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amazonAmazonALAS2-2021-1663
HistoryJun 16, 2021 - 8:37 p.m.

Medium: microcode_ctl

2021-06-1620:37:00
alas.aws.amazon.com
22

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

5.9 Medium

AI Score

Confidence

High

2.1 Low

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

0.0004 Low

EPSS

Percentile

14.0%

Issue Overview:

A flaw was found in the Intel Advanced Vector Extensions (AVX) implementation, where a local authenticated attacker with the ability to execute AVX instructions can gather the AVX register state from previous AVX executions. This vulnerability allows information disclosure of the AVX register state. (CVE-2020-8696)

Affected Packages:

microcode_ctl

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update microcode_ctl to update your system.

New Packages:

i686:  
    microcode_ctl-2.1-47.amzn2.0.9.i686  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.9.i686  
  
src:  
    microcode_ctl-2.1-47.amzn2.0.9.src  
  
x86_64:  
    microcode_ctl-2.1-47.amzn2.0.9.x86_64  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.9.x86_64  

Additional References

Red Hat: CVE-2020-8696

Mitre: CVE-2020-8696

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

5.9 Medium

AI Score

Confidence

High

2.1 Low

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

0.0004 Low

EPSS

Percentile

14.0%