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Amazon Linux 2 : runc, --advisory ALAS2NITRO-ENCLAVES-2025-081 (ALASNITRO-ENCLAVES-2025-081)

medium Nessus Plugin ID 281805

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Synopsis

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

Description

The version of runc installed on the remote host is prior to 1.3.4-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2NITRO-ENCLAVES-2025-081 advisory.

 crypto/x509: excluded subdomain constraint does not restrict wildcard SANs

 An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com. (CVE-2025-61727)

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

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

Solution

Run 'yum update runc' or or 'yum update --advisory ALAS2NITRO-ENCLAVES-2025-081' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2NITRO-ENCLAVES-2025-081.html

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

https://explore.alas.aws.amazon.com/CVE-2025-61727.html

Plugin Details

Severity: Medium

ID: 281805

File Name: al2_ALASNITRO-ENCLAVES-2025-081.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/5/2026

Updated: 1/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2025-61727

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/5/2026

Vulnerability Publication Date: 12/2/2025

Reference Information

CVE: CVE-2025-61727

IAVB: 2025-B-0194