#!/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.
#
#################################################################################
#
# Software: PHP
#
#################################################################################
#
InsertSection "PHP"
# Possible locations of php.ini
PHPINILOCS="/etc/php.ini /etc/php.ini.default \
/etc/php/cgi-php5/php.ini /etc/php/cli-php5/php.ini /etc/php/apache2-php5/php.ini \
/etc/php/apache2-php5.4/php.ini /etc/php/apache2-php5.5/php.ini \
/etc/php5/cgi/php.ini \
/etc/php5/cli/php.ini \
/etc/php5/cli-php5.4/php.ini /etc/php5/cli-php5.5/php.ini /etc/php5/cli-php5.6/php.ini \
/etc/php5/apache2/php.ini \
/etc/php5/fpm/php.ini \
/private/etc/php.ini \
/var/www/conf/php.ini \
/usr/local/etc/php.ini /usr/local/lib/php.ini \
/usr/pkg/etc/php.ini"
PHPINIDIRS="/etc/php5/conf.d \
/etc/php.d"
#
#################################################################################
#
# 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 [ ! "${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=`grep "^disable_functions.*=" ${I}`
if [ "${FIND}" = "" ]; then
LogText "Result: ${I}: disabled_functions not found"
else
LogText "Result: ${I}: found disabled_functions"
FOUND=1
fi
FIND=`grep "^suhosin.executor.func.blacklist=" ${I}`
if [ "${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 [ ! "${PHPINIFILE}" = "" -a ! "${PHPVERSION}" = "" -a ! "${EGREPBINARY}" = "" ]; then
if [ -f "${PHPINIFILE}" ]; then
FIND=`echo ${PHPVERSION} | ${EGREPBINARY} "^(4.|5.[0-3])"`
if [ "${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=`egrep -i 'register_globals.*(on|yes|1)' ${PHPINIFILE} | grep -v '^;'`
if [ ! "${FIND}" = "" ]; then
Display --indent 4 --text "- Checking register_globals option" --result "${STATUS_WARNING}" --color RED
ReportWarning ${TEST_NO} "M" "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 ${TEST_NO}:01
AddHP 2 2
fi
fi
#
#################################################################################
#
# Test : PHP-2372
# Description : Check php expose_php option
# Notes : Extend test to check all PHP files YYY
if [ ! "${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=`egrep -i 'expose_php.*(off|no|0)' ${PHPINIFILE} | grep -v '^;'`
if [ "${FIND}" = "" ]; then
Display --indent 4 --text "- Checking expose_php option" --result "${STATUS_ON}" --color RED
ReportWarning ${TEST_NO} "M" "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
#YYY Check through all files
fi
#
#################################################################################
#
# Test : PHP-2374
# Description : Check PHP enable_dl option
# Notes : Extend test to check all PHP files
if [ ! "${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 [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Checking PHP enable_dl option"
FIND=$(egrep -i 'enable_dl.*(on|yes|1)' ${PHPINIFILE} | grep -v '^;')
if [ ! -z "${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 [ ! "${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=`egrep -i 'allow_url_fopen.*(off|no|0)' ${PHPINIFILE} | grep -v '^;'`
if [ "${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
#YYY 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 [ ! "${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=`egrep -i 'allow_url_include.*(off|no|0)' ${PHPINIFILE} | grep -v '^;'`
if [ "${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
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com