The default installation of Apache Tomcat 4.0 through 4.1 and 3.0 through 3.3.1 allows remote attackers to obtain the installation path and other sensitive system information via the (1) SnoopServlet or (2) TroubleShooter example servlets.
http://www.vupen.com/english/advisories/2008/1979/references
http://www.iss.net/security_center/static/8932.php
http://tomcat.apache.org/security-4.html
http://sunsolve.sun.com/search/document.do?assetkey=1-26-239312-1