{"id":103151,"date":"2022-01-31T21:36:52","date_gmt":"2022-01-31T19:36:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonnaya-root-uyazvimost-v-samba"},"modified":"2022-01-31T21:36:52","modified_gmt":"2022-01-31T19:36:52","slug":"udalyonnaya-root-uyazvimost-v-samba","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/news\/udalyonnaya-root-uyazvimost-v-samba","title":{"rendered":"Entfernte Root-Sicherheitsl\u00fccke in Samba","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Korrigierte Versionen des Pakets 4.15.5, 4.14.12 und 4.13.17 wurden ver\u00f6ffentlicht, um 3 Sicherheitsl\u00fccken zu beheben. Die gef\u00e4hrlichste Schwachstelle (CVE-2021-44142) erm\u00f6glicht es einem entfernten Angreifer, beliebigen Code mit Root-Rechten auf einem System mit verwundbarer Samba-Version auszuf\u00fchren. Das Problem wurde mit einer Gef\u00e4hrdungsstufe von 9,9 von 10 eingestuft.    <\/p>\n<p>Die Schwachstelle tritt nur auf, wenn das VFS-Modul vfs_fruit mit den Standardeinstellungen (fruit:metadata=netatalk oder fruit:resource=file) verwendet wird, das ein zus\u00e4tzliches Ma\u00df an Kompatibilit\u00e4t mit macOS-Clients bietet und die Portabilit\u00e4t mit Netatalk 3 AFP verbessert. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/de\/server\/dts-dusseldorf\/\"   title=\"Servern\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3448\">Servern<\/a> Das Problem wird durch einen Buffer-Overflow im Code, der Metadaten mit erweiterten Attributen (EA, xattr) verarbeitet, verursacht, der beim \u00d6ffnen von Dateien in smbd aufgerufen wird. Um den Angriff durchzuf\u00fchren, muss der Benutzer Schreibzugriff auf die erweiterten Attribute der Datei haben, wobei der Angriff auch von einem Gastbenutzer durchgef\u00fchrt werden kann, wenn dieser zur entsprechenden Schreibberechtigung autorisiert ist.          <\/p>\n<p>Die Ver\u00f6ffentlichung von Paketupdates in den Distributionen kann auf den Seiten verfolgt werden: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD. Als Umgehungsschutz kann das Modul &#171;fruit&#187; aus der Liste der &#171;vfs objects&#187; in smb.conf entfernt werden.      <\/p>\n<p>Die anderen beiden Schwachstellen:  <\/p>\n<ul>\n<li class=\"l\"> Die Schwachstelle CVE-2022-0336 erm\u00f6glicht es einem Samba AD DC-Benutzer, sich als ein anderer Dienst auszugeben und den an diesen Dienst adressierten Datenverkehr abzufangen. F\u00fcr den Angriff muss der Benutzer das Recht haben, das Attribut servicePrincipalName im Benutzerkonto zu \u00e4ndern.\n<li class=\"l\"> Die Schwachstelle CVE-2021-44141 kann zu einer Offenlegung von Informationen \u00fcber vorhandene Dateien und Verzeichnisse im Dateisystem au\u00dferhalb des exportierten Samba-Teils f\u00fchren. Der Angriff erfolgt durch Manipulation von symbolischen Links.  <\/ul>\n<p>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56615\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 4.15.5, 4.14.12 \u0438 4.13.17 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 3 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44142) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0435\u0439 Samba. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 9.9 \u0438\u0437 10. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 VFS-\u043c\u043e\u0434\u0443\u043b\u044f vfs_fruit \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e (fruit:metadata=netatalk \u0438\u043b\u0438 fruit:resource=file), \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c [&hellip;]<\/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-103151","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" 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