CVE-2022-2320

Se ha encontrado un fallo en Xorg-x11-server. El fallo específico es producido en la administración de las peticiones ProcXkbSetDeviceInfo. El problema es debido a que no se comprueban apropiadamente los datos suministrados por el usuario, lo que puede resultar en un acceso a la memoria más allá del final de un búfer asignado. Este fallo permite a un atacante escalar privilegios y ejecutar código arbitrario en el contexto de root

This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of ProcXkbSetDeviceInfo requests. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Xwayland is an X server for running X clients under Wayland. Issues addressed include an out of bounds access vulnerability.