CVE-2014-8094

Desbordamiento de enteros en la función ProcDRI2GetBuffers en la extensión DRI2 en X.Org Server (también conocido como xserver y xorg-server) 1.7.0 hasta 1.16.x anterior a 1.16.3 permite a usuarios remotos autenticados causar una denegación de servicio (caída) o posiblemente ejecutar código arbitrario a través de una solicitud manipulada, lo que provoca una lectura o escritura fuera de rango.

An integer overflow flaw was found in the way the X.Org server calculated memory requirements for certain DRI2 extension requests. A malicious, authenticated client could use this flaw to crash the X.Org server.

Ilja van Sprundel of IOActive discovered several security issues in the X.org X server, which may lead to privilege escalation or denial of service. Olivier Fourdan from Red Hat has discovered a protocol handling issue in the way the X server code base handles the XkbSetGeometry request, where the server trusts the client to send valid string lengths. A malicious client with string lengths exceeding the request length can cause the server to copy adjacent memory data into the XKB structs. This data is then available to the client via the XkbGetGeometry request. This can lead to information disclosure issues, as well as possibly a denial of service if a similar request can cause the server to crash.