Caucho Resin Windows Directory Traversal Vulnerability

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                        Rapid7 Security Advisory
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Rapid7 Advisory R7-0024
Caucho Resin Windows Directory Traversal Vulnerability

   Published:  May 16, 2006
   Revision:   1.0
   http://www.rapid7.com/advisories/R7-0024.html

   CVE:    CVE-2006-1953

1. Affected system(s):

   KNOWN VULNERABLE:
    o Caucho Resin v3.0.18 for Windows
    o Caucho Resin v3.0.17 for Windows

   NOT VULNERABLE:
    o Caucho Resin v3.0.19
    o Caucho Resin v3.0.16 and earlier

2. Summary

   The Caucho Resin web application server for Windows contains a
   directory traversal vulnerability that allows remote
   unauthenticated users to download any file from the system. It is
   possible to download files from any drive on the system.

   Rapid7 have updated NeXpose to check for this vulnerability. Licensed
   customers will receive the new vulnerability checks automatically.
   Visit http://www.rapid7.com to register for a free demo of NeXpose.

3. Vendor status and information

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

   Caucho was notified of this vulnerability on April 20th, 2006.
   They fixed this vulnerability in the latest unofficial snapshot
   of Resin 3.0.19, available from Caucho's website.

4. Solution

   Upgrade to the latest snapshot version of Resin, version 3.0.19.

5. Detailed analysis

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

      http://victim:8080/C:%5C/

   to access the root of the C: drive (and any files below it). Any
   drive letter can be specified.  Only Resin on Windows is vulnerable.

   This vulnerability appears to have been introduced in Resin
   version 3.0.17, although this has not been confirmed by the vendor.

6. Contact Information

   Rapid7 Security Advisories
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   Web:    http://www.rapid7.com/
   Phone:  +1 (617) 603-0700

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   hereby granted to redistribute this advisory, providing that no
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   remain intact.