{"id":105336,"date":"2022-10-19T15:37:24","date_gmt":"2022-10-19T13:37:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-povysit-privilegii-v-sisteme"},"modified":"2022-10-19T15:37:24","modified_gmt":"2022-10-19T13:37:24","slug":"uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-povysit-privilegii-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-povysit-privilegii-v-sisteme","title":{"rendered":"Sebezhet\u0151s\u00e9g a Linux kernel io_uring alrendszer\u00e9ben, amely lehet\u0151v\u00e9 teszi a rendszerben val\u00f3 jogosults\u00e1gok emel\u00e9s\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az io_uring aszinkron bemeneti\/kimeneti interf\u00e9sz\u00e9nek megval\u00f3s\u00edt\u00e1s\u00e1ban, amely a Linux kernelben 5.1-es kiad\u00e1st\u00f3l kezdve \u00e9rhet\u0151 el, sebezhet\u0151s\u00e9get (CVE-2022-2602) fedeztek fel, amely lehet\u0151v\u00e9 teszi, hogy egy nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3 root jogokat szerezzen a rendszerben. A probl\u00e9ma l\u00e9tez\u00e9s\u00e9t a 5.4-es \u00e1gon \u00e9s a 5.15-\u00f6s \u00e1gt\u00f3l kezd\u0151d\u0151 kernelverzi\u00f3kban meger\u0151s\u00edtett\u00e9k. <\/p>\n

A sebezhet\u0151s\u00e9get egy m\u00e1r felszabad\u00edtott mem\u00f3ria blokkra t\u00f6rt\u00e9n\u0151 hivatkoz\u00e1s (use-after-free) okozza az io_uring alk\u00f6nyvt\u00e1r\u00e1ban, amely versenyhelyzet k\u00f6vetkezt\u00e9ben l\u00e9p fel egy io_uring k\u00e9r\u00e9s feldolgoz\u00e1sa sor\u00e1n a c\u00e9lf\u00e1jl eset\u00e9ben, amikor a szem\u00e9tgy\u0171jt\u0151 megsz\u00fcnteti az \u00f6sszes regisztr\u00e1lt f\u00e1jlle\u00edr\u00f3 blokkj\u00e1t \u00e9s az io_uring \u00e1ltal haszn\u00e1lt f\u00e1jlle\u00edr\u00f3 blokkj\u00e1t. A sebezhet\u0151s\u00e9g megnyilv\u00e1nul\u00e1s\u00e1nak mesters\u00e9ges l\u00e9trehoz\u00e1s\u00e1hoz a userfaultfd seg\u00edts\u00e9g\u00e9vel k\u00e9sleltetni lehet a k\u00e9r\u00e9st addig, am\u00edg a szem\u00e9tgy\u0171jt\u0151 fel nem freeszi a mem\u00f3ri\u00e1t. <\/p>\n

A probl\u00e9m\u00e1t felfedez\u0151 kutat\u00f3k bejelentett\u00e9k egy m\u0171k\u00f6d\u0151 exploit elk\u00e9sz\u00edt\u00e9s\u00e9t, amelyet okt\u00f3ber 25-\u00e9n k\u00edv\u00e1nnak k\u00f6zz\u00e9tenni, hogy id\u0151t adjanak a felhaszn\u00e1l\u00f3knak a friss\u00edt\u00e9sek telep\u00edt\u00e9s\u00e9re. A jav\u00edt\u00e1s jelenleg patch form\u00e1j\u00e1ban \u00e9rhet\u0151 el. A disztrib\u00faci\u00f3k sz\u00e1m\u00e1ra friss\u00edt\u00e9sek eddig m\u00e9g nem jelentek meg, de nyomon lehet k\u00f6vetni megjelen\u00e9s\u00fcket a k\u00f6vetkez\u0151 oldalakon: Debian, Ubuntu, Gentoo, RHEL, Fedora, SUSE\/openSUSE, Arch.
\n
Forr\u00e1s: 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-2022-2602), \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. \u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043e \u0432 \u0432\u0435\u0442\u043a\u0435 5.4 \u0438 \u044f\u0434\u0440\u0430\u0445 \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0442\u043a\u0438 5.15. \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 (use-after-free) \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 io_uring, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u0435\u0442 \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f \u0433\u043e\u043d\u043a\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-105336","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\udd47Sebezhet\u0151s\u00e9g az io_uring alrendszer\u00e9ben a Linux kernelben, amely lehet\u0151v\u00e9 teszi a privil\u00e9giumok emel\u00e9s\u00e9t a rendszerben | ProHoster","description":"Az io_uring aszinkron bemeneti\/kimeneti interf\u00e9sz\u00e9nek megval\u00f3s\u00edt\u00e1s\u00e1ban, amely a Linux kernelben 5.1-es kiad\u00e1st\u00f3l kezdve \u00e9rhet\u0151 el, sebezhet\u0151s\u00e9get (CVE-2022-2602) fedeztek fel, amely lehet\u0151v\u00e9 teszi, hogy egy nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3 jogokat szerezzen a rendszer root szintj\u00e9n.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-povysit-privilegii-v-sisteme","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 | ProHoster","og:description":"\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-2022-2602), \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.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-podsisteme-io_uring-yadra-linux-pozvolyayushhaya-povysit-privilegii-v-sisteme","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-10-19T13:37:24+00:00","article:modified_time":"2022-10-19T13:37:24+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/105336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=105336"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/105336\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=105336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=105336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=105336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}