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AUSCERT External Security Bulletin Redistribution
ESB-2007.0127 -- [Win][Linux][Solaris]
Security Vulnerability in RSA Signature Verification Affects
Java 2 Platform, Standard Edition
22 February 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: Java 2 Platform, Standard Edition
Publisher: Sun Microsystems
Operating System: Linux variants
Solaris
Windows
Impact: Reduced Security
Access: Remote/Unauthenticated
CVE Names: CVE-2006-4339
Ref: ESB-2006.0728
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102686-1
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Sun(sm) Alert Notification
* Sun Alert ID: 102686
* Synopsis: Security Vulnerability in RSA Signature Verification
Affects Java 2 Platform, Standard Edition
* Category: Security
* Product: Java 2 Platform, Standard Edition
* BugIDs: 6466389, 6469538
* Avoidance: Upgrade
* State: Resolved
* Date Released: 15-Nov-2006, 15-Feb-2007
* Date Closed: 15-Feb-2007
* Date Modified: 15-Feb-2007
1. Impact
The Java Runtime Environment and the Java Secure Socket Extension may
verify incorrect RSA PKCS #1 v1.5 signatures if the RSA public key
exponent is 3. This may allow applets or applications that are signed
by forged signing certificates and web sites with forged web server
certificates to be verified as valid.
For information about this general issue, see:
* http://www.imc.org/ietf-openpgp/mail-archive/msg14307.html
* http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339
Note: The issue described in this Sun Alert is specific to the Java 2
Platform, Standard Edition. Multiple Sun products are affected by this
issue; for more details please see Sun Alert 102648 at:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102648-1
2. Contributing Factors
The issue can occur in the following releases (for Windows, Solaris,
and Linux):
* JDK and JRE 5.0 Update 8 and earlier
* SDK and JRE 1.4.2_12 and earlier
* JDK and JRE 1.3.1_19 and earlier
* Java Secure Socket Extension(JSSE) 1.0.3_03 and earlier
To determine the default version of the JRE on a system for Solaris
and Linux, the following command can be used:
% java -version
Note: The above command only determines the default version. Other
versions may also be installed on the system.
To determine the default version of the JRE on a system for Windows:
1. Click "Start"
2. Select "Run"
3. Type "cmd" (starts a command-line)
4. At the prompt, type "java -version"
Note: The above command only determines the default version. Other
versions may also be installed on the system.
To determine the version of JSSE 1.0.3_xx that is installed, first
locate the "jsse.jar" file. If the JSSE was installed as an "Installed
Extension", the jsse.jar will be found in
<java-home>/lib/ext/jsse.jar. If JSSE was installed as a "Bundled
Extension", search the application to determine the location of
jsse.jar.
Once the jsse.jar has been located, extract the MANIFEST.MF file using
the jar(1) command, for example:
% jar -xvf jsse.jar META-INF/MANIFEST.MF
inflated: META-INF/MANIFEST.MF
The implementation version number can then be obtained from the
MANIFEST.MF file using a command similar to the following:
% grep Implementation-Version META-INF/MANIFEST.MF
Implementation-Version: 1.0.3_04
Note: JSSE 1.0.3_xx should not be installed with JRE 1.4.x or later.
3. Symptoms
There are no reliable symptoms that would indicate the described issue
has been exploited.
4. Relief/Workaround
There is no workaround. Please see Resolution section below.
5. Resolution
This issue is addressed in the following releases (for Windows,
Solaris, and Linux):
* JDK and JRE 5.0 Update 9 or later
* SDK and JRE 1.4.2_13 or later
* JSSE 1.0.3_04 or later
* SDK and JRE 1.3.1_20
J2SE 1.4.2 is available for download at:
* http://java.sun.com/j2se/1.4.2/download.html
J2SE 5.0 is available for download at the following links:
* http://java.sun.com/j2se/1.5.0/download.jsp
* http://java.com
J2SE 5.0 Update 9 for Solaris is available in the following patches:
* J2SE 5.0: update 9 (as delivered in patch 118666-09)
* J2SE 5.0: update 9 (as delivered in patch 118667-09 (64bit))
* J2SE 5.0_x86: update 9 (as delivered in patch 118668-09)
* J2SE 5.0_x86: update 9 (as delivered in patch 118669-09
(64bit))
JSSE 1.0.3_04 is available at:
* http://java.sun.com/products/jsse/index-103.html
J2SE 1.3.1 is available for download at:
* http://java.sun.com/products/archive/
Note: When installing a new version of the product from a source other
than a Solaris patch, it is recommended that the old affected versions
be removed from your system. For more information, please see the
installation notes on the respective java.sun.com download pages.
Change History
15-Feb-2007:
* 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, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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