Microsoft KB Archive/240346

= Malicious Java Applet May Be Able to Read, Write, or Delete Files on the Computer of a Web Site Visitor =

Article ID: 240346

Article Last Modified on 1/25/2007

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APPLIES TO


 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 Service Pack 2
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Windows 98 Second Edition

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This article was previously published under Q240346





SYMPTOMS
A scenario has been identified through which a Java applet can operate outside the bounds set by the sandbox and perform normally unauthorized functions on your computer. Exploiting the vulnerability is only possible through a very carefully managed series of steps, and cannot happen accidentally. However, if a malicious Web site operator hosts a Java applet that exploits this security vulnerability, it could read, write, or delete files on your computer when you visit the site.



RESOLUTION
A supported fix that corrects this problem has been posted to the following Internet location:

http://www.microsoft.com/mscorp/java



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem has been corrected in build 3234 of the Microsoft Virtual Machine (VM) that is included with Internet Explorer version 5.01.

NOTE: JVIEW in Windows 2000 displays the build number as 3229.



MORE INFORMATION
For more information, please see the following Microsoft Security Bulletin:

http://www.microsoft.com/security/bulletins/ms99-031faq.asp

For additional security-related information about Microsoft products, please go to:

http://www.microsoft.com/security/

Additional query words: ie Patch Available for "Virtual Machine Sandbox" Vulnerability

Keywords: kbbug kbfix KB240346

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