{"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\/sl\/blog\/news\/udalyonnaya-root-uyazvimost-v-samba","title":{"rendered":"Udaljena root ranjivost u Sambai","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Objavljeni so popravki za pakete 4.15.5, 4.14.12 in 4.13.17, ki odpravljajo 3 ranljivosti. Najbolj nevarna ranljivost (CVE-2021-44142) omogo\u010da oddaljenemu napadalcu, da izvede poljubno kodo z poverjenjem root na sistemu z ranljivo razli\u010dico Sambe. Te\u017eavi je dodeljena stopnja nevarnosti 9.9 od 10.    <\/p>\n<p>Ranljivost se pojavi le pri uporabi VFS-modula vfs_fruit s privzetimi nastavitvami (fruit:metadata=netatalk ali fruit:resource=file), ki zagotavlja dodatno raven zdru\u017eljivosti s strankami mac OS in izbolj\u0161uje prenosljivost s datote\u010dnimi <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-dusseldorf\/\"   title=\"stre\u017eniki\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3448\">stre\u017eniki<\/a> Netatalk 3 AFP. Te\u017eava je posledica prelivanja pomnilnika v kodi za obdelavo metapodatkov z raz\u0161irjenimi atributi (EA, xattr), ki se spro\u017ei pri odpiranju datotek v smbd. Da bi napad izvajalec, mora imeti dostop za pisanje do raz\u0161irjenih atributov datoteke, pri \u010demer lahko napad izvede tudi gostujo\u010di uporabnik, \u010de mu je dovoljeno to pisanje.          <\/p>\n<p>Izdavanje posodobitev paketov v distribucijah lahko spremljate na straneh: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD. Kot obvodno za\u0161\u010dito lahko odstranite modul &#171;fruit&#187; iz seznama &#171;vfs objects&#187; v smb.conf.      <\/p>\n<p>Preostali dve ranljivosti:  <\/p>\n<ul>\n<li class=\"l\"> Ranljivost CVE-2022-0336 omogo\u010da uporabniku Samba AD DC, da se predstavlja kot druga storitev in izvede prestrezanje prometa, ki je naslovljen tej storitvi. Za napad mora imeti uporabnik pravico do spremembe atributa servicePrincipalName v ra\u010dunu.\n<li class=\"l\"> Ranljivost CVE-2021-44141 lahko pripelje do uhajanja informacij o obstoju datotek in map v datote\u010dnem sistemu zunaj izvoznega razdelka Sambe. Napad se izvaja preko manipulacije s simboli\u010dnimi povezavami.  <\/ul>\n<p>Izvor: <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 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" 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