{"id":104786,"date":"2022-08-07T15:36:38","date_gmt":"2022-08-07T13:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera"},"modified":"2022-08-07T15:36:38","modified_gmt":"2022-08-07T13:36:38","slug":"uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera","title":{"rendered":"Vuln\u00e9rabilit\u00e9 dans la sous-syst\u00e8me io_uring du noyau Linux permettant d'obtenir des droits root depuis un conteneur","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e dans l'impl\u00e9mentation de l'interface d'entr\u00e9e\/sortie asynchrone io_uring, incluse dans le noyau Linux depuis la version 5.1 (CVE-2022-29582), permettant \u00e0 un utilisateur non privil\u00e9gi\u00e9 d'obtenir des droits root dans le syst\u00e8me, y compris lors de l'ex\u00e9cution de l'exploit \u00e0 partir d'un conteneur. La vuln\u00e9rabilit\u00e9 est caus\u00e9e par l'acc\u00e8s \u00e0 un bloc de m\u00e9moire d\u00e9j\u00e0 lib\u00e9r\u00e9, et se manifeste dans les noyaux Linux \u00e0 partir de la branche 5.10, corrig\u00e9e en avril dans les mises \u00e0 jour 5.10.111, 5.15.34 et 5.17.3. <\/p>\n

L'acc\u00e8s \u00e0 la m\u00e9moire lib\u00e9r\u00e9e se produit \u00e0 la suite d'une condition de course lors du traitement des d\u00e9lais dans la fonction io_flush_timeouts(), qui supprime l'enregistrement du d\u00e9lai dans la liste et l'annule, sans v\u00e9rifier la cr\u00e9ation et la suppression du d\u00e9lai \u00e0 ce moment-l\u00e0. <\/p>\n

Des chercheurs ont pr\u00e9par\u00e9 un exploit op\u00e9rationnel, ne n\u00e9cessitant pas l'activation des espaces de noms d'identifiants d'utilisateurs (user namespaces) et capable de fournir un acc\u00e8s root au syst\u00e8me principal lors de l'ex\u00e9cution de l'exploit par un utilisateur non privil\u00e9gi\u00e9 dans un conteneur isol\u00e9. L'exploit fonctionne \u00e9galement dans un environnement isol\u00e9 nsjail sur la distribution Google COS (Container Optimized OS), bas\u00e9e sur Chromium OS et utilis\u00e9e sur Google Cloud Platform dans des machines virtuelles<\/a> Compute Engine. L'exploit est con\u00e7u pour fonctionner avec les branches de noyau allant de 5.10 \u00e0 5.12.
\n
Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0430 \u0430\u0441\u0438\u043d\u0445\u0440\u043e\u043d\u043d\u043e\u0433\u043e \u0432\u0432\u043e\u0434\u0430\/\u0432\u044b\u0432\u043e\u0434\u0430 io_uring, \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0433\u043e \u0432 \u044f\u0434\u0440\u043e Linux \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u044b\u043f\u0443\u0441\u043a\u0430 5.1, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-29582), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, 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[…]<\/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-104786","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\udd47Vuln\u00e9rabilit\u00e9 dans la sous-syst\u00e8me io_uring du noyau Linux, permettant d'obtenir des droits root \u00e0 partir d'un conteneur | ProHoster","description":"Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 identifi\u00e9e dans l'impl\u00e9mentation de l'interface d'entr\u00e9e\/sortie asynchrone io_uring, incluse dans le noyau Linux depuis la version 5.1 (CVE-2022-29582), permettant \u00e0 un utilisateur non 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