Microsoft PowerPoint 2002 SP3, 2003 SP3, and 2007 SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; and PowerPoint Viewer 2007 SP2 do not properly handle Office Art containers that have invalid records, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a PowerPoint document with a container that triggers certain access to an uninitialized object, aka "OfficeArt Atom RCE Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11978
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-022
http://zerodayinitiative.com/advisories/ZDI-11-044/
http://www.vupen.com/english/advisories/2011/0941
http://www.us-cert.gov/cas/techalerts/TA11-102A.html
http://www.securitytracker.com/id?1025340
http://www.securityfocus.com/archive/1/516233/100/0/threaded
http://secunia.com/advisories/43213
http://dvlabs.tippingpoint.com/blog/2011/02/07/zdi-disclosure-microsoft