Masalah
Bagaimana memeriksa server yang lemah terhadap Spectre & Meltdown?
Solusi
Gunakan script Checker ini.
$ ./spectre-meltdown-checker.sh
Spectre and Meltdown mitigation detection tool v0.27
Checking for vulnerabilities against live running kernel Linux 4.4.0-78-generic #99-Ubuntu SMP Thu Apr 27 15:29:09 UTC 2017 x86_64
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Checking count of LFENCE opcodes in kernel: NO
> STATUS: VULNERABLE (only 33 opcodes found, should be >= 70, heuristic to be improved when official patches become available)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Hardware (CPU microcode) support for mitigation: NO
* Kernel support for IBRS: NO
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* Mitigation 2
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: 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): NO
* PTI enabled and active: NO
> STATUS: VULNERABLE (PTI is needed to mitigate the vulnerability)
A false sense of security is worse than no security at all, see --disclaimer
Referensi: