAPS" --color BLUE
Display --indent 4 --text "${BIN_TO_TEST_NAME} need POSIX CAPS $POSIX_CAPS" --result INFO --color BLUE
add_correction "#setcap $POSIX_CAPS+ep $BIN_TO_TEST"
fi
fi
done
# else
# echo "DEBUG $BIN_PATH dont exists"
fi
done
#TODO store scan result for comparing later results
|
