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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2021, 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.
#
#################################################################################
#
# Containers, Zones, Jails
#
#################################################################################
#
InsertSection "${SECTION_CONTAINERS}"
#
#################################################################################
#
DOCKER_CONTAINERS_RUNNING=0
DOCKER_CONTAINERS_TOTAL=0
DOCKER_FILE_PERMISSIONS_WARNINGS=0
RUN_DOCKER_TESTS=0
#
#################################################################################
#
# Test : CONT-8004
# Description : Query running Solaris zones
if [ -x ${ROOTDIR}usr/sbin/zoneadm ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CONT-8004 --os Solaris --weight L --network NO --category security --description "Query running Solaris zones"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: query zoneadm to list all running zones"
FIND=$(${ROOTDIR}usr/sbin/zoneadm list -p | ${AWKBINARY} -F: '{ if ($2!="global") print $0 }')
if [ -n "${FIND}" ]; then
COUNT=0
for ITEM in ${FIND}; do
COUNT=$((COUNT + 1))
ZONEID=$(echo ${ITEM} | ${CUTBINARY} -d ':' -f1)
ZONENAME=$(echo ${ITEM} | ${CUTBINARY} -d ':' -f2)
LogText "Result: found zone ${ZONENAME} (running)"
Report "solaris_running_zone[]=${ZONENAME} [id:${ZONEID}]"
done
LogText "Result: total of ${COUNT} running zones"
Display --indent 2 --text "- Checking Solaris Zones" --result "FOUND ${COUNT} zones" --color GREEN
else
LogText "Result: no running zones found"
Display --indent 2 --text "- Checking Solaris Zones" --result "${STATUS_NONE}" --color WHITE
fi
fi
#
#################################################################################
#
# Do you have Xen running? Help us testing this test and submit a pull request on GitHub
# Test : CONT-1906 TODO
# Description : Query running Xen zones
#if [ -x /usr/bin/xm ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
#Register --test-no CONT-1906 --weight L --network NO --category security --description "Query Xen guests"
#if [ ${SKIPTEST} -eq 0 ]; then
# Show Xen guests
#FIND=$(xm list | ${AWKBINARY} '$1 != "Name|Domain-0" {print $1","$2}')
#for I in ${FIND}; do
#XENGUESTNAME=$(echo ${I} | ${CUTBINARY} -d ':' -f1)
#XENGUESTID=$(echo ${I} | ${CUTBINARY} -d ':' -f2)
#LogText "Result: found Xen guest ${XENGUESTNAME} (ID: ${XENGUESTID})"
#done
#fi
#
#################################################################################
#
# Test : CONT-8102
# Description : Checking Docker daemon status and basic information for later tests
Register --test-no CONT-8102 --weight L --network NO --category security --description "Checking Docker status and information"
if [ ${SKIPTEST} -eq 0 ]; then
if IsRunning "dockerd"; then
LogText "Result: found Docker daemon running"
Report "docker_daemon_running=1"
DOCKER_DAEMON_RUNNING=1
RUN_DOCKER_TESTS=1
Display --indent 4 --text "- Docker"
Display --indent 6 --text "- Docker daemon" --result "${STATUS_RUNNING}" --color GREEN
fi
fi
#
#################################################################################
#
# Test : CONT-8104
# Description : Checking Docker info for any warnings
# Notes : Hardening points are awarded, as usually warnings are the result of missing controls to restrict boundaries like memory
if HasData "${DOCKERBINARY}"; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CONT-8104 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking Docker info for any warnings"
if [ ${SKIPTEST} -eq 0 ]; then
COUNT=0
LogText "Test: Check for any warnings"
FIND=$(${DOCKERBINARY} version 2>&1)
if [ $? -gt 0 ]; then
Display --indent 8 --text "- Docker status" --result "${STATUS_ERROR}" --color RED
LogText "Result: disabling further Docker tests as docker version gave exit code other than zero (0)"
RUN_DOCKER_TESTS=0
fi
FIND=$(${DOCKERBINARY} info 2>&1 | ${GREPBINARY} "^WARNING:" | ${CUTBINARY} -d " " -f 2- | ${SEDBINARY} 's/ /:space:/g')
if [ ! "${FIND}" = "" ]; then
LogText "Result: found warning(s) in output"
for I in ${FIND}; do
J=$(echo ${I} | ${SEDBINARY} 's/:space:/ /g')
LogText "Output: ${J}"
COUNT=$((COUNT + 1))
done
Display --indent 8 --text "- Docker info output (warnings)" --result "${COUNT}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Run 'docker info' to see warnings applicable to Docker daemon"
AddHP 3 4
else
LogText "Result: no warnings found from 'docker info' output"
Display --indent 8 --text "- Docker info output (warnings)" --result "${STATUS_NONE}" --color GREEN
AddHP 1 1
fi
fi
#
#################################################################################
#
# Test : CONT-8106
# Description : Checking Docker containers (basic stats)
# Notes : Hardening points are awarded, if there aren't a lot of stopped containers
if [ -n "${DOCKERBINARY}" -a ${RUN_DOCKER_TESTS} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CONT-8106 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Gather basic stats from Docker"
if [ ${SKIPTEST} -eq 0 ]; then
Display --indent 6 --text "- Containers"
# Check total of containers
LogText "Test: checking total amount of Docker containers"
DOCKER_CONTAINERS_TOTAL=$(${DOCKERBINARY} info 2> /dev/null | ${GREPBINARY} -E "^[ \t]?Containers: " | ${AWKBINARY} '{ print $2 }')
if [ -z "${DOCKER_CONTAINERS_TOTAL}" ]; then
DOCKER_CONTAINERS_TOTAL=0
fi
LogText "Result: docker info shows ${DOCKER_CONTAINERS_TOTAL} containers"
DOCKER_CONTAINERS_TOTAL2=$(${DOCKERBINARY} ps -a 2> /dev/null | ${GREPBINARY} -c -v "CONTAINER")
LogText "Result: docker ps -a shows ${DOCKER_CONTAINERS_TOTAL2} containers"
if [ ! "${DOCKER_CONTAINERS_TOTAL}" = "${DOCKER_CONTAINERS_TOTAL2}" ]; then
LogText "Result: difference detected, which is unexpected"
ReportSuggestion "${TEST_NO}" "Test output of both 'docker ps -a' and 'docker info', to determine why they report a different amount of containers"
Display --indent 8 --text "- Total containers" --result "${STATUS_UNKNOWN}" --color RED
else
Display --indent 8 --text "- Total containers" --result "${DOCKER_CONTAINERS_TOTAL}" --color WHITE
fi
# Check running instances
DOCKER_CONTAINERS_RUNNING=$(${DOCKERBINARY} ps 2> /dev/null | ${GREPBINARY} -c -v "CONTAINER")
if [ ${DOCKER_CONTAINERS_RUNNING} -gt 0 ]; then
Display --indent 10 --text "- Running containers" --result "${DOCKER_CONTAINERS_RUNNING}" --color GREEN
LogText "Result: ${DOCKER_CONTAINERS_RUNNING} containers are currently active"
Report "docker_containers_running=${DOCKER_CONTAINERS_RUNNING}"
else
LogText "Result: no active containers"
Report "docker_containers_running=0"
fi
fi
#
#################################################################################
#
# Test : CONT-8107
# Description : Checking Docker number of unused containers
# Notes : Hardening points are awarded, if there aren't a lot of stopped containers
if [ -n "${DOCKERBINARY}" -a ${RUN_DOCKER_TESTS} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CONT-8107 --preqs-met ${PREQS_MET} --weight L --network NO --category performance --description "Check number of Docker containers"
if [ ${SKIPTEST} -eq 0 ]; then
# Check if there aren't too many unused containers on the system
if [ ${DOCKER_CONTAINERS_TOTAL} -gt 0 ]; then
DOCKER_CONTAINERS_UNUSED=$((DOCKER_CONTAINERS_TOTAL - DOCKER_CONTAINERS_RUNNING))
if [ ${DOCKER_CONTAINERS_UNUSED} -gt 10 ]; then
ReportSuggestion "${TEST_NO}" "More than 10 unused containers found on the system. Clean up old containers by using output of 'docker ps -a' command"
Display --indent 8 --text "- Unused containers" --result "${DOCKER_CONTAINERS_UNUSED}" --color RED
AddHP 0 2
else
LogText "Result: found ${DOCKER_CONTAINERS_UNUSED} unused containers"
Display --indent 8 --text "- Unused containers" --result "${DOCKER_CONTAINERS_UNUSED}" --color YELLOW
AddHP 1 1
fi
fi
fi
#
#################################################################################
#
# Test : CONT-8108
# Description : Checking Docker file permissions
# Notes : /var/run/docker.sock - Usually root as owner, docker as group - should not be world writable
if [ -n "${DOCKERBINARY}" -a ${RUN_DOCKER_TESTS} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no CONT-8108 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check file permissions for Docker files"
if [ ${SKIPTEST} -eq 0 ]; then
NOT_WORLD_WRITABLE="${ROOTDIR}var/run/docker.sock"
for FILE in ${NOT_WORLD_WRITABLE}; do
LogText "Test: Check ${FILE}"
if [ -f ${FILE} ]; then
LogText "Result: file ${FILE} found, permissions will be tested"
if IsWorldWritable ${FILE}; then
LogText "Result: file is writable by others, which is a security risk (e.g. privilege escalation)"
ReportWarning "${TEST_NO}" "Docker file is world writable" "${FILE}" "-"
DOCKER_FILE_PERMISSIONS_WARNINGS=$((DOCKER_FILE_PERMISSIONS_WARNINGS + 1))
else
LogText "Result: file ${FILE} is not writable by others, which is fine"
fi
fi
done
if [ ${DOCKER_FILE_PERMISSIONS_WARNINGS} -gt 0 ]; then
Display --indent 4 --text "- File permissions" --result "${STATUS_WARNING}"S --color YELLOW
AddHP 0 5
else
Display --indent 4 --text "- File permissions" --result "${STATUS_OK}" --color GREEN
AddHP 5 5
fi
fi
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Copyright 2007-2021, CISOfy - https://cisofy.com