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new variant 4 found

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stsoh
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Joined: Sun Aug 20, 2017 10:11 am

new variant 4 found

#1 Post by stsoh » Tue May 22, 2018 5:34 am

https://www.theregister.co.uk/2018/05/2 ... ft_google/

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Spectre and Meltdown mitigation detection tool v0.37+

Checking for vulnerabilities on current system
Kernel is Linux 4.16.0-10.1-liquorix-amd64 #1 ZEN SMP PREEMPT liquorix 4.16-3.1~sid (2018-05-19) x86_64
CPU is Pentium(R) Dual-Core  CPU      E5400  @ 2.70GHz

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 
  * Speculative Store Bypass Disable (SSBD)
    * CPU indicates SSBD 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 explicitly indicates not being vulnerable to Variant 4 (SSB_NO):  NO 
  * CPU microcode is known to cause stability problems:  NO  (model 23 stepping 10 ucode 0xa0b cpuid 0x1067a)
* CPU vulnerability to the speculative execution attack variants
  * Vulnerable to Variant 1:  YES 
  * Vulnerable to Variant 2:  NO 
  * Vulnerable to Variant 3:  YES 
  * Vulnerable to Variant 3a:  YES 
  * Vulnerable to Variant 4:  YES 

CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface:  YES  (Mitigation: __user pointer sanitization)
* Kernel has array_index_mask_nospec (x86):  UNKNOWN  (couldn't check (missing 'lzop' tool, please install it, usually it's in the 'lzop' package))
* Kernel has the Red Hat/Ubuntu patch:  UNKNOWN  (couldn't check (missing 'lzop' tool, please install it, usually it's in the 'lzop' package))
* Kernel has mask_nospec64 (arm):  UNKNOWN  (couldn't check (missing 'lzop' tool, please install it, usually it's in the 'lzop' package))
* Checking count of LFENCE instructions following a jump in kernel...  UNKNOWN  (couldn't check (missing 'lzop' tool, please install it, usually it's in the 'lzop' package))
> STATUS:  NOT VULNERABLE  (Mitigation: __user pointer sanitization)

CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface:  YES  (Mitigation: Full generic retpoline)
* Mitigation 1
  * Kernel is compiled with IBRS support:  YES 
    * IBRS enabled and active:  NO 
  * Kernel is compiled with IBPB support:  UNKNOWN  (in offline mode, we need the kernel image to be able to tell)
    * IBPB enabled and active:  NO 
* 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  (your CPU vendor reported your CPU model as not vulnerable)

CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* 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:  NO  (PCID/INVPCID not supported, performance impact of PTI will be significant)
* Running as a Xen PV DomU:  NO 
> STATUS:  NOT VULNERABLE  (Mitigation: PTI)

CVE-2018-3640 [rogue system register read] aka 'Variant 3a'
> STATUS:  UNKNOWN  (new vulnerability, script will be updated when more technical information is available in the next hours/days)

CVE-2018-3639 [speculative store bypass] aka 'Variant 4'
> STATUS:  UNKNOWN  (new vulnerability, script will be updated when more technical information is available in the next hours/days)

A false sense of security is worse than no security at all, see --disclaimer
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MX-17.1_x64 Horizon, G41M-P33 Combo(MS-7592), Pentium E5400 (min/max: 1203/2700 MHz), 8Gb RAM (800 MT/s),
Intel 4 Series Integrated Graphics, Realtek PCIe Fast RTL8101/2/6E, PCI Gigabit RTL8169 Ethernets.

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