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Microsoft Word 2000 malformed record vulnerability

Vulnerability Note VU#806548

Original Release Date: 2006-09-07 | Last Revised: 2006-10-10


Microsoft Word 2000 contains a memory corruption vulnerability. This vulnerability could allow a remote, unauthenticated attacker to execute arbitrary code with the privileges of the user running Word 2000.


Microsoft Word 2000 fails to properly handle malformed records leading to memory corruption. For more information refer to Microsoft Security Bulletin MS06-060.

Note that we have received reports that this vulnerability is actively being exploited.


By convincing a user to open a specially crafted Word document, an attacker could execute arbitrary code with the privileges of the user running Word 2000. If the user is logged in with administrative privileges, the attacker could take complete control of a vulnerable system.


Apply an update
This vulnerability is addressed in Microsoft Security Bulletin MS06-060.

Do not open untrusted Word documents

Do not open unfamiliar or unexpected Word or other Office documents, particularly those hosted on web sites or delivered as email attachments. Please see Cyber Security Tip ST04-010 for more information.

Do not rely on file name extension filtering

In most cases, Windows will call Word to open a document even if the document has an unknown file extension. For example, if document.qwer contains the correct file header information, Windows will open document.qwer with Word. Filtering for common extensions (e.g., .doc, .dot, .rtf) may not detect all Word documents.

Vendor Information


Microsoft Corporation Affected

Notified:  September 05, 2006 Updated: October 10, 2006



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.


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

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This vulnerability was reported by Juha-Matti Laurio.

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-4534
Severity Metric: 25.06
Date Public: 2006-09-05
Date First Published: 2006-09-07
Date Last Updated: 2006-10-10 19:51 UTC
Document Revision: 34

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