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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands
# Web site: http://www.rootkit.nl
#
# 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.
#
#################################################################################
#
# Category: Boot and services
#
#################################################################################
#
InsertSection "Boot and services"
#
#################################################################################
#
Display --indent 2 --text "- Checking boot loaders"
BOOT_LOADER="Unknown"
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BOOT_LOADER_FOUND=0
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GRUB_VERSION=0
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#
#################################################################################
#
# Test : BOOT-5121
# Description : Check for GRUB boot loader
Register --test-no BOOT-5121 --weight L --network NO --description "Check for GRUB boot loader presence"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
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logtext "Test: Checking for presence GRUB conf file (/boot/grub/grub.conf or /boot/grub/menu.lst)"
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if [ -f /boot/grub/grub.conf -o -f /boot/grub/menu.lst ]; then
FOUND=1
BOOT_LOADER="GRUB"
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BOOT_LOADER_FOUND=1
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GRUB_VERSION=1
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Display --indent 4 --text "- Checking presence GRUB" --result "OK" --color GREEN
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if [ -f /boot/grub/grub.conf ]; then GRUBCONFFILE="/boot/grub/grub.conf"; else GRUBCONFFILE="/boot/grub/menu.lst"; fi
fi
# GRUB2 configuration file
if [ -f /boot/grub/grub.cfg ]; then
FOUND=1
BOOT_LOADER="GRUB2"
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BOOT_LOADER_FOUND=1
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GRUB_VERSION=2
GRUBCONFFILE="/boot/grub/grub.cfg"
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Display --indent 4 --text "- Checking presence GRUB2" --result FOUND --color GREEN
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logtext "Result: found GRUB2 configuration file (/boot/grub/grub.cfg)"
# YYY password check, when documentation of GRUB2 project is improved
# YYY Add check permission check (600)
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fi
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# Some OSes like Gentoo do not have /boot mounted by default
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if [ -d /boot ]; then
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if [ "`ls /boot/* 2> /dev/null`" = "" -a ! "${GRUB2INSTALLBINARY}" = "" ]; then
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BOOT_LOADER_FOUND=1
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logtext "Result: found empty /boot, however with GRUB2 binary installed. Best guess is that GRUB2 is actually installed, but /boot not mounted"
Display --indent 4 --text "- Checking presence GRUB2" --result "POSSIBLE MATCH" --color YELLOW
ReportManual "${TEST_NO}:01"
fi
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fi
if [ ${FOUND} -eq 0 ]; then
logtext "Result: no GRUB configuration file found."
fi
fi
#
#################################################################################
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#
# Test : BOOT-5122
# Description : Check for GRUB boot loader configuration
if [ ! "${GRUBCONFFILE}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no BOOT-5122 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for GRUB boot password"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Found file ${GRUBCONFFILE}, proceeding with tests."
FileIsReadable ${GRUBCONFFILE}
if [ ${CANREAD} -eq 1 ]; then
FIND=`cat ${GRUBCONFFILE} | grep 'password --md5' | grep -v '^#'`
FIND2=`cat ${GRUBCONFFILE} | grep 'password --encrypted' | grep -v '^#'`
if [ "${FIND}" = "" -a "${FIND2}" = "" ]; then
Display --indent 6 --text "- Checking for password protection" --result WARNING --color RED
logtext "Result: Didn't find MD5/SHA1 hashed password line in GRUB boot file!"
logtext "Risk: user can switch to single user mode by editing current menu items or bypassing them."
logtext "Additional information: Do NOT use a plaintext password, since the grub.conf or menu.lst file is most likely to be world readable!"
logtext "If an unsecured OS like DOS is used, add 'lock' below that entry and setup a password with the password option, to prevent direct system access."
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ReportSuggestion ${TEST_NO} "Set a password on GRUB bootloader to prevent altering boot configuration (e.g. boot in single user mode without password)"
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logtext "Tip: Run grub-crypt or grub-md5-crypt and create a hashed password. Add a line below the line timeout=<value>, add: password --md5 <password hash> or password --encrypted <password hash> for SHA1 encrypted password"
AddHP 0 2
else
Display --indent 6 --text "- Checking for password protection" --result OK --color GREEN
logtext "Result: GRUB has password protection."
AddHP 4 4
fi
else
logtext "Result: Can not read ${GRUBCONFFILE} (no permission)"
fi
fi
#
#################################################################################
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#
# Test : BOOT-5124
# Description : Check for FreeBSD boot loader
Register --test-no BOOT-5124 --os FreeBSD --weight L --network NO --description "Check for FreeBSD boot loader presence"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /boot/boot1 -a -f /boot/boot2 -a -f /boot/loader ]; then
logtext "Result: found boot1, boot2 and loader files in /boot"
Display --indent 4 --text "- Checking presence FreeBSD loader" --result FOUND --color GREEN
BOOT_LOADER="FreeBSD"
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BOOT_LOADER_FOUND=1
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else
logtext "Result: Not all expected files found in /boot"
fi
fi
#
#################################################################################
#
# Test : BOOT-5126
# Description : Check for NetBSD boot loader
Register --test-no BOOT-5126 --os NetBSD --weight L --network NO --description "Check for NetBSD boot loader presence"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /boot.${HARDWARE} -o -f /boot -o -f /ofwboot ]; then
logtext "Result: found NetBSD secondary bootstrap"
Display --indent 4 --text "- Checking presence NetBSD loader" --result FOUND --color GREEN
BOOT_LOADER="NetBSD"
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BOOT_LOADER_FOUND=1
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else
logtext "Result: NetBSD secondary bootstrap not found"
ReportException "${TEST_NO}:1" "No boot loader found on NetBSD"
fi
fi
#
#################################################################################
#
# Test : BOOT-5139
# Description : Check for LILO boot loader
# Notes : password= or password =
Register --test-no BOOT-5139 --weight L --network NO --description "Check for LILO boot loader presence"
if [ ${SKIPTEST} -eq 0 ]; then
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LILOCONFFILE="/etc/lilo.conf"
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logtext "Test: checking for presence LILO configuration file"
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if [ -f ${LILOCONFFILE} ]; then
FileIsReadable ${LILOCONFFILE}
if [ ${CANREAD} -eq 1 ]; then
BOOT_LOADER="LILO"
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BOOT_LOADER_FOUND=1
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Display --indent 4 --text "- Checking presence LILO" --result "OK" --color GREEN
logtext "Checking password option LILO"
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FIND=`cat ${LILOCONFFILE} | ${EGREPBINARY} 'password[[:space:]]?=' | grep -v "^#"`
if [ "${FIND}" = "" ]; then
Display --indent 6 --text "- Password option presence " --result "WARNING" --color RED
logtext "Result: no password set for LILO. Bootloader is unprotected to"
logtext "dropping to single user mode or unauthorized access to devices/data."
ReportSuggestion ${TEST_NO} "Add a password to LILO, by adding a line to the lilo.conf file, above the first line saying 'image=<name>': password=<password>"
ReportWarning ${TEST_NO} "M" "No password set on LILO bootloader"
AddHP 0 2
else
Display --indent 6 --text "- Password option presence " --result "OK" --color GREEN
logtext "Result: LILO password option set"
AddHP 4 4
fi
#YYY (making /etc/lilo.conf immutable is a good idea, chattr +i /etc/lilo.conf)
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else
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logtext "Result: can not read ${LILOCONFFILE} (no permission)"
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fi
else
logtext "Result: LILO configuration file not found"
fi
fi
#
#################################################################################
#
# Test : BOOT-5142
# Description : Check for SILO boot loader
Register --test-no BOOT-5142 --weight L --network NO --description "Check SPARC Improved boot loader (SILO)"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /etc/silo.conf ]; then
logtext "Result: Found SILO configuration file (/etc/silo.conf)"
Display --indent 4 --text "- Checking boot loader SILO" --result FOUND --color GREEN
BOOT_LOADER="SILO"
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BOOT_LOADER_FOUND=1
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else
logtext "Result: no SILO configuration file found."
fi
fi
#
#################################################################################
#
# Test : BOOT-5144
# Description : Check for SILO boot loader consistency
# Notes : To be tested on Gentoo
# Register --test-no BOOT-5144 --weight L --network NO --description "Check SPARC Improved boot loader (SILO)"
# if [ ${SKIPTEST} -eq 0 ]; then
# if [ -f /etc/silo.conf -a -x /sbin/silo ]; then
# FIND=`/sbin/silo | grep "appears to be valid"`
# if [ ! "${FIND}" = "" ]; then
# logtext "Result: Found SILO configuration file (/etc/silo.conf)"
# Display --indent 6 --text "- Checking SILO consistency" --result OK --color GREEN
# else
# logtext "Result: no positive result received from silo binary"
# ReportWarning ${TEST_NO} "Possible issue with boot loader (SILO)"
# Display --indent 6 --text "- Checking SILO consistency" --result WARNING --color RED
# fi
# fi
# fi
#
#################################################################################
#
# Test : BOOT-5155
# Description : Check for YABOOT boot loader
Register --test-no BOOT-5155 --weight L --network NO --description "Check for YABOOT boot loader configuration file"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Check for /etc/yaboot.conf"
if [ -f /etc/yaboot.conf ]; then
logtext "Result: Found YABOOT configuration file (/etc/yaboot.conf)"
Display --indent 4 --text "- Checking boot loader YABOOT" --result FOUND --color GREEN
#YYY add permission check
BOOT_LOADER="YABOOT"
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BOOT_LOADER_FOUND=1
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else
logtext "Result: no YABOOT configuration file found."
fi
fi
#
#################################################################################
#
# Test : BOOT-5159
# Description : Check for OpenBSD boot loader
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# More info : Only OpenBSD && i386 platform
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Register --test-no BOOT-5159 --os OpenBSD --platform i386 --weight L --network NO --description "Check for OpenBSD i386 boot loader presence"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /etc/boot.conf ]; then
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BOOT_LOADER="OpenBSD"
BOOT_LOADER_FOUND=1
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Display --indent 2 --text "- Checking /etc/boot.conf" --result "FOUND" --color GREEN
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FIND=`grep '^boot' /etc/boot.conf`
if [ "${FIND}" = "" ]; then
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Display --indent 4 --text "- Checking boot option" --result WARNING --color RED
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#ReportSuggestion ${TEST_NO} "Add 'boot' to the /etc/boot.conf file to disable the default 5 seconds waiting time, to disallow booting into single user mode."
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ReportWarning ${TEST_NO} "M" "System can be booted into single user mode without password"
else
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Display --indent 4 --text "- Checking boot option" --result OK --color GREEN
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logtext "Ok, boot option is enabled."
fi
else
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Display --indent 2 --text "- Checking /etc/boot.conf" --result "NOT FOUND" --color YELLOW
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logtext "Result: no /etc/boot.conf found. When using the default boot loader, physical"
logtext "access to the server can be used to possibly enter single user mode."
ReportSuggestion ${TEST_NO} "Add 'boot' to the /etc/boot.conf file to disable the default 5 seconds waiting time."
fi
fi
#
#################################################################################
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#
if [ ${BOOT_LOADER_FOUND} -eq 0 ]; then
# Your boot loader is not detected. Want to help supporting it, see the README
ReportException "BOOTLOADER" "No boot loader found"
Display --indent 4 --text "- Boot loader" --result "NONE FOUND" --color RED
fi
#
#################################################################################
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#
# Test : BOOT-5165
# Description : Check for FreeBSD boot services
Register --test-no BOOT-5165 --os FreeBSD --weight L --network NO --description "Check for FreeBSD boot services"
if [ ${SKIPTEST} -eq 0 ]; then
# FreeBSD (Read /etc/rc.conf file for enabled services)
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logtext "Searching for services at startup (rc.conf)"
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FIND=`egrep -v -i '^#|none' /etc/rc.conf | egrep -i '_enable.*(yes|on|1)' | sort | awk -F= '{ print $1 }' | sed 's/_enable//'`
N=0
for I in ${FIND}; do
logtext "Found service (rc.conf): ${I}"
report "boottask[]=${I}"
N=`expr ${N} + 1`
done
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Display --indent 2 --text "- Checking services at startup (rc.conf)" --result "DONE" --color GREEN
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Display --indent 6 --text "Result: found $N services/options set"
logtext "Found $N services/options to run at startup"
fi
#
#################################################################################
#
# Test : BOOT-5166
# Description : Check for /etc/rc.local file (and contents)
#
#################################################################################
#
# Test : BOOT-5177
# Description : Check for Linux boot services (systemd and chkconfig)
# Notes : We skip using chkconfig if systemd is being used.
Register --test-no BOOT-5177 --os Linux --weight L --network NO --description "Check for Linux boot and running services"
if [ ${SKIPTEST} -eq 0 ]; then
CHECKED=0
logtext "Test: checking presence systemctl binary"
# Determine if we have systemctl on board
if [ ! "${SYSTEMCTLBINARY}" = "" ]; then
logtext "Result: systemctl binary found, trying that to discover information"
# Running services
logtext "Searching for running services (systemctl services only)"
FIND=`${SYSTEMCTLBINARY} --full --type=service | awk '{ if ($4=="running") { print $1 } }' | awk -F. '{ print $1 }'`
N=0
report "running_service_tool=systemctl"
for I in ${FIND}; do
logtext "Found running service: ${I}"
report "running_service[]=${I}"
N=`expr ${N} + 1`
done
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logtext "Note: Run systemctl --full --type=service to see all services"
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Display --indent 2 --text "- Check running services (systemctl)" --result "DONE" --color GREEN
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Display --indent 8 --text "Result: found $N running services"
logtext "Result: Found $N enabled services"
# Services at boot
logtext "Searching for enabled services (systemctl services only)"
FIND=`${SYSTEMCTLBINARY} list-unit-files --type=service | awk '{ if ($2=="enabled") { print $1 } }' | awk -F. '{ print $1 }'`
N=0
report "boot_service_tool=systemctl"
for I in ${FIND}; do
logtext "Found enabled service at boot: ${I}"
report "boot_service[]=${I}"
N=`expr ${N} + 1`
done
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logtext "Note: Run systemctl list-unit-files --type=service to see all services"
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Display --indent 2 --text "- Check enabled services at boot (systemctl)" --result "DONE" --color GREEN
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Display --indent 8 --text "Result: found $N enabled services"
logtext "Result: Found $N running services"
else
logtext "Result: systemctl binary not found, checking chkconfig binary"
if [ ! "${CHKCONFIGBINARY}" = "" ]; then
logtext "Result: chkconfig binary found, trying that to discover information"
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logtext "Searching for services at startup (chkconfig, runlevel 3 and 5)"
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FIND=`${CHKCONFIGBINARY} --list | egrep '3:on|5:on' | awk '{ print $1 }'`
N=0
report "boot_service_tool=chkconfig"
for I in ${FIND}; do
logtext "Found service (at boot, runlevel 3 or 5): ${I}"
report "boot_service[]=${I}"
N=`expr ${N} + 1`
done
logtext "Suggestion: Run chkconfig --list to see all services and disable unneeded services"
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Display --indent 2 --text "- Check services at startup (chkconfig)" --result "DONE" --color GREEN
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Display --indent 8 --text "Result: found $N services"
logtext "Result: Found $N services at startup"
else
logtext "Result: both systemctl and chkconfig not found. Skipping this test"
fi
fi
fi
#
#################################################################################
#
# Test : BOOT-5178
# Description : Check for Linux boot services (Red Hat style)
# if [ ! "${CHKCONFIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
# Register --test-no BOOT-5178 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for unneeded Linux boot services (Red Hat style)"
# if [ ${SKIPTEST} -eq 0 ]; then
# N=0
# N=`expr ${N} + 1`
#* mctrans (if selinux is NOT enabled)
#* restorecond (if selinux is NOT enabled) --> and is it really needed?
#
# if profile is server, warn if found:
#* pcscd (if profile=server)
#* avahi-daemon
# Redhat: /etc/sysconfig/network
# check if NOZEROCONF=yes is available
#
#* xfs (if /usr/bin/startx is not found)
#
#if [ ! -f /etc/mdadm.conf -a ! -f /etc/mdadm/mdadm.conf ]; then
#* mdmonitor
#
#
#* firstboot
# Display warning if [ ! -f /etc/reconfigSys ]
# AND "RUN_FIRSTBOOT=YES" is NOT in /etc/sysconfig/firstboot
#
#* acpid
# Display warning if no modules are loaded (lsmod | grep -i acpi)
#
#
# fi
#
#################################################################################
#
# Test : BOOT-5180
# Description : Check for Linux boot services (Debian style)
if [ "${LINUX_VERSION}" = "Debian" -o "${LINUX_VERSION}" = "Ubuntu" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no BOOT-5180 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for Linux boot services (Debian style)"
if [ ${SKIPTEST} -eq 0 ]; then
# YYY runlevel check
sRUNLEVEL=`${RUNLEVELBINARY} | grep "N 2"`
if [ ! "${sRUNLEVEL}" = "" ]; then
FIND=`find /etc/rc2.d -type l -print | cut -d '/' -f4 | sed "s/S[0-9][0-9]//g" | sort`
if [ ! "${FIND}" = "" ]; then
N=0
for I in ${FIND}; do
logtext "Found service (at boot, runlevel 2): ${I}"
N=`expr ${N} + 1`
done
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Display --indent 2 --text "- Check services at startup (rc2.d)" --result "DONE" --color WHITE
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Display --indent 4 --text "Result: found $N services"
logtext "Found $N services"
fi
else
ReportSuggestion ${TEST_NO} "Determine runlevel and services at startup"
fi
fi
#
#################################################################################
#
# Test : BOOT-5184
# Description : Check world writable startup scripts
Register --test-no BOOT-5184 --os Linux --weight L --network NO --description "Check permissions for boot files/scripts"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
CHECKDIRS="/etc/init.d /etc/rc.d /etc/rcS.d"
logtext "Result: checking /etc/init.d scripts for writable bit"
for I in ${CHECKDIRS}; do
logtext "Test: checking if directory ${I} exists"
if [ -d ${I} ]; then
logtext "Result: directory ${I} found"
logtext "Test: checking for available files in directory"
FIND=`find ${I} -type f -print`
if [ ! "${FIND}" = "" ]; then
logtext "Result: found files in directory, checking permissions now"
for J in ${FIND}; do
logtext "Test: checking permissions of file ${J}"
IsWorldWritable ${J}
if [ "${FileIsWorldWritable}" = "TRUE" ]; then
logtext "Result: warning, file ${J} is world writable"
FOUND=1
else
logtext "Result: good, file ${J} not world writable"
fi
done
else
logtext "Result: found no files in directory."
fi
else
logtext "Result: directory ${I} not found. Skipping.."
fi
done
# /etc/rc[0-6].d
for NO in 0 1 2 3 4 5 6; do
logtext "Test: Checking /etc/rc${NO}.d scripts for writable bit"
if [ -d /etc/rc${NO}.d ]; then
FIND=`find /etc/rc${NO}.d -type f -print`
for I in ${FIND}; do
IsWorldWritable ${I}
if [ "${FileIsWorldWritable}" = "TRUE" ]; then
logtext "Result: warning, file ${I} is world writable"
FOUND=1
else
logtext "Result: good, file ${I} not world writable"
fi
done
fi
done
# Other files
CHECKFILES="/etc/rc /etc/rc.local /etc/rc.d/rc.sysinit"
for I in ${CHECKFILES}; do
if [ -f ${I} ]; then
logtext "Test: Checking ${I} file for writable bit"
IsWorldWritable ${I}
if [ "${FileIsWorldWritable}" = "TRUE" ]; then
ReportWarning ${TEST_NO} "H" "Found writable startup script ${I}"
FOUND=1
logtext "Result: warning, file ${I} is world writable"
else
logtext "Result: good, file ${I} not world writable"
fi
fi
done
# Check results
if [ ${FOUND} -eq 1 ]; then
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Display --indent 2 --text "- Check startup files (permissions)" --result "WARNING" --color RED
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ReportWarning ${TEST_NO} "H" "One or more startup files can be overwritten by all users"
ReportSuggestion ${TEST_NO} "Check startup scripts for world write access and change permissions if needed"
logtext "Result: found one or more scripts which are possibly writable by other users"
AddHP 0 3
else
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Display --indent 2 --text "- Check startup files (permissions)" --result "OK" --color GREEN
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AddHP 3 3
fi
fi
#
#################################################################################
#
# Add autostart services, like from KDE/Gnome
# Test : BOOT-5102
# Description : Check for tasks which are autostarted via /etc/inittab
#Register --test-no BOOT-5102 --weight L --network NO --description "Check inittab for services"
#if [ ${SKIPTEST} -eq 0 ]; then
#fi
#YYY check against static list?
#
#################################################################################
#
# Test : BOOT-5202
# Description : Check uptime of system
Register --test-no BOOT-5202 --weight L --network NO --description "Check uptime of system"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
FIND=""
case "${OS}" in
Linux)
# Idle time, not real uptime
if [ -f /proc/uptime ]; then
FIND=`cat /proc/uptime | cut -d ' ' -f1 | cut -d '.' -f1`
else
Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW
ReportException "${TEST_NO}:1" "No uptime test available for this operating system (/proc/uptime missing)"
fi
;;
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MacOS)
if [ ! "${SYSCTLBINARY}" = "" ]; then
FIND=`${SYSCTLBINARY} kern.boottime | awk '{ print $5 }' | sed -e 's/,//'`
else
Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW
ReportException "${TEST_NO}:3" "No uptime test available for this operating system (sysctl missing)"
fi
;;
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Solaris)
if [ ! "${KSTATBINARY}" = "" ]; then
FIND=`${KSTATBINARY} -p unix:0:system_misc:snaptime | grep "^unix" | awk '{print $2}' | cut -d "." -f1`
else
Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW
ReportException "${TEST_NO}:2" "No uptime test available for this operating system (kstat missing)"
fi
;;
*)
Display --indent 2 --text "- Checking uptime" --result SKIPPED --color YELLOW
# Want to help improving Lynis? Share your operating system and a way to determine the uptime (in seconds)
ReportException "${TEST_NO}:3" "No uptime test available yet for this operating system"
;;
esac
if [ ! "${FIND}" = "" ]; then
UPTIME_IN_SECS="${FIND}"
UPTIME_IN_DAYS=`expr ${UPTIME_IN_SECS} / 60 / 60 / 24`
logtext "Uptime (in seconds): ${UPTIME_IN_SECS}"
logtext "Uptime (in days): ${UPTIME_IN_DAYS}"
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report "uptime_in_seconds=${UPTIME_IN_SECS}"
report "uptime_in_days=${UPTIME_IN_DAYS}"
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else
logtext "Result: no uptime information available"
fi
fi
#
#################################################################################
#
report "boot_loader=${BOOT_LOADER}"
wait_for_keypress
#
#================================================================================
# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands
