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 5.4.0-65-generic #73-Ubuntu SMP Mon Jan 18 17:25:17 UTC 2021 x86_64
15 CPU is Intel(R) Atom(TM) CPU C3858 @ 2.00GHz
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: NO
29 * L1 data cache invalidation
30 * CPU indicates L1D flush capability: NO
31 * Microarchitectural Data Sampling
32 * VERW instruction is available: NO
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: NO
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: NO
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): NO
45 * CPU explicitly indicates not being affected by TSX Asynchronous Abort (TAA_NO): NO
46 * CPU explicitly indicates not being affected by iTLB Multihit (PSCHANGE_MSC_NO): NO
47 * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): NO
48 * CPU supports Transactional Synchronization Extensions (TSX): NO
49 * CPU supports Software Guard Extensions (SGX): NO
50 * CPU supports Special Register Buffer Data Sampling (SRBDS): NO
51 * CPU microcode is known to cause stability problems: NO (family 0x6 model 0x5f stepping 0x1 ucode 0x20 cpuid 0x506f1)
52 * CPU microcode is the latest known available version: NO (latest version is 0x36 dated 2021/05/10 according to builtin firmwares DB v222+i20220208)
53 * CPU vulnerability to the speculative execution attack variants
54 * Affected by CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
55 * Affected by CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
56 * Affected by CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
57 * Affected by CVE-2018-3640 (Variant 3a, rogue system register read): YES
58 * Affected by CVE-2018-3639 (Variant 4, speculative store bypass): YES
59 * Affected by CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
60 * Affected by CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): NO
61 * Affected by CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): NO
62 * Affected by CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
63 * Affected by CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
64 * Affected by CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
65 * Affected by CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
66 * Affected by CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
67 * Affected by CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): NO
68 * Affected by CVE-2020-0543 (Special Register Buffer Data Sampling (SRBDS)): NO
70 CVE-2017-5753 aka Spectre Variant 1, bounds check bypass
71 * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
72 > STATUS: UNKNOWN (/sys vulnerability interface use forced, but its not available!)
74 CVE-2017-5715 aka Spectre Variant 2, branch target injection
75 * Mitigated according to the /sys interface: YES (Mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: disabled, RSB filling)
76 > STATUS: VULNERABLE (IBRS+IBPB or retpoline+IBPB is needed to mitigate the vulnerability)
78 CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
79 * Mitigated according to the /sys interface: YES (Not affected)
80 * Running as a Xen PV DomU: NO
81 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
83 CVE-2018-3640 aka Variant 3a, rogue system register read
84 * CPU microcode mitigates the vulnerability: NO
85 > STATUS: VULNERABLE (an up-to-date CPU microcode is needed to mitigate this vulnerability)
87 CVE-2018-3639 aka Variant 4, speculative store bypass
88 * Mitigated according to the /sys interface: NO (Vulnerable)
89 > STATUS: VULNERABLE (Neither your CPU nor your kernel support SSBD)
91 CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
92 * CPU microcode mitigates the vulnerability: N/A
93 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
95 CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
96 * Mitigated according to the /sys interface: YES (Not affected)
97 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
99 CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
100 * Information from the /sys interface: Not affected
101 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
103 CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
104 * Mitigated according to the /sys interface: YES (Not affected)
105 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
107 CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
108 * Mitigated according to the /sys interface: YES (Not affected)
109 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
111 CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
112 * Mitigated according to the /sys interface: YES (Not affected)
113 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
115 CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
116 * Mitigated according to the /sys interface: YES (Not affected)
117 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
119 CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
120 * Mitigated according to the /sys interface: YES (Not affected)
121 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
123 CVE-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
124 * Mitigated according to the /sys interface: YES (Not affected)
125 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
127 CVE-2020-0543 aka Special Register Buffer Data Sampling (SRBDS)
128 * Mitigated according to the /sys interface: YES (Not affected)
129 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not affected)
131 > SUMMARY: CVE-2017-5753:?? CVE-2017-5715:KO CVE-2017-5754:OK CVE-2018-3640:KO CVE-2018-3639:KO 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