Cisco Global Site Selector Appliances DNS Vulnerability
The Cisco GSS platform allows customers to leverage global content deployment across multiple distributed and mirrored data locations, optimizing site selection, improving Domain Name System (DNS) responsiveness, and ensuring data center availability.
The GSS is inserted into the traditional DNS hierarchy and is closely integrated with the Cisco CSS, Cisco Content Switching Module (CSM), or third-party server load balancers (SLBs) to monitor the health and load of the SLBs in customers data centers. The GSS uses this information and user-specified routing algorithms to select the best-suited and least-loaded data center in real time.
A vulnerability exists in the GSS when processing a specific sequence of DNS requests. An exploit of the vulnerability may result in a crash of the DNS service on the GSS.