Spectre and Meltdown Checks
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
Following section displays the output of a running shell script to tell if
system is vulnerable against the several speculative execution CVEs that were
::
- Spectre and Meltdown mitigation detection tool v0.42
+ Spectre and Meltdown mitigation detection tool v0.44+
+
+ 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: YES
+ * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: YES
+ * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO): YES
+ * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): NO
+ * CPU/Hypervisor indicates L1D flushing is not necessary on this system: YES
+ * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
+ * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): YES
+ * 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): YES
+ * TSX_CTRL MSR indicates TSX RTM is disabled: YES
+ * TSX_CTRL MSR indicates TSX CPUID bit is cleared: YES
+ * CPU supports Transactional Synchronization Extensions (TSX): NO
+ * CPU supports Software Guard Extensions (SGX): NO
+ * CPU supports Special Register Buffer Data Sampling (SRBDS): NO
+ * CPU microcode is known to cause stability problems: NO (family 0x6 model 0x55 stepping 0x7 ucode 0x500002c cpuid 0x50657)
+ * CPU microcode is the latest known available version: NO (latest version is 0x5003102 dated 2021/03/08 according to builtin firmwares DB v191+i20210217)
+ * CPU vulnerability to the speculative execution attack variants
+ * Affected by CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
+ * Affected by CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
+ * Affected by CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
+ * Affected by CVE-2018-3640 (Variant 3a, rogue system register read): YES
+ * Affected by CVE-2018-3639 (Variant 4, speculative store bypass): YES
+ * Affected by CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
+ * Affected by CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
+ * Affected by CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
+ * Affected by CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
+ * Affected by CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
+ * Affected by CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
+ * Affected by CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
+ * Affected by CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
+ * Affected by CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
+ * Affected by CVE-2020-0543 (Special Register Buffer Data Sampling (SRBDS)): NO
+
+ 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)
+ > STATUS: UNKNOWN (/sys vulnerability interface use forced, but it s not available!)
+
+ CVE-2017-5715 aka Spectre Variant 2, branch target injection
+ * Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
+ > STATUS: VULNERABLE (IBRS+IBPB or retpoline+IBPB+RSB filling, is needed to mitigate the vulnerability)
+
+ CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
+ * Mitigated according to the /sys interface: YES (Not affected)
+ * Running as a Xen PV DomU: NO
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ 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)
+ > 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 (Not affected)
+ > STATUS: NOT VULNERABLE (Not affected)
+
+ CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
+ * Information from the /sys interface: Not affected
+ > STATUS: NOT VULNERABLE (your kernel reported your CPU model as not vulnerable)
+
+ CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
+ * Mitigated according to the /sys interface: YES (Mitigation: TSX disabled)
+ > 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)
+ > STATUS: NOT VULNERABLE (KVM: Mitigation: Split huge pages)
+
+ CVE-2020-0543 aka Special Register Buffer Data Sampling (SRBDS)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+
+ > SUMMARY: CVE-2017-5753:?? CVE-2017-5715:KO 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 CVE-2020-0543:OK
+
+::
+
+ Spectre and Meltdown mitigation detection tool v0.44+
Checking for vulnerabilities on current system
- Kernel is Linux 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 16:55:30 UTC 2019 x86_64
+ Kernel is Linux 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64
CPU is Intel(R) Xeon(R) Gold 6252N CPU @ 2.30GHz
Hardware check
* L1 data cache invalidation
* FLUSH_CMD MSR is available: YES
* CPU indicates L1D flush capability: YES (L1D flush feature bit)
- * Microarchitecture Data Sampling
+ * Microarchitectural Data Sampling
* VERW instruction is available: YES (MD_CLEAR feature bit)
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: YES
* CPU/Hypervisor indicates L1D flushing is not necessary on this system: YES
* Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
* CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): YES
+ * 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): YES
+ * TSX_CTRL MSR indicates TSX RTM is disabled: YES
+ * TSX_CTRL MSR indicates TSX CPUID bit is cleared: YES
+ * CPU supports Transactional Synchronization Extensions (TSX): NO
* CPU supports Software Guard Extensions (SGX): NO
- * CPU microcode is known to cause stability problems: NO (model 0x55 family 0x6 stepping 0x7 ucode 0x5000021 cpuid 0x50657)
- * CPU microcode is the latest known available version: awk: fatal: cannot open file `bash' for reading (No file or directory)
- UNKNOWN (latest microcode version for your CPU model is unknown)
+ * CPU supports Special Register Buffer Data Sampling (SRBDS): NO
+ * CPU microcode is known to cause stability problems: NO (family 0x6 model 0x55 stepping 0x7 ucode 0x500002c cpuid 0x50657)
+ * CPU microcode is the latest known available version: NO (latest version is 0x5003102 dated 2021/03/08 according to builtin firmwares DB v191+i20210217)
* 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): NO
- * 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): NO
- * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): NO
- * Vulnerable to CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
- * Vulnerable to CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
- * Vulnerable to CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
- * Vulnerable to CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
-
- CVE-2017-5753 aka 'Spectre Variant 1, bounds check bypass'
- * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer saniation)
- * 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 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'
+ * Affected by CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
+ * Affected by CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
+ * Affected by CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
+ * Affected by CVE-2018-3640 (Variant 3a, rogue system register read): YES
+ * Affected by CVE-2018-3639 (Variant 4, speculative store bypass): YES
+ * Affected by CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
+ * Affected by CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
+ * Affected by CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
+ * Affected by CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
+ * Affected by CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
+ * Affected by CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
+ * Affected by CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
+ * Affected by CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
+ * Affected by CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
+ * Affected by CVE-2020-0543 (Special Register Buffer Data Sampling (SRBDS)): NO
+
+ 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)
+ > STATUS: UNKNOWN (/sys vulnerability interface use forced, but its not available!)
+
+ CVE-2017-5715 aka Spectre Variant 2, branch target injection
* Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
- * Mitigation 1
- * Kernel is compiled with IBRS support: YES
- * IBRS enabled and active: YES (Enhanced flavor, performance impact will be greatly reduced)
- * 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 supports RSB filling: YES
- > STATUS: NOT VULNERABLE (Enhanced IBRS + IBPB are mitigating the vulnerability)
-
- CVE-2017-5754 aka 'Variant 3, Meltdown, rogue data cache load'
+ > STATUS: VULNERABLE (IBRS+IBPB or retpoline+IBPB+RSB filling, is needed to mitigate the vulnerability)
+
+ CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports Page Table Isolation (PTI): YES
- * PTI enabled and active: NO
- * 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 (your CPU vendor reported your CPU model as not vulnerable)
- CVE-2018-3640 aka 'Variant 3a, rogue system register read'
+ 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'
+ 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 ((deleted) 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'
+ 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'
+ CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports PTE inversion: YES (found in kernel image)
- * PTE inversion enabled and active: NO
- > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+ > STATUS: NOT VULNERABLE (Not affected)
- CVE-2018-3646 aka 'Foreshadow-NG (VMM), L1 terminal fault'
+ CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
* Information from the /sys interface: Not affected
- * 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: NO
- * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
-
- * Hyper-Threading (SMT) is enabled: YES
- > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+ > STATUS: NOT VULNERABLE (your kernel reported your CPU model as not vulnerable)
- CVE-2018-12126 aka 'Fallout, microarchitectural store buffer data sampling (MSBDS)'
+ CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
- * Kernel mitigation is enabled and active: NO
- * SMT is either mitigated or disabled: NO
> STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
- CVE-2018-12130 aka 'ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)'
+ CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
- * Kernel mitigation is enabled and active: NO
- * SMT is either mitigated or disabled: NO
> STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
- CVE-2018-12127 aka 'RIDL, microarchitectural load port data sampling (MLPDS)'
+ CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
- * Kernel mitigation is enabled and active: NO
- * SMT is either mitigated or disabled: NO
> STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
- CVE-2019-11091 aka 'RIDL, microarchitectural data sampling uncacheable memory (MDSUM)'
+ CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
* Mitigated according to the /sys interface: YES (Not affected)
- * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
- * Kernel mitigation is enabled and active: NO
- * SMT is either mitigated or disabled: NO
> STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
- > 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 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
+ * Mitigated according to the /sys interface: YES (Mitigation: TSX disabled)
+ > 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)
+ > STATUS: NOT VULNERABLE (KVM: Mitigation: Split huge pages)
+
+ CVE-2020-0543 aka Special Register Buffer Data Sampling (SRBDS)
+ * Mitigated according to the /sys interface: YES (Not affected)
+ > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
+ > SUMMARY: CVE-2017-5753:?? CVE-2017-5715:KO 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 CVE-2020-0543:OK
Code Review / csit.git / blobdiff