The default configuration of Sun ONE/iPlanet Web Server 4.1 SP1 through SP12 and 6.0 SP1 through SP5 responds to the HTTP TRACE request, which can allow remote attackers to steal information using cross-site tracing (XST) attacks in applications that are vulnerable to cross-site scripting.
http://www.kb.cert.org/vuls/id/867593
http://archive.cert.uni-stuttgart.de/uniras/2004/02/msg00007.html