Cisco Adaptive Security Appliance Software Crafter RADIUS Packets Denial of Service Vulnerability

A vulnerability in the implementation of the Remote Authentication Dial-in User Services (RADIUS) code of Cisco ASA Software could allow an authenticated, remote attacker to cause an affected system to reload.

The vulnerability is due to insufficient validation of RADIUS packets including crafted attributes. An attacker could exploit this vulnerability by sending crafted RADIUS packets to the affected system. The attacker must know the RADIUS shared secret and inject the crafted packet while a RADIUS exchange is in progress.

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

To exploit this vulnerability, an attacker must authenticate to the targeted system. 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.