CVE-2024-0408

Se encontró una falla en el servidor X.Org. El código GLX PBuffer no llama al gancho XACE al crear el búfer, dejándolo sin etiquetar. Cuando el cliente emite otra solicitud para acceder a ese recurso (como con GetGeometry) o cuando crea otro recurso que necesita acceder a ese búfer, como un GC, el código XSELINUX intentará usar un objeto que nunca fue etiquetado y fallará porque el SID es NULO.

USN-6587-1 fixed vulnerabilities in X.Org X Server. The fix was incomplete resulting in a possible regression. This update fixes the problem. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled memory when processing the DeviceFocusEvent and ProcXIQueryPointer APIs. An attacker could possibly use this issue to cause the X Server to crash, obtain sensitive information, or execute arbitrary code. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled reattaching to a different master device. An attacker could use this issue to cause the X Server to crash, leading to a denial of service, or possibly execute arbitrary code. Olivier Fourdan and Donn Seeley discovered that the X.Org X Server incorrectly labeled GLX PBuffers when used with SELinux. An attacker could use this issue to cause the X Server to crash, leading to a denial of service. Olivier Fourdan discovered that the X.Org X Server incorrectly handled the curser code when used with SELinux. An attacker could use this issue to cause the X Server to crash, leading to a denial of service. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled memory when processing the XISendDeviceHierarchyEvent API. An attacker could possibly use this issue to cause the X Server to crash, or execute arbitrary code. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled devices being disabled. An attacker could possibly use this issue to cause the X Server to crash, or execute arbitrary code.