CVE-2011-0979

Excel 2002 SP3, 2003 SP3, 2007 SP2 y 2010; Office 2004, 2008 y 2011 para Mac; Open XML File Format Converter para Mac; y Excel Viewer SP2 de Microsoft, no maneja apropiadamente los errores durante el análisis de registros Art de Office en hojas de cálculo de Excel, lo que permite a los atacantes remotos ejecutar código arbitrario por medio de un registro de objeto malformado, relacionado con una "stray reference", también se conoce como "Excel Linked List Corruption Vulnerability".

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office Excel. 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 the way the application parses an Office Art record within a Microsoft Excel Document. Specifically, when parsing an office art object record, if an error occurs, the application will add a stray reference to an element which is part of a linked list. When receiving a window message, the application will proceed to navigate this linked list. This will access a method from the malformed object which can lead to code execution under the context of the application.