1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
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
made public in 2018. Script is available on `Spectre & Meltdown Checker Github
<https://github.com/speed47/spectre-meltdown-checker>`_.
::
Spectre and Meltdown mitigation detection tool v0.42
Checking for vulnerabilities on current system
Kernel is Linux 4.15.0-51-generic #55-Ubuntu SMP Wed May 15 14:27:21 UTC 2019 x86_64
CPU is Intel(R) Atom(TM) CPU C3858 @ 2.00GHz
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: NO
* CPU indicates L1D flush capability: NO
* Microarchitecture 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: NO
* 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 supports Software Guard Extensions (SGX): NO
* CPU microcode is known to cause stability problems: NO (model 0x5f family 0x6 stepping 0x1 ucode 0x2e cpuid 0x506f1)
* CPU microcode is the latest known available version: awk: fatal: cannot open file `bash for reading (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): 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: __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: conditional, IBRS_FW, STIBP: disabled, 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 (Not affected)
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: UNKNOWN (dmesg truncated, please reboot and relaunch this script)
* Reduced performance impact of PTI: NO (PCID/INVPCID not supported, performance impact of PTI will be significant)
* 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)
* 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 (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)
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 kernel image)
* L1D flush enabled: NO
* Hardware-backed L1D flush supported: NO (flush will be done in software, this is slower)
* Hyper-Threading (SMT) is enabled: NO
> STATUS: NOT VULNERABLE (your CPU vendor 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)
* 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)
* 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)
* 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)
* 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
|
