Authentication is not required to exploit this vulnerability.
The specific flaw exists within CA.Itm.Server.ManagementWS.dll. Due to a failure to properly sanitize user-controlled input, it is possible for a remote unauthenticated attacker to upload and subsequently execute arbitrary code under the context of the CA Total Defense Heartbeat Web service. Requests delivered to FileUploadHandler.ashx are subject to arbitrary file writes, including directory traversal attacks, in the GUID parameter. The Heartbeat Web service listens for HTTP requests on port 8008 and 44344 for HTTPS.