V module ksmbd, ktor\u00fd obsahuje vstavan\u00fa implement\u00e1ciu s\u00faborov\u00e9ho servera v jadre Linux na b\u00e1ze protokolu SMB, bola zisten\u00e1 kritick\u00e1 zranite\u013enos\u0165, ktor\u00e1 umo\u017e\u0148uje vzdialene dosiahnu\u0165 vykonanie vlastn\u00e9ho k\u00f3du s pr\u00e1vami jadra. \u00datok mo\u017eno vykona\u0165 bez autentifik\u00e1cie, sta\u010d\u00ed, aby bol na syst\u00e9me aktivovan\u00fd modul ksmbd. Probl\u00e9m sa objavuje od jadra 5.15, vydan\u00e9ho v novembri 2021, a bol bez zbyto\u010dn\u00e9ho zverejnenia opraven\u00fd v aktualiz\u00e1ci\u00e1ch 5.15.61, 5.18.18 a 5.19.2, vytvoren\u00fdch v auguste 2022. Ke\u010f\u017ee CVE identifik\u00e1tor probl\u00e9mu e\u0161te nebol pridelen\u00fd, presn\u00e9 inform\u00e1cie o oprave probl\u00e9mu v distrib\u00faci\u00e1ch zatia\u013e nie s\u00fa. <\/p>\n
Podrobnosti o zneu\u017eit\u00ed zranite\u013enosti zatia\u013e nie s\u00fa zverejnen\u00e9, je zn\u00e1me len to, \u017ee zranite\u013enos\u0165 je sp\u00f4soben\u00e1 pr\u00edstupom k u\u017e uvo\u013enenej oblasti pam\u00e4te (Use-After-Free) z d\u00f4vodu nedostatku kontroly existencie objektu pred vykonan\u00edm oper\u00e1ci\u00ed s n\u00edm. Probl\u00e9m s\u00favis\u00ed s t\u00fdm, \u017ee vo funkcii smb2_tree_disconnect() sa uvo\u013enila pam\u00e4\u0165 pridelen\u00e1 pre \u0161trukt\u00faru ksmbd_tree_connect, ale po tom zostal ukazovate\u013e, ktor\u00fd sa pou\u017e\u00edval pri spracovan\u00ed ur\u010dit\u00fdch extern\u00fdch po\u017eiadaviek obsahuj\u00facich pr\u00edkazy SMB2_TREE_DISCONNECT. <\/p>\n
Okrem spom\u00ednanej zranite\u013enosti v ksmbd boli opraven\u00e9 aj 4 menej z\u00e1va\u017en\u00e9 probl\u00e9my: <\/p>\n
Podpora prev\u00e1dzky SMB servera pomocou modulu ksmbd je dostupn\u00e1 v bal\u00edku Samba od verzie 4.16.0. Na rozdiel od SMB servera, ktor\u00fd funguje v u\u017e\u00edvate\u013eskom priestore, je ksmbd efekt\u00edvnej\u0161\u00ed z poh\u013eadu v\u00fdkonu, spotreby pam\u00e4te a integr\u00e1cie s roz\u0161\u00edren\u00fdmi mo\u017enos\u0165ami jadra. Ksmbd je prezentovan\u00fd ako vysoko v\u00fdkonn\u00fd a pripraven\u00fd na nasadenie na zabudovan\u00fdch zariadeniach, pri\u010dom sa d\u00e1 v pr\u00edpade potreby integrova\u0165 s n\u00e1strojmi a kni\u017enicami Samba. Autormi k\u00f3du ksmbd s\u00fa Namjae Jeon zo spolo\u010dnosti Samsung a Hyunchul Lee z LG, pri\u010dom jeho \u00fadr\u017ebu v jadre zabezpe\u010duje Steve French z Microsoftu, spr\u00e1vca podsystemu CIFS\/SMB2\/SMB3 v jadre Linux a dlhodob\u00fd \u00fa\u010dastn\u00edk t\u00edmu v\u00fdvoj\u00e1rov Samba, ktor\u00fd v\u00fdznamne prispel k implement\u00e1cii podpory protokolov SMB\/CIFS v Samba a Linuxe. \u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u044f\u0434\u0440\u0430. \u0410\u0442\u0430\u043a\u0430 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0430 \u0431\u0435\u0437 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0447\u0442\u043e\u0431\u044b \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0431\u044b\u043b \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d \u043c\u043e\u0434\u0443\u043b\u044c ksmbd. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u044f\u0434\u0440\u0430 5.15, \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u043d\u043e\u044f\u0431\u0440\u0435 2021 \u0433\u043e\u0434\u0430, \u0438 \u0431\u0435\u0437 \u043b\u0438\u0448\u043d\u0435\u0439 […]<\/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-106241","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\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\udd47Zranite\u013enos\u0165 v module ksmbd jadra Linux, ktor\u00e1 umo\u017e\u0148uje na dia\u013eku vykona\u0165 svoj k\u00f3d | ProHoster","description":"Vo module ksmbd, ktor\u00fd obsahuje integrovan\u00fa v jadre Linux implement\u00e1ciu s\u00faborov\u00e9ho servera na b\u00e1ze protokolu SMB, bola zisten\u00e1 kritick\u00e1 zranite\u013enos\u0165, ktor\u00e1 umo\u017e\u0148uje na dia\u013eku dosiahnu\u0165 vykonanie svojho k\u00f3du s pr\u00e1vami jadra.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimost-v-module-ksmbd-yadra-linux-pozvolyayushhaya-udalyonno-vypolnit-svoj-kod","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd \u044f\u0434\u0440\u0430 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 | ProHoster","og:description":"\u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 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\u044f\u0434\u0440\u0430.","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimost-v-module-ksmbd-yadra-linux-pozvolyayushhaya-udalyonno-vypolnit-svoj-kod","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2022-12-23T07:36:47+00:00","article:modified_time":"2022-12-23T07:36:47+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/106241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=106241"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/106241\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=106241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=106241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=106241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"