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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Scheduled tasks
#
#################################################################################
#
InsertSection "Scheduled tasks"
#
#################################################################################
#
ATD_RUNNING=0
#
#################################################################################
#
# Test : SCHD-7704
# Description : Check crontab / cronjobs
Register --test-no SCHD-7704 --weight L --network NO --description "Check crontab/cronjobs"
if [ ${SKIPTEST} -eq 0 ]; then
FindCronJob()
{
sCRONJOBS=`egrep '^([0-9*])' $1 | tr '\t' ' ' | tr -s ' ' | tr ' ' ','`
}
if [ -f /etc/crontab ]; then
FindCronJob /etc/crontab
for I in ${sCRONJOBS}; do
logtext "Found cronjob (/etc/crontab): ${I}"
report "cronjob[]=${I}"
done
fi
CRON_DIRS="/etc/cron.d"
for I in ${CRON_DIRS}; do
logtext "Test: checking directory ${I}"
if [ -d ${I} ]; then
FileIsReadable ${I}
if [ ${CANREAD} -eq 1 ]; then
logtext "Result: found directory ${I}"
logtext "Test: searching files in ${I}"
FIND=`find ${I} -type f -print`
if [ "${FIND}" = "" ]; then
logtext "Result: no files found in ${I}"
else
logtext "Result: found one or more files in ${I}. Analyzing files.."
for J in ${FIND}; do
FindCronJob ${J}
for K in ${sCRONJOBS}; do
logtext "Result: Found cronjob (${I}): ${K}"
done
done
logtext "Result: done with analyzing files in ${I}"
fi
else
logtext "Result: can not read file or directory ${I}"
fi
else
logtext "Result: directory ${I} does not exist"
fi
done
CRON_DIRS="/etc/cron.hourly /etc/cron.daily /etc/cron.weekly /etc/cron.monthly"
for I in ${CRON_DIRS}; do
logtext "Test: checking directory ${I}"
if [ -d ${I} ]; then
logtext "Result: found directory ${I}"
logtext "Test: searching files in ${I}"
FIND=`find ${I} -type f -print | grep -v ".placeholder"`
if [ "${FIND}" = "" ]; then
logtext "Result: no files found in ${I}"
else
logtext "Result: found one or more files in ${I}. Analyzing files.."
for J in ${FIND}; do
logtext "Result: Found cronjob (${I}): ${J}"
report "cronjob[]=${J}"
done
logtext "Result: done with analyzing files in ${I}"
fi
else
logtext "Result: directory ${I} does not exist"
fi
done
# /var/spool/cron/* and /var/spool/cron/crontabs/*
# Search only in one tree, to avoid searching the tree twice
if [ -d /var/spool/cron/crontabs ]; then
FIND=`find /var/spool/cron/crontabs -type f -print`
for I in ${FIND}; do
FindCronJob ${I}
for J in ${sCRONJOBS}; do
logtext "Found cronjob (/var/spool/cron/crontabs): ${I} (${J})"
report "cronjob[]=${I}"
done
done
else
if [ -d /var/spool/cron ]; then
FIND=`find /var/spool/cron -type f -print`
for I in ${FIND}; do
FindCronJob ${I}
for J in ${sCRONJOBS}; do
logtext "Found cronjob (/var/spool/cron): ${I} (${J})"
logtext "cronjob[]=${I}"
done
done
fi
fi
# Anacron
if [ "${OS}" = "Linux" ]; then
if [ -f /etc/anacrontab ]; then
logtext "Test: checking anacrontab"
sANACRONJOBS=`egrep '^([0-9@])' /etc/anacrontab | tr '\t' ' ' | tr -s ' ' | tr ' ' ','`
for J in ${sANACRONJOBS}; do
logtext "Found anacron job (/etc/anacrontab): ${J}"
report "cronjob[]=${J}"
done
fi
fi
Display --indent 2 --text "- Checking crontab/cronjob" --result DONE --color GREEN
fi
#
#################################################################################
#
# Test : SCHD-7718
# Description : Check atd status
Register --test-no SCHD-7718 --weight L --network NO --description "Check at users"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking atd status"
FIND=`${PSBINARY} ax | grep "/atd" | grep -v "grep"`
if [ ! "${FIND}" = "" ]; then
logtext "Result: at daemon active"
Display --indent 2 --text "- Checking atd status" --result RUNNING --color GREEN
ATD_RUNNING=1
else
logtext "Result: at daemon not active"
Display --indent 2 --text "- Checking atd status" --result "NOT RUNNING" --color WHITE
fi
fi
#
#################################################################################
#
# Test : SCHD-7720
# Description : Check at users
# Notes : if at.allow exists, only users listed can schedule at jobs
# if at.allow does not exist, but at.deny does, everyone
# except the listed ones can schedule jobs. If both can't be
# found, only root can schedule jobs.
if [ ${ATD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no SCHD-7720 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check at users"
if [ ${SKIPTEST} -eq 0 ]; then
AT_UNKNOWN=0
case ${OS} in
FreeBSD) AT_ALLOW="/var/at/at.allow"; AT_DENY="/var/at/at.deny" ;;
HPUX) AT_ALLOW="/usr/lib/cron/at.allow"; AT_DENY="/usr/lib/cron/at.deny" ;;
Linux) AT_ALLOW="/etc/at.allow"; AT_DENY="/etc/at.deny" ;;
OpenBSD) AT_ALLOW="/var/cron/at.allow"; AT_DENY="/var/cron/at.deny" ;;
SunOS) AT_ALLOW="/etc/cron.d/at.allow"; AT_DENY="/etc/cron.d/at.deny" ;;
*) AT_UNKNOWN=1; logtext "Test skipped, files for at unknown" ;;
esac
if [ ${AT_UNKNOWN} -eq 0 ]; then
logtext "Test: checking for file ${AT_ALLOW}"
if [ -f ${AT_ALLOW} ]; then
FileIsReadable ${AT_ALLOW}
if [ ${CANREAD} -eq 1 ]; then
logtext "Result: file ${AT_ALLOW} exists, only listed users can schedule at jobs"
FIND=`cat ${AT_ALLOW} | sort`
if [ "${FIND}" = "" ]; then
logtext "Result: File empty, no users are allowed to schedule at jobs"
else
for I in ${FIND}; do
logtext "Allowed at user: ${I}"
done
fi
else
logtext "Warning: can not read ${AT_ALLOW}"
fi
else
logtext "Result: file ${AT_ALLOW} does not exist"
logtext "Test: checking for file ${AT_DENY}"
if [ -f ${AT_DENY} ]; then
if [ -f ${AT_ALLOW} ]; then
logtext "Result: file ${AT_DENY} exists, only non listed users can schedule at jobs"
FIND=`cat ${AT_DENY} | sort`
if [ "${FIND}" = "" ]; then
logtext "Result: file is empty, no users are denied access to schedule jobs"
else
for I in ${FIND}; do
logtext "Denied at user: ${I}"
done
fi
else
logtext "Warning: can not read ${AT_DENY}"
fi
else
logtext "Result: both ${AT_ALLOW} and ${AT_DENY} do not exist"
logtext "Note: only root can schedule at jobs"
fi
fi
Display --indent 4 --text "- Checking at users" --result DONE --color GREEN
else
Display --indent 4 --text "- Checking at users" --result SKIPPED --color YELLOW
fi
fi
#
#################################################################################
#
# Test : SCHD-7724
# Description : Check scheduled at jobs
if [ ${ATD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no SCHD-7724 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check at jobs"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Check scheduled at jobs"
FIND=`atq | grep -v "no files in queue" | ${AWKBINARY} '{gsub("\t"," ");print}' | sed 's/ /!space!/g'`
if [ ! "${FIND}" = "" ]; then
logtext "Result: found one or more jobs"
for I in ${FIND}; do
I=`echo ${I} | sed 's/!space!/ /g'`
logtext "Found at job: ${I}"
done
Display --indent 4 --text "- Checking at jobs" --result FOUND --color GREEN
else
logtext "Result: no pending at jobs"
Display --indent 4 --text "- Checking at jobs" --result NONE --color GREEN
fi
fi
#
#################################################################################
#
wait_for_keypress
#
#================================================================================
# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands
|
