Amazon Linux 2 : giflib, --advisory ALAS2-2025-2998 (ALAS-2025-2998)

high Nessus Plugin ID 265073

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Synopsis

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

Description

The version of giflib installed on the remote host is prior to 4.1.6-9. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2998 advisory.

A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of memory exception or denial of service via a gif format file. (CVE-2021-40633)

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 giflib' or or 'yum update --advisory ALAS2-2025-2998' to update your system.

Plugin Details

Severity: High

ID: 265073

File Name: al2_ALAS-2025-2998.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 9/16/2025

Updated: 9/16/2025

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: 5.1

Temporal Score: 4

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

CVSS Score Source: CVE-2021-40633

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:giflib-debuginfo, p-cpe:/a:amazon:linux:giflib-devel, p-cpe:/a:amazon:linux:giflib, p-cpe:/a:amazon:linux:giflib-utils

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

Exploit Available: true

Exploit Ease: No known exploits are available

Patch Publication Date: 9/16/2025

Vulnerability Publication Date: 6/14/2022

Reference Information

CVE: CVE-2021-40633

Detections

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