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             AUSCERT External Security Bulletin Redistribution

                    ESB-2008.0013 -- [Win][UNIX/Linux]
   Jetty fails to properly process URLs that contain double / characters
                              9 January 2008

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Mortbay Jetty
Publisher:            US-CERT
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact:               Access Confidential Data
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-6672

Original Bulletin:    http://www.kb.cert.org/vuls/id/553235

Revision History:     January 9 2008: Added CVE Reference
                      January 7 2008: Initial Release

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Vulnerability Note VU#553235
Jetty fails to properly process URLs that contain double / characters

Overview

        The Jetty webserver contains a vulnerability that may allow an 
        attacker to access private files or directories.

I. Description

        Jetty is a web server implemented in Java. Jetty contains a 
        vulnerability that occurs because Jetty will process URLs with 
        multiple / characters incorrectly. See the Jetty Double slash 
        problem bug report for more information.

II. Impact

        A remote unauthenticated attacker may be able view hidden or 
        private files and directories.

III. Solution

        Upgrade

        Jetty version 6.1.7 has been released to address this issue.

        Filter URLs

        Until updates can be applied, administrators may be able to use an 
        application firewall or reverse proxy server to filter "//" 
        characters in URLs.

Systems Affected

Vendor          Status          Date Updated
Mort Bay        Vulnerable      3-Jan-2008

References

        http://jira.codehaus.org/browse/JETTY-386#action_117699
        http://jira.codehaus.org/browse/JETTY/fixforversion/13950
        http://www.visolve.com/squid/squid24s1/access_controls.php
        http://httpd.apache.org/docs/1.3/mod/mod_proxy.html

Credit

Thanks to Greg Wilkins for reporting this vulnerability and providing 
information that was used in this report.

This document was written by Ryan Giobbi.
Other Information
Date Public             12/28/2007
Date First Published    01/03/2008 10:07:35 AM
Date Last Updated       01/03/2008
CERT Advisory    
CVE Name         
Metric                  2.64
Document Revision       12

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