CVE-2020-14360

Se encontró un fallo en el servidor X.Org anterior a la versión 1.20.10. Un acceso fuera de límites en la función XkbSetMap puede conllevar a una vulnerabilidad de escalada de privilegios. La mayor amenaza de esta vulnerabilidad es la confidencialidad e integridad de los datos, así como la disponibilidad del sistema

A flaw was found in the X.Org Server. An out-of-bounds access in the XkbSetMap function may lead to a privilege escalation vulnerability. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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 XkbSetMap 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 data structure. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.