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Credit:
The information has been provided by Sean Larsson.
The original article can be found at: http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=793
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Vulnerable Systems:
* Microsoft PowerPoint 2000 SP3
* Microsoft PowerPoint 2002 (XP) SP3
* Microsoft PowerPoint 2003 SP2
* Microsoft PowerPoint 2003 SP3
* Microsoft PowerPoint 2007
* Microsoft PowerPoint 2007 SP1
* Microsoft PowerPoint Viewer 2003
The vulnerability occurs during the parsing of the BuildList record. This record is a container for other records that describe charts and diagrams in the PowerPoint file. By inserting multiple BuildList records with ChartBuild containers inside of them, it is possible to trigger a memory corruption vulnerability during the parsing of the ChartBuild container's contents. This allows an attacker to control an object pointer, which can lead to attacker supplied function pointers being dereferenced.
Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user opening the file. To exploit this vulnerability, an attacker needs to convince a user to open a malicious file. If the targeted user is running PowerPoint 2000, and the "Office Document Open Confirmation Tool" is not installed, then it is possible to exploit this vulnerability directly through the browser.
Due to the nature of the vulnerability, relatively precise control of the process memory layout is needed to successfully exploit this vulnerability. iDefense Labs has developed exploit code that successfully exploits this vulnerability.
Patch Availability:
Microsoft has released a patch which addresses this issue. For more information, consult their advisory at the following URL:
http://www.microsoft.com/technet/security/Bulletin/MS09-017.mspx
Workaround
Use Microsoft's moice tool to convert files to the new XML format.
CVE Information:
CVE-2009-0224
Disclosure Timeline:
10/06/2008 - Initial Contact
10/06/2008 - Initial Response
10/06/2008 - Researcher sent Inquiry to Vendor
10/07/2008 - Case number assigned
10/07/2008 - Initial resposne to Researcher Inquiry
12/12/2008 - Status Update Received - estimated release date 03/10/2009
02/24/2009 - Researcher restates Inquiry to Vendor
02/24/2009 - Status Update Received - estimated release date 06/09/2009
02/24/2009 - Vendor provides response to Inquiry
05/12/2009 - Coordinated Public Disclosure
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