ZDI-11-125: Microsoft Office PowerPoint PersistDirectoryEntry Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-125

April 12, 2011

-- CVE ID:
CVE-2011-0656

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
Microsoft

-- Affected Products:
Microsoft Office PowerPoint

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10885. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Microsoft Office PowerPoint. User
interaction is required to exploit this vulnerability in that the target
must visit a malicious page or open a malicious file.

The specific flaw exists within how the application handles an exception
within the PersistDirectoryEntry records when loading a presentation.
When an entry points to a container containing a Slide with a malformed
record, the application will raise an exception during the loading of
the record. Afterward the application will use a method off of this
malformed object which can lead to code execution under the context of
the application.

-- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More
details can be found at:

http://www.microsoft.com/technet/security/Bulletin/MS11-022.mspx

-- Disclosure Timeline:
2010-09-14 - Vulnerability reported to vendor
2011-04-12 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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