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lynis/plugins/plugin_systemd_phase1

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#!/bin/sh
#########################################################################
#
# * DO NOT REMOVE *
#-----------------------------------------------------
# PLUGIN_AUTHOR=Michael Boelen <michael.boelen@cisofy.com>
# PLUGIN_CATEGORY=essentials
# PLUGIN_DATE=2020-03-23
# PLUGIN_DESC=Tests related to systemd tooling
# PLUGIN_NAME=systemd
# PLUGIN_PACKAGE=community
# PLUGIN_REQUIRED_TESTS=
# PLUGIN_VERSION=1.0.4
#-----------------------------------------------------
#
#########################################################################
#
SYSTEMD_COREDUMP_USED=0
SYSTEMD_FSS_FILE=""
SYSTEMD_MACHINEID=""
SYSTEMD_RUNNING=0
SYSTEMD_VERSION=0
#
#########################################################################
#
# Test : PLGN-3800
# Description : Gather systemctl exit code
if [ -n "${SYSTEMCTLBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3800 --preqs-met ${PREQS_MET} --weight L --network NO --description "Gather systemctl exit code" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} > /dev/null)
if [ $? -gt 0 ]; then
Report "systemctl_error_message=${FIND}"
else
SYSTEMD_RUNNING=1
fi
Report "systemctl_exit_code=$?"
fi
#
#########################################################################
#
# Test : PLGN-3802
# Description : Query systemd version and options
# Notes : version can also be gathered with systemctl show | grep ^Version=
# features with systemctl show | grep ^Features=
if [ -n "${SYSTEMCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3802 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query systemd version and options" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} --version 2> /dev/null | ${AWKBINARY} '{ if ($1=="systemd") { print $2 } }' | grep "^[1-9][0-9][0-9]$" | head -1)
if [ -n "${FIND}" ]; then
SYSTEMD_VERSION=${FIND}
Report "systemd_version=${FIND}"
LogText "Result: found systemd version ${FIND}"
fi
FIND=$(${SYSTEMCTLBINARY} --version 2> /dev/null | grep "^[-+]" | sed 's/[[:space:]]/,/g' | head -1)
if [ -n "${FIND}" ]; then
Report "systemd_builtin_components=${FIND}"
LogText "Result: found builtin components list"
fi
fi
#
#################################################################################
#
# Test : PLGN-3804
# Description : Gather all systemd unit files
if [ -n "${SYSTEMCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3804 --preqs-met ${PREQS_MET} --weight L --network NO --description "Gather systemd unit files and their status" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} --no-legend list-unit-files 2> /dev/null | ${AWKBINARY} '{ print $1"|"$2"|" }')
if [ -n "${FIND}" ]; then
LogText "Result: found systemd unit files via systemctl list-unit-files"
for I in ${FIND}; do
LogText "Output: ${I}"
Report "systemd_unit_file[]=${I}"
done
fi
fi
#
#################################################################################
#
# Test : PLGN-3806
# Description : Gather all failed systemd units
if [ -n "${SYSTEMCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3806 --preqs-met ${PREQS_MET} --weight L --network NO --description "Gather failed systemd units" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} --no-legend --state=failed 2> /dev/null | ${AWKBINARY} '{ if ($4=="failed" && $5=="failed") { print $2 } }')
if [ -n "${FIND}" ]; then
LogText "Result: found systemd unit files via systemctl list-unit-files"
for I in ${FIND}; do
LogText "Output: ${I}"
Report "systemd_unit_file[]=${I}"
done
fi
fi
#
#################################################################################
#
# Test : PLGN-3808
# Description : Gather machine ID
if [ -f ${ROOTDIR}etc/machine-id -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3808 --preqs-met ${PREQS_MET} --weight L --network NO --description "Gather systemd machine ID" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(cat ${ROOTDIR}etc/machine-id | head -1)
if [ -n "${FIND}" ]; then
SYSTEMD_MACHINEID="${FIND}"
LogText "Result: found machine ID: ${SYSTEMD_MACHINEID}"
fi
fi
#
#################################################################################
#
# Test : PLGN-3810
# Description : Query main systemd binaries
if [ -n "${FINDBINARY}" -a -d /usr/lib/systemd -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3810 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query main systemd binaries" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${FINDBINARY} ${ROOTDIR}usr/lib/systemd -maxdepth 1 -type f -name "systemd-*" -printf "%f|")
if [ -n "${FIND}" ]; then
Report "systemd_binaries=${FIND}"
LogText "Result: found systemd binaries in /usr/lib/systemd"
else
LogText "Result: no binaries found in /usr/lib/systemd"
fi
fi
#
#################################################################################
#
# Test : PLGN-3812
# Description : Query journal for boot related information
if [ -n "${JOURNALCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 -a ${SYSTEMD_VERSION} -ge 209 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3812 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query journal for boot related information" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${JOURNALCTLBINARY} --list-boots | wc -l)
LogText "Output: number of boots listed in journal is ${FIND}"
if [ -n "${FIND}" ]; then Report "journal_bootlogs=${FIND}"; fi
FIND=$(${JOURNALCTLBINARY} --list-boots | head -1 | awk '{ print $4 }')
LogText "Output: oldest boot date in journal is ${FIND}"
if [ -n "${FIND}" ]; then Report "journal_oldest_bootdate=${FIND}"; fi
fi
#
#################################################################################
#
# Test : PLGN-3814
# Description : Journal integrity
if [ -n "${JOURNALCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3814 --preqs-met ${PREQS_MET} --weight L --network NO --description "Verify journal integrity" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${JOURNALCTLBINARY} --verify 2>&1 | grep FAIL | sed 's/[[:space:]]/:space:/g')
if [ -n "${FIND}" ]; then
Report "journal_contains_errors=1"
for I in ${FIND}; do
LINE=$(echo ${I} | sed 's/:space:/ /g')
LogText "Output (fails): ${LINE}"
done
else
Report "journal_contains_errors=0"
LogText "Result: systemd journal has no errors"
fi
fi
#
#################################################################################
#
# Test : PLGN-3816
# Description : Journal sizing
if [ -n "${JOURNALCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3816 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query journal for boot related information" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${JOURNALCTLBINARY} --disk-usage | awk '{ if ($1=="Journals") { print $4 } else if ($1=="Archived") { print $7 }}')
Report "journal_disk_size=${FIND}"
LogText "Result: journals are ${FIND} in size"
fi
#
#################################################################################
#
# Test : PLGN-3818
# Description : Journal meta data
if [ -n "${JOURNALCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3818 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query journal meta data" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${JOURNALCTLBINARY} --header | sed 's/^$/|/g' | tr '\n' ',' | sed 's/[[:space:]]//g')
Report "journal_meta_data=${FIND}"
fi
#
#################################################################################
#
# Test : PLGN-3820
# Description : Journal FSS (Forward Secure Sealing) configuration
if [ -n "${JOURNALCTLBINARY}" -a -n "${SYSTEMD_MACHINEID}" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3820 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for journal FSS configuration" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FILE="/var/log/journal/${SYSTEMD_MACHINEID}/fss"
if [ -f ${FILE} ]; then
SYSTEMD_FSS_FILE="${FILE}"
Report "journal_fss=1"
Report "journal_fss_file=${SYSTEMD_FSS_FILE}"
fi
fi
#
#################################################################################
#
# Test : PLGN-3830
# Description : Query systemd status
if [ -n "${SYSTEMCTLBINARY}" -a ${SYSTEMD_RUNNING} -eq 1 -a ${SYSTEMD_VERSION} -ge 215 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3830 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query systemd status" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} is-system-running 2> /dev/null | head -1)
if [ -n "${FIND}" ]; then
Report "systemd_status=${FIND}"
LogText "Result: found systemd status = ${FIND}"
fi
fi
#
#################################################################################
#
# Test : PLGN-3832
# Description : Query processes which can not be found
if [ ! "${SYSTEMCTLBINARY}" = "" -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3832 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query systemd status for processes which can not be found" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} --no-legend --all --state=not-found 2> /dev/null | awk '{ print $1 }')
if [ -n "${FIND}" ]; then
for I in ${FIND}; do
Report "systemd_unit_not_found[]=${I}"
done
fi
fi
#
#################################################################################
#
# Test : PLGN-3834
# Description : Gather units from systemd which can not be found
if [ -n "${SYSTEMCTLBINARY}" -a -n "${AWKBINARY}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3834 --preqs-met ${PREQS_MET} --weight L --network NO --description "Collect service units which can not be found in systemd" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${SYSTEMCTLBINARY} list-units -t service --all | ${AWKBINARY} '{ if ($3=="not-found") { print $2 }}')
if [ -n "${FIND}" ]; then
LogText "Result: found one or more services with faulty state"
for I in ${FIND}; do
LogText "Result: service seems to be faulty (not-found) ${I}"
Report "systemd_service_not_found[]=$I"
done
fi
fi
#
#################################################################################
#
# Test : PLGN-3856
# Description : Check if systemd-coredump is used
if [ -f /proc/sys/kernel/core_pattern -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3856 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check if systemd-coredump is used" --progress
if [ ${SKIPTEST} -eq 0 ]; then
SYSTEMD_COREDUMP_USED=1
FIND=$(cat /proc/sys/kernel/core_pattern | grep systemd-coredump)
if [ -n "${FIND}" ]; then
LogText "Result: systemd uses systemd-coredump to handle coredumps"
Report "systemd_coredump_used=1"
fi
fi
#
#################################################################################
#
# Test : PLGN-3858
# Description : Check if coredumps are placed on disk or in the journal
# Notes : systemd 215+
#
#################################################################################
#
# Test : PLGN-3860
# Description : Query coredumps from journalctl since Yesterday
if [ -n "${JOURNALCTLBINARY}" -a ${SYSTEMD_COREDUMP_USED} -eq 1 -a ${SYSTEMD_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no PLGN-3860 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query coredumps from journals since Yesterday" --progress
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${JOURNALCTLBINARY} SYSLOG_IDENTIFIER=systemd-coredump --since=yesterday -o cat 2> /dev/null)
if [ -n "${FIND}" ]; then
Report "journal_coredumps_lastday=1"
LogText "Result: found recent coredumps"
else
Report "journal_coredumps_lastday=0"
LogText "Result: found no coredumps"
fi
fi
#
#################################################################################
#
# coredumpctl info (systemd 215+)
# coredumpctl -1 (systemd 215+)
# systemd-timesyncd (systemd 213+)
# systemctl list-machines (systemd 212+)
# systemd-journal-remote (systemd 212+)
# systemctl list-timers (systemd 209+)
# systemctl cat (systemd 209+)
#EOF
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