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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0752 -- [Win][Linux][Solaris] An Untrusted Java Web Start Application or Java Applet May Move or Copy Arbitrary Files by Requesting the User to Drag and Drop a File from Application or Applet Window to a Desktop Application 24 October 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: JDK and JRE 6 Update 2 and prior JDK and JRE 5.0 Update 12 and prior SDK and JRE 1.4.2_15 and prior SDK and JRE 1.3.1_20 and prior Publisher: Sun Microsystems Operating System: Windows Linux variants Solaris Impact: Delete Arbitrary Files Modify Arbitrary Files Access: Existing Account Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103072-1 Comment: This vulnerability requires the user to drag and drop a file from inside an applet or application to an application outside the applet. This can then allow arbitrary files to be moved or copied. Revision History: October 24 2007: Sun set status to Resolved October 5 2007: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Sun(sm) Alert Notification * Sun Alert ID: 103072 * Synopsis: An Untrusted Java Web Start Application or Java Applet May Move or Copy Arbitrary Files by Requesting the User to Drag and Drop a File from Application or Applet Window to a Desktop Application * Category: Security * Product: Java 2 Platform, Standard Edition * BugIDs: 6590857 * Avoidance: Patch, Upgrade, Workaround * State: Resolved * Date Released: 03-Oct-2007, 22-Oct-2007 * Date Closed: 22-Oct-2007 * Date Modified: 22-Oct-2007 1. Impact A vulnerability in the Java Runtime Environment may allow an untrusted Java Web Start application or Java applet to move or copy arbitrary files on the system that the application or applet runs on, by requesting the user of the application or applet to drag a file from the application or applet window to a desktop application that has permissions to accept and write files on the system. To exploit this vulnerability, the application or applet has to successfully persuade the user to drag and drop the file. 2. Contributing Factors This issue can occur in the following releases (for Windows, Solaris, and Linux): * JDK and JRE 6 Update 2 and earlier * JDK and JRE 5.0 Update 12 and earlier * SDK and JRE 1.4.2_15 and earlier * SDK and JRE 1.3.1_20 and earlier To determine the default version of the JRE that Internet Explorer uses: 1. Click "Tools" in the Menu Bar at the top of the browser 2. Select "Sun Java Console" 3. The first two lines in the console displays the version of Java Plug-in and JRE that Internet Explorer uses. To determine the default version of the JRE that Mozilla or Firefox browsers use, visit the URL "about:plugins". The browser will display a page called "Installed plug-ins" which lists the version of the Java Plug-in such as the following: Java(TM) Plug-in 1.5.0_11-b03 The above example indicates that the version of the JRE that the browser uses is 1.5.0_11. 3. Symptoms There are no predictable symptoms that would indicate that the above issue is being exploited. 4. Relief/Workaround To reduce the likelihood of executing untrusted applications which may allow this issue to be exploited, Java Web Start applications may be disabled temporarily (until the updates or patches have been installed) as follows: For Internet Explorer (Windows): 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 Note 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 through 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 Note 2: It is also possible to launch applications through the command line in Windows, Solaris, and Linux. Unknown applications should not be launched through 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: JDK and JRE 6: C:\Program Files\Java\jre1.6.0_03\bin\javaws.exe JDK and JRE 5: C:\Program Files\Java\jre1.5.0_13\bin\javaws.exe SDK and JRE 1.4.2: C:\Program Files\Java\j2re1.4.2_16\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 (for Windows, Solaris, and Linux): * JDK and JRE 6 Update 3 or later * JDK and JRE 5.0 Update 13 or later * SDK and JRE 1.4.2_16 or later This issue is addressed in the following release (for Solaris 8 and Windows): * SDK and JRE 1.3.1_21 or later JDK and JRE 6 Update 3 is available for download at the following links: http://java.sun.com/javase/downloads/index.jsp http://java.com JDK 6 Update 3 for Solaris is available in the following patches: * Java SE 6 update 3 (as delivered in patch 125136-04 or later) * Java SE 6 update 3 (as delivered in patch 125137-04 or later (64bit)) * Java SE 6_x86 update 3 (as delivered in patch 125138-04 or later) * Java SE 6_x86 update 3 (as delivered in patch 125139-04 or later (64bit)) JDK and JRE 5.0 Update 13 is available for download at the following link: http://java.sun.com/javase/downloads/index_jdk5.jsp JDK 5.0 Update 13 for Solaris is available in the following patches: * J2SE 5.0 update 13 (as delivered in patch 118666-14) * J2SE 5.0 update 13 (as delivered in patch 118667-14 (64bit)) * J2SE 5.0_x86 update 13 (as delivered in patch 118668-14) * J2SE 5.0_x86 update 13 (as delivered in patch 118669-14 (64bit)) SDK and JRE 1.4.2 is available for download at: http://java.sun.com/j2se/1.4.2/download.html SDK and JRE 1.3.1 for Solaris 8 is available for download at: http://java.sun.com/j2se/1.3/download.html SDK and JRE 1.3.1 have completed the Sun End of Life (EOL) process and is only supported for customers with Solaris 8 and Vintage Support Offering support contracts (see http://java.sun.com/j2se/1.3/download.html). Sun strongly recommends that users upgrade to the latest releases. 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. To remove old affected versions on the Windows platform please see: http://java.com/en/download/help/uninstall_java.xml Change History 22-Oct-2007: * Updated Resolution section * State: Resolved 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 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 iQCVAwUBRx6Ipyh9+71yA2DNAQIqIAP/cuuKxWb3jnzFHbLXerj7eKHPVcZcQjbh omIllzcfewhzdKi3drMOIfs2YnB8EipQWEK+MCffCqRa+OjQ4XUEsb7Fcu6wRgOR f7y3zPaIeSnMC/jaKq7goAWyJZM/XQddaIEu9KhyopRsvY2WYVutLftKZbGo8h2R 68+J1crKeJs= =uZ1g -----END PGP SIGNATURE-----