{"id":108845,"date":"2023-06-05T15:10:26","date_gmt":"2023-06-05T13:10:26","guid":{"rendered":"https:\/\/prohoster.info\/?p=108845"},"modified":"2023-06-05T17:18:04","modified_gmt":"2023-06-05T15:18:04","slug":"obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","title":{"rendered":"\u00d6verskridande av SELinux-begr\u00e4nsningar relaterade till inl\u00e4sning av k\u00e4rnmoduler","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

M\u00f6jligheten att kringg\u00e5 f\u00f6rbudet mot att ladda k\u00e4rnmoduler, som implementerats i targeted-reglerna f\u00f6r SELinux p\u00e5 en av de studerade enheterna, har demonstrerats (det anges inte vilken enhet det handlar om och hur stort problemet \u00e4r n\u00e4r det g\u00e4ller SELinux-regler i firmware och distributioner). Blockeringen av moduler i de aktuella SELinux-reglerna baserades p\u00e5 begr\u00e4nsningen av \u00e5tkomst till systemanropet finit_module, vilket m\u00f6jligg\u00f6r att ladda en modul fr\u00e5n en fil och till\u00e4mpas i verktyg som insmod. Samtidigt beaktade SELinux-reglerna inte systemanropet init_module, vilket ocks\u00e5 kan anv\u00e4ndas f\u00f6r att ladda k\u00e4rnmoduler direkt fr\u00e5n minnesbufferten. <\/p>\n

F\u00f6r att demonstrera metoden har en prototyp av ett exploit f\u00f6rberetts, vilket m\u00f6jligg\u00f6r kodav execution p\u00e5 k\u00e4rnniv\u00e5 genom att ladda sin egen modul och helt st\u00e4nga av SELinux-skyddet, f\u00f6rutsatt att det finns begr\u00e4nsad root-\u00e5tkomst till systemet via SELinux.
\n
K\u00e4lla: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0431\u0445\u043e\u0434\u0430 \u0437\u0430\u043f\u0440\u0435\u0442\u0430 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u044f\u0434\u0440\u0430, \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432 targeted-\u043f\u0440\u0430\u0432\u0438\u043b\u0430\u0445 SELinux \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u0438\u0437\u0443\u0447\u0435\u043d\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 (\u043d\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u0435\u0442\u0441\u044f, \u043e \u043a\u0430\u043a\u043e\u043c \u0438\u043c\u0435\u043d\u043d\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0435 \u0440\u0435\u0447\u044c \u0438 \u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e 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\u0437\u0430\u0433\u0440\u0443\u0437\u0438\u0442\u044c \u043c\u043e\u0434\u0443\u043b\u044c \u0438\u0437 \u0444\u0430\u0439\u043b\u0430 \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c\u0443 \u0432 […]<\/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-108845","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\udd47Kringg\u00e5 SELinux-restriktioner relaterade till laddning av k\u00e4rnmoduler | ProHoster","description":"M\u00f6jligheten att kringg\u00e5 f\u00f6rbudet mot att ladda k\u00e4rnmoduler, som implementerats i targeted-reglerna f\u00f6r SELinux p\u00e5 en av de studerade enheterna, har demonstrerats (det anges inte vilken enhet det handlar om och hur stort problemet \u00e4r.","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","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\u041e\u0431\u0445\u043e\u0434 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 SELinux, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u043e\u0439 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u044f\u0434\u0440\u0430 | ProHoster","og:description":"\u041f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0431\u0445\u043e\u0434\u0430 \u0437\u0430\u043f\u0440\u0435\u0442\u0430 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u044f\u0434\u0440\u0430, \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432 targeted-\u043f\u0440\u0430\u0432\u0438\u043b\u0430\u0445 SELinux \u043d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u0438\u0437\u0443\u0447\u0435\u043d\u043d\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 (\u043d\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u0435\u0442\u0441\u044f, \u043e \u043a\u0430\u043a\u043e\u043c \u0438\u043c\u0435\u043d\u043d\u043e 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\u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430.","og:url":"https:\/\/prohoster.info\/sv\/blog\/news\/obhod-ogranichenij-selinux-svyazannyh-s-zagruzkoj-modulej-yadra","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":"2023-06-05T13:10:26+00:00","article:modified_time":"2023-06-05T15:18:04+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\/sv\/wp-json\/wp\/v2\/posts\/108845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/comments?post=108845"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/108845\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/media?parent=108845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/categories?post=108845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/tags?post=108845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}