1. UNIX has not traditionally been intended as a desktop operating system, and therefore has lacked many of the features of Windows and Macintosh PCs. CDE is a standard supported by numerous UNIX vendors to supply a common desktop environment on top of X Windows and RPC. Of interest to hackers are the following, services: ToolTalk rpc.ttdbd Provides the core of most "desktop" services. Provides an inter-application communication library that can be linked to applications. ToolTalk has had two major remote exploits providing root access. In 1999, a buffer-overflow was discovered. In 2001, a format-string exploit was discovered. Both resulted in widespread compromises. From Hacking-Lexicon