{"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\/ro\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","title":{"rendered":"Vulnerabilit\u0103\u021bile din Netfilter \u0219i io_uring, care permit cre\u0219terea privilegiilor \u00een sistem.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00cen subsistemele nucleului Linux Netfilter \u0219i io_uring au fost identificate vulnerabilit\u0103\u021bi care permit unui utilizator local s\u0103 \u00ee\u0219i creasc\u0103 privilegile \u00een sistem:  <\/p>\n<ul>\n<li class=\"l\"> Vulnerabilitatea (CVE-2023-32233) din subsistemul Netfilter, cauzat\u0103 de accesarea memoriei dup\u0103 eliberare (use-after-free) \u00een modulul nf_tables, care asigur\u0103 func\u021bionarea filtrului de pachete nftables. Vulnerabilitatea poate fi exploatat\u0103 prin trimiterea unor cereri special concepute pentru actualizarea configura\u021biei nftables. Pentru a efectua atacul, este necesar accesul la nftables, care poate fi ob\u021binut \u00eentr-un spa\u021biu de nume de re\u021bea (network namespaces) cu drepturile CLONE_NEWUSER, CLONE_NEWNS sau CLONE_NEWNET (de exemplu, \u00een cazul \u00een care este permis\u0103 lansarea unui container izolat).\n<p>Pentru a oferi utilizatorilor timp s\u0103 instaleze actualiz\u0103rile, cercet\u0103torul care a identificat problema a promis s\u0103 am\u00e2ne cu o s\u0103pt\u0103m\u00e2n\u0103 (p\u00e2n\u0103 pe 15 mai) publicarea informa\u021biilor detaliate \u0219i a unui exemplu de exploit func\u021bional care ofer\u0103 root shell. Vulnerabilitatea a fost remediat\u0103 \u00een actualizarea 6.4-rc1. Urm\u0103rirea remedierii vulnerabilit\u0103\u021bii \u00een distribu\u021bii poate fi realizat\u0103 pe paginile: Debian, Ubuntu, Gentoo, RHEL, Fedora, SUSE\/openSUSE, Arch.      <\/p>\n<li class=\"l\"> Vulnerabilitatea (CVE \u00eenc\u0103 nesuplicat\u0103) \u00een implementarea interfe\u021bei de intrare\/ie\u0219ire asincron\u0103 io_uring, parte din nucleul Linux \u00eencep\u00e2nd cu versiunea 5.1. Problema este cauzat\u0103 de o eroare \u00een func\u021bia io_sqe_buffer_register, care permite accesul la memoria fizic\u0103 dincolo de buffer-ul alocat static. Problema se manifest\u0103 doar \u00een ramura 6.3 \u0219i va fi remediat\u0103 \u00een actualizarea 6.3.2 ce se preg\u0103te\u0219te. Un prototip func\u021bional de exploit pentru testare este deja disponibil, permi\u021b\u00e2nd executarea de cod cu privilegii de nucleu.\n<ul>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59101\">opennet.ro<\/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 5.0.2.1 - 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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Netfilter.","canonical_url":"https:\/\/prohoster.info\/ro\/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":"ro_RO","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 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Netfilter.","og:url":"https:\/\/prohoster.info\/ro\/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\/ro\/wp-json\/wp\/v2\/posts\/108438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/comments?post=108438"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/108438\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/media?parent=108438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/categories?post=108438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/tags?post=108438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}