#!/bin/sh ################################################################################# # # Lynis # ------------------ # # Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands # Web site: http://www.rootkit.nl # # 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" # ################################################################################# # Display --indent 2 --text "- Checking boot loaders" BOOT_LOADER="Unknown" BOOT_LOADER_FOUND=0 GRUB_VERSION=0 # ################################################################################# # # Test : BOOT-5121 # Description : Check for GRUB boot loader Register --test-no BOOT-5121 --weight L --network NO --description "Check for GRUB boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 logtext "Test: Checking for presence GRUB conf file (/boot/grub/grub.conf or /boot/grub/menu.lst)" if [ -f /boot/grub/grub.conf -o -f /boot/grub/menu.lst ]; then FOUND=1 BOOT_LOADER="GRUB" BOOT_LOADER_FOUND=1 GRUB_VERSION=1 Display --indent 4 --text "- Checking presence GRUB" --result "OK" --color GREEN if [ -f /boot/grub/grub.conf ]; then GRUBCONFFILE="/boot/grub/grub.conf"; else GRUBCONFFILE="/boot/grub/menu.lst"; fi fi # GRUB2 configuration file if [ -f /boot/grub/grub.cfg ]; then FOUND=1 BOOT_LOADER="GRUB2" BOOT_LOADER_FOUND=1 GRUB_VERSION=2 GRUBCONFFILE="/boot/grub/grub.cfg" Display --indent 4 --text "- Checking presence GRUB2" --result FOUND --color GREEN logtext "Result: found GRUB2 configuration file (/boot/grub/grub.cfg)" # YYY password check, when documentation of GRUB2 project is improved # YYY Add check permission check (600) fi # Some OSes like Gentoo do not have /boot mounted by default if [ -d /boot ]; then if [ "`ls /boot/* 2> /dev/null`" = "" -a ! "${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 4 --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 --description "Check for GRUB boot password" if [ ${SKIPTEST} -eq 0 ]; then logtext "Found file ${GRUBCONFFILE}, proceeding with tests." FileIsReadable ${GRUBCONFFILE} if [ ${CANREAD} -eq 1 ]; then FIND=`cat ${GRUBCONFFILE} | grep 'password --md5' | grep -v '^#'` FIND2=`cat ${GRUBCONFFILE} | grep 'password --encrypted' | grep -v '^#'` if [ "${FIND}" = "" -a "${FIND2}" = "" ]; then Display --indent 6 --text "- Checking for password protection" --result WARNING --color RED logtext "Result: Didn't find MD5/SHA1 hashed password line in GRUB boot file!" logtext "Risk: user can switch to single user mode by editing current menu items or bypassing them." logtext "Additional information: Do NOT use a plaintext password, since the grub.conf or menu.lst file is most likely to be world readable!" logtext "If an unsecured OS like DOS is used, add 'lock' below that entry and setup a password with the password option, to prevent direct system access." ReportSuggestion ${TEST_NO} "Set a password on GRUB bootloader to prevent altering boot configuration (e.g. boot in single user mode without password)" logtext "Tip: Run grub-crypt or grub-md5-crypt and create a hashed password. Add a line below the line timeout=, add: password --md5 or password --encrypted for SHA1 encrypted password" AddHP 0 2 else Display --indent 6 --text "- Checking for password protection" --result OK --color GREEN logtext "Result: GRUB has password protection." AddHP 4 4 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 --description "Check for FreeBSD boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then if [ -f /boot/boot1 -a -f /boot/boot2 -a -f /boot/loader ]; then logtext "Result: found boot1, boot2 and loader files in /boot" Display --indent 4 --text "- Checking presence FreeBSD loader" --result FOUND --color GREEN BOOT_LOADER="FreeBSD" BOOT_LOADER_FOUND=1 else logtext "Result: Not all expected files found in /boot" fi fi # ################################################################################# # # Test : BOOT-5126 # Description : Check for NetBSD boot loader Register --test-no BOOT-5126 --os NetBSD --weight L --network NO --description "Check for NetBSD boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then if [ -f /boot.${HARDWARE} -o -f /boot -o -f /ofwboot ]; then logtext "Result: found NetBSD secondary bootstrap" Display --indent 4 --text "- Checking presence NetBSD loader" --result 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 --description "Check for LILO boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then LILOCONFFILE="/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 4 --text "- Checking presence LILO" --result "OK" --color GREEN logtext "Checking password option LILO" FIND=`cat ${LILOCONFFILE} | ${EGREPBINARY} 'password[[:space:]]?=' | grep -v "^#"` if [ "${FIND}" = "" ]; then Display --indent 6 --text "- Password option presence " --result "WARNING" --color RED logtext "Result: no password set for LILO. Bootloader is unprotected to" logtext "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} "M" "No password set on LILO bootloader" AddHP 0 2 else Display --indent 6 --text "- Password option presence " --result "OK" --color GREEN logtext "Result: LILO password option set" AddHP 4 4 fi #YYY (making /etc/lilo.conf immutable is a good idea, chattr +i /etc/lilo.conf) 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 --description "Check SPARC Improved boot loader (SILO)" if [ ${SKIPTEST} -eq 0 ]; then if [ -f /etc/silo.conf ]; then logtext "Result: Found SILO configuration file (/etc/silo.conf)" Display --indent 4 --text "- Checking boot loader SILO" --result FOUND --color GREEN BOOT_LOADER="SILO" BOOT_LOADER_FOUND=1 else logtext "Result: no SILO configuration file found." fi fi # ################################################################################# # # Test : BOOT-5144 # Description : Check for SILO boot loader consistency # Notes : To be tested on Gentoo # Register --test-no BOOT-5144 --weight L --network NO --description "Check SPARC Improved boot loader (SILO)" # if [ ${SKIPTEST} -eq 0 ]; then # if [ -f /etc/silo.conf -a -x /sbin/silo ]; then # FIND=`/sbin/silo | grep "appears to be valid"` # if [ ! "${FIND}" = "" ]; then # logtext "Result: Found SILO configuration file (/etc/silo.conf)" # Display --indent 6 --text "- Checking SILO consistency" --result OK --color GREEN # else # logtext "Result: no positive result received from silo binary" # ReportWarning ${TEST_NO} "Possible issue with boot loader (SILO)" # Display --indent 6 --text "- Checking SILO consistency" --result WARNING --color RED # fi # fi # fi # ################################################################################# # # Test : BOOT-5155 # Description : Check for YABOOT boot loader Register --test-no BOOT-5155 --weight L --network NO --description "Check for YABOOT boot loader configuration file" if [ ${SKIPTEST} -eq 0 ]; then 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 FOUND --color GREEN #YYY add permission check 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 && i386 platform Register --test-no BOOT-5159 --os OpenBSD --platform i386 --weight L --network NO --description "Check for OpenBSD i386 boot loader presence" if [ ${SKIPTEST} -eq 0 ]; then if [ -f /etc/boot.conf ]; then BOOT_LOADER="OpenBSD" BOOT_LOADER_FOUND=1 Display --indent 2 --text "- Checking /etc/boot.conf" --result "FOUND" --color GREEN FIND=`grep '^boot' /etc/boot.conf` if [ "${FIND}" = "" ]; then Display --indent 4 --text "- Checking boot option" --result WARNING --color RED #ReportSuggestion ${TEST_NO} "Add 'boot' to the /etc/boot.conf file to disable the default 5 seconds waiting time, to disallow booting into single user mode." ReportWarning ${TEST_NO} "M" "System can be booted into single user mode without password" else Display --indent 4 --text "- Checking boot option" --result OK --color GREEN logtext "Ok, boot option is enabled." fi else Display --indent 2 --text "- Checking /etc/boot.conf" --result "NOT FOUND" --color YELLOW logtext "Result: no /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 /etc/boot.conf file to disable the default 5 seconds waiting time." fi fi # ################################################################################# # if [ ${BOOT_LOADER_FOUND} -eq 0 ]; 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 RED fi # ################################################################################# # # Test : BOOT-5165 # Description : Check for FreeBSD boot services Register --test-no BOOT-5165 --os FreeBSD --weight L --network NO --description "Check for FreeBSD boot services" if [ ${SKIPTEST} -eq 0 ]; then # FreeBSD (Read /etc/rc.conf file for enabled services) logtext "Searching for services at startup (rc.conf)" FIND=`egrep -v -i '^#|none' /etc/rc.conf | egrep -i '_enable.*(yes|on|1)' | sort | awk -F= '{ print $1 }' | sed 's/_enable//'` N=0 for I in ${FIND}; do logtext "Found service (rc.conf): ${I}" report "boottask[]=${I}" N=`expr ${N} + 1` done Display --indent 2 --text "- Checking services at startup (rc.conf)" --result "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-5166 # Description : Check for /etc/rc.local file (and contents) # ################################################################################# # # 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 --description "Check for Linux boot and running services" if [ ${SKIPTEST} -eq 0 ]; then CHECKED=0 logtext "Test: checking presence systemctl binary" # Determine if we have systemctl on board if [ ! "${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 | awk '{ if ($4=="running") { print $1 } }' | awk -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=`expr ${N} + 1` done logtext "Note: Run systemctl --full --type=service to see all services" Display --indent 2 --text "- Check running services (systemctl)" --result "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 | awk '{ if ($2=="enabled") { print $1 } }' | awk -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=`expr ${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 "DONE" --color GREEN Display --indent 8 --text "Result: found $N enabled services" logtext "Result: Found $N running services" else logtext "Result: systemctl binary not found, checking chkconfig binary" if [ ! "${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 | egrep '3:on|5:on' | awk '{ 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=`expr ${N} + 1` done logtext "Suggestion: Run chkconfig --list to see all services and disable unneeded services" Display --indent 2 --text "- Check services at startup (chkconfig)" --result "DONE" --color GREEN Display --indent 8 --text "Result: found $N services" logtext "Result: Found $N services at startup" else logtext "Result: both systemctl and chkconfig not found. Skipping this test" fi fi fi # ################################################################################# # # Test : BOOT-5178 # Description : Check for Linux boot services (Red Hat style) # if [ ! "${CHKCONFIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi # Register --test-no BOOT-5178 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for unneeded Linux boot services (Red Hat style)" # if [ ${SKIPTEST} -eq 0 ]; then # N=0 # N=`expr ${N} + 1` #* mctrans (if selinux is NOT enabled) #* restorecond (if selinux is NOT enabled) --> and is it really needed? # # if profile is server, warn if found: #* pcscd (if profile=server) #* avahi-daemon # Redhat: /etc/sysconfig/network # check if NOZEROCONF=yes is available # #* xfs (if /usr/bin/startx is not found) # #if [ ! -f /etc/mdadm.conf -a ! -f /etc/mdadm/mdadm.conf ]; then #* mdmonitor # # #* firstboot # Display warning if [ ! -f /etc/reconfigSys ] # AND "RUN_FIRSTBOOT=YES" is NOT in /etc/sysconfig/firstboot # #* acpid # Display warning if no modules are loaded (lsmod | grep -i acpi) # # # fi # ################################################################################# # # Test : BOOT-5180 # Description : Check for Linux boot services (Debian style) if [ "${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 --description "Check for Linux boot services (Debian style)" if [ ${SKIPTEST} -eq 0 ]; then # YYY runlevel check sRUNLEVEL=`${RUNLEVELBINARY} | grep "N 2"` if [ ! "${sRUNLEVEL}" = "" ]; then FIND=`find /etc/rc2.d -type l -print | cut -d '/' -f4 | sed "s/S[0-9][0-9]//g" | sort` if [ ! "${FIND}" = "" ]; then N=0 for I in ${FIND}; do logtext "Found service (at boot, runlevel 2): ${I}" N=`expr ${N} + 1` done Display --indent 2 --text "- Check services at startup (rc2.d)" --result "DONE" --color WHITE Display --indent 4 --text "Result: found $N services" logtext "Found $N services" fi else ReportSuggestion ${TEST_NO} "Determine runlevel and services at startup" fi fi # ################################################################################# # # Test : BOOT-5184 # Description : Check world writable startup scripts Register --test-no BOOT-5184 --os Linux --weight L --network NO --description "Check permissions for boot files/scripts" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 CHECKDIRS="/etc/init.d /etc/rc.d /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=`find ${I} -type f -print` if [ ! "${FIND}" = "" ]; then logtext "Result: found files in directory, checking permissions now" for J in ${FIND}; do logtext "Test: checking permissions of file ${J}" IsWorldWritable ${J} if [ "${FileIsWorldWritable}" = "TRUE" ]; then logtext "Result: warning, file ${J} is world writable" FOUND=1 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 /etc/rc${NO}.d ]; then FIND=`find /etc/rc${NO}.d -type f -print` for I in ${FIND}; do IsWorldWritable ${I} if [ "${FileIsWorldWritable}" = "TRUE" ]; then logtext "Result: warning, file ${I} is world writable" FOUND=1 else logtext "Result: good, file ${I} not world writable" fi done fi done # Other files CHECKFILES="/etc/rc /etc/rc.local /etc/rc.d/rc.sysinit" for I in ${CHECKFILES}; do if [ -f ${I} ]; then logtext "Test: Checking ${I} file for writable bit" IsWorldWritable ${I} if [ "${FileIsWorldWritable}" = "TRUE" ]; then ReportWarning ${TEST_NO} "H" "Found writable startup script ${I}" FOUND=1 logtext "Result: warning, file ${I} is world writable" else logtext "Result: good, file ${I} not world writable" fi fi done # Check results if [ ${FOUND} -eq 1 ]; then Display --indent 2 --text "- Check startup files (permissions)" --result "WARNING" --color RED ReportWarning ${TEST_NO} "H" "One or more startup files can be overwritten by all users" ReportSuggestion ${TEST_NO} "Check startup scripts for world write access and change permissions if needed" 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 "OK" --color GREEN AddHP 3 3 fi fi # ################################################################################# # # Add autostart services, like from KDE/Gnome # Test : BOOT-5102 # Description : Check for tasks which are autostarted via /etc/inittab #Register --test-no BOOT-5102 --weight L --network NO --description "Check inittab for services" #if [ ${SKIPTEST} -eq 0 ]; then #fi #YYY check against static list? # ################################################################################# # # Test : BOOT-5202 # Description : Check uptime of system Register --test-no BOOT-5202 --weight L --network NO --description "Check uptime of system" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 FIND="" case "${OS}" in Linux) # Idle time, not real uptime if [ -f /proc/uptime ]; then FIND=`cat /proc/uptime | cut -d ' ' -f1 | cut -d '.' -f1` else Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW ReportException "${TEST_NO}:1" "No uptime test available for this operating system (/proc/uptime missing)" fi ;; MacOS) if [ ! "${SYSCTLBINARY}" = "" ]; then FIND=`${SYSCTLBINARY} kern.boottime | awk '{ print $5 }' | sed -e 's/,//'` else Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW ReportException "${TEST_NO}:3" "No uptime test available for this operating system (sysctl missing)" fi ;; Solaris) if [ ! "${KSTATBINARY}" = "" ]; then FIND=`${KSTATBINARY} -p unix:0:system_misc:snaptime | grep "^unix" | awk '{print $2}' | cut -d "." -f1` else Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW ReportException "${TEST_NO}:2" "No uptime test available for this operating system (kstat missing)" fi ;; *) Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW # Want to help improving Lynis? Share your operating system and a way to determine the uptime (in seconds) ReportException "${TEST_NO}:3" "No uptime test available yet for this operating system" ;; esac if [ ! "${FIND}" = "" ]; then UPTIME_IN_SECS="${FIND}" UPTIME_IN_DAYS=`expr ${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=${UPTIME_IN_DAYS}" else logtext "Result: no uptime information available" fi fi # ################################################################################# # report "boot_loader=${BOOT_LOADER}" wait_for_keypress # #================================================================================ # Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands