Important: microcode_ctl

Issue Overview:

2024-05-09: CVE-2021-33117 was added to this advisory.

A flaw was found in microcode. Under complex microarchitectural conditions, an unexpected code breakpoint may cause a system hang. The hang was observed on a Skylake server processor, and subsequent analysis indicated additional potentially affected processors. This flaw allows a possible temporary denial of service (TDOS) to occur. (CVE-2021-0127)

Hardware allows activation of test and debug logic at runtime for some Intel® processors which may allow an unauthenticated user to potentially enable escalation of privilege via physical access. (CVE-2021-0146)

Improper access control for some 3rd Generation Intel® Xeon® Scalable Processors before BIOS version MR7, may allow a local attacker to potentially enable information disclosure via local access. (CVE-2021-33117)

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.amzn2.0.11.i686  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.11.i686  
  
src:  
    microcode_ctl-2.1-47.amzn2.0.11.src  
  
x86_64:  
    microcode_ctl-2.1-47.amzn2.0.11.x86_64  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.11.x86_64  

Additional References

Red Hat: CVE-2021-0127, CVE-2021-0146, CVE-2021-33117

Mitre: CVE-2021-0127, CVE-2021-0146, CVE-2021-33117