mirror of https://github.com/CISOfy/lynis.git
643 lines
35 KiB
Bash
643 lines
35 KiB
Bash
#!/bin/sh
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#################################################################################
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#
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# Lynis
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# ------------------
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#
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# Copyright 2007-2013, Michael Boelen
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# Copyright 2007-2018, CISOfy
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#
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# Website : https://cisofy.com
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# Blog : http://linux-audit.com
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# GitHub : https://github.com/CISOfy/lynis
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#
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# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
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# welcome to redistribute it under the terms of the GNU General Public License.
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# See LICENSE file for usage of this software.
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#
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#################################################################################
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#
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# Kernel
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#
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#################################################################################
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#
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InsertSection "Kernel"
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#
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#################################################################################
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#
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CORE_DUMPS_DISABLED=0
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CPU_PAE=0
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CPU_NX=0
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LINUXCONFIGFILE=""
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LINUXCONFIGFILE_ZIPPED=0
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#
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#################################################################################
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#
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# Test : KRNL-5622
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# Description : Check default run level on Linux machines
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Register --test-no KRNL-5622 --os Linux --weight L --network NO --category security --description "Determine Linux default run level"
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if [ ${SKIPTEST} -eq 0 ]; then
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# Checking if we can find the systemd default target
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LogText "Test: Checking for systemd default.target"
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if [ -L ${ROOTDIR}etc/systemd/system/default.target ]; then
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LogText "Result: symlink found"
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if HasData "${READLINKBINARY}"; then
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FIND=$(${READLINKBINARY} ${ROOTDIR}etc/systemd/system/default.target)
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if ! HasData "${FIND}"; then
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LogText "Exception: can't find the target of the symlink of /etc/systemd/system/default.target"
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ReportException "${TEST_NO}:01"
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else
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FIND2=$(echo ${FIND} | ${EGREPBINARY} "runlevel5|graphical")
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if HasData "${FIND2}"; then
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LogText "Result: Found match on runlevel5/graphical"
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Display --indent 2 --text "- Checking default runlevel" --result "runlevel 5" --color GREEN
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Report "linux_default_runlevel=5"
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else
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LogText "Result: No match found on runlevel, defaulting to runlevel 3"
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Display --indent 2 --text "- Checking default runlevel" --result "runlevel 3" --color GREEN
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Report "linux_default_runlevel=3"
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fi
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fi
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else
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LogText "Result: No readlink binary, can't determine where symlink is pointing to"
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Display --indent 2 --text "- Checking default run level" --result "${STATUS_UNKNOWN}" --color YELLOW
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fi
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else
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LogText "Result: no systemd found, so trying inittab"
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LogText "Test: Checking ${ROOTDIR}etc/inittab"
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if [ -f ${ROOTDIR}etc/inittab ]; then
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LogText "Result: file ${ROOTDIR}etc/inittab found"
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LogText "Test: Checking default Linux run level"
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FIND=$(${AWKBINARY} -F: '/^id/ { print $2; }' ${ROOTDIR}etc/inittab | head -n 1)
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if IsEmpty "${FIND}"; then
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Display --indent 2 --text "- Checking default runlevel" --result "${STATUS_UNKNOWN}" --color YELLOW
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LogText "Result: Can't determine default run level from ${ROOTDIR}etc/inittab"
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else
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Display --indent 2 --text "- Checking default run level" --result "${FIND}" --color GREEN
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LogText "Found default run level '${FIND}'"
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Report "linux_default_runlevel=${FIND}"
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fi
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else
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LogText "Result: file ${ROOTDIR}etc/inittab not found"
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if [ "${LINUX_VERSION}" = "Debian" -o "${LINUX_VERSION}" = "Ubuntu" ]; then
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LogText "Test: Checking run level with who -r, for Debian based systems"
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FIND=$(who -r | ${AWKBINARY} '{ if ($1=="run-level") { print $2 } }')
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if HasData "${FIND}"; then
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LogText "Result: Found default run level '${FIND}'"
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Report "linux_default_runlevel=${FIND}"
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Display --indent 2 --text "- Checking default run level" --result "RUNLEVEL ${FIND}" --color GREEN
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else
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LogText "Result: Can't determine default run level from who -r"
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Display --indent 2 --text "- Checking default run level" --result "${STATUS_UNKNOWN}" --color YELLOW
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fi
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fi
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fi
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5677
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# Description : Check CPU options and support (PAE, No eXecute, eXecute Disable)
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# More info : pae and nx bit are both visible on AMD and Intel CPU's if supported
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if [ "${HARDWARE}" = "x86_64" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no KRNL-5677 --preqs-met "${PREQS_MET}" --os Linux --weight L --network NO --category security --description "Check CPU options and support"
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if [ ${SKIPTEST} -eq 0 ]; then
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Display --indent 2 --text "- Checking CPU support (NX/PAE)"
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LogText "Test: Checking /proc/cpuinfo"
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if [ -f /proc/cpuinfo ]; then
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LogText "Result: found /proc/cpuinfo"
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LogText "Test: Checking CPU options (XD/NX/PAE)"
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FIND_PAE_NX=$(${GREPBINARY} " pae " /proc/cpuinfo | ${GREPBINARY} " nx ")
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FIND_PAE=$(${GREPBINARY} " pae " /proc/cpuinfo)
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FIND_NX=$(${GREPBINARY} " nx " /proc/cpuinfo)
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FOUND=0
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if HasData "${FIND_PAE_NX}"; then
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LogText "PAE: Yes"
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LogText "NX: Yes"
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CPU_PAE=1
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CPU_NX=1
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LogText "Result: PAE or No eXecute option(s) both found"
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Report "cpu_pae=1"
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Report "cpu_nx=1"
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FOUND=1
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else
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if HasData "${FIND_PAE}" && IsEmpty "${FIND_NX}"; then
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Report "cpu_pae=1"
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LogText "Result: found PAE"
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CPU_PAE=1
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FOUND=1
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else
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if HasData "${FIND_NX}" && IsEmpty "${FIND_PAE}"; then
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Report "cpu_nx=1"
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LogText "Result: found No eXecute"
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CPU_NX=1
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FOUND=1
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else
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LogText "Result: found no CPU options enabled (PAE or NX bit)"
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fi
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fi
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fi
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if [ ${FOUND} -eq 1 ]; then
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Display --indent 4 --text "CPU support: PAE and/or NoeXecute supported" --result "${STATUS_FOUND}" --color GREEN
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else
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Display --indent 4 --text "CPU support: No PAE or NoeXecute supported" --result "${STATUS_NONE}" --color YELLOW
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ReportSuggestion ${TEST_NO} "Use a PAE enabled kernel when possible to gain native No eXecute/eXecute Disable support"
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fi
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else
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Display --indent 4 --text "CPU support: no /proc/cpuinfo" --result "${STATUS_SKIPPED}" --color YELLOW
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LogText "Result: /proc/cpuinfo not found"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5680
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# Description : Check if installed kernel has PAE support
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# Dependency : KRNL-5677
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# More info : RedHat/CentOS/Fedora uses the package name 'kernel-PAE'
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#
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#################################################################################
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#
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# Test : KRNL-5695
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# Description : Determining Linux kernel version and release number
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Register --test-no KRNL-5695 --os Linux --weight L --network NO --category security --description "Determine Linux kernel version and release number"
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if [ ${SKIPTEST} -eq 0 ]; then
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# Kernel number (and suffix)
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LINUX_KERNEL_RELEASE=$(uname -r)
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Report "linux_kernel_release=${LINUX_KERNEL_RELEASE}"
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LogText "Result: found kernel release ${LINUX_KERNEL_RELEASE}"
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# Type and build date
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LINUX_KERNEL_VERSION=$(uname -v)
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Report "linux_kernel_version=${LINUX_KERNEL_VERSION}"
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LogText "Result: found kernel version ${LINUX_KERNEL_VERSION}"
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Display --indent 2 --text "- Checking kernel version and release" --result "${STATUS_DONE}" --color GREEN
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5723
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# Description : Check if Linux is build as a monolithic kernel or not
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Register --test-no KRNL-5723 --os Linux --weight L --network NO --category security --description "Determining if Linux kernel is monolithic"
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if [ ${SKIPTEST} -eq 0 ]; then
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if [ ! -z "${LSMODBINARY}" -a -f /proc/modules ]; then
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LogText "Test: checking if kernel is monolithic or modular"
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# Checking if any modules are loaded
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FIND=$(${LSMODBINARY} | ${GREPBINARY} -v "^Module" | wc -l | ${TRBINARY} -s ' ' | ${TRBINARY} -d ' ')
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Display --indent 2 --text "- Checking kernel type" --result "${STATUS_DONE}" --color GREEN
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if [ "${FIND}" = "0" ]; then
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LogText "Result: Found monolithic kernel"
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Report "linux_kernel_type=monolithic"
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MONOLITHIC_KERNEL=1
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else
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LogText "Result: Found modular kernel"
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Report "linux_kernel_type=modular"
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MONOLITHIC_KERNEL=0
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fi
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else
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LogText "Test skipped, lsmod binary not found or /proc/modules can not be opened"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5726
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# Description : Checking Linux loaded kernel modules
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Register --test-no KRNL-5726 --os Linux --weight L --network NO --category security --description "Checking Linux loaded kernel modules"
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if [ ${SKIPTEST} -eq 0 ]; then
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if [ ! -z "${LSMODBINARY}" -a -f /proc/modules ]; then
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FIND=$(${LSMODBINARY} | ${AWKBINARY} '{ if ($1!="Module") print $1 }' | sort)
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Display --indent 2 --text "- Checking loaded kernel modules" --result "${STATUS_DONE}" --color GREEN
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if HasData "${FIND}"; then
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LogText "Loaded modules according lsmod:"
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COUNT=0
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for ITEM in ${FIND}; do
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LogText "Loaded module: ${ITEM}"
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Report "loaded_kernel_module[]=${ITEM}"
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COUNT=$((COUNT + 1))
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done
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Display --indent 6 --text "Found ${COUNT} active modules"
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else
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LogText "Result: no loaded modules found"
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LogText "Notice: No loaded kernel modules could indicate a broken/malformed lsmod, or a (custom) monolithic kernel"
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fi
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else
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LogText "Test skipped, lsmod binary not found or /proc/modules can not be opened"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5728
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# Description : Checking for available Linux kernel configuration file in /boot
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Register --test-no KRNL-5728 --os Linux --weight L --network NO --category security --description "Checking Linux kernel config"
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if [ ${SKIPTEST} -eq 0 ]; then
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CHECKFILE="/boot/config-$(uname -r)"
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if [ -f ${CHECKFILE} ]; then
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LINUXCONFIGFILE="${CHECKFILE}"
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LogText "Result: found config (${LINUXCONFIGFILE})"
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Display --indent 2 --text "- Checking Linux kernel configuration file" --result "${STATUS_FOUND}" --color GREEN
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elif [ -f /proc/config.gz ]; then
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LINUXCONFIGFILE="${CHECKFILE}"
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LINUXCONFIGFILE_ZIPPED=1
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LogText "Result: found config: /proc/config.gz (compressed)"
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Display --indent 2 --text "- Checking Linux kernel configuration file" --result "${STATUS_FOUND}" --color GREEN
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else
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LogText "Result: no Linux kernel configuration file found in /boot"
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Display --indent 2 --text "- Checking Linux kernel configuration file" --result "${STATUS_NOT_FOUND}" --color WHITE
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fi
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if HasData "${LINUXCONFIGFILE}"; then
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Report "linux_config_file=${LINUXCONFIGFILE}"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5730
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# Description : Checking default I/O kernel scheduler
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# Notes : This test could be extended with testing some of the specific devices like disks
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# cat /sys/block/sda/queue/scheduler
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PREQS_MET="NO"
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if HasData "${LINUXCONFIGFILE}"; then
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if [ -f ${LINUXCONFIGFILE} ]; then PREQS_MET="YES"; fi
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fi
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Register --test-no KRNL-5730 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking disk I/O kernel scheduler"
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if [ ${SKIPTEST} -eq 0 ]; then
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if [ ${LINUXCONFIGFILE_ZIPPED} -eq 1 ]; then GREPTOOL="${ZGREPBINARY}"; else GREPTOOL="${GREPBINARY}"; fi
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if [ ! "${GREPTOOL}" = "" ]; then
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LogText "Test: Checking the default I/O kernel scheduler"
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LINUX_KERNEL_IOSCHED=$(${GREPTOOL} "CONFIG_DEFAULT_IOSCHED" ${LINUXCONFIGFILE} | ${AWKBINARY} -F= '{ print $2 }' | ${SEDBINARY} s/\"//g)
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if [ ! "${LINUX_KERNEL_IOSCHED}" = "" ]; then
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LogText "Result: found IO scheduler '${LINUX_KERNEL_IOSCHED}'"
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Display --indent 2 --text "- Checking default I/O kernel scheduler" --result "${STATUS_FOUND}" --color GREEN
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Report "linux_kernel_io_scheduler[]=${LINUX_KERNEL_IOSCHED}"
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else
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LogText "Result: no default i/o kernel scheduler found"
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Display --indent 2 --text "- Checking default I/O kernel scheduler" --result "${STATUS_NOT_FOUND}" --color WHITE
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fi
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else
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ReportException "${TEST_NO}" "No valid ${GREPBINARY} tool found to search kernel settings"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5745
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# Description : Checking FreeBSD loaded kernel modules
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Register --test-no KRNL-5745 --os FreeBSD --weight L --network NO --category security --description "Checking FreeBSD loaded kernel modules"
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if [ ${SKIPTEST} -eq 0 ]; then
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Display --indent 2 --text "- Checking active kernel modules"
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LogText "Test: Active kernel modules (KLDs)"
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LogText "Description: View all active kernel modules (including kernel)"
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LogText "Test: Checking modules"
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if [ -f /sbin/kldstat ]; then
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FIND=$(kldstat | ${GREPBINARY} -v 'Name' | ${TRBINARY} -s ' ' | ${CUTBINARY} -d ' ' -f6)
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if [ $? -eq 0 ]; then
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LogText "Loaded modules according kldstat:"
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COUNT=0
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for ITEM in ${FIND}; do
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LogText "Loaded module: ${ITEM}"
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Report "loaded_kernel_module[]=${ITEM}"
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COUNT=$((COUNT + 1))
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done
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Display --indent 4 --text "Found ${COUNT} kernel modules" --result "${STATUS_DONE}" --color GREEN
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else
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Display --indent 4 --text "Test failed" --result "${STATUS_WARNING}" --color RED
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LogText "Result: Problem with executing kldstat"
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fi
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else
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LogText "Result: no results, can't find /sbin/kldstat"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5831
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# Description : Checking DragonFly loaded kernel modules
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Register --test-no KRNL-5831 --os DragonFly --weight L --network NO --category security --description "Checking DragonFly loaded kernel modules"
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if [ ${SKIPTEST} -eq 0 ]; then
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Display --indent 2 --text "- Checking active kernel modules"
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LogText "Test: Active kernel modules (KLDs)"
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LogText "Description: View all active kernel modules (including kernel)"
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LogText "Test: Checking modules"
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if [ -f ${ROOTDIR}sbin/kldstat ]; then
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FIND=$(${ROOTDIR}sbin/kldstat | ${GREPBINARY} -v 'Name' | ${TRBINARY} -s ' ' | ${CUTBINARY} -d ' ' -f6)
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if [ $? -eq 0 ]; then
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LogText "Loaded modules according kldstat:"
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COUNT=0
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for ITEM in ${FIND}; do
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LogText "Loaded module: ${ITEM}"
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Report "loaded_kernel_module[]=${ITEM}"
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COUNT=$((COUNT + 1))
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done
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Display --indent 4 --text "Found ${COUNT} kernel modules" --result "${STATUS_DONE}" --color GREEN
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else
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Display --indent 4 --text "Test failed" --result "${STATUS_WARNING}" --color RED
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LogText "Result: Problem with executing kldstat"
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fi
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else
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echo "[ ${WHITE}SKIPPED${NORMAL} ]"
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LogText "Result: no results, can NOT find ${ROOTDIR}sbin/kldstat"
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5770
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# Description : Checking Solaris load modules
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Register --test-no KRNL-5770 --os Solaris --weight L --network NO --category security --description "Checking active kernel modules"
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if [ ${SKIPTEST} -eq 0 ]; then
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LogText "Test: searching loaded kernel modules"
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FIND=$(/usr/sbin/modinfo -c -w | ${GREPBINARY} -v "UNLOADED" | ${GREPBINARY} LOADED | ${AWKBINARY} '{ print $3 }' | sort)
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if HasData "${FIND}"; then
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for ITEM in ${FIND}; do
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LogText "Found module: ${ITEM}"
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Report "loaded_kernel_module[]=${ITEM}"
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done
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Display --indent 2 --text "- Checking Solaris active kernel modules" --result "${STATUS_DONE}" --color GREEN
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else
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LogText "Result: no output"
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Display --indent 2 --text "- Checking Solaris active kernel modules" --result "${STATUS_UNKNOWN}" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# Test : KRNL-5788
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# Description : Checking availability new kernel
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if [ "${LINUX_VERSION}" = "Debian" -o "${LINUX_VERSION}" = "Ubuntu" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no KRNL-5788 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Checking availability new Linux kernel"
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if [ ${SKIPTEST} -eq 0 ]; then
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HAS_VMLINUZ=0
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LogText "Test: Searching apt-cache, to determine if a newer kernel is available"
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if [ -x ${ROOTDIR}usr/bin/apt-cache ]; then
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LogText "Result: found ${ROOTDIR}usr/bin/apt-cache"
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LogText "Test: checking readlink location of ${ROOTDIR}vmlinuz"
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if [ -f ${ROOTDIR}vmlinuz ]; then
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HAS_VMLINUZ=1
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FINDKERNFILE=$(readlink -f ${ROOTDIR}vmlinuz)
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LogText "Output: readlink reported file ${FINDKERNFILE}"
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LogText "Test: checking package from dpkg -S"
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FINDKERNEL=$(dpkg -S ${FINDKERNFILE} 2> /dev/null | ${AWKBINARY} -F : '{print $1}')
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LogText "Output: dpkg -S reported package ${FINDKERNEL}"
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elif [ -e ${ROOTDIR}dev/grsec ]; then
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FINDKERNEL=linux-image-$(uname -r)
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LogText "Result: ${ROOTDIR}vmlinuz missing due to grsecurity; assuming ${FINDKERNEL}"
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else
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LogText "This system is missing ${ROOTDIR}vmlinuz. Unable to check whether kernel is up-to-date."
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ReportSuggestion ${TEST_NO} "Determine why ${ROOTDIR}vmlinuz is missing on this Debian/Ubuntu system." "/vmlinuz"
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fi
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LogText "Test: Using apt-cache policy to determine if there is an update available"
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FINDINST=$(apt-cache policy ${FINDKERNEL} | ${EGREPBINARY} 'Installed' | ${CUTBINARY} -d ':' -f2 | ${TRBINARY} -d ' ')
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FINDCAND=$(apt-cache policy ${FINDKERNEL} | ${EGREPBINARY} 'Candidate' | ${CUTBINARY} -d ':' -f2 | ${TRBINARY} -d ' ')
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LogText "Kernel installed: ${FINDINST}"
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LogText "Kernel candidate: ${FINDCAND}"
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if IsEmpty "${FINDINST}"; then
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Display --indent 2 --text "- Checking for available kernel update" --result "${STATUS_UNKNOWN}" --color YELLOW
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LogText "Result: Exception occurred, no output from apt-cache policy"
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if [ ${HAS_VMLINUZ} -eq 1 ]; then
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ReportException "${TEST_NO}:01"
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ReportSuggestion ${TEST_NO} "Check the output of apt-cache policy to determine why its output is empty"
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fi
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LogText "Result: apt-cache policy did not return an installed kernel version"
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else
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if [ "${FINDINST}" = "${FINDCAND}" ]; then
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if [ -e /dev/grsec ]; then
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Display --indent 2 --text "- Checking for available kernel update" --result GRSEC --color GREEN
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LogText "Result: Grsecurity is installed; unable to determine if there's a newer kernel available"
|
|
ReportManual "Manually check to confirm you're using a recent kernel and grsecurity patch"
|
|
else
|
|
Display --indent 2 --text "- Checking for available kernel update" --result "${STATUS_OK}" --color GREEN
|
|
LogText "Result: no kernel update available"
|
|
fi
|
|
else
|
|
Display --indent 2 --text "- Checking for available kernel update" --result "UPDATE AVAILABLE" --color YELLOW
|
|
LogText "Result: kernel update available according 'apt-cache policy'."
|
|
ReportSuggestion ${TEST_NO} "Determine priority for available kernel update"
|
|
fi
|
|
fi
|
|
else
|
|
LogText "Result: could NOT find /usr/bin/apt-cache, skipped other tests."
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : KRNL-5820
|
|
# Description : Checking core dumps configuration (Linux)
|
|
Register --test-no KRNL-5820 --os Linux --weight L --network NO --category security --description "Checking core dumps configuration"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
LogText "Test: Checking presence /etc/security/limits.conf"
|
|
if [ -f /etc/security/limits.conf ]; then
|
|
LogText "Result: file /etc/security/limits.conf exists"
|
|
LogText "Test: Checking if core dumps are disabled in /etc/security/limits.conf"
|
|
FIND1=$(${GREPBINARY} -v "^#" /etc/security/limits.conf | ${GREPBINARY} -v "^$" | ${AWKBINARY} '{ if ($1=="*" && $2=="soft" && $3=="core" && $4=="1") { print "soft core enabled" } }')
|
|
FIND2=$(${GREPBINARY} -v "^#" /etc/security/limits.conf | ${GREPBINARY} -v "^$" | ${AWKBINARY} '{ if ($1=="*" && $2=="hard" && $3=="core" && $4=="1") { print "hard core enabled" } }')
|
|
if [ "${FIND1}" = "soft core enabled" -o "${FIND2}" = "hard core enabled" ]; then
|
|
LogText "Result: core dumps (soft or hard) are enabled"
|
|
Display --indent 2 --text "- Checking core dumps configuration" --result "${STATUS_ENABLED}" --color YELLOW
|
|
ReportSuggestion "${TEST_NO}" "Check if core dumps need to be enabled on this system"
|
|
AddHP 1 2
|
|
else
|
|
LogText "Result: core dumps (soft and hard) are both disabled"
|
|
Display --indent 2 --text "- Checking core dumps configuration" --result "${STATUS_DISABLED}" --color GREEN
|
|
CORE_DUMPS_DISABLED=1
|
|
AddHP 3 3
|
|
fi
|
|
|
|
# Sysctl option
|
|
LogText "Test: Checking sysctl value of fs.suid_dumpable"
|
|
FIND=$(${SYSCTLBINARY} fs.suid_dumpable 2> /dev/null | ${AWKBINARY} '{ if ($1=="fs.suid_dumpable") { print $3 } }')
|
|
if [ -z "${FIND}" ]; then
|
|
LogText "Result: sysctl key fs.suid_dumpable not found"
|
|
else
|
|
LogText "Result: value ${FIND} found"
|
|
fi
|
|
if [ "${FIND}" = "2" ]; then
|
|
LogText "Result: programs can dump core dump, but only readable by root (value 2, for debugging with file protection)"
|
|
Display --indent 4 --text "- Checking setuid core dumps configuration" --result PROTECTED --color GREEN
|
|
AddHP 1 1
|
|
elif [ "${FIND}" = "1" ]; then
|
|
LogText "Result: all programs can perform core dumps (value 1, for debugging)"
|
|
Display --indent 2 --text "- Checking setuid core dumps configuration" --result DEBUG --color YELLOW
|
|
ReportSuggestion "${TEST_NO}" "Determine if all binaries need to be able to core dump"
|
|
AddHP 0 1
|
|
else
|
|
LogText "Result: found default option, some programs can dump (not processes which need to change credentials)"
|
|
Display --indent 4 --text "- Checking setuid core dumps configuration" --result DEFAULT --color YELLOW
|
|
AddHP 1 1
|
|
fi
|
|
else
|
|
LogText "Result: file /etc/security/limits.conf does not exist, skipping test"
|
|
fi
|
|
# TODO: Check ulimit settings in /etc/profile and /etc/profile.d
|
|
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : KRNL-5826
|
|
# Description : Checking core dumps configuration (Solaris)
|
|
#Register --test-no KRNL-5826 --os Linux --weight L --network NO --category security --description "Checking core dumps configuration"
|
|
#if [ ${SKIPTEST} -eq 0 ]; then
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : KRNL-5830
|
|
# Description : Check if system needs a reboot (Linux only)
|
|
Register --test-no KRNL-5830 --os Linux --weight L --network NO --category security --description "Checking if system is running on the latest installed kernel"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
REBOOT_NEEDED=2
|
|
FILE="${ROOTDIR}var/run/reboot-required.pkgs"
|
|
LogText "Test: Checking presence ${FILE}"
|
|
if [ -f ${FILE} ]; then
|
|
LogText "Result: file ${FILE} exists"
|
|
FIND=$(${WCBINARY} -l < ${FILE})
|
|
if [ "${FIND}" = "0" ]; then
|
|
LogText "Result: No reboot needed (file empty)"
|
|
REBOOT_NEEDED=0
|
|
else
|
|
PKGSCOUNT=$(${WCBINARY} -l < ${FILE})
|
|
LogText "Result: reboot is needed, related to ${PKGSCOUNT} packages"
|
|
for I in ${FIND}; do
|
|
LogText "Package: ${I}"
|
|
done
|
|
REBOOT_NEEDED=1
|
|
fi
|
|
else
|
|
LogText "Result: file ${FILE} not found"
|
|
fi
|
|
# Check if /boot exists
|
|
if [ -d ${ROOTDIR}boot ]; then
|
|
LogText "Result: /boot exists, performing more tests from here"
|
|
FIND=$(${LSBINARY} ${ROOTDIR}boot/* 2> /dev/null)
|
|
if [ ! -z "${FIND}" ]; then
|
|
if [ -f ${ROOTDIR}boot/vmlinuz -a ! -L ${ROOTDIR}boot/vmlinuz ]; then
|
|
LogText "Result: found /boot/vmlinuz (not symlinked)"
|
|
NEXTLINE=0
|
|
FINDVERSION=""
|
|
for I in $(file ${ROOTDIR}boot/vmlinuz-linux); do
|
|
if [ ${NEXTLINE} -eq 1 ]; then
|
|
FINDVERSION="${I}"
|
|
else
|
|
# Searching for the Linux kernel after the keyword 'version'
|
|
if [ "${I}" = "version" ]; then NEXTLINE=1; fi
|
|
fi
|
|
done
|
|
if [ ! -z "${FINDVERSION}" ]; then
|
|
CURRENT_KERNEL=$(uname -r)
|
|
if [ ! "${CURRENT_KERNEL}" = "${FINDVERSION}" ]; then
|
|
LogText "Result: reboot needed, as current kernel is different than the one loaded"
|
|
REBOOT_NEEDED=1
|
|
fi
|
|
else
|
|
ReportException "${TEST_NO}:1" "Can't determine kernel version on disk, need debug data"
|
|
fi
|
|
elif [ -f ${ROOTDIR}boot/vmlinuz-linux ]; then
|
|
LogText "Result: /found /boot/vmlinuz-linux (usually Arch Linux or similar)"
|
|
LogText "Test: checking kernel version on disk"
|
|
VERSION_ON_DISK=$(${FILEBINARY} -b ${ROOTDIR}boot/vmlinuz-linux | ${AWKBINARY} '{ if ($1=="Linux" && $7=="version") { print $8 }}')
|
|
if [ ! -z "${VERSION_ON_DISK}" ]; then
|
|
LogText "Result: found version ${VERSION_ON_DISK}"
|
|
ACTIVE_KERNEL=$(uname -r)
|
|
LogText "Result: active kernel version ${ACTIVE_KERNEL}"
|
|
if [ "${VERSION_ON_DISK}" = "${ACTIVE_KERNEL}" ]; then
|
|
REBOOT_NEEDED=0
|
|
LogText "Result: no reboot needed, active kernel is the same version as the one on disk"
|
|
else
|
|
REBOOT_NEEDED=1
|
|
LogText "Result: reboot needed, as there is a difference between active kernel and the one on disk"
|
|
fi
|
|
else
|
|
LogText "Result: could not find the version on disk"
|
|
ReportException "${TEST_NO}:4" "Could not find the kernel version from /boot/vmlinux-linux"
|
|
fi
|
|
else
|
|
if [ -L ${ROOTDIR}boot/vmlinuz ]; then
|
|
LogText "Result: found symlink of ${ROOTDIR}boot/vmlinuz, skipping file"
|
|
else
|
|
LogText "Result: ${ROOTDIR}boot/vmlinuz not on disk, trying to find ${ROOTDIR}boot/vmlinuz*"
|
|
fi
|
|
# Extra current kernel version and replace dashes to allow numeric ${SORTBINARY} later on
|
|
MYKERNEL=$(${UNAMEBINARY} -r | ${SEDBINARY} 's/\.[a-z].*.//g' | ${SEDBINARY} 's/-[a-z].*.//g' | ${SEDBINARY} 's/-/./g')
|
|
LogText "Result: using ${MYKERNEL} as my kernel version (stripped)"
|
|
FIND=$(ls ${ROOTDIR}boot/vmlinuz* 2> /dev/null)
|
|
if [ ! -z "${FIND}" ]; then
|
|
for ITEM in ${FIND}; do
|
|
LogText "Result: found ${ITEM}"
|
|
done
|
|
# Display kernels, extract version numbers and ${SORTBINARY} them numeric per column (up to 6 numbers)
|
|
# Ignore rescue images. Remove generic. and huge. for Slackware machines
|
|
LogText "Action: checking relevant kernels"
|
|
KERNELS=$(${LSBINARY} /boot/vmlinuz* | ${GREPBINARY} -v rescue | ${SEDBINARY} 's/vmlinuz-//' | ${SEDBINARY} 's/generic.//' | ${SEDBINARY} 's/huge.//' | ${SEDBINARY} 's/\.[a-z].*.//g' | ${SEDBINARY} 's/-[a-z].*.//g' | ${SEDBINARY} 's./boot/..' | ${SEDBINARY} 's/-/./g' | ${SORTBINARY} -n -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 -k6,6 -t \.)
|
|
KERNELS_ONE_LINE=$(echo ${KERNELS} | ${TRBINARY} '\n' ' ')
|
|
LogText "Output: ${KERNELS_ONE_LINE}"
|
|
elif [ ! "$(ls ${ROOTDIR}boot/kernel* 2> /dev/null)" = "" ]; then
|
|
LogText "Output: Found a kernel file in ${ROOTDIR}boot"
|
|
# Display kernels, extract version numbers and ${SORTBINARY} them numeric per column (up to 6 numbers)
|
|
# Examples:
|
|
# /boot/kernel-genkernel-x86_64-3.14.14-gentoo
|
|
KERNELS=$(${LSBINARY} ${ROOTDIR}boot/kernel* | ${AWKBINARY} -F- '{ if ($2=="genkernel") { print $4 }}' | ${GREPBINARY} "^[0-9]" | ${SORTBINARY} -n -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 -k6,6 -t \.)
|
|
if [ ! -z "${KERNELS}" ]; then LogText "Output: ${KERNELS}"; fi
|
|
else
|
|
ReportException "${TEST_NO}:2" "Can not find any vmlinuz or kernel files in /boot, which is unexpected"
|
|
fi
|
|
if [ ! -z "${KERNELS}" ]; then
|
|
FOUND_KERNEL=0
|
|
for I in ${KERNELS}; do
|
|
# Check if we already found a kernel and it is not equal to what we run (e.g. double versions may exist)
|
|
if [ ${FOUND_KERNEL} -eq 1 -a ! "${MYKERNEL}" = "${I}" ]; then
|
|
LogText "Result: found a kernel (${I}) later than active kernel (${MYKERNEL})"
|
|
REBOOT_NEEDED=1
|
|
fi
|
|
if [ "${MYKERNEL}" = "${I}" ]; then
|
|
FOUND_KERNEL=1
|
|
LogText "Result: found ${I} (= active kernel)"
|
|
else
|
|
LogText "Result: found ${I}"
|
|
fi
|
|
done
|
|
# Check if we at least found the kernel on disk
|
|
if [ ${FOUND_KERNEL} -eq 0 ]; then
|
|
ReportException "${TEST_NO}:3" "Could not find our running kernel on disk, which is unexpected"
|
|
else
|
|
# If we are not sure yet reboot it needed, but we found running kernel as last one on disk, we run latest kernel
|
|
if [ ${REBOOT_NEEDED} -eq 2 ]; then
|
|
LogText "Result: found the running kernel on disk being the last entry, so it looks up-to-date"
|
|
REBOOT_NEEDED=0
|
|
fi
|
|
fi
|
|
fi
|
|
fi
|
|
# No files in /boot
|
|
else
|
|
LogText "Result: Skipping this test, as there are no files in /boot"
|
|
fi
|
|
else
|
|
LogText "Result: /boot does not exist"
|
|
fi
|
|
|
|
# Display discovered status
|
|
if [ ${REBOOT_NEEDED} -eq 0 ]; then
|
|
Display --indent 2 --text "- Check if reboot is needed" --result "${STATUS_NO}" --color GREEN
|
|
AddHP 5 5
|
|
elif [ ${REBOOT_NEEDED} -eq 1 ]; then
|
|
Display --indent 2 --text "- Check if reboot is needed" --result "${STATUS_YES}" --color RED
|
|
ReportWarning ${TEST_NO} "Reboot of system is most likely needed" "" "text:reboot"
|
|
AddHP 0 5
|
|
else
|
|
Display --indent 2 --text "- Check if reboot is needed" --result "${STATUS_UNKNOWN}" --color YELLOW
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
|
|
WaitForKeyPress
|
|
|
|
#
|
|
#================================================================================
|
|
# Lynis - Copyright 2007-2018, CISOfy - https://cisofy.com
|