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|
#!/bin/bash
# msec: shared function
. /etc/sysconfig/i18n
if [[ -f /etc/profile.d/10lang.sh ]]; then
. /etc/profile.d/10lang.sh
fi
if [[ -f /etc/security/msec/security.conf ]]; then
. /etc/security/msec/security.conf
else
echo "/etc/security/msec/security.conf don't exist."
exit 1
fi
if [ -r /etc/security/shell ]; then
. /etc/security/shell
fi
umask ${UMASK_ROOT=077}
# main security log
SECURITY_LOG="/var/log/security.log"
# Modified filters coming from debian security scripts.
# rootfs is not listed among excluded types, because
# / is mounted twice, and filtering it would mess with excluded dir list
TYPE_FILTER='(devpts|sysfs|usbfs|tmpfs|binfmt_misc|rpc_pipefs|securityfs|auto|proc|msdos|fat|vfat|iso9660|ncpfs|smbfs|hfs|nfs|afs|coda|cifs|fuse.gvfs-fuse-daemon|vmblock)'
MOUNTPOINT_FILTER='^\/mnt|^\/media'
DIR=`awk '$3 !~ /'$TYPE_FILTER'/ && $2 !~ /'$MOUNTPOINT_FILTER'/ \
{print $2}' /proc/mounts | uniq`
PRINT="%h/%f\n"
EXCLUDEDIR=`awk '$3 ~ /'$TYPE_FILTER'/ || $2 ~ /'$MOUNTPOINT_FILTER'/ \
{print $2}' /proc/mounts | uniq`
export EXCLUDEDIR
FILTER="\(`echo $EXCLUDEDIR | sed -e 's/ /\\\|/g'`\)"
### Functions ###
function current_check_type() {
# determines current check type by matching the directory from where
# the main script is executed against possible check values. Currently,
# the following checks are supported: daily, weekly, monthly
# if nothing matches those directories, it is assumed that the check is "manual"
SCRIPT_DIR=$(dirname $0)
for check in daily weekly monthly; do
echo $SCRIPT_DIR | grep -q $check
ret=$?
if [ $ret = "0" ]; then
echo $check
return
fi
done
# nothing matches, so assuming a manual check
echo "manual"
return
}
function check_is_enabled() {
# checks if a periodic check should run by matching the directory from where
# the main script is run against check value. E.g., daily checks will work if
# executed from /etc/cron.daily or any directory containing 'daily'; weekly checks
# will run if run withing a directory containing 'weekly', and so on
check=$1
current_check=$(current_check_type)
if [ "$check" = "$current_check" ]; then
return 0
fi
# is the check being run manually (e.g., it is not a crontab symlink?)
# NOTE: this only checks if the file is a symlink, assuming that the manual check
# is performed by running the /usr/share/msec/security.sh directly
if [ "$check" = "manual" -a ! -L $0 ]; then
return 0
fi
return 1
}
Diffcheck() {
TODAY="$1"
YESTERDAY="$2"
DAY_DIFF="$3"
MESSAGE="$4"
# give the proper permission to files
msecperms -q -e "$TODAY" "$YESTERDAY"
if [[ -f ${YESTERDAY} ]]; then
if ! diff -u ${YESTERDAY} ${TODAY} > ${DAY_DIFF}; then
printf "\nSecurity Warning: change in $MESSAGE found :\n" >> ${DIFF}
grep '^+' ${DAY_DIFF} | grep -vw "^+++ " | sed 's|^.||'|sed -e 's/%/%%/g' | while read file; do
printf "\t\t- Added $MESSAGE : ${file}\n"
done >> ${DIFF}
grep '^-' ${DAY_DIFF} | grep -vw "^--- " | sed 's|^.||'|sed -e 's/%/%%/g' | while read file; do
printf "\t\t- Removed $MESSAGE : ${file}\n"
done >> ${DIFF}
fi
msecperms -q -e "$DAY_DIFF"
fi
}
Count() {
# counts number of entries in a file
LOG="$1"
FILE="$2"
MESSAGE="$3"
NUM_ENTRIES=$(wc -l 2>/dev/null < $FILE)
echo "$MESSAGE: $NUM_ENTRIES" >> $LOG
}
Filter() {
# filters output according to defined rules
FILE="$1"
RULE="$2"
exceptions=/etc/security/msec/exceptions
if [ ! -f "$FILE" ]; then
# file not found - probably test was not run
return
fi
if [ ! -s "$exceptions" -o "a$RULE" = "a" ]; then
FILTER="cat"
else
# get the rules
EXCEPTIONS=""
for except in $(cat $exceptions | sed -e "/^\($RULE\|\*\) /!d; s/^\($RULE\|\*\) \(.*\)/\2/g"); do
exc=${except//\//\\\/}
EXCEPTIONS="$EXCEPTIONS -e /${exc}/d"
done
if [ ! -n "$EXCEPTIONS" ]; then
FILTER="cat"
else
FILTER="sed $EXCEPTIONS"
fi
fi
$FILTER < $FILE > ${FILE}.tmp
mv -f ${FILE}.tmp $FILE
}
Syslog() {
if [[ ${SYSLOG_WARN} == yes ]]; then
cat ${1} | while read line; do
logger -t msec -- "${line}"
done
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
# define a mail user
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
# remove non-printable characters,
# see http://qa.mandriva.com/show_bug.cgi?id=36848 and https://qa.mandriva.com/show_bug.cgi?id=26773
cat ${text} | sed -e "s,[[:cntrl:]],,g" | LC_CTYPE=$LC_CTYPE /bin/mail -s "${subject}" "${MAIL_USER}"
fi
fi
fi
}
Notifylog() {
if [[ ${NOTIFY_WARN} == yes ]]; then
message=${1}
DBUS_SEND=`which dbus-send 2>/dev/null`
if [ -x "$DBUS_SEND" ]; then
$DBUS_SEND --system --type=signal /com/mandriva/user com.mandriva.user.security_notification string:"$message"
fi
fi
}
##################
|
