made public in 2018. Script is available on `Spectre & Meltdown Checker Github
<https://github.com/speed47/spectre-meltdown-checker>`_.
-- CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
-- CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
-- CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
-- CVE-2018-3640 [rogue system register read] aka 'Variant 3a'
-- CVE-2018-3639 [speculative store bypass] aka 'Variant 4'
-- CVE-2018-3615 [L1 terminal fault] aka 'Foreshadow (SGX)'
-- CVE-2018-3620 [L1 terminal fault] aka 'Foreshadow-NG (OS)'
-- CVE-2018-3646 [L1 terminal fault] aka 'Foreshadow-NG (VMM)'
-
::
- $ sudo ./spectre-meltdown-checker.sh --no-color
-
- Spectre and Meltdown mitigation detection tool v0.40
-
- Checking for vulnerabilities on current system
- Kernel is Linux 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64
- CPU is Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz
-
- Hardware check
- * Hardware support (CPU microcode) for mitigation techniques
- * Indirect Branch Restricted Speculation (IBRS)
- * SPEC_CTRL MSR is available: YES
- * CPU indicates IBRS capability: YES (SPEC_CTRL feature bit)
- * Indirect Branch Prediction Barrier (IBPB)
- * PRED_CMD MSR is available: YES
- * CPU indicates IBPB capability: YES (SPEC_CTRL feature bit)
- * Single Thread Indirect Branch Predictors (STIBP)
- * SPEC_CTRL MSR is available: YES
- * CPU indicates STIBP capability: YES (Intel STIBP feature bit)
- * Speculative Store Bypass Disable (SSBD)
- * CPU indicates SSBD capability: YES (Intel SSBD)
- * L1 data cache invalidation
- * FLUSH_CMD MSR is available: YES
- * CPU indicates L1D flush capability: YES (L1D flush feature bit)
- * Enhanced IBRS (IBRS_ALL)
- * CPU indicates ARCH_CAPABILITIES MSR availability: NO
- * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
- * CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO): NO
- * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): NO
- * CPU/Hypervisor indicates L1D flushing is not necessary on this system: NO
- * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
- * CPU supports Software Guard Extensions (SGX): NO
- * CPU microcode is known to cause stability problems: NO (model 0x3f family 0x6 stepping 0x2 ucode 0x3d cpuid 0x306f2)
- * CPU microcode is the latest known available version: YES (latest version is 0x3d dated 2018/04/20 according to builtin MCExtractor DB v84 - 2018/09/27)
- * CPU vulnerability to the speculative execution attack variants
- * Vulnerable to CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
- * Vulnerable to CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
- * Vulnerable to CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): YES
- * Vulnerable to CVE-2018-3640 (Variant 3a, rogue system register read): YES
- * Vulnerable to CVE-2018-3639 (Variant 4, speculative store bypass): YES
- * Vulnerable to CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
- * Vulnerable to CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
- * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
-
- CVE-2017-5753 aka 'Spectre Variant 1, bounds check bypass'
- * Mitigated according to the /sys interface: YES (Mitigation: __user pointer sanitization)
- * Kernel has array_index_mask_nospec: YES (1 occurrence(s) found of x86 64 bits array_index_mask_nospec())
- * Kernel has the Red Hat/Ubuntu patch: NO
- * Kernel has mask_nospec64 (arm64): NO
- > STATUS: NOT VULNERABLE (Mitigation: __user pointer sanitization)
-
- CVE-2017-5715 aka 'Spectre Variant 2, branch target injection'
- * Mitigated according to the /sys interface: YES (Mitigation: Full generic retpoline, IBPB, IBRS_FW)
- * Mitigation 1
- * Kernel is compiled with IBRS support: YES
- * IBRS enabled and active: YES (for kernel and firmware code)
- * Kernel is compiled with IBPB support: YES
- * IBPB enabled and active: YES
- * Mitigation 2
- * Kernel has branch predictor hardening (arm): NO
- * Kernel compiled with retpoline option: YES
- * Kernel compiled with a retpoline-aware compiler: YES (kernel reports full retpoline compilation)
- > STATUS: NOT VULNERABLE (Full retpoline + IBPB are mitigating the vulnerability)
-
- CVE-2017-5754 aka 'Variant 3, Meltdown, rogue data cache load'
- * Mitigated according to the /sys interface: YES (Mitigation: PTI)
- * Kernel supports Page Table Isolation (PTI): YES
- * PTI enabled and active: YES
- * Reduced performance impact of PTI: YES (CPU supports INVPCID, performance impact of PTI will be greatly reduced)
- * Running as a Xen PV DomU: NO
- > STATUS: NOT VULNERABLE (Mitigation: PTI)
-
- CVE-2018-3640 aka 'Variant 3a, rogue system register read'
- * CPU microcode mitigates the vulnerability: YES
- > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
-
- CVE-2018-3639 aka 'Variant 4, speculative store bypass'
- * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
- * Kernel supports speculation store bypass: YES (found in /proc/self/status)
- > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
-
- CVE-2018-3615 aka 'Foreshadow (SGX), L1 terminal fault'
- * CPU microcode mitigates the vulnerability: N/A
- > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
-
- CVE-2018-3620 aka 'Foreshadow-NG (OS), L1 terminal fault'
- * Mitigated according to the /sys interface: YES (Mitigation: PTE Inversion)
- * Kernel supports PTE inversion: YES (found in kernel image)
- * PTE inversion enabled and active: YES
- > STATUS: NOT VULNERABLE (Mitigation: PTE Inversion)
-
- CVE-2018-3646 aka 'Foreshadow-NG (VMM), L1 terminal fault'
- * Information from the /sys interface: VMX: conditional cache flushes, SMT disabled
- * This system is a host running an hypervisor: NO
- * Mitigation 1 (KVM)
- * EPT is disabled: NO
- * Mitigation 2
- * L1D flush is supported by kernel: YES (found flush_l1d in /proc/cpuinfo)
- * L1D flush enabled: YES (conditional flushes)
- * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
- * Hyper-Threading (SMT) is enabled: NO
- > STATUS: NOT VULNERABLE (this system is not running an hypervisor)
-
- > SUMMARY: CVE-2017-5753:OK CVE-2017-5715:OK CVE-2017-5754:OK CVE-2018-3640:OK CVE-2018-3639:OK CVE-2018-3615:OK CVE-2018-3620:OK CVE-2018-3646:OK
-
- Need more detailed information about mitigation options? Use --explain
- A false sense of security is worse than no security at all, see --disclaimer
+ Spectre and Meltdown mitigation detection tool v0.43
+
+ awk: cannot open bash (No such file or directory)
+ Checking for vulnerabilities on current system
+ Kernel is Linux 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019 x86_64
+ CPU is Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz
+
+ Hardware check
+ * Hardware support (CPU microcode) for mitigation techniques
+ * Indirect Branch Restricted Speculation (IBRS)
+ * SPEC_CTRL MSR is available: YES
+ * CPU indicates IBRS capability: YES (SPEC_CTRL feature bit)
+ * Indirect Branch Prediction Barrier (IBPB)
+ * PRED_CMD MSR is available: YES
+ * CPU indicates IBPB capability: YES (SPEC_CTRL feature bit)
+ * Single Thread Indirect Branch Predictors (STIBP)
+ * SPEC_CTRL MSR is available: YES
+ * CPU indicates STIBP capability: YES (Intel STIBP feature bit)
+ * Speculative Store Bypass Disable (SSBD)
+ * CPU indicates SSBD capability: YES (Intel SSBD)
+ * L1 data cache invalidation
+ * FLUSH_CMD MSR is available: YES
+ * CPU indicates L1D flush capability: YES (L1D flush feature bit)
+ * Microarchitectural Data Sampling
+ * VERW instruction is available: YES (MD_CLEAR feature bit)
+ * Enhanced IBRS (IBRS_ALL)
+ * CPU indicates ARCH_CAPABILITIES MSR availability: NO
+ * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
+ * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO): NO
+ * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): NO
+ * CPU/Hypervisor indicates L1D flushing is not necessary on this system: NO
+ * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
+ * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): NO
+ * CPU explicitly indicates not being vulnerable to TSX Asynchronous Abort (TAA_NO): NO
+ * CPU explicitly indicates not being vulnerable to iTLB Multihit (PSCHANGE_MSC_NO): NO
+ * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): NO
+ * CPU supports Transactional Synchronization Extensions (TSX): NO
+ * CPU supports Software Guard Extensions (SGX): NO
+ * CPU microcode is known to cause stability problems: NO (model 0x3f family 0x6 stepping 0x2 ucode 0x43 cpuid 0x306f2)
+ * CPU microcode is the latest known available version: awk: cannot open bash (No such file or directory)
+ UNKNOWN (latest microcode version for your CPU model is unknown)
+ * CPU vulnerability to the speculative execution attack variants
+ * Vulnerable to CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
+ * Vulnerable to CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
+ * Vulnerable to CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): YES
+ * Vulnerable to CVE-2018-3640 (Variant 3a, rogue system register read): YES
+ * Vulnerable to CVE-2018-3639 (Variant 4, speculative store bypass): YES
+ * Vulnerable to CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
+ * Vulnerable to CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
+ * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
+ * Vulnerable to CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): YES
+ * Vulnerable to CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): YES
+ * Vulnerable to CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): YES
+ * Vulnerable to CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): YES
+ * Vulnerable to CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
+ * Vulnerable to CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
+
+ CVE-2017-5753 aka Spectre Variant 1, bounds check bypass
+ * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
+ * Kernel has array_index_mask_nospec: YES (1 occurrence(s) found of x86 64 bits array_index_mask_nospec())
+ * Kernel has the Red Hat/Ubuntu patch: NO
+ * Kernel has mask_nospec64 (arm64): NO
+ > STATUS: NOT VULNERABLE (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
+
+ CVE-2017-5715 aka Spectre Variant 2, branch target injection
+ * Mitigated according to the /sys interface: YES (Mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, RSB filling)
+ * Mitigation 1
+ * Kernel is compiled with IBRS support: YES
+ * IBRS enabled and active: YES (for firmware code only)
+ * Kernel is compiled with IBPB support: YES
+ * IBPB enabled and active: YES
+ * Mitigation 2
+ * Kernel has branch predictor hardening (arm): NO
+ * Kernel compiled with retpoline option: YES
+ * Kernel compiled with a retpoline-aware compiler: YES (kernel reports full retpoline compilation)
+ > STATUS: NOT VULNERABLE (Full retpoline + IBPB are mitigating the vulnerability)
+
+ CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
+ * Mitigated according to the /sys interface: YES (Mitigation: PTI)
+ * Kernel supports Page Table Isolation (PTI): YES
+ * PTI enabled and active: YES
+ * Reduced performance impact of PTI: YES (CPU supports INVPCID, performance impact of PTI will be greatly reduced)
+ * Running as a Xen PV DomU: NO
+ > STATUS: NOT VULNERABLE (Mitigation: PTI)
+
+ CVE-2018-3640 aka Variant 3a, rogue system register read
+ * CPU microcode mitigates the vulnerability: YES
+ > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
+
+ CVE-2018-3639 aka Variant 4, speculative store bypass
+ * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
+ * Kernel supports disabling speculative store bypass (SSB): YES (found in /proc/self/status)
+ * SSB mitigation is enabled and active: YES (per-thread through prctl)
+ * SSB mitigation currently active for selected processes: YES (systemd-journald systemd-logind systemd-networkd systemd-resolved systemd-timesyncd systemd-udevd)
+ > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
+
+ CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
+ * CPU microcode mitigates the vulnerability: N/A
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
+ * Mitigated according to the /sys interface: YES (Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT disabled)
+ * Kernel supports PTE inversion: YES (found in kernel image)
+ * PTE inversion enabled and active: YES
+ > STATUS: NOT VULNERABLE (Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT disabled)
+
+ CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
+ * Information from the /sys interface: Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT disabled
+ * This system is a host running a hypervisor: NO
+ * Mitigation 1 (KVM)
+ * EPT is disabled: NO
+ * Mitigation 2
+ * L1D flush is supported by kernel: YES (found flush_l1d in /proc/cpuinfo)
+ * L1D flush enabled: YES (conditional flushes)
+ * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
+ * Hyper-Threading (SMT) is enabled: NO
+ > STATUS: NOT VULNERABLE (this system is not running a hypervisor)
+
+ CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
+ * Mitigated according to the /sys interface: YES (Mitigation: Clear CPU buffers; SMT disabled)
+ * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
+ * Kernel mitigation is enabled and active: YES
+ * SMT is either mitigated or disabled: YES
+ > STATUS: NOT VULNERABLE (Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled)
+
+ CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
+ * Mitigated according to the /sys interface: YES (Mitigation: Clear CPU buffers; SMT disabled)
+ * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
+ * Kernel mitigation is enabled and active: YES
+ * SMT is either mitigated or disabled: YES
+ > STATUS: NOT VULNERABLE (Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled)
+
+ CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
+ * Mitigated according to the /sys interface: YES (Mitigation: Clear CPU buffers; SMT disabled)
+ * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
+ * Kernel mitigation is enabled and active: YES
+ * SMT is either mitigated or disabled: YES
+ > STATUS: NOT VULNERABLE (Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled)
+
+ CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
+ * Mitigated according to the /sys interface: YES (Mitigation: Clear CPU buffers; SMT disabled)
+ * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
+ * Kernel mitigation is enabled and active: YES
+ * SMT is either mitigated or disabled: YES
+ > STATUS: NOT VULNERABLE (Your microcode and kernel are both up to date for this mitigation, and mitigation is enabled)
+
+ CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ * TAA mitigation is supported by kernel: YES (found tsx_async_abort in kernel image)
+ * TAA mitigation enabled and active: NO
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
+ * Mitigated according to the /sys interface: YES (KVM: Mitigation: Split huge pages)
+ * This system is a host running a hypervisor: NO
+ * iTLB Multihit mitigation is supported by kernel: YES (found itlb_multihit in kernel image)
+ * iTLB Multihit mitigation enabled and active: YES (KVM: Mitigation: Split huge pages)
+ > STATUS: NOT VULNERABLE (this system is not running a hypervisor)
+
+ > SUMMARY: CVE-2017-5753:OK CVE-2017-5715:OK CVE-2017-5754:OK CVE-2018-3640:OK CVE-2018-3639:OK CVE-2018-3615:OK CVE-2018-3620:OK CVE-2018-3646:OK CVE-2018-12126:OK CVE-2018-12130:OK CVE-2018-12127:OK CVE-2019-11091:OK CVE-2019-11135:OK CVE-2018-12207:OK
Code Review / csit.git / blobdiff