MS09-028: Vulnerabilities in Microsoft DirectShow could allow remote code execution

View products that this article applies to.

INTRODUCTION

Microsoft has released security bulletin MS09-028. To view the complete security bulletin, visit one of the following Microsoft Web sites:

Home users:
http://www.microsoft.com/protect/computer/updates/bulletins/200907.mspx (http://www.microsoft.com/protect/computer/updates/bulletins/200907.mspx)
Skip the details: Download the updates for your home computer or laptop from the Microsoft Update Web site now:
http://update.microsoft.com/microsoftupdate/ (http://update.microsoft.com/microsoftupdate/)
IT professionals:
http://www.microsoft.com/technet/security/bulletin/MS09-028.mspx (http://www.microsoft.com/technet/security/bulletin/MS09-028.mspx)

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How to obtain help and support for this security update

For home users, no-charge support is available by calling 1-866-PCSAFETY in the United States and Canada or by contacting your local Microsoft subsidiary. For more information about how to contact your local Microsoft subsidiary for support issues with security updates, visit the Microsoft International Support Web site:

http://support.microsoft.com/common/international.aspx?rdpath=4 (http://support.microsoft.com/common/international.aspx?rdpath=4)

North American customers can also obtain instant access to unlimited no-charge e-mail support or to unlimited individual chat support by visiting the following Microsoft Web site:

http://support.microsoft.com/oas/default.aspx?&prid=7552 (http://support.microsoft.com/oas/default.aspx?&prid=7552)

For enterprise customers, support for security updates is available through your usual support contacts.

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MORE INFORMATION

Known issues with this security update

The computer is not protected if you apply an incorrect version of this security update
If you manually download and then apply an incorrect version of this security update, the computer will not be protected. For example, consider the following scenario:
1. You previously upgraded the in-box DirectX component on a computer that is running Windows 2000 or Windows XP to a newer version of DirectX. For example, you upgraded the default version of DirectX version 7 in Windows 2000 to DirectX version 8 or 9.
2. You manually download the update for DirectX version 7 from the Microsoft download center, and then you installed it on the affected computer.
In this scenario, the update installs successfully. However, the vulnerable binary is not replaced. Therefore, the computer remains in a vulnerable condition.

We recommend that you run the DirectX Diagnostic Tool to determine the version of DirectX that you are running to verify that you download the correct version of this security update. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
157730 (http://support.microsoft.com/kb/157730/ ) How to Determine the Version of DirectX Using the DirectX Diagnostic Tool
The Quartz.dll file appears as an unsigned binary
Consider the following scenario:
- You install this update on a computer that is running Microsoft Windows 2000 with Service Pack 4 and that has DirectX 7 or DirectX 8 installed.
- You upgrade the system to DirectX 8 or DirectX 9.
- You try to update the system again with this update.
In this scenario, the Quartz.dll file is successfully updated to the secured version. However, the file may appear as an unsigned binary.

To avoid this issue, follow these steps:
1. Uninstall the update for the earlier version of DirectShow.
2. Manually delete the following catalog file:
  %systemroot%\system32\catroot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\KB971633.cat
3. Upgrade to the newer version of DirectShow.
4. Install the security update that is appropriate for the new version of DirectX.

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FILE INFORMATION

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

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