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Ubuntu 22.04 LTS / 24.04 LTS : YAML-LibYAML vulnerability (USN-7632-1)

critical Nessus Plugin ID 241682

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-7632-1 advisory.

 It was discovered that YAML-LibYAML incorrectly handled certain file names. An attacker could possibly use this issue to overwrite arbitrary files.

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected libyaml-libyaml-perl package.

See Also

https://ubuntu.com/security/notices/USN-7632-1

Plugin Details

Severity: Critical

ID: 241682

File Name: ubuntu_USN-7632-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 7/10/2025

Updated: 7/10/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2025-40908

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libyaml-libyaml-perl, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2025

Vulnerability Publication Date: 6/1/2025

Reference Information

CVE: CVE-2025-40908

USN: 7632-1