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CVE-2025-20234

ClamAV UDF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

Published: Jun 18, 2025Updated: Aug 11, 2025 Sources: CVE List NVD BDUCWE-125
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.7%
Top 53.2%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
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:LAvailability
Low
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Weaknesses

CWE-125

Affected Products

clamavclamav
On-premSecurity Product
Security Products / vuln-mgmt-scanner
secure endpointciscoNetworking Infrastructure
secure endpoint private cloudciscoNetworking Infrastructure
Secure Endpoint ConnectorCisco Systems Inc.Networking Infrastructure
Secure Endpoint Private CloudCisco Systems Inc.Networking Infrastructure
clamavoss-projectSecurity Productsaka clambc, clamav
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html
blog.clamav.net
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy
sec.cloudapps.cisco.com

Timeline

Published
Jun 18, 2025
Last Updated
Aug 11, 2025

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