CVE-2025-20260 Information

Jun 19, 2025 cve

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8

CNNVD-202506-2353 (Published: 2025-06-18)

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