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.
Apache Tomcat 4.0.1 allows remote attackers to obtain the web root path via HTTP requests for JSP files preceded by (1) +/, (2) >/, (3) </, and (4) %20/, which leaks the pathname in an error message.
Tomcat 4.0 through 4.1.12, using mod_jk 1.2.1 module on Apache 1.3 through 1.3.27, allows remote attackers to cause a denial of service (desynchronized communications) via an HTTP GET request with a Transfer-Encoding chunked field with invalid values.
The default servlet (org.apache.catalina.servlets.DefaultServlet) in Tomcat 4.0.4 and 4.1.10 and earlier allows remote attackers to read source code for server files via a direct request to the servlet.