-----BEGIN PGP SIGNED MESSAGE-----

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                ESB-2003.0548 -- Sun(sm) Alert Notification
      Security Vulnerability in SSL/TLS Block Ciphers May Affect Sun
               ONE/iplanet Web Server and Application Server
                              07 August 2003

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

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

Product:                Sun ONE/iPlanet Web Server
                        Sun ONE Application Server
Publisher:              Sun Microsystems
Operating System:       Sun Solaris
                        Sun Linux
                        Red Hat Linux
                        HP-UX
                        AIX
                        Microsoft Windows
Impact:                 Access Confidential Data
Access Required:        Remote

Comment: Original bulletin:

          http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F54147

- --------------------------BEGIN INCLUDED TEXT--------------------


   DOCUMENT ID: 54147
   SYNOPSIS: Security Vulnerability in SSL/TLS Block Ciphers May Affect
   Sun ONE/iplanet Web Server and Application Server
   DETAIL DESCRIPTION:
   
Sun(sm) Alert Notification

     * Sun Alert ID: 54147
     * Synopsis: Security Vulnerability in SSL/TLS Block Ciphers may
       affect Sun ONE/iPlanet Web Server and Application Server
     * Category: Security
     * Product: Sun ONE/iPlanet Web Server, Sun ONE Application Server
     * BugIDs: 4828761
     * Avoidance: Workaround, Upgrade
     * State: Resolved
     * Date Released: 06-May-2003, 08-May-2003, 05-Aug-2003
     * Date Closed: 05-Aug-2003
     * Date Modified: 08-May-2003, 05-Aug-2003
       
1. Impact

   In Sun ONE Application Server or Sun ONE/iPlanet Web Server, it may be
   possible under certain circumstances to gather information about the
   data transmitted over a Secure Sockets Layer (SSL) or a Transport
   Layer Security (TLS) channel. This vulnerability is due to the way
   error handling is implemented with Cipher Block Chaining (CBC) mode
   ciphers in SSL and TLS and has been described in:
        [1]http://www.mozilla.org/projects/security/pki/nss/news/vaudenay-cbc.h
tml

   The described issue does not expose private or session keys. This
   issue primarily affects TLS rather than SSL version 3.
   
2. Contributing Factors

   This issue may occur in the following releases:
     * Sun ONE/iPlanet Web Server 6.0 Service Pack 1 through 5
     * Sun ONE Application Server 7.0
       
   Note: All architectures and platforms are impacted by this issue.
   
   For supported architectures and OS versions see:
     * Web Server 6.0
       [2]http://wwws.sun.com/software/products/web_srvr/home_web_srvr.ht
       ml
     * App Server 7.0
       [3]http://wwws.sun.com/software/products/appsrvr/home_appsrvr.html
        
       
3. Symptoms

   There are no visible symptoms that would show the described issue has
   been exploited.
   
   SOLUTION SUMMARY:
   
4. Relief/Workaround

   To workaround the descibed issue follow the steps below:
   
   Sun ONE/iPlanet Web Server 6.0 Service Pack 1 through 5
   
   Disable TLS or disable the following ciphers :
        Fortezza with 80 bit encryption and SHA message authentication
        DES with 56 bit encryption and SHA message authentication
        RC2 with 40 bit encryption and MD5 message authentication
        (FIPS) Triple DES with 168 bit encryption and SHA message authenticatio
n
        (FIPS) DES with 56 bit encryption and SHA message authentication
        Triple DES with 168 bit encryption and SHA message authentication


   To Disable TLS or disable the above ciphers:
        Login to the admin server and click on the instance to be managed
        Click on preferences -> Edit listen sockets
        Click on the attributes for the listen socket to be edited
        click on attributes
        click on SSL2 and SSL3/TLS to disable TLS or above mentioned ciphers


   Sun ONE Application Server 7.0
   
   Disable TLS or disable the following ciphers:
        rsa_3des_sha
        rsa_des_sha
        rsa_rc2_40_md5
        rsa_des_56_sha

   To disable TLS or disable the above ciphers:
        Login to the admin server and click on App server instances
        Click on the server to disable the TLS or ciphers
        Click on HTTP Server
        Click HTTP Listeners -http-listener-x and the values will be seen
        in the right frame

5. Resolution

   This issue is addressed in the following releases:
     * Sun ONE/iPlanet Web Server 6.0 Service Pack 6 and later
     * Sun ONE Application Server 7.0 Update Release 1 and later
       
   The above releases are available for download at:
   
   Sun ONE/iPlanet Web Server 6.0 Service Pack 6
     * [4]http://wwws.sun.com/software/download/products/3f186391.html
       
   Sun ONE Application Server 7.0 Update Release 1
     * Standard Edition:
       [5]http://wwws.sun.com/software/download/products/3ec3e772.html 
     * Platform Edition:
       [6]http://wwws.sun.com/software/download/products/3ec1008e.html
       
Change History

   08-May-2003:
     * Updated Contributing Factors
       
   05-Aug-2003:
     * State: Resolved
     * Updated Resolution section
       
   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, th! e Sun.com Terms of Use. This Sun Alert
   notification may only be used for the purposes contemplated by these
   agreements.
   
   Copyright 2000-2003 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved.
   

References

   Visible links
   1. http://www.mozilla.org/projects/security/pki/nss/news/vaudenay-cbc.html
   2. http://wwws.sun.com/software/products/web_srvr/home_web_srvr.html
   3. http://wwws.sun.com/software/products/appsrvr/home_appsrvr.html
   4. http://wwws.sun.com/software/download/products/3f186391.html
   5. http://wwws.sun.com/software/download/products/3ec3e772.html
   6. http://wwws.sun.com/software/download/products/3ec1008e.html

   Hidden links:
   7. http://wwws.sun.com/software/producks/appsrvr/home_appsrvr.html

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business 
                hours which are GMT+10:00 (AEST).  On call after hours 
                for member emergencies only.
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQCVAwUBPzGg4yh9+71yA2DNAQGPbgP/diWueAF0lN/DzXvUTKSUTTSWev5zgbqT
z0NuTqZ6ZIYQecnNxRSeLq0EJpr/yKymjl35uWZw3Rj8Re4PeErWLaQ595wI03cg
vb/6MHraMxdpsgJMo7iU50zEGHZuQcJrb52Q7B3LL2TsZksxCjER830QD2UnO/PC
xZLxZ9nVLqc=
=vsXi
-----END PGP SIGNATURE-----