{"id":108438,"date":"2023-05-09T12:48:21","date_gmt":"2023-05-09T10:48:21","guid":{"rendered":"https:\/\/prohoster.info\/?p=108438"},"modified":"2023-05-10T08:54:54","modified_gmt":"2023-05-10T06:54:54","slug":"uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","title":{"rendered":"A Netfilter \u00e9s io_uring sebezhet\u0151s\u00e9gei lehet\u0151v\u00e9 teszik a helyi felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra a rendszer privil\u00e9giumaik n\u00f6vel\u00e9s\u00e9t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Linux kernel Netfilter \u00e9s io_uring alrendszereiben olyan sebezhet\u0151s\u00e9gek bukkantak fel, amelyek lehet\u0151v\u00e9 teszik a helyi felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra a rendszerben val\u00f3 jogosults\u00e1guk n\u00f6vel\u00e9s\u00e9t.  <\/p>\n<ul>\n<li class=\"l\"> A Netfilter alrendszer\u00e9ben tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9g (CVE-2023-32233) az nf_tables modulban tal\u00e1lhat\u00f3 mem\u00f3riakezel\u00e9si hiba miatt keletkezik, amely lehet\u0151v\u00e9 teszi a mem\u00f3ria \u00fajrahaszn\u00e1lat\u00e1t (use-after-free). A sebezhet\u0151s\u00e9g kiakn\u00e1z\u00e1s\u00e1hoz kifejezetten megform\u00e1lt nftables konfigur\u00e1ci\u00f3s friss\u00edt\u00e9si k\u00e9r\u00e9sek k\u00fcld\u00e9s\u00e9re van sz\u00fcks\u00e9g. A t\u00e1mad\u00e1shoz hozz\u00e1f\u00e9r\u00e9s sz\u00fcks\u00e9ges az nftables-hez, amelyet elk\u00fcl\u00f6n\u00edtett h\u00e1l\u00f3zati n\u00e9vt\u00e9r (network namespaces) alatt lehet el\u00e9rni, ha rendelkezik CLONE_NEWUSER, CLONE_NEWNS vagy CLONE_NEWNET jogokkal (p\u00e9ld\u00e1ul izol\u00e1lt tart\u00e1ly ind\u00edt\u00e1sa eset\u00e9n).\n<p>A felhaszn\u00e1l\u00f3knak a friss\u00edt\u00e9sek telep\u00edt\u00e9s\u00e9re adott id\u0151 miatt a probl\u00e9m\u00e1t felfed\u0151 kutat\u00f3 meg\u00edg\u00e9rte, hogy egy h\u00e9ttel (m\u00e1jus 15-ig) elhalasztja a r\u00e9szletes inform\u00e1ci\u00f3k \u00e9s a root shellt biztos\u00edt\u00f3 m\u0171k\u00f6d\u0151 exploit p\u00e9lda k\u00f6zz\u00e9t\u00e9tel\u00e9t. A sebezhet\u0151s\u00e9get a 6.4-rc1 friss\u00edt\u00e9sben jav\u00edtott\u00e1k. A sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1t a disztrib\u00faci\u00f3k oldalain lehet nyomon k\u00f6vetni: Debian, Ubuntu, Gentoo, RHEL, Fedora, SUSE\/openSUSE, Arch.      <\/p>\n<li class=\"l\"> A Linux kernelbe 5.1-es kiad\u00e1sa \u00f3ta be\u00e9p\u00edtett io_uring aszinkron bemeneti\/kimeneti interf\u00e9sz megval\u00f3s\u00edt\u00e1s\u00e1ban egy sebezhet\u0151s\u00e9g (CVE m\u00e9g nem lett hozz\u00e1rendelve) tal\u00e1lhat\u00f3. A probl\u00e9ma az io_sqe_buffer_register f\u00fcggv\u00e9ny hib\u00e1j\u00e1b\u00f3l ered, amely lehet\u0151v\u00e9 teszi a fizikai mem\u00f3ria el\u00e9r\u00e9s\u00e9t a statikusan lefoglalt puffer hat\u00e1rain k\u00edv\u00fcl. A probl\u00e9ma csak a 6.3-as \u00e1gon jelentkezik, \u00e9s a tervezett 6.3.2-es friss\u00edt\u00e9sben fogj\u00e1k jav\u00edtani. A tesztel\u00e9shez m\u00e1r el\u00e9rhet\u0151 egy m\u0171k\u00f6d\u0151 exploit protot\u00edpus, amely lehet\u0151v\u00e9 teszi a kernel jogosults\u00e1g\u00fa k\u00f3d futtat\u00e1s\u00e1t.\n<ul>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59101\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u044f\u0434\u0440\u0430 Linux Netfilter \u0438 io_uring \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435: \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-32233) \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 Netfilter, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u0430\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (use-after-free) \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 nf_tables, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u043c \u0440\u0430\u0431\u043e\u0442\u0443 \u043f\u0430\u043a\u0435\u0442\u043d\u043e\u0433\u043e \u0444\u0438\u043b\u044c\u0442\u0440\u0430 nftables. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043d\u0430 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 nftables. \u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0430\u0442\u0430\u043a\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f [&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-108438","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=\"\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u044f\u0434\u0440\u0430 Linux Netfilter \u0438 io_uring \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c 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alrendszer\u00e9ben.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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\u0438 \u0432 Netfilter \u0438 io_uring, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 | ProHoster","og:description":"\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u044f\u0434\u0440\u0430 Linux Netfilter \u0438 io_uring \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435: \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-32233) \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 Netfilter.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","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":"2023-05-09T10:48:21+00:00","article:modified_time":"2023-05-10T06:54:54+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\/hu\/wp-json\/wp\/v2\/posts\/108438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=108438"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/108438\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=108438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=108438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=108438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}