Merge pull request #31 from Feandil/batch
Add a "batch" and "verbose" mode
This commit is contained in:
Stéphane Lesimple
GitHub
commit
1c3d349667
|
|
@ -10,11 +10,225 @@
|
|||
#
|
||||
VERSION=0.20
|
||||
|
||||
# Script configuration
|
||||
show_usage()
|
||||
{
|
||||
cat <<EOF
|
||||
Usage:
|
||||
Live mode: $0 [options] [--live]
|
||||
Offline mode: $0 [options] [--kernel <vmlinux_file>] [--config <kernel_config>] [--map <kernel_map_file>]
|
||||
|
||||
Modes:
|
||||
Two modes are available.
|
||||
|
||||
First mode is the "live" mode (default), it does its best to find information about the currently running kernel.
|
||||
To run under this mode, just start the script without any option (you can also use --live explicitely)
|
||||
|
||||
Second mode is the "offline" mode, where you can inspect a non-running kernel.
|
||||
You'll need to specify the location of the vmlinux file, and if possible, the corresponding config and System.map files:
|
||||
|
||||
--kernel vmlinux_file Specify a (possibly compressed) vmlinux file
|
||||
--config kernel_config Specify a kernel config file
|
||||
--map kernel_map_file Specify a kernel System.map file
|
||||
|
||||
Options:
|
||||
--no-color Don't use color codes
|
||||
-v, --verbose Increase verbosity level
|
||||
--batch Produce machine readable output
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
# parse options
|
||||
opt_kernel=''
|
||||
opt_config=''
|
||||
opt_map=''
|
||||
opt_live_explicit=0
|
||||
opt_live=1
|
||||
opt_no_color=0
|
||||
opt_batch=0
|
||||
opt_verbose=1
|
||||
|
||||
__echo()
|
||||
{
|
||||
opt="$1"
|
||||
shift
|
||||
msg="$@"
|
||||
if [ "$opt_no_color" = 1 ] ; then
|
||||
# strip ANSI color codes
|
||||
msg=$(/bin/echo -e "$msg" | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g")
|
||||
fi
|
||||
# explicitely call /bin/echo to avoid shell builtins that might not take options
|
||||
/bin/echo $opt -e "$msg"
|
||||
}
|
||||
|
||||
_echo()
|
||||
{
|
||||
if [ $opt_verbose -ge $1 ]; then
|
||||
shift
|
||||
__echo '' "$@"
|
||||
fi
|
||||
}
|
||||
|
||||
_echo_nol()
|
||||
{
|
||||
if [ $opt_verbose -ge $1 ]; then
|
||||
shift
|
||||
__echo -n "$@"
|
||||
fi
|
||||
}
|
||||
|
||||
_warn()
|
||||
{
|
||||
_echo 0 "\033[31m${@}\033[0m"
|
||||
}
|
||||
|
||||
_info()
|
||||
{
|
||||
_echo 1 "$@"
|
||||
}
|
||||
|
||||
_info_nol()
|
||||
{
|
||||
_echo_nol 1 "$@"
|
||||
}
|
||||
|
||||
_verbose()
|
||||
{
|
||||
_echo 2 "$@"
|
||||
}
|
||||
|
||||
is_cpu_vulnerable()
|
||||
{
|
||||
# param: 1, 2 or 3 (variant)
|
||||
# returns 1 if vulnerable, 0 if not vulnerable, 255 on error
|
||||
# by default, everything is vulnerable, we work in a "whitelist" logic here.
|
||||
# usage: is_cpu_vulnerable 2 && do something if vulnerable
|
||||
variant1=0
|
||||
variant2=0
|
||||
variant3=0
|
||||
if grep -q AMD /proc/cpuinfo; then
|
||||
variant1=0
|
||||
variant2=1
|
||||
variant3=1
|
||||
elif grep -qi 'CPU implementer : 0x41' /proc/cpuinfo; then
|
||||
# ARM
|
||||
# reference: https://developer.arm.com/support/security-update
|
||||
cpupart=$(awk '/CPU part :/ {print $4;exit}' /proc/cpuinfo)
|
||||
cpuarch=$(awk '/CPU architecture:/ {print $3;exit}' /proc/cpuinfo)
|
||||
if [ -n "$cpupart" -a -n "$cpuarch" ]; then
|
||||
# Cortex-R7 and Cortex-R8 are real-time and only used in medical devices or such
|
||||
# I can't find their CPU part number, but it's probably not that useful anyway
|
||||
# model R7 R8 A9 A15 A17 A57 A72 A73 A75
|
||||
# part ? ? 0xc09 0xc0f 0xc0e 0xd07 0xd08 0xd09 0xd0a
|
||||
# arch 7? 7? 7 7 7 8 8 8 8
|
||||
if [ "$cpuarch" = 7 ] && echo "$cpupart" | grep -Eq '^0x(c09|c0f|c0e)$'; then
|
||||
# armv7 vulnerable chips
|
||||
variant1=0
|
||||
variant2=0
|
||||
elif [ "$cpuarch" = 8 ] && echo "$cpupart" | grep -Eq '^0x(d07|d08|d09|d0a)$'; then
|
||||
# armv8 vulnerable chips
|
||||
variant1=0
|
||||
variant2=0
|
||||
else
|
||||
variant1=1
|
||||
variant2=1
|
||||
fi
|
||||
# for variant3, only A75 is vulnerable
|
||||
if [ "$cpuarch" = 8 -a "$cpupart" = 0xd0a ]; then
|
||||
variant3=0
|
||||
else
|
||||
variant3=1
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
[ "$1" = 1 ] && return $variant1
|
||||
[ "$1" = 2 ] && return $variant2
|
||||
[ "$1" = 3 ] && return $variant3
|
||||
return 255
|
||||
}
|
||||
|
||||
show_header()
|
||||
{
|
||||
_info "\033[1;34mSpectre and Meltdown mitigation detection tool v$VERSION\033[0m"
|
||||
_info
|
||||
}
|
||||
|
||||
parse_opt_file()
|
||||
{
|
||||
# parse_opt_file option_name option_value
|
||||
option_name="$1"
|
||||
option_value="$2"
|
||||
if [ -z "$option_value" ]; then
|
||||
show_header
|
||||
show_usage
|
||||
echo "$0: error: --$option_name expects one parameter (a file)" >&2
|
||||
exit 1
|
||||
elif [ ! -e "$option_value" ]; then
|
||||
show_header
|
||||
echo "$0: error: couldn't find file $option_value" >&2
|
||||
exit 1
|
||||
elif [ ! -f "$option_value" ]; then
|
||||
show_header
|
||||
echo "$0: error: $option_value is not a file" >&2
|
||||
exit 1
|
||||
elif [ ! -e "$option_value" ]; then
|
||||
show_header
|
||||
echo "$0: error: couldn't read $option_value (are you root?)" >&2
|
||||
exit 1
|
||||
fi
|
||||
echo "$option_value"
|
||||
exit 0
|
||||
}
|
||||
|
||||
while [ -n "$1" ]; do
|
||||
if [ "$1" = "--kernel" ]; then
|
||||
opt_kernel=$(parse_opt_file kernel "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--config" ]; then
|
||||
opt_config=$(parse_opt_file config "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--map" ]; then
|
||||
opt_map=$(parse_opt_file map "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--live" ]; then
|
||||
opt_live_explicit=1
|
||||
shift
|
||||
elif [ "$1" = "--no-color" ]; then
|
||||
opt_no_color=1
|
||||
shift
|
||||
elif [ "$1" = "--batch" ]; then
|
||||
opt_batch=1
|
||||
opt_verbose=0
|
||||
shift
|
||||
elif [ "$1" = "-v" -o "$1" = "--verbose" ]; then
|
||||
opt_verbose=$(expr $opt_verbose + 1)
|
||||
shift
|
||||
elif [ "$1" = "-h" -o "$1" = "--help" ]; then
|
||||
show_header
|
||||
show_usage
|
||||
exit 0
|
||||
else
|
||||
show_header
|
||||
show_usage
|
||||
echo "$0: error: unknown option '$1'"
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
show_header
|
||||
|
||||
# print status function
|
||||
pstatus()
|
||||
{
|
||||
if [ "$opt_no_color" = 1 ]; then
|
||||
_echo_nol "$2"
|
||||
_info_nol "$2"
|
||||
else
|
||||
case "$1" in
|
||||
red) col="\033[101m\033[30m";;
|
||||
|
|
@ -23,12 +237,28 @@ pstatus()
|
|||
blue) col="\033[104m\033[30m";;
|
||||
*) col="";;
|
||||
esac
|
||||
_echo_nol "$col $2 \033[0m"
|
||||
_info_nol "$col $2 \033[0m"
|
||||
fi
|
||||
[ -n "$3" ] && _echo_nol " ($3)"
|
||||
_echo
|
||||
[ -n "$3" ] && _info_nol " ($3)"
|
||||
_info
|
||||
}
|
||||
|
||||
# Print the final status of a vulnerability (incl. batch mode)
|
||||
# Arguments are: CVE UNK/OK/VULN description
|
||||
pvulnstatus()
|
||||
{
|
||||
[ "$opt_batch" = 1 ] && _echo 0 "$1: $2 ($3)"
|
||||
_info_nol "> \033[46m\033[30mSTATUS:\033[0m "
|
||||
vulnstatus="$2"
|
||||
shift 2
|
||||
case "$vulnstatus" in
|
||||
UNK) pstatus yellow UNKNOWN "$@";;
|
||||
VULN) pstatus red 'VULNERABLE' "$@";;
|
||||
OK) pstatus green 'NOT VULNERABLE' "$@";;
|
||||
esac
|
||||
}
|
||||
|
||||
|
||||
# The 3 below functions are taken from the extract-linux script, available here:
|
||||
# https://github.com/torvalds/linux/blob/master/scripts/extract-vmlinux
|
||||
# The functions have been modified for better integration to this script
|
||||
|
|
@ -97,171 +327,6 @@ extract_vmlinux()
|
|||
|
||||
# end of extract-vmlinux functions
|
||||
|
||||
show_usage()
|
||||
{
|
||||
cat <<EOF
|
||||
Usage:
|
||||
Live mode: $0 [options] [--live]
|
||||
Offline mode: $0 [options] [--kernel <vmlinux_file>] [--config <kernel_config>] [--map <kernel_map_file>]
|
||||
|
||||
Modes:
|
||||
Two modes are available.
|
||||
|
||||
First mode is the "live" mode (default), it does its best to find information about the currently running kernel.
|
||||
To run under this mode, just start the script without any option (you can also use --live explicitely)
|
||||
|
||||
Second mode is the "offline" mode, where you can inspect a non-running kernel.
|
||||
You'll need to specify the location of the vmlinux file, and if possible, the corresponding config and System.map files:
|
||||
|
||||
--kernel vmlinux_file Specify a (possibly compressed) vmlinux file
|
||||
--config kernel_config Specify a kernel config file
|
||||
--map kernel_map_file Specify a kernel System.map file
|
||||
|
||||
Options:
|
||||
--no-color Don't use color codes
|
||||
|
||||
EOF
|
||||
}
|
||||
|
||||
__echo()
|
||||
{
|
||||
opt="$1"
|
||||
shift
|
||||
msg="$@"
|
||||
if [ "$opt_no_color" = 1 ] ; then
|
||||
# strip ANSI color codes
|
||||
msg=$(echo "$msg" | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g")
|
||||
fi
|
||||
# explicitely call /bin/echo to avoid shell builtins that might not take options
|
||||
/bin/echo $opt -e "$msg"
|
||||
}
|
||||
|
||||
_echo()
|
||||
{
|
||||
__echo '' "$@"
|
||||
}
|
||||
|
||||
_echo_nol()
|
||||
{
|
||||
__echo -n "$@"
|
||||
}
|
||||
|
||||
is_cpu_vulnerable()
|
||||
{
|
||||
# param: 1, 2 or 3 (variant)
|
||||
# returns 1 if vulnerable, 0 if not vulnerable, 255 on error
|
||||
# by default, everything is vulnerable, we work in a "whitelist" logic here.
|
||||
# usage: is_cpu_vulnerable 2 && do something if vulnerable
|
||||
variant1=0
|
||||
variant2=0
|
||||
variant3=0
|
||||
if grep -q AMD /proc/cpuinfo; then
|
||||
variant1=0
|
||||
variant2=1
|
||||
variant3=1
|
||||
elif grep -qi 'CPU implementer : 0x41' /proc/cpuinfo; then
|
||||
# ARM
|
||||
# reference: https://developer.arm.com/support/security-update
|
||||
cpupart=$(awk '/CPU part :/ {print $4;exit}' /proc/cpuinfo)
|
||||
cpuarch=$(awk '/CPU architecture:/ {print $3;exit}' /proc/cpuinfo)
|
||||
if [ -n "$cpupart" -a -n "$cpuarch" ]; then
|
||||
# Cortex-R7 and Cortex-R8 are real-time and only used in medical devices or such
|
||||
# I can't find their CPU part number, but it's probably not that useful anyway
|
||||
# model R7 R8 A9 A15 A17 A57 A72 A73 A75
|
||||
# part ? ? 0xc09 0xc0f 0xc0e 0xd07 0xd08 0xd09 0xd0a
|
||||
# arch 7? 7? 7 7 7 8 8 8 8
|
||||
if [ "$cpuarch" = 7 ] && echo "$cpupart" | grep -Eq '^0x(c09|c0f|c0e)$'; then
|
||||
# armv7 vulnerable chips
|
||||
variant1=0
|
||||
variant2=0
|
||||
elif [ "$cpuarch" = 8 ] && echo "$cpupart" | grep -Eq '^0x(d07|d08|d09|d0a)$'; then
|
||||
# armv8 vulnerable chips
|
||||
variant1=0
|
||||
variant2=0
|
||||
else
|
||||
variant1=1
|
||||
variant2=1
|
||||
fi
|
||||
# for variant3, only A75 is vulnerable
|
||||
if [ "$cpuarch" = 8 -a "$cpupart" = 0xd0a ]; then
|
||||
variant3=0
|
||||
else
|
||||
variant3=1
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
[ "$1" = 1 ] && return $variant1
|
||||
[ "$1" = 2 ] && return $variant2
|
||||
[ "$1" = 3 ] && return $variant3
|
||||
return 255
|
||||
}
|
||||
|
||||
_echo "\033[1;34mSpectre and Meltdown mitigation detection tool v$VERSION\033[0m"
|
||||
_echo
|
||||
|
||||
# parse options
|
||||
opt_kernel=''
|
||||
opt_config=''
|
||||
opt_map=''
|
||||
opt_live_explicit=0
|
||||
opt_live=1
|
||||
opt_no_color=0
|
||||
|
||||
parse_opt_file()
|
||||
{
|
||||
# parse_opt_file option_name option_value
|
||||
option_name="$1"
|
||||
option_value="$2"
|
||||
if [ -z "$option_value" ]; then
|
||||
show_usage
|
||||
echo "$0: error: --$option_name expects one parameter (a file)" >&2
|
||||
exit 1
|
||||
elif [ ! -e "$option_value" ]; then
|
||||
echo "$0: error: couldn't find file $option_value" >&2
|
||||
exit 1
|
||||
elif [ ! -f "$option_value" ]; then
|
||||
echo "$0: error: $option_value is not a file" >&2
|
||||
exit 1
|
||||
elif [ ! -e "$option_value" ]; then
|
||||
echo "$0: error: couldn't read $option_value (are you root?)" >&2
|
||||
exit 1
|
||||
fi
|
||||
echo "$option_value"
|
||||
exit 0
|
||||
}
|
||||
|
||||
while [ -n "$1" ]; do
|
||||
if [ "$1" = "--kernel" ]; then
|
||||
opt_kernel=$(parse_opt_file kernel "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--config" ]; then
|
||||
opt_config=$(parse_opt_file config "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--map" ]; then
|
||||
opt_map=$(parse_opt_file map "$2")
|
||||
[ $? -ne 0 ] && exit $?
|
||||
shift 2
|
||||
opt_live=0
|
||||
elif [ "$1" = "--live" ]; then
|
||||
opt_live_explicit=1
|
||||
shift
|
||||
elif [ "$1" = "--no-color" ]; then
|
||||
opt_no_color=1
|
||||
shift
|
||||
elif [ "$1" = "-h" -o "$1" = "--help" ]; then
|
||||
show_usage
|
||||
exit 0
|
||||
else
|
||||
show_usage
|
||||
echo "$0: error: unknown option '$1'"
|
||||
exit 1
|
||||
fi
|
||||
done
|
||||
|
||||
# check for mode selection inconsistency
|
||||
if [ "$opt_live_explicit" = 1 ]; then
|
||||
if [ -n "$opt_kernel" -o -n "$opt_config" -o -n "$opt_map" ]; then
|
||||
|
|
@ -275,12 +340,12 @@ fi
|
|||
|
||||
if [ "$opt_live" = 1 ]; then
|
||||
if [ "$(id -u)" -ne 0 ]; then
|
||||
_echo "\033[31mNote that you should launch this script with root privileges to get accurate information.\033[0m"
|
||||
_echo "\033[31mWe'll proceed but you might see permission denied errors.\033[0m"
|
||||
_echo "\033[31mTo run it as root, you can try the following command: sudo $0\033[0m"
|
||||
_echo
|
||||
_warn "Note that you should launch this script with root privileges to get accurate information."
|
||||
_warn "We'll proceed but you might see permission denied errors."
|
||||
_warn "To run it as root, you can try the following command: sudo $0"
|
||||
_warn
|
||||
fi
|
||||
_echo "Checking for vulnerabilities against live running kernel \033[35m"$(uname -s) $(uname -r) $(uname -v) $(uname -m)"\033[0m"
|
||||
_info "Checking for vulnerabilities against live running kernel \033[35m"$(uname -s) $(uname -r) $(uname -v) $(uname -m)"\033[0m"
|
||||
|
||||
# try to find the image of the current running kernel
|
||||
[ -e /boot/vmlinuz-linux ] && opt_kernel=/boot/vmlinuz-linux
|
||||
|
|
@ -307,24 +372,24 @@ if [ "$opt_live" = 1 ]; then
|
|||
opt_config=/boot/config-$(uname -r)
|
||||
fi
|
||||
else
|
||||
_echo "Checking for vulnerabilities against specified kernel"
|
||||
_info "Checking for vulnerabilities against specified kernel"
|
||||
fi
|
||||
if [ -n "$opt_kernel" ]; then
|
||||
_echo "Will use vmlinux image \033[35m$opt_kernel\033[0m"
|
||||
_verbose "Will use vmlinux image \033[35m$opt_kernel\033[0m"
|
||||
else
|
||||
_echo "Will use no vmlinux image (accuracy might be reduced)"
|
||||
_verbose "Will use no vmlinux image (accuracy might be reduced)"
|
||||
fi
|
||||
if [ -n "$dumped_config" ]; then
|
||||
_echo "Will use kconfig \033[35m/proc/config.gz\033[0m"
|
||||
_verbose "Will use kconfig \033[35m/proc/config.gz\033[0m"
|
||||
elif [ -n "$opt_config" ]; then
|
||||
_echo "Will use kconfig \033[35m$opt_config\033[0m"
|
||||
_verbose "Will use kconfig \033[35m$opt_config\033[0m"
|
||||
else
|
||||
_echo "Will use no kconfig (accuracy might be reduced)"
|
||||
_verbose "Will use no kconfig (accuracy might be reduced)"
|
||||
fi
|
||||
if [ -n "$opt_map" ]; then
|
||||
_echo "Will use System.map file \033[35m$opt_map\033[0m"
|
||||
_verbose "Will use System.map file \033[35m$opt_map\033[0m"
|
||||
else
|
||||
_echo "Will use no System.map file (accuracy might be reduced)"
|
||||
_verbose "Will use no System.map file (accuracy might be reduced)"
|
||||
fi
|
||||
|
||||
if [ -e "$opt_kernel" ]; then
|
||||
|
|
@ -340,12 +405,12 @@ if [ -z "$vmlinux" -o ! -r "$vmlinux" ]; then
|
|||
[ -z "$vmlinux_err" ] && vmlinux_err="couldn't extract your kernel from $opt_kernel"
|
||||
fi
|
||||
|
||||
_echo
|
||||
_info
|
||||
|
||||
###########
|
||||
# SPECTRE 1
|
||||
_echo "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m"
|
||||
_echo_nol "* Checking count of LFENCE opcodes in kernel: "
|
||||
_info "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m"
|
||||
_info_nol "* Checking count of LFENCE opcodes in kernel: "
|
||||
|
||||
status=0
|
||||
if [ -n "$vmlinux_err" ]; then
|
||||
|
|
@ -371,21 +436,22 @@ else
|
|||
fi
|
||||
fi
|
||||
|
||||
_echo_nol "> \033[46m\033[30mSTATUS:\033[0m "
|
||||
if ! is_cpu_vulnerable 1; then
|
||||
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
|
||||
pvulnstatus CVE-2017-5753 OK "your CPU vendor reported your CPU model as not vulnerable"
|
||||
else
|
||||
[ "$status" = 0 ] && pstatus yellow UNKNOWN
|
||||
[ "$status" = 1 ] && pstatus red 'VULNERABLE' 'heuristic to be improved when official patches become available'
|
||||
[ "$status" = 2 ] && pstatus green 'NOT VULNERABLE' 'heuristic to be improved when official patches become available'
|
||||
case "$status" in
|
||||
0) pvulnstatus CVE-2017-5753 UNK "impossible to check ${vmlinux}";;
|
||||
1) pvulnstatus CVE-2017-5753 VULN 'heuristic to be improved when official patches become available';;
|
||||
2) pvulnstatus CVE-2017-5753 OK 'heuristic to be improved when official patches become available';;
|
||||
esac
|
||||
fi
|
||||
|
||||
###########
|
||||
# VARIANT 2
|
||||
_echo
|
||||
_echo "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m"
|
||||
_echo "* Mitigation 1"
|
||||
_echo_nol "* Hardware (CPU microcode) support for mitigation: "
|
||||
_info
|
||||
_info "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m"
|
||||
_info "* Mitigation 1"
|
||||
_info_nol "* Hardware (CPU microcode) support for mitigation: "
|
||||
if [ ! -e /dev/cpu/0/msr ]; then
|
||||
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
|
||||
modprobe msr 2>/dev/null && insmod_msr=1
|
||||
|
|
@ -409,7 +475,7 @@ if [ "$insmod_msr" = 1 ]; then
|
|||
rmmod msr 2>/dev/null
|
||||
fi
|
||||
|
||||
_echo_nol "* Kernel support for IBRS: "
|
||||
_info_nol "* Kernel support for IBRS: "
|
||||
if [ "$opt_live" = 1 ]; then
|
||||
if [ ! -e /sys/kernel/debug/sched_features ]; then
|
||||
# try to mount the debugfs hierarchy ourselves and remember it to umount afterwards
|
||||
|
|
@ -437,7 +503,7 @@ if [ "$ibrs_supported" != 1 ]; then
|
|||
pstatus red NO
|
||||
fi
|
||||
|
||||
_echo_nol "* IBRS enabled for Kernel space: "
|
||||
_info_nol "* IBRS enabled for Kernel space: "
|
||||
if [ "$opt_live" = 1 ]; then
|
||||
# 0 means disabled
|
||||
# 1 is enabled only for kernel space
|
||||
|
|
@ -452,7 +518,7 @@ else
|
|||
pstatus blue N/A "not testable in offline mode"
|
||||
fi
|
||||
|
||||
_echo_nol "* IBRS enabled for User space: "
|
||||
_info_nol "* IBRS enabled for User space: "
|
||||
if [ "$opt_live" = 1 ]; then
|
||||
case "$ibrs_enabled" in
|
||||
"") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;;
|
||||
|
|
@ -464,8 +530,8 @@ else
|
|||
pstatus blue N/A "not testable in offline mode"
|
||||
fi
|
||||
|
||||
_echo "* Mitigation 2"
|
||||
_echo_nol "* Kernel compiled with retpoline option: "
|
||||
_info "* Mitigation 2"
|
||||
_info_nol "* Kernel compiled with retpoline option: "
|
||||
# We check the RETPOLINE kernel options
|
||||
if [ -r "$opt_config" ]; then
|
||||
if grep -q '^CONFIG_RETPOLINE=y' "$opt_config"; then
|
||||
|
|
@ -478,7 +544,7 @@ else
|
|||
pstatus yellow UNKNOWN "couldn't read your kernel configuration"
|
||||
fi
|
||||
|
||||
_echo_nol "* Kernel compiled with a retpoline-aware compiler: "
|
||||
_info_nol "* Kernel compiled with a retpoline-aware compiler: "
|
||||
# Now check if the compiler used to compile the kernel knows how to insert retpolines in generated asm
|
||||
# For gcc, this is -mindirect-branch=thunk-extern (detected by the kernel makefiles)
|
||||
# See gcc commit https://github.com/hjl-tools/gcc/commit/23b517d4a67c02d3ef80b6109218f2aadad7bd79
|
||||
|
|
@ -514,30 +580,29 @@ else
|
|||
pstatus yellow UNKNOWN "couldn't find your kernel image or System.map"
|
||||
fi
|
||||
|
||||
_echo_nol "> \033[46m\033[30mSTATUS:\033[0m "
|
||||
if ! is_cpu_vulnerable 2; then
|
||||
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
|
||||
pvulnstatus CVE-2017-5715 OK "your CPU vendor reported your CPU model as not vulnerable"
|
||||
elif [ "$retpoline" = 1 -a "$retpoline_compiler" = 1 ]; then
|
||||
pstatus green "NOT VULNERABLE" "retpoline mitigate the vulnerability"
|
||||
pvulnstatus CVE-2017-5715 OK "retpoline mitigate the vulnerability"
|
||||
elif [ "$opt_live" = 1 ]; then
|
||||
if [ "$ibrs_enabled" = 1 -o "$ibrs_enabled" = 2 ]; then
|
||||
pstatus green "NOT VULNERABLE" "IBRS mitigates the vulnerability"
|
||||
pvulnstatus CVE-2017-5715 OK "IBRS mitigates the vulnerability"
|
||||
else
|
||||
pstatus red VULNERABLE "IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability"
|
||||
pvulnstatus CVE-2017-5715 VULN "IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability"
|
||||
fi
|
||||
else
|
||||
if [ "$ibrs_supported" = 1 ]; then
|
||||
pstatus green "NOT VULNERABLE" "offline mode: IBRS will mitigate the vulnerability if enabled at runtime"
|
||||
pvulnstatus CVE-2017-5715 OK "offline mode: IBRS will mitigate the vulnerability if enabled at runtime"
|
||||
else
|
||||
pstatus red VULNERABLE "IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability"
|
||||
pvulnstatus CVE-2017-5715 VULN "IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability"
|
||||
fi
|
||||
fi
|
||||
|
||||
##########
|
||||
# MELTDOWN
|
||||
_echo
|
||||
_echo "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m"
|
||||
_echo_nol "* Kernel supports Page Table Isolation (PTI): "
|
||||
_info
|
||||
_info "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m"
|
||||
_info_nol "* Kernel supports Page Table Isolation (PTI): "
|
||||
kpti_support=0
|
||||
kpti_can_tell=0
|
||||
if [ -n "$opt_config" ]; then
|
||||
|
|
@ -575,7 +640,7 @@ else
|
|||
pstatus yellow UNKNOWN "couldn't read your kernel configuration nor System.map file"
|
||||
fi
|
||||
|
||||
_echo_nol "* PTI enabled and active: "
|
||||
_info_nol "* PTI enabled and active: "
|
||||
if [ "$opt_live" = 1 ]; then
|
||||
if grep ^flags /proc/cpuinfo | grep -qw pti; then
|
||||
# vanilla PTI patch sets the 'pti' flag in cpuinfo
|
||||
|
|
@ -606,23 +671,22 @@ if [ "$mounted_debugfs" = 1 ]; then
|
|||
umount /sys/kernel/debug
|
||||
fi
|
||||
|
||||
_echo_nol "> \033[46m\033[30mSTATUS:\033[0m "
|
||||
if ! is_cpu_vulnerable 3; then
|
||||
pstatus green 'NOT VULNERABLE' "your CPU vendor reported your CPU model as not vulnerable"
|
||||
pvulnstatus CVE-2017-5754 OK "your CPU vendor reported your CPU model as not vulnerable"
|
||||
elif [ "$opt_live" = 1 ]; then
|
||||
if [ "$kpti_enabled" = 1 ]; then
|
||||
pstatus green "NOT VULNERABLE" "PTI mitigates the vulnerability"
|
||||
pvulnstatus CVE-2017-5754 OK "PTI mitigates the vulnerability"
|
||||
else
|
||||
pstatus red "VULNERABLE" "PTI is needed to mitigate the vulnerability"
|
||||
pvulnstatus CVE-2017-5754 VULN "PTI is needed to mitigate the vulnerability"
|
||||
fi
|
||||
else
|
||||
if [ "$kpti_support" = 1 ]; then
|
||||
pstatus green "NOT VULNERABLE" "offline mode: PTI will mitigate the vulnerability if enabled at runtime"
|
||||
pvulnstatus CVE-2017-5754 OK "offline mode: PTI will mitigate the vulnerability if enabled at runtime"
|
||||
else
|
||||
pstatus red "VULNERABLE" "PTI is needed to mitigate the vulnerability"
|
||||
pvulnstatus CVE-2017-5754 VULN "PTI is needed to mitigate the vulnerability"
|
||||
fi
|
||||
fi
|
||||
|
||||
_echo
|
||||
_info
|
||||
|
||||
[ -n "$dumped_config" ] && rm -f "$dumped_config"
|
||||
|
|
|
|||
Loading…
Reference in New Issue