Cisco Adaptive Security Appliance Management Connections Denial of Service Vulnerability

A vulnerability in the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause an affected system to become unresponsive to management session requests via SSH, Telnet, HTTP, and HTTPS.

The vulnerability is due to a memory leak in the connection manager code when management flows are created. An attacker could exploit this vulnerability by creating several management session requests.

Cisco has confirmed the vulnerability in a security notice and released software updates.

To exploit this vulnerability, an attacker may need access to trusted internal networks, in which the targeted device may reside, to create management session requests. This access requirement may likely reduce the possibility 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.