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lynis
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lynis
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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# 2013-now, CISOfy
#
# Web site: https://cisofy.com
#
# 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.
#
# Lynis is licensed under GPLv3, Plugins are licensed differently (see plugins)
#
#################################################################################
#
# Lynis is an automated auditing tool for Unix based operating systems.
#
#################################################################################
#
# In Solaris /bin/sh is not POSIX, but /usr/xpg4/bin/sh is.
# Switch to /usr/xpg4/bin/sh if it exists and we are not already running it.
if [ "$(uname)" = "SunOS" ]; then
test "$_" != "/usr/xpg4/bin/sh" && test -f /usr/xpg4/bin/sh && exec /usr/xpg4/bin/sh "$0" "$@"
fi
#
#################################################################################
#
# Code quality: don't allow using undefined variables
# Notes: $_ may be empty on FreeBSD
set -o nounset
#
#################################################################################
#
# Program information
PROGRAM_NAME="Lynis"
PROGRAM_AUTHOR="CISOfy"
PROGRAM_AUTHOR_CONTACT="lynis-dev@cisofy.com"
PROGRAM_WEBSITE="https://cisofy.com/lynis/"
# Version details
PROGRAM_RELEASE_DATE="2019-11-18"
PROGRAM_RELEASE_TIMESTAMP=1574071362
PROGRAM_RELEASE_TYPE="pre-release" # pre-release or release
PROGRAM_VERSION="3.0.0"
# Source, documentation and license
PROGRAM_SOURCE="https://github.com/CISOfy/lynis"
PROGRAM_PACKAGE="https://packages.cisofy.com/"
PROGRAM_DOCUMENTATION="https://cisofy.com/docs/"
PROGRAM_COPYRIGHT="2007-2019, ${PROGRAM_AUTHOR} - ${PROGRAM_WEBSITE}"
PROGRAM_LICENSE="${PROGRAM_NAME} 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 the LICENSE file for details about using this software."
PROGRAM_EXTRAINFO="Enterprise support available (compliance, plugins, interface and tools)"
# Version number of report files (when format changes in future)
REPORT_version_major="1"; REPORT_version_minor="0"
REPORT_version="${REPORT_version_major}.${REPORT_version_minor}"
#
#################################################################################
#
# Configure Include path and files
#
#################################################################################
#
# Check setuid bit
if [ -u "$0" ]; then echo "The called binary has the set-user-id bit - As this is unusual, execution will be stopped."; exit 1; fi
# Work directory
WORKDIR=$(pwd)
# Test from which directories we can use all functions and tests
USE_CWD=0
if case "$@" in *--usecwd*) true;; *) false;; esac; then
USE_CWD=1
INCLUDEDIR="./include"
else
INCLUDEDIR=""
tINCLUDE_TARGETS="/usr/local/include/lynis /usr/local/lynis/include /usr/share/lynis/include ./include" # Default paths to check (CWD as last option, in case we run from standalone)
for I in ${tINCLUDE_TARGETS}; do
if [ "${I}" = "./include" ]; then
if [ -d "${WORKDIR}/include" ]; then INCLUDEDIR="${WORKDIR}/include"; fi
elif [ -d ${I} -a -z "${INCLUDEDIR}" ]; then
INCLUDEDIR=${I}
fi
done
fi
# Drop out if our include directory can't be found
if [ -z "${INCLUDEDIR}" ]; then
printf "%s" "\nFatal error: can't find include directory\nMake sure to execute ${PROGRAM_NAME} from untarred directory or check your installation."
exit 1
fi
# Test for database directory
if [ ${USE_CWD} -eq 1 ]; then
DBDIR="./db"
else
DBDIR=""; tDB_TARGETS="/usr/local/share/lynis/db /usr/local/lynis/db /usr/share/lynis/db ./db"
for I in ${tDB_TARGETS}; do
if [ "${I}" = "./db" ]; then
if [ -d "${WORKDIR}/db" ]; then DBDIR="${WORKDIR}/db"; fi
elif [ -d ${I} -a -z "${DBDIR}" ]; then
DBDIR="${I}"
fi
done
fi
#
#################################################################################
#
MYID=""
# Check user to determine file permissions later on. If we encounter Solaris, use related id binary instead
if [ -x /usr/xpg4/bin/id ]; then
MYID=$(/usr/xpg4/bin/id -u 2> /dev/null)
elif [ "$(uname)" = "SunOS" ]; then
MYID=$(id | tr '=' ' ' | tr '(' ' ' | awk '{ print $2 }' 2> /dev/null)
else
MYID=$(id -u 2> /dev/null)
fi
if [ -z "${MYID}" ]; then Display "Could not find user ID with id command. Want to help improve Lynis? Raise a ticket at ${PROGRAM_SOURCE}"; ExitFatal; fi
#
#################################################################################
#
# Set basic values and test permissions of the files to include, such as:
# - consts: bin paths, text strings, colors
# - functions: function library
#
#################################################################################
#
# Determine if we are root (UID = 0)
if [ ${MYID} -eq 0 ]; then
PRIVILEGED=1
PENTESTINGMODE=0
else
PRIVILEGED=0
# Set to pentesting mode if scan is without root privileges
PENTESTINGMODE=1
fi
# Perform a basic check for permissions. After including functions, using SafePerms()
IGNORE_FILE_PERMISSION_ISSUES=0
FILES_TO_CHECK="consts functions"
ISSUE=0
ISSUE_TYPE=""
SHOWPERMERROR=0
for FILE in ${FILES_TO_CHECK}; do
PERMS=$(ls -l ${INCLUDEDIR}/${FILE} | cut -c 2-10)
GROUPPERMS=$(ls -l ${INCLUDEDIR}/${FILE} | cut -c 5-7)
GROUPOWNERID=$(ls -n ${INCLUDEDIR}/${FILE} | awk '{ print $4 }')
OWNER=$(ls -l ${INCLUDEDIR}/${FILE} | awk -F" " '{ print $3 }')
OWNERID=$(ls -n ${INCLUDEDIR}/${FILE} | awk -F" " '{ print $3 }')
# Check permissions of include/X file (400, 600, 640, 644)
if [ "${PERMS}" = "rwxrwxrwx" ]; then
ISSUE=1; ISSUE_TYPE="perms"; echo "[!] Change file permissions of ${INCLUDEDIR}/${FILE} to 640."; echo " Command: chmod 640 ${INCLUDEDIR}/${FILE}"
elif [ ! "${PERMS}" = "r--------" -a ! "${PERMS}" = "rw-------" -a ! "${PERMS}" = "rw-r-----" -a ! "${PERMS}" = "rw-r--r--" ]; then
# If group ID equals user ID, we consider permissions to be fine (probably default umask)
if [ ! "${GROUPOWNERID}" = "${OWNERID}" ]; then
ISSUE=1; ISSUE_TYPE="perms"; echo "[!] Change file permissions of ${INCLUDEDIR}/${FILE} to 640."; echo " Command: chmod 640 ${INCLUDEDIR}/${FILE}"
fi
fi
# Check if owner of both files is root user, or the same user which is running Lynis (for pentester mode)
if [ ! "${OWNER}" = "root" -a ! "${OWNERID}" = "0" ]; then
if [ ! "${MYID}" = "${OWNERID}" ]; then
ISSUE=1; ISSUE_TYPE="owner"; SHOWPERMERROR=1; ISSUE_FILE="${FILE}"; ISSUE_OWNER="${OWNER}"; ISSUE_OWNERID="${OWNERID}"
fi
fi
done
if [ ${SHOWPERMERROR} -eq 1 ]; then
printf "%s" "
[!] Change ownership of ${INCLUDEDIR}/${ISSUE_FILE} to 'root' or similar (found: ${ISSUE_OWNER} with UID ${ISSUE_OWNERID}).
Command:
# chown 0:0 ${INCLUDEDIR}/${ISSUE_FILE}
"
fi
# Now if there is an issue with permissions, show it to the user and let them decide how to continue.
if [ ${ISSUE} -eq 1 ]; then
printf "\n[X] Security check failed\n\n Why do I see this error?\n -------------------------------\n This is a protection mechanism to prevent the root user from executing user created files. The files may be altered, or including malicious pieces of script.\n\n What can I do?\n ---------------------\n Option 1) Check if a trusted user created the files (e.g. due to using Git, Homebrew or similar).\n If you trust these files, you can decide to continue this run by pressing ENTER.\n"
if [ "${ISSUE_TYPE}" = "perms" ]; then
printf "\n Option 2) Change permissions of the related files.\n\n Commands (full directory):\n # chmod 640 include/*\n # ./lynis audit system"
elif [ "${ISSUE_TYPE}" = "owner" ]; then
printf "\n Option 2) Change ownership of the related files (or full directory).\n\n Commands (full directory):\n # cd ..\n # chown -R 0:0 lynis\n # cd lynis\n # ./lynis audit system"
fi
printf "\n\n[ Press ENTER to continue, or CTRL+C to cancel ]"
IGNORE_FILE_PERMISSION_ISSUES=1
read -r void
fi
# Now include files if permissions are correct, or user decided to continue
. ${INCLUDEDIR}/consts
. ${INCLUDEDIR}/functions
#
#################################################################################
#
# Language settings
#
#################################################################################
#
# Auto detection of language based on shell LANG variable. This is required by the Display() function to deal with multi-bytes characters.
DISPLAY_LANG="${LANG:-}"
# Extract the short notation of the language (first two characters).
if [ -x "$(command -v locale 2> /dev/null)" ]; then
LANGUAGE=$(locale | egrep "^LANG=" | cut -d= -f2 | cut -d_ -f1 | egrep "^[a-z]{2}$")
# Try locale command if shell variable had no value
if [ -z "${DISPLAY_LANG}" ]; then
DISPLAY_LANG=$(locale | egrep "^LANG=" | cut -d= -f2)
fi
else
LANGUAGE="en"
fi
# Set default language: 'en' (English) if no value is set
if [ -z "${LANGUAGE}" ]; then
LANGUAGE="en"
fi
# Import translations. First import English to prefill all texts
if [ -f ${DBDIR}/languages/en ]; then
if SafeFile "${DBDIR}/languages/en"; then
. ${DBDIR}/languages/en
else
ExitFatal "Incorrect ownership or permissions of language file (${DBDIR}/languages/en)"
fi
else
echo "Could not find languages directory (file: ${DBDIR}/languages/en)"
exit 1
fi
#
#################################################################################
#
# Traps
#
#################################################################################
#
trap CleanUp INT TERM
trap Status USR1
# Use safe umask for the files we create
umask 027
#
#################################################################################
#
# Parameter checks
#
#################################################################################
#
SafePerms ${INCLUDEDIR}/parameters
. ${INCLUDEDIR}/parameters
# Disable logging if no alternative was provided
if [ ${PRIVILEGED} -eq 0 ]; then
if [ -z "${LOGFILE}" ]; then
# Try creating a log file in temporary directory
if [ ! -f /tmp/lynis.log ]; then
if [ -L /tmp/lynis.log ]; then echo "Log file is symlinked, which can introduce the risk of a symlink attack."; exit 1; fi
touch /tmp/lynis.log
if [ $? -eq 0 ]; then LOGFILE="/tmp/lynis.log"; else LOGFILE="/dev/null"; fi
else
LOGFILE="/tmp/lynis.log"
fi
else
if [ -L "${LOGFILE}" ]; then echo "Log file is symlinked, which can introduce the risk of a symlink attack."; exit 1; fi
fi
if [ -z "${REPORTFILE}" ]; then
touch /tmp/lynis-report.dat
if [ -L /tmp/lynis-report.dat ]; then echo "Report file is symlinked, which can introduce the risk of a symlink attack."; exit 1; fi
if [ $? -eq 0 ]; then REPORTFILE="/tmp/lynis-report.dat"; else REPORTFILE="/dev/null"; fi
else
if [ -L "${REPORTFILE}" ]; then echo "Report file is symlinked, which can introduce the risk of a symlink attack."; exit 1; fi
fi
fi
#
#################################################################################
#
# Program information
#
#################################################################################
#
# CV - Current Version
PROGRAM_AC=$(echo ${PROGRAM_VERSION} | awk '{ print $1 }' | sed 's/[.]//g')
PROGRAM_LV=0
#
#################################################################################
#
# Initialize and default settings
#
#################################################################################
#
if [ ${QUIET} -eq 0 ]; then
printf "\n${WHITE}[ ${PROGRAM_NAME} ${PROGRAM_VERSION} ]${NORMAL}\n\n################################################################################\n ${PROGRAM_LICENSE}\n\n ${PROGRAM_COPYRIGHT}\n ${PROGRAM_EXTRAINFO}\n################################################################################\n\n"
fi
if [ "${PROGRAM_RELEASE_TYPE}" = "beta" ]; then
printf "%s" "
${WHITE}
#########################################################
# ${YELLOW}BETA VERSION${WHITE} #
#########################################################
Thank you for testing a beta release. Make sure to read
all available documentation before proceeding and/or
requesting support. Due the nature of beta releases, it
is possible new features give unexpected warnings.
#########################################################
${NORMAL}
"
fi
#
#################################################################################
#
InsertSection "${GEN_INITIALIZE_PROGRAM}"
# Discover any profiles
DiscoverProfiles
# Initialize and check profile file, auditor name, log file and report file
if [ -z "${LOGDIR}" ]; then LOGDIR="/var/log"; fi
if [ -z "${AUDITORNAME}" ]; then AUDITORNAME="[Not Specified]"; fi
if [ -z "${LOGFILE}" ]; then LOGFILE="${LOGDIR}/lynis.log"; fi
if [ -z "${REPORTFILE}" ]; then REPORTFILE="${LOGDIR}/lynis-report.dat"; fi
#
#################################################################################
#
# PID :: Check PID file, to avoid multiple instances running at the same time.
#
#################################################################################
#
# Decide where to write our PID file. For unprivileged users this will be in their home directory, or /tmp if their
# home directory isn't set. For root it will be /var/run, or the current working directory if /var/run doesn't exist.
MYHOMEDIR=$(echo ~ 2> /dev/null)
if [ -z "${MYHOMEDIR}" ]; then MYHOMEDIR="/tmp"; fi
if [ ${PRIVILEGED} -eq 0 ]; then
PIDFILE="${MYHOMEDIR}/lynis.pid"
elif [ -d /var/run ]; then
PIDFILE="/var/run/lynis.pid"
else
PIDFILE="./lynis.pid"
fi
# Check if there is already a PID file in any of the locations (incorrect termination of previous instance)
if [ -f "${MYHOMEDIR}/lynis.pid" -o -f "./lynis.pid" -o -f "/var/run/lynis.pid" ]; then
printf "%s" "
${WARNING}Warning${NORMAL}: ${WHITE}PID file exists, probably another Lynis process is running.${NORMAL}
------------------------------------------------------------------------------
If you are unsure if another Lynis process is running currently, you are advised
to stop the current process and check the process list first. If you cancelled
a previous instance (by using CTRL+C), you can ignore this message.
You are advised to check for temporary files after program completion.
------------------------------------------------------------------------------
${YELLOW}Note: ${WHITE}Cancelling the program can leave temporary files behind${NORMAL}
"
# Quit directly for cron jobs.
if [ ${CRONJOB} -eq 1 ]; then
echo "Quitting, to prevent multiple cron jobs running at the same time"
exit 1 # Manually exit, no cleanups to prevent deleting an active PID file
else
WaitForKeyPress
fi
# Deleting any stale PID files that might exist. Note: Display function does not work yet at this point
if [ -f "${MYHOMEDIR}/lynis.pid" ]; then rm -f "${MYHOMEDIR}/lynis.pid"; fi
if [ -f "./lynis.pid" ]; then rm -f "./lynis.pid"; fi
if [ -f "/var/run/lynis.pid" ]; then rm -f "/var/run/lynis.pid"; fi
fi
# Ensure symlink attack is not possible, by confirming there is no symlink of the file already
OURPID=$(echo $$)
if [ -L ${PIDFILE} ]; then
echo "Found symlinked PID file (${PIDFILE}), quitting"
ExitFatal
else
# Create new PID file writable only by owner
echo "${OURPID}" > ${PIDFILE}
chmod 600 ${PIDFILE}
fi
#
#################################################################################
#
# Check program parameters
#
#################################################################################
#
# Bail out if we didn't get any parameter, or incorrect ones
if [ ${PARAMCOUNT} -eq 0 -o ${WRONGOPTION} -eq 1 -o ${VIEWHELP} -eq 1 ]; then
printf "%s" "
${GREEN}Usage:${NORMAL} lynis ${CYAN}command ${GRAY}[options]${NORMAL}
${WHITE}Command:${NORMAL}
${CYAN}audit${NORMAL}
audit system : Perform local security scan
audit system remote <host> : Remote security scan
audit dockerfile <file> : Analyze Dockerfile
${CYAN}show${NORMAL}
show : Show all commands
show version : Show ${PROGRAM_NAME} version
show help : Show help
${CYAN}update${NORMAL}
update info : Show update details
${WHITE}Options:${NORMAL}
${WHITE}Alternative system audit modes${NORMAL}
${GRAY}--forensics${NORMAL} : Perform forensics on a running or mounted system
${GRAY}--pentest${NORMAL} : Non-privileged, show points of interest for pentesting
${WHITE}Layout options${NORMAL}
${GRAY}--no-colors${NORMAL} : Don't use colors in output
${GRAY}--quiet (-q)${NORMAL} : No output
${GRAY}--reverse-colors${NORMAL} : Optimize color display for light backgrounds
${WHITE}Misc options${NORMAL}
${GRAY}--debug${NORMAL} : Debug logging to screen
${GRAY}--no-log${NORMAL} : Don't create a log file
${GRAY}--profile ${BROWN}<profile>${NORMAL} : Scan the system with the given profile file
${GRAY}--view-manpage (--man)${NORMAL} : View man page
${GRAY}--verbose${NORMAL} : Show more details on screen
${GRAY}--version (-V)${NORMAL} : Display version number and quit
${GRAY}--wait${NORMAL} : Wait between a set of tests
${WHITE}Enterprise options${NORMAL}
${GRAY}--plugindir ${BROWN}<path>${NORMAL} : Define path of available plugins
${GRAY}--upload${NORMAL} : Upload data to central node
More options available. Run '$0 show options', or use the man page.
"
if [ ${WRONGOPTION} -eq 1 ]; then
echo " ${RED}Error${NORMAL}: ${WHITE}Invalid option '${WRONGOPTION_value}'${NORMAL}"
else
if [ ${VIEWHELP} -eq 0 ]; then
echo " ${RED}No command provided.${WHITE} Exiting..${NORMAL}"
echo ""
fi
fi
echo ""
# Cleanup PID file if we drop out earlier
RemovePIDFile
# Exit with exit code 1
exit 64
fi
#
#################################################################################
#
if [ ${PRIVILEGED} -eq 0 -a ${CHECK} -eq 1 -a ${QUIET} -eq 0 ]; then
printf "%s" "${WHITE}
###################################################################
# #
# ${PURPLE}NON-PRIVILEGED SCAN MODE${WHITE} #
# #
###################################################################
${NORMAL}
${YELLOW}NOTES:${NORMAL}
--------------
${WHITE}*${NORMAL} Some tests will be skipped (as they require root permissions)
${WHITE}*${NORMAL} Some tests might fail silently or give different results
"
sleep 3
if [ -z "${LOGFILE}" -o "${LOGFILE}" = "/dev/null" ]; then
printf "%s" "
${RED}WARNING:${NORMAL}
${WHITE}*${NORMAL} No suggestions or warnings will be displayed in report (due to missing log file)"
fi
fi
#
#################################################################################
#
# OS Detection
#
#################################################################################
#
SafePerms ${INCLUDEDIR}/osdetection
. ${INCLUDEDIR}/osdetection
Display --indent 2 --text "- Detecting OS... " --result DONE --color GREEN
# Check hostname
case ${OS} in
HP-UX)
HOSTNAME=$(hostname) ;;
Solaris)
HOSTNAME=$(uname -n) ;;
*)
HOSTNAME=$(hostname -s 2> /dev/null) ;;
esac
if [ -z "${HOSTNAME}" ]; then
HOSTNAME=$(hostname 2> /dev/null)
if [ -z "${HOSTNAME}" ]; then HOSTNAME="no-hostname"; fi
fi
FQDN=$(hostname 2> /dev/null)
if [ "${OS}" = "Linux" -a "${HOSTNAME}" = "${FQDN}" ]; then
FQDN=$(hostname -f 2> /dev/null)
fi
#
#################################################################################
#
# Clear log and report files
#
#################################################################################
#
# Clear log file and test if it's writable
CDATE=$(date "+%Y-%m-%d %H:%M:%S")
if [ ${LOGTEXT} -eq 1 ]; then echo "${CDATE} Starting ${PROGRAM_NAME} ${PROGRAM_VERSION} with PID ${OURPID}, build date ${PROGRAM_RELEASE_DATE}" > ${LOGFILE}; fi
if [ $? -gt 0 ]; then
Display --indent 2 --text "- Clearing log file (${LOGFILE})... " --result WARNING --color RED
echo "${WARNING}Fatal error${NORMAL}: problem while writing to log file. Check location and permissions."
RemovePIDFile
exit 1
fi
LogTextBreak
LogText "### ${PROGRAM_COPYRIGHT} ###"
# Clear report file (to avoid appending to an existing file)
if [ ${CREATE_REPORT_FILE} -eq 1 ]; then echo "# ${PROGRAM_NAME} Report" > ${REPORTFILE}; fi
Report "report_version_major=${REPORT_version_major}"
Report "report_version_minor=${REPORT_version_minor}"
CDATE=$(date "+%F %H:%M:%S")
Report "report_datetime_start=${CDATE}"
Report "auditor=${AUDITORNAME}"
Report "lynis_version=${PROGRAM_VERSION}"
Report "os=${OS}"
Report "os_name=${OS_NAME}"
Report "os_fullname=${OS_FULLNAME}"
Report "os_version=${OS_VERSION}"
if [ "${OS}" = "Linux" ]; then Report "linux_version=${LINUX_VERSION}"; fi
if [ -n "${OS_KERNELVERSION}" ]; then Report "os_kernel_version=${OS_KERNELVERSION}"; fi
if [ -n "${OS_KERNELVERSION_FULL}" ]; then Report "os_kernel_version_full=${OS_KERNELVERSION_FULL}"; fi
Report "hostname=${HOSTNAME}"
if [ -z "${HOSTNAME}" ]; then
HOSTNAME="no-hostname"
LogText "Info: could not find a hostname, using 'no-hostname' instead"
ReportSuggestion "LYNIS" "Check your hostname configuration" "hostname -s"
fi
Report "test_category=${TEST_CATEGORY_TO_CHECK}"
Report "test_group=${TEST_GROUP_TO_CHECK}"
#
#################################################################################
#
# Read profile, set code checks, define language
#
#################################################################################
#
ParseProfiles
# Define if we keep working in strict mode (development)
if [ ${SET_STRICT} -eq 0 ]; then
set +u # Allow uninitialized variables
else
set -u # Do not allow unitialized variables
fi
# Import a different language when configured
if [ ! "${LANGUAGE}" = "en" ]; then
LogText "Language is set to ${LANGUAGE}"
Display --indent 2 --text "- Detecting language and localization" --result "${LANGUAGE}" --color WHITE
if [ ! -f ${DBDIR}/languages/${LANGUAGE} ]; then
Display --indent 4 --text "${YELLOW}Notice:${NORMAL} no language file found for '${LANGUAGE}' (tried: ${DBDIR}/languages/${LANGUAGE})"
if IsDeveloperVersion; then Display --indent 4 --text "See https://github.com/CISOfy/lynis-sdk/documentation/10-translations.md for more details to help translate Lynis"; fi
sleep 5
else
LogText "Importing language file (${DBDIR}/languages/${LANGUAGE})"
. ${DBDIR}/languages/${LANGUAGE}
fi
fi
LogTextBreak
# Pre-execution tests
if [ ${UPLOAD_DATA} -eq 1 -a -z "${LICENSE_KEY}" ]; then DisplayError "${ERROR_NO_LICENSE}" 64; fi
if [ ${UPLOAD_DATA} -eq 1 -a -z "${UPLOAD_SERVER}" ]; then DisplayError "${ERROR_NO_UPLOAD_SERVER}" 64; fi
#
#################################################################################
#
# Plugins
#
#################################################################################
#
# Plugin directory test
if [ -z "${PLUGINDIR}" ]; then
#LogText "Result: Searching for plugindir"
tPLUGIN_TARGETS="/usr/local/lynis/plugins /usr/local/share/lynis/plugins /usr/share/lynis/plugins /etc/lynis/plugins ./plugins"
for DIR in ${tPLUGIN_TARGETS}; do
if [ -d ${DIR} -a -z "${PLUGINDIR}" ]; then
PLUGINDIR=${DIR}
Debug "Result: found plugindir ${PLUGINDIR}"
fi
done
else
Debug "Plugin was already set before to ${PLUGINDIR} (most likely via program argument or profile)"
fi
# Drop out if our plugin directory can't be found
if [ -z "${PLUGINDIR}" -o ! -d ${PLUGINDIR} ]; then
echo "Fatal error: can't find plugin directory ${PLUGINDIR}"
echo "Make sure to execute ${PROGRAM_NAME} from untarred directory or check your installation."
exit 1
fi
#
#################################################################################
#
# Show program information to display
#
#################################################################################
#
if [ ${QUIET} -eq 0 -a ${SHOW_PROGRAM_DETAILS} -eq 1 ]; then
echo ""
echo " ---------------------------------------------------"
echo " Program version: ${PROGRAM_VERSION}"
echo " Operating system: ${OS}"
echo " Operating system name: ${OS_NAME}"
echo " Operating system version: ${OS_VERSION}"
LogText "EOL check: ${EOL}"
if [ ${EOL} -eq 1 ]; then
echo " End-of-life: ${WARNING}YES${NORMAL}"
ReportWarning "GEN-0010" "This version ${OS_VERSION} is marked end-of-life as of ${EOL_DATE}"
elif [ ${EOL} -eq 255 ]; then
# TODO - mark as item where community can provide help
LogText "Note: the end-of-life of '${OS_FULLNAME}' could not be checked. Entry missing in software-eol.db?"
fi
if [ -n "${OS_MODE}" ]; then echo " Operating system mode: ${OS_MODE}"; fi
echo " Kernel version: ${OS_KERNELVERSION}"
echo " Hardware platform: ${HARDWARE}"
echo " Hostname: ${HOSTNAME}"
echo " ---------------------------------------------------"
echo " Profiles: ${PROFILES}"
echo " Log file: ${LOGFILE}"
echo " Report file: ${REPORTFILE}"
echo " Report version: ${REPORT_version}"
echo " Plugin directory: ${PLUGINDIR}"
echo " ---------------------------------------------------"
echo " Auditor: ${AUDITORNAME}"
echo " Language: ${LANGUAGE}"
echo " Test category: ${TEST_CATEGORY_TO_CHECK}"
echo " Test group: ${TEST_GROUP_TO_CHECK}"
if [ ! "${ROOTDIR}" = "/" ]; then echo " Root directory (custom): ${ROOTDIR}"; fi
echo " ---------------------------------------------------"
fi
LogText "Program version: ${PROGRAM_VERSION}"
LogText "Operating system: ${OS}"
LogText "Operating system name: ${OS_NAME}"
LogText "Operating system version: ${OS_VERSION}"
if [ -n "${OS_MODE}" ]; then LogText "Operating system mode: ${OS_MODE}"; fi
LogText "Kernel version: ${OS_KERNELVERSION}"
if [ -n "${OS_KERNELVERSION_FULL}" ]; then
LogText "Kernel version (full): ${OS_KERNELVERSION_FULL}"
fi
LogText "Hardware platform: ${HARDWARE}"
LogText "-----------------------------------------------------"
LogText "Hostname: ${HOSTNAME}"
LogText "Auditor: ${AUDITORNAME}"
LogText "Profiles: ${PROFILES}"
LogText "Work directory: ${WORKDIR}"
LogText "Include directory: ${INCLUDEDIR}"
LogText "Plugin directory: ${PLUGINDIR}"
LogText "-----------------------------------------------------"
LogText "Log file: ${LOGFILE}"
LogText "Report file: ${REPORTFILE}"
LogText "Report version: ${REPORT_version}"
LogText "-----------------------------------------------------"
LogText "Test category: ${TEST_CATEGORY_TO_CHECK}"
LogText "Test group: ${TEST_GROUP_TO_CHECK}"
LogText "BusyBox used: ${SHELL_IS_BUSYBOX}"
Report "plugin_directory=${PLUGINDIR}"
LogTextBreak
#
#################################################################################
#
# Check for program update (and friendly force people to upgrade)
#
#################################################################################
#
LogText "Test: Checking for program update..."
UPDATE_AVAILABLE=0
if [ ${SKIP_UPGRADE_TEST} -eq 1 ]; then
LogText "Upgrade test skipped due profile option set (skip_upgrade_test)"
PROGRAM_LV="${PROGRAM_AC}"
else
CheckUpdates
fi
if [ -z "${PROGRAM_AC}" -o -z "${PROGRAM_LV}" ]; then
Display --indent 2 --text "- Program update status... " --result UNKNOWN --color YELLOW
LogText "Result: Update check failed. No network connection?"
LogText "Info: to perform an automatic update check, outbound DNS connections should be allowed (TXT record)."
# Set both to safe values
PROGRAM_AC=0; PROGRAM_LV=0
else
LogText "Current installed version : ${PROGRAM_AC}"
LogText "Latest stable version : ${PROGRAM_LV}"
if [ ${PROGRAM_LV} -gt ${PROGRAM_AC} ]; then
# Check if current version is REALLY outdated (10 versions ago)
PROGRAM_MINVERSION=$((PROGRAM_LV - 10))
LogText "Minimum required version : ${PROGRAM_MINVERSION}"
if [ ${PROGRAM_MINVERSION} -gt ${PROGRAM_AC} ]; then
Display --indent 2 --text "- Program update status... " --result "WARNING" --color RED
LogText "Result: This version is VERY outdated. Newer ${PROGRAM_NAME} release available!"
ReportWarning "LYNIS" "Version of Lynis is very old and should be updated"
Report "lynis_update_available=1"
UPDATE_AVAILABLE=1
else
Display --indent 2 --text "- Program update status... " --result "UPDATE AVAILABLE" --color YELLOW
LogText "Result: newer ${PROGRAM_NAME} release available!"
ReportSuggestion "LYNIS" "Version of Lynis outdated, consider upgrading to the latest version"
Report "lynis_update_available=1"
UPDATE_AVAILABLE=1
fi
else
if [ ${UPDATE_CHECK_SKIPPED} -eq 0 ]; then
Display --indent 2 --text "- Program update status... " --result "NO UPDATE" --color GREEN
LogText "No ${PROGRAM_NAME} update available."
Report "lynis_update_available=0"
else
Display --indent 2 --text "- Program update status... " --result "SKIPPED" --color YELLOW
LogText "Update check skipped due to constraints (e.g. missing dig binary)"
Report "lynis_update_available=-1"
fi
fi
fi
# Test for older releases, without testing via update mechanism
if [ "${OS}" = "Solaris" ]; then
NOW=$(nawk 'BEGIN{print srand()}')
else
NOW=$(date "+%s")
fi
OLD_RELEASE=0
TIME_DIFFERENCE_CHECK=10368000 # 4 months
RELEASE_PLUS_TIMEDIFF=$((PROGRAM_RELEASE_TIMESTAMP + TIME_DIFFERENCE_CHECK))
if [ ${NOW} -gt ${RELEASE_PLUS_TIMEDIFF} ]; then
# Show if release is old, only if we didn't show it with normal update check
if [ ${UPDATE_AVAILABLE} -eq 0 ]; then
ReportSuggestion "LYNIS" "This release is more than 4 months old. Consider upgrading"
fi
OLD_RELEASE=1
fi
# Show on screen message if release is very outdated (unless --quiet/--silent is used)
if [ ${UPDATE_AVAILABLE} -eq 1 -a ${QUIET} -eq 0 ]; then
echo ""
echo " ==============================================================================="
echo " ${CYAN}${PROGRAM_NAME} ${TEXT_UPDATE_AVAILABLE}${NORMAL}"
echo " ==============================================================================="
echo ""
if [ ${OLD_RELEASE} -eq 1 ]; then
echo " ${YELLOW}Current version is more than 4 months old${NORMAL}"
echo ""
fi
if [ ${PROGRAM_LV} -gt 0 ]; then
echo " Current version : ${YELLOW}${PROGRAM_AC}${NORMAL} Latest version : ${GREEN}${PROGRAM_LV}${NORMAL}"
echo ""
fi
echo " ${WHITE}Please update to the latest version.${NORMAL}"
echo " New releases include additional features, bug fixes, tests, and baselines.${NORMAL}"
echo ""
echo " Download the latest version:"
echo ""
echo " Packages (DEB/RPM) - https://packages.cisofy.com"
echo " Website (TAR) - https://cisofy.com/downloads/"
echo " GitHub (source) - https://github.com/CISOfy/lynis"
echo ""
echo " ==============================================================================="
echo ""
sleep 5
fi
LogTextBreak
#
#################################################################################
#
# Check which binaries are available to the scanning process
if [ -f ${INCLUDEDIR}/binaries ]; then
SafePerms ${INCLUDEDIR}/binaries
. ${INCLUDEDIR}/binaries
fi
LogTextBreak
#
#################################################################################
#
# Use hardware detection capabilities
IsVirtualMachine
if IsContainer; then
LogText "Result: ${PROGRAM_NAME} is running in container (${CONTAINER_TYPE})"
Report "container=1"
Report "container_type=${CONTAINER_TYPE}"
else
LogText "Result: ${PROGRAM_NAME} is not running in container"
Report "container=0"
fi
IsNotebook
#
#################################################################################
#
# Check for systemd active
if [ -d /run/systemd/system ]; then
LogText "Result: system is using systemd"
HAS_SYSTEMD=1
Report "systemd=1"
else
LogText "Result: systemd not found"
HAS_SYSTEMD=0
Report "systemd=0"
fi
#
#################################################################################
#
if IsVerbose; then
InsertSection "Program Details"
Display --indent 2 --text "- ${GEN_VERBOSE_MODE}" --result "YES" --color GREEN
if IsDebug; then
Display --indent 2 --text "- ${GEN_DEBUG_MODE}" --result "YES" --color GREEN
else
Display --indent 2 --text "- ${GEN_DEBUG_MODE}" --result "NO" --color RED
fi
fi
#
#################################################################################
#
# Plugins
if [ ${SKIP_PLUGINS} -eq 0 ]; then
N_PLUGIN=0
N_PLUGIN_ENABLED=0
# Plugins function
RunPlugins() {
if [ $# -eq 0 ]; then echo "RunPlugins should be started with phase number"; ExitFatal; fi
PLUGIN_PHASE=$1
if [ ${PLUGIN_PHASE} -eq 0 -o ${PLUGIN_PHASE} -gt 2 ]; then echo "Incorrect phase number when calling RunPlugins"; ExitFatal; fi
LogTextBreak
InsertPluginSection "Plugins (${GEN_PHASE} ${PLUGIN_PHASE})"
if [ ${PLUGIN_PHASE} -eq 1 ]; then
Display --text "${NOTE_PLUGINS_TAKE_TIME}"
Display --text " "
LogText "Searching plugins..."
fi
# Search plugins
FIND_PLUGINS=$(find ${PLUGINDIR} -type f -name "plugin_[a-z]*_phase${PLUGIN_PHASE}" | sort)
for PLUGIN_FILE in ${FIND_PLUGINS}; do
LogText "Found plugin file: ${PLUGIN_FILE}"
# Double check if output is a valid file name
if [ -f ${PLUGIN_FILE} ]; then
FIND2=$(grep "^# PLUGIN_NAME=" ${PLUGIN_FILE} | awk -F= '{ print $2 }')
if [ ! "${FIND2}" = "" -a ! "${FIND2}" = "[plugin_name]" ]; then
if [ ${PLUGIN_PHASE} -eq 1 ]; then N_PLUGIN=$((N_PLUGIN + 1)); fi
# Check if the plugin is enabled in any of the profiles
PLUGIN_ENABLED_STATE=0
for PROFILE in ${PROFILES}; do
LogText "Action: checking plugin status in profile: ${PROFILE}"
FIND3=$(grep "^plugin=${FIND2}" ${PROFILE})
if [ -n "${FIND3}" ]; then
FOUND=0
for I in ${DISABLED_PLUGINS}; do
if [ "${I}" = "${FIND2}" ]; then
FOUND=1
LogText "Result: plugin ${FIND2} is specifically disabled"
fi
done
if [ ${FOUND} -eq 0 ]; then
LogText "Result: plugin enabled in profile (${PROFILE})"
PLUGIN_ENABLED_STATE=1
fi
fi
done
if [ ${PLUGIN_ENABLED_STATE} -eq 1 ]; then
LogText "Result: plugin ${FIND2} is enabled"
PLUGINFILE="${PLUGINDIR}/plugin_${FIND2}_phase${PLUGIN_PHASE}"
if [ -f ${PLUGINFILE} ]; then
PLUGIN_VERSION=$(grep "^# PLUGIN_VERSION=" ${PLUGIN_FILE} | awk -F= '{ print $2 }')
PLUGIN_VERSION_NODOTS=$(echo ${PLUGIN_VERSION} | sed 's/.//g')
if SafePerms ${PLUGINFILE}; then
LogText "Including plugin file: ${PLUGINFILE} (version: ${PLUGIN_VERSION})"
Report "plugin_enabled_phase${PLUGIN_PHASE}[]=${FIND2}|${PLUGIN_VERSION}|"
if [ ${PLUGIN_PHASE} -eq 1 ]; then N_PLUGIN_ENABLED=$((N_PLUGIN_ENABLED + 1)); fi
Display --indent 2 --text "- ${CYAN}Plugin${NORMAL}: ${WHITE}${FIND2}${NORMAL}"
if [ ${PLUGIN_PHASE} -eq 1 ]; then Progress " ["; fi
. ${PLUGINFILE}
if [ ${PLUGIN_PHASE} -eq 1 ]; then Progress "]"; Progress --finish; fi
LogTextBreak
LogText "Result: ${FIND2} plugin (phase ${PLUGIN_PHASE}) finished"
else
LogText "Plugin ${FIND2}: Skipped (bad file permissions, should be 644, 640, 600 or 400)"
fi
else
LogText "Plugin ${FIND2}: Skipped for phase ${PLUGIN_PHASE} (no file found: ${PLUGINFILE})"
fi
else
LogText "Plugin ${FIND2}: Skipped (not enabled)"
fi
else
LogText "Skipping plugin file ${PLUGIN_FILE} (no valid plugin name found)"
fi
fi
LogText "--"
done
LogText "Result: Found ${N_PLUGIN} plugins of which ${N_PLUGIN_ENABLED} are enabled"
LogText "Result: Plugins phase ${PLUGIN_PHASE} finished"
}
RunPlugins 1
if [ ${N_PLUGIN_ENABLED} -eq 0 ]; then
Display --indent 2 --text "- ${GEN_PLUGINS_ENABLED}" --result "NONE" --color WHITE
Report "plugins_enabled=0"
else
Report "plugins_enabled=1"
fi
fi
#
#################################################################################
#
# Get host ID
LogTextBreak
GetHostID
# Check if result is not empty (no blank, or hash of blank value, or minus, or zeros)
if [ ! "${HOSTID}" = "-" -a ! "${HOSTID}" = "" -a ! "${HOSTID}" = "adc83b19e793491b1c6ea0fd8b46cd9f32e592fc" -a ! "${HOSTID}" = "6ef1338f520d075957424741d7ed35ab5966ae97" ]; then
LogText "Info: found valid HostID ${HOSTID}"
Report "hostid=${HOSTID}"
else
LogText "Info: no HostID found or invalid one"
fi
if [ ! "${HOSTID2}" = "" ]; then
Report "hostid2=${HOSTID2}"
fi
if [ ! "${MACHINEID}" = "" ]; then
LogText "Info: found a machine ID ${MACHINEID}"
Report "machineid=${MACHINEID}"
else
LogText "Info: no machine ID found"
fi
#
#################################################################################
#
if [ ${RUN_TESTS} -eq 1 ]; then
LogTextBreak
# Test sections
if [ "${TEST_GROUP_TO_CHECK}" = "all" ]; then
LogText "Info: perform tests from all categories"
INCLUDE_TESTS="boot_services kernel memory_processes authentication shells \
filesystems usb storage storage_nfs nameservices dns ports_packages networking printers_spools \
mail_messaging firewalls webservers ssh snmp databases ldap php squid logging \
insecure_services banners scheduling accounting time crypto virtualization containers \
mac_frameworks file_integrity tooling malware file_permissions homedirs \
kernel_hardening hardening"
else
INCLUDE_TESTS="${TEST_GROUP_TO_CHECK}"
LogText "Info: only performing tests from groups: ${TEST_GROUP_TO_CHECK}"
fi
# Include available tests
for INCLUDE_TEST in ${INCLUDE_TESTS}; do
INCLUDE_FILE="${INCLUDEDIR}/tests_${INCLUDE_TEST}"
if [ -f ${INCLUDE_FILE} ]; then
if SafeFile ${INCLUDE_FILE}; then
. ${INCLUDE_FILE}
else
LogText "Exception: skipping test category ${INCLUDE_TEST}, file ${INCLUDE_FILE} has bad permissions (should be 640, 600 or 400)"
ReportWarning "NONE" "Invalid permissions on tests file tests_${INCLUDE_TEST}"