--- /dev/null
+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 4.15.0-60-generic #67-Ubuntu SMP Thu Aug 22 16:55:30 UTC 2019 x86_64
+ CPU is Intel(R) Xeon(R) Gold 6252N CPU @ 2.30GHz
+
+ 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: YES
+ * CPU indicates L1D flush capability: YES (L1D flush feature bit)
+ * 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: YES
+ * 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 0x55 family 0x6 stepping 0x7 ucode 0x5000021 cpuid 0x50657)
+ * CPU microcode is the latest known available version: awk: fatal: cannot open file `bash' for reading (No 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: usercopy/swapgs barriers and __user pointer saniation)
+ * 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 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: usercopy/swapgs barriers and __user pointer sanitization)
+
+ CVE-2017-5715 aka 'Spectre Variant 2, branch target injection'
+ * Mitigated according to the /sys interface: YES (Mitigation: Enhanced IBRS, IBPB: conditional, RSB filling)
+ * Mitigation 1
+ * Kernel is compiled with IBRS support: YES
+ * IBRS enabled and active: YES (Enhanced flavor, performance impact will be greatly reduced)
+ * 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 supports RSB filling: YES
+ > STATUS: NOT VULNERABLE (Enhanced IBRS + 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: NO
+ * Reduced performance impact of PTI: YES (CPU supports INVPCID, performance impact of PTI will be greatly reduced)
+ * 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 ((deleted) 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 /proc/cpuinfo)
+ * L1D flush enabled: NO
+ * Hardware-backed L1D flush supported: YES (performance impact of the mitigation will be greatly reduced)
+
+ * Hyper-Threading (SMT) is enabled: YES
+ > 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
+
Code Review / csit.git / blobdiff