CVE-2014-4141

Microsoft Internet Explorer 8 hasta 11 permite a atacantes remotos ejecutar código arbitrario o causar una denegación de servicio (corrupción de memoria) a través de un sitio web manipulado, también conocido como 'vulnerabilidad de la corrupción de memoria de Internet Explorer.'

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 usage of CAttrValue objects. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

A specially crafted webpage can cause Microsoft Internet Explorer to reallocate a memory buffer in order to grow it in size. The original buffer will be copied to newly allocated memory and then freed. The code continues to use the freed copy of the buffer.