{"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\/da\/blog\/news\/ubuntu-ogranichit-dostup-k-user-namespace","title":{"rendered":"Ubuntu begr\u00e6nser adgangen til bruger-namespaces","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Canonical har annonceret \u00e6ndringer i Ubuntu 23.10, der begr\u00e6nser brugernes adgang til bruger-namespaces, hvilket vil \u00f8ge sikkerheden for systemer, der bruger containerisolering, mod s\u00e5rbarheder, der kr\u00e6ver manipulation af bruger-namespaces. If\u00f8lge Google kr\u00e6ver 44% af de exploits, der deltager i programmet for bel\u00f8nning for at finde s\u00e5rbarheder i Linux-kernen, muligheden for at oprette bruger-namespaces. <\/p>\n

I stedet for en fuldst\u00e6ndig blokering af adgang til user namespace i Ubuntu, er der anvendt et hybridssystem, der selektivt giver nogle programmer mulighed for at oprette user namespace, n\u00e5r der er en AppArmor-profil med reglen «allow userns create» eller retten CAP_SYS_ADMIN. For eksempel er der oprettet en profil i \/etc\/apparmor.d\/opt.google.chrome.chrome, som kan bruges som eksempel til at \u00e5bne adgang til user namespace for andre programmer. <\/p>\n

I den kommende Ubuntu 23.10-version planl\u00e6gger man at tilbyde begr\u00e6nsningen af adgangen til bruger-namespaces som en valgmulighed, der ikke er aktiveret som standard. I l\u00f8bet af de kommende uger efter udgivelsen af Ubuntu 23.10 vil udviklerne indsamle oplysninger om eventuelle negative virkninger af at deaktivere adgangen til bruger-namespaces p\u00e5 pakkerne og forberede de relevante AppArmor-profiler. Derefter vil begr\u00e6nsningen blive aktiveret som standard i en af de efterf\u00f8lgende opdateringer af kerne-pakken (Stable Release Updates). <\/p>\n

For tidlig aktivering af begr\u00e6nsningen kan f\u00f8lgende kommandoer anvendes: sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=1 sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=1 <\/p>\n

Og for at deaktivere den: sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=0 sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
\n
Kilde: 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\udd47Ubuntu begr\u00e6nser adgangen til bruger-namespaces | ProHoster","description":"Canonical har annonceret \u00e6ndringer i Ubuntu 23.10, der begr\u00e6nser brugernes adgang til bruger-namespaces, hvilket vil \u00f8ge sikkerheden for systemer.","canonical_url":"https:\/\/prohoster.info\/da\/blog\/news\/ubuntu-ogranichit-dostup-k-user-namespace","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"da_DK","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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