Dotaz: Je moj procesor chraneny proti utokom spectre a meltdown a im odvodenych ?

[/dev/urandom]

zdravim, stiahol som si skript na overenie odolnosti mojho CPU i5-2520m na mojej starsej T520 voci utokom spectre a meltdown a odvodenych. Je moj CPU odolny, treba nieco riesit ? Tu su vysledky:

Spectre and Meltdown mitigation detection tool v0.42

Checking for vulnerabilities on current system
Kernel is Linux 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64
CPU is Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz

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:  NO 
    * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability:  NO 
  * CPU explicitly indicates not being vulnerable to Meltdown/L1TF (RDCL_NO):  NO 
  * CPU explicitly indicates not being vulnerable to Variant 4 (SSB_NO):  NO 
  * CPU/Hypervisor indicates L1D flushing is not necessary on this system:  NO 
  * Hypervisor indicates host CPU might be vulnerable to RSB underflow (RSBA):  NO 
  * CPU explicitly indicates not being vulnerable to Microarchitectural Data Sampling (MDS_NO):  NO 
  * CPU supports Software Guard Extensions (SGX):  NO 
  * CPU microcode is known to cause stability problems:  NO  (model 0x2a family 0x6 stepping 0x7 ucode 0x2f cpuid 0x206a7)
  * CPU microcode is the latest known available version:  YES  (latest version is 0x2f dated 2019/02/17 according to builtin MCExtractor DB v112 - 2019/05/22)
* 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):  YES 
  * 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):  YES 
  * Vulnerable to CVE-2018-3646 (Foreshadow-NG (VMM), L1 terminal fault):  YES 
  * Vulnerable to CVE-2018-12126 (Fallout, microarchitectural store buffer data sampling (MSBDS)):  YES 
  * Vulnerable to CVE-2018-12130 (ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)):  YES 
  * Vulnerable to CVE-2018-12127 (RIDL, microarchitectural load port data sampling (MLPDS)):  YES 
  * Vulnerable to CVE-2019-11091 (RIDL, microarchitectural data sampling uncacheable memory (MDSUM)):  YES 

CVE-2017-5753 aka 'Spectre Variant 1, bounds check bypass'
* Mitigated according to the /sys interface:  YES  (Mitigation: usercopy/swapgs barriers and __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: 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: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, 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  (Mitigation: PTI)
* Kernel supports Page Table Isolation (PTI):  YES 
  * PTI enabled and active:  YES 
  * Reduced performance impact of PTI:  YES  (CPU supports PCID, performance impact of PTI will be reduced)
* Running as a Xen PV DomU:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: PTI)

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  (firefox ModemManager systemd-journald systemd-logind systemd-resolved systemd-udevd vnstatd)
> 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  (Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable)
* Kernel supports PTE inversion:  YES  (found in kernel image)
* PTE inversion enabled and active:  YES 
> STATUS:  NOT VULNERABLE  (Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable)

CVE-2018-3646 aka 'Foreshadow-NG (VMM), L1 terminal fault'
* Information from the /sys interface: Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
* 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:  YES  (conditional flushes)
  * Hardware-backed L1D flush supported:  YES  (performance impact of the mitigation will be greatly reduced)
  * Hyper-Threading (SMT) is enabled:  YES 
> STATUS:  NOT VULNERABLE  (this system is not running a hypervisor)

CVE-2018-12126 aka 'Fallout, microarchitectural store buffer data sampling (MSBDS)'
* Mitigated according to the /sys interface:  YES  (Mitigation: Clear CPU buffers; SMT vulnerable)
* Kernel supports using MD_CLEAR mitigation:  YES  (md_clear found in /proc/cpuinfo)
* Kernel mitigation is enabled and active:  YES 
* SMT is either mitigated or disabled:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: Clear CPU buffers; SMT vulnerable)

CVE-2018-12130 aka 'ZombieLoad, microarchitectural fill buffer data sampling (MFBDS)'
* Mitigated according to the /sys interface:  YES  (Mitigation: Clear CPU buffers; SMT vulnerable)
* Kernel supports using MD_CLEAR mitigation:  YES  (md_clear found in /proc/cpuinfo)
* Kernel mitigation is enabled and active:  YES 
* SMT is either mitigated or disabled:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: Clear CPU buffers; SMT vulnerable)

CVE-2018-12127 aka 'RIDL, microarchitectural load port data sampling (MLPDS)'
* Mitigated according to the /sys interface:  YES  (Mitigation: Clear CPU buffers; SMT vulnerable)
* Kernel supports using MD_CLEAR mitigation:  YES  (md_clear found in /proc/cpuinfo)
* Kernel mitigation is enabled and active:  YES 
* SMT is either mitigated or disabled:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: Clear CPU buffers; SMT vulnerable)

CVE-2019-11091 aka 'RIDL, microarchitectural data sampling uncacheable memory (MDSUM)'
* Mitigated according to the /sys interface:  YES  (Mitigation: Clear CPU buffers; SMT vulnerable)
* Kernel supports using MD_CLEAR mitigation:  YES  (md_clear found in /proc/cpuinfo)
* Kernel mitigation is enabled and active:  YES 
* SMT is either mitigated or disabled:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: Clear CPU buffers; SMT 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

Need more detailed information about mitigation options? Use --explain
A false sense of security is worse than no security at all, see --disclaimer

Dakujem za odpovede.

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Odpovědi

[debian+]

CPU odolny neni, testovany system ano

[Andrej]

1. Je to mnohem méně podstatné, než by se mohlo zdát.
2. Zastaralý kernel je vždycky špatně, ať už má nebo nemá backportnuté nějaké opravy. Současný kernel je 5.3.7. Proč ho nepoužít? Distribuce to neumí? Pryč s takovou distribucí.

[/dev/null]

Linux Mint 19 - prekompilovat najnovsie jadro koli zavislostism si netrufam - teraz mi na notebooku vsetko bezi.

[jiwopene]

Není problém mít dvě jádra a při startu kdyžtak zvolit staré. Se závislostmi by neměl být problém – s jádrem se kompilují i veškeré moduly.

[Peter Golis]

prekompilovat najnovsie jadro koli zavislostism si netrufam

Mint nemá správcu balíčkov ktorý by sa staral o aktuálne verzie programového vybavenia, alebo rovno o aplikácie záplat (aj kernelových)?

[Jendа]

V Mintu nemáte backports/ppa s kernelem?

[k3dAR]

v *buntu/Mint lze snadno(i kdyz rucne) nainstalovat posledni jadro: https://wiki.ubuntu.com/Kernel/MainlineBuilds
aktualne tam vidim stable "v5.3.7 z 2019-10-18 13:17" a rc "v5.4-rc3 z 2019-10-14"

v Mint 19.2 ma byt novy/vylepseny graficky spravce jader, nevim zda nenabizi i tohle...

[k3dAR]

tak ten vychozi Mint 19.2 aktualizacni GUI nastroj umi vybrat jen z 4.15, 4.18, 5.0 rady (tedy dle prislusnych Ubuntu HWE), tady je PPA kde jsou ty nastroje pozmenene ze (mimojine) lze aktivovat i nabidku jader z te Ubuntu Mainline "vetve": ppa:gm10/linuxmint-tools, pripadne k "tomu" vlakno

[Peter Golis]

Ale bezpečnostné záplaty sa backportujú do jadra, takže mu stačí pravideľne aplikovať záplaty. A to aj robil. Takže tie poradené háky báky okolo akože starého jadra sú mierne zbytočné. Ak teda nemá problémy s nejakým novším HW, ale to nie je predmetom tejto témy.

[Max]

Protože není LTS, které je zaměřované na stable?
U mně má třeba kernel 5.3 regrese v tom, že nemohu použít s mojí GPU druhý monitor. Tím se PC stává nepoužitelný.
Zdar Max

[k3dAR]

U me treba, ze nedistribucni jadro v *buntu neumoznuje vyuzit livepatch, diky kteremu se mi aplikujou automaticky bezpecnostni zaplaty jadra bez potreby restartovat pocitac...

[rastos]

 grep bugs /proc/cpuinfo

[billgates]

grep . /sys/devices/system/cpu/vulnerabilities/*

[test]

grep . /sys/devices/system/cpu/vulnerabilities/* /sys/devices/system/cpu/vulnerabilities/l1tf:Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable /sys/devices/system/cpu/vulnerabilities/mds:Mitigation: Clear CPU buffers; SMT vulnerable /sys/devices/system/cpu/vulnerabilities/meltdown:Mitigation: PTI /sys/devices/system/cpu/vulnerabilities/spec_store_bypass:Mitigation: Speculative Store Bypass disabled via prctl and seccomp /sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: usercopy/swapgs barriers and __user pointer sanitization /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: Full generic retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling