Secure Endpoint and ClamAV
CVE-2024-20505: ClamAV Memory Handling DoS
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| ClamAV 1.4 | See the advisory |
| ClamAV 1.3 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.0 | See the advisory |
| ClamAV 1.2 | See the advisory |
| ClamAV 0.105 | See the advisory |
| ClamAV 0.104 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
| ClamAV 0.103 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.