{"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\/sk\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera","title":{"rendered":"Zranite\u013enos\u0165 v subsyst\u00e9me io_uring jadra Linux, ktor\u00e1 umo\u017e\u0148uje z\u00edska\u0165 pr\u00e1va root z kontajnera.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V implement\u00e1cii rozhrania asynchr\u00f3nneho vstupu\/v\u00fdstupu io_uring, ktor\u00e9 je s\u00fa\u010das\u0165ou jadra Linux od verzie 5.1, bola zisten\u00e1 zranite\u013enos\u0165 (CVE-2022-29582), ktor\u00e1 umo\u017e\u0148uje neprivilegovan\u00e9mu pou\u017e\u00edvate\u013eovi z\u00edska\u0165 pr\u00e1va root v syst\u00e9me, vr\u00e1tane spustenia exploitu z kontajnera. T\u00e1to zranite\u013enos\u0165 je sp\u00f4soben\u00e1 pr\u00edstupom k u\u017e uvo\u013enenej oblasti pam\u00e4te a prejavuje sa v jadr\u00e1ch Linux od verzie 5.10 a bola odstr\u00e1nen\u00e1 v apr\u00edli v aktualiz\u00e1ci\u00e1ch 5.10.111, 5.15.34 a 5.17.3. <\/p>\n

Pr\u00edstup k uvo\u013enenej pam\u00e4ti nast\u00e1va v d\u00f4sledku stavu pretekania pri spracovan\u00ed \u010dasov\u00fdch limitov vo funkcii io_flush_timeouts(), ktor\u00e1 odstra\u0148uje z\u00e1znam o \u010dasovom limite zo zoznamu a zru\u0161\u00ed ho bez kontroly vytvorenia a odstr\u00e1nenia \u010dasov\u00e9ho limitu v tomto momente. <\/p>\n

V\u00fdskumn\u00edci pripravili funk\u010dn\u00fd exploit, ktor\u00fd na svoju \u010dinnos\u0165 nevy\u017eaduje aktiv\u00e1ciu priestorov n\u00e1zvov identifik\u00e1torov pou\u017e\u00edvate\u013eov (user namespaces) a dok\u00e1\u017ee poskytn\u00fa\u0165 root pr\u00edstup v hlavnom syst\u00e9me pri spusten\u00ed exploitu neprivilegovan\u00fdm pou\u017e\u00edvate\u013eom v izolovanom kontajneri. Tento exploit funguje aj v izolovanom prostred\u00ed nsjail v distrib\u00facii Google COS (Container Optimized OS), ktor\u00e1 je zalo\u017een\u00e1 na Chromium OS a pou\u017e\u00edva sa v Google Cloud Platform v virtu\u00e1lnych strojoch<\/a> Compute Engine. Exploit je navrhnut\u00fd na pr\u00e1cu s vetvami jadra od 5.10 po 5.12.
\n
Zdroj: 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\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\udd47Zranite\u013enos\u0165 v subsyst\u00e9me io_uring jadra Linux, ktor\u00e1 umo\u017e\u0148uje z\u00edska\u0165 pr\u00e1va root z kontajnera | ProHoster","description":"V implement\u00e1cii rozhrania asynchr\u00f3nneho vstupu\/v\u00fdstupu io_uring, ktor\u00e9 je s\u00fa\u010das\u0165ou jadra Linux od verzie 5.1, bola zisten\u00e1 zranite\u013enos\u0165 (CVE-2022-29582), ktor\u00e1 umo\u017e\u0148uje neprivilegovan\u00e9mu 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