lynis/include/tests_storage

#!/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.
#
#################################################################################
#
    InsertSection "Storage"
#
#################################################################################
#
    AUTOMOUNTER_DAEMON_RUNNING=0
    NFS_DAEMON_RUNNING=0
    AUTOMOUNTER_DAEMON_TOOL=""
#
#################################################################################
#
    # Test        : STRG-1840
    # Description : Check for disabled USB storage
    Register --test-no STRG-1840 --os Linux --weight L --network NO --category security --description "Check if USB storage is disabled"
    if [ ${SKIPTEST} -eq 0 ]; then
        FOUND=0
        LogText "Test: Checking USB storage driver in directory /etc/modprobe.d and configuration file /etc/modprobe.conf"
        if [ -d /etc/modprobe.d ]; then
            FIND=$(${LSBINARY} ${ROOTDIR}etc/modprobe.d/* 2> /dev/null)
            if [ ! -z "${FIND}" ]; then
                FIND=$(${EGREPBINARY} -r "install usb[-_]storage /bin/(false|true)" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
                FIND2=$(${EGREPBINARY} -r "^blacklist usb[-_]storage" ${ROOTDIR}etc/modprobe.d/*)
                if [ ! -z "${FIND}" -o ! -z "${FIND2}" ]; then
                    FOUND=1
                    LogText "Result: found usb-storage driver in disabled state (blacklisted)"
                fi
            else
                LogText "Result: uncommon situation. Found /etc/modprobe.d directory, but no files in it."
            fi
        fi
        if [ -f ${ROOTDIR}etc/modprobe.conf ]; then
            FIND=$(${EGREPBINARY} "install usb[-_]storage /bin/(false|true)" ${ROOTDIR}etc/modprobe.conf | ${GREPBINARY} "usb-storage" | ${GREPBINARY} -v "#")
            if [ ! -z "${FIND}" ]; then
                FOUND=1
                LogText "Result: found usb-storage driver in disabled state"
            fi
        fi
        if [ ${FOUND} -eq 0 ]; then
            LogText "Result: usb-storage driver is not explicitly disabled"
            Display --indent 2 --text "- Checking usb-storage driver (modprobe config)" --result "NOT DISABLED" --color WHITE
            ReportSuggestion ${TEST_NO} "Disable drivers like USB storage when not used, to prevent unauthorized storage or data theft"
            AddHP 2 3
        else
            LogText "Result: usb-storage driver is disabled"
            Display --indent 2 --text "- Checking usb-storage driver (modprobe config)" --result "${STATUS_DISABLED}" --color GREEN
            AddHP 3 3
        fi
    fi
#
#################################################################################
#
    # Test        : STRG-1842
    # Description : Check USB authorizations
    Register --test-no STRG-1842 --os Linux --weight L --network NO --category security --description "Check USB authorizations"
    if [ ${SKIPTEST} -eq 0 ]; then
        LogText "Test: Checking USB devices authorization to connect to the system"
        FOUND=0
        USBDEVICESPATH="/sys/bus/usb/devices/usb"
        for device in "${USBDEVICESPATH}"*; do
            if [ -e "${device}/authorized" ] || [ -e "${device}/authorized_default" ]; then
                if [ $(cat "${device}/authorized_default") -eq 1 ]; then
                    FOUND=1
                    LogText "Test: ${device} is authorized by default"
                    Report "usb_authorized_default_device[]=${device}"
                elif [ $(cat "${device}/authorized") -eq 1 ]; then
                    FOUND=1
                    LogText "Test: ${device} is authorized currently"
                    Report "usb_authorized_device[]=${device}"
                fi
            fi
        done

        if [ ${FOUND} -eq 1 ]; then
            LogText "Result: Some USB devices are authorized by default (or temporary) to connect to the system"
            Display --indent 2 --text "- Checking USB devices authorization" --result "${STATUS_ENABLED}" --color YELLOW
            # To-Be-Added: create documentation and enable the suggestion
            #ReportSuggestion ${TEST_NO} "Disable USB devices authorization, to prevent unauthorized storage or data theft"
            AddHP 0 3
        else
            LogText "Result: None USB devices are authorized by default (or temporary) to connect to the system"
            Display --indent 2 --text "- Checking USB devices authorization" --result "${STATUS_DISABLED}" --color GREEN
            AddHP 3 3
        fi
    fi
#
#################################################################################
#
    # Test        : STRG-1846
    # Description : Check for disabled firewire storage
    # Explanation : Best option is to use the install function, or else drivers can still be loaded manually
    Register --test-no STRG-1846 --os Linux --weight L --network NO --category security --description "Check if firewire storage is disabled"
    if [ ${SKIPTEST} -eq 0 ]; then
        FOUND=0
        LogText "Test: Checking firewire storage driver in directory /etc/modprobe.d and configuration file /etc/modprobe.conf"
        if [ -d ${ROOTDIR}etc/modprobe.d ]; then
            FIND=$(${LSBINARY} ${ROOTDIR}etc/modprobe.d/* 2> /dev/null)
            if [ ! -z "${FIND}" ]; then
                FIND1=$(${EGREPBINARY} "blacklist (ohci1394|firewire[-_]ohci|firewire-core)" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
                FIND2=$(${EGREPBINARY} "install (ohci1394|firewire[-_]ohci|firewire-core) /bin/(false|true)" ${ROOTDIR}etc/modprobe.d/* | ${GREPBINARY} -v "#")
                if [ ! -z "${FIND1}" -o ! -z "${FIND2}" ]; then
                    FOUND=1
                    LogText "Result: found firewire ohci driver in disabled state"
                fi
            else
                LogText "Result: skipping ${ROOTDIR}etc/modprobe.d, directory found but no files in it"
            fi
        fi
        if [ -f ${ROOTDIR}etc/modprobe.conf ]; then
            FIND1=$(${EGREPBINARY} -r "blacklist (ohci1394|firewire[-_]ohci|firewire-core)" ${ROOTDIR}etc/modprobe.conf | ${GREPBINARY} -v "#")
            FIND2=$(${EGREPBINARY} -r "install (ohci1394|firewire[-_]ohci|firewire-core) /bin/(false|true)" ${ROOTDIR}etc/modprobe.conf | ${GREPBINARY} -v "#")
            if [ ! -z "${FIND1}" -o ! -z "${FIND2}" ]; then
                FOUND=1
                LogText "Result: found firewire ohci driver in disabled state"
            fi
        fi

        if [ ${FOUND} -eq 0 ]; then
            LogText "Result: firewire ohci driver is not explicitly disabled"
            Display --indent 2 --text "- Checking firewire ohci driver (modprobe config)" --result "NOT DISABLED" --color WHITE
            ReportSuggestion ${TEST_NO} "Disable drivers like firewire storage when not used, to prevent unauthorized storage or data theft"
            # after blacklisting modules, make sure to remove them from the initram filesystem: update-initramfs -u
            AddHP 2 3
        else
            LogText "Result: firewire ohci driver is disabled"
            Display --indent 2 --text "- Checking firewire ohci driver (modprobe config)" --result "${STATUS_DISABLED}" --color GREEN
            AddHP 3 3
        fi
    fi
#
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#

WaitForKeyPress

#
#================================================================================
# Lynis - Copyright 2007-2017, CISOfy, Michael Boelen - https://cisofy.com