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             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

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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
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   This Sun Alert notification contains Sun proprietary and confidential
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   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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