{"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\/ro\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera","title":{"rendered":"O vulnerabilitate \u00een subsistemul io_uring al nucleului Linux, care permite ob\u021binerea drepturilor de root dintr-un container.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00cen implementarea interfe\u021bei de intrare\/ie\u0219ire asincron\u0103 io_uring, care face parte din kernelul Linux \u00eencep\u00e2nd cu versiunea 5.1, a fost descoperit\u0103 o vulnerabilitate (CVE-2022-29582), care permite unui utilizator f\u0103r\u0103 privilegii s\u0103 ob\u021bin\u0103 drepturi de root \u00een sistem, inclusiv c\u00e2nd exploit-ul este rulat dintr-un container. Vulnerabilitatea este cauzat\u0103 de accesarea unei blocuri de memorie deja eliberate \u0219i se manifest\u0103 \u00een kernelurile Linux \u00eencep\u00e2nd cu ramura 5.10, fiind corectat\u0103 \u00een aprilie \u00een actualiz\u0103rile 5.10.111, 5.15.34 \u0219i 5.17.3. <\/p>\n

Accesarea memoriei eliberate are loc ca urmare a unei condi\u021bii de curs\u0103 \u00een procesarea timeout-urilor \u00een func\u021bia io_flush_timeouts(), care elimin\u0103 o \u00eenregistrare a timeout-ului din list\u0103 \u0219i \u00eel anuleaz\u0103, f\u0103r\u0103 a verifica crearea \u0219i eliminarea timeout-ului \u00een acel moment. <\/p>\n

Cercet\u0103torii au preg\u0103tit un exploit func\u021bional, care nu necesit\u0103 activarea spa\u021biilor de numere ale identificatorilor de utilizator (user namespaces) \u0219i care poate oferi acces root \u00een sistemul principal atunci c\u00e2nd este rulat de un utilizator f\u0103r\u0103 privilegii \u00eentr-un container izolat. Exploit-ul func\u021bioneaz\u0103, de asemenea, \u00een medii izolate nsjail \u00een distribu\u021bia Google COS (Container Optimized OS), bazat\u0103 pe Chromium OS \u0219i utilizat\u0103 pe Google Cloud Platform \u00een virtu\u00e1lne ma\u0161ini<\/a> Compute Engine. Exploit-ul este destinat s\u0103 func\u021bioneze cu ramurile kernelului de la 5.10 la 5.12.
\n
Sursa: opennet.ro<\/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, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u043f\u0440\u0438 \u0437\u0430\u043f\u0443\u0441\u043a\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430 \u0438\u0437 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u043e\u043c\u0443 \u0431\u043b\u043e\u043a\u0443 \u043f\u0430\u043c\u044f\u0442\u0438, \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u044f\u0434\u0440\u0430\u0445 Linux \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0442\u043a\u0438 5.10 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u0430\u043f\u0440\u0435\u043b\u0435 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 […]<\/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\udd47Vulnerabilitate \u00een subsistemul io_uring al kernelului Linux, care permite ob\u021binerea drepturilor de root dintr-un container | ProHoster","description":"\u00cen implementarea interfe\u021bei de intrare\/ie\u0219ire asincron\u0103 io_uring, care face parte din kernelul Linux \u00eencep\u00e2nd cu versiunea 5.1, a fost descoperit\u0103 o vulnerabilitate (CVE-2022-29582), care permite unui utilizator f\u0103r\u0103 privilegii s\u0103 ob\u021bin\u0103 drepturi de root \u00een.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-poluchit-prava-root-iz-kontejnera","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 io_uring \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f 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