Amazon Linux 2023 : clamav1.4, clamav1.4-data, clamav1.4-devel (ALAS2023-2025-1081)

critical Nessus Plugin ID 241789

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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 ALAS2023-2025-1081 advisory.

A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software.For a description of this vulnerability, see the . (CVE-2025-20234)

A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process. (CVE-2025-20260)

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 clamav1.4 --releasever 2023.8.20250707' to update your system.

Plugin Details

Severity: Critical

ID: 241789

File Name: al2023_ALAS2023-2025-1081.nasl

Version: 1.2

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 7/10/2025

Updated: 7/14/2025

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2025-20260

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:clamav1.4-filesystem, p-cpe:/a:amazon:linux:clamav1.4, p-cpe:/a:amazon:linux:clamav1.4-freshclam-debuginfo, p-cpe:/a:amazon:linux:clamav1.4-debugsource, p-cpe:/a:amazon:linux:clamav1.4-lib, p-cpe:/a:amazon:linux:clamav1.4-milter-debuginfo, p-cpe:/a:amazon:linux:clamd1.4, p-cpe:/a:amazon:linux:clamav1.4-doc, p-cpe:/a:amazon:linux:clamav1.4-milter, p-cpe:/a:amazon:linux:clamav1.4-devel, p-cpe:/a:amazon:linux:clamd1.4-debuginfo, p-cpe:/a:amazon:linux:clamav1.4-lib-debuginfo, p-cpe:/a:amazon:linux:clamav1.4-freshclam, p-cpe:/a:amazon:linux:clamav1.4-data, p-cpe:/a:amazon:linux:clamav1.4-debuginfo, cpe:/o:amazon:linux:2023

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/10/2025

Vulnerability Publication Date: 6/18/2025

Reference Information

CVE: CVE-2025-20234, CVE-2025-20260

Detections

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