#!/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 directories in /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 files specified /etc/newsyslog.conf" if [ ${SKIPTEST} -eq 0 ]; then logtext "Test: parsing files 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