Vulnerability Note VU#806548

Microsoft Word 2000 malformed record vulnerability

Overview

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.

I. Description

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.

II. Impact

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.

III. Solution

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.

Systems Affected

Vendor	Status	Date Updated
Microsoft Corporation	Vulnerable	10-Oct-2006

References

http://www.microsoft.com/technet/security/bulletin/ms06-060.mspx
http://www.microsoft.com/technet/security/advisory/925059.mspx
http://secunia.com/advisories/21735/
http://isc.sans.org/diary.php?storyid=1669&rss

Credit

This vulnerability was reported by Juha-Matti Laurio.

This document was written by Jeff Gennari.

Other Information

Date Public	09/05/2006
Date First Published	09/07/2006 07:43:27 AM
Date Last Updated	10/10/2006
CERT Advisory
CVE Name	CVE-2006-4534
US-CERT Technical Alerts
Metric	25.06
Document Revision	34

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Produced 2006 by US-CERT, a government organization
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