1 Spectre and Meltdown Checks
2 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
4 Following section displays the output of a running shell script to tell if
5 system is vulnerable against the several speculative execution CVEs that were
6 made public in 2018. Script is available on `Spectre & Meltdown Checker Github
7 <https://github.com/speed47/spectre-meltdown-checker>`_.
11 Spectre and Meltdown mitigation detection tool v0.45
13 Checking for vulnerabilities on current system
14 Kernel is Linux 5.15.0-46-generic #49-Ubuntu SMP Thu Aug 4 18:03:25 UTC 2022 x86_64
15 CPU is Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz
18 * Hardware support (CPU microcode) for mitigation techniques
19 * Indirect Branch Restricted Speculation (IBRS)
20 * SPEC_CTRL MSR is available: YES
21 * CPU indicates IBRS capability: YES (SPEC_CTRL feature bit)
22 * Indirect Branch Prediction Barrier (IBPB)
23 * CPU indicates IBPB capability: YES (SPEC_CTRL feature bit)
24 * Single Thread Indirect Branch Predictors (STIBP)
25 * SPEC_CTRL MSR is available: YES
26 * CPU indicates STIBP capability: YES (Intel STIBP feature bit)
27 * Speculative Store Bypass Disable (SSBD)
28 * CPU indicates SSBD capability: YES (Intel SSBD)
29 * L1 data cache invalidation
30 * CPU indicates L1D flush capability: YES (L1D flush feature bit)
31 * Microarchitectural Data Sampling
32 * VERW instruction is available: YES (MD_CLEAR feature bit)
33 * Indirect Branch Predictor Controls
34 * Indirect Predictor Disable feature is available: NO
35 * Bottomless RSB Disable feature is available: NO
36 * BHB-Focused Indirect Predictor Disable feature is available: NO
37 * Enhanced IBRS (IBRS_ALL)
38 * CPU indicates ARCH_CAPABILITIES MSR availability: YES
39 * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: YES
40 * CPU explicitly indicates not being affected by Meltdown/L1TF (RDCL_NO): YES
41 * CPU explicitly indicates not being affected by Variant 4 (SSB_NO): NO
42 * CPU/Hypervisor indicates L1D flushing is not necessary on this system: YES
43 * Hypervisor indicates host CPU might be affected by RSB underflow (RSBA): NO
44 * CPU explicitly indicates not being affected by Microarchitectural Data Sampling (MDS_NO): YES
45 * CPU explicitly indicates not being affected by TSX Asynchronous Abort (TAA_NO): YES
46 * CPU explicitly indicates not being affected by iTLB Multihit (PSCHANGE_MSC_NO): YES
47 * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): YES
48 * TSX_CTRL MSR indicates TSX RTM is disabled: YES
49 * TSX_CTRL MSR indicates TSX CPUID bit is cleared: YES
50 * CPU supports Transactional Synchronization Extensions (TSX): NO
51 * CPU supports Software Guard Extensions (SGX): YES
52 * CPU supports Special Register Buffer Data Sampling (SRBDS): NO
53 * CPU microcode is known to cause stability problems: NO (family 0x6 model 0x6a stepping 0x6 ucode 0xd000280 cpuid 0x606a6)
54 * CPU microcode is the latest known available version: NO (latest version is 0xd000331 dated 2021/12/03 according to builtin firmwares DB v222+i20220208)
55 * CPU vulnerability to the speculative execution attack variants
56 * Affected by CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
57 * Affected by CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
58 * Affected by CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
59 * Affected by CVE-2018-3640 (Variant 3a, rogue system register read): YES
60 * Affected by CVE-2018-3639 (Variant 4, speculative store bypass): YES
61 * Affected by CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): YES
62 * Affected by CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
63 * Affected by CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
64 * Affected by CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
65 * Affected by CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
66 * Affected by CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
67 * Affected by CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
68 * Affected by CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
69 * Affected by CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
70 * Affected by CVE-2020-0543 (Special Register Buffer Data Sampling (SRBDS)): NO
72 CVE-2017-5753 aka Spectre Variant 1, bounds check bypass
73 * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
74 > STATUS: UNKNOWN (/sys vulnerability interface use forced, but its not available!)
76 CVE-2017-5715 aka Spectre Variant 2, branch target injection
77 * Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
78 > STATUS: VULNERABLE (IBRS+IBPB or retpoline+IBPB is needed to mitigate the vulnerability)
80 CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
81 * Mitigated according to the /sys interface: YES (Not affected)
82 * Running as a Xen PV DomU: NO
83 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
85 CVE-2018-3640 aka Variant 3a, rogue system register read
86 * CPU microcode mitigates the vulnerability: YES
87 > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
89 CVE-2018-3639 aka Variant 4, speculative store bypass
90 * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
91 > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
93 CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
94 * CPU microcode mitigates the vulnerability: YES
95 > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
97 CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
98 * Mitigated according to the /sys interface: YES (Not affected)
99 > STATUS: NOT VULNERABLE (Not affected)
101 CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
102 * Information from the /sys interface: Not affected
103 > STATUS: NOT VULNERABLE (your kernel reported your CPU model as not affected)
105 CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
106 * Mitigated according to the /sys interface: YES (Not affected)
107 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
109 CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
110 * Mitigated according to the /sys interface: YES (Not affected)
111 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
113 CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
114 * Mitigated according to the /sys interface: YES (Not affected)
115 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
117 CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
118 * Mitigated according to the /sys interface: YES (Not affected)
119 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
121 CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
122 * Mitigated according to the /sys interface: YES (Not affected)
123 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
125 CVE-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
126 * Mitigated according to the /sys interface: YES (Not affected)
127 > STATUS: NOT VULNERABLE (Not affected)
129 CVE-2020-0543 aka Special Register Buffer Data Sampling (SRBDS)
130 * Mitigated according to the /sys interface: YES (Not affected)
131 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
133 > 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