Cisco cBR-8 Converged Broadband Router vty Integrity Vulnerability

A vulnerability in Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause a configuration integrity change to the vty line configuration on an affected device.

The vulnerability is due to a logic processing error that exists if an affected device is configured with the Downstream Resiliency and Downstream Resiliency Bonding Group features. An attacker could exploit this vulnerability by continuously trying to establish Telnet or SSH connections to a targeted device. A successful exploit could allow the attacker to trigger an integrity issue with the vty line configuration.

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-20161012-cbr-8[“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161012-cbr-8”]