{"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\/cs\/blog\/news\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","title":{"rendered":"Zranitelnost v u\u017eivatelsk\u00e9m prost\u0159ed\u00ed Enlightenment, kter\u00e1 umo\u017e\u0148uje z\u00edskat pr\u00e1va roota","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ve u\u017eivatelsk\u00e9m prost\u0159ed\u00ed Enlightenment byla odhalena zranitelnost (CVE-2022-37706), kter\u00e1 umo\u017e\u0148uje nep\u0159 privilegovan\u00e9mu m\u00edstn\u00edmu u\u017eivateli spustit k\u00f3d s pr\u00e1vy root. Zranitelnost zat\u00edm nebyla opravena (0-day), ale je ji\u017e k dispozici exploit, kter\u00fd byl otestov\u00e1n na Ubuntu 22.04. <\/p>\n

Probl\u00e9m se vyskytuje v provediteln\u00e9m souboru enlightenment_sys, dod\u00e1van\u00e9m s flagem suid root a vykon\u00e1vaj\u00edc\u00edm ur\u010dit\u00e1 povolen\u00e1 p\u0159\u00edkazy prost\u0159ednictv\u00edm vol\u00e1n\u00ed system(), jako je montov\u00e1n\u00ed \u00falo\u017ei\u0161t\u011b n\u00e1strojem mount. Kv\u016fli nespr\u00e1vn\u00e9 funk\u010dnosti, kter\u00e1 vytv\u00e1\u0159\u00ed \u0159et\u011bzec p\u0159ed\u00e1van\u00fd do vol\u00e1n\u00ed system(), jsou z argument\u016f spu\u0161t\u011bn\u00e9ho p\u0159\u00edkazu odstran\u011bny uvozovky, co\u017e m\u016f\u017ee b\u00fdt vyu\u017eito k spu\u0161t\u011bn\u00ed vlastn\u00edho k\u00f3du. Nap\u0159\u00edklad p\u0159i spu\u0161t\u011bn\u00ed 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

kv\u016fli odstran\u011bn\u00ed dvojit\u00fdch uvozovek, m\u00edsto uveden\u00e9ho p\u0159\u00edkazu \u2018\/bin\/mount \u2026 \u00ab\/dev\/..\/tmp\/;\/tmp\/exploit\u00bb \/tmp\/\/\/net\u2019 bude do funkce system() p\u0159ed\u00e1n \u0159et\u011bzec bez dvojit\u00fdch uvozovek \u2018\/bin\/mount \u2026 \/dev\/..\/tmp\/;\/tmp\/exploit \/tmp\/\/\/net\u2019, co\u017e povede k samostatn\u00e9mu vykon\u00e1n\u00ed p\u0159\u00edkazu \u2018\/tmp\/exploit \/tmp\/\/\/net\u2019 m\u00edsto zpracov\u00e1n\u00ed jako sou\u010d\u00e1sti cesty k za\u0159\u00edzen\u00ed. \u0158et\u011bzce \u00ab\/dev\/..\/tmp\/\u00bb a \u00ab\/tmp\/\/\/net\u00bb jsou zvoleny k obch\u00e1zen\u00ed kontroly argument\u016f p\u0159\u00edkazu mount v enlightenment_sys (montovan\u00e9 za\u0159\u00edzen\u00ed mus\u00ed za\u010d\u00ednat na \/dev\/ a odkazovat na existuj\u00edc\u00ed soubor, a t\u0159i znaky \u00ab\/\u00bb v bod\u011b montov\u00e1n\u00ed jsou uvedeny k dosa\u017een\u00ed po\u017eadovan\u00e9 d\u00e9lky cesty).
\n
Zdroj: 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 \u0434\u043e\u0441\u0442\u0443\u043f\u0435 \u0443\u0436\u0435 \u0438\u043c\u0435\u0435\u0442\u0441\u044f \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442, \u043f\u0440\u043e\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432 Ubuntu 22.04. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u043c \u0444\u0430\u0439\u043b\u0435 enlightenment_sys, \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u043c \u0441 \u0444\u043b\u0430\u0433\u043e\u043c suid root \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0449\u0435\u043c \u0447\u0435\u0440\u0435\u0437 \u0432\u044b\u0437\u043e\u0432 system() \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0435 \u0440\u0430\u0437\u0440\u0435\u0448\u0451\u043d\u043d\u044b\u0435 \u043a\u043e\u043c\u0430\u043d\u0434\u044b, \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\udd47Zranitelnost v u\u017eivatelsk\u00e9m prost\u0159ed\u00ed Enlightenment, kter\u00e1 umo\u017e\u0148uje z\u00edskat pr\u00e1va root | ProHoster","description":"Ve u\u017eivatelsk\u00e9m prost\u0159ed\u00ed Enlightenment byla odhalena zranitelnost (CVE-2022-37706), kter\u00e1 umo\u017e\u0148uje nep\u0159 privilegovan\u00e9mu m\u00edstn\u00edmu u\u017eivateli spustit k\u00f3d s pr\u00e1vy root.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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 root.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-v-polzovatelskom-okruzhenii-enlightenment-pozvolyayushhaya-poluchit-prava-root","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":"2022-09-16T01:36:41+00:00","article:modified_time":"2022-09-16T01:36:41+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\/cs\/wp-json\/wp\/v2\/posts\/105107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=105107"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/105107\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=105107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=105107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=105107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}