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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.
#
#################################################################################
#
ANSIBLE_ARTIFACT_FOUND=0
AUTOMATION_TOOL_FOUND=0
AUTOMATION_TOOL_RUNNING=""
CFENGINE_AGENT_FOUND=0
CFENGINE_SERVER_RUNNING=0
BACKUP_AGENT_FOUND=0
PUPPET_MASTER_RUNNING=0
SALT_MASTER_RUNNING=0
SALT_MINION_RUNNING=0
IDS_IPS_TOOL_FOUND=0
FAIL2BAN_FOUND=0
FAIL2BAN_EMAIL=0
FAIL2BAN_SILENT=0
PERFORM_FAIL2BAN_TESTS=0
SNORT_FOUND=0
SNORT_RUNNING=0
#
#################################################################################
#
InsertSection "${SECTION_SYSTEM_TOOLING}"
#
#################################################################################
#
# Automation
#
#################################################################################
#
# Test : TOOL-5002
# Description : Check if automation tools are found
Register --test-no TOOL-5002 --weight L --network NO --category security --description "Checking for automation tools"
if [ ${SKIPTEST} -eq 0 ]; then
Display --indent 2 --text "- Checking automation tooling"
# Ansible
FOUND=0
LIST="${HOME}/.ansible ${ROOTDIR}etc/ansible ${ROOTDIR}root/.ansible ${ROOTDIR}tmp/.ansible"
for ITEM in ${LIST}; do if DirectoryExists ${ITEM}; then FOUND=1; break; fi; done
# Test for files (only if no match was found)
if [ ${FOUND} -eq 0 ]; then
LIST="${ROOTDIR}var/log/ansible.log ~/.ansible-retry"
for ITEM in ${LIST}; do if FileExists ${ITEM}; then FOUND=1; break; fi; done
fi
if [ ${FOUND} -eq 1 ]; then
LogText "Result: found a possible trace of Ansible"
AUTOMATION_TOOL_FOUND=1
ANSIBLE_ARTIFACT_FOUND=1
Report "automation_tool_running[]=ansible"
Display --indent 4 --text "- Ansible artifact" --result "${STATUS_FOUND}" --color GREEN
fi
# Cfengine
if [ -n "${CFAGENTBINARY}" ]; then
LogText "Result: CFEngine (cfagent) is installed (${CFAGENTBINARY})"
AUTOMATION_TOOL_FOUND=1
CFENGINE_AGENT_FOUND=1
Report "automation_tool_running[]=cf-agent"
Display --indent 4 --text "- Cfengine (cfagent)" --result "${STATUS_FOUND}" --color GREEN
fi
OTHER_CFENGINE_LOCATIONS="/var/cfengine/bin /var/rudder/cfengine-community/bin"
for I in ${OTHER_CFENGINE_LOCATIONS}; do
if [ -d ${I} ]; then
if [ -f ${I}/cf-agent ]; then
LogText "Result: found CFEngine agent (cf-agent) in ${I}"
AUTOMATION_TOOL_FOUND=1
CFENGINE_AGENT_FOUND=1
Report "automation_tool_running[]=cf-agent"
Display --indent 4 --text "- CFEngine (cf-agent)" --result "${STATUS_FOUND}" --color GREEN
fi
if IsRunning "cf-server"; then
LogText "Result: found CFEngine server"
AUTOMATION_TOOL_FOUND=1
CFENGINE_SERVER_RUNNING=1
Report "automation_tool_running[]=cf-server"
Display --indent 4 --text "- CFEngine (cf-server)" --result "${STATUS_FOUND}" --color GREEN
fi
fi
done
# Chef
CHEF_LOCATIONS="/opt/chef/bin /opt/chef-server/sv /opt/chefdk/bin"
for I in ${CHEF_LOCATIONS}; do
if [ -d ${I} ]; then
if [ -f ${I}/chef-client ]; then
CHEFCLIENTBINARY="${I}/chef-client"
AUTOMATION_TOOL_FOUND=1
Report "automation_tool_running[]=chef-client"
Display --indent 4 --text "- Chef client (chef-client)" --result "${STATUS_FOUND}" --color GREEN
LogText "Result: found chef-client (chef client daemon) in ${I}"
fi
if [ -f ${I}/erchef ]; then
CHEFSERVERBINARY="${I}/erchef"
LogText "Result: Chef Server (erchef) is installed (${CHEFSERVERBINARY})"
AUTOMATION_TOOL_FOUND=1
Report "automation_tool_running[]=chef-server"
Display --indent 4 --text "- Chef Server (erchef)" --result "${STATUS_FOUND}" --color GREEN
LogText "Result: found erchef (chef server daemon) in ${I}"
fi
fi
done
# Puppet
# Check for Puppet installation provided by Puppetlabs package
if [ -z "${PUPPETBINARY}" ]; then
if [ -f ${ROOTDIR}opt/puppetlabs/puppet/bin/puppet ]; then
PUPPETBINARY="${ROOTDIR}opt/puppetlabs/puppet/bin/puppet"
fi
fi
if [ -n "${PUPPETBINARY}" ]; then
LogText "Result: Puppet is installed (${PUPPETBINARY})"
AUTOMATION_TOOL_FOUND=1
Report "automation_tool_running[]=puppet-agent"
Display --indent 4 --text "- Puppet (agent)" --result "${STATUS_FOUND}" --color GREEN
fi
if IsRunning --full "puppet master"; then
LogText "Result: found puppet master"
AUTOMATION_TOOL_FOUND=1
PUPPET_MASTER_RUNNING=1
Report "automation_tool_running[]=puppet-master"
Display --indent 4 --text "- Puppet (master)" --result "${STATUS_FOUND}" --color GREEN
fi
# SaltStack
if [ -n "${SALTMINIONBINARY}" ]; then
Display --indent 4 --text "- SaltStack minion" --result "${STATUS_FOUND}" --color GREEN
LogText "Result: SaltStack (salt-minion) is installed (${SALTMINIONBINARY})"
AUTOMATION_TOOL_FOUND=1
Report "automation_tool_installed[]=saltstack-minion"
if IsRunning "salt-minion" --user "root salt"; then
Display --indent 6 --text "- Minion process" --result "${STATUS_RUNNING}" --color GREEN
LogText "Result: found SaltStack (master)"
SALT_MINION_RUNNING=1
Report "automation_tool_running[]=saltstack-minion"
else
Display --indent 6 --text "- Minion process" --result "${STATUS_NOT_RUNNING}" --color YELLOW
fi
fi
if [ -n "${SALTMASTERBINARY}" ]; then
Display --indent 4 --text "- SaltStack master (salt-master)" --result "${STATUS_FOUND}" --color GREEN
LogText "Result: SaltStack (salt-master) is installed (${SALTMASTERBINARY})"
AUTOMATION_TOOL_FOUND=1
Report "automation_tool_installed[]=saltstack-master"
if IsRunning "salt-master" --user "root salt"; then
Display --indent 6 --text "- Master process" --result "${STATUS_RUNNING}" --color GREEN
LogText "Result: found SaltStack (master)"
SALT_MASTER_RUNNING=1
Report "automation_tool_running[]=saltstack-master"
else
Display --indent 6 --text "- Master process" --result "${STATUS_NOT_RUNNING}" --color YELLOW
fi
fi
if [ ${AUTOMATION_TOOL_FOUND} -eq 1 ]; then
Display --indent 2 --text "- Automation tooling" --result "${STATUS_FOUND}" --color GREEN
else
Display --indent 2 --text "- Automation tooling" --result "${STATUS_NOT_FOUND}" --color YELLOW
ReportSuggestion "${TEST_NO}" "Determine if automation tools are present for system management"
fi
fi
#
#################################################################################
#
# Intrusion Detection and Prevention tools
#
#################################################################################
#
# Test : TOOL-5102
# Description : Check for Fail2ban
Register --test-no TOOL-5102 --weight L --network NO --category security --description "Check for presence of Fail2ban"
if [ ${SKIPTEST} -eq 0 ]; then
# Fail2ban presence
if [ -n "${FAIL2BANBINARY}" ]; then
FAIL2BAN_FOUND=1
IDS_IPS_TOOL_FOUND=1
LogText "Result: Fail2ban is installed (${FAIL2BANBINARY})"
Report "ids_ips_tooling[]=fail2ban"
Display --indent 2 --text "- Checking presence of Fail2ban" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: Fail2ban not present (fail2ban-server not found)"
fi
# Fail2ban configuration
LogText "Checking Fail2ban configuration file"
if [ -f /etc/fail2ban/jail.local ]; then
FAIL2BAN_CONFIG="/etc/fail2ban/jail.local"
elif [ -f /etc/fail2ban/jail.conf ]; then
FAIL2BAN_CONFIG="/etc/fail2ban/jail.conf"
else
FAIL2BAN_CONFIG=""
fi
# Continue if tooling is available and configuration file found
if [ ${FAIL2BAN_FOUND} -eq 1 -a -n "${FAIL2BAN_CONFIG}" ]; then
Report "fail2ban_config=${FAIL2BAN_CONFIG}"
FAIL2BANCLIENT=$(which fail2ban-client 2> /dev/null | grep -v "no [^ ]* in ")
if [ -n "${FAIL2BANCLIENT}" ]; then PERFORM_FAIL2BAN_TESTS=1; fi
fi
fi
#
#################################################################################
#
# Test : TOOL-5104
# Description : Check for Fail2ban enabled tests
if [ ${PERFORM_FAIL2BAN_TESTS} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no TOOL-5104 --weight L --network NO --preqs-met ${PREQS_MET} --category security --description "Enabled tests in Fail2ban"
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${FAIL2BANCLIENT} -d | ${TRBINARY} -d '[]' | ${TRBINARY} -d "'" | ${AWKBINARY} -F, '{ if ($1=="add") { print $2 }}' | ${TRBINARY} -d ' ')
if [ -n "${FIND}" ]; then
for F2BSERVICE in ${FIND}; do
LogText "Result: service '${F2BSERVICE}' enabled"
Report "fail2ban_enabled_service[]=${F2BSERVICE}"
done
LogText "Result: found at least one enabled jail"
Display --indent 4 --text "- Checking Fail2ban jails" --result "${STATUS_ENABLED}" --color GREEN
AddHP 3 3
else
LogText "Result: Fail2ban installed but completely disabled"
Display --indent 4 --text "- Checking Fail2ban jails" --result "${STATUS_DISABLED}" --color RED
AddHP 0 5
ReportWarning "${TEST_NO}" "All jails in Fail2ban are disabled" "${FAIL2BAN_CONFIG}"
fi
fi
#
#################################################################################
#
# These tests are temporarily disabled to split them up in different areas to check
#
# LogText "Result: found configuration file (${FAIL2BAN_CONFIG})"
#
# # Check email alert configuration
# LogText "Test: checking for email actions within ${FAIL2BAN_CONFIG}"
#
# FIND=$(${GREPBINARY} -E "^action = \%\(action_m.*\)s" ${FAIL2BAN_CONFIG})
# FIND2=$(${GREPBINARY} -E "^action = \%\(action_\)s" ${FAIL2BAN_CONFIG})
#
# if [ -n "${FIND}" ]; then
# FAIL2BAN_EMAIL=1
# LogText "Result: found at least one jail which sends an email alert"
# fi
#
# if [ -n "${FIND2}" ]; then
# FAIL2BAN_SILENT=1
# LogText "Result: found at least one jail which does NOT send an email alert"
# fi
#
# if [ ${FAIL2BAN_SILENT} -eq 0 ] && [ ${FAIL2BAN_EMAIL} -eq 0 ]; then
# LogText "No registered actions found in ${FAIL2BAN_CONFIG}"
# Display --indent 4 --text "- Checking Fail2ban actions" --result "${STATUS_NONE}" --color RED
# ReportWarning "${TEST_NO}" "${FAIL2BAN_CONFIG}" "There are no actions configured for Fail2ban."
# AddHP 0 3
# fi
#
# if [ ${FAIL2BAN_SILENT} -eq 0 ] && [ ${FAIL2BAN_EMAIL} -eq 1 ]; then
# LogText "All actions in ${FAIL2BAN_CONFIG} are configured to send email alerts"
# Display --indent 4 --text "- Checking Fail2ban actions" --result "${STATUS_OK}" --color GREEN
# AddHP 3 3
# fi
#
# if [ ${FAIL2BAN_SILENT} -eq 1 ] && [ ${FAIL2BAN_EMAIL} -eq 1 ]; then
# LogText "Some actions found in ${FAIL2BAN_CONFIG} are configured to send email alerts"
# Display --indent 4 --text "- Checking Fail2ban actions" --result PARTIAL --color YELLOW
# ReportSuggestion "${TEST_NO}" "Some Fail2ban jails are configured with non-notified actions. Consider changing these to emailed alerts."
# AddHP 2 3
# fi
#
# if [ ${FAIL2BAN_SILENT} -eq 1 ] && [ ${FAIL2BAN_EMAIL} -eq 0 ]; then
# LogText "None of the actions found in ${FAIL2BAN_CONFIG} are configured to send email alerts"
# Display --indent 4 --text "- Checking Fail2ban actions" --result "${STATUS_NONE}" --color YELLOW
# ReportSuggestion "${TEST_NO}" "None of the Fail2ban jails are configured to send email notifications. Consider changing these to emailed alerts."
# AddHP 1 3
# fi
#
# # Check at least one enabled jail
# LogText "Checking for enabled jails within ${FAIL2BAN_CONFIG}"
#
#
#
# # Confirm at least one iptables chain for fail2ban
#
# LogText "Checking for fail2ban iptables chains"
#
# if [ -n "${IPTABLESBINARY}" ]; then
# CHECK_CHAINS=$(${IPTABLESBINARY} -L 2>&1 | ${GREPBINARY} fail2ban)
# if [ -n "${CHECK_CHAINS}" ]; then
# LogText "Result: found at least one iptables chain for fail2ban"
# Display --indent 4 --text "- Checking for Fail2ban iptables chain" --result "${STATUS_OK}" --color GREEN
# else
# LogText "Result: Fail2ban installed but iptables chain not present - fail2ban will not work"
# Display --indent 4 --text "- Checking for Fail2ban iptables chain" --result "${STATUS_WARNING}" --color RED
# AddHP 0 3
# ReportSuggestion "${TEST_NO}" "Check config to see why iptables does not have a fail2ban chain" "${FAIL2BAN_CONFIG}"
# fi
# else
# Display --indent 4 --text "- Checking for Fail2ban iptables chain" --result "${STATUS_WARNING}" --color RED
# ReportSuggestion "${TEST_NO}" "iptables doesn't seem to be installed; Fail2ban will not work. Remove Fail2ban or install iptables" "${FAIL2BAN_CONFIG}"
# fi
# fi
# fi
#
#################################################################################
#
# Test : TOOL-5120
# Description : Check for Snort
Register --test-no TOOL-5120 --weight L --network NO --category security --description "Check for presence of Snort"
if [ ${SKIPTEST} -eq 0 ]; then
# Snort presence
if [ -n "${SNORTBINARY}" ]; then
SNORT_FOUND=1
IDS_IPS_TOOL_FOUND=1
LogText "Result: Snort is installed (${SNORTBINARY})"
Report "ids_ips_tooling[]=snort"
Display --indent 2 --text "- Checking presence of Snort" --result "${STATUS_FOUND}" --color GREEN
fi
if IsRunning "snort"; then
SNORT_FOUND=1
SNORT_RUNNING=1
SNORT_LOG=$(${PSBINARY} | ${AWKBINARY} -F-.. '/snort/ {print $4}' | ${HEADBINARY} -1)
else
LogText "Result: Snort not present (Snort not running)"
fi
fi
#
#################################################################################
#
# Test : TOOL-5122
# Description : Check for Snort configuration
Register --test-no TOOL-5122 --weight L --network NO --category security --description "Check Snort configuration file"
if [ ${SKIPTEST} -eq 0 ]; then
# Continue if tooling is available and snort is running
if [ -n "${SNORT_FOUND}" ] || [ -n "${SNORT_RUNNING}" ]; then
if [ ${SNORT_FOUND} -eq 1 ] && [ ${SNORT_RUNNING} -eq 1 ]; then
SNORT_CONFIG=$(${PSBINARY} | ${AWKBINARY} -F-.. '/snort/ {print $3}' | ${HEADBINARY} -1)
if HasData "${SNORT_CONFIG}"; then
LogText "Result: found Snort configuration file: ${SNORT_CONFIG}"
Report "snort_config=${SNORT_CONFIG}"
fi
SNORT=$(which snort 2> /dev/null)
fi
fi
fi
#
#################################################################################
#
# Test : TOOL-5130
# Description : Check for Suricata
Register --test-no TOOL-5130 --weight L --network NO --category security --description "Check for active Suricata daemon"
if [ ${SKIPTEST} -eq 0 ]; then
# Suricata presence
if [ -n "${SURICATABINARY}" ]; then
Report "ids_ips_tooling[]=suricata"
LogText "Result: Suricata is installed (${SURICATABINARY})"
# Suricata status
# Suricata sets its process name to Suricata-Main on Linux, but this might differ on other platforms,
# so fall back to checking the full commandline instead if the first test fails
if IsRunning "Suricata-Main" || IsRunning --full "${SURICATABINARY} "; then
# Only satisfy test TOOL-5190 if Suricata is actually running
IDS_IPS_TOOL_FOUND=1
LogText "Result: Suricata daemon is active"
Display --indent 2 --text "- Checking Suricata status" --result "${STATUS_RUNNING}" --color GREEN
else
LogText "Result: Suricata daemon not active"
Display --indent 2 --text "- Checking Suricata status" --result "${STATUS_NOT_RUNNING}" --color YELLOW
fi
else
LogText "Result: Suricata not installed (suricata not found)"
fi
fi
#
#################################################################################
#
# Test : TOOL-5126
# Description : Check for OSSEC
Register --test-no TOOL-5126 --weight L --network NO --category security --description "Check for active OSSEC daemon"
if [ ${SKIPTEST} -eq 0 ]; then
# Server side
if IsRunning "ossec-analysisd"; then
IDS_IPS_TOOL_FOUND=1
Report "ids_ips_tooling[]=ossec"
Report "ids_ips_tooling[]=ossec-analysisd"
LogText "Result: OSSEC analysis daemon is active"
Display --indent 2 --text "- Checking presence of OSSEC (analysis)" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: OSSEC analysis daemon not active"
fi
# Client side
if IsRunning "ossec-agentd"; then
IDS_IPS_TOOL_FOUND=1
Report "ids_ips_tooling[]=ossec"
Report "ids_ips_tooling[]=ossec-agentd"
LogText "Result: OSSEC agent daemon is active"
Display --indent 2 --text "- Checking presence of OSSEC (agent)" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: OSSEC agent daemon not active"
fi
fi
#
#################################################################################
#
# Test : TOOL-5128
# Description : Check for Wazuh daemon
Register --test-no TOOL-5128 --weight L --network NO --category security --description "Check for active Wazuh daemon"
if [ ${SKIPTEST} -eq 0 ]; then
# Server side
if IsRunning "wazuh-analysisd"; then
IDS_IPS_TOOL_FOUND=1
Report "ids_ips_tooling[]=wazuh"
Report "ids_ips_tooling[]=wazuh-analysisd"
LogText "Result: Wazuh analysis daemon is active"
Display --indent 2 --text "- Checking presence of Wazuh (analysis)" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: Wazuh analysis daemon not active"
fi
# Client side
if IsRunning "wazuh-agentd"; then
IDS_IPS_TOOL_FOUND=1
Report "ids_ips_tooling[]=wazuh"
Report "ids_ips_tooling[]=wazuh-agentd"
LogText "Result: Wazuh agent daemon is active"
Display --indent 2 --text "- Checking presence of Wazuh (agent)" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: Wazuh agent daemon not active"
fi
fi
#
#################################################################################
#
# Test : TOOL-5190
# Description : Check for an IDS/IPS tool
Register --test-no TOOL-5190 --weight L --network NO --category security --description "Check presence of IDS/IPS tool"
if [ ${SKIPTEST} -eq 0 ]; then
if [ ${IDS_IPS_TOOL_FOUND} -eq 1 ]; then
Display --indent 2 --text "- Checking for IDS/IPS tooling" --result "${STATUS_FOUND}" --color GREEN
AddHP 2 2
else
Display --indent 2 --text "- Checking for IDS/IPS tooling" --result "${STATUS_NONE}" --color YELLOW
#ReportSuggestion "${TEST_NO}" "Install and configure automated intrusion detection/prevention tools"
AddHP 0 2
fi
fi
#
#################################################################################
#
# Backup tools
#
#################################################################################
#
# Netvault
# Rsync in cron
#
#################################################################################
#
Report "automation_tool_present=${AUTOMATION_TOOL_FOUND}"
WaitForKeyPress
#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com