CVE-2011-3459

Error de superación de límite (off-by-one) en QuickTime en Apple Mac OS X antes de v10.7.3 permite a atacantes remotos ejecutar código de su elección o causar una denegación de servicio (caída de aplicación) a través de un átomo rdrf manipulado en un archivo de película que provoca un desbordamiento de búfer.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of QuickTime Player. 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 occurs when parsing a movie file containing multiple atoms with a different string length. When resizing a buffer in order to make space for the string, the application will forget to include the null-terminator. When the application attempts to null-terminate the string, an out-of-bounds write will occur. If an aggressor can place the a useful heap buffer contiguous to the reallocated string, this can lead to code execution under the context of the applicaiton.