#!/bin/sh ################################################################################# # # Lynis # ------------------ # # Copyright 2007-2013, Michael Boelen # Copyright 2013-2016, 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. # ################################################################################# # # Category: Boot and services # ################################################################################# # InsertSection "Boot and services" # ################################################################################# # BOOT_LOADER="unknown" BOOT_LOADER_FOUND=0 BOOT_LOADER_SEARCHED=0 GRUB_VERSION=0 SERVICE_MANAGER="unknown" # ################################################################################# # # Test : BOOT-5102 # Description : Check for AIX boot device # Notes : The AIX bootstrap is called as software ROS. Bootstrap contains IPL (Initial Program loader) # TODO - binary detection of bootinfo and replace with variable Register --test-no BOOT-5102 --os AIX --weight L --network NO --root-only YES --category security --description "Check for AIX boot device" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 LogText "Test: Query bootinfo for AIX boot device" if [ -x /usr/sbin/bootinfo ]; then FIND=$(/usr/sbin/bootinfo -b) if [ ! -z "${FIND}" ]; then LogText "Result: found boot device ${FIND}" Display --indent 2 --text "- Checking boot device (bootinfo)" --result "${STATUS_FOUND}" --color GREEN BOOT_LOADER="ROS" BOOT_LOADER_FOUND=1 else LogText "Result: no data received from bootinfo, most likely boot device not found" #Display --indent 4 --text "- Checking boot device (bootinfo)" --result "${STATUS_NOT_FOUND}" --color YELLOW #ReportSuggestion ${TEST_NO} "Only use root (not sudo account) to query properly boot device" fi fi fi # ################################################################################# # # Test : BOOT-5104 # Description : Determine service manager # Notes : # initscripts - Used by Arch before # systemd - Common option with more Linux distros implementing it # upstart - Used by Debian/Ubuntu Register --test-no BOOT-5104 --weight L --network NO --category security --description "Determine service manager" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 case ${OS} in "Linux") if [ -f /proc/1/cmdline ]; then FILENAME=`${AWKBINARY} '/(^\/|init)/ { print $1 }' /proc/1/cmdline` LogText "Result: cmdline found = ${FILENAME}" ISFILE=`echo ${FILENAME} | ${GREPBINARY} "^/"` if [ ! "${ISFILE}" = "" ]; then if [ -L ${ISFILE} ]; then ShowSymlinkPath ${ISFILE} FILENAME="${SYMLINK}" elif [ -f ${ISFILE} ]; then FILENAME="${ISFILE}" else LogText "Result: cmdline of PID 1 is not a file" fi fi if [ ! "${FILENAME}" = "" ]; then SHORTNAME=`echo ${FILENAME} | ${AWKBINARY} -F/ '{ print $NF }'` LogText "Found: ${SHORTNAME}" case ${SHORTNAME} in "init") SERVICE_MANAGER="SysV Init" ;; systemd) SERVICE_MANAGER="systemd" ;; upstart) SERVICE_MANAGER="upstart" ;; *) CONTAINS_SYSTEMD=`echo ${SHORTNAME} | ${GREPBINARY} "systemd"` if [ ! "${CONTAINS_SYSTEMD}" = "" ]; then SERVICE_MANAGER="systemd" else LogText "Found ${SHORTNAME}. Unclear what service manager this is" ReportException "${TEST_NO}:001" "Unknown service manager" fi ;; esac else LogText "Result: /proc/1/cmdline seems to be empty" ReportException "${TEST_NO}:002" "No data found in /proc/1/cmdline" fi fi # Continue testing if we didn't find it yet if [ "${SERVICE_MANAGER}" = "unknown" ]; then if [ -f /usr/bin/init-openrc ]; then SERVICE_MANAGER="openrc"; fi fi ;; "DragonFly"|"NetBSD"|"FreeBSD") if [ -x /sbin/init -a -d ${ROOTDIR}etc/rc.d -a -f ${ROOTDIR}etc/rc ]; then SERVICE_MANAGER="bsdrc" fi ;; *) LogText "Result: unknown service manager" esac LogText "Result: service manager found = ${SERVICE_MANAGER}" if [ "${SERVICE_MANAGER}" = "" -o "${SERVICE_MANAGER}" = "unknown" ]; then Display --indent 2 --text "- Service Manager" --result "${STATUS_UNKNOWN}" --color YELLOW else Display --indent 2 --text "- Service Manager" --result "${SERVICE_MANAGER}" --color GREEN fi fi # ################################################################################# # # Test : BOOT-5106 # Description : Check if boot.efi is found on Mac OS X Register --test-no BOOT-5106 --os "MacOS" --weight L --network NO --root-only YES --category security --description "Check EFI boot file on Mac OS X" if [ ${SKIPTEST} -eq 0 ]; then FileExists ${ROOTDIR}System/Library/CoreServices/boot.efi if [ ${FILE_FOUND} -eq 1 ]; then LogText "Result: found Mac OS X boot.efi file" BOOT_LOADER="MacOS-boot-EFI" BOOT_LOADER_FOUND=1 fi fi # ################################################################################# # # Test : BOOT-5108 # Description : Check for Syslinux Register --test-no BOOT-5108 --os "Linux" --weight L --network NO --root-only YES --category security --description "Check Syslinux as bootloader" if [ ${SKIPTEST} -eq 0 ]; then FileExists ${ROOTDIR}boot/syslinux/syslinux.cfg if [ ${FILE_FOUND} -eq 1 ]; then LogText "Result: found Syslinux" BOOT_LOADER="Syslinux" BOOT_LOADER_FOUND=1 fi fi # ################################################################################# # # Test : BOOT-5116 # Description : Check if system is booted in UEFI mode Register --test-no BOOT-5116 --weight L --network NO --root-only YES --category security --description "Check if system is booted in UEFI mode" if [ ${SKIPTEST} -eq 0 ]; then UEFI_TESTS_PERFORMED=0 case ${OS} in Linux) UEFI_TESTS_PERFORMED=1 # Check if UEFI is available in this boot LogText "Test: checking if UEFI is used" if [ -d ${ROOTDIR}sys/firmware/efi ]; then LogText "Result: system booted in UEFI mode" UEFI_BOOTED=1 else LogText "Result: UEFI not used, can't find /sys/firmware/efi directory" fi # Test if Secure Boot is enabled LogText "Test: determine if Secure Boot is used" if [ -d ${ROOTDIR}sys/firmware/efi/efivars ]; then FIND=$(${LSBINARY} ${ROOTDIR}sys/firmware/efi/efivars/SecureBoot-* 2> /dev/null) if [ ! -z "${FIND}" ]; then for FILE in ${FIND}; do LogText "Test: checking file ${FILE}" # TODO: add detection for od J=$(od -An -t u1 ${FILE} | ${AWKBINARY} '{ print $5 }') if [ "${J}" = "1" ]; then LogText "Result: found SecureBoot file with enabled status" UEFI_BOOTED_SECURE=1 else LogText "Result: system not booted with Secure Boot (status 0 in file ${FILE})" fi done fi else LogText "Result: system not booted with Secure Boot (no SecureBoot file found)" fi ;; #MacOS) # TODO: Mac OS ioreg -l -p IODeviceTree | ${GREPBINARY} firmware-abi #;; *) LogText "Result: no test implemented yet to test for UEFI on this platform" ;; esac if [ ${UEFI_BOOTED} -eq 1 ]; then Display --indent 2 --text "- Checking UEFI boot" --result "${STATUS_ENABLED}" --color GREEN if [ ${UEFI_BOOTED_SECURE} -eq 1 ]; then Display --indent 2 --text "- Checking Secure Boot" --result "${STATUS_ENABLED}" --color GREEN else Display --indent 2 --text "- Checking Secure Boot" --result "${STATUS_DISABLED}" --color YELLOW fi else if [ ${UEFI_TESTS_PERFORMED} -eq 1 ]; then Display --indent 2 --text "- Checking UEFI boot" --result "${STATUS_DISABLED}" --color WHITE fi fi fi # ################################################################################# # # Test : BOOT-5121 # Description : Check for GRUB boot loader Register --test-no BOOT-5121 --weight L --network NO --category security --description "Check for GRUB boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 FOUND=0 LogText "Test: Checking for presence GRUB conf file (/boot/grub/grub.conf or /boot/grub/menu.lst)" if [ -f /boot/grub/grub.conf -o -f /boot/grub/menu.lst ]; then FOUND=1 BOOT_LOADER="GRUB" BOOT_LOADER_FOUND=1 GRUB_VERSION=1 Display --indent 2 --text "- Checking presence GRUB" --result "${STATUS_OK}" --color GREEN if [ -f /boot/grub/grub.conf ]; then GRUBCONFFILE="/boot/grub/grub.conf"; else GRUBCONFFILE="/boot/grub/menu.lst"; fi fi # GRUB2 configuration file if [ -f /boot/grub/grub.cfg -o -f /boot/grub2/grub.cfg ]; then FOUND=1 BOOT_LOADER="GRUB2" BOOT_LOADER_FOUND=1 GRUB_VERSION=2 Display --indent 2 --text "- Checking presence GRUB2" --result "${STATUS_FOUND}" --color GREEN if [ -f /boot/grub/grub.cfg ]; then GRUBCONFFILE="/boot/grub/grub.cfg" elif [ -f /boot/grub2/grub.cfg ]; then GRUBCONFFILE="/boot/grub2/grub.cfg" fi LogText "Result: found GRUB2 configuration file (${GRUBCONFFILE})" fi # Some OSes like Gentoo do not have /boot mounted by default # TODO: root directory and rewrite ls statement if [ -d /boot ]; then if [ "`ls /boot/* 2> /dev/null`" = "" -a ! -z "${GRUB2INSTALLBINARY}" ]; then BOOT_LOADER_FOUND=1 LogText "Result: found empty /boot, however with GRUB2 binary installed. Best guess is that GRUB2 is actually installed, but /boot not mounted" Display --indent 2 --text "- Checking presence GRUB2" --result "POSSIBLE MATCH" --color YELLOW ReportManual "${TEST_NO}:01" fi fi if [ ${FOUND} -eq 0 ]; then LogText "Result: no GRUB configuration file found." fi fi # ################################################################################# # # Test : BOOT-5122 # Description : Check for GRUB boot loader configuration if [ ! "${GRUBCONFFILE}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no BOOT-5122 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for GRUB boot password" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 LogText "Found file ${GRUBCONFFILE}, proceeding with tests." FileIsReadable ${GRUBCONFFILE} if [ ${CANREAD} -eq 1 ]; then FIND=$(${GREPBINARY} 'password --md5' ${GRUBCONFFILE} | ${GREPBINARY} -v '^#') FIND2=$(${GREPBINARY} 'password --encrypted' ${GRUBCONFFILE} | ${GREPBINARY} -v '^#') FIND3=$(${GREPBINARY} 'set superusers' ${GRUBCONFFILE} | ${GREPBINARY} -v '^#') FIND4=$(${GREPBINARY} 'password_pbkdf2' ${GRUBCONFFILE} | ${GREPBINARY} -v '^#') FIND5=$(${GREPBINARY} 'grub.pbkdf2' ${GRUBCONFFILE} | ${GREPBINARY} -v '^#') # GRUB1: Password should be set (MD5 or SHA1) if [ ! -z "${FIND}" -o ! -z "${FIND2}" ]; then FOUND=1 # GRUB2: Superusers AND password should be defined elif [ ! -z "${FIND3}" ]; then if [ ! -z "${FIND4}" -o ! -z "${FIND5}" ]; then FOUND=1; fi fi if [ ${FOUND} -eq 1 ]; then Display --indent 4 --text "- Checking for password protection" --result "${STATUS_OK}" --color GREEN LogText "Result: GRUB has password protection." AddHP 4 4 else Display --indent 4 --text "- Checking for password protection" --result "${STATUS_WARNING}" --color RED LogText "Result: Didn't find hashed password line in GRUB boot file!" ReportSuggestion ${TEST_NO} "Set a password on GRUB bootloader to prevent altering boot configuration (e.g. boot in single user mode without password)" AddHP 0 2 fi else LogText "Result: Can not read ${GRUBCONFFILE} (no permission)" fi fi # ################################################################################# # # Test : BOOT-5124 # Description : Check for FreeBSD boot loader Register --test-no BOOT-5124 --os FreeBSD --weight L --network NO --category security --description "Check for FreeBSD boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 if [ -f ${ROOTDIR}boot/boot1 -a -f ${ROOTDIR}boot/boot2 -a -f ${ROOTDIR}boot/loader ]; then LogText "Result: found boot1, boot2 and loader files in ${ROOTDIR}boot" Display --indent 2 --text "- Checking presence FreeBSD loader" --result "${STATUS_FOUND}" --color GREEN BOOT_LOADER="FreeBSD" BOOT_LOADER_FOUND=1 else LogText "Result: Not all expected files found in ${ROOTDIR}boot" fi fi # ################################################################################# # # Test : BOOT-5126 # Description : Check for NetBSD boot loader Register --test-no BOOT-5126 --os NetBSD --weight L --network NO --category security --description "Check for NetBSD boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 if [ -f ${ROOTDIR}boot.${HARDWARE} -o -f ${ROOTDIR}boot -o -f ${ROOTDIR}ofwboot ]; then LogText "Result: found NetBSD secondary bootstrap" Display --indent 2 --text "- Checking presence NetBSD loader" --result "${STATUS_FOUND}" --color GREEN BOOT_LOADER="NetBSD" BOOT_LOADER_FOUND=1 else LogText "Result: NetBSD secondary bootstrap not found" ReportException "${TEST_NO}:1" "No boot loader found on NetBSD" fi fi # ################################################################################# # # Test : BOOT-5139 # Description : Check for LILO boot loader # Notes : password= or password = Register --test-no BOOT-5139 --weight L --network NO --category security --description "Check for LILO boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 LILOCONFFILE="${ROOTDIR}etc/lilo.conf" LogText "Test: checking for presence LILO configuration file" if [ -f ${LILOCONFFILE} ]; then FileIsReadable ${LILOCONFFILE} if [ ${CANREAD} -eq 1 ]; then BOOT_LOADER="LILO" BOOT_LOADER_FOUND=1 Display --indent 2 --text "- Checking presence LILO" --result "${STATUS_OK}" --color GREEN LogText "Checking password option LILO" FIND=$(${EGREPBINARY} 'password[[:space:]]?=' ${LILOCONFFILE} | ${GREPBINARY} -v "^#") if [ -z "${FIND}" ]; then if [ "${MACHINE_ROLE}" = "server" -o "${MACHINE_ROLE}" = "workstation" ]; then Display --indent 4 --text "- Password option presence " --result "${STATUS_WARNING}" --color RED LogText "Result: no password set for LILO. Bootloader is unprotected to dropping to single user mode or unauthorized access to devices/data." ReportSuggestion ${TEST_NO} "Add a password to LILO, by adding a line to the lilo.conf file, above the first line saying 'image=': password=" ReportWarning ${TEST_NO} "No password set on LILO bootloader" AddHP 0 2 elif [ "${MACHINE_ROLE}" = "personal"]; then Display --indent 4 --text "- Password option presence " --result "${STATUS_WARNING}" --color yellow LogText "Result: no password set for LILO. Bootloader is unprotected to dropping to single user mode or unauthorized access to devices/data." ReportSuggestion ${TEST_NO} "No password set on LILO bootloader. Add a password to LILO, by adding a line to the lilo.conf file, above the first line saying 'image=': password=" AddHP 1 2 else LogText "Result: no password set for LILO, with unknown machine role" fi else Display --indent 4 --text "- Password option presence " --result "${STATUS_OK}" --color GREEN LogText "Result: LILO password option set" AddHP 4 4 fi else LogText "Result: can not read ${LILOCONFFILE} (no permission)" fi else LogText "Result: LILO configuration file not found" fi fi # ################################################################################# # # Test : BOOT-5142 # Description : Check for SILO boot loader Register --test-no BOOT-5142 --weight L --network NO --category security --description "Check SPARC Improved boot loader (SILO)" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 if [ -f /etc/silo.conf ]; then LogText "Result: Found SILO configuration file (/etc/silo.conf)" Display --indent 2 --text "- Checking boot loader SILO" --result "${STATUS_FOUND}" --color GREEN BOOT_LOADER="SILO" BOOT_LOADER_FOUND=1 else LogText "Result: no SILO configuration file found." fi fi # ################################################################################# # # Test : BOOT-5155 # Description : Check for YABOOT boot loader Register --test-no BOOT-5155 --weight L --network NO --category security --description "Check for YABOOT boot loader configuration file" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 LogText "Test: Check for /etc/yaboot.conf" if [ -f /etc/yaboot.conf ]; then LogText "Result: Found YABOOT configuration file (/etc/yaboot.conf)" Display --indent 4 --text "- Checking boot loader YABOOT" --result "${STATUS_FOUND}" --color GREEN BOOT_LOADER="YABOOT" BOOT_LOADER_FOUND=1 else LogText "Result: no YABOOT configuration file found." fi fi # ################################################################################# # # Test : BOOT-5159 # Description : Check for OpenBSD boot loader # More info : Only OpenBSD Register --test-no BOOT-5159 --os OpenBSD --weight L --network NO --category security --description "Check for OpenBSD boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then BOOT_LOADER_SEARCHED=1 FOUND=0 # Boot files # /usr/mdec/biosboot: first stage bootstrap # /boot : second stage bootstrap if [ -f ${ROOTDIR}usr/mdec/biosboot -a -f ${ROOTDIR}boot ]; then FOUND=1 fi # Configuration file if [ -f ${ROOTDIR}etc/boot.conf ]; then FOUND=1 Display --indent 2 --text "- Checking ${ROOTDIR}etc/boot.conf" --result "${STATUS_FOUND}" --color GREEN FIND=$(${GREPBINARY} '^boot' ${ROOTDIR}etc/boot.conf) if [ -z "${FIND}" ]; then Display --indent 4 --text "- Checking boot option" --result "${STATUS_WARNING}" --color RED #ReportSuggestion ${TEST_NO} "Add 'boot' to the ${ROOTDIR}etc/boot.conf file to disable the default 5 seconds waiting time, to disallow booting into single user mode." ReportWarning ${TEST_NO} "System can be booted into single user mode without password" else Display --indent 4 --text "- Checking boot option" --result "${STATUS_OK}" --color GREEN LogText "Ok, boot option is enabled." fi else Display --indent 2 --text "- Checking ${ROOTDIR}etc/boot.conf" --result "${STATUS_NOT_FOUND}" --color YELLOW LogText "Result: no ${ROOTDIR}etc/boot.conf found. When using the default boot loader, physical" LogText "access to the server can be used to possibly enter single user mode." ReportSuggestion ${TEST_NO} "Add 'boot' to the ${ROOTDIR}etc/boot.conf file to disable the default 5 seconds waiting time." fi if [ ${FOUND} -eq 1 ]; then LogText "Result: found OpenBSD boot loader" BOOT_LOADER="OpenBSD" BOOT_LOADER_FOUND=1 fi fi # ################################################################################# # if [ ${BOOT_LOADER_FOUND} -eq 0 -a ${BOOT_LOADER_SEARCHED} -eq 1 ]; then # Your boot loader is not detected. Want to help supporting it, see the README # ReportException "BOOTLOADER" "No boot loader found" Display --indent 4 --text "- Boot loader" --result "NONE FOUND" --color YELLOW fi # ################################################################################# # # Test : BOOT-5165 # Description : Check for FreeBSD boot services Register --test-no BOOT-5165 --os FreeBSD --weight L --network NO --category security --description "Check for FreeBSD boot services" if [ ${SKIPTEST} -eq 0 ]; then if [ ! "${SERVICEBINARY}" = "" ]; then # FreeBSD (Ask services(8) for enabled services) LogText "Searching for services at startup (service)" FIND=$(${SERVICEBINARY} -e | ${SEDBINARY} 's|^.*\/||' | ${SORTBINARY}) else # FreeBSD (Read /etc/rc.conf file for enabled services) LogText "Searching for services at startup (rc.conf)" FIND=$(${EGREPBINARY} -v -i '^#|none' /etc/rc.conf | ${EGREPBINARY} -i '_enable.*(yes|on|1)' | ${SORTBINARY} | ${AWKBINARY} -F= '{ print $1 }' | ${SEDBINARY} 's/_enable//') fi N=0 for I in ${FIND}; do LogText "Found service (service/rc.conf): ${I}" Report "boottask[]=${I}" N=$((N + 1)) done Display --indent 2 --text "- Checking services at startup (service/rc.conf)" --result "${STATUS_DONE}" --color GREEN Display --indent 6 --text "Result: found $N services/options set" LogText "Found $N services/options to run at startup" fi # ################################################################################# # # Test : BOOT-5177 # Description : Check for Linux boot services (systemd and chkconfig) # Notes : We skip using chkconfig if systemd is being used. Register --test-no BOOT-5177 --os Linux --weight L --network NO --category security --description "Check for Linux boot and running services" if [ ${SKIPTEST} -eq 0 ]; then CHECKED=0 LogText "Test: checking presence systemctl binary" # Determine if we have systemctl on board if [ ! -z "${SYSTEMCTLBINARY}" ]; then LogText "Result: systemctl binary found, trying that to discover information" # Running services LogText "Searching for running services (systemctl services only)" FIND=$(${SYSTEMCTLBINARY} --full --type=service | ${AWKBINARY} '{ if ($4=="running") { print $1 } }' | ${AWKBINARY} -F. '{ print $1 }') N=0 Report "running_service_tool=systemctl" for I in ${FIND}; do LogText "Found running service: ${I}" Report "running_service[]=${I}" N=$((N + 1)) done LogText "Note: Run systemctl --full --type=service to see all services" Display --indent 2 --text "- Check running services (systemctl)" --result "${STATUS_DONE}" --color GREEN Display --indent 8 --text "Result: found $N running services" LogText "Result: Found $N enabled services" # Services at boot LogText "Searching for enabled services (systemctl services only)" FIND=$(${SYSTEMCTLBINARY} list-unit-files --type=service | ${AWKBINARY} '{ if ($2=="enabled") { print $1 } }' | ${AWKBINARY} -F. '{ print $1 }') N=0 Report "boot_service_tool=systemctl" for I in ${FIND}; do LogText "Found enabled service at boot: ${I}" Report "boot_service[]=${I}" N=$((N + 1)) done LogText "Note: Run systemctl list-unit-files --type=service to see all services" Display --indent 2 --text "- Check enabled services at boot (systemctl)" --result "${STATUS_DONE}" --color GREEN Display --indent 8 --text "Result: found $N enabled services" LogText "Result: Found $N running services" else LogText "Result: systemctl binary not found, checking chkconfig binary" if [ ! -z "${CHKCONFIGBINARY}" ]; then LogText "Result: chkconfig binary found, trying that to discover information" LogText "Searching for services at startup (chkconfig, runlevel 3 and 5)" FIND=$(${CHKCONFIGBINARY} --list | ${EGREPBINARY} '3:on|5:on' | ${AWKBINARY} '{ print $1 }') N=0 Report "boot_service_tool=chkconfig" for I in ${FIND}; do LogText "Found service (at boot, runlevel 3 or 5): ${I}" Report "boot_service[]=${I}" N=$((N + 1)) done LogText "Hint: Run chkconfig --list to see all services and disable unneeded services" Display --indent 2 --text "- Check services at startup (chkconfig)" --result "${STATUS_DONE}" --color GREEN Display --indent 8 --text "Result: found $N services" LogText "Result: Found $N services at startup" else LogText "Result: both systemctl and chkconfig not found. Skipping this test" fi fi fi # ################################################################################# # # Test : BOOT-5180 # Description : Check for Linux boot services (Debian style) # Notes : Debian 8+ shows runlevel 5 if [ "${LINUX_VERSION}" = "Debian" -o "${LINUX_VERSION}" = "Ubuntu" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no BOOT-5180 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for Linux boot services (Debian style)" if [ ${SKIPTEST} -eq 0 ]; then # Runlevel check sRUNLEVEL=$(${RUNLEVELBINARY} | ${GREPBINARY} "N [0-9]" | ${AWKBINARY} '{ print $2} ') LogText "Result: found runlevel ${sRUNLEVEL}" if [ "${sRUNLEVEL}" = "2" ]; then LogText "Result: performing find in /etc/rc2.d as runlevel 2 is found" FIND=$(${FINDBINARY} ${ROOTDIR}etc/rc2.d -type l -print | ${CUTBINARY} -d '/' -f4 | ${SEDBINARY} "s/S[0-9][0-9]//g" | sort) if [ ! "${FIND}" = "" ]; then N=0 for SERVICE in ${FIND}; do LogText "Found service (at boot, runlevel 2): ${SERVICE}" N=$((N + 1)) done Display --indent 2 --text "- Check services at startup (rc2.d)" --result "${STATUS_DONE}" --color WHITE Display --indent 4 --text "Result: found $N services" LogText "Result: found $N services" fi elif [ -z "${sRUNLEVEL}" ]; then ReportSuggestion ${TEST_NO} "Determine runlevel and services at startup" else LogText "Result: skipping further actions" fi fi # ################################################################################# # # Test : BOOT-5184 # Description : Check world writable startup scripts Register --test-no BOOT-5184 --os Linux --weight L --network NO --category security --description "Check permissions for boot files/scripts" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 CHECKDIRS="${ROOTDIR}etc/init.d ${ROOTDIR}etc/rc.d ${ROOTDIR}etc/rcS.d" LogText "Result: checking /etc/init.d scripts for writable bit" for I in ${CHECKDIRS}; do LogText "Test: checking if directory ${I} exists" if [ -d ${I} ]; then LogText "Result: directory ${I} found" LogText "Test: checking for available files in directory" FIND=$(${FINDBINARY} ${I} -type f -print) if [ ! -z "${FIND}" ]; then LogText "Result: found files in directory, checking permissions now" for J in ${FIND}; do LogText "Test: checking permissions of file ${J}" if IsWorldWritable ${J}; then FOUND=1 LogText "Result: warning, file ${J} is world writable" else LogText "Result: good, file ${J} not world writable" fi done else LogText "Result: found no files in directory." fi else LogText "Result: directory ${I} not found. Skipping.." fi done # /etc/rc[0-6].d for NO in 0 1 2 3 4 5 6; do LogText "Test: Checking /etc/rc${NO}.d scripts for writable bit" if [ -d ${ROOTDIR}etc/rc${NO}.d ]; then FIND=$(${FINDBINARY} ${ROOTDIR}etc/rc${NO}.d -type f -print) for I in ${FIND}; do if IsWorldWritable ${I}; then FOUND=1 LogText "Result: warning, file ${I} is world writable" else LogText "Result: good, file ${I} not world writable" fi done fi done # Other files CHECKFILES="${ROOTDIR}etc/rc ${ROOTDIR}etc/rc.local ${ROOTDIR}etc/rc.d/rc.sysinit" for I in ${CHECKFILES}; do if [ -f ${I} ]; then ShowSymlinkPath "${I}" if [ ${FOUNDPATH} -eq 1 ]; then CHECKFILE="${SYMLINK}" LogText "Result: found the path behind this symlink (${CHECKFILE} --> ${I})" else CHECKFILE="${I}" fi LogText "Test: Checking ${CHECKFILE} file for writable bit" if IsWorldWritable ${CHECKFILE}; then FOUND=1 ReportWarning ${TEST_NO} "Found writable startup script ${CHECKFILE}" LogText "Result: warning, file ${CHECKFILE} is world writable" else LogText "Result: good, file ${CHECKFILE} not world writable" fi fi done # Check results if [ ${FOUND} -eq 1 ]; then Display --indent 2 --text "- Check startup files (permissions)" --result "${STATUS_WARNING}" --color RED ReportWarning ${TEST_NO} "Found world writable startup scripts" "-" "-" LogText "Result: found one or more scripts which are possibly writable by other users" AddHP 0 3 else Display --indent 2 --text "- Check startup files (permissions)" --result "${STATUS_OK}" --color GREEN AddHP 3 3 fi fi # ################################################################################# # # Test : BOOT-5202 # Description : Check uptime of system Register --test-no BOOT-5202 --weight L --network NO --category security --description "Check uptime of system" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 FIND="" UPTIME_IN_SECS="" case "${OS}" in Linux) # Idle time, not real uptime if [ -f /proc/uptime ]; then UPTIME_IN_SECS=$(cat /proc/uptime | ${CUTBINARY} -d ' ' -f1 | ${CUTBINARY} -d '.' -f1) else Display --indent 2 --text "- Checking uptime" --result "${STATUS_SKIPPED}" --color YELLOW ReportException "${TEST_NO}:1" "No uptime test available for this operating system (/proc/uptime missing)" fi ;; DragonFly | FreeBSD | MacOS) if [ ! -z "${SYSCTLBINARY}" ]; then TIME_BOOT=$(${SYSCTLBINARY} kern.boottime | ${AWKBINARY} '{ print $5 }' | ${SEDBINARY} -e 's/,//' | ${GREPBINARY} "[0-9]") TIME_NOW=$(date "+%s") LogText "Boot time: ${TIME_BOOT}" LogText "Current time: ${TIME_NOW}" if [ ! -z "${TIME_BOOT}" -a ! -z "${TIME_NOW}" ]; then UPTIME_IN_SECS=$((TIME_NOW - TIME_BOOT)) else ReportException "${TEST_NO}:5" "Most likely kern.boottime empty, unable to determine uptime" fi else Display --indent 2 --text "- Checking uptime" --result "${STATUS_SKIPPED}" --color YELLOW ReportException "${TEST_NO}:4" "No uptime test available for this operating system (sysctl missing)" fi ;; NetBSD | OpenBSD) if [ ! -z "${SYSCTLBINARY}" ]; then TIME_BOOT=$(${SYSCTLBINARY} -n kern.boottime) TIME_NOW=$(date "+%s") LogText "Boot time: ${TIME_BOOT}" LogText "Current time: ${TIME_NOW}" if [ ! -z "${TIME_BOOT}" -a ! -z "${TIME_NOW}" ]; then UPTIME_IN_SECS=$((TIME_NOW - TIME_BOOT)) else ReportException "${TEST_NO}:5" "Most likely kern.boottime empty, unable to determine uptime" fi else Display --indent 2 --text "- Checking uptime" --result "${STATUS_SKIPPED}" --color YELLOW ReportException "${TEST_NO}:4" "No uptime test available for this operating system (sysctl missing)" fi ;; Solaris) if [ ! -z "${KSTATBINARY}" ]; then UPTIME_IN_SECS=$(${KSTATBINARY} -p unix:0:system_misc:snaptime | ${GREPBINARY} "^unix" | ${AWKBINARY} '{print $2}' | ${CUTBINARY} -d "." -f1) else Display --indent 2 --text "- Checking uptime" --result "${STATUS_SKIPPED}" --color YELLOW ReportException "${TEST_NO}:2" "No uptime test available for this operating system (kstat missing)" fi ;; *) Display --indent 2 --text "- Checking uptime" --result "${STATUS_SKIPPED}" --color YELLOW # Want to help improving Lynis? Share your operating system and a way to determine the uptime (in seconds) ReportException "${TEST_NO}:3" "No uptime test available yet for this operating system" ;; esac if [ ! -z "${UPTIME_IN_SECS}" ]; then UPTIME_IN_DAYS=$((UPTIME_IN_SECS / 60 / 60 / 24)) LogText "Uptime (in seconds): ${UPTIME_IN_SECS}" LogText "Uptime (in days): ${UPTIME_IN_DAYS}" Report "uptime_in_seconds=${UPTIME_IN_SECS}" Report "uptime_in_days=${UPTIME_IN_DAYS}" else LogText "Result: no uptime information available" fi fi # ################################################################################# # # Test : BOOT-5260 # Description : Check single user mode for systemd Register --test-no BOOT-5260 --weight L --network NO --category security --description "Check single user mode for systemd" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Searching /usr/lib/systemd/system/rescue.service" if [ -f ${ROOTDIR}usr/lib/systemd/system/rescue.service ]; then LogText "Result: file /usr/lib/systemd/system/rescue.service" LogText "Test: checking presence sulogin for single user mode" FIND=$(${EGREPBINARY} "^ExecStart=-(/bin/sh -c \")?(/usr)?/(s)?bin/sulogin" ${ROOTDIR}usr/lib/systemd/system/rescue.service) if [ ! -z "${FIND}" ]; then FOUND=1 LogText "Result: found sulogin, so single user is protected" AddHP 3 3 else LogText "Result: did not find sulogin in rescue.service" AddHP 1 3 Display --indent 2 --text "- Checking sulogin in rescue.service" --result "${STATUS_NOT_FOUND}" --color YELLOW ReportSuggestion "${TEST_NO}" "Protect rescue.service by using sulogin" fi else LogText "Result: file ${ROOTDIR}usr/lib/systemd/system/rescue.service does not exist" fi fi # ################################################################################# # Report "boot_loader=${BOOT_LOADER}" Report "boot_uefi_booted=${UEFI_BOOTED}" Report "boot_uefi_booted_secure=${UEFI_BOOTED_SECURE}" Report "service_manager=${SERVICE_MANAGER}" WaitForKeyPress # #================================================================================ # Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com