CVE-2011-0105

Microsoft Excel 2002 Service Pack 3, Office 2004 y 2008 para Mac, y Open XML File Format Converter para Mac obtiene un valor de cierta longitud de una posición de memoria sin inicializar, lo que permite a atacantes remotos provocar un desbordamiento de búfer y ejecutar código arbitrario mediante un archivo de Excel manipulado, también conocida como " vulnerabilidad inicialización de datos en Excel."

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 application's parsing of a particular record within a Microsoft Excel Compound Document. When specifying a particular value, the application will fail to initialize a variable that is used as the length of a memcpy operation. Due to the usage of the uninitialized value, with proper control of the program flow an attacker can force a length of their own choosing for the memcpy operation. This will cause a buffer overflow and can lead to code execution under the context of the application.