Vulnerability in Microsoft PowerPoint security update

[Damiano]

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In Microsoft PowerPoint 2000 or Microsoft PowerPoint 2002, you try to open a presentation that uses the Microsoft PowerPoint 4.0 format. However, the presentation does not open, and you receive the following error message:
This file has an older format that isn’t supported.

Because of security issues with the parsing code that is used to open and to save PowerPoint 4.0 presentations, this security update removes the ability to open these files.

This issue occurs after you install the MS09-017 security update. This security update addressed vulnerabilities in the parsing code that was used to open and save PowerPoint file format types by preventing Microsoft Office PowerPoint 2000 and Microsoft Office PowerPoint 2002 from opening PowerPoint 4.0 native file formats.

By default, this behavior is turned on in Microsoft Office 2003 Service Pack 3. Microsoft Office PowerPoint 2003 will not open presentations that have the PowerPoint 4.0 file format. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
938810 Information about certain file types that are blocked after you install Office 2003 Service Pack 3

check here http://support.microsoft.com/kb/970980

[Damiano]

Microsoft Security Advisory (969136)
Vulnerability in Microsoft Office PowerPoint Could Allow Remote Code Execution.
Version: 2.0

Microsoft has completed the investigation into a public report of this vulnerability. they have issued MS09-017 to address this issue. For more information about this issue, check here

also check Microsoft Security Bulletin Summary for May 2009