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 v0.43
13 awk: fatal: cannot open file `bash for reading (No such file or directory)
14 Checking for vulnerabilities on current system
15 Kernel is Linux 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019 x86_64
16 CPU is Intel(R) Xeon(R) Platinum 8280 CPU @ 2.70GHz
19 * Hardware support (CPU microcode) for mitigation techniques
20 * Indirect Branch Restricted Speculation (IBRS)
21 * SPEC_CTRL MSR is available: YES
22 * CPU indicates IBRS capability: YES (SPEC_CTRL feature bit)
23 * Indirect Branch Prediction Barrier (IBPB)
24 * PRED_CMD MSR is available: YES
25 * CPU indicates IBPB capability: YES (SPEC_CTRL feature bit)
26 * Single Thread Indirect Branch Predictors (STIBP)
27 * SPEC_CTRL MSR is available: YES
28 * CPU indicates STIBP capability: YES (Intel STIBP feature bit)
29 * Speculative Store Bypass Disable (SSBD)
30 * CPU indicates SSBD capability: YES (Intel SSBD)
31 * L1 data cache invalidation
32 * FLUSH_CMD MSR is available: YES
33 * CPU indicates L1D flush capability: YES (L1D flush feature bit)
34 * Microarchitectural Data Sampling
35 * VERW instruction is available: YES (MD_CLEAR feature bit)
36 * Enhanced IBRS (IBRS_ALL)
37 * CPU indicates ARCH_CAPABILITIES MSR availability: YES
38 * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: YES
39 * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO): YES
40 * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): NO
41 * CPU/Hypervisor indicates L1D flushing is not necessary on this system: YES
42 * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
43 * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): YES
44 * CPU explicitly indicates not being vulnerable to TSX Asynchronous Abort (TAA_NO): NO
45 * CPU explicitly indicates not being vulnerable to iTLB Multihit (PSCHANGE_MSC_NO): NO
46 * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): YES
47 * TSX_CTRL MSR indicates TSX RTM is disabled: YES
48 * TSX_CTRL MSR indicates TSX CPUID bit is cleared: YES
49 * CPU supports Transactional Synchronization Extensions (TSX): NO
50 * CPU supports Software Guard Extensions (SGX): NO
51 * CPU microcode is known to cause stability problems: NO (model 0x55 family 0x6 stepping 0x7 ucode 0x500002c cpuid 0x50657)
52 * CPU microcode is the latest known available version: awk: fatal: cannot open file `bash for reading (No such file or directory)
53 UNKNOWN (latest microcode version for your CPU model is unknown)
54 * CPU vulnerability to the speculative execution attack variants
55 * Vulnerable to CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
56 * Vulnerable to CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
57 * Vulnerable to CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
58 * Vulnerable to CVE-2018-3640 (Variant 3a, rogue system register read): YES
59 * Vulnerable to CVE-2018-3639 (Variant 4, speculative store bypass): YES
60 * Vulnerable to CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
61 * Vulnerable to CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
62 * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
63 * Vulnerable to CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
64 * Vulnerable to CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
65 * Vulnerable to CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
66 * Vulnerable to CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
67 * Vulnerable to CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
68 * Vulnerable to CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
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 * Kernel has array_index_mask_nospec: YES (1 occurrence(s) found of x86 64 bits array_index_mask_nospec())
73 * Kernel has the Red Hat/Ubuntu patch: NO
74 * Kernel has mask_nospec64 (arm64): NO
75 > STATUS: NOT VULNERABLE (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
77 CVE-2017-5715 aka Spectre Variant 2, branch target injection
78 * Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
80 * Kernel is compiled with IBRS support: YES
81 * IBRS enabled and active: YES (Enhanced flavor, performance impact will be greatly reduced)
82 * Kernel is compiled with IBPB support: YES
83 * IBPB enabled and active: YES
85 * Kernel has branch predictor hardening (arm): NO
86 * Kernel compiled with retpoline option: YES
87 * Kernel supports RSB filling: YES
88 > STATUS: NOT VULNERABLE (Enhanced IBRS + IBPB are mitigating the vulnerability)
90 CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
91 * Mitigated according to the /sys interface: YES (Not affected)
92 * Kernel supports Page Table Isolation (PTI): YES
93 * PTI enabled and active: UNKNOWN (dmesg truncated, please reboot and relaunch this script)
94 * Reduced performance impact of PTI: YES (CPU supports INVPCID, performance impact of PTI will be greatly reduced)
95 * Running as a Xen PV DomU: NO
96 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
98 CVE-2018-3640 aka Variant 3a, rogue system register read
99 * CPU microcode mitigates the vulnerability: YES
100 > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
102 CVE-2018-3639 aka Variant 4, speculative store bypass
103 * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
104 * Kernel supports disabling speculative store bypass (SSB): YES (found in /proc/self/status)
105 * SSB mitigation is enabled and active: YES (per-thread through prctl)
106 * SSB mitigation currently active for selected processes: YES (systemd-journald systemd-logind systemd-networkd systemd-resolved systemd-timesyncd systemd-udevd)
107 > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
109 CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
110 * CPU microcode mitigates the vulnerability: N/A
111 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
113 CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
114 * Mitigated according to the /sys interface: YES (Not affected)
115 * Kernel supports PTE inversion: YES (found in kernel image)
116 * PTE inversion enabled and active: NO
117 > STATUS: NOT VULNERABLE (Not affected)
119 CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
120 * Information from the /sys interface: Not affected
121 * This system is a host running a hypervisor: NO
123 * EPT is disabled: NO
125 * L1D flush is supported by kernel: YES (found flush_l1d in /proc/cpuinfo)
126 * L1D flush enabled: NO
127 * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
128 * Hyper-Threading (SMT) is enabled: YES
129 > STATUS: NOT VULNERABLE (your kernel reported your CPU model as not vulnerable)
131 CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
132 * Mitigated according to the /sys interface: YES (Not affected)
133 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
134 * Kernel mitigation is enabled and active: NO
135 * SMT is either mitigated or disabled: NO
136 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
138 CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
139 * Mitigated according to the /sys interface: YES (Not affected)
140 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
141 * Kernel mitigation is enabled and active: NO
142 * SMT is either mitigated or disabled: NO
143 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
145 CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
146 * Mitigated according to the /sys interface: YES (Not affected)
147 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
148 * Kernel mitigation is enabled and active: NO
149 * SMT is either mitigated or disabled: NO
150 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
152 CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
153 * Mitigated according to the /sys interface: YES (Not affected)
154 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
155 * Kernel mitigation is enabled and active: NO
156 * SMT is either mitigated or disabled: NO
157 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
159 CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
160 * Mitigated according to the /sys interface: YES (Mitigation: TSX disabled)
161 * TAA mitigation is supported by kernel: YES (found tsx_async_abort in kernel image)
162 * TAA mitigation enabled and active: YES (Mitigation: TSX disabled)
163 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
165 CVE-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
166 * Mitigated according to the /sys interface: YES (KVM: Mitigation: Split huge pages)
167 * This system is a host running a hypervisor: NO
168 * iTLB Multihit mitigation is supported by kernel: YES (found itlb_multihit in kernel image)
169 * iTLB Multihit mitigation enabled and active: YES (KVM: Mitigation: Split huge pages)
170 > STATUS: NOT VULNERABLE (this system is not running a hypervisor)
172 > 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:OK CVE-2018-12207:OK
176 awk: fatal: cannot open file `bash for reading (No such file or directory)
177 Checking for vulnerabilities on current system
178 Kernel is Linux 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019 x86_64
179 CPU is Intel(R) Xeon(R) Gold 6252N CPU @ 2.30GHz
182 * Hardware support (CPU microcode) for mitigation techniques
183 * Indirect Branch Restricted Speculation (IBRS)
184 * SPEC_CTRL MSR is available: YES
185 * CPU indicates IBRS capability: YES (SPEC_CTRL feature bit)
186 * Indirect Branch Prediction Barrier (IBPB)
187 * PRED_CMD MSR is available: YES
188 * CPU indicates IBPB capability: YES (SPEC_CTRL feature bit)
189 * Single Thread Indirect Branch Predictors (STIBP)
190 * SPEC_CTRL MSR is available: YES
191 * CPU indicates STIBP capability: YES (Intel STIBP feature bit)
192 * Speculative Store Bypass Disable (SSBD)
193 * CPU indicates SSBD capability: YES (Intel SSBD)
194 * L1 data cache invalidation
195 * FLUSH_CMD MSR is available: YES
196 * CPU indicates L1D flush capability: YES (L1D flush feature bit)
197 * Microarchitectural Data Sampling
198 * VERW instruction is available: YES (MD_CLEAR feature bit)
199 * Enhanced IBRS (IBRS_ALL)
200 * CPU indicates ARCH_CAPABILITIES MSR availability: YES
201 * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: YES
202 * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO): YES
203 * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO): NO
204 * CPU/Hypervisor indicates L1D flushing is not necessary on this system: YES
205 * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA): NO
206 * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO): YES
207 * CPU explicitly indicates not being vulnerable to TSX Asynchronous Abort (TAA_NO): NO
208 * CPU explicitly indicates not being vulnerable to iTLB Multihit (PSCHANGE_MSC_NO): NO
209 * CPU explicitly indicates having MSR for TSX control (TSX_CTRL_MSR): YES
210 * TSX_CTRL MSR indicates TSX RTM is disabled: YES
211 * TSX_CTRL MSR indicates TSX CPUID bit is cleared: YES
212 * CPU supports Transactional Synchronization Extensions (TSX): NO
213 * CPU supports Software Guard Extensions (SGX): NO
214 * CPU microcode is known to cause stability problems: NO (family 0x6 model 0x55 stepping 0x7 ucode 0x500002c cpuid 0x50657)
215 * CPU microcode is the latest known available version: awk: fatal: cannot open file `bash for reading (No such file or directory)
216 UNKNOWN (latest microcode version for your CPU model is unknown)
217 * CPU vulnerability to the speculative execution attack variants
218 * Vulnerable to CVE-2017-5753 (Spectre Variant 1, bounds check bypass): YES
219 * Vulnerable to CVE-2017-5715 (Spectre Variant 2, branch target injection): YES
220 * Vulnerable to CVE-2017-5754 (Variant 3, Meltdown, rogue data cache load): NO
221 * Vulnerable to CVE-2018-3640 (Variant 3a, rogue system register read): YES
222 * Vulnerable to CVE-2018-3639 (Variant 4, speculative store bypass): YES
223 * Vulnerable to CVE-2018-3615 (Foreshadow (SGX), L1 terminal fault): NO
224 * Vulnerable to CVE-2018-3620 (Foreshadow-NG (OS), L1 terminal fault): YES
225 * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault): YES
226 * Vulnerable to CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)): NO
227 * Vulnerable to CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)): NO
228 * Vulnerable to CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)): NO
229 * Vulnerable to CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)): NO
230 * Vulnerable to CVE-2019-11135 (ZombieLoad V2, TSX Asynchronous Abort (TAA)): NO
231 * Vulnerable to CVE-2018-12207 (No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)): YES
233 CVE-2017-5753 aka Spectre Variant 1, bounds check bypass
234 * Mitigated according to the /sys interface: YES (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
235 * Kernel has array_index_mask_nospec: YES (1 occurrence(s) found of x86 64 bits array_index_mask_nospec())
236 * Kernel has the Red Hat/Ubuntu patch: NO
237 * Kernel has mask_nospec64 (arm64): NO
238 > STATUS: NOT VULNERABLE (Mitigation: usercopy/swapgs barriers and __user pointer sanitization)
240 CVE-2017-5715 aka Spectre Variant 2, branch target injection
241 * Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
243 * Kernel is compiled with IBRS support: YES
244 * IBRS enabled and active: YES (Enhanced flavor, performance impact will be greatly reduced)
245 * Kernel is compiled with IBPB support: YES
246 * IBPB enabled and active: YES
248 * Kernel has branch predictor hardening (arm): NO
249 * Kernel compiled with retpoline option: YES
250 * Kernel supports RSB filling: YES
251 > STATUS: NOT VULNERABLE (Enhanced IBRS + IBPB are mitigating the vulnerability)
253 CVE-2017-5754 aka Variant 3, Meltdown, rogue data cache load
254 * Mitigated according to the /sys interface: YES (Not affected)
255 * Kernel supports Page Table Isolation (PTI): YES
256 * PTI enabled and active: UNKNOWN (dmesg truncated, please reboot and relaunch this script)
257 * Reduced performance impact of PTI: YES (CPU supports INVPCID, performance impact of PTI will be greatly reduced)
258 * Running as a Xen PV DomU: NO
259 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
261 CVE-2018-3640 aka Variant 3a, rogue system register read
262 * CPU microcode mitigates the vulnerability: YES
263 > STATUS: NOT VULNERABLE (your CPU microcode mitigates the vulnerability)
265 CVE-2018-3639 aka Variant 4, speculative store bypass
266 * Mitigated according to the /sys interface: YES (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
267 * Kernel supports disabling speculative store bypass (SSB): YES (found in /proc/self/status)
268 * SSB mitigation is enabled and active: YES (per-thread through prctl)
269 * SSB mitigation currently active for selected processes: YES (systemd-journald systemd-logind systemd-networkd systemd-resolved systemd-timesyncd systemd-udevd)
270 > STATUS: NOT VULNERABLE (Mitigation: Speculative Store Bypass disabled via prctl and seccomp)
272 CVE-2018-3615 aka Foreshadow (SGX), L1 terminal fault
273 * CPU microcode mitigates the vulnerability: N/A
274 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
276 CVE-2018-3620 aka Foreshadow-NG (OS), L1 terminal fault
277 * Mitigated according to the /sys interface: YES (Not affected)
278 * Kernel supports PTE inversion: YES (found in kernel image)
279 * PTE inversion enabled and active: NO
280 > STATUS: NOT VULNERABLE (Not affected)
282 CVE-2018-3646 aka Foreshadow-NG (VMM), L1 terminal fault
283 * Information from the /sys interface: Not affected
284 * This system is a host running a hypervisor: NO
286 * EPT is disabled: NO
288 * L1D flush is supported by kernel: YES (found flush_l1d in /proc/cpuinfo)
289 * L1D flush enabled: NO
290 * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
291 * Hyper-Threading (SMT) is enabled: YES
292 > STATUS: NOT VULNERABLE (your kernel reported your CPU model as not vulnerable)
294 CVE-2018-12126 aka Fallout, microarchitectural store buffer data sampling (MSBDS)
295 * Mitigated according to the /sys interface: YES (Not affected)
296 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
297 * Kernel mitigation is enabled and active: NO
298 * SMT is either mitigated or disabled: NO
299 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
301 CVE-2018-12130 aka ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)
302 * Mitigated according to the /sys interface: YES (Not affected)
303 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
304 * Kernel mitigation is enabled and active: NO
305 * SMT is either mitigated or disabled: NO
306 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
308 CVE-2018-12127 aka RIDL, microarchitectural load port data sampling (MLPDS)
309 * Mitigated according to the /sys interface: YES (Not affected)
310 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
311 * Kernel mitigation is enabled and active: NO
312 * SMT is either mitigated or disabled: NO
313 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
315 CVE-2019-11091 aka RIDL, microarchitectural data sampling uncacheable memory (MDSUM)
316 * Mitigated according to the /sys interface: YES (Not affected)
317 * Kernel supports using MD_CLEAR mitigation: YES (md_clear found in /proc/cpuinfo)
318 * Kernel mitigation is enabled and active: NO
319 * SMT is either mitigated or disabled: NO
320 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
322 CVE-2019-11135 aka ZombieLoad V2, TSX Asynchronous Abort (TAA)
323 * Mitigated according to the /sys interface: YES (Mitigation: TSX disabled)
324 * TAA mitigation is supported by kernel: YES (found tsx_async_abort in kernel image)
325 * TAA mitigation enabled and active: YES (Mitigation: TSX disabled)
326 > STATUS: NOT VULNERABLE (your CPU vendor reported your CPU model as not vulnerable)
328 CVE-2018-12207 aka No eXcuses, iTLB Multihit, machine check exception on page size changes (MCEPSC)
329 * Mitigated according to the /sys interface: YES (KVM: Mitigation: Split huge pages)
330 * This system is a host running a hypervisor: NO
331 * iTLB Multihit mitigation is supported by kernel: YES (found itlb_multihit in kernel image)
332 * iTLB Multihit mitigation enabled and active: YES (KVM: Mitigation: Split huge pages)
333 > STATUS: NOT VULNERABLE (this system is not running a hypervisor)
335 > 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:OK CVE-2018-12207:OK