{"id":105107,"date":"2022-09-16T03:36:41","date_gmt":"2022-09-16T01:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root"},"modified":"2022-09-16T03:36:41","modified_gmt":"2022-09-16T01:36:41","slug":"uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","title":{"rendered":"Ranljivost u korisni\u010dkom okru\u017eenju Enlightenment koja omogu\u0107ava sticanje root prava","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

U korisni\u010dkom okru\u017eenju Enlightenment otkrivena je ranjivost (CVE-2022-37706) koja omogu\u0107ava neprivilegiranom lokalnom korisniku da izvr\u0161i kod s pravima root. Ranjivost jo\u0161 nije ispravljena (0-day), ali je u slobodnom pristupu ve\u0107 dostupan exploit koji je testiran na Ubuntu 22.04. <\/p>\n

Problem se javlja u izvr\u0161noj datoteci enlightenment_sys, koja se isporu\u010duje s suid root oznakom i izvr\u0161ava odre\u0111ene dopu\u0161tene naredbe preko system() poziva, poput montiranja ure\u0111aja pomo\u0107u mount alata. Zbog neispravnog rada funkcije koja generira string proslije\u0111en system() pozivu, navodnici iz argumenata pokretane naredbe se izbacuju, \u0161to se mo\u017ee iskoristiti za pokretanje vlastitog koda. Na primjer, prilikom pokretanja mkdir -p \/tmp\/net mkdir -p \u00ab\/tmp\/;\/tmp\/exploit\u00bb echo \u00ab\/bin\/sh\u00bb > \/tmp\/exploit chmod a+x \/tmp\/exploit enlightenment_sys \/bin\/mount -o noexec,nosuid,utf8,nodev,iocharset=utf8,utf8=0,utf8=1,uid=$(id -u), \u00ab\/dev\/..\/tmp\/;\/tmp\/exploit\u00bb \/tmp\/\/\/net <\/p>\n

zbog izbacivanja dvostrukih navodnika, umjesto navedene naredbe \u2018\/bin\/mount \u2026 \u00ab\/dev\/..\/tmp\/;\/tmp\/exploit\u00bb \/tmp\/\/\/net\u2019 bit \u0107e proslije\u0111ena string bez dvostrukih navodnika \u2018\/bin\/mount \u2026 \/dev\/..\/tmp\/;\/tmp\/exploit \/tmp\/\/\/net\u2019, \u0161to \u0107e dovesti do odvojenog izvr\u0161avanja naredbe \u2018\/tmp\/exploit \/tmp\/\/\/net\u2019 umjesto obrade kao dijela puta ure\u0111aja. Strings \u2018\/dev\/..\/tmp\/\u2019 i \u2018\/tmp\/\/\/net\u2019 su odabrani zaobi\u0107i provjeru argumenata naredbe mount u enlightenment_sys (ure\u0111aj za montiranje mora po\u010deti s \/dev\/ i ukazivati na postoje\u0107u datoteku, a tri znaka \u2018\/\u2019 u to\u010dki montiranja su navedeni za postizanje potrebne duljine puta).
\n
Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u043e\u043c \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 Enlightenment \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-37706), \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 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043a\u0430 \u043d\u0435 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0430 (0-day), \u043d\u043e \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c 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\u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a \u043c\u043e\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f […]<\/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-105107","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\udd47Ranjivost u korisni\u010dkom okru\u017eenju Enlightenment koja omogu\u0107ava dobivanje root prava | ProHoster","description":"U korisni\u010dkom okru\u017eenju Enlightenment otkrivena je ranjivost (CVE-2022-37706) koja omogu\u0107ava neprivilegiranom lokalnom korisniku da izvr\u0161i kod s pravima root.","canonical_url":"https:\/\/prohoster.info\/hr\/blog\/news\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hr_HR","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\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u043e\u043c \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 Enlightenment, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root | ProHoster","og:description":"\u0412 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u043e\u043c \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 Enlightenment \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-37706), \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 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 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