CVE-2024-20505: ClamAV Memory Handling DoS

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-04 · updated 2026-06-17
Weakness: CWE-125

Description

A vulnerability in the PDF parsing module of Clam AntiVirus (ClamAV) versions 1.4.0, 1.3.2 and prior versions, all 1.2.x versions, 1.0.6 and prior versions, all 0.105.x versions, all 0.104.x versions, and 0.103.11 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to an out of bounds read. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. An exploit could allow the attacker to terminate the scanning process.

Affected products

Cisco ClamAV: before 0.103.12; from 0.104.0 before 1.0.7; from 1.2.0 before 1.3.2; 1.4.0 — fixed in 0.103.12, 1.0.7, 1.3.2

How to fix

Upgrade to a fixed version: Cisco ClamAV 0.103.12, 1.0.7, 1.3.2. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-20505 or the next vulnerability affects your stack