{"id":104640,"date":"2022-07-12T21:36:50","date_gmt":"2022-07-12T19:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej"},"modified":"2022-07-12T21:36:50","modified_gmt":"2022-07-12T19:36:50","slug":"obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej","title":{"rendered":"Actualizaci\u00f3n de X.Org Server 21.1.4 con correcciones de vulnerabilidades","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Se ha lanzado una versi\u00f3n corregida de X.Org Server 21.1.4, en la que se han solucionado dos vulnerabilidades en los manejadores de la extensi\u00f3n Xkb, que permiten elevar privilegios en el sistema si el servidor X se ejecuta con derechos de root, o ejecutar c\u00f3digo en un sistema remoto si se accede mediante redirecci\u00f3n de sesi\u00f3n X11 usando SSH. Las vulnerabilidades fueron causadas por la falta de una verificaci\u00f3n adecuada del tama\u00f1o en los manejadores de solicitudes ProcXkbSetGeometry (CVE-2022-2319) y ProcXkbSetDeviceInfo (CVE-2022-2320), que se pueden explotar para escribir en \u00e1reas de memoria fuera del b\u00fafer asignado. <\/p>\n

En el caso de ProcXkbSetGeometry, se omiti\u00f3 la verificaci\u00f3n del tama\u00f1o de los campos de solicitud, lo que permit\u00eda al cliente provocar un desbordamiento al indicar en la solicitud un n\u00famero de secciones que no coincid\u00eda con los datos realmente enviados. En el controlador ProcXkbSetDeviceInfo, la vulnerabilidad fue causada por un orden incorrecto en la llamada a las funciones: la funci\u00f3n para verificar los par\u00e1metros se invocaba despu\u00e9s de la funci\u00f3n que utilizaba esos par\u00e1metros (los nombres de las funciones estaban confundidos y la funci\u00f3n XkbSetDeviceInfo inclu\u00eda c\u00f3digo para la verificaci\u00f3n, mientras que XkbSetDeviceInfoCheck era para establecer valores).
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a X.Org Server 21.1.4, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u0445 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f Xkb, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0435\u0441\u043b\u0438 X-\u0441\u0435\u0440\u0432\u0435\u0440 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root, \u0438\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0435\u0441\u043b\u0438 \u0434\u043b\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0441\u0435\u0430\u043d\u0441\u0430 X11 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 SSH. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432\u044b\u0437\u0432\u0430\u043d\u044b \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0440\u0430\u0437\u043c\u0435\u0440\u0430 \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 ProcXkbSetGeometry (CVE-2022-2319) \u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-104640","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Actualizaci\u00f3n de X.Org Server 21.1.4 con soluci\u00f3n de vulnerabilidades | ProHoster","description":"Se ha lanzado una versi\u00f3n corregida de X.Org Server 21.1.4, en la que se han solucionado dos vulnerabilidades en los manejadores de la extensi\u00f3n Xkb, que permiten elevar privilegios en el sistema si el servidor X se ejecuta con derechos de 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