{"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\/cs\/blog\/news\/udalyonnaya-root-uyazvimost-v-samba","title":{"rendered":"Vzd\u00e1len\u00e1 root zranitelnost v Samb\u011b","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byly zve\u0159ejn\u011bny opravn\u00e9 verze bal\u00edk\u016f 4.15.5, 4.14.12 a 4.13.17, kter\u00e9 odstra\u0148uj\u00ed 3 zranitelnosti. Nejnebezpe\u010dn\u011bj\u0161\u00ed zranitelnost (CVE-2021-44142) umo\u017e\u0148uje vzd\u00e1len\u00e9mu \u00fato\u010dn\u00edkovi spustit libovoln\u00fd k\u00f3d s pr\u00e1vy root na syst\u00e9mu se zranitelnou verz\u00ed Samba. Probl\u00e9m byl hodnocen stupn\u011bm z\u00e1va\u017enosti 9,9 z 10.    <\/p>\n<p>Zranitelnost se projevuje pouze p\u0159i pou\u017eit\u00ed VFS modulu vfs_fruit s v\u00fdchoz\u00edmi parametry (fruit:metadata=netatalk nebo fruit:resource=file), co\u017e poskytuje dal\u0161\u00ed \u00farove\u0148 kompatibility s klienty mac OS a vylep\u0161uje p\u0159enositelnost s fi <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/dts-dusseldorf\/\"   title=\"servery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3448\">servery<\/a> Netatalk 3 AFP. Probl\u00e9m je zp\u016fsoben p\u0159ete\u010den\u00edm bufferu v k\u00f3du pro zpracov\u00e1n\u00ed metadat s roz\u0161\u00ed\u0159en\u00fdmi atributy (EA, xattr), kter\u00e9 je vyvol\u00e1no p\u0159i otev\u00edr\u00e1n\u00ed soubor\u016f v smbd. Aby mohlo b\u00fdt za\u00fato\u010deno, mus\u00ed m\u00edt u\u017eivatel p\u0159\u00edstup k z\u00e1pisu k roz\u0161\u00ed\u0159en\u00fdm atribut\u016fm souboru, p\u0159i\u010dem\u017e \u00fatok m\u016f\u017ee prov\u00e9st i hostuj\u00edc\u00ed u\u017eivatel, pokud mu je takov\u00fd z\u00e1pis povolen.          <\/p>\n<p>V\u00fdstup aktualizac\u00ed bal\u00ed\u010dk\u016f v distribuc\u00edch lze sledovat na str\u00e1nk\u00e1ch: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD. Jako obranou p\u0159i ochran\u011b lze odstranit modul &#171;fruit&#187; ze seznamu &#171;vfs objects&#187; v smb.conf.      <\/p>\n<p>Zb\u00fdvaj\u00edc\u00ed dv\u011b zranitelnosti:  <\/p>\n<ul>\n<li class=\"l\"> Zranitelnost CVE-2022-0336 umo\u017e\u0148uje u\u017eivateli Samba AD DC vyd\u00e1vat se za jinou slu\u017ebu a uspo\u0159\u00e1dat odchyt adresovan\u00e9ho tomuto servisu provozu. Aby mohl \u00fatok prov\u00e9st, mus\u00ed m\u00edt u\u017eivatel pr\u00e1vo m\u011bnit atribut servicePrincipalName v \u00fa\u010dtu.\n<li class=\"l\"> Zranitelnost CVE-2021-44141 m\u016f\u017ee v\u00e9st k \u00faniku informac\u00ed o existenci soubor\u016f a adres\u00e1\u0159\u016f v oblasti F\u0421 za hranicemi exportovan\u00e9 \u010d\u00e1sti Samba. \u00datok je prov\u00e1d\u011bn manipulac\u00ed se symbolick\u00fdmi odkazy.  <\/ul>\n<p>Zdroj: <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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta 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