CVE-2022-46344

Se encontró una vulnerabilidad en X.Org. Esta falla de seguridad se produce porque el controlador de la solicitud XIChangeProperty tiene problemas de validación de longitud, lo que genera lecturas de memoria fuera de los límites y una posible divulgación de información. Este problema puede provocar una elevación de privilegios locales en sistemas donde el servidor X ejecuta código privilegiado y remoto para sesiones de reenvío ssh X.

A vulnerability was found in X.Org. The issue occurs because the handler for the XIChangeProperty request has a length-validation issue, resulting in out-of-bounds memory reads and potential information disclosure. This flaw can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

This vulnerability allows local attackers to disclose sensitive information 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 ProcXIChangeProperty requests. The issue results from the lack of proper validation of user-supplied data, which can result in a numeric truncation before allocating a buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of root.