Buffer overflow in X11 library (libX11) on Caldera Open UNIX 8.0.0, UnixWare 7.1.1, and possibly other operating systems, allows local users to gain root privileges via a long -xrm argument to programs such as (1) dtterm or (2) xterm.
http://www.securityfocus.com/bid/4502
http://www.securityfocus.com/archive/1/249106
http://www.kb.cert.org/vuls/id/169059
http://www.iss.net/security_center/static/8828.php
http://www.iss.net/security_center/static/7282.php
http://archives.neohapsis.com/archives/bugtraq/2002-01/0099.html