#!/bin/sh ################################################################################# # # Lynis # ------------------ # # Copyright 2007-2013, Michael Boelen # Copyright 2007-2021, CISOfy # # Website : https://cisofy.com # Blog : http://linux-audit.com # GitHub : https://github.com/CISOfy/lynis # # 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="${ROOTDIR}var/log ${ROOTDIR}var/adm" LOGROTATE_CONFIG_FOUND=0 LOGROTATE_TOOL="" METALOG_RUNNING=0 RFC3195D_RUNNING=0 RSYSLOG_RUNNING=0 SOLARIS_LOGHOST="" SOLARIS_LOGHOST_FOUND=0 SOLARIS_LOGHOST_LOCALHOST=0 SYSLOG_DAEMON_PRESENT=0 SYSLOG_DAEMON_RUNNING=0 SYSLOG_NG_RUNNING=0 SYSTEMD_JOURNAL_RUNNING=0 # ################################################################################# # InsertSection "${SECTION_LOGGING_AND_FILES}" # Test : LOGG-2130 # Description : Check for a running syslog daemon Register --test-no LOGG-2130 --weight L --network NO --category security --description "Check for running syslog daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for a logging daemon" FIND=$(${PSBINARY} ax | ${EGREPBINARY} "syslogd|syslog-ng|metalog|systemd-journal" | ${GREPBINARY} -v "grep") if [ -z "${FIND}" ]; then Display --indent 2 --text "- Checking for a running log daemon" --result "${STATUS_WARNING}" --color RED LogText "Result: Could not find a syslog daemon like syslog, syslog-ng, rsyslog, metalog, systemd-journal" ReportSuggestion "${TEST_NO}" "Check if any syslog daemon is running and correctly configured." AddHP 0 3 else Display --indent 2 --text "- Checking for a running log daemon" --result "${STATUS_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 --category security --description "Check for running syslog-ng daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for syslog-ng daemon in process list" if IsRunning "syslog-ng"; then LogText "Result: Found syslog-ng in process list" Display --indent 4 --text "- Checking Syslog-NG status" --result "${STATUS_FOUND}" --color GREEN SYSLOG_DAEMON_PRESENT=1 SYSLOG_NG_RUNNING=1 Report "syslog_daemon_present=1" Report "syslog_daemon[]=syslog-ng" else LogText "Result: Syslog-ng NOT found in process list" Display --indent 4 --text "- Checking Syslog-NG status" --result "${STATUS_NOT_FOUND}" --color WHITE fi fi # ################################################################################# # # Test : LOGG-2134 # Description : Check for Syslog-NG configuration file consistency if [ ! "${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 --category security --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 "${STATUS_OK}" --color GREEN else LogText "Result: Syslog-NG configuration file seems NOT to be consistent" Display --indent 6 --text "- Checking Syslog-NG consistency" --result "${STATUS_WARNING}" --color RED 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 --category security --description "Check for running systemd journal daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for systemd journal daemon in process list" if IsRunning "systemd-journal"; then Display --indent 4 --text "- Checking systemd journal status" --result "${STATUS_FOUND}" --color GREEN SYSTEMD_JOURNAL_RUNNING=1 Report "syslog_daemon_present=1" Report "syslog_daemon[]=systemd-journal" else Display --indent 4 --text "- Checking systemd journal status" --result "${STATUS_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 --category security --description "Check for running metalog daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for metalog daemon in process list" if IsRunning "metalog"; then LogText "Result: Found metalog in process list" Display --indent 4 --text "- Checking Metalog status" --result "${STATUS_FOUND}" --color GREEN SYSLOG_DAEMON_PRESENT=1 METALOG_RUNNING=1 Report "syslog_daemon_present=1" Report "syslog_daemon[]=metalog" else LogText "Result: metalog NOT found in process list" Display --indent 4 --text "- Checking Metalog status" --result "${STATUS_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 --category security --description "Check for running RSyslog daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for RSyslog daemon in process list" if IsRunning "rsyslogd"; then LogText "Result: Found rsyslogd in process list" Display --indent 4 --text "- Checking RSyslog status" --result "${STATUS_FOUND}" --color GREEN SYSLOG_DAEMON_PRESENT=1 RSYSLOG_RUNNING=1 Report "syslog_daemon_present=1" Report "syslog_daemon[]=rsyslog" else LogText "Result: rsyslogd NOT found in process list" Display --indent 4 --text "- Checking RSyslog status" --result "${STATUS_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 --category security --description "Check for running RFC 3195 compliant daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching for RFC 3195 daemon (alias syslog reliable) in process list" if IsRunning "rfc3195d"; then LogText "Result: Found rfc3195d in process list" Display --indent 4 --text "- Checking RFC 3195 daemon status" --result "${STATUS_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 "${STATUS_NOT_FOUND}" --color WHITE fi fi # ################################################################################# # # Test : LOGG-2138 # Description : Check for kernel log daemon (klogd) presence on Linux systems # Notes : * When using metalog, 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 --category security --description "Checking kernel logger daemon on Linux" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching kernel logger daemon (klogd)" if [ ${RSYSLOG_RUNNING} -eq 0 ] && [ ${SYSTEMD_JOURNAL_RUNNING} -eq 0 ] && [ ${METALOG_RUNNING} -eq 0 ]; then # Search for klogd, but ignore other lines related to klogd (like dd with input/output file) #FIND=$(${PSBINARY} ax | ${GREPBINARY} "klogd" | ${GREPBINARY} -v "dd" | ${GREPBINARY} -v "grep") if IsRunning "klogd"; then LogText "Result: klogd running" Display --indent 4 --text "- Checking klogd" --result "${STATUS_FOUND}" --color GREEN else LogText "Result: No klogd found" Display --indent 4 --text "- Checking klogd" --result "${STATUS_NOT_FOUND}" --color RED ReportWarning "${TEST_NO}" "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 --category security --description "Checking minilog daemon" if [ ${SKIPTEST} -eq 0 ]; then LogText "Result: Checking for unkilled minilogd instances" # Search for minilogd. It shouldn't be running normally, if another syslog daemon is started if IsRunning "minilogd"; then Display --indent 4 --text "- Checking minilogd instances" --result "${STATUS_WARNING}" --color RED LogText "Result: minilogd found in process list" # minilogd daemon seems to be running ReportWarning "${TEST_NO}" "minilogd is running, which should normally not be running" else Display --indent 4 --text "- Checking minilogd instances" --result "${STATUS_NOT_FOUND}" --color WHITE LogText "Result: No minilogd is 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 --category security --description "Checking logrotate.conf and logrotate.d" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking for ${ROOTDIR}etc/logrotate.conf" if [ -f ${ROOTDIR}etc/logrotate.conf ]; then LOGROTATE_CONFIG_FOUND=1 LOGROTATE_TOOL="logrotate" LogText "Result: ${ROOTDIR}etc/logrotate.conf found (file)" else LogText "Result: ${ROOTDIR}etc/logrotate.conf NOT found" fi LogText "Test: Checking for ${ROOTDIR}etc/logrotate.d (directory)" if [ -d ${ROOTDIR}etc/logrotate.d ]; then LOGROTATE_CONFIG_FOUND=1 LOGROTATE_TOOL="logrotate" LogText "Result: ${ROOTDIR}etc/logrotate.d found" else LogText "Result: ${ROOTDIR}etc/logrotate.conf found" fi if [ ${LOGROTATE_CONFIG_FOUND} -eq 1 ]; then Display --indent 2 --text "- Checking logrotate presence" --result "${STATUS_OK}" --color GREEN LogText "Result: logrotate configuration found" else Display --indent 2 --text "- Checking logrotate presence" --result "${STATUS_WARNING}" --color RED LogText "Result: No logrotate configuration found" ReportSuggestion "${TEST_NO}" "Check if log files are properly rotated" fi fi # ################################################################################# # # Test : LOGG-2148 # Description : Checking log files rotated with logrotate if [ -n "${LOGROTATEBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no LOGG-2148 --weight L --preqs-met ${PREQS_MET} --network NO --category security --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 ${ROOTDIR}etc/logrotate.conf 2>&1 | ${EGREPBINARY} "considering log|skipping" | ${GREPBINARY} -v '*' | ${SORTBINARY} -u | ${AWKBINARY} '{ if ($2!="log") { print "File:"$2":does_not_exist" } else { print "File:"$3":exists" } }') if [ -z "${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: ${I}" done fi fi # ################################################################################# # # Test : LOGG-2150 # Description : Checking log directories rotated with logrotate if HasData "${LOGROTATEBINARY}"; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no LOGG-2150 --weight L --preqs-met ${PREQS_MET} --network NO --category security --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 ${ROOTDIR}etc/logrotate.conf 2>&1 | ${EGREPBINARY} "considering log|skipping" | ${GREPBINARY} -v '*' | ${SORTBINARY} -u | ${AWKBINARY} '{ if ($2=="log") { print $3 } }' | ${SEDBINARY} 's@/[^/]*$@@g' | ${SORTBINARY} -u) if IsEmpty "${FIND}"; then LogText "Result: nothing found" else LogText "Result: found one or more directories (via logrotate configuration)" for DIR in ${FIND}; do if [ -d ${DIR} ]; then LogText "Directory found: ${DIR}" Report "log_directory[]=${DIR}" else LogText "Result: Directory could not be found: ${DIR}" fi done fi fi # ################################################################################# # # Test : LOGG-2152 # Description : Check for Solaris 'loghost' entry in /etc/inet/hosts, or # successful resolving via DNS or any other name service. Register --test-no LOGG-2152 --weight L --os Solaris --network NO --category security --description "Checking loghost" if [ ${SKIPTEST} -eq 0 ]; then # Try local hosts file LogText "Result: Checking for loghost in /etc/inet/hosts" FIND=$(${GREPBINARY} loghost /etc/inet/hosts | ${GREPBINARY} -v "^#") if [ -n "${FIND}" ]; then SOLARIS_LOGHOST="${FIND}" SOLARIS_LOGHOST_FOUND=1 LogText "Result: Found loghost entry in /etc/inet/hosts" else LogText "Result: No loghost entry found in /etc/inet/hosts" # Try name resolving if no entry is present in local host file LogText "Result: Checking for loghost via name resolving" FIND=$(getent hosts loghost | ${GREPBINARY} loghost) if [ -n "${FIND}" ]; then SOLARIS_LOGHOST="${FIND}" SOLARIS_LOGHOST_FOUND=1 LogText "Result: name resolving was successful" LogText "Output: ${FIND}" else LogText "Result: name resolving didn't find results" fi fi if [ ${SOLARIS_LOGHOST_FOUND} -eq 1 ]; then LogText "Result: loghost entry found and most likely used to send syslog messages" Display --indent 2 --text "- Checking loghost entry" --result "${STATUS_OK}" --color GREEN else Display --indent 2 --text "- Checking loghost entry" --result "${STATUS_WARNING}" --color RED LogText "Result: No loghost entry found" ReportWarning "${TEST_NO}" "No loghost entry found" ReportSuggestion "${TEST_NO}" "Add a loghost entry to /etc/inet/hosts or other name services" fi fi # ################################################################################# # # Test : LOGG-2153 # Description : Check Solaris 'loghost' entry is not localhost, meaning # remote logging is not configured. if [ ${SOLARIS_LOGHOST_FOUND} -eq 1 ] && [ -n "${SOLARIS_LOGHOST}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no LOGG-2153 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking loghost is localhost" if [ ${SKIPTEST} -eq 0 ]; then FIND=$(echo "${SOLARIS_LOGHOST}" | ${AWKBINARY} '{ print $1 }' | ${EGREPBINARY} "::1|127.0.0.1|127.1") if [ -n "${FIND}" ]; then SOLARIS_LOGHOST_LOCALHOST=1 LogText "Result: loghost entry is localhost (default)" Display --indent 4 --text "- Checking loghost entry is localhost" --result "${STATUS_YES}" --color YELLOW ReportSuggestion "${TEST_NO}" "Set loghost entry to a remote location to enable remote logging." else Display --indent 4 --text "- Checking loghost entry is localhost" --result "${STATUS_NO}" --color GREEN 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 --category security --description "Checking syslog configuration file" if [ ${SKIPTEST} -eq 0 ]; then if [ ${RSYSLOG_RUNNING} -eq 1 ]; then DATA="" TARGET="${ROOTDIR}etc/rsyslog.conf" if [ -f ${TARGET} ]; then LogText "Test: analyzing file ${TARGET} for remote target" DATA=$(${EGREPBINARY} "@@?([a-zA-Z0-9\-])+(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?" ${TARGET} | ${GREPBINARY} -v "#" | ${TRBINARY} -cd "[:print:]\n" | ${SEDBINARY} 's/[[:blank:]]\{1,\}/:space:/g') if [ -z "${DATA}" ]; then LogText "Result: no remote target found" else LogText "Result: found remote target" REMOTE_LOGGING_ENABLED=1 for D in ${DATA}; do if SafeInput "${D}"; then D=$(echo ${D} | ${SEDBINARY} 's/:space:/ /g') LogText "Data: ${D}" fi done fi fi TARGET="${ROOTDIR}etc/rsyslog.d" if [ -d ${TARGET} ]; then FILES=$(${FINDBINARY} ${TARGET} -type f -print0 | ${TRBINARY} -cd '[:print:]\0' | ${SEDBINARY} 's/[[:blank:]]/:space:/g' | ${TRBINARY} '\0' ' ') for F in ${FILES}; do F=$(echo ${F} | ${SEDBINARY} 's/:space:/ /g') LogText "Test: analyzing file ${F} for remote target" DATA=$(${EGREPBINARY} "@@?([a-zA-Z0-9\-])+(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?(\.)?(([a-zA-Z0-9-])+)?" ${F} | ${GREPBINARY} -v "#" | ${TRBINARY} -cd "[:print:]\n" | ${SEDBINARY} 's/[[:blank:]]\{1,\}/:space:/g') if [ -n "${DATA}" ]; then LogText "Result: found remote target" REMOTE_LOGGING_ENABLED=1 for D in ${DATA}; do if SafeInput "${D}"; then D=$(echo ${D} | ${SEDBINARY} 's/:space:/ /g') LogText "Data: ${D}" fi done else # Check new style configuration (omrelp/omfwd). This can be all on one line or even split over multiple lines. DATA=$(${EGREPBINARY} "target=\"([a-zA-Z0-9\-])" ${F}) if [ -n "${DATA}" ]; then LogText "Result: most likely remote log host is used, as keyword 'target' is used" REMOTE_LOGGING_ENABLED=1 else LogText "Result: no remote target found" fi fi done fi fi # Test generic syslog files (syslog-ng and older syslog daemons) if [ ${SYSLOG_NG_RUNNING} -eq 1 ]; then SYSLOGD_CONF="${ROOTDIR}etc/syslog-ng/syslog-ng.conf" else SYSLOGD_CONF="${ROOTDIR}etc/syslog.conf" fi if [ -f ${SYSLOGD_CONF} ]; then LogText "Test: check if logs are also logged to a remote logging host" FIND=$(${EGREPBINARY} "@[a-zA-Z0-9]|destination\s.+(udp|tcp).+\sport" ${SYSLOGD_CONF} | ${GREPBINARY} -v "^#" | ${GREPBINARY} -v "[a-zA-Z0-9]@") if [ -n "${FIND}" ]; then FIND2=$(echo "${FIND}" | ${GREPBINARY} -v "@loghost") if [ ${SOLARIS_LOGHOST_LOCALHOST} -eq 1 ] && [ -z "${FIND2}" ]; then LogText "Result: remote logging enabled to loghost, but loghost is localhost" else LogText "Result: remote logging enabled" REMOTE_LOGGING_ENABLED=1 fi else # Search for configured destinations with an IP address or hostname, then determine which ones are used as a log destination DESTINATIONS=$(${GREPBINARY} "^destination" ${SYSLOGD_CONF} | ${EGREPBINARY} "(udp|tcp)" | ${GREPBINARY} "port" | ${AWKBINARY} '{print $2}') for DESTINATION in ${DESTINATIONS}; do FIND2=$(${GREPBINARY} "log" ${SYSLOGD_CONF} | ${GREPBINARY} "source" | ${EGREPBINARY} "destination\(${DESTINATION}\)") if [ -n "${FIND2}" ]; then LogText "Result: found destination ${DESTINATION} configured for remote logging" REMOTE_LOGGING_ENABLED=1 fi done fi fi # Show result if [ ${REMOTE_LOGGING_ENABLED} -eq 0 ]; then Report "remote_syslog_configured=0" LogText "Result: no remote logging found" ReportSuggestion "${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 "${STATUS_NOT_ENABLED}" --color YELLOW else Report "remote_syslog_configured=1" AddHP 5 5 Display --indent 2 --text "- Checking remote logging" --result "${STATUS_ENABLED}" --color GREEN fi fi # ################################################################################# # # Test : LOGG-2160 # Description : Check for /etc/newsyslog.conf (FreeBSD/OpenBSD) if [ -f ${ROOTDIR}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 --category security --description "Checking /etc/newsyslog.conf" if [ ${SKIPTEST} -eq 0 ]; then LogText "Result: ${ROOTDIR}etc/newsyslog.conf found" Display --indent 2 --text "- Checking ${ROOTDIR}etc/newsyslog.conf" --result "${STATUS_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 --category security --description "Checking directories in /etc/newsyslog.conf" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: parsing directories from /etc/newsyslog.conf file" FIND=$(${AWKBINARY} '/^\// { print $1 }' /etc/newsyslog.conf | ${SEDBINARY} 's/\/*[a-zA-Z_.-]*$//g' | ${SORTBINARY} -u) for I in ${FIND}; do if [ -d ${I} ]; then LogText "Result: Directory ${I} found and exists" Report "log_directory[]=${I}" else LogText "Result: Item ${I} is not a directory" fi done Display --indent 4 --text "- Checking log directories (newsyslog.conf)" --result "${STATUS_DONE}" --color GREEN fi # ################################################################################# # # Test : LOGG-2164 # Description : Check for files in /etc/newsyslog.conf if [ -f ${ROOTDIR}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 --category security --description "Checking files specified /etc/newsyslog.conf" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: parsing files from ${ROOTDIR}etc/newsyslog.conf file" FIND=$(${AWKBINARY} '/^\// { print $1 }' ${ROOTDIR}etc/newsyslog.conf | ${SORTBINARY} -u) for I in ${FIND}; do if [ -f ${I} ]; then LogText "Result: File ${I} found and exists" else LogText "Result: Item ${I} is not a file" fi done Display --indent 4 --text "- Checking log files (newsyslog.conf)" --result "${STATUS_DONE}" --color GREEN fi # ################################################################################# # # Test : LOGG-2170 # Description : Search available log paths Register --test-no LOGG-2170 --weight L --network NO --category security --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 ${I} can't be found" fi done Display --indent 2 --text "- Checking log directories (static list)" --result "${STATUS_DONE}" --color GREEN fi # ################################################################################# # # Test : LOGG-2180 # Description : Search open log file Register --test-no LOGG-2180 --weight L --network NO --category security --description "Checking open log files" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: checking open log files with lsof" if [ -n "${LSOFBINARY}" ]; then FIND=$(${LSOFBINARY}${LSOF_EXTRA_OPTIONS} -n 2>&1 | ${GREPBINARY} "log$" | ${EGREPBINARY} -v "WARNING|Output information" | ${AWKBINARY} '{ if ($5=="REG") { print $9 } }' | ${SORTBINARY} -u | ${GREPBINARY} -v "^$") for I in ${FIND}; do LogText "Found logfile: ${I}" done Display --indent 2 --text "- Checking open log files" --result "${STATUS_DONE}" --color GREEN else LogText "Result: lsof not installed, skipping test" Display --indent 2 --text "- Checking open log files" --result "${STATUS_SKIPPED}" --color WHITE fi fi # ################################################################################# # # Test : LOGG-2190 # Description : Checking deleted files if [ -n "${LSOFBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no LOGG-2190 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking for deleted files in use" if [ ${SKIPTEST} -eq 0 ]; then EARLY_MYSQL="" LogText "Test: checking deleted files that are still in use" LSOF_GREP="WARNING|Output information" # MySQL versions prior to 5.6 leave lots of deleted in-use files in /tmp, ignoring those LSOF_GREP="${LSOF_GREP}|mysqld" # grsecurity causes Fail2Ban to hold onto deleted in-use files in /var/tmp if [ ${GRSEC_FOUND} -eq 1 ]; then LSOF_GREP="${LSOF_GREP}|fail2ban"; fi if [ ${OS_REDHAT_OR_CLONE} -eq 1 ]; then # If lynis is run from /etc/cron.daily some deleted in-use files are kept in /tmp LSOF_GREP="${LSOF_GREP}|anacron|awk|run-parts" fi FIND=$(${LSOFBINARY}${LSOF_EXTRA_OPTIONS} -n +L 1 2>&1 | ${EGREPBINARY} -vw "${LSOF_GREP}" | ${EGREPBINARY} -v '/dev/zero|/\[aio\]' | ${AWKBINARY} '{ if ($5=="REG") { printf "%s(%s)\n", $10, $1 } }' | ${GREPBINARY} -v "^$" | ${SORTBINARY} -u) if [ -n "${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 "${STATUS_FILES_FOUND}" --color YELLOW ReportSuggestion "${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 "${STATUS_DONE}" --color GREEN fi fi # ################################################################################# # # Test : LOGG-2192 # Description : Check for open log files which are empty. This may indicate a problem with log rotation, or unused services if [ -n "${LSOFBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no LOGG-2192 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking for open log files that are empty" if [ ${SKIPTEST} -eq 0 ]; then FIND=$(${LSOFBINARY}${LSOF_EXTRA_OPTIONS} -n -w | ${AWKBINARY} '{if ($5=="REG" && $7=="0" && $9 ~ /log$/) {print $1","$9}}' | ${SORTBINARY} | uniq) if [ -n "${FIND}" ]; then for I in ${FIND}; do LogText "Found an opened logfile that is empty: ${I}" Report "open_empty_log_file[]=${I}" done else LogText "Result: all opened log files are bigger than zero bytes in size" fi fi # ################################################################################# # Report "log_rotation_config_found=${LOGROTATE_CONFIG_FOUND}" Report "log_rotation_tool=${LOGROTATE_TOOL}" WaitForKeyPress # #================================================================================ # Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com