FM / include

/usr/share/lynis/include

Name	Size	Mode	Actions
binaries	39476	0644	edit dl rm
consts	10898	0644	edit dl rm
data_upload	13788	0644	edit dl rm
functions	163241	0644	edit dl rm
helper_audit_dockerfile	8000	0644	edit dl rm
helper_configure	3748	0644	edit dl rm
helper_generate	7557	0644	edit dl rm
helper_show	22820	0644	edit dl rm
helper_system_remote_scan	3620	0644	edit dl rm
helper_update	3671	0644	edit dl rm
osdetection	48570	0644	edit dl rm
parameters	16874	0644	edit dl rm
profiles	27540	0644	edit dl rm
report	18915	0644	edit dl rm
tests_accounting	25852	0644	edit dl rm
tests_authentication	86063	0644	edit dl rm
tests_banners	8562	0644	edit dl rm
tests_boot_services	56034	0644	edit dl rm
tests_containers	11439	0644	edit dl rm
tests_crypto	19456	0644	edit dl rm
tests_custom.template	6942	0644	edit dl rm
tests_databases	24863	0644	edit dl rm
tests_dns	3467	0644	edit dl rm
tests_filesystems	50995	0644	edit dl rm
tests_file_integrity	22714	0644	edit dl rm
tests_file_permissions	3185	0644	edit dl rm
tests_firewalls	32270	0644	edit dl rm
tests_hardening	7187	0644	edit dl rm
tests_homedirs	9392	0644	edit dl rm
tests_insecure_services	27528	0644	edit dl rm
tests_kerberos	8063	0644	edit dl rm
tests_kernel	61403	0644	edit dl rm
tests_kernel_hardening	5752	0644	edit dl rm
tests_ldap	4055	0644	edit dl rm
tests_logging	33726	0644	edit dl rm
tests_mac_frameworks	15067	0644	edit dl rm
tests_mail_messaging	21967	0644	edit dl rm
tests_malware	21101	0644	edit dl rm
tests_memory_processes	7334	0644	edit dl rm
tests_nameservices	35361	0644	edit dl rm
tests_networking	41705	0644	edit dl rm
tests_php	29772	0644	edit dl rm
tests_ports_packages	83692	0644	edit dl rm
tests_printers_spoolers	14188	0644	edit dl rm
tests_scheduling	16131	0644	edit dl rm
tests_shells	13643	0644	edit dl rm
tests_snmp	4273	0644	edit dl rm
tests_squid	17156	0644	edit dl rm
tests_ssh	18026	0644	edit dl rm
tests_storage	3680	0644	edit dl rm
tests_storage_nfs	8603	0644	edit dl rm
tests_system_integrity	2098	0644	edit dl rm
tests_time	33413	0644	edit dl rm
tests_tooling	22624	0644	edit dl rm
tests_usb	21554	0644	edit dl rm
tests_virtualization	1992	0644	edit dl rm
tests_webservers	33977	0644	edit dl rm
tool_tips	2205	0644	edit dl rm

Edit: /usr/share/lynis/include/tests_homedirs (9392B)

#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright (c) Michael Boelen, CISOfy, and many contributors.
#
# Website  : https://cisofy.com
# Blog     : https://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.
#
#################################################################################
#
# Home directories
#
#################################################################################
#
    InsertSection "${SECTION_HOME_DIRECTORIES}"
#
#################################################################################
#
    # Ignore some top level directories (not the sub directories below)
    IGNORE_HOME_DIRS="/bin /boot /cdrom /dev /etc /home /lib /lib64 /media /mnt
                      /opt /proc /sbin /selinux /srv /sys /tmp /usr /var"
#
#################################################################################
#
    # Test        : HOME-9302
    # Description : Create list with home directories
    Register --test-no HOME-9302 --weight L --network NO --category security --description "Create list with home directories"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Read sixth field of /etc/passwd
        LogText "Test: query ${ROOTDIR}etc/passwd to obtain home directories"
        FIND=$(${AWKBINARY} -F: '{ if ($1 !~ "#") print $6 }' ${ROOTDIR}etc/passwd | ${SORTBINARY} -u)
        for I in ${FIND}; do
            if [ -d ${I} ]; then
                LogText "Result: found home directory: ${I} (directory exists)"
                Report "home_directory[]=${I}"
            else
                LogText "Result: found home directory: ${I} (directory does not exist)"
            fi
        done
    fi
#
#################################################################################
#
    # Test        : HOME-9304
    # Description : Check if users' home directories permissions are 750 or more restrictive
    Register --test-no HOME-9304 --weight L --network NO --category security --description "Check if users' home directories permissions are 750 or more restrictive"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Check if users' home directories permissions are 750 or more restrictive
        FOUND=0
        USERDATA=$(${GREPBINARY} -E -v '^(daemon|git|halt|root|shutdown|sync)' ${ROOTDIR}etc/passwd | ${AWKBINARY} -F: '($7 !~ "/(false|nologin)$") { print }')
        while read -r LINE; do
            USER=$(echo ${LINE} | ${CUTBINARY} -d: -f1)
            DIR=$(echo ${LINE} | ${CUTBINARY} -d: -f6)
            LogText "Test: checking directory '${DIR}' for user '${USER}'"
            if [ -d "${DIR}" ]; then
                WRITE_GROUP_PERM=$(${LSBINARY} -ld ${DIR} | ${CUTBINARY} -f1 -d" " | ${CUTBINARY} -c6)
                OTHER_PERMS=$(${LSBINARY} -ld ${DIR} | ${CUTBINARY} -f1 -d" " | ${CUTBINARY} -c8-10)
                if [ ! ${WRITE_GROUP_PERM} = "-" -o ! ${OTHER_PERMS} = "---" ]; then
                    LogText "Result: permissions of home directory ${DIR} of user ${USER} are not strict enough. Should be 750 or more restrictive. Change with: chmod 750 ${DIR}"
                    FOUND=1
                else
                    LogText "Result: permissions of home directory ${DIR} of user ${USER} are fine"
                fi
            fi
        done << EOF
${USERDATA}
EOF

if [ ${FOUND} -eq 1 ]; then
            Display --indent 2 --text "- Permissions of home directories" --result "${STATUS_WARNING}" --color RED
            ReportSuggestion "${TEST_NO}" "Double check the permissions of home directories as some might be not strict enough."
        else
            Display --indent 2 --text "- Permissions of home directories" --result "${STATUS_OK}" --color GREEN
            LogText "Result: OK, all permissions of the home directories are 750 or more restrictive"
        fi
    fi
#
#################################################################################
#
    # Test        : HOME-9306
    # Description : Check if users own their home directories
    Register --test-no HOME-9306 --weight L --network NO --category security --description "Check if users own their home directories"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Check if users own their home directories
        FOUND=0
        USERDATA=$(${GREPBINARY} -E -v '^(daemon|git|halt|root|shutdown|sync)' ${ROOTDIR}etc/passwd | ${AWKBINARY} -F: '($7 !~ "/(false|nologin)$") { print }')
        while read -r LINE; do
            USER=$(echo ${LINE} | ${CUTBINARY} -d: -f1)
            DIR=$(echo ${LINE} | ${CUTBINARY} -d: -f6)
            LogText "Test: checking directory '${DIR}' for user '${USER}'"
            if [ -d "${DIR}" ]; then
                OWNER=$(ls -ld ${DIR} | awk -F" " '{ print $3 }')
                if [ ! "${OWNER}" = "${USER}" ]; then
                    LogText "Result: the home directory ${DIR} of user ${USER} is owned by ${OWNER}. Correct: chown ${USER} ${DIR}" 
                    FOUND=1
                else
                    LogText "Result: ownership of home directory ${DIR} for user ${USER} looks to be correct"
                fi
            fi
        done << EOF
${USERDATA}
EOF

if [ ${FOUND} -eq 1 ]; then
            Display --indent 2 --text "- Ownership of home directories" --result "${STATUS_WARNING}" --color RED
            ReportSuggestion "${TEST_NO}" "Double check the ownership of home directories as some might be incorrect."
        else
            Display --indent 2 --text "- Ownership of home directories" --result "${STATUS_OK}" --color GREEN
            LogText "Result: OK, all users own their home directories"
        fi
    fi
#
#################################################################################
#
    # Test        : HOME-9310
    # Description : Check for suspicious shell history files
    Register --test-no HOME-9310 --weight L --network NO --category security --description "Checking for suspicious shell history files"
    if [ ${SKIPTEST} -eq 0 ]; then
        if [ -n "${HOMEDIRS}" ]; then
            if [ "${OS}" = "Solaris" ]; then
                # Solaris doesn't support -maxdepth
                FIND=$(${FINDBINARY} ${HOMEDIRS} -name ".*history" ! -type f -print)
            else
                FIND=$(${FINDBINARY} ${HOMEDIRS} -maxdepth 1 -name ".*history" ! -type f -print)
            fi
            if [ -z "${FIND}" ]; then
                Display --indent 2 --text "- Checking shell history files" --result "${STATUS_OK}" --color GREEN
                LogText "Result: Ok, history files are type 'file'."
            else
                Display --indent 2 --text "- Checking shell history files" --result "${STATUS_WARNING}" --color RED
                LogText "Result: the following files seem to be of the wrong file type:"
                LogText "Output: ${FIND}"
                LogText "Info: above files could be redirected files to avoid logging and should be investigated"
                ReportWarning "${TEST_NO}" "Incorrect file type found for shell history file"
            fi
            LogText "Remark: History files are normally of the type 'file'. Symbolic links and other types are suspicious."
        else
            Display --indent 2 --text "- Checking shell history files" --result "${STATUS_SKIPPED}" --color WHITE
            LogText "Result: Homedirs is empty, therefore test will be skipped"
        fi
    fi
#
#################################################################################
#
    # Test        : HOME-9314
    # Description : Check if non local paths are found in PATH, which can be a risk, but also bad for performance
    #               (like searching on a filer, instead of local disk)
    #Register --test-no HOME-9314 --weight L --network NO --category security --description "Create list with home directories"
#
#################################################################################
#
    # Test        : HOME-9350
    # Description : Scan home directories for specific files, used in different tests later
    # Notes       : For performance reasons we combine the scanning of different files, so inode caching is used
    #               as much as possible for every find command
    # Profile opt : ignore-home-dir (multiple lines allowed), ignores home directory
    if [ -n "${REPORTFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no HOME-9350 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Collecting information from home directories"
    if [ ${SKIPTEST} -eq 0 ]; then
        IGNORE_HOME_DIRS=$(${GREPBINARY} "^ignore-home-dir=" ${REPORTFILE} | ${AWKBINARY} -F= '{ print $2 }')
        if [ -z "${IGNORE_HOME_DIRS}" ]; then
            LogText "Result: IGNORE_HOME_DIRS empty, no paths excluded"
        else
            LogText "Output: ${IGNORE_HOME_DIRS}"
        fi
    fi
#
#################################################################################
#

WaitForKeyPress

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

cmd: