CVE-2016-7201

El motor de secuencias de comandos Chakra JavaScript en Microsoft Edge permite a atacantes remotos ejecutar código arbitrario o provocar una denegación de servicio (corrupción de memoria) a través de un sitio web manipulado, vulnerabilidad también conocida como "Scripting Engine Memory Corruption Vulnerability", una vulnerabilidad diferente a CVE-2016-7200, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242 y CVE-2016-7243.

JavascriptArray::FillFromPrototypes is a method that is used by several Javascript functions available in the browser to set the native elements of an array to the values provide by its prototype. This function calls JavascriptArray::ForEachOwnMissingArrayIndexOfObject with the prototype of the object as a parameter, and if the prototype of the object is an array, it assumes that it is a Var array. While arrays are generally converted to var arrays if they are set as an object's prototype, if an object's prototype is a Proxy object, it can return a parent prototype that is a native int array. This can lead to type confusing, allowing an integer to be treated as an absolute pointer, when JavascriptArray::FillFromPrototypes is called.

The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute remote code or cause a denial of service (memory corruption) via a crafted web site.