CVE-2011-0656

PowerPoint 2002 SP3, 2003 SP3, 2007 SP2, y 2010; Office 2004, 2008, y 2011 para Mac; Open XML File Format Converter para Mac; Office Compatibility Pack para Word, Excel, y PowerPoint 2007 File Formats SP2; PowerPoint Viewer; PowerPoint Viewer 2007 SP2; y PowerPoint Web App, de Microsoft, no comprueba apropiadamente los registros de PersistDirectoryEntry en documentos de PowerPoint, lo que permite a los atacantes remotos ejecutar código arbitrario o causar una denegación de servicio (corrupción de memoria) por medio de una Diapositiva con un registro malformado, lo que desencadena una excepción y luego el uso de un método no especificado, también se conoce como "Persist Directory RCE Vulnerability."

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.