Cisco ASA Software Local Certificate Authority Denial of Service Vulnerability

A vulnerability in the local Certificate Authority (CA) feature of Cisco ASA Software could allow an unauthenticated, remote attacker to cause a reload of the affected system.

The vulnerability is due to improper handling of crafted packets during the enrollment operation. An attacker could exploit this vulnerability by sending a crafted enrollment request to the affected system. An exploit could allow the attacker to cause the reload of the affected system.

Note: Only HTTPS packets directed to the Cisco ASA
interface, where the local CA is allowing user enrollment, can be used to trigger this
vulnerability. This vulnerability affects
systems configured in routed firewall mode and in single
or
multiple context mode.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-ca[“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161019-asa-ca”]