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 AMD EPYC 7532 32-Core Processor
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 (IBRS_SUPPORT feature bit)
22 * CPU indicates preferring IBRS always-on: NO
23 * CPU indicates preferring IBRS over retpoline: YES
24 * Indirect Branch Prediction Barrier (IBPB)
25 * CPU indicates IBPB capability: YES (IBPB_SUPPORT feature bit)
26 * Single Thread Indirect Branch Predictors (STIBP)
27 * SPEC_CTRL MSR is available: YES
28 * CPU indicates STIBP capability: YES (AMD STIBP feature bit)
29 * CPU indicates preferring STIBP always-on: NO
30 * Speculative Store Bypass Disable (SSBD)
31 * CPU indicates SSBD capability: YES (AMD SSBD in SPEC_CTRL)
32 * L1 data cache invalidation
33 * CPU indicates L1D flush capability: NO
34 * CPU supports Transactional Synchronization Extensions (TSX): NO
35 * CPU supports Software Guard Extensions (SGX): NO
36 * CPU supports Special Register Buffer Data Sampling (SRBDS): NO
37 * CPU microcode is known to cause stability problems: NO (family 0x17 model 0x31 stepping 0x0 ucode 0x8301038 cpuid 0x830f10)
38 * CPU microcode is the latest known available version: NO (latest version is 0x8301052 dated 2021/11/11 according to builtin firmwares DB v222+i20220208)
39 * CPU vulnerability to the speculative execution attack variants
40 * Affected by CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
41 * Affected by CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
42 * Affected by CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
43 * Affected by CVE-2018-3640 (Variant 3a, rogue system register read): NO
44 * Affected by CVE-2018-3639 (Variant 4, speculative store bypass): YES
45 * Affected by CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
46 * Affected by CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): NO
47 * Affected by CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): NO
48 * Affected by CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
49 * Affected by CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
50 * Affected by CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
51 * Affected by CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
52 * Affected by CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
53 * Affected by CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): NO
54 * Affected by CVE-2020-0543 (Special Register Buffer Data Sampling (SRBDS)): NO
56 CVE-2017-5753 aka Spectre Variant 1, bounds check bypass
57 * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
58 > STATUS: UNKNOWN (/sys vulnerability interface use forced, but its not available!)
60 CVE-2017-5715 aka Spectre Variant 2, branch target injection
61 * Mitigated according to the /sys interface: YES (Mitigation: Retpolines, IBPB: conditional, IBRS_FW, STIBP: always-on, RSB filling)
62 > STATUS: VULNERABLE (retpoline+IBPB is needed to mitigate the vulnerability)
64 CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
65 * Mitigated according to the /sys interface: YES (Not affected)
66 * Running as a Xen PV DomU: NO
67 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
69 CVE-2018-3640 aka Variant 3a, rogue system register read
70 * CPU microcode mitigates the vulnerability: YES
71 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
73 CVE-2018-3639 aka Variant 4, speculative store bypass
74 * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
75 > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
77 CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
78 * CPU microcode mitigates the vulnerability: N/A
79 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
81 CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
82 * Mitigated according to the /sys interface: YES (Not affected)
83 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
85 CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
86 * Information from the /sys interface: Not affected
87 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
89 CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
90 * Mitigated according to the /sys interface: YES (Not affected)
91 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
93 CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
94 * Mitigated according to the /sys interface: YES (Not affected)
95 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
97 CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
98 * Mitigated according to the /sys interface: YES (Not affected)
99 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
101 CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
102 * Mitigated according to the /sys interface: YES (Not affected)
103 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
105 CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
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-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
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-2020-0543 aka Special Register Buffer Data Sampling (SRBDS)
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 > 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