#!/bin/sh ################################################################################# # # Lynis # ------------------ # # Copyright 2007-2013, Michael Boelen # Copyright 2007-2018, 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. # ################################################################################# # # Software: PHP # ################################################################################# # # Variables PHPVERSION="" InsertSection "PHP" # Possible locations of php.ini PHPINILOCS="${ROOTDIR}etc/php.ini ${ROOTDIR}etc/php.ini.default \ ${ROOTDIR}etc/php/php.ini ${ROOTDIR}etc/php5.5/php.ini ${ROOTDIR}etc/php5.6/php.ini ${ROOTDIR}etc/php7.0/php.ini ${ROOTDIR}etc/php7.1/php.ini ${ROOTDIR}etc/php7.2/php.ini \ ${ROOTDIR}etc/php/cgi-php5/php.ini ${ROOTDIR}etc/php/cli-php5/php.ini ${ROOTDIR}etc/php/apache2-php5/php.ini \ ${ROOTDIR}etc/php/apache2-php5.5/php.ini ${ROOTDIR}etc/php/apache2-php5.6/php.ini ${ROOTDIR}etc/php/apache2-php7.0/php.ini ${ROOTDIR}etc/php/apache2-php7.1/php.ini \ ${ROOTDIR}etc/php/cgi-php7.1/php.ini ${ROOTDIR}etc/php/apache2-php7.1/php.ini ${ROOTDIR}etc/php/cgi-php5.5/php.ini ${ROOTDIR}etc/php/cgi-php5.6/php.ini ${ROOTDIR}etc/php/cgi-php7.0/php.ini \ ${ROOTDIR}etc/php/cli-php7.1/php.ini ${ROOTDIR}etc/php/cli-php5.5/php.ini ${ROOTDIR}etc/php/cli-php5.6/php.ini ${ROOTDIR}etc/php/cli-php7.0/php.ini \ ${ROOTDIR}etc/php/embed-php7.1/php.ini ${ROOTDIR}etc/php/embed-php5.5/php.ini ${ROOTDIR}etc/php/embed-php5.6/php.ini ${ROOTDIR}etc/php/embed-php7.0/php.ini \ ${ROOTDIR}etc/php/fpm-php7.1/php.ini ${ROOTDIR}etc/php/fpm-php5.5/php.ini ${ROOTDIR}etc/php/fpm-php5.6/php.ini ${ROOTDIR}etc/php/fpm-php7.0/php.ini \ ${ROOTDIR}etc/php5/cgi/php.ini \ ${ROOTDIR}etc/php5/cli/php.ini \ ${ROOTDIR}etc/php5/cli-php5.4/php.ini ${ROOTDIR}etc/php5/cli-php5.5/php.ini ${ROOTDIR}etc/php5/cli-php5.6/php.ini \ ${ROOTDIR}etc/php5/apache2/php.ini \ ${ROOTDIR}etc/php5/fpm/php.ini \ ${ROOTDIR}private/etc/php.ini \ ${ROOTDIR}etc/php/7.2/cli/php.ini ${ROOTDIR}etc/php/7.2/fpm/php.ini \ ${ROOTDIR}etc/php/7.1/cli/php.ini ${ROOTDIR}etc/php/7.1/fpm/php.ini \ ${ROOTDIR}etc/php/7.0/cli/php.ini ${ROOTDIR}etc/php/7.0/fpm/php.ini \ ${ROOTDIR}var/www/conf/php.ini \ ${ROOTDIR}usr/local/etc/php.ini ${ROOTDIR}usr/local/lib/php.ini \ ${ROOTDIR}usr/local/etc/php5/cgi/php.ini \ ${ROOTDIR}usr/local/php54/lib/php.ini \ ${ROOTDIR}usr/local/php56/lib/php.ini \ ${ROOTDIR}usr/local/php70/lib/php.ini \ ${ROOTDIR}usr/local/php71/lib/php.ini \ ${ROOTDIR}usr/local/zend/etc/php.ini \ ${ROOTDIR}usr/pkg/etc/php.ini \ ${ROOTDIR}opt/cpanel/ea-php54/root/etc/php.ini \ ${ROOTDIR}opt/cpanel/ea-php55/root/etc/php.ini \ ${ROOTDIR}opt/cpanel/ea-php56/root/etc/php.ini \ ${ROOTDIR}opt/cpanel/ea-php70/root/etc/php.ini \ ${ROOTDIR}opt/cpanel/ea-php71/root/etc/php.ini \ ${ROOTDIR}opt/alt/php44/etc/php.ini \ ${ROOTDIR}opt/alt/php51/etc/php.ini \ ${ROOTDIR}opt/alt/php52/etc/php.ini \ ${ROOTDIR}opt/alt/php53/etc/php.ini \ ${ROOTDIR}opt/alt/php54/etc/php.ini \ ${ROOTDIR}opt/alt/php55/etc/php.ini \ ${ROOTDIR}opt/alt/php56/etc/php.ini \ ${ROOTDIR}opt/alt/php70/etc/php.ini \ ${ROOTDIR}opt/alt/php71/etc/php.ini \ ${ROOTDIR}etc/opt/remi/php56/php.ini \ ${ROOTDIR}etc/opt/remi/php70/php.ini \ ${ROOTDIR}etc/opt/remi/php71/php.ini \ ${ROOTDIR}etc/opt/remi/php72/php.ini" PHPINIDIRS="${ROOTDIR}etc/php5/conf.d \ ${ROOTDIR}etc/php/7.0/cli/conf.d \ ${ROOTDIR}etc/php/7.1/cli/conf.d \ ${ROOTDIR}etc/php/7.2/cli/conf.d \ ${ROOTDIR}etc/php/7.0/fpm/conf.d \ ${ROOTDIR}etc/php/7.1/fpm/conf.d \ ${ROOTDIR}etc/php/7.2/fpm/conf.d \ ${ROOTDIR}etc/php.d \ ${ROOTDIR}opt/cpanel/ea-php54/root/etc/php.d ${ROOTDIR}opt/cpanel/ea-php55/root/etc/php.d ${ROOTDIR}opt/cpanel/ea-php56/root/etc/php.d ${ROOTDIR}opt/cpanel/ea-php70/root/etc/php.d \ ${ROOTDIR}opt/cpanel/ea-php71/root/etc/php.d \ ${ROOTDIR}opt/alt/php44/etc/php.d.all \ ${ROOTDIR}opt/alt/php51/etc/php.d.all \ ${ROOTDIR}opt/alt/php52/etc/php.d.all \ ${ROOTDIR}opt/alt/php53/etc/php.d.all \ ${ROOTDIR}opt/alt/php54/etc/php.d.all \ ${ROOTDIR}opt/alt/php55/etc/php.d.all \ ${ROOTDIR}opt/alt/php56/etc/php.d.all \ ${ROOTDIR}opt/alt/php70/etc/php.d.all \ ${ROOTDIR}opt/alt/php71/etc/php.d.all" # ################################################################################# # # Test : PHP-2211 # Description : Check php.ini presence Register --test-no PHP-2211 --weight L --network NO --category security --description "Check php.ini presence" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking for presence php.ini" PHPINIFILE="" PHPINI_ALLFILES="" for FILE in ${PHPINILOCS}; do LogText "Test: checking presence ${FILE}" if [ -f ${FILE} ]; then PHPINIFILE="${FILE}" LogText "Result: Found php.ini file (${PHPINIFILE})" LogText "Note: Adding file to php.ini array" PHPINI_ALLFILES="${PHPINI_ALLFILES} ${PHPINIFILE}" else LogText "Result: file ${FILE} not found" fi done # Check all known locations for DIR in ${PHPINIDIRS}; do FIND=$(ls ${DIR}/*.ini 2> /dev/null) if [ -z "${FIND}" ]; then LogText "Result: no files found for ${DIR}" else LogText "Result: found files in location ${DIR}, checking" for FILE in ${FIND}; do if [ -f ${FILE} ]; then LogText "Result: file ${FILE} exists, adding to php.ini array" PHPINI_ALLFILES="${PHPINI_ALLFILES} ${FILE}" fi done fi done if [ ! -z "${PHPINIFILE}" ]; then Display --indent 2 --text "- Checking PHP" --result "${STATUS_FOUND}" --color GREEN LogText "Result: using single file ${PHPINIFILE} for main php.ini tests" LogText "Result: using php.ini array ${PHPINI_ALLFILES} for further tests" else Display --indent 2 --text "- Checking PHP" --result "${STATUS_NOT_FOUND}" --color WHITE LogText "Result: no php.ini file found" fi unset DIR; unset FILE; unset FIND fi # ################################################################################# # # Test : PHP-2320 # Description : Check php disable functions option if [ ! -z "${PHPINI_ALLFILES}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no PHP-2320 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP disabled functions" if [ ${SKIPTEST} -eq 0 ]; then FOUND=0 for I in ${PHPINI_ALLFILES}; do LogText "Test: Checking for PHP function hardening disabled_functions or suhosin.executor.func.blacklist in file ${I}" FIND=$(${GREPBINARY} "^disable_functions.*=" ${I}) if [ -z "${FIND}" ]; then LogText "Result: ${I}: disabled_functions not found" else LogText "Result: ${I}: found disabled_functions" FOUND=1 fi FIND=$(${GREPBINARY} "^suhosin.executor.func.blacklist=" ${I}) if [ -z "${FIND}" ]; then LogText "Result: ${I}: suhosin.executor.func.blacklist not found" else LogText "Result: ${I}: found suhosin.executor.func.blacklist" FOUND=1 fi done if [ ${FOUND} -eq 0 ]; then LogText "Result: all PHP functions can be executed" Display --indent 4 --text "- Checking PHP disabled functions" --result "${STATUS_NONE}" --color YELLOW ReportSuggestion ${TEST_NO} "Harden PHP by disabling risky functions" LogText "Functions of interest to research/disable: chown, diskfreespace, disk_free_space, disk_total_space, dl, exec, escapeshellarg, escapeshellcmd, fileinode, highlight_file, max_execution_time, passthru, pclose, phpinfo, popen, proc_close, proc_open, proc_get_status, proc_nice, proc_open, proc_terminate, set_time_limit, shell_exec, show_source, system)" AddHP 0 1 else LogText "Result: one or more PHP functions are disabled/blacklisted" Display --indent 4 --text "- Checking PHP disabled functions" --result "${STATUS_FOUND}" --color GREEN AddHP 3 3 fi fi # ################################################################################# # # Test : PHP-2368 # Description : Check php register_globals option # Notes : Don't test for it if PHP version is 5.4.0 or later (it has been removed) if [ ! -z "${PHPINIFILE}" -a ! -z "${PHPVERSION}" -a ! -z "${EGREPBINARY}" ]; then if [ -f "${PHPINIFILE}" ]; then FIND=$(echo ${PHPVERSION} | ${EGREPBINARY} "^(4.|5.[0-3])") if [ -z "${FIND}" ]; then PREQS_MET="NO"; Debug "Found most likely PHP version 5.4.0 or higher (${PHPVERSION}) which does not use register_globals" else PREQS_MET="YES"; Debug "Found PHP version 4 or up to 5.3 (${FIND}) which we are going to scan" fi else Debug "File php.ini (${PHPINIFILE}) not found" fi else PREQS_MET="NO" Debug "Skipping test: php.ini not found, or PHP version empty" Debug "php.ini: ${PHPINIFILE}" Debug "version: ${PHPVERSION}" fi Register --test-no PHP-2368 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP register_globals option" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking PHP register_globals option" FIND=$(${EGREPBINARY} -i 'register_globals.*(on|yes|1)' ${PHPINIFILE} | ${GREPBINARY} -v '^;') if [ ! -z "${FIND}" ]; then Display --indent 4 --text "- Checking register_globals option" --result "${STATUS_WARNING}" --color RED ReportWarning ${TEST_NO} "PHP option register_globals option is turned on, which can be a risk for variable value overwriting" ReportSuggestion ${TEST_NO} "Change the register_globals line to: register_globals = Off" LogText "Result: register_globals option is turned on, which can be a risk for variable value overwriting." AddHP 1 2 else Display --indent 4 --text "- Checking register_globals option" --result "${STATUS_OK}" --color GREEN LogText "Result: No 'register_globals' found. Most likely it is in disabled state (0, no, or off), which is the default nowadays and considered the safe value." ReportManual ${TEST_NO}:01 AddHP 2 2 fi fi # ################################################################################# # # Test : PHP-2372 # Description : Check php expose_php option # Notes : Extend test to check all PHP files YYY if [ ! -z "${PHPINIFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no PHP-2372 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP expose_php option" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking expose_php option" FIND=$(${EGREPBINARY} -i 'expose_php.*(off|no|0)' ${PHPINIFILE} | ${GREPBINARY} -v '^;') if [ -z "${FIND}" ]; then Display --indent 4 --text "- Checking expose_php option" --result "${STATUS_ON}" --color RED ReportWarning ${TEST_NO} "PHP option expose_php is possibly turned on, which can reveal useful information for attackers." ReportSuggestion ${TEST_NO} "Change the expose_php line to: expose_php = Off" Report "Result: expose_php option is turned on, which can expose useful information for an attacker" AddHP 1 2 else Display --indent 4 --text "- Checking expose_php option" --result "${STATUS_OFF}" --color GREEN LogText "Result: Found 'expose_php' in disabled state (0, no, or off)" AddHP 2 2 fi # TODO Check through all files fi # ################################################################################# # # Test : PHP-2374 # Description : Check PHP enable_dl option # Notes : Extend test to check all PHP files if [ ! -z "${PHPINIFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no PHP-2374 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP enable_dl option" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking PHP enable_dl option" FIND=$(${EGREPBINARY} -i 'enable_dl.*(on|yes|1)' ${PHPINIFILE} | ${GREPBINARY} -v '^;') if [ ! -z "${FIND}" ]; then Display --indent 4 --text "- Checking enable_dl option" --result "${STATUS_ON}" --color YELLOW Report "Result: enable_dl option is turned on, which can be used to enable more modules dynamically and circumventing security controls" ReportSuggestion ${TEST_NO} "Change the enable_dl line to: enable_dl = Off, to disable dynamically loading new modules" AddHP 0 1 else Display --indent 4 --text "- Checking enable_dl option" --result "${STATUS_OFF}" --color GREEN LogText "Result: Found 'enable_dl' in disabled state (not present, 0, no, or off)" AddHP 2 2 fi fi # ################################################################################# # # Test : PHP-2376 # Description : Check PHP allow_url_fopen option # Notes : Extend test to check all PHP files YYY if [ ! -z "${PHPINIFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no PHP-2376 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP allow_url_fopen option" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking PHP allow_url_fopen option" FIND=$(${EGREPBINARY} -i 'allow_url_fopen.*(off|no|0)' ${PHPINIFILE} | ${GREPBINARY} -v '^;') if [ -z "${FIND}" ]; then Display --indent 4 --text "- Checking allow_url_fopen option" --result "${STATUS_ON}" --color YELLOW LogText "Result: allow_url_fopen option is turned on, which can be used for riskful downloads via PHP" ReportSuggestion ${TEST_NO} "Change the allow_url_fopen line to: allow_url_fopen = Off, to disable downloads via PHP" AddHP 0 1 else Display --indent 4 --text "- Checking allow_url_fopen option" --result "${STATUS_OFF}" --color GREEN LogText "Result: Found 'allow_url_fopen' in disabled state (0, no, or off)" AddHP 2 2 fi # TODO Check through all files fi # ################################################################################# # # Test : PHP-2378 # Description : Check PHP allow_url_include option # Notes : Extend test to check all PHP files YYY if [ ! -z "${PHPINIFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi Register --test-no PHP-2378 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP allow_url_include option" if [ ${SKIPTEST} -eq 0 ]; then LogText "Test: Checking PHP allow_url_include option" FIND=$(${EGREPBINARY} -i 'allow_url_include.*(off|no|0)' ${PHPINIFILE} | ${GREPBINARY} -v '^;') if [ -z "${FIND}" ]; then Display --indent 4 --text "- Checking allow_url_include option" --result "${STATUS_ON}" --color YELLOW Report "Result: allow_url_include option is turned on, which can be used for riskful downloads via PHP" ReportSuggestion ${TEST_NO} "Change the allow_url_include line to: allow_url_include = Off, to disable downloads via PHP" AddHP 0 1 else Display --indent 4 --text "- Checking allow_url_include option" --result "${STATUS_OFF}" --color GREEN LogText "Result: Found 'allow_url_include' in disabled state (0, no, or off)" AddHP 2 2 fi fi # ################################################################################# # # - test disabled for time being, as newer suhosin7 work is not stable enough - # Test : PHP-2379 # Description : Check PHP suhosin extension status #if [ ! -z "${PHPINI_ALLFILES}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi #Register --test-no PHP-2379 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check PHP suhosin extension status" #if [ ${SKIPTEST} -eq 0 ]; then # FOUND=0 # SIMULATION=0 # MAJOR_VERSION=$(echo ${PHPVERSION} | ${EGREPBINARY} "^7") # if [ "${OS}" = "OpenBSD" ]; then # FOUND=1 # On OpenBSD, Suhosin is hard linked into PHP # SIMULATION=off # else # for I in ${PHPINI_ALLFILES}; do # LogText "Test: Checking for PHP suhosin extension status in file ${I}" # FIND=$(${GREPBINARY} -oP '^extension=.*?suhosin7?.so.*$' ${I}) # if [ -z "${FIND}" ]; then # LogText "Result: ${I}: suhosin is not enabled" # else # LogText "Result: ${I}: suhosin is enabled" # FOUND=1 # fi # LogText "Test: Check Suhosin simulation mode status" # SIMULATION=$(${GREPBINARY} -oP '^suhosin.simulation.*$' ${I} | ${CUTBINARY} -d= -f2 | ${GREPBINARY} -io 'off' | ${TRBINARY} '[:upper:]' '[:lower:]') # if [ "${SIMULATION}" = "off" ]; then # LogText "Result: ${I}: suhosin simulation mode is not active" # else # LogText "Result: ${I}: suhosin simulation mode is active" # fi # done # fi # # Check Suhosin for PHP 7 # if [ ! -z "${MAJOR_VERSION}" -a ${FOUND} -eq 1 ]; then # LogText "Test: Check Suhosin for PHP 7 is not enabled" # LogText "Result: Suhosin for PHP 7 is in alpha stage and should not be used in production" # ReportSuggestion ${TEST_NO} "Disable Suhosin for PHP 7" # Display --indent 4 --text "- Checking PHP suhosin extension status" --result "${STATUS_WARNING}" --color RED # Display --indent 6 --text "- Suhosin is enabled for PHP 7" --result "${STATUS_WARNING}" --color RED # AddHP 0 1 # elif [ ! -z "${MAJOR_VERSION}" -a ${FOUND} -eq 0 ]; then # LogText "Test: Check Suhosin for PHP 7 is not enabled" # LogText "Result: Suhosin for PHP 7 is not enabled" # Display --indent 4 --text "- Checking PHP suhosin extension status" --result "${STATUS_OK}" --color GREEN # Display --indent 6 --text "- Suhosin is not enabled for PHP 7" --result "${STATUS_OK}" --color GREEN # AddHP 1 1 # else # if [ ${FOUND} -eq 0 ]; then # LogText "Result: Suhosin extension is not enabled" # Display --indent 4 --text "- Checking PHP suhosin extension status" --result "${STATUS_WARNING}" --color RED # ReportSuggestion ${TEST_NO} "Harden PHP by enabling suhosin extension" # LogText "suhosin extension is not enabled" # AddHP 0 1 # else # LogText "Result: Suhosin extension is enabled" # Display --indent 4 --text "- Checking PHP suhosin extension status" --result "${STATUS_OK}" --color GREEN # AddHP 2 2 # fi # if [ "${SIMULATION}" = "off" ]; then # LogText "Result: Suhosin simulation mode is not active" # Display --indent 6 --text "- Suhosin simulation mode status" --result "${STATUS_OK}" --color GREEN # AddHP 2 2 # else # LogText "Result: Suhosin simulation mode is active" # Display --indent 6 --text "- Suhosin simulation mode status" --result "${STATUS_WARNING}" --color RED # ReportSuggestion ${TEST_NO} "Harden PHP by deactivating suhosin simulation mode" # LogText "suhosin simulation mode is active" # AddHP 0 1 # fi # fi #fi # ################################################################################# # WaitForKeyPress # #================================================================================ # Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com