CVE-2011-1999

Microsoft Internet Explorer v8 no asigna ni accede correctamente a la memoria, lo que permite a atacantes remotos ejecutar código de su elección a través de vectores que implican una "dirección de memoria no referenciada". También conocida como "vulnerabilidad de ejecución remota de código del elemento Select".

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer 8. 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 verifies arguments for a certain operation performed on an element. When parsing one of the operands of a method, the application will pass the argument straight to a method that will use the variant as an index. Due to bypassing the argument check, an aggressor can set the index to point to data outside the bounds of the array. This can lead to code execution under the context of the application.