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MX 17 Repository: The Spectre-Meltdown-Checker Thread

Posted: Thu Mar 01, 2018 2:28 pm
by Stevo
Debian has packaged this script for checking your vunerabilities, so we now have it in the main repo.

Simple install and run instructions:

Code: Select all

sudo apt-get install spectre-meltdown-checker
sudo spectre-meltdown-checker

Re: MX 17 Repository: The Spectre-Meltdown-Checker Thread

Posted: Thu Mar 01, 2018 2:45 pm
by Gerson
I already did it and this is the answer of the terminal.
I do not understand anything. :bawling:

Code: Select all

$ sudo spectre-meltdown-checker
Spectre and Meltdown mitigation detection tool v0.34

Checking for vulnerabilities on current system
Kernel is Linux 4.15.3-antix.1-amd64-smp #2 SMP PREEMPT Tue Feb 13 16:49:07 EET 2018 x86_64
CPU is Intel(R) Core(TM) i3-6100U CPU @ 2.30GHz

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  (model 78 stepping 3 ucode 0xba)
* 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'
* Mitigated according to the /sys interface:  YES  (kernel confirms that the mitigation is active)
* Kernel has array_index_mask_nospec:  YES  (1 occurence(s) found of 64 bits array_index_mask_nospec())
> STATUS:  NOT VULNERABLE  (Mitigation: __user pointer sanitization)

CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface:  NO  (kernel confirms your system is vulnerable)
* Mitigation 1
  * Kernel is compiled with IBRS/IBPB support:  NO 
  * 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:  YES 
  * Kernel compiled with a retpoline-aware compiler:  NO  (kernel reports minimal retpoline compilation)
  * Retpoline enabled:  NO 
> STATUS:  VULNERABLE  (Vulnerable: Minimal generic ASM retpoline)

CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Mitigated according to the /sys interface:  YES  (kernel confirms that the mitigation is active)
* Kernel supports Page Table Isolation (PTI):  YES 
* PTI enabled and active:  YES 
* Running as a Xen PV DomU:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: PTI)

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

Re: MX 17 Repository: The Spectre-Meltdown-Checker Thread

Posted: Thu Mar 01, 2018 2:57 pm
by Stevo
It means you should update to a newer antiX 4.15.5, MX 4.15.4, or Liquorix 4.15 kernel if you need Spectre v_2 hardening. The first hardware part means we are all still waiting for Intel to release firmware to fix the problems without screwing up the stability of our machines.

Re: MX 17 Repository: The Spectre-Meltdown-Checker Thread

Posted: Thu Mar 01, 2018 11:40 pm
by Gerson
┬┐With which do you recommend starting the machine?
$ sudo dpkg --get-selections | grep linux-image
[sudo] password for gerson:
linux-image-4.14.0-3-amd64 install
linux-image-4.15.0-5.1-liquorix-amd64 install
linux-image-4.15.3-antix.1-amd64-smp install