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Amazon Linux 2 : libxml2, --advisory ALAS2-2025-2977 (ALAS-2025-2977)

high Nessus Plugin ID 261343

Synopsis

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

Description

The version of libxml2 installed on the remote host is prior to 2.9.1-6. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2977 advisory.

 A flaw was found in libxslt where the attribute type, atype, flags are modified in a way that corrupts internal memory management. When XSLT functions, such as the key() process, result in tree fragments, this corruption prevents the proper cleanup of ID attributes. As a result, the system may access freed memory, causing crashes or enabling attackers to trigger heap corruption. (CVE-2025-7425)

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 libxml2' or or 'yum update --advisory ALAS2-2025-2977' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2025-2977.html

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

https://explore.alas.aws.amazon.com/CVE-2025-7425.html

Plugin Details

Severity: High

ID: 261343

File Name: al2_ALAS-2025-2977.nasl

Version: 1.1

Type: local

Agent: unix

Published: 9/4/2025

Updated: 9/4/2025

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

Risk Information

VPR

Risk Factor: High

Score: 7.9

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

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

CVSS Score Source: CVE-2025-7425

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libxml2-devel, p-cpe:/a:amazon:linux:libxml2-debuginfo, p-cpe:/a:amazon:linux:libxml2, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:libxml2-python, p-cpe:/a:amazon:linux:libxml2-static

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/4/2025

Vulnerability Publication Date: 7/10/2025

Reference Information

CVE: CVE-2025-7425