{"id":110711,"date":"2023-10-10T03:10:26","date_gmt":"2023-10-10T01:10:26","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ubuntu-ogranichit-dostup-k-user-namespace"},"modified":"2023-10-10T03:10:26","modified_gmt":"2023-10-10T01:10:26","slug":"ubuntu-ogranichit-dostup-k-user-namespace","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/ubuntu-ogranichit-dostup-k-user-namespace","title":{"rendered":"Az Ubuntu korl\u00e1tozza a hozz\u00e1f\u00e9r\u00e9st a user namespace-hez","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Canonical bejelentette, hogy az Ubuntu 23.10 verzi\u00f3j\u00e1ban v\u00e1ltoztat\u00e1sokat hajtanak v\u00e9gre, amelyek korl\u00e1tozz\u00e1k a felhaszn\u00e1l\u00f3k hozz\u00e1f\u00e9r\u00e9s\u00e9t a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez (user namespace), ezzel n\u00f6velve a kont\u00e9neriz\u00e1lt rendszerek v\u00e9delm\u00e9t a sebezhet\u0151s\u00e9gekkel szemben, amelyek kihaszn\u00e1l\u00e1s\u00e1hoz sz\u00fcks\u00e9ges a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9r manipul\u00e1l\u00e1sa. A Google adatai szerint a Linux kernel sebezhet\u0151s\u00e9geihez kapcsol\u00f3d\u00f3 jutalmak programj\u00e1ban a 44%-os exploitok megk\u00f6vetelik a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9r l\u00e9trehoz\u00e1s\u00e1nak lehet\u0151s\u00e9g\u00e9t. <\/p>\n

Az Ubuntu-ban a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9r teljes lez\u00e1r\u00e1sa helyett egy hibrid megold\u00e1st alkalmaztak, amely bizonyos programok sz\u00e1m\u00e1ra lehet\u0151v\u00e9 teszi a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9r l\u00e9trehoz\u00e1s\u00e1t, amennyiben rendelkeznek az \"allow userns create\" AppArmor profilj\u00e1val vagy a CAP_SYS_ADMIN joggal. P\u00e9ld\u00e1ul a Chrome sz\u00e1m\u00e1ra k\u00e9sz\u00fclt profil a \/etc\/apparmor.d\/opt.google.chrome.chrome, amely p\u00e9lda lehet m\u00e1s programok sz\u00e1m\u00e1ra a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s enged\u00e9lyez\u00e9s\u00e9re. <\/p>\n

Az Ubuntu 23.10 k\u00f6vetkez\u0151 verzi\u00f3j\u00e1ban a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s korl\u00e1toz\u00e1s\u00e1t opci\u00f3k\u00e9nt szeretn\u00e9k felaj\u00e1nlani, amely alap\u00e9rtelmez\u00e9s szerint nincs enged\u00e9lyezve. Az Ubuntu 23.10 kiad\u00e1sa ut\u00e1n n\u00e9h\u00e1ny h\u00e9ten bel\u00fcl a fejleszt\u0151k \u00f6sszegy\u0171jtik az adatokat arr\u00f3l, hogy a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s letilt\u00e1sa milyen negat\u00edv hat\u00e1ssal lehet a csomagok m\u0171k\u00f6d\u00e9s\u00e9re, \u00e9s elk\u00e9sz\u00edtik a megfelel\u0151 AppArmor profilt. Ezut\u00e1n a kernel csomag (Stabil Kiad\u00e1si Friss\u00edt\u00e9sek) egy jav\u00edt\u00f3 friss\u00edt\u00e9s\u00e9ben az alap\u00e9rtelmezett be\u00e1ll\u00edt\u00e1s aktiv\u00e1l\u00e1sra ker\u00fcl. <\/p>\n

A korai korl\u00e1toz\u00e1s aktiv\u00e1l\u00e1s\u00e1hoz a k\u00f6vetkez\u0151 parancsokat haszn\u00e1lhatja: sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=1 sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=1 <\/p>\n

A letilt\u00e1shoz: sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=0 sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Canonical \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u0438 \u0432 Ubuntu 23.10 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0434\u043e\u0441\u0442\u0443\u043f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043a \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430\u043c \u0438\u043c\u0451\u043d \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f (user namespace), \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0441\u0442\u044c \u0441\u0438\u0441\u0442\u0435\u043c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043d\u0443\u044e \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e, \u043e\u0442 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0434\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0438 \u0441 user namespace. \u041f\u043e \u0434\u0430\u043d\u043d\u044b\u043c Google, 44% \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u043e\u0432, \u0443\u0447\u0430\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0432 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0435 \u043f\u043e \u0432\u044b\u043f\u043b\u0430\u0442\u0435 \u0434\u0435\u043d\u0435\u0436\u043d\u044b\u0445 \u0432\u043e\u0437\u043d\u0430\u0433\u0440\u0430\u0436\u0434\u0435\u043d\u0438\u0439 \u0437\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux, […]<\/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-110711","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\udd47Az Ubuntu korl\u00e1tozni fogja a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez val\u00f3 hozz\u00e1f\u00e9r\u00e9st | ProHoster","description":"A Canonical bejelentette, hogy az Ubuntu 23.10 verzi\u00f3j\u00e1ban v\u00e1ltoztat\u00e1sokat hajtanak v\u00e9gre, amelyek korl\u00e1tozz\u00e1k a felhaszn\u00e1l\u00f3k hozz\u00e1f\u00e9r\u00e9s\u00e9t a felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rhez (user namespace), ezzel n\u00f6velve a rendszerek v\u00e9delm\u00e9t.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/ubuntu-ogranichit-dostup-k-user-namespace","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\udd47Ubuntu \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0442 \u0434\u043e\u0441\u0442\u0443\u043f \u043a user namespace | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Canonical \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u0438 \u0432 Ubuntu 23.10 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439, \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0434\u043e\u0441\u0442\u0443\u043f \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043a \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430\u043c \u0438\u043c\u0451\u043d \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f (user namespace), \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0441\u0442\u044c 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