Summary
distcc is a program to distribute builds of C, C++, Objective C or Objective C++ code across several machines on a network. distcc should always generate the same results as a local build, is simple to install and use, and is often two or more times faster than a local compile.
distcc by default trusts its clients completely that in turn could allow a malicious client to execute arbitrary commands on the server.
For more information about DistCC's security see:
http://distcc.samba.org/security.html