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Amazon Linux 2 : libpq, --advisory ALAS2POSTGRESQL14-2025-020 (ALASPOSTGRESQL14-2025-020)

medium Nessus Plugin ID 277749

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Synopsis

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

Description

The version of libpq installed on the remote host is prior to 14.20-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2POSTGRESQL14-2025-020 advisory.

 Integer wraparound in multiple PostgreSQL libpq client library functions allows an application input provider or network peer to cause libpq to undersize an allocation and write out-of-bounds by hundreds of megabytes. This results in a segmentation fault for the application using libpq. Versions before PostgreSQL 18.1, 17.7, 16.11, 15.15, 14.20, and 13.23 are affected. (CVE-2025-12818)

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 libpq' or or 'yum update --advisory ALAS2POSTGRESQL14-2025-020' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2POSTGRESQL14-2025-020.html

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

https://explore.alas.aws.amazon.com/CVE-2025-12818.html

Plugin Details

Severity: Medium

ID: 277749

File Name: al2_ALASPOSTGRESQL14-2025-020.nasl

Version: 1.1

Type: local

Agent: unix

Published: 12/8/2025

Updated: 12/8/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-12818

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:libpq, p-cpe:/a:amazon:linux:libpq-devel, p-cpe:/a:amazon:linux:libpq-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: 12/8/2025

Vulnerability Publication Date: 11/13/2025

Reference Information

CVE: CVE-2025-12818