{"id":100218,"date":"2021-05-20T22:22:38","date_gmt":"2021-05-20T20:22:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-runc-pozvolyayushhaya-poluchit-dostup-k-fs-vne-kontejnera"},"modified":"2021-05-20T22:22:38","modified_gmt":"2021-05-20T20:22:38","slug":"uyazvimost-v-runc-pozvolyayushhaya-poluchit-dostup-k-fs-vne-kontejnera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimost-v-runc-pozvolyayushhaya-poluchit-dostup-k-fs-vne-kontejnera","title":{"rendered":"S\u00e5rbarhed i runc, der giver adgang til filsystemet uden for containeren","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I v\u00e6rkt\u00f8jet til at k\u00f8re isolerede containerer, runc, der anvendes i Docker og Kubernetes, er der opdaget en s\u00e5rbarhed (CVE-2021-30465), der giver mulighed for adgang fra containeren til v\u00e6rtsmilj\u00f8ets hovedfilssystem. Gennem manipulation med symboliske links kan der laves en tilsyneladende uskyldig konfiguration af containeren, som vil f\u00f8re til, at der bind-monteres et eksternt filsystem inden i containeren. Problemet er blevet l\u00f8st i runc opdatering 1.0.0-rc95. <\/p>\n

For at udnytte s\u00e5rbarheden skal angriberen have mulighed for at k\u00f8re containere med ekstra monteringspunkter i konfigurationen (for eksempel reproduceres problemet i milj\u00f8er baseret p\u00e5 Kubernetes, hvor brugere kan k\u00f8re deres containere). P\u00e5 grund af et tidsvindue mellem kontrol og brug af monteringspunkter til partitioner, der deles med andre containere, kan angriberen under starten af containeren udnytte en race condition og erstatte den mappe, der anvendes ved montering i containeren, med et symbolsk link til et omr\u00e5de uden for roden af containerens filsystem.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 runc 1.0.0-rc95. \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 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 […]<\/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-100218","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\udd47S\u00e5rbarhed i runc, der giver adgang til filsystemet uden for containeren | ProHoster","description":"I v\u00e6rkt\u00f8jet til at 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