CVE-2011-1346

Vulnerabilidad sin especificar en Microsoft Internet Explorer 8 en Windows 7 permite a atacantes remotos ejecutar código arbitrario a través de vectores de ataque desconocido, como ha demostrado Stephen Fewer con la segunda de las tres vulnerabilidades encadenadas durante el concurso Pwn2Own en la CanSecWest 2011.

This vulnerability allows remote attackers to leak information on vulnerable installations of 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 Internet Explorer that allows malicious users to leak information about the memory layout of an Internet Explorer process. When creating a new 'Option' HTML Element, the 'index' field of the object is not set to zero and can be used to leak the location of the global variable table. This can be used to defeat ASLR or to remove the need for heap spraying while exploiting a remote code execution flaw.