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Microsoft DirectShow buffer overflow

Vulnerability Note VU#995220

Original Release Date: 2005-10-11 | Last Revised: 2005-10-14


A buffer overflow in Microsoft DirectShow may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.


Microsoft DirectShow is a programming architecture for streaming multimedia on the Microsoft Windows platform. An input validation error in the DirectShow architecture may allow a buffer overflow to occur in applications or components that use DirectShow. If a remote, unauthenticated attacker supplies an application or component that uses DirectShow with a specially crafted media file, that attacker may be able to trigger the buffer overflow and, consequently, execute arbitrary code.

For more information, including a list of affected software, please see MS05-050.


By convincing a user to open a specially crafted media file with an application that uses DirectShow, an attacker may be able to execute arbitrary code with the privileges of the user.


Apply an update

Microsoft has addressed this issue in Microsoft Security Bulletin MS05-050.

Do not accept media files from untrusted sources

By only accessing media files, such as *.avi files, from trusted or known sources, the chances of exploitation are reduced.

Vendor Information


Microsoft Corporation Affected

Updated:  October 11, 2005



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.


Please see

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

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This vulnerability was reported by in Microsoft Security Bulletin MS05-050. Microsoft credits eEye Digital Security for reporting this vulnerability.

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2005-2128
Severity Metric: 14.70
Date Public: 2005-10-11
Date First Published: 2005-10-11
Date Last Updated: 2005-10-14 17:37 UTC
Document Revision: 29

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