CVE-2011-1964

Microsoft Internet Explorer 6 hasta la versión 9 no maneja apropiadamente objetos en memoria, lo que permite a atacantes remotos ejecutar código arbitrario accediendo a un objeto que (1) no fue apropiadamente inicializado o (2) ha sido borrado. También conocida como "vulnerabilidad de corrupcción de memoria de objeto de estilo".

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. 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 part of the application that is responsible for handling STYLE elements. By creating a STYLE element with an invalid behavior, an attacker can force an object of invalid type to be called, resulting in corruption of heap memory. This can be leveraged by an attacker to achieve code execution under the context of the application.