Denial of Service Vulnerability in ClamAV's UDF Processing
CVE-2025-20234

5.3MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Secure Endpoint
Vendor
CVE Published:
18 June 2025

Badges

👾 Exploit Exists

What is CVE-2025-20234?

A vulnerability within the Universal Disk Format (UDF) processing in ClamAV allows unauthenticated remote attackers to exploit a memory overread issue during file scanning. By submitting a specially crafted UDF file for scanning, attackers may induce a denial of service condition, thereby terminating the ClamAV scanning process on affected devices. This can compromise the availability of the software, leaving systems vulnerable to further risks. Users of ClamAV should apply the relevant security patches to mitigate potential attacks.

Affected Version(s)

Cisco Secure Endpoint 7.0.5

Cisco Secure Endpoint 6.2.19

Cisco Secure Endpoint 7.3.3

References

https://sec.cloudapps.cisco.com/security/center/content/C...
https://blog.clamav.net/2025/06/clamav-143-and-109-securi...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-20234 : Denial of Service Vulnerability in ClamAV's UDF Processing