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#!/bin/bash
# msec: rootkit security check
# check if we are run from main script
if [ -z "$MSEC_TMP" -o -z "$INFOS" -o -z "$SECURITY" -o -z "$DIFF" -o -z "$SECURITY_LOG" ]; then
# variables are set in security.sh and propagated to the subscripts
echo "Error: this check should be run by the main msec security check!"
echo " do not run it directly unless you know what you are doing."
return 1
fi
export CHKROOTKIT_TODAY="/var/log/security/chkrootkit.today"
CHKROOTKIT_YESTERDAY="/var/log/security/chkrootkit.yesterday"
CHKROOTKIT_DIFF="/var/log/security/chkrootkit.diff"
### chkrootkit checks
if [[ ${CHECK_CHKROOTKIT} == yes ]]; then
if [ -x /usr/sbin/chkrootkit ]; then
# do not check on NFS
/usr/sbin/chkrootkit -n ${CHKROOTKIT_OPTION} > ${CHKROOTKIT_TODAY}
fi
fi
### chkrootkit checks
if [[ ${CHECK_CHKROOTKIT} == yes ]]; then
if [[ -s ${CHKROOTKIT_TODAY} ]]; then
printf "\nChkrootkit report:\n" >> ${SECURITY}
cat ${CHKROOTKIT_TODAY} >> ${SECURITY}
fi
fi
### Changed chkrootkit
if [[ ${CHECK_CHKROOTKIT} == yes ]]; then
if [[ -f ${CHKROOTKIT_YESTERDAY} ]]; then
diff -u ${CHKROOTKIT_YESTERDAY} ${CHKROOTKIT_TODAY} 1> ${CHKROOTKIT_DIFF}
if [ -s ${CHKROOTKIT_DIFF} ]; then
printf "\nSecurity Warning: There are modifications for chkrootkit results :\n" >> ${DIFF}
grep '^+' ${CHKROOTKIT_DIFF} | grep -vw "^+++ " | sed 's|^.||'|sed -e 's/%/%%/g' | while read file; do
printf "\t\t- Added : ${file}\n"
done >> ${DIFF}
grep '^-' ${CHKROOTKIT_DIFF} | grep -vw "^--- " | sed 's|^.||'|sed -e 's/%/%%/g' | while read file; do
printf "\t\t- Removed : ${file}\n"
done >> ${DIFF}
fi
fi
fi
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