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Microsoft Windows Media Format Runtime ASF handling buffer overflow

Vulnerability Note VU#319385

Original Release Date: 2007-12-12 | Last Revised: 2007-12-13


Microsoft Windows Media Format Runtime is vulnerable to a heap-based buffer overflow. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code on an vulnerable system.


Microsoft Windows Media Format Runtime is used by various Windows Media applications such as Windows Media Player. The Windows Media Format Runtime includes the ability to play Advanced Systems Format (ASF) files, which can contain streaming audio, video, slide shows and synchronized events. A heap-based buffer overflow exists due to Microsoft Windows Media Format Runtime's improper parsing of ASF files. By successfully persuading a user to access a specially crafted ASF file, a remote, unauthenticated attacker could trigger the buffer overflow.


A remote, unauthenticated attacker could execute arbitrary code on a vulnerable system.


Microsoft has published Microsoft Security Bulletin MS07-068 in response to this issue. Users are strongly encouraged to review this bulletin and apply the referenced patches.

In addition to the patches referenced above, Microsoft has published workarounds for this issue. Users who are unable to apply the patches are strongly encouraged to implement these workarounds as appropriate.

Vendor Information


Microsoft Corporation Affected

Updated:  December 12, 2007



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 has published Microsoft Security Bulletin MS07-068 in response to this issue.

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

CVSS Metrics

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Microsoft credits Ryan Smith of ISS X-Force for reporting this vulnerability.

This document was written by Joseph W. Pruszynski.

Other Information

CVE IDs: CVE-2007-0064
Severity Metric: 14.73
Date Public: 2007-12-11
Date First Published: 2007-12-12
Date Last Updated: 2007-12-13 13:51 UTC
Document Revision: 17

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