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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
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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
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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
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