Cisco ClamAV 1.3 HTML Parser input behavior

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco ClamAV 1.3. Affected is an unknown function of the component HTML Parser. This manipulation causes input behavior. This vulnerability is registered as CVE-2024-20380. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in Cisco ClamAV 1.3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component HTML Parser. The manipulation with an unknown input leads to a input behavior vulnerability. The CWE definition for the vulnerability is CWE-475. The behavior of this function is undefined unless its control parameter is set to a specific value. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at blog.clamav.net. This vulnerability is known as CVE-2024-20380 since 11/08/2023. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2025).

The vulnerability scanner Nessus provides a plugin with the ID 214890 (SUSE SLES12 Security Update : clamav (SUSE-SU-2025:0328-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (214890). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Anti-Malware Software

Vendor

• Cisco

Name

• ClamAV

Version

• 1.3

License

• free

Website

• Vendor: https://www.cisco.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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