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• #57973 Sonja nagyúr Frawly #57971

  Új Válasz 2018-01-30 16:01:47 #57973

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  Sonja

  nagyúr

  válasz Frawly #57971 üzenetére

  Érdekes, nekem a Spectre2 a VULNERABLE, a Spectre1 és a Meltdown nem.

  Spectre and Meltdown mitigation detection tool v0.33+

Checking for vulnerabilities on current system
Kernel is Linux 3.13.0-141-lowlatency #190-Ubuntu SMP PREEMPT Fri Jan 19 13:43:10 UTC 2018 x86_64
CPU is Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz

Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO): NO
* CPU microcode is known to cause stability problems: NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES

CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Kernel has array_index_mask_nospec: NO
* Checking count of LFENCE opcodes in kernel: YES (99 opcodes found, which is >= 70, heuristic to be improved when official patches become available)
> STATUS: NOT VULNERABLE (Kernel source has PROBABLY been patched to mitigate the vulnerability (LFENCE opcodes heuristic))

CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: YES
* Currently enabled features
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* IBPB enabled: NO
* Mitigation 2
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: NO
* Retpoline enabled: NO
> STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with retpoline are needed to mitigate the vulnerability)

CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
> STATUS: NOT VULNERABLE (PTI mitigates the vulnerability)

A false sense of security is worse than no security at all, see --disclaimer

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