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Microsoft Windows Virtual DOS Machine (VDM) contains null pointer dereference

Vulnerability Note VU#783748

Original Release Date: 2004-04-14 | Last Revised: 2004-04-14


Microsoft Windows NT4.0 and Windows 2000 contain a vulnerability that could permit a local user to gain elevated privileges on the system.


Microsoft Windows NT4.0 and Windows 2000 provide an Virtual DOS Machine (VDM) to support 16-bit legacy operations and applications. A vulnerability in the implementation of the VDM may lead to the dereferencing of a NULL pointer. This situation occurs when 16-bit code is executed without first initializing a VDM.

For more details, please see Microsoft Security Bulletin MS04-011 and eEye Digital Security Advisory [AD20040413E].


A local user may be able to gain elevated privileges on the system.


Apply a patch from the vendor

Microsoft Security Bulletin MS04-011 contains patch information to resolve this issue.

Vendor Information


Microsoft Corporation Affected

Updated:  April 14, 2004



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Microsoft Security Bulletin MS04-011 contains information regarding this issue.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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Thanks to Microsoft and eEye Digital Security for reporting this vulnerability.

This document was written by Jason A Rafail.

Other Information

CVE IDs: CVE-2004-0118
Severity Metric: 8.66
Date Public: 2004-04-13
Date First Published: 2004-04-14
Date Last Updated: 2004-04-14 15:06 UTC
Document Revision: 3

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