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Amazon Linux 2 : microcode_ctl (ALAS-2025-2872)

medium Nessus Plugin ID 237473

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of microcode_ctl installed on the remote host is prior to 2.1-47. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-2872 advisory.

 A potential security vulnerability in some Intel(r) Processors may allow information disclosure. Intel is releasing microcode updates and prescriptive guidance to mitigate this potential vulnerability.

 Info: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01153.html (CVE-2024-28956)

 Potential security vulnerabilities in some Intel(r) Processor indirect branch predictors may allow information disclosure. Intel is releasing microcode updates to mitigate these potential vulnerabilities.

 Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01247.html (CVE-2024-45332)

 Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is releasing microcode updates to mitigate these potential vulnerabilities.

 Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html (CVE-2025-20054)

 Potential security vulnerabilities in some Intel(r) Processors may allow denial of service. Intel is releasing microcode updates to mitigate these potential vulnerabilities.

 Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01244.html (CVE-2025-20103)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update microcode_ctl' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2025-2872.html

https://alas.aws.amazon.com/cve/html/CVE-2024-28956.html

https://alas.aws.amazon.com/cve/html/CVE-2024-45332.html

https://alas.aws.amazon.com/cve/html/CVE-2025-20054.html

https://alas.aws.amazon.com/cve/html/CVE-2025-20103.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: Medium

ID: 237473

File Name: al2_ALAS-2025-2872.nasl

Version: 1.1

Type: local

Agent: unix

Published: 5/29/2025

Updated: 5/29/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Low

Base Score: 3.8

Temporal Score: 2.8

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2024-45332

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.8

Threat Score: 4.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2025-20054

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:microcode_ctl, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:microcode_ctl-debuginfo

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 5/29/2025

Vulnerability Publication Date: 5/13/2025

Reference Information

CVE: CVE-2024-28956, CVE-2024-45332, CVE-2025-20054, CVE-2025-20103