diff options
| -rwxr-xr-x | spectre-meltdown-checker.sh | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh index c5cc444..22bab38 100755 --- a/spectre-meltdown-checker.sh +++ b/spectre-meltdown-checker.sh @@ -11,27 +11,27 @@ pstatus() yellow) col="\033[103m\033[30m";; *) col="";; esac - echo -n "$col$2\033[0m" - [ -n "$3" ] && echo -n " ($3)" - echo + /bin/echo -ne "$col$2\033[0m" + [ -n "$3" ] && /bin/echo -n " ($3)" + /bin/echo } -echo "Spectre and Meltdown mitigation detection tool v$VERSION" -echo +/bin/echo "Spectre and Meltdown mitigation detection tool v$VERSION" +/bin/echo # SPECTRE 1 -echo "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m" -echo -n "* Kernel recompiled with LFENCE opcode insertion: " +/bin/echo -e "\033[1;34mCVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'\033[0m" +/bin/echo -n "* Kernel recompiled with LFENCE opcode insertion: " 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" # VARIANT 2 -echo -echo "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m" -echo "* Mitigation 1" -echo -n "* Hardware (CPU microcode) support for mitigation: " +/bin/echo +/bin/echo -e "\033[1;34mCVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'\033[0m" +/bin/echo "* Mitigation 1" +/bin/echo -n "* Hardware (CPU microcode) support for mitigation: " if [ ! -e /dev/cpu/0/msr ]; then modprobe msr 2>/dev/null && insmod_msr=1 fi @@ -45,14 +45,14 @@ else pstatus red NO fi #dd if=/dev/cpu/0/msr of=/dev/null bs=1 count=8 skip=73 2>/dev/null - #echo $? + #/bin/echo $? fi if [ "$insmod_msr" = 1 ]; then rmmod msr 2>/dev/null fi -echo -n "* Kernel support for IBRS: " +/bin/echo -n "* Kernel support for IBRS: " if [ -e /sys/kernel/debug/sched_features ]; then mount -t debugfs debugfs /sys/kernel/debug 2>/dev/null && mounted_debugfs=1 fi @@ -64,7 +64,7 @@ else fi 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 "") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;; 0) pstatus red NO;; @@ -72,7 +72,7 @@ case "$ibrs_enabled" in *) pstatus yellow UNKNOWN;; esac -echo -n "* IBRS enabled for User space: " +/bin/echo -n "* IBRS enabled for User space: " case "$ibrs_enabled" in "") [ "$ibrs_supported" = 1 ] && pstatus yellow UNKNOWN || pstatus red NO;; 0 | 1) pstatus red NO;; @@ -84,11 +84,11 @@ if [ "$mounted_debugfs" = 1 ]; then umount /sys/kernel/debug fi -echo "* Mitigation 2" -echo -n "* Kernel recompiled with retpoline: " +/bin/echo "* Mitigation 2" +/bin/echo -n "* Kernel recompiled with retpoline: " pstatus yellow UNKNOWN "check not yet implemented" -echo -n "> \033[46m\033[30mSTATUS:\033[0m " +/bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m " if grep -q AMD /proc/cpuinfo; then pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor" elif [ "$ibrs_enabled" = 1 -o "$ibrs_enabled" = 2 ]; then @@ -98,9 +98,9 @@ else fi # MELTDOWN -echo -echo "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m" -echo -n "* Kernel supports Page Table Isolation (PTI): " +/bin/echo +/bin/echo -e "\033[1;34mCVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'\033[0m" +/bin/echo -n "* Kernel supports Page Table Isolation (PTI): " if [ -e /proc/config.gz ]; then if zgrep -q '^CONFIG_PAGE_TABLE_ISOLATION=y' /proc/config.gz; then pstatus green YES @@ -126,7 +126,7 @@ else pstatus yellow UNKNOWN fi -echo -n "* PTI enabled and active: " +/bin/echo -n "* PTI enabled and active: " if grep ^flags /proc/cpuinfo | grep -qw pti; then pstatus green YES kpti_enabled=1 @@ -137,7 +137,7 @@ else pstatus red NO fi -echo -n "> \033[46m\033[30mSTATUS:\033[0m " +/bin/echo -ne "> \033[46m\033[30mSTATUS:\033[0m " if grep -q AMD /proc/cpuinfo; then pstatus green "NOT VULNERABLE" "your CPU is not vulnerable as per the vendor" elif [ "$kpti_enabled" = 1 ]; then @@ -147,10 +147,10 @@ else fi -echo +/bin/echo if [ "$USER" != root ]; then - 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 "Note that you should launch this script with root privileges to get accurate information" + /bin/echo "You can try the following command: sudo $0" fi |