AUSCERT External Security Bulletin Redistribution
           ESB-2000.032 -- Microsoft Security Bulletin (MS00-011)
             Patch Available for "VM File Reading" Vulnerability
                              21 February 2000


Microsoft Corporation has released the following security bulletin
concerning in the Microsoft virtual machine (Microsoft VM) in Internet 
Explorer 4.x and Internet Explorer 5.x under Windows 9x and Windows NT.

There exists a vulnerability in the implementation of the Java "sandbox"
environment. The "sandbox" normally prevents Java applets from accessing 
resources outside the virtual environment of the Java Machine in a web 
browser on a visiting machine.

This vulnerability may enable a malicious web site operator to read files 
from the computer of a person who visited their site or read web content 
from inside an intranet if the malicious site is visited by a computer 
from within that intranet.

Microsoft have made a patch available which may eliminate this problem:



This security bulletin is provided as a service to AusCERT's members.
As AusCERT did not write the document referenced above, AusCERT has
had no control over its content.  The decision to use any or all
of this information is the responsibility of each user or organisation,
and should be done so in accordance with site policies and procedures.

If you have any questions or need further information, please contact 
Microsoft Corporation directly.

Previous advisories and external security bulletins can be retrieved from:


If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security

Internet Email: auscert@auscert.org.au
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