peter/spectre-meltdown-checker
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spectre-meltdown-checker
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fix echo under some shells

This commit is contained in:
Stéphane Lesimple 2018-01-07 16:00:01 +01:00
parent 0201b02313
commit 3b760822ff
1 changed files with 27 additions and 27 deletions
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54
spectre-meltdown-checker.sh
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@ -11,27 +11,27 @@ pstatus()
yellow) col="\033[103m\033[30m";; yellow) col="\033[103m\033[30m";;
*) col="";; *) col="";;
esac esac
echo -n "$col$2\033[0m" /bin/echo -ne "$col$2\033[0m"
[ -n "$3" ] && echo -n " ($3)" [ -n "$3" ] && /bin/echo -n " ($3)"
echo /bin/echo
} }
echo "Spectre and Meltdown mitigation detection tool v$VERSION" /bin/echo "Spectre and Meltdown mitigation detection tool v$VERSION"
echo /bin/echo
# SPECTRE 1 # SPECTRE 1
echo "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m" /bin/echo -e "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m"
echo -n "* Kernel recompiled with LFENCE opcode insertion: " /bin/echo -n "* Kernel recompiled with LFENCE opcode insertion: "
pstatus yellow UNKNOWN "check not yet implemented" pstatus yellow UNKNOWN "check not yet implemented"
echo -n "> \033[46m\033[30mSTATUS:\033[0m " /bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m "
pstatus yellow UNKNOWN "not implemented, but real answer is most probably VULNERABLE at this stage" pstatus yellow UNKNOWN "not implemented, but real answer is most probably VULNERABLE at this stage"
# VARIANT 2 # VARIANT 2
echo /bin/echo
echo "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m" /bin/echo -e "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m"
echo "* Mitigation 1" /bin/echo "* Mitigation 1"
echo -n "* Hardware (CPU microcode) support for mitigation: " /bin/echo -n "* Hardware (CPU microcode) support for mitigation: "
if [ ! -e /dev/cpu/0/msr ]; then if [ ! -e /dev/cpu/0/msr ]; then
modprobe msr 2>/dev/null && insmod_msr=1 modprobe msr 2>/dev/null && insmod_msr=1
fi fi
@ -45,14 +45,14 @@ else
pstatus red NO pstatus red NO
fi fi
#dd if=/dev/cpu/0/msr of=/dev/null bs=1 count=8 skip=73 2>/dev/null #dd if=/dev/cpu/0/msr of=/dev/null bs=1 count=8 skip=73 2>/dev/null
#echo $? #/bin/echo $?
fi fi
if [ "$insmod_msr" = 1 ]; then if [ "$insmod_msr" = 1 ]; then
rmmod msr 2>/dev/null rmmod msr 2>/dev/null
fi fi
echo -n "* Kernel support for IBRS: " /bin/echo -n "* Kernel support for IBRS: "
if [ -e /sys/kernel/debug/sched_features ]; then if [ -e /sys/kernel/debug/sched_features ]; then
mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null && mounted_debugfs=1 mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null && mounted_debugfs=1
fi fi
@ -64,7 +64,7 @@ else
fi fi
ibrs_enabled=$(cat /sys/kernel/debug/ibrs_enabled 2>/dev/null) ibrs_enabled=$(cat /sys/kernel/debug/ibrs_enabled 2>/dev/null)
echo -n "* IBRS enabled for Kernel space: " /bin/echo -n "* IBRS enabled for Kernel space: "
case "$ibrs_enabled" in case "$ibrs_enabled" in
"") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;; "") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;;
0) pstatus red NO;; 0) pstatus red NO;;
@ -72,7 +72,7 @@ case "$ibrs_enabled" in
*) pstatus yellow UNKNOWN;; *) pstatus yellow UNKNOWN;;
esac esac
echo -n "* IBRS enabled for User space: " /bin/echo -n "* IBRS enabled for User space: "
case "$ibrs_enabled" in case "$ibrs_enabled" in
"") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;; "") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;;
0 | 1) pstatus red NO;; 0 | 1) pstatus red NO;;
@ -84,11 +84,11 @@ if [ "$mounted_debugfs" = 1 ]; then
umount /sys/kernel/debug umount /sys/kernel/debug
fi fi
echo "* Mitigation 2" /bin/echo "* Mitigation 2"
echo -n "* Kernel recompiled with retpoline: " /bin/echo -n "* Kernel recompiled with retpoline: "
pstatus yellow UNKNOWN "check not yet implemented" pstatus yellow UNKNOWN "check not yet implemented"
echo -n "> \033[46m\033[30mSTATUS:\033[0m " /bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m "
if grep -q AMD /proc/cpuinfo; then if grep -q AMD /proc/cpuinfo; then
pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor" pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor"
elif [ "$ibrs_enabled" = 1 -o "$ibrs_enabled" = 2 ]; then elif [ "$ibrs_enabled" = 1 -o "$ibrs_enabled" = 2 ]; then
@ -98,9 +98,9 @@ else
fi fi
# MELTDOWN # MELTDOWN
echo /bin/echo
echo "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m" /bin/echo -e "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m"
echo -n "* Kernel supports Page Table Isolation (PTI): " /bin/echo -n "* Kernel supports Page Table Isolation (PTI): "
if [ -e /proc/config.gz ]; then if [ -e /proc/config.gz ]; then
if zgrep -q '^CONFIG_PAGE_TABLE_ISOLATION=y' /proc/config.gz; then if zgrep -q '^CONFIG_PAGE_TABLE_ISOLATION=y' /proc/config.gz; then
pstatus green YES pstatus green YES
@ -126,7 +126,7 @@ else
pstatus yellow UNKNOWN pstatus yellow UNKNOWN
fi fi
echo -n "* PTI enabled and active: " /bin/echo -n "* PTI enabled and active: "
if grep ^flags /proc/cpuinfo | grep -qw pti; then if grep ^flags /proc/cpuinfo | grep -qw pti; then
pstatus green YES pstatus green YES
kpti_enabled=1 kpti_enabled=1
@ -137,7 +137,7 @@ else
pstatus red NO pstatus red NO
fi fi
echo -n "> \033[46m\033[30mSTATUS:\033[0m " /bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m "
if grep -q AMD /proc/cpuinfo; then if grep -q AMD /proc/cpuinfo; then
pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor" pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor"
elif [ "$kpti_enabled" = 1 ]; then elif [ "$kpti_enabled" = 1 ]; then
@ -147,10 +147,10 @@ else
fi fi
echo /bin/echo
if [ "$USER" != root ]; then if [ "$USER" != root ]; then
echo "Note that you should launch this script with root privileges to get accurate information" /bin/echo "Note that you should launch this script with root privileges to get accurate information"
echo "You can try the following command: sudo $0" /bin/echo "You can try the following command: sudo $0"
fi fi