Cisco Unified Communications Domain Manager High CPU Utilization Vulnerability

A vulnerability in Cisco Unified Communications Domain Manager Platform Software could allow an unauthenticated, remote attacker to cause high CPU utilization. The vulnerability is due to improper handling of crafted TCP packets. An attacker could exploit this vulnerability by sending crafted TCP packets at a high rate. An exploit could allow the attacker to cause high CPU utilization, which could impact operations of the affected system. Cisco has confirmed the vulnerability in a security notice; however, software updates are not available. To exploit this vulnerability, an attacker may need access to trusted, internal networks behind a firewall to send crafted TCP packets to the targeted device. This access requirement may reduce the likelihood of a successful exploit. Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

Administrators are advised to contact the vendor regarding future updates and releases.

Administrators are advised to allow only trusted users to have network access.

Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators are advised to monitor affected systems.