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/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_shells (13643B)

#!/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.
#
#################################################################################
#
# Shells
#
#################################################################################
#
    IDLE_TIMEOUT=0
    InsertSection "${SECTION_SHELLS}"
#
#################################################################################
#
    # bash
    # Files (interactive login shells):     /etc/profile $HOME/.bash_profile
    #                                       $HOME/.bash_login $HOME/.profile
    # Files (interactive non-login shells): $HOME/.bash_rc
    #
    # csh/tcsh
    # Files: /etc/csh.cshrc /etc/csh.login
    #
    # zsh
    # Files: /etc/zshenv /etc/zsh/zshenv $HOME/.zshenv /etc/zprofile
    #        /etc/zsh/zprofile $HOME/.zprofile /etc/zshrc /etc/zsh/zshrc
    #        $ZDOTDIR/.zshrc /etc/zlogin /etc/zsh/zlogin

SHELL_LOGIN_FILES="${ROOTDIR}etc/csh.cshrc ${ROOTDIR}etc/csh.login ${ROOTDIR}etc/zshenv ${ROOTDIR}etc/zsh/zshenv
                       ${ROOTDIR}etc/zprofile ${ROOTDIR}etc/zsh/zprofile ${ROOTDIR}etc/zshrc ${ROOTDIR}etc/zsh/zshrc
                       ${ROOTDIR}etc/zlogin ${ROOTDIR}etc/zsh/zlogin"
#
#################################################################################
#

# Test        : SHLL-6202
    # Description : check all console TTYs in which root user can enter single user mode without password
    Register --test-no SHLL-6202 --os FreeBSD --weight L --network NO --category security --description "Check console TTYs"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking console TTYs"
        FIND=$(${GREPBINARY} -E '^console' ${ROOTDIR}etc/ttys | ${GREPBINARY} -v 'insecure')
        if [ -z "${FIND}" ]; then
            Display --indent 2 --text "- Checking console TTYs" --result "${STATUS_OK}" --color GREEN
            LogText "Result: console is secured against single user mode without password."
        else
            Display --indent 2 --text "- Checking console TTYs" --result "${STATUS_WARNING}" --color RED
            LogText "Result: Found insecure console in ${ROOTDIR}etc/ttys. Single user mode login without password allowed!"
            LogText "Output ${ROOTDIR}etc/ttys:"
            LogText "${FIND}"
            ReportWarning "${TEST_NO}" "Found unprotected console in ${ROOTDIR}etc/ttys"
            LogText "Possible solution: Change the console line from 'secure' to 'insecure'."
        fi
    fi
#
#################################################################################
#
    # Test        : SHLL-6211
    # Description : Determine available shell according /etc/shells
    Register --test-no SHLL-6211 --weight L --network NO --category security --description "Available and valid shells"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Searching for ${ROOTDIR}etc/shells"
        if [ -f ${ROOTDIR}etc/shells ]; then
            LogText "Result: Found ${ROOTDIR}etc/shells file"
            LogText "Test: Reading available shells from ${ROOTDIR}etc/shells"
            SSHELLS=$(${GREPBINARY} "^/" ${ROOTDIR}etc/shells)
            CSSHELLS=0; CSSHELLS_ALL=0
            Display --indent 2 --text "- Checking shells from ${ROOTDIR}etc/shells"
            for I in ${SSHELLS}; do
                CSSHELLS_ALL=$((CSSHELLS_ALL + 1))
                Report "available_shell[]=${I}"
                # TODO add check for symlinked shells
                if [ -f ${I} ]; then
                    LogText "Found installed shell: ${I}"
                    CSSHELLS=$((CSSHELLS + 1))
                else
                    LogText "Shell ${I} not installed. Probably a dummy or non existing shell."
                fi
            done
            Display --indent 4 --text "Result: found ${CSSHELLS_ALL} shells (valid shells: ${CSSHELLS})."
        else
            LogText "Result: ${ROOTDIR}etc/shells not found, skipping test"
        fi
    fi
#
#################################################################################
#
    # Test        : SHLL-6220
    # Description : Check for idle session killing tools or settings
    Register --test-no SHLL-6220 --weight L --network NO --category security --description "Idle session killing tools or settings"
    if [ ${SKIPTEST} -eq 0 ]; then

IDLE_TIMEOUT_METHOD=""
        IDLE_TIMEOUT_READONLY=""

LogText "Test: Search for session timeout tools or settings in shell"
        if IsRunning "timeoutd"; then
            IDLE_TIMEOUT=1
            LogText "Result: found timeoutd process to kill idle sessions"
            IDLE_TIMEOUT_METHOD="timeout-daemon"
        fi
        if IsRunning "autolog"; then
            IDLE_TIMEOUT=1
            LogText "Result: found autolog process to kill idle sessions"
            Report "session_timeout_method[]=autolog"
            IDLE_TIMEOUT_METHOD="autolog"
        fi

if [ -f ${ROOTDIR}etc/profile ]; then
            # Determine if we can find a TMOUT value
            FIND=$(${GREPBINARY} 'TMOUT=' ${ROOTDIR}etc/profile | ${TRBINARY} -d ' ' | ${TRBINARY} -d '\t' | ${GREPBINARY} -v "^#" | ${SEDBINARY} 's/export//' | ${SEDBINARY} 's/#.*//' | ${AWKBINARY} -F= '{ print $2 }')
            # Determine if the value is exported (with export, readonly, or typeset)
            FIND2=$(${GREPBINARY} '$export\|readonly\|typeset -r$[ \t]*TMOUT' ${ROOTDIR}etc/profile | ${GREPBINARY} -v "^#" | ${SEDBINARY} 's/#.*//' | ${AWKBINARY} '{ print $1 }')
            if [ -n "${FIND}" ]; then
                N=0; IDLE_TIMEOUT=1
                for I in ${FIND}; do
                    LogText "Output: ${I}"
                    Report "session_timeout_value[]=${I}"
                    N=$((N + 1))
                done
                if [ ${N} -eq 1 ]; then
                    LogText "Result: found TMOUT value configured in ${ROOTDIR}etc/profile"
                else
                    LogText "Result: found several TMOUT values configured in ${ROOTDIR}etc/profile"
                fi
                IDLE_TIMEOUT_METHOD="profile"
            else
                LogText "Result: could not find TMOUT setting in ${ROOTDIR}etc/profile"
            fi

if [ -n "${FIND2}" ]; then
                N=0;
                for I in ${FIND2}; do
                    LogText "Output: ${I}"
                    if [ "${I}" = "readonly" -o "${I}" = "typeset" ]; then
                        N=$((N + 1))
                    fi
                done
                if [ ${N} -gt 0 ]; then
                    LogText "Result: found readonly setting in ${ROOTDIR}etc/profile (readonly or typeset -r)"
                    IDLE_TIMEOUT_READONLY=1
                else
                    LogText "Result: NO readonly setting found in ${ROOTDIR}etc/profile (readonly or typeset -r)"
                    IDLE_TIMEOUT_READONLY=0
                fi
            else
                LogText "Result: could not find export, readonly or typeset -r in ${ROOTDIR}etc/profile"
            fi
        else
            LogText "Result: skip ${ROOTDIR}etc/profile test, file not available on this system"
        fi

if [ -d ${ROOTDIR}etc/profile.d ]; then
            FIND=$(${LSBINARY} ${ROOTDIR}etc/profile.d/*.sh 2> /dev/null)
            if [ -n "${FIND}" ]; then
                # Determine if we can find a TMOUT value
                FIND=$(${FINDBINARY} -L ${ROOTDIR}etc/profile.d -name "*.sh" -type f -exec cat {} \; 2> /dev/null | ${GREPBINARY} 'TMOUT=' | ${TRBINARY} -d ' ' | ${TRBINARY} -d '\t' | ${GREPBINARY} -v "^#" | ${SEDBINARY} 's/export//' | ${SEDBINARY} 's/#.*//' | ${AWKBINARY} -F= '{ print $2 }')
                # Determine if the value is exported (with export, readonly, or typeset)
                FIND2=$(${FINDBINARY} -L ${ROOTDIR}etc/profile.d -name "*.sh" -type f -exec cat {} \; 2> /dev/null | ${GREPBINARY} '$export\|readonly\|typeset -r$[ \t]*TMOUT' | ${GREPBINARY} -v "^#" | ${SEDBINARY} 's/#.*//' | ${AWKBINARY} '{ print $1 }')
                if [ -n "${FIND}" ]; then
                    N=0; IDLE_TIMEOUT=1
                    for I in ${FIND}; do
                        LogText "Output: ${I}"
                        Report "session_timeout_value[]=${I}"
                        N=$((N + 1))
                    done
                    if [ ${N} -eq 1 ]; then
                        LogText "Result: found TMOUT value configured in one of the files in ${ROOTDIR}etc/profile.d directory"
                    else
                        LogText "Result: found several TMOUT values configured in one of the files in ${ROOTDIR}etc/profile.d directory"
                    fi
                    IDLE_TIMEOUT_METHOD="profile.d"
                else
                    LogText "Result: could not find TMOUT setting in ${ROOTDIR}etc/profile.d/*.sh"
                fi
                # Check for readonly
                if [ -n "${FIND2}" ]; then
                    N=0;
                    for I in ${FIND2}; do
                        LogText "Output: ${I}"
                        if [ "${I}" = "readonly" -o "${I}" = "typeset" ]; then
                            N=$((N + 1))
                        fi
                    done
                    if [ ${N} -gt 0 ]; then
                        LogText "Result: found readonly setting in ${ROOTDIR}etc/profile (readonly or typeset -r)"
                        IDLE_TIMEOUT_READONLY=1
                    else
                        LogText "Result: NO readonly setting found in ${ROOTDIR}etc/profile (readonly or typeset -r)"
                        IDLE_TIMEOUT_READONLY=0
                    fi
                else
                    LogText "Result: could not find export, readonly or typeset -r in ${ROOTDIR}etc/profile"
                fi
            fi
        else
            LogText "Result: skip ${ROOTDIR}etc/profile.d directory test, directory not available on this system"
        fi

if [ -n "${IDLE_TIMEOUT_METHOD}" ]; then
            Report "session_timeout_method[]=${IDLE_TIMEOUT_METHOD}"
        fi
        if [ -n "${IDLE_TIMEOUT_READONLY}" ]; then
            Report "session_timeout_set_readonly=${IDLE_TIMEOUT_READONLY}"
        fi

if [ ${IDLE_TIMEOUT} -eq 1 ]; then
            Display --indent 4 --text "- Session timeout settings/tools" --result "${STATUS_FOUND}" --color GREEN
            AddHP 3 3
        else
            Display --indent 4 --text "- Session timeout settings/tools" --result "${STATUS_NONE}" --color YELLOW
            AddHP 1 3
        fi
    fi
#
#################################################################################
#
    # Test        : SHLL-6230
    # Description : Check for umask values in shell configurations
    SHELL_CONFIG_FILES="${ROOTDIR}etc/bashrc ${ROOTDIR}etc/bash.bashrc ${ROOTDIR}etc/bash.bashrc.local ${ROOTDIR}etc/csh.cshrc ${ROOTDIR}etc/profile"
    Register --test-no SHLL-6230 --weight H --network NO --category security --description "Perform umask check for shell configurations"
    if [ ${SKIPTEST} -eq 0 ]; then
        FOUND=0
        Display --indent 2 --text "- Checking default umask values"
        for FILE in ${SHELL_CONFIG_FILES}; do
            HARDENING_POSSIBLE=0
            FIND=""
            if [ -f ${FILE} ]; then
                LogText "Result: file ${FILE} exists"
                FOUND=1
                FIND=$(${GREPBINARY} umask ${FILE} | ${SEDBINARY} 's/^[ \t]*//g' | ${SEDBINARY} 's/#.*$//' | ${GREPBINARY} -v "^$" | ${AWKBINARY} '{ print $2 }')
                if IsEmpty "${FIND}"; then
                    LogText "Result: did not find umask configured in ${FILE}"
                    Display --indent 4 --text "- Checking default umask in ${FILE}" --result "${STATUS_NONE}" --color YELLOW
                else
                    for UMASKVALUE in ${FIND}; do
                        LogText "Result: found umask ${UMASKVALUE} in ${FILE}"
                        case ${UMASKVALUE} in
                            027|0027|077|0077)
                                    LogText "Result: umask ${UMASKVALUE} is considered a properly hardened value"
                            ;;
                            *)
                                    LogText "Result: umask ${UMASKVALUE} can be hardened "
                                    HARDENING_POSSIBLE=1
                            ;;
                        esac
                    done
                    if [ ${HARDENING_POSSIBLE} -eq 0 ]; then
                        Display --indent 4 --text "- Checking default umask in ${FILE}" --result "${STATUS_OK}" --color GREEN
                        AddHP 3 3
                    else
                        Display --indent 4 --text "- Checking default umask in ${FILE}" --result "${STATUS_WEAK}" --color YELLOW
                        AddHP 1 3
                    fi
                fi
            else
                LogText "Result: file ${FILE} not found"
            fi
        done
    fi
#
#################################################################################
#

Report "session_timeout_enabled=${IDLE_TIMEOUT}"

#
#################################################################################
#

WaitForKeyPress

# EOF

cmd: