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#!/bin/sh
################################################################################
# #
# Copyright (C) 2008-2012 LABBE Corentin <corentin.labbe@geomatys.fr>
#
# YASAT is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# YASAT is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with YASAT. If not, see <http://www.gnu.org/licenses/>.
# #
################################################################################
Title "Check Kernel version and configuration"
#check securelevel
#TODO check also value in /etc/rc.securelevel
if [ "$OS_TYPE" = 'OpenBSD' ]
then
SECURELEVEL="`$BSD_SYSCTL kern.securelevel | cut -d\= -f2`"
if [ $SECURELEVEL -ge 0 ]
then
Display --indent 2 --text "Secure level" --result "$SECURELEVEL" --color BLUE
else
Display --indent 2 --text "Secure level" --result "$SECURELEVEL" --color RED --advice OPENBSD_SECURE_LEVEL_BELOW_ZERO
fi
return 1;
fi
#TODO Made some checks Under BSD
if [ "$OS_TYPE" != 'Linux' ] ;then
Display --indent 2 --text "Other OS than linux" --result TODO --color BLUE
return 1;
fi
#Generaly on a server usb modules should not be loaded by default
#TODO check for monolithic addition of USB
#if /proc/modules dont exists, lsmod fail
if [ -e /proc/modules ] ; then
USB_FOUND=0
FIRE_FOUND=0
USB_MODULES='uhci_hcd ohci_hcd ehci_hcd usb_storage usbnet'
TMP_RESULT="${TEMPYASATDIR}/lsmod.out"
lsmod > $TMP_RESULT 2> $ERROR_OUTPUT_FILE
if [ $? -eq 0 ] ; then
for usbmodule in $USB_MODULES
do
if [ ! -z "`grep ^$usbmodule[[:space:]] $TMP_RESULT`" ] ; then
Display --indent 2 --text "USB module $usbmodule" --result FOUND --color ORANGE --advice KERNEL_USB_MODULES
USB_FOUND=1
fi
done
if [ $USB_FOUND -eq 0 ] ; then
Display --indent 2 --text "Checking for unnecessary modules.. USB" --result NOTFOUND --color GREEN
fi
else
if [ -e $TMP_RESULT ] ; then
rm $TMP_RESULT
fi
Display --indent 2 --text "Checking modules with lsmod" --result FAILED --color ORANGE
fi
FIREWIRE_MODULES='firewire-sbp2 firewire-ohci firewire-core'
TMP_RESULT="${TEMPYASATDIR}/lsmod.out"
lsmod > $TMP_RESULT 2> $ERROR_OUTPUT_FILE
if [ $? -eq 0 ] ; then
for firemodule in $FIREWIRE_MODULES
do
if [ ! -z "`grep ^$firemodule[[:space:]] $TMP_RESULT`" ] ; then
Display --indent 2 --text "Firewire module $firemodule" --result FOUND --color ORANGE --advice KERNEL_FIREWIRE_MODULES
fi
done
if [ $FIRE_FOUND -eq 0 ] ; then
Display --indent 2 --text "Checking for unnecessary modules.. Firewire" --result NOTFOUND --color GREEN
fi
else
if [ -e $TMP_RESULT ] ; then
rm $TMP_RESULT
fi
Display --indent 2 --text "Checking modules with lsmod" --result FAILED --color ORANGE
fi
else
Display --indent 2 --text "No /proc/modules, cannot check kernel modules" --result NOTFOUND --color BLUE
fi
#TODO FreeBSD security.bsd.see_other_uids
#TODO FreeBSD net.inet.ip.random_id
#kernel.panic = 60
#kernel to test 2.6.24 (vmsplice)
# 2.6.30 and 2.6.30.1 ( tun vulnerability)
#TODO check if we are under virtual machine
#/proc/sys/kernel/randomize_va_space
RANDOM_VA_SPACE="`sysctl kernel.randomize_va_space 2>> $ERROR_OUTPUT_FILE`"
if [ $? -eq 0 ] ; then
RANDOM_VA_SPACE="`sysctl kernel.randomize_va_space | sed 's/^.*=[[:space:]]*//'`"
if [ "$RANDOM_VA_SPACE" -eq 2 ] ; then
Display --indent 2 --text "Randomized va space" --result YES --color GREEN
else
if [ $RANDOM_VA_SPACE -eq 1 ] ; then
Display --indent 2 --text "Randomized va space at level 1 (want level 2)" --result PARTIAL --color ORANGE --advice KERNEL_RANDOM_VA_SPACE
else
Display --indent 2 --text "Randomized va space" --result NO --color RED --advice KERNEL_RANDOM_VA_SPACE
fi
fi
else
Display --indent 2 --text "sysctl" --result FAILED --color ORANGE
fi
#TODO PAX PAGEEXEC SEGEXEC and check type of processor
NXbit=0
if [ -e /proc/cpuinfo ]
then
if [ -z "`grep '^flags' /proc/cpuinfo | grep ' nx '`" ]
then
Display --indent 2 --text "No NX support" --result NOTFOUND --color ORANGE --advice KERNEL_NO_NX_BIT
else
Display --indent 2 --text "NX support" --result FOUND --color GREEN
NXbit=1
fi
else
Display --indent 2 --text "No /proc/cpuinfo" --result NOTFOUND --color BLUE
fi
# http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/release-notes/as-x86/RELEASE-NOTES-U3-x86-en.html
#Exists only under Redhat and clone
if [ -e /proc/sys/kernel/exec-shield ]
then
Display --indent 2 --text "/proc/sys/kernel/exec-shield" --result FOUND --color GREEN
EXECSHIELD="`cat /proc/sys/kernel/exec-shield`"
if [ $EXECSHIELD -ge 1 ]
then
Display --indent 4 --text "exec-shield value $EXECSHIELD" --result GOOD --color GREEN
else
Display --indent 4 --text "exec-shield value $EXECSHIELD" --result DISABLED --color RED --advice KERNEL_EXEC_SHIELD
fi
else
Display --indent 2 --text "/proc/sys/kernel/exec-shield" --result NOTFOUND --color BLUE
fi
#TODO /proc/sys/kernel/exec-shield-randomize
#if [ -e "${TEMPYASATDIR}/kernel_config" ] ;then
# rm "${TEMPYASATDIR}/kernel_config"
#fi
#config can be found at /boot/config-`uname -r`
#if [ -e "/boot/config-`uname -r`" ] ;then
# Display --indent 2 --text "/boot/config-`uname -r`" --result FOUND --color GREEN
# cat "/boot/config-`uname -r`" > "${TEMPYASATDIR}/kernel_config"
#fi
# if user give me the path to a .config, i wont read /proc/config.gz
#if [ -z $YASAT_PATH_TO_KERNEL_CONFIG ] ;then
# YASAT_PATH_TO_KERNEL_CONFIG='/usr/src/linux/.config'
# if [ -e /proc/config.gz ] ;then
# Display --indent 2 --text "/proc/config.gz" --result FOUND --color GREEN
# zcat /proc/config.gz > ${TEMPYASATDIR}/kernel_config
# else
# if [ -e "${TEMPYASATDIR}/kernel_config" ] ;then
# #we have already found .config elsewhere
# Display --indent 2 --text "/proc/config.gz" --result NOTFOUND --color BLUE
# else
# Display --indent 2 --text "/proc/config.gz" --result NOTFOUND --color ORANGE --advice KERNEL_NO_CONFIG
# fi
# fi
#fi
#if [ ! -e "${TEMPYASATDIR}/kernel_config" ] ;then
# if [ -e "$YASAT_PATH_TO_KERNEL_CONFIG" ] ;then
# Display --indent 2 --text "$YASAT_PATH_TO_KERNEL_CONFIG" --result FOUND --color GREEN
# cat "$YASAT_PATH_TO_KERNEL_CONFIG" > ${TEMPYASATDIR}/kernel_config
# else
# Display --indent 2 --text "$YASAT_PATH_TO_KERNEL_CONFIG" --result NOTFOUND --color ORANGE --advice KERNEL_NO_CONFIG
# fi
#fi
prepare_kernel_config
#TODO CC_STACKPROTECTOR_ALL wait until it is "stable"
#TODO if PAX or GRSEC is enabled, check their suboptions
if [ -e "${TEMPYASATDIR}/kernel_config" ];then
if [ ! -z "`grep 'CONFIG_COMPAT_BRK=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_COMPAT_BRK" --result ENABLED --color ORANGE --advice KERNEL_CONFIG_COMPAT_BRK
else
Display --indent 2 --text "CONFIG_COMPAT_BRK" --result DISABLED --color GREEN
fi
if [ ! -z "`grep 'CONFIG_COMPAT_VDSO=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_COMPAT_VDSO" --result ENABLED --color ORANGE --advice KERNEL_CONFIG_COMPAT_VDSO
else
Display --indent 2 --text "CONFIG_COMPAT_VDSO" --result DISABLED --color GREEN
fi
if [ ! -z "`grep 'CONFIG_DEVKMEM=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_DEVKMEM" --result ENABLED --color ORANGE --advice KERNEL_CONFIG_DEVKMEM
else
Display --indent 2 --text "CONFIG_DEVKMEM" --result DISABLED --color GREEN
fi
if [ -z "`grep 'CONFIG_STRICT_DEVMEM=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_STRICT_DEVMEM" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_STRICT_DEVMEM
else
Display --indent 2 --text "CONFIG_STRICT_DEVMEM" --result ENABLED --color GREEN
fi
if [ -e /proc/sys/vm/mmap_min_addr ];then
VALUE="`cat /proc/sys/vm/mmap_min_addr`"
if [ $? -ne 0 ];then
#under Redhat with a non root test this test is denied
Display --indent 2 --text "/proc/sys/vm/mmap_min_addr" --result DENIED --color RED --advice YASAT_DENIED
else
if [ $VALUE -ge 1 ];then
Display --indent 2 --text "/proc/sys/vm/mmap_min_addr" --result "$VALUE" --color GREEN
else
Display --indent 2 --text "/proc/sys/vm/mmap_min_addr" --result "$VALUE" --color RED --advice KERNEL_MMAP_MIN_ADDR
fi
fi
fi
if [ ! -z "`grep 'CONFIG_X86_MCE=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_X86_MCE" --result ENABLED --color GREEN
#TODO check the presence of mcelog
else
Display --indent 2 --text "CONFIG_X86_MCE" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_MCE
fi
if [ ! -z "`grep 'CONFIG_PAX=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_PAX" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_PAX" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_PAX
fi
if [ ! -z "`grep 'CONFIG_GRKERNSEC=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_GRKERNSEC" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_GRKERNSEC" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_GRSEC
fi
if [ ! -z "`grep 'CONFIG_SECURITY_SELINUX=y' ${TEMPYASATDIR}/kernel_config`" ];then
Display --indent 2 --text "CONFIG_SECURITY_SELINUX" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_SECURITY_SELINUX" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_SECURITY_SELINUX
fi
if [ ! -z "`grep 'CONFIG_DEBUG_SET_MODULE_RONX=y' ${TEMPYASATDIR}/kernel_config`" ] ;then
Display --indent 2 --text "CONFIG_DEBUG_SET_MODULE_RONX" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_DEBUG_SET_MODULE_RONX" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_DEBUG_SET_MODULE_RONX
fi
if [ ! -z "`grep 'CONFIG_DEBUG_RODATA=y' ${TEMPYASATDIR}/kernel_config`" ] ;then
Display --indent 2 --text "CONFIG_DEBUG_RODATA" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_DEBUG_RODATA" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_DEBUG_RODATA
fi
if [ ! -z "`grep 'CONFIG_DEBUG_STRICT_USER_COPY_CHECKS=y' ${TEMPYASATDIR}/kernel_config`" ] ;then
Display --indent 2 --text "CONFIG_DEBUG_STRICT_USER_COPY_CHECKS" --result ENABLED --color GREEN
else
Display --indent 2 --text "CONFIG_DEBUG_STRICT_USER_COPY_CHECKS" --result DISABLED --color ORANGE --advice KERNEL_CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
fi
fi
#end of -e "${TEMPYASATDIR}/kernel_config
|
