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Amazon Linux 2023 : libxslt, libxslt-devel, python3-libxslt (ALAS2023-2025-909)

high Nessus Plugin ID 233718

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-909 advisory.

 xsltGetInheritedNsList in libxslt before 1.1.43 has a use-after-free issue related to exclusion of result prefixes. (CVE-2024-55549)

 numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but never restored. This is related to xsltNumberFormatGetValue, xsltEvalXPathPredicate, xsltEvalXPathStringNs, and xsltComputeSortResultInternal. (CVE-2025-24855)

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 'dnf update libxslt --releasever 2023.7.20250331' to update your system.

See Also

https://alas.aws.amazon.com/AL2023/ALAS-2025-909.html

https://alas.aws.amazon.com/cve/html/CVE-2024-55549.html

https://alas.aws.amazon.com/cve/html/CVE-2025-24855.html

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

Plugin Details

Severity: High

ID: 233718

File Name: al2023_ALAS2023-2025-909.nasl

Version: 1.1

Type: local

Agent: unix

Published: 4/1/2025

Updated: 4/1/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, 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-2025-24855

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:python3-libxslt-debuginfo, p-cpe:/a:amazon:linux:libxslt-debugsource, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3-libxslt, p-cpe:/a:amazon:linux:libxslt-debuginfo, p-cpe:/a:amazon:linux:libxslt-devel, p-cpe:/a:amazon:linux:libxslt

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/26/2025

Vulnerability Publication Date: 3/11/2025

Reference Information

CVE: CVE-2024-55549, CVE-2025-24855

IAVA: 2025-A-0187