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|
#!/bin/bash
LCK=/var/run/msec-security.pid
function cleanup() {
rm -f $LCK
}
if [ -f $LCK ]; then
if [ -d /proc/`cat $LCK` ]; then
exit 0
else
rm -f $LCK
fi
fi
echo -n $$ > $LCK
trap cleanup 0
if [[ ! -f /var/lib/msec/security.conf ]]; then
echo "Can't access /var/lib/msec/security.conf."
exit 1
fi
. /var/lib/msec/security.conf
if [ -r /etc/security/msec/security.conf ]; then
. /etc/security/msec/security.conf
fi
if [ -r /etc/sysconfig/msec ]; then
. /etc/sysconfig/msec
fi
umask ${UMASK_ROOT=077}
[[ ${MAIL_WARN} == yes ]] && [ -z ${MAIL_USER} ] && MAIL_USER="root"
export SUID_ROOT_TODAY="/var/log/security/suid_root.today"
SUID_ROOT_YESTERDAY="/var/log/security/suid_root.yesterday"
SUID_ROOT_DIFF="/var/log/security/suid_root.diff"
export SGID_TODAY="/var/log/security/sgid.today"
SGID_YESTERDAY="/var/log/security/sgid.yesterday"
SGID_DIFF="/var/log/security/sgid.diff"
export SUID_MD5_TODAY="/var/log/security/suid_md5.today"
SUID_MD5_YESTERDAY="/var/log/security/suid_md5.yesterday"
SUID_MD5_DIFF="/var/log/security/suid_md5.diff"
export OPEN_PORT_TODAY="/var/log/security/open_port.today"
OPEN_PORT_YESTERDAY="/var/log/security/open_port.yesterday"
OPEN_PORT_DIFF="/var/log/security/open_port.diff"
export WRITABLE_TODAY="/var/log/security/writable.today"
WRITABLE_YESTERDAY="/var/log/security/writable.yesterday"
WRITABLE_DIFF="/var/log/security/writable.diff"
export UNOWNED_USER_TODAY="/var/log/security/unowned_user.today"
UNOWNED_USER_YESTERDAY="/var/log/security/unowned_user.yesterday"
UNOWNED_USER_DIFF="/var/log/security/unowned_user.diff"
export UNOWNED_GROUP_TODAY="/var/log/security/unowned_group.today"
UNOWNED_GROUP_YESTERDAY="/var/log/security/unowned_group.yesterday"
UNOWNED_GROUP_DIFF="/var/log/security/unowned_group.diff"
export RPM_VA_TODAY="/var/log/security/rpm-va.today"
RPM_VA_YESTERDAY="/var/log/security/rpm-va.yesterday"
RPM_VA_DIFF="/var/log/security/rpm-va.diff"
export RPM_VA_CONFIG_TODAY="/var/log/security/rpm-va-config.today"
RPM_VA_CONFIG_YESTERDAY="/var/log/security/rpm-va-config.yesterday"
RPM_VA_CONFIG_DIFF="/var/log/security/rpm-va-config.diff"
export RPM_QA_TODAY="/var/log/security/rpm-qa.today"
RPM_QA_YESTERDAY="/var/log/security/rpm-qa.yesterday"
RPM_QA_DIFF="/var/log/security/rpm-qa.diff"
export CHKROOTKIT_TODAY="/var/log/security/chkrootkit.today"
CHKROOTKIT_YESTERDAY="/var/log/security/chkrootkit.yesterday"
export EXCLUDE_REGEXP
# Modified filters coming from debian security scripts.
CS_NFSAFS='(nfs|afs|coda)'
CS_TYPES=' type (devpts|auto|proc|msdos|fat|vfat|iso9660|ncpfs|smbfs|hfs|'$CS_NFSAFS')'
CS_DEVS='^/dev/fd'
CS_DIRS='on /mnt'
FILTERS="$CS_TYPES|$CS_DEVS|$CS_DIRS"
DIR=`mount | grep -vE "$FILTERS" | cut -d ' ' -f3`
PRINT="%h/%f\n"
EXCLUDEDIR=`mount | grep -E "$FILTERS" | cut -d ' ' -f3`
export EXCLUDEDIR
if [[ ! -d /var/log/security ]]; then
mkdir /var/log/security
fi
if [[ -f ${SUID_ROOT_TODAY} ]]; then
mv ${SUID_ROOT_TODAY} ${SUID_ROOT_YESTERDAY};
fi
if [[ -f ${SGID_TODAY} ]]; then
mv ${SGID_TODAY} ${SGID_YESTERDAY};
fi
if [[ -f ${WRITABLE_TODAY} ]]; then
mv ${WRITABLE_TODAY} ${WRITABLE_YESTERDAY};
fi
if [[ -f ${UNOWNED_USER_TODAY} ]]; then
mv ${UNOWNED_USER_TODAY} ${UNOWNED_USER_YESTERDAY};
fi
if [[ -f ${UNOWNED_GROUP_TODAY} ]]; then
mv ${UNOWNED_GROUP_TODAY} ${UNOWNED_GROUP_YESTERDAY};
fi
if [[ -f ${OPEN_PORT_TODAY} ]]; then
mv -f ${OPEN_PORT_TODAY} ${OPEN_PORT_YESTERDAY}
fi
if [[ -f ${SUID_MD5_TODAY} ]]; then
mv ${SUID_MD5_TODAY} ${SUID_MD5_YESTERDAY};
fi
if [[ -f ${RPM_VA_TODAY} ]]; then
mv -f ${RPM_VA_TODAY} ${RPM_VA_YESTERDAY}
fi
if [[ -f ${RPM_VA_CONFIG_TODAY} ]]; then
mv -f ${RPM_VA_CONFIG_TODAY} ${RPM_VA_CONFIG_YESTERDAY}
fi
if [[ -f ${RPM_QA_TODAY} ]]; then
mv -f ${RPM_QA_TODAY} ${RPM_QA_YESTERDAY}
fi
if [[ -f ${CHKROOTKIT_TODAY} ]]; then
mv -f ${CHKROOTKIT_TODAY} ${CHKROOTKIT_YESTERDAY}
fi
netstat -pvlA inet 2> /dev/null > ${OPEN_PORT_TODAY};
# Hard disk related file check; the less priority the better...
nice --adjustment=+19 /usr/bin/msec_find ${DIR}
if [[ -f ${SUID_ROOT_TODAY} ]]; then
sort < ${SUID_ROOT_TODAY} > ${SUID_ROOT_TODAY}.tmp
mv -f ${SUID_ROOT_TODAY}.tmp ${SUID_ROOT_TODAY}
fi
if [[ -f ${SGID_TODAY} ]]; then
sort < ${SGID_TODAY} > ${SGID_TODAY}.tmp
mv -f ${SGID_TODAY}.tmp ${SGID_TODAY}
fi
if [[ -f ${WRITABLE_TODAY} ]]; then
sort < ${WRITABLE_TODAY} | egrep -v '^(/var)?/tmp$' > ${WRITABLE_TODAY}.tmp
mv -f ${WRITABLE_TODAY}.tmp ${WRITABLE_TODAY}
fi
if [[ -f ${UNOWNED_USER_TODAY} ]]; then
sort < ${UNOWNED_USER_TODAY} > ${UNOWNED_USER_TODAY}.tmp
mv -f ${UNOWNED_USER_TODAY}.tmp ${UNOWNED_USER_TODAY}
fi
if [[ -f ${UNOWNED_GROUP_TODAY} ]]; then
sort < ${UNOWNED_GROUP_TODAY} > ${UNOWNED_GROUP_TODAY}.tmp
mv -f ${UNOWNED_GROUP_TODAY}.tmp ${UNOWNED_GROUP_TODAY}
fi
if [[ -f ${SUID_ROOT_TODAY} ]]; then
while read line; do
md5sum ${line}
done < ${SUID_ROOT_TODAY} > ${SUID_MD5_TODAY}
fi
### rpm database check
if [[ ${RPM_CHECK} == yes ]]; then
rpm -qa --qf "%{NAME}-%{VERSION}-%{RELEASE}\t%{INSTALLTIME}\n" | sort > ${RPM_QA_TODAY}
rm -f ${RPM_VA_TODAY}.tmp
nice --adjustment=+19 rpm -V `cut -f 1 < ${RPM_QA_TODAY} | grep -v '^dev-[0-9]'` | grep '^..5' | sort > ${RPM_VA_TODAY}.tmp
grep -v '^.........c.' ${RPM_VA_TODAY}.tmp | sed 's/^...........//' | sort > ${RPM_VA_TODAY}
grep '^.........c.' ${RPM_VA_TODAY}.tmp | sed 's/^...........//' | sort > ${RPM_VA_CONFIG_TODAY}
rm -f ${RPM_VA_TODAY}.tmp
fi
### chkrootkit checks
if [[ ${CHKROOTKIT_CHECK} == yes ]]; then
if [ -x /usr/sbin/chkrootkit ]; then
/usr/sbin/chkrootkit > ${CHKROOTKIT_TODAY}
fi
fi
### Functions ###
Syslog() {
if [[ ${SYSLOG_WARN} == yes ]]; then
while read line; do
/sbin/initlog --string="${line}"
done < ${1}
fi
}
Ttylog() {
if [[ ${TTY_WARN} == yes ]]; then
for i in `w | grep -v "load\|TTY" | grep '^root' | awk '{print $2}'` ; do
cat ${1} > /dev/$i
done
fi
}
Maillog() {
subject=${1}
text=${2}
SOMETHING_TO_SEND=
if [[ ${MAIL_WARN} == yes ]]; then
if [[ -z ${MAIL_USER} ]]; then
MAIL_USER="root"
fi
if [[ -x /bin/mail ]]; then
for f in ${text}; do
if [[ -s $f ]]; then
SOMETHING_TO_SEND=1
break
fi
done
if [[ -z ${SOMETHING_TO_SEND} ]]; then
if [[ ${MAIL_EMPTY_CONTENT} != no ]]; then
/bin/mail -s "${subject}" "${MAIL_USER}" <<EOF
Nothing has changed since the last run.
EOF
fi
else
cat ${text} | /bin/mail -s "${subject}" "${MAIL_USER}"
fi
fi
fi
}
##################
. /usr/share/msec/diff_check.sh
. /usr/share/msec/security_check.sh
|
