Vulnerability Note VU#804089

Microsoft DirectX SAMI parsing buffer overflow

Overview

Microsoft DirectX is vulnerable to a stack-based buffer overflow. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Microsoft DirectX is a feature of the Microsoft Windows operating system used for streaming multimedia content. DirectX integrates DirectShow technology to provide high-quality capture of streaming media such as video and audio. A stack-based buffer overflow exists due to DirectShow's improper parsing of Synchonized Accessible Media Interchange (SAMI) files. By successfully persuading a user to access a specially crafted SAMI file, a remote, unauthenticated attacker could trigger the buffer overflow.

II. Impact

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

III. Solution

Microsoft has published Microsoft Security Bulletin MS07-064 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.

Systems Affected

Vendor	Status	Date Updated
Microsoft Corporation	Vulnerable	14-Dec-2007

References

http://www.microsoft.com/technet/security/bulletin/ms07-064.mspx

Credit

Microsoft credits Jun Mao of VeriSign iDefense Labs for reporting this vulnerability.

This document was written by Joseph W. Pruszynski.

Other Information

Date Public	12/11/2007
Date First Published	12/14/2007 11:11:07 AM
Date Last Updated	12/14/2007
CERT Advisory
CVE Name	CVE-2007-3901
Metric	7.25
Document Revision	8