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             AUSCERT External Security Bulletin Redistribution

               ESB-2005.0310 -- Sun Alert Notification 57760
        Sun Java System Web Server Denial-of-Service Vulnerability
                               15 April 2005

===========================================================================

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

Product:           Sun Java System Web Server 6.0 Service Pack 7 and prior
Publisher:         Sun Microsystems
Operating System:  Windows
Impact:            Denial of Service
Access:            Remote/Unauthenticated

Original Bulletin: 
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57760-1

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   Sun(sm) Alert Notification 
     * Sun Alert ID: 57760
     * Synopsis: Sun Java System Web Server Denial-of-Service
       Vulnerability
     * Category: Security
     * Product: Sun Java System Web Server
     * BugIDs: 4852204
     * Avoidance: Upgrade
     * State: Resolved
     * Date Released: 13-Apr-2005
     * Date Closed: 13-Apr-2005
     * Date Modified:

   1. Impact A vulnerability in certain releases of the Sun Java System
   Web Server (formerly Sun ONE Web Server and iPlanet Web Server) may
   allow a remote user to cause the web server to become unresponsive,
   causing a Denial-of-Service (DOS) condition.

   2. Contributing Factors This issue can occur in the following
   releases:

     * Sun Java System Web Server 6.0 Service Pack 7 and earlier (Windows
       platforms only)

   Notes:

    1. Sun Java System Web Server versions 6.1.x are not affected by this
       issue.
    2. This issue only affects Sun Java System Web Servers running on the
       Windows platform.

   3. Symptoms The server becomes unresponsive.

   Solution Summary [2]Top

   4. Relief/Workaround To work around the described issue, sites may
   wish to temporarily disable Java "globally" for a particular webserver
   instance, by doing the following:

   1. To start an Admin Server instance, open a Windows command prompt
   and use the command line to start or stop an Admin Server, as in the
   following example:

   1) Change to the installation directory for the Web Server Admin
   Server. For example, using the default directory:

    % cd \Sun\jstudio_04Q4\WebServer6_2004q1\https-admserv

   2) Start the Web Server Admin Server process:

    % startsvr.bat

   or,

   1. Use the menu from the "Start" then "Programs" selections, or
   Double-click the "Start Web Server Administration Server" icon (if
   installed on the Desktop), then:

   2. Log in to the admin tool by going to the http://<hostname>:<port>

   3. Select the Admin Server instance and click the "Manage" button.

   4. Click the "Java" tab and open the "Enable/Disable Servlet/JSP" link

   5. Uncheck "Enable Java Globally"

   6. Click "OK" and "Apply All Changes" then restart the instance

   Note: If you disable Java in this fashion, you will no longer be able
   to run Java applications and it will be necessary to upgrade to the
   latest service pack. Please use the link below for Service Pack
   download information.

   5. Resolution This issue is addressed in the following releases:

     * Sun Java System Web Server 6.0 Service Pack 8 and later

   Sun Java System Web Server 6.0 Service Pack 8 is available for
   download at
   [3]http://wwws.sun.com/software/download/products/40968fe6.html.

   This Sun Alert notification is being provided to you on an "AS IS"
   basis. This Sun Alert notification may contain information provided by
   third parties. The issues described in this Sun Alert notification may
   or may not impact your system(s). Sun makes no representations,
   warranties, or guarantees as to the information contained herein. ANY
   AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
   WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
   NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
   YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
   INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
   OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
   This Sun Alert notification contains Sun proprietary and confidential
   information. It is being provided to you pursuant to the provisions of
   your agreement to purchase services from Sun, or, if you do not have
   such an agreement, the Sun.com Terms of Use. This Sun Alert
   notification may only be used for the purposes contemplated by these
   agreements.

   Copyright 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved.



      [4]SunSolve Feedback   |   [5]Company Info   |   [6]Contact   |
   [7]Terms of Use   |   [8]Privacy   |   Version 5.12.0    [9]Copyright
             © 2005 Sun Microsystems, Inc. All rights reserved.

References

   1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57760-1#top
   2. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57760-1#top
   3. http://wwws.sun.com/software/download/products/40968fe6.html
   4. http://sunsolve.sun.com/pub-cgi/feedback.pl
   5. http://www.sun.com/company/
   6. http://www.sun.com/contact/
   7. http://www.sun.com/share/text/termsofuse.html
   8. http://www.sun.com/privacy/
   9. javascript:popPage('/copyright.html',500,300)

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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===========================================================================

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