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|
#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2015, Michael Boelen, CISOfy (michael.boelen@cisofy.com)
# Web site: https://cisofy.com
#
# 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.
#
#################################################################################
#
# Logging and related files
#
#################################################################################
#
LOG_FILES_LOCS="/var/log /var/adm"
LOGROTATE_CONFIG_FOUND=0
LOGROTATE_TOOL=""
METALOG_RUNNING=0
RFC3195D_RUNNING=0
RSYSLOG_RUNNING=0
SOLARIS_LOGHOST_FOUND=0
SYSLOG_DAEMON_PRESENT=0
SYSLOG_DAEMON_RUNNING=0
SYSLOG_NG_RUNNING=0
SYSTEMD_JOURNAL_RUNNING=0
#
#################################################################################
#
InsertSection "Logging and files"
# Test : LOGG-2130
# Description : Check for a running syslog daemon
Register --test-no LOGG-2130 --weight L --network NO --description "Check for running syslog daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for a logging daemon"
FIND=`${PSBINARY} ax | egrep "syslogd|syslog-ng|metalog|systemd-journal" | grep -v "grep"`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking for a running log daemon" --result WARNING --color RED
logtext "Result: Could not find a syslog daemon like syslog, syslog-ng, rsyslog, metalog, systemd-journal"
ReportSuggestion ${TEST_NO} "Check if any syslog daemon is running and correctly configured."
ReportWarning ${TEST_NO} "H" "No syslog daemon found"
AddHP 0 3
else
Display --indent 2 --text "- Checking for a running log daemon" --result OK --color GREEN
logtext "Result: Found a logging daemon"
SYSLOG_DAEMON_PRESENT=1
SYSLOG_DAEMON_RUNNING=1
AddHP 3 3
fi
fi
#
#################################################################################
#
# Test : LOGG-2132
# Description : Check for a running syslog-ng daemon
Register --test-no LOGG-2132 --weight L --network NO --description "Check for running syslog-ng daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for syslog-ng daemon in process list"
IsRunning syslog-ng
if [ ${RUNNING} -eq 1 ]; then
logtext "Result: Found syslog-ng in process list"
Display --indent 4 --text "- Checking Syslog-NG status" --result FOUND --color GREEN
SYSLOG_DAEMON_PRESENT=1
SYSLOG_NG_RUNNING=1
else
logtext "Result: Syslog-ng NOT found in process list"
Display --indent 4 --text "- Checking Syslog-NG status" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : LOGG-2134
# Description : Check for Syslog-NG configuration file consistency
if [ ! "${SYSLOGNGBINARY}" = "" -a ${SYSLOG_NG_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2134 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking Syslog-NG configuration file consistency"
if [ ${SKIPTEST} -eq 0 ]; then
FIND=`${SYSLOGNGBINARY} -s; echo $?`
if [ "${FIND}" = "0" ]; then
logtext "Result: Syslog-NG configuration file seems to be consistent"
Display --indent 6 --text "- Checking Syslog-NG consistency" --result OK --color GREEN
else
logtext "Result: Syslog-NG configuration file seems NOT to be consistent"
Display --indent 6 --text "- Checking Syslog-NG consistency" --result WARNING --color RED
ReportWarning ${TEST_NO} "L" "Found one or more problems in Syslog-NG configuration file"
ReportSuggestion ${TEST_NO} "Check the Syslog-NG configuration file and/or run a manual consistency check with: syslog-ng -s"
fi
fi
#
#################################################################################
#
# Test : LOGG-2136
# Description : Check for a running systemd-journal daemon
Register --test-no LOGG-2136 --weight L --network NO --description "Check for running systemd journal daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for systemd journal daemon in process list"
IsRunning systemd-journal
if [ ${RUNNING} -eq 1 ]; then
Display --indent 4 --text "- Checking systemd journal status" --result FOUND --color GREEN
SYSTEMD_JOURNAL_RUNNING=1
else
Display --indent 4 --text "- Checking systemd journal status" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : LOGG-2210
# Description : Check for a running metalog daemon
Register --test-no LOGG-2210 --weight L --network NO --description "Check for running metalog daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for metalog daemon in process list"
IsRunning metalog
if [ ${RUNNING} -eq 1 ]; then
logtext "Result: Found metalog in process list"
Display --indent 4 --text "- Checking Metalog status" --result FOUND --color GREEN
SYSLOG_DAEMON_PRESENT=1
METALOG_RUNNING=1
else
logtext "Result: metalog NOT found in process list"
Display --indent 4 --text "- Checking Metalog status" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : LOGG-2230
# Description : Check for a running rsyslog daemon
Register --test-no LOGG-2230 --weight L --network NO --description "Check for running RSyslog daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for RSyslog daemon in process list"
IsRunning rsyslogd
if [ ${RUNNING} -eq 1 ]; then
logtext "Result: Found rsyslogd in process list"
Display --indent 4 --text "- Checking RSyslog status" --result FOUND --color GREEN
SYSLOG_DAEMON_PRESENT=1
RSYSLOG_RUNNING=1
else
logtext "Result: rsyslogd NOT found in process list"
Display --indent 4 --text "- Checking RSyslog status" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : LOGG-2240
# Description : Check for a running RFC 3195 compliant daemon (syslog via TCP)
Register --test-no LOGG-2240 --weight L --network NO --description "Check for running RFC 3195 compliant daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching for RFC 3195 daemon (alias syslog reliable) in process list"
IsRunning rfc3195d
if [ ${RUNNING} -eq 1 ]; then
logtext "Result: Found rfc3195d in process list"
Display --indent 4 --text "- Checking RFC 3195 daemon status" --result FOUND --color GREEN
SYSLOG_DAEMON_PRESENT=1
RFC3195D_RUNNING=1
else
logtext "Result: rfc3195d NOT found in process list"
Display --indent 4 --text "- Checking RFC 3195 daemon status" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : LOGG-2138
# Description : Check for kernel log daemon (klogd) presence on Linux systems
# Notes : * When using rsyslog or systemd (systemd-journal), this process is not needed.
# * In combination with syslog-ng, klogd is still an addition to it, since it
# captures kernel related events and send them to syslog-ng.
# * This test should be below all other logging daemons
Register --test-no LOGG-2138 --os Linux --weight L --network NO --description "Checking kernel logger daemon on Linux"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching kernel logger daemon (klogd)"
if [ ${RSYSLOG_RUNNING} -eq 0 -a ${SYSTEMD_JOURNAL_RUNNING} -eq 0 ]; then
# Search for klogd, but ignore other lines related to klogd (like dd with input/output file)
#FIND=`${PSBINARY} ax | grep "klogd" | grep -v "dd" | grep -v "grep"`
IsRunning klogd
if [ ${RUNNING} -eq 1 ]; then
logtext "Result: klogd running"
Display --indent 4 --text "- Checking klogd" --result FOUND --color GREEN
else
logtext "Result: No klogd found"
Display --indent 4 --text "- Checking klogd" --result "NOT FOUND" --color RED
ReportWarning ${TEST_NO} "L" "klogd is not running, which could lead to missing kernel messages in log files"
fi
else
logtext "Result: test skipped, because other facility is being used to log kernel messages"
fi
fi
#
#################################################################################
#
# Test : LOGG-2142
# Description : Check for minilogd presence on Linux systems
Register --test-no LOGG-2142 --os Linux --weight L --network NO --description "Checking minilog daemon"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Result: Checking for unkilled minilogd instances"
# Search for minilogd. It shouldn't be running normally, if another syslog daemon is started
IsRunning minilogd
if [ ${RUNNING} -eq 0 ]; then
Display --indent 4 --text "- Checking minilogd instances" --result "NOT FOUND" --color WHITE
logtext "Result: No minilogd is running"
else
Display --indent 4 --text "- Checking minilogd instances" --result WARNING --color RED
logtext "Result: minilogd found in process list"
# minilogd daemon seems to be running
ReportWarning ${TEST_NO} "L" "minilogd is running, which should normally not be running"
fi
fi
#
#################################################################################
#
# Test : LOGG-2146
# Description : Check for logrotate (/etc/logrotate.conf and logrotate.d)
Register --test-no LOGG-2146 --weight L --os Linux --network NO --description "Checking logrotate.conf and logrotate.d"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking for /etc/logrotate.conf"
if [ -f /etc/logrotate.conf ]; then
LOGROTATE_CONFIG_FOUND=1
LOGROTATE_TOOL="logrotate"
logtext "Result: /etc/logrotate.conf found (file)"
else
logtext "Result: /etc/logrotate.conf NOT found"
fi
logtext "Test: Checking for /etc/logrotate.d (directory)"
if [ -d /etc/logrotate.d ]; then
LOGROTATE_CONFIG_FOUND=1
LOGROTATE_TOOL="logrotate"
logtext "Result: /etc/logrotate.d found"
else
logtext "Result: /etc/logrotate.conf found"
fi
if [ ${LOGROTATE_CONFIG_FOUND} -eq 1 ]; then
Display --indent 2 --text "- Checking logrotate presence" --result OK --color GREEN
logtext "Result: logrotate configuration found"
else
Display --indent 2 --text "- Checking logrotate presence" --result WARNING --color RED
logtext "Result: No logrotate configuration found"
ReportSuggestion ${TEST_NO} "Check if files are properly rotated by a some tool instead of logrotate"
fi
fi
#
#################################################################################
#
# Test : LOGG-2148
# Description : Checking log files rotated with logrotate
if [ ! "${LOGROTATEBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2148 --weight L --preqs-met ${PREQS_MET} --network NO --description "Checking logrotated files"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking which files are rotated with logrotate and if they exist"
FIND=`${LOGROTATEBINARY} -d -v /etc/logrotate.conf 2>&1 | egrep "considering log|skipping" | grep -v '*' | sort | uniq | awk '{ if ($2!="log") { print "File:"$2":does_not_exist" } else { print "File:"$3":exists" } }'`
if [ "${FIND}" = "" ]; then
logtext "Result: nothing found"
else
logtext "Result: found one or more files which are rotated via logrotate"
for I in ${FIND}; do
logtext "Output: ${I}"
done
fi
fi
#
#################################################################################
#
# Test : LOGG-2150
# Description : Checking log directories rotated with logrotate
if [ ! "${LOGROTATEBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2150 --weight L --preqs-met ${PREQS_MET} --network NO --description "Checking directories in logrotate configuration"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking which directories can be found in logrotate configuration"
FIND=`${LOGROTATEBINARY} -d -v /etc/logrotate.conf 2>&1 | egrep "considering log|skipping" | grep -v '*' | sort | uniq | awk '{ if ($2=="log") { print $3 } }' | sed 's@/[^/]*$@@g' | sort | uniq`
if [ "${FIND}" = "" ]; then
logtext "Result: nothing found"
else
logtext "Result: found one or more directories (via logrotate configuration)"
for I in ${FIND}; do
if [ -d ${I} ]; then
logtext "Directory found: ${I}"
report "log_directory[]=${I}"
else
logtext "Directory could not be found: ${I}"
fi
done
fi
fi
#
#################################################################################
#
# Test : LOGG-2152
# Description : Check for Solaris 'loghost' entry in /etc/inet/hosts, or
# succesful resolving via DNS or any other name service.
Register --test-no LOGG-2152 --weight L --os Solaris --network NO --description "Checking loghost"
if [ ${SKIPTEST} -eq 0 ]; then
# Try local hosts file
logtext "Result: Checking for loghost in /etc/inet/hosts"
FIND=`grep loghost /etc/inet/hosts | grep -v "^#"`
if [ ! "${FIND}" = "" ]; then
SOLARIS_LOGHOST_FOUND=1
logtext "Result: Found loghost entry in /etc/inet/hosts"
else
logtext "Result: No loghost entry found in /etc/inet/hosts"
# Try name resolving if no entry is present in local host file
logtext "Result: Checking for loghost via name resolving"
FIND=`getent hosts loghost | grep loghost`
if [ ! "${FIND}" = "" ]; then
SOLARIS_LOGHOST_FOUND=1
logtext "Result: name resolving was succesful"
logtext "Output: ${FIND}"
else
logtext "Result: name resolving didn't find results"
fi
fi
if [ ${SOLARIS_LOGHOST_FOUND} -eq 1 ]; then
logtext "Result: loghost entry found and most likely used to send syslog messages"
Display --indent 2 --text "- Checking loghost entry" --result OK --color GREEN
else
Display --indent 2 --text "- Checking loghost entry" --result WARNING --color RED
logtext "Result: No loghost entry found"
ReportWarning ${TEST_NO} "L" "No loghost entry found"
ReportSuggestion ${TEST_NO} "Add a loghost entry to /etc/inet/hosts or other name services"
fi
fi
#
#################################################################################
#
# Test : LOGG-2154
# Description : Check to see if remote logging is enabled
# Notes : prevent lines showing up with commands in it (like |mail)
if [ ${SYSLOG_DAEMON_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2154 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking syslog configuration file"
if [ ${SKIPTEST} -eq 0 ]; then
if [ ${SYSLOG_NG_RUNNING} -eq 1 ]; then
SYSLOGD_CONF="/etc/syslog-ng/syslog-ng.conf"
else
SYSLOGD_CONF="/etc/syslog.conf"
fi
if [ -f ${SYSLOGD_CONF} ]; then
logtext "Test: check if logs are also logged to a remote logging host"
FIND=`egrep "@[a-zA-Z0-9]" ${SYSLOGD_CONF} | grep -v "^#" | grep -v "[a-zA-Z0-9]@"`
if [ ! "${FIND}" = "" ]; then
logtext "Result: remote logging enabled"
AddHP 5 5
Display --indent 2 --text "- Checking remote logging" --result ENABLED --color GREEN
else
logtext "Result: no remote logging found"
ReportSuggestion ${TEST_NO} "Enable logging to an external logging host for archiving purposes and additional protection"
AddHP 1 3
Display --indent 2 --text "- Checking remote logging" --result "NOT ENABLED" --color YELLOW
fi
else
logtext "Result: test skipped, file ${SYSLOGD_CONF} not found"
fi
fi
#
#################################################################################
#
# Test : LOGG-2160
# Description : Check for /etc/newsyslog.conf (FreeBSD/OpenBSD)
if [ -f /etc/newsyslog.conf ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2160 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking /etc/newsyslog.conf"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Result: /etc/newsyslog.conf found"
Display --indent 2 --text "- Checking /etc/newsyslog.conf" --result FOUND --color GREEN
LOGROTATE_CONFIG_FOUND=1
LOGROTATE_TOOL="newsyslog"
fi
#
#################################################################################
#
# Test : LOGG-2162
# Description : Check for directories in /etc/newsyslog.conf
if [ -f /etc/newsyslog.conf ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2162 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking /etc/newsyslog.conf"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: parsing directories from /etc/newsyslog.conf file"
FIND=`cat /etc/newsyslog.conf | sort | uniq | grep "^/" | awk '{ print $1 }' | sed 's/\/*[a-zA-Z_.-]*$//g' | sort | uniq`
for I in ${FIND}; do
if [ -d ${I} ]; then
logtext "Result: Directory ${I} found and exists"
report "log_directory[]=${I}"
else
logtext "Result: Item ${I} is not a directory"
fi
done
Display --indent 4 --text "- Checking log directories (newsyslog.conf)" --result DONE --color GREEN
fi
#
#################################################################################
#
# Test : LOGG-2164
# Description : Check for files in /etc/newsyslog.conf
if [ -f /etc/newsyslog.conf ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2164 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking /etc/newsyslog.conf"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: parsing directories from /etc/newsyslog.conf file"
FIND=`cat /etc/newsyslog.conf | sort | uniq | grep "^/" | awk '{ print $1 }'`
for I in ${FIND}; do
if [ -f ${I} ]; then
logtext "Result: File ${I} found and exists"
else
logtext "Result: Item ${I} is not a file"
fi
done
Display --indent 4 --text "- Checking log files (newsyslog.conf)" --result DONE --color GREEN
fi
#
#################################################################################
#
# Test : LOGG-2170
# Description : Search available log paths
Register --test-no LOGG-2170 --weight L --network NO --description "Checking log paths"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Searching log paths"
for I in ${LOG_FILES_LOCS}; do
if [ -d ${I} ]; then
logtext "Result: directory ${I} exists"
report "log_directory[]=${I}"
else
logtext "Result: directory ${I} can't be found"
fi
done
Display --indent 2 --text "- Checking log directories (static list)" --result DONE --color GREEN
fi
#
#################################################################################
#
# Test : LOGG-2180
# Description : Search open log file
Register --test-no LOGG-2180 --weight L --network NO --description "Checking open log files"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: checking open log files with lsof"
if [ ! "${LSOFBINARY}" = "" ]; then
FIND=`${LSOFBINARY} -n 2>&1 | grep "log$" | egrep -v "WARNING|Output information" | awk '{ if ($5=="REG") { print $9 } }' | sort | uniq | grep -v "^$"`
for I in ${FIND}; do
logtext "Found logfile: ${I}"
report "open_logfile[]=${I}"
done
Display --indent 2 --text "- Checking open log files" --result DONE --color GREEN
else
logtext "Result: lsof not installed, skipping test"
Display --indent 2 --text "- Checking open log files" --result SKIPPED --color YELLOW
# Add suggestion
fi
fi
#
#################################################################################
#
# Test : LOGG-2190
# Description : Checking deleted files
if [ ! "${LSOFBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no LOGG-2190 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking deleted files in file table"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: checking deleted files but are still in use"
FIND=`${LSOFBINARY} -n +L 1 2>&1 | egrep -v "WARNING|Output information" | awk '{ if ($5=="REG") { print $10 } }' | grep -v "^$" | sort | uniq`
if [ ! "${FIND}" = "" ]; then
logtext "Result: found one or more files which are deleted, but still in use"
for I in ${FIND}; do
logtext "Found deleted file: ${I}"
report "deleted_file[]=${I}"
done
Display --indent 2 --text "- Checking deleted files in use" --result "FILES FOUND" --color YELLOW
ReportSuggestion ${TEST_NO} "Check what deleted files are still in use and why."
else
logtext "Result: no deleted files found"
Display --indent 2 --text "- Checking deleted files in use" --result DONE --color GREEN
fi
fi
#
#################################################################################
#
report "log_rotation_config_found=${LOGROTATE_CONFIG_FOUND}"
report "log_rotation_tool=${LOGROTATE_TOOL}"
wait_for_keypress
#
#================================================================================
# Lynis - Copyright 2007-2015, Michael Boelen, CISOfy - https://cisofy.com
|