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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2020, 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.
#
#################################################################################
#
InsertSection "${SECTION_ACCOUNTING}"
#
#################################################################################
#
AUDITD_CONF_LOCS="${ROOTDIR}etc ${ROOTDIR}etc/audit"
AUDITD_CONF_FILE=""
LINUX_AUDITD_RUNNING=0
AUDIT_DAEMON_RUNNING=0
SOLARIS_AUDITD_RUNNING=0
#
#################################################################################
#
# Test : ACCT-2754
# Description : Check availability FreeBSD accounting data
Register --test-no ACCT-2754 --os FreeBSD --weight L --network NO --category security --description "Check for available FreeBSD accounting information"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f ${ROOTDIR}var/account/acct ]; then
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_OK}" --color GREEN
LogText "Result: ${ROOTDIR}var/account/acct available"
AddHP 3 3
else
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_NOT_FOUND}" --color YELLOW
LogText "Result: No accounting information available"
LogText "Remark: Possibly there is another location where the accounting data is stored"
ReportSuggestion "${TEST_NO}" "Enable process accounting"
AddHP 2 3
fi
fi
#
#################################################################################
#
# Test : ACCT-2760
# Description : Check availability OpenBSD accounting data
Register --test-no ACCT-2760 --os OpenBSD --weight L --network NO --category security --description "Check for available OpenBSD accounting information"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f ${ROOTDIR}var/account/acct ]; then
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_OK}" --color GREEN
LogText "Result: ${ROOTDIR}var/account/acct available"
AddHP 3 3
else
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_NOT_FOUND}" --color YELLOW
LogText "Result: No accounting information available"
LogText "Remark: Possibly there is another location where the accounting data is stored"
ReportSuggestion "${TEST_NO}" "Enable process accounting"
AddHP 2 3
fi
fi
#
#################################################################################
#
# Test : ACCT-9622
# Description : Check availability Linux accounting data
# Notes : /var/log/pacct (Slackware)
Register --test-no ACCT-9622 --os Linux --weight L --network NO --category security --description "Check for available Linux accounting information"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Check accounting information"
if [ -f ${ROOTDIR}var/account/pacct ]; then
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_OK}" --color GREEN
LogText "Result: ${ROOTDIR}var/account/pacct available"
AddHP 3 3
elif [ -f ${ROOTDIR}var/log/account/pacct ]; then
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_OK}" --color GREEN
LogText "Result: ${ROOTDIR}var/log/account/pacct available"
AddHP 3 3
elif [ -f ${ROOTDIR}var/log/pacct ]; then
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_OK}" --color GREEN
LogText "Result: ${ROOTDIR}var/log/pacct available"
AddHP 3 3
else
Display --indent 2 --text "- Checking accounting information" --result "${STATUS_NOT_FOUND}" --color YELLOW
LogText "Result: No accounting information available (${ROOTDIR}var/account/pacct, ${ROOTDIR}var/log/account/pact nor ${ROOTDIR}var/log/pact exist)"
LogText "Remark: Possibly there is another location where the accounting data is stored"
ReportSuggestion "${TEST_NO}" "Enable process accounting"
AddHP 2 3
fi
fi
#
#################################################################################
#
# Test : ACCT-9626
# Description : Check sysstat accounting data
Register --test-no ACCT-9626 --os Linux --weight L --network NO --category security --description "Check for sysstat accounting data"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check ${ROOTDIR}etc/default/sysstat presence"
if [ -f ${ROOTDIR}etc/default/sysstat ]; then
LogText "Result: ${ROOTDIR}etc/default/sysstat found"
FIND=$(${GREPBINARY} "^ENABLED" ${ROOTDIR}etc/default/sysstat | ${GREPBINARY} -i true)
if [ -n "${FIND}" ]; then
LogText "Result: sysstat enabled via ${ROOTDIR}etc/default/sysstat"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_ENABLED}" --color GREEN
else
LogText "Result: sysstat disabled via ${ROOTDIR}etc/default/sysstat"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_DISABLED}" --color WHITE
ReportSuggestion "${TEST_NO}" "Enable sysstat to collect accounting (disabled)"
fi
elif [ -f ${ROOTDIR}etc/cron.d/sysstat ]; then
FIND=$(${GREPBINARY} -v '^[[:space:]]*\(#\|$\)' ${ROOTDIR}etc/cron.d/sysstat)
if [ -n "${FIND}" ]; then
LogText "Result: sysstat enabled via ${ROOTDIR}etc/cron.d/sysstat"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_ENABLED}" --color GREEN
else
LogText "Result: sysstat disabled via ${ROOTDIR}etc/cron.d/sysstat"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_DISABLED}" --color WHITE
ReportSuggestion "${TEST_NO}" "Enable sysstat to collect accounting (cron disabled)"
fi
elif [ -f "${ROOTDIR}lib/systemd/system/sysstat.service" ] || [ -f "${ROOTDIR}etc/systemd/system/sysstat.service" ]; then
LogText "Result: sysstat systemd unit found"
if [ -L "${ROOTDIR}etc/systemd/system/multi-user.target.wants/sysstat.service" ]; then
# Assuming -collect.timer and -summary.timer are enabled as well,
# as they are usually in the install section.
LogText "Result: sysstat enabled via systemd"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_ENABLED}" --color GREEN
else
LogText "Result: sysstat disabled via systemd"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_DISABLED}" --color WHITE
fi
else
LogText "Result: sysstat not found via ${ROOTDIR}etc/default/sysstat or ${ROOTDIR}etc/cron.d/sysstat or as a systemd unit"
Display --indent 2 --text "- Checking sysstat accounting data" --result "${STATUS_NOT_FOUND}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Enable sysstat to collect accounting (no results)"
fi
fi
#
#################################################################################
#
# Test : ACCT-9628
# Description : Check auditd status
if [ -n "${AUDITDBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9628 --os Linux --weight L --network NO --category security --description "Check for auditd"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Check auditd status"
# Should not get kauditd
if IsRunning "auditd"; then
LogText "Result: auditd running"
Display --indent 2 --text "- Checking auditd" --result "${STATUS_ENABLED}" --color GREEN
LINUX_AUDITD_RUNNING=1
AUDIT_DAEMON_RUNNING=1
Report "audit_trail_tool[]=auditd"
Report "linux_auditd_running=1"
AddHP 4 4
else
LogText "Result: auditd not active"
Display --indent 2 --text "- Checking auditd" --result "${STATUS_NOT_FOUND}" --color WHITE
if [ ! "${VMTYPE}" = "openvz" ]; then
ReportSuggestion "${TEST_NO}" "Enable auditd to collect audit information"
fi
AddHP 0 1
Report "linux_auditd_running=0"
fi
fi
#
#################################################################################
#
# Test : ACCT-9630
# Description : Check auditd rules
if [ -n "${AUDITDBINARY}" -a -n "${AUDITCTLBINARY}" -a ${LINUX_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9630 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --root-only YES --category security --description "Check for auditd rules"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Checking auditd rules"
FIND=$(${AUDITCTLBINARY} -l | ${GREPBINARY} -v "No rules")
if [ -z "${FIND}" ]; then
LogText "Result: auditd rules empty"
Display --indent 4 --text "- Checking audit rules" --result "${STATUS_SUGGESTION}" --color YELLOW
AddHP 0 2
ReportSuggestion "${TEST_NO}" "Audit daemon is enabled with an empty ruleset. Disable the daemon or define rules"
else
LogText "Result: found auditd rules"
Display --indent 4 --text "- Checking audit rules" --result "${STATUS_OK}" --color GREEN
# Log audit daemon rules
FIND=$(${AUDITCTLBINARY} -l | ${SEDBINARY} 's/ /!space!/g')
for RULE in ${FIND}; do
RULE=$(echo ${RULE} | ${SEDBINARY} 's/!space!/ /g')
LogText "Output: ${RULE}"
done
fi
fi
#
#################################################################################
#
# Test : ACCT-9632
# Description : Check auditd configuration file
if [ -n "${AUDITDBINARY}" -a ${LINUX_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9632 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for auditd configuration file"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Checking auditd configuration file"
for DIR in ${AUDITD_CONF_LOCS}; do
if [ -f ${DIR}/auditd.conf ]; then
AUDITD_CONF_FILE="${DIR}/auditd.conf"
LogText "Result: Found ${DIR}/auditd.conf"
else
LogText "Result: ${DIR}/auditd.conf not found"
fi
done
# Check if we discovered the configuration file. It should be there is the binaries are available and process is running
if [ -n "${AUDITD_CONF_FILE}" ]; then
Display --indent 4 --text "- Checking audit configuration file" --result "${STATUS_OK}" --color GREEN
else
LogText "Result: could not find auditd configuration file"
Display --indent 4 --text "- Checking audit configuration file" --result "${STATUS_FOUND}" --color RED
ReportSuggestion "${TEST_NO}" "Determine the location of auditd configuration file"
fi
fi
#
#################################################################################
#
# Test : ACCT-9634
# Description : Check auditd log file
if [ -n "${AUDITDBINARY}" -a ${LINUX_AUDITD_RUNNING} -eq 1 -a -n "${AUDITD_CONF_FILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9634 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for auditd log file"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Checking auditd log file"
FIND=$(${GREPBINARY} "^log_file" ${AUDITD_CONF_FILE} | ${AWKBINARY} '{ if ($1=="log_file" && $2=="=") { print $3 } }')
if [ -n "${FIND}" ]; then
LogText "Result: log file is defined"
LogText "Defined value: ${FIND}"
if [ -f ${FIND} ]; then
LogText "Result: log file ${FIND} exists on disk"
Display --indent 4 --text "- Checking auditd log file" --result "${STATUS_FOUND}" --color GREEN
Report "logfile[]=${FIND}"
else
LogText "Result: can't find log file ${FIND} on disk"
Display --indent 4 --text "- Checking auditd log file" --result "${STATUS_SUGGESTION}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Check auditd log file location"
fi
else
LogText "Result: no log file found"
Display --indent 4 --text "- Checking auditd log file" --result "${STATUS_WARNING}" --color RED
ReportWarning "${TEST_NO}" "Auditd log file is defined but can not be found on disk"
fi
fi
#
#################################################################################
#
# Test : ACCT-9636
# Description : Check for Snoopy (wrapper for execve() and logger)
Register --test-no ACCT-9636 --os Linux --weight L --network NO --category security --description "Check for Snoopy wrapper and logger"
if [ ${SKIPTEST} -eq 0 ]; then
FILE="${ROOTDIR}lib/snoopy.so"
if [ -f ${FILE} ]; then
LogText "Result: found ${FILE}"
Display --indent 2 --text "- Checking Snoopy" --result "${STATUS_FOUND}" --color GREEN
if [ -f ${ROOTDIR}etc/ld.so.preload ]; then
LogText "Result: found ${ROOTDIR}etc/ld.so.preload, testing if snoopy.so is listed"
FIND=$(${GREPBINARY} ${FILE} ${ROOTDIR}etc/ld.so.preload)
if [ -n "${FIND}" ]; then
LogText "Result: found snoopy in ld.so.preload"
LogText "Output: ${FIND}"
Display --indent 6 --text "- Library in ld.so.preload" --result "LOADED" --color GREEN
Report "audit_trail_tool[]=snoopy"
else
Display --indent 6 --text "- Library in ld.so.preload" --result "${STATUS_NOT_FOUND}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Snoopy is installed but not loaded via ${ROOTDIR}etc/ld.so.preload"
AddHP 3 3
fi
else
LogText "Result: ${ROOTDIR}etc/ld.so.preload does not exist"
Display --indent 6 --text "- Library in ld.so.preload" --result "${STATUS_UNKNOWN}" --color PURPLE
ReportException "${TEST_NO}:1" "Unsure how Snoopy might be loaded as ld.so.preload does not exist"
fi
fi
fi
#
#################################################################################
#
# Test : ACCT-9650
# Description : Check Solaris audit daemon presence
Register --test-no ACCT-9650 --os Solaris --weight L --network NO --category security --description "Check Solaris audit daemon"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check if audit daemon is running"
if IsRunning "auditd"; then
LogText "Result: Solaris audit daemon is running"
SOLARIS_AUDITD_RUNNING=1
AUDIT_DAEMON_RUNNING=1
Display --indent 2 --text "- Checking Solaris audit daemon status" --result "${STATUS_RUNNING}" --color GREEN
else
LogText "Result: Solaris audit daemon is not running"
Display --indent 2 --text "- Checking Solaris audit daemon status" --result "${STATUS_NOT_RUNNING}" --color YELLOW
fi
fi
#
#################################################################################
#
# Test : ACCT-9652
# Description : Check Solaris auditd service status
if [ -x ${ROOTDIR}usr/bin/svcs -a ${SOLARIS_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9652 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check auditd SMF status"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check if auditd service is enabled and online"
FIND=$(${ROOTDIR}usr/bin/svcs svc:/system/auditd:default | ${GREPBINARY} "^online")
if [ -n "${FIND}" ]; then
LogText "Result: auditd service is online"
Display --indent 4 --text "- Checking Solaris audit daemon status" --result "${STATUS_ON}"LINE --color GREEN
else
Display --indent 4 --text "- Checking Solaris audit daemon status" --result "NOT ONLINE" --color YELLOW
ReportSuggestion "${TEST_NO}" "Check status of audit daemon"
fi
fi
#
#################################################################################
#
# Test : ACCT-9654
# Description : Check Solaris Basic Security Mode (BSM) in /etc/system
if [ ${SOLARIS_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9654 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check BSM auditing in ${ROOTDIR}etc/system"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check if BSM is enabled in ${ROOTDIR}etc/system"
if [ -f ${ROOTDIR}etc/system ]; then
FIND=$(${GREPBINARY} 'set c2audit:audit_load = 1' ${ROOTDIR}etc/system)
if [ -n "${FIND}" ]; then
LogText "Result: BSM is enabled in ${ROOTDIR}etc/system"
Display --indent 4 --text "- Checking Solaris BSM (${ROOTDIR}etc/system)" --result "${STATUS_ENABLED}" --color GREEN
else
Display --indent 4 --text "- Checking Solaris BSM (${ROOTDIR}etc/system)" --result "${STATUS_NOT_FOUND}" --color YELLOW
fi
else
LogText "Result: ${ROOTDIR}etc/system does not exist"
fi
fi
#
#################################################################################
#
# Test : ACCT-9656
# Description : Check Solaris BSM (c2audit) module status
# Notes : todo - replace direct binary call
if [ ${SOLARIS_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9656 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check BSM auditing in module list"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check if c2audit module is active"
if [ -x ${ROOTDIR}usr/sbin/modinfo ]; then
FIND=$(${ROOTDIR}usr/sbin/modinfo | ${GREPBINARY} c2audit)
if [ -n "${FIND}" ]; then
LogText "Result: c2audit found in modinfo output"
Display --indent 4 --text "- Checking Solaris BSM (modules list)" --result "${STATUS_ENABLED}" --color GREEN
else
LogText "Result: c2audit not found in modinfo output"
Display --indent 4 --text "- Checking Solaris BSM (modules list)" --result "${STATUS_NOT_FOUND}" --color YELLOW
fi
else
LogText "Result: ${ROOTDIR}usr/sbin/modinfo does not exist, skipping test"
fi
fi
#
#################################################################################
#
# Test : ACCT-9660
# Description : Check location for audit events
if [ ${SOLARIS_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9660 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check location of audit events"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check ${ROOTDIR}etc/security/audit_control for event logging location"
if [ -f ${ROOTDIR}etc/security/audit_control ]; then
LogText "Result: file ${ROOTDIR}etc/security/audit_control found"
FIND=$(${GREPBINARY} "^dir" ${ROOTDIR}etc/security/audit_control | ${AWKBINARY} -F: '{ print $2 }')
if [ -n "${FIND}" ]; then
LogText "Result: found location ${FIND}"
LogText "Test: Checking if location is a valid directory"
if [ -d ${FIND} ]; then
LogText "Result: location ${FIND} is valid"
Display --indent 4 --text "- Checking Solaris audit location" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: location ${FIND} does not exist"
Display --indent 4 --text "- Checking Solaris audit location" --result "${STATUS_NOT_FOUND}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Check if the Solaris audit directory is available"
fi
else
LogText "Result: unknown event location"
Display --indent 4 --text "- Checking Solaris audit location" --result "${STATUS_UNKNOWN}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Check if the Solaris audit directory is properly configured"
fi
else
LogText "Result: could not find ${ROOTDIR}etc/security/audit_control"
Display --indent 4 --text "- Checking Solaris audit location" --result "${STATUS_SKIPPED}" --color YELLOW
fi
fi
#
#################################################################################
#
# Test : ACCT-9662
# Description : check auditstat
if [ ${SOLARIS_AUDITD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no ACCT-9662 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check Solaris auditing stats"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Check auditing statistics"
if [ -x ${ROOTDIR}usr/sbin/auditstat ]; then
FIND=$(${ROOTDIR}usr/sbin/auditstat | ${TRBINARY} -s ' ' ',')
for ITEM in ${FIND}; do
LogText "Output: ${ITEM}"
done
Display --indent 4 --text "- Checking Solaris audit statistics" --result "${STATUS_DONE}" --color GREEN
else
LogText "Result: ${ROOTDIR}usr/sbin/auditstat not found, skipping test"
Display --indent 4 --text "- Checking Solaris audit statistics" --result "${STATUS_SKIPPED}" --color YELLOW
fi
fi
#
#################################################################################
#
Report "audit_daemon_running=${AUDIT_DAEMON_RUNNING}"
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Copyright 2007-2020, Michael Boelen / CISOfy - https://cisofy.com
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