CVE-2011-4261

RealNetworks RealPlayer anterior a v15.0.0 permite a atacantes remotos ejecutar código arbitrario o causar una denegación de servicio (heap memory corruption) a través de las dimensiones de video creadas en un archivo MP4.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. 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 dmp4 component. If the width value is altered inside the esds atom, arithmetic instructions within RealPlayer code can result in a loop counter wrapping to a large value. This can cause the loop to run too many times while operating on heap memory. By exploiting this condition, an attacker can corrupt memory and leverage that to execute code under the context of the user running the application.