{"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\/pt\/blog\/news\/obnovlenie-x-org-server-21-1-4-s-ustraneniem-uyazvimostej","title":{"rendered":"Atualiza\u00e7\u00e3o do X.Org Server 21.1.4 com corre\u00e7\u00f5es de vulnerabilidades","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Est\u00e1 dispon\u00edvel uma vers\u00e3o corretiva do X.Org Server 21.1.4, que corrige duas vulnerabilidades nos manipuladores da extens\u00e3o Xkb, permitindo a eleva\u00e7\u00e3o de privil\u00e9gios no sistema, se o servidor X estiver sendo executado com permiss\u00f5es de root, ou a execu\u00e7\u00e3o de c\u00f3digo em um sistema remoto ao acessar via redirecionamento de sess\u00e3o X11 usando SSH. As vulnerabilidades s\u00e3o causadas pela falta de verifica\u00e7\u00e3o adequada do tamanho nos manipuladores de solicita\u00e7\u00e3o ProcXkbSetGeometry (CVE-2022-2319) e ProcXkbSetDeviceInfo (CVE-2022-2320), que podem ser exploradas para gravar em \u00e1reas de mem\u00f3ria fora do buffer alocado. <\/p>\n

No caso do ProcXkbSetGeometry, n\u00e3o havia verifica\u00e7\u00e3o do tamanho dos campos de solicita\u00e7\u00e3o, permitindo que o cliente causasse um estouro ao especificar um n\u00famero de se\u00e7\u00f5es que n\u00e3o correspondia aos dados realmente enviados. Na fun\u00e7\u00e3o ProcXkbSetDeviceInfo, a vulnerabilidade foi causada pela ordem incorreta de chamada das fun\u00e7\u00f5es \u2014 a fun\u00e7\u00e3o para verificar os par\u00e2metros era chamada ap\u00f3s a fun\u00e7\u00e3o que utilizava esses par\u00e2metros (os nomes das fun\u00e7\u00f5es estavam trocados e a fun\u00e7\u00e3o XkbSetDeviceInfo inclu\u00eda o c\u00f3digo para verifica\u00e7\u00e3o, enquanto a XkbSetDeviceInfoCheck era para definir os valores).
\n
Fonte: 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\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 Atualiza\u00e7\u00e3o do X.Org Server 21.1.4 com corre\u00e7\u00f5es de vulnerabilidades | ProHoster","description":"Est\u00e1 dispon\u00edvel uma vers\u00e3o corretiva do X.Org Server 21.1.4, que corrige duas vulnerabilidades nos manipuladores da extens\u00e3o Xkb, permitindo a eleva\u00e7\u00e3o de privil\u00e9gios no sistema, se o servidor X estiver sendo executado com 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