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CVE-2024-20380: ClamAV HTML Parser Denial of Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-18 · updated 2026-06-17
• Weakness: CWE-475

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.

Affected products

• Cisco ClamAV: 1.3.0, 1.3.0-rc, 1.3.0-rc2

References

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

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