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                                    CERT-Renater

                         Note d'Information No. 2007/VULN015
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DATE                      : 19/01/2007

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Sun JRE.

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Sun(sm) Alert Notification
     * Sun Alert ID: 102760
     * Synopsis: Security Vulnerability in Processing GIF Images in the
       Java Runtime Environment May Allow an Untrusted Applet to Elevate
       Privileges
     * Category: Security
     * Product: Java 2 Platform, Standard Edition
     * BugIDs: 6445518
     * Avoidance: Patch, Upgrade
     * State: Resolved
     * Date Released: 16-Jan-2007
     * Date Closed: 16-Jan-2007
     * Date Modified:

1. Impact

   A buffer overflow vulnerability in processing GIF images in the Java
   Runtime Environment may allow an untrusted applet to elevate its
   privileges. For example, an applet may grant itself permissions to
   read and write local files or execute local applications with the
   privileges of the user running the untrusted applet.

   Sun acknowledges with thanks, an anonymous researcher working with the
   Zero Day Initiative (http://www.zerodayinitiative.com/) and
   TippingPoint (http://www.tippingpoint.com) for bringing this issue
   to our attention.

2. Contributing Factors

   This issue can occur in the following releases (for Windows, Solaris,
   and Linux):
     * JDK and JRE 5.0 Update 9 and earlier
     * SDK and JRE 1.4.2_12 and earlier
     * SDK and JRE 1.3.1_18 and earlier

   To determine the default version of the JRE on a system for Solaris
   and Linux, the following command can be run:
    % 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.

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 the Resolution section below.

5. Resolution

   This issue is addressed in the following releases (for Windows,
   Solaris, and Linux):
     * JDK and JRE 5.0 Update 10 or later
     * SDK and JRE 1.4.2_13 or later
     * SDK and JRE 1.3.1_19 or later

   J2SE 5.0 is available for download at the following links:
     * http://java.sun.com/javase/downloads/index_jdk5.jsp
     * http://java.com

   J2SE 5.0 Update 10 for Solaris is available in the following patches:
     * J2SE 5.0: update 10 (as delivered in patch 118666-10)
     * J2SE 5.0: update 10 (as delivered in patch 118667-10 (64bit))
     * J2SE 5.0_x86: update 10 (as delivered in patch 118668-10)
     * J2SE 5.0_x86: update 10 (as delivered in patch 118669-10
       (64bit))

   J2SE 1.4.2 is available for download at:
     * http://java.sun.com/j2se/1.4.2/download.html

   J2SE 1.3.1 is available for download at:
     * http://java.sun.com/j2se/1.3/download.html

   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.

   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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