{"id":114696,"date":"2024-04-01T12:25:54","date_gmt":"2024-04-01T10:25:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-io_uring-pozvolyayushhaya-poluchit-privilegii-root"},"modified":"2024-04-01T12:25:54","modified_gmt":"2024-04-01T10:25:54","slug":"uyazvimost-v-podsisteme-io_uring-pozvolyayushhaya-poluchit-privilegii-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-io_uring-pozvolyayushhaya-poluchit-privilegii-root","title":{"rendered":"Turvaauk io_uring alams\u00fcsteemis, mis v\u00f5imaldab saada root-privileege","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Linuxi tuuma pakutud as\u00fcnkroonse sisendi\/v\u00e4ljundi io_uring liideses on tuvastatud haavatavus (CVE-2024-0582), mis v\u00f5imaldab mittepriviligeeritud kasutajal omandada s\u00fcsteemis root-konto \u00f5igused. Haavatavuse \u00e4rakasutamiseks piisab tavalisest kohalikust juurdep\u00e4\u00e4sust s\u00fcsteemile, ilma et oleks vaja manipuleerida nimespetsiifiliste ruumidega. Praegu on avalikult saadaval t\u00f6\u00f6tav eksploit, samuti on \u00fcksikasjalikult kirjeldatud teine haavatavuse \u00e4rakasutamise tehnika. <\/p>\n

Haavatavus tuleneb juba vabastatud m\u00e4lu ploki (use-after-free) juurde p\u00e4\u00e4semisest io_uring alam s\u00fcsteemis, mis tekib ringbufferi registreerimise ja vabastamise k\u00e4igus, kui seda on loodud lipuga IORING_REGISTER_PBUF_RING. Kui teostatakse mmap() operatsioon v\u00e4listatud puhvri \u00fcle, j\u00e4\u00e4b see p\u00e4rast vabastamise operatsiooni teostamist (IORING_UNREGISTER_PBUF_RING) kasutaja ruumi peegelduseks. Kasutades seda omadust, suudab r\u00fcndaja lugeda ja kirjutada andmeid tuuma m\u00e4lujaotuse s\u00fcsteemi tagastatud m\u00e4lu lehtedele. <\/p>\n

Probleem ilmneb alates Linuxi versiooni 6.4 v\u00e4ljaandmisest ja on k\u00f5rvaldatud versioonides 6.7 ja 6.6.5, samuti Ubuntu 22.04 ja 23.10 jaoks ettevalmistatud versioonis 6.5.0-21. T\u00e4helepanuv\u00e4\u00e4rne on, et p\u00f5hiydarmis probleem lahendati detsembris 2023, projekti Google Zero kaudu avati teave haavatavuse signaali kohta 8. jaanuaril ning paranduspakett Ubuntu 6.5 jaoks loodi alles 22. veebruaril 2024. Muudes distributsioonides saab veaparandust ja haavatavust j\u00e4lgida lehtedel: Debian, Gentoo, RHEL, SUSE, Fedora, Arch. <\/p>\n

\u041f\u0435\u0440\u0432\u044b\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u0443\u0435\u0442 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435\u043c \u0431\u043e\u043b\u044c\u0448\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u044b\u0445 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c \u0441\u0442\u0440\u0430\u043d\u0438\u0446 \u043f\u0430\u043c\u044f\u0442\u0438 \u0434\u043b\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0441\u043a\u043b\u0430\u0434\u043a\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 \u044f\u0434\u0440\u0435 \u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u043e\u0441\u0435\u0434\u043d\u0438\u043c \u0444\u0438\u0437\u0438\u0447\u0435\u0441\u043a\u0438\u043c \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u043c \u043f\u0430\u043c\u044f\u0442\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043c\u0430\u044f\u043a\u043e\u0432 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440 \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u0441\u043e\u043a\u0435\u0442\u043e\u0432. \u0414\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043a\u043e\u0434\u0430 \u0432 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0435 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d «\u0433\u0430\u0434\u0436\u0435\u0442» (\u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0432 \u044f\u0434\u0440\u0435 \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0438\u0439 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u0438 call_usermodehelper_exec, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u0438\u0437 \u044f\u0434\u0440\u0430. <\/p>\n

Teine eksploit tugineb sellele, et kui k\u00f5ik slab-plokid vahem\u00e4lus on t\u00e4is (n\u00e4iteks, kui sama faili avatakse korduvalt), siis vabanenud m\u00e4lu lehed, millele r\u00fcndaja p\u00e4\u00e4seb, kasutatakse m\u00e4luhalduss\u00fcsteemi poolt uue slab-ploki loomiseks ning k\u00f5ik uued failistruktuurid hakkavad selle ploki sees paiknema. Seega satuvad m\u00f5ned failistruktuurid m\u00e4lu lehtedele, millele r\u00fcndaja v\u00f5ib lugeda ja kirjutada. Ekspluateerimine seisneb sel juhul selles, et korraldatakse vajalik faili sattumine failivahem\u00e4llu ja asendatakse sellega seotud failistruktuurides f_mode v\u00e4lja v\u00e4\u00e4rtus, mis m\u00e4\u00e4rab juurdep\u00e4\u00e4su\u00f5igused, v\u00f5imaldades vajalikku s\u00fcsteemifaili, n\u00e4iteks \/etc\/passwd, kirjutamiseks k\u00e4tte saada.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0435 \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, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u044f\u0434\u0440\u043e\u043c Linux, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-0582), \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. \u0414\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0431\u044b\u0447\u043d\u043e\u0433\u043e \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0431\u0435\u0437 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0439 \u0441 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430\u043c\u0438 \u0438\u043c\u0451\u043d. \u0412 \u043d\u0430\u0441\u0442\u043e\u044f\u0449\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0438\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e \u043e\u043f\u0438\u0441\u0430\u043d\u0430 \u0432\u0442\u043e\u0440\u0430\u044f \u0442\u0435\u0445\u043d\u0438\u043a\u0430 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438. \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 […]<\/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-114696","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47Haavatavus io_uringi alams\u00fcsteemis, mis v\u00f5imaldab saada root-privileege | ProHoster","description":"Linuxi tuuma poolt pakutavas as\u00fcnkroonse sisendi\/v\u00e4ljundi io_uringi liideses on avastatud haavatavus (CVE-2024-0582), mis v\u00f5imaldab mitteprivilegeeritud kasutajal saada s\u00fcsteemis root-j\u00f5ud. Haavatavuse \u00e4rakasutamiseks on piisav tavaline kohalik juurdep\u00e4\u00e4s s\u00fcsteemile, ilma et oleks vaja nimevahekorra manipuleerimist. Praegu on avalikult saadaval t\u00f6\u00f6riist haavatavuse kasutamiseks ning on \u00fcksikasjalikult kirjeldatud teist haavatavuse \u00e4rakasutamise tehnikat. Haavatavus on p\u00f5hjustatud juba vabastatud","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-podsisteme-io_uring-pozvolyayushhaya-poluchit-privilegii-root","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 root | ProHoster","og:description":"\u0412 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441\u0435 \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, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u044f\u0434\u0440\u043e\u043c Linux, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-0582), \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. \u0414\u043b\u044f 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