Cisco Video Communication Server and Expressway Trusted Certificate Authentication Bypass Vulnerability

A vulnerability in certificate management and validation for the Mobile and Remote Access (MRA) feature for Cisco Expressway Series and TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to bypass authentication and access internal HTTP system resources.

The vulnerability is due to lack of proper input validation of a trusted certificate. An attacker could exploit this vulnerability by connecting to the targeted device with a trusted certificate. An exploit could allow the attacker to bypass authentication and access internal HTTP system resources.

Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available.

This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160706-vcs[“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160706-vcs”]