lynis/include/tests_insecure_services

#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2017, 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.
#
#################################################################################
#
# Unsecure services
#
#################################################################################
#
    InsertSection "Insecure services"
#
#################################################################################
#
    INETD_ACTIVE=0
    INETD_CONFIG_FILE="${ROOTDIR}etc/inetd.conf"
#
#################################################################################
#
    # Test        : INSE-8002
    # Description : Check for inetd status
    Register --test-no INSE-8002 --weight L --network NO --category security --description "Check for enabled inet daemon"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Check running processes
        LogText "Test: Searching for active inet daemon"
        IsRunning inetd
        if [ ${RUNNING} -eq 1 ]; then
            LogText "Result: inetd is running"
            Display --indent 2 --text "- Checking inetd status" --result "ACTIVE" --color GREEN
            INETD_ACTIVE=1
        else
            LogText "Result: inetd is NOT running"
            Display --indent 2 --text "- Checking inetd status" --result "NOT ACTIVE" --color GREEN
        fi
    fi
#
#################################################################################
#
    # Test        : INSE-8004
    # Description : Check for inetd configuration file
    if [ ${INETD_ACTIVE} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no INSE-8004 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for enabled inet daemon"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Check configuration file
        LogText "Test: Searching for file ${INETD_CONFIG_FILE}"
        if [ -f ${INETD_CONFIG_FILE} ]; then
            LogText "Result: ${INETD_CONFIG_FILE} exists"
            Display --indent 4 --text "- Checking inetd.conf" --result "${STATUS_FOUND}" --color WHITE
        else
            LogText "Result: ${INETD_CONFIG_FILE} does not exist"
            Display --indent 4 --text "- Checking inetd.conf" --result "${STATUS_NOT_FOUND}" --color WHITE
        fi
    fi
#
#################################################################################
#
    # Test        : INSE-8006
    # Description : Check for inetd configuration file contents if inetd is NOT active
    if [ ${INETD_ACTIVE} -eq 0 -a -f ${INETD_CONFIG_FILE} ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no INSE-8006 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check configuration of inetd when disabled"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Check if any service is enabled in /etc/inetd.conf (inetd is not active, see test 8002)
        LogText "Test: check if all services are disabled if inetd is disabled"
        FIND=$(${GREPBINARY} -v "^#" ${INETD_CONFIG_FILE} | ${GREPBINARY} -v "^$")
        if [ -z "${FIND}" ]; then
            LogText "Result: no services found in ${INETD_CONFIG_FILE}"
            Display --indent 4 --text "- Checking inetd.conf services" --result "${STATUS_OK}" --color GREEN
        else
            LogText "Result: found services in inetd, even though inetd is not running"
            Display --indent 4 --text "- Checking inetd.conf services" --result "${STATUS_SUGGESTION}" --color YELLOW
            ReportSuggestion ${TEST_NO} "Although inetd is not running, make sure no services are enabled in ${INETD_CONFIG_FILE}, or remove inetd service"
        fi
    fi
#
#################################################################################
#
    # Test        : INSE-8016
    # Description : Check for telnet enabled via inetd
    if [ ${INETD_ACTIVE} -eq 1 -a -f ${INETD_CONFIG_FILE} ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no INSE-8016 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Check for telnet via inetd"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: checking telnet presence in inetd configuration"
        FIND=$(${GREPBINARY} "^telnet" ${INETD_CONFIG_FILE})
        if [ "${FIND}" = "" ]; then
            LogText "Result: telnet not enabled in ${INETD_CONFIG_FILE}"
            Display --indent 2 --text "- Checking inetd (telnet)" --result "${STATUS_NOT_FOUND}" --color GREEN
            AddHP 3 3
        else
            LogText "Result: telnet enabled in ${INETD_CONFIG_FILE}"
            Display --indent 2 --text "- Checking inetd (telnet)" --result "${STATUS_WARNING}" --color RED
            ReportSuggestion "${TEST_NO}" "Disable telnet in inetd configuration and use SSH instead"
            AddHP 1 3
        fi
    fi
#
#################################################################################
#
    if [ ! -z "${LAUNCHCTL_BINARY}" ]; then PREQS_MET="YES"; SKIPREASON=""; else PREQS_MET="NO"; SKIPREASON="No launchctl binary on this system"; fi
    Register --test-no INSE-8050 --os "macOS" --preqs-met ${PREQS_MET} --skip-reason "${SKIPREASON}" --weight M --network NO --category security --description "Check for insecure services on macOS"
    if [ ${SKIPTEST} -eq 0 ]; then
        TEST_SERVICES="com.apple.fingerd"
        for ITEM in ${TEST_SERVICES}; do
            if ${LAUNCHCTL_BINARY} print-enabled system | grep -sq ${ITEM}; then
                Display --indent 2 --text "- $text" --result "${STATUS_NO}" --color RED
                LogText "Result: found ${ITEM}, which is considered an insecure service"
                AddSuggestion "${TEST_NO}" "Consider disabling service ${ITEM}" "launchctl" "-"
                AddHP 0 1
            else
                Display --indent 2 --text "- $text" --result "${STATUS_OK}" --color GREEN
                LogText "Result: $text, OK"
                AddHP 1 1
            fi
        done
    fi
#
#################################################################################
#

# To do:
# - mark in report when a system was tested for any insecure services

WaitForKeyPress

#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com