Note: This is an archival copy of Security Sun Alert 200255 as previously published on http://sunsolve.sun.com.|
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1000200.1.
Date of Resolved Release
A vulnerability in Java Web Start
A vulnerability in Java Web Start may allow an untrusted application the ability to elevate its privileges. As a result, 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.
Sun acknowledges, with thanks, Jouko Pynnonen for bringing this issue to our attention.
2. Contributing Factors
This issue can occur in Java Web Start in the following J2SE releases:
Note: Java Web Start in J2SE 5.0 and later and J2SE releases prior to 1.4.2 for Windows, Solaris and Linux are not affected by this issue. Java Web Start 1.0.1_02 and earlier are also not affected.
To determine the version of Java on a system, run the following command:
% java -fullversion java full version "1.4.2_06-b01"
There are no reliable symptoms that would indicate the described issue has been exploited.
To work around the described issue, disable Java Web Start applications from being launched from a web browser as follows:
For Internet Explorer:
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:
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:
Solaris (if installed using pkg):
Linux (if installed using rpm):
This issue is addressed in Java Web Start in the following J2SE releases:
J2SE releases are available for download at the following links:
Note: It is recommended that affected versions be removed from your system. For more information, please see the installation notes on the respective java.sun.com download pages.
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Java Web Start 1.0
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