Amazon Linux 2023 : munge, munge-devel, munge-libs (ALAS2023-2026-1453)

high Nessus Plugin ID 301355

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1453 advisory.

MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18. (CVE-2026-25506)

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 'dnf update munge --releasever 2023.10.20260302' or or 'dnf update --advisory ALAS2023-2026-1453 --releasever 2023.10.20260302' to update your system.

Plugin Details

Severity: High

ID: 301355

File Name: al2023_ALAS2023-2026-1453.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 3/6/2026

Updated: 3/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-25506

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:munge-debuginfo, p-cpe:/a:amazon:linux:munge-libs, p-cpe:/a:amazon:linux:munge, p-cpe:/a:amazon:linux:munge-devel, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:munge-debugsource, p-cpe:/a:amazon:linux:munge-libs-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: 3/5/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-25506

Detections

Analytics