{"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\/de\/blog\/news\/uyazvimost-v-runc-pozvolyayushhaya-poluchit-dostup-k-fs-vne-kontejnera","title":{"rendered":"Eine Schwachstelle in runc, die Zugang zum Dateisystem au\u00dferhalb des Containers erm\u00f6glicht","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Im Werkzeug f\u00fcr das Starten isolierter Container runc, das in Docker und Kubernetes verwendet wird, wurde eine Sicherheitsanf\u00e4lligkeit (CVE-2021-30465) entdeckt, die den Zugriff aus einem Container auf das Haupt-Dateisystem der Host-Umgebung erm\u00f6glicht. Durch Manipulation mit symbolischen Links kann eine auf den ersten Blick harmlose Container-Konfiguration vorbereitet werden, die zu einem Bind-Mounting des externen FS innerhalb des Containers f\u00fchrt. Das Problem wurde mit dem Update runc 1.0.0-rc95 behoben. <\/p>\n

Um die Sicherheitsanf\u00e4lligkeit auszunutzen, muss der Angreifer in der Lage sein, Container mit zus\u00e4tzlichen Montagepunkten in der Konfiguration zu starten (zum Beispiel tritt das Problem in Umgebungen auf Basis von Kubernetes auf, in denen Benutzer ihre eigenen Container starten k\u00f6nnen). Aufgrund des zeitlichen Fensters zwischen der \u00dcberpr\u00fcfung und der Verwendung von Montagepunkten f\u00fcr Partitionen, die mit anderen Containern gemeinsam genutzt werden, kann der Angreifer w\u00e4hrend des Starts des Containers einen Wettbewerbszustand ausnutzen und das bei der Montage im Container verwendete Verzeichnis durch einen symbolischen Link auf einen Bereich au\u00dferhalb des Wurzel-FS des Containers ersetzen.
\n
Quelle: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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