Cisco IOS Authentication Request Processing Denial of Service Vulnerability

Cisco IOS contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service (DoS) condition.

The vulnerability is due to improper handling of web authentication requests. An authenticated, remote attacker could exploit the vulnerability by sending malicious authentication requests to the affected software. Successful exploitation could cause a DoS condition.

Cisco has confirmed the vulnerability and released software updates.

To exploit the vulnerability, authentication is required, and an attacker may require access to networks adjacent to a targeted device. These requirements increase the difficulty of exploitation.