{"id":108845,"date":"2023-06-05T15:10:26","date_gmt":"2023-06-05T13:10:26","guid":{"rendered":"https:\/\/prohoster.info\/?p=108845"},"modified":"2023-06-05T17:18:04","modified_gmt":"2023-06-05T15:18:04","slug":"obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","title":{"rendered":"Elusi\u00f3n de las restricciones de SELinux relacionadas con la carga de m\u00f3dulos del n\u00facleo","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Se ha demostrado la posibilidad de eludir la prohibici\u00f3n de carga de m\u00f3dulos del n\u00facleo, implementada en las reglas targeted de SELinux en uno de los dispositivos analizados (no se especifica qu\u00e9 dispositivo se trata ni la medida en que el problema afecta las reglas de SELinux en los firmware y distribuciones). La prohibici\u00f3n de m\u00f3dulos en las reglas de SELinux involucradas se basaba en la restricci\u00f3n de acceso a la llamada del sistema finit_module, que permite cargar un m\u00f3dulo desde un archivo y se aplica en utilidades como insmod. Sin embargo, las reglas de SELinux no consideraron la llamada del sistema init_module, que tambi\u00e9n puede usarse para cargar m\u00f3dulos del n\u00facleo directamente desde el b\u00fafer en memoria. <\/p>\n

Para demostrar el m\u00e9todo, se ha preparado un prototipo de exploit que permite ejecutar c\u00f3digo a nivel de n\u00facleo mediante la carga de su propio m\u00f3dulo y desactivar completamente la protecci\u00f3n de SELinux, con acceso root limitado mediante SELinux al sistema.
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0437\u0430\u0433\u0440\u0443\u0437\u0438\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u044c \u0438\u0437 \u0444\u0430\u0439\u043b\u0430 \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c\u0443 \u0432 […]<\/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-108845","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\udd47Elusi\u00f3n de las restricciones de SELinux relacionadas con la carga de m\u00f3dulos del n\u00facleo | ProHoster","description":"Se ha demostrado la posibilidad de eludir la prohibici\u00f3n de carga de m\u00f3dulos del n\u00facleo, implementada en las reglas targeted de SELinux en uno de los dispositivos analizados (no se especifica qu\u00e9 dispositivo se trata ni la medida en que el problema.","canonical_url":"https:\/\/prohoster.info\/es\/blog\/news\/obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"es_ES","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0431\u0445\u043e\u0434 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 SELinux, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 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