Note: This is an archival copy of Security Sun Alert 233327 as previously published on http://sunsolve.sun.com.|
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1019022.1.
Date of Resolved Release
Buffer Overflow Vulnerability in Java Web Start May Allow an Untrusted application to Elevate its Privileges
1. ImpactA buffer overflow vulnerability in Java Web Start may allow an untrusted Java Web Start application that is downloaded from a website to elevate its privileges. For example, an untrusted Java Web Start application may grant itself permissions to read and write local files or execute local applications that are accessible to the user running the untrusted application.
Sun acknowledges with thanks, CERT/CC for bringing this issue to our attention.
2. Contributing FactorsThis issue can occur in the following releases (for Windows, Solaris, and Linux):
To determine the default version of the 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 indicates the version of the JRE the browser uses is 1.5.0_11.
3. SymptomsThere are no predictable symptoms that would indicate the above issue is being exploited.
4. WorkaroundTo reduce the likelihood of executing untrusted applications which may allow these issues 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):
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:
For Solaris (if installed using pkg):
For Linux (if installed using rpm):
5. ResolutionThis issue is addressed in the following releases (for Windows, Solaris, and Linux):
JRE 6 update 5 is available through the Java Update Tool for Microsoft Windows users.
JDK 6 Update 5 for Solaris is available in the following patches:
JDK 5.0 Update 15 for Solaris is available in the following patches:
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:
For more information on Security Sun Alerts, see 1009886.1.
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Sun Java Standard Edition (Java SE)
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