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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
Impact: Delete Arbitrary Files
Modify Arbitrary Files
Access: Existing Account
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
* 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
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,
* 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
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.
There are no predictable symptoms that would indicate that the above
issue is being exploited.
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
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
4. Select "application/x-java-jnlp-file" and click the "Remove"
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:
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:
JDK and JRE 6:
JDK and JRE 5:
SDK and JRE 1.4.2:
Solaris (if installed using pkg):
Linux (if installed using rpm):
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
* SDK and JRE 1.3.1_21 or later
JDK and JRE 6 Update 3 is available for download at the following
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
* Java SE 6_x86 update 3 (as delivered in patch 125138-04 or
* Java SE 6_x86 update 3 (as delivered in patch 125139-04 or
JDK and JRE 5.0 Update 13 is available for download at the following
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
SDK and JRE 1.4.2 is available for download at:
SDK and JRE 1.3.1 for Solaris 8 is available for download at:
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:
* 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
notification may only be used for the purposes contemplated by these
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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