Out-of-bounds Read Affecting clamav1.4-freshclam package, versions <0:1.4.3-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.09% (26th percentile)

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  • Snyk IDSNYK-AMZN2023-CLAMAV14FRESHCLAM-10694675
  • published11 Jul 2025
  • disclosed18 Jun 2025

Introduced: 18 Jun 2025

CVE-2025-20234  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 clamav1.4-freshclam to version 0:1.4.3-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2025-1081.

NVD Description

Note: Versions mentioned in the description apply only to the upstream clamav1.4-freshclam package and not the clamav1.4-freshclam package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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 .

CVSS Base Scores

version 3.1