Rapid7 Security Advisory R7-0029: Caucho Resin Web Application Directory Traversal

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Rapid7 Advisory R7-0029
Caucho Resin Web Application Directory Traversal

   Published:  May 14, 2007
   Revision:   1.0
   http://www.rapid7.com/advisories/R7-0029

1. Affected system(s):

   KNOWN VULNERABLE:
    o Caucho Resin Professional v3.1.0 for Windows
    o Caucho Resin v3.1.0 for Windows
    o Caucho Resin v3.0.21 for Windows
    o Caucho Resin v3.0.20 for Windows
    o Caucho Resin v3.0.19 for Windows
    o Caucho Resin v3.0.18 for Windows
    o Caucho Resin v3.0.17 for Windows

   KNOWN FIXED:
    o Caucho Resin v3.1.1 for Windows
    o Caucho Resin Professional v3.1.1 for Windows

2. Summary

   The Caucho Resin web application server for Windows contains a
   directory traversal vulnerability that allows remote
   unauthenticated users to download files from a web application's
   hidden "WEB-INF" directory.  This directory typically contains sensitive
   server configuration files and compiled java source code.

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3. Vendor status and information

   Caucho Technology, Inc.
   http://www.caucho.com/

   Caucho was notified of this vulnerability on May 3rd, 2007.
   They fixed this vulnerability in the latest unofficial snapshot
   of Resin 3.1.1, available from Caucho's website.

4. Solution

   Upgrade to Caucho Resin 3.1.1 or later.

5. Detailed analysis

   Caucho Resin is a servlet and JSP server. Resin ships with its own
   stand-alone web server which runs by default on port 8080. Any remote
   user can request URLs of the form:

      http://victim:8080/%20..\web-inf

   to access the web-inf directory of the corresponding web application.
   Any known sub directory may also be specified.

6. Credit

   Discovered by Derek Abdine of Rapid7.

7. Contact Information

   Rapid7, LLC
   Email: advisory@rapid7.com
   Web: http://www.rapid7.com
   Phone: +1 (617) 247-1717

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   This information is subject to change without notice.

   This advisory Copyright (C) 2007 Rapid7, LLC. Permission is hereby
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