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CVE-2024-20380

ClamAV HTML Parser Denial of Service Vulnerability

Published: Apr 18, 2024Updated: Jul 23, 2025 Sources: CVE List NVD BDUCWE-475
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.1%
Top 38.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A vulnerability in the HTML parser of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to an issue in the C to Rust foreign function interface. An attacker could exploit this vulnerability by submitting a crafted file containing HTML content to be scanned by ClamAV on an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-475

Affected Products

ClamAVCiscoSecurity Products / vuln-mgmt-scanner
clamavclamav
On-premSecurity Product
Security Products / vuln-mgmt-scanner
Clam AntivirusThe ClamAV Team
On-prem
Security Products / endpoint-av-edr
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
clamavoss-projectSecurity Productsaka clambc, clamav
the clamav teamoss-projectSecurity Productsaka clam antivirus, clamav

Exploitability

Official Patch Available

References

https://blog.clamav.net/2024/04/clamav-131-123-106-patch-versions.html
blog.clamav.net

Timeline

Published
Apr 18, 2024
Last Updated
Jul 23, 2025

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