A high-severity integer overflow vulnerability in the ClamAV parser of Cisco Secure Endpoint permits unauthenticated, remote attackers to cause memory corruption or denial of service.

The issue resides in the PESpin file format parser and is characterized by an integer overflow or wraparound (CWE-190). This flaw allows an unauthenticated, remote attacker to trigger memory corruption, which may result in a denial of service or other impacts on the device.

The ability for a remote, unauthenticated attacker to induce memory corruption creates a severe stability and potential security risk. With a CVSS score of 7.5, this vulnerability could be leveraged to disable security defenses, resulting in increased risk of unauthorized access or broader compromise during the period of service unavailability.

Immediate Action: Consult the Cisco security advisory referenced in the metadata and update the Cisco Secure Endpoint software to the latest secure version.

Proactive Monitoring: Review security logs for anomalous file parsing errors or service termination events.

Compensating Controls: Utilize perimeter security tools to inspect incoming files for malformed PESpin headers to prevent the exploit from reaching the endpoint agent.

Public Exploit Available: No

Because this vulnerability impacts a core security component, it is imperative that organizations apply the vendor-provided patches as soon as they become available. Failure to remediate could allow attackers to bypass endpoint security controls via targeted file-based attacks.