===================================================================== CERT-Renater Note d'Information No. 2005/VULN380 _____________________________________________________________________ DATE : 15/06/2005 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running Java Web Start. ====================================================================== Sun(sm) Alert Notification * Sun Alert ID: 101748 * Synopsis: Security Vulnerability With Java Web Start * Category: Security * Product: Java 2 Platform, Standard Edition 5.0 Software * BugIDs: 6203504 * Avoidance: Upgrade, Workaround * State: Resolved * Date Released: 13-Jun-2005 * Date Closed: 13-Jun-2005 * Date Modified: 1. Impact A vulnerability in Java Web Start may allow an untrusted application to elevate its privileges. For example an application may grant itself permissions to read and write local files or execute local applications that are accessible to the user running the Java Web Start application. 2. Contributing Factors This issue can occur in the following releases: * Java Web Start in Java 2 Platform Standard Edition (J2SE) 5.0 and 5.0 Update 1 for Windows, Solaris and Linux Note: Java Web Start in J2SE releases prior to 5.0 for Windows, Solaris and Linux, and Java Web Start 1.0.1_02 and earlier are not affected by this issue. To determine the version of Java on a system, the following command can be run: % java -fullversion java full version "1.5.0_02-b09" 3. Symptoms There are no reliable symptoms that would indicate the described issue has been exploited. 4. Relief/Workaround To work around the described issue, disable Java Web Start applications from being launched from a web browser as follows: For Internet Explorer: 1. Right click on the "Start" button and select "Explore" 2. In the "Start Menu" window, select "Tools" => "Folder Options" 3. From the "Folder Options" window, select the "File Types" tab 4. From the "Registered File Types" window, scroll down and locate the "JNLP - JNLP File" 5. Select the "JNLP - JNLP File" and click the "Delete" button For Mozilla: 1. Select "Preferences" under the browser's "Edit" menu 2. In the "Preferences" window, select "Helper Applications" located under the "Navigator" category 3. Under "Files types", scroll down and locate "application/x-java-jnlp-file" 4. Select "application/x-java-jnlp-file" and click the "Remove" button Notes: 1. On Microsoft Windows, applications may also be launched from the desktop icon or Start Menu if a shortcut was previously created for an application. Unknown applications should not be launched from the desktop icon or the Start Menu. Shortcuts can be removed by using the Java Web Start Application Manager through the "Application/Remove Shortcut" menu item. For more information,see: http://java.sun.com/j2se/1.5.0/docs/guide/javaws/developersguide/ov erview.html#jws 2. It is also possible to launch applications from the command line in Windows, Solaris, and Linux. Unknown applications should not be launched from the command line. Sites may consider renaming the Java Web Start launcher ("javaws.exe" for Windows and "javaws" for Solaris and Linux) to prevent Java Web Start from launching. The launcher can be found at: Windows: C:\Program Files\java\j2re1.5.0\javaws\javaws.exe Solaris (if installed using pkg): /usr/bin/javaws Linux (if installed using rpm): /usr/java/jre1.5.0/bin/javaws 5. Resolution This issue is addressed in the following releases: * Java Web Start in Java 2 Platform Standard Edition (J2SE) 5.0 Update 2 and later for Windows, Solaris and Linux J2SE 5.0 is available for download at the following links: http://java.sun.com/j2se/1.5.0/download.jsp http://java.com Note: It is recommended that affected versions be removed from your system. For more information, please see the installation notes on the java.sun.com download page. 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 ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================