{"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\/cs\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","title":{"rendered":"Zranitelnosti v Netfilter a io_uring, umo\u017e\u0148uj\u00edc\u00ed zv\u00fd\u0161en\u00ed sv\u00fdch opr\u00e1vn\u011bn\u00ed v syst\u00e9mu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byly odhaleny zranitelnosti v subsyst\u00e9mech j\u00e1dra Linux Netfilter a io_uring, kter\u00e9 umo\u017e\u0148uj\u00ed m\u00edstn\u00edmu u\u017eivateli zv\u00fd\u0161it sv\u00e9 privilegium v syst\u00e9mu:  <\/p>\n<ul>\n<li class=\"l\"> Zranitelnost (CVE-2023-32233) v subsyst\u00e9mu Netfilter, zp\u016fsoben\u00e1 p\u0159\u00edstupem do pam\u011bti po jej\u00edm uvoln\u011bn\u00ed (use-after-free) v modulu nf_tables, kter\u00fd zaji\u0161\u0165uje fungov\u00e1n\u00ed paketov\u00e9ho filtru nftables. Zranitelnost m\u016f\u017ee b\u00fdt zneu\u017eita zasl\u00e1n\u00edm speci\u00e1ln\u011b upraven\u00fdch po\u017eadavk\u016f na aktualizaci konfigurace nftables. K proveden\u00ed \u00fatoku je nutn\u00fd p\u0159\u00edstup k nftables, kter\u00fd lze z\u00edskat v samostatn\u00e9m s\u00ed\u0165ov\u00e9m jmenn\u00e9m prostoru (network namespaces) p\u0159i spln\u011bn\u00ed pr\u00e1v CLONE_NEWUSER, CLONE_NEWNS nebo CLONE_NEWNET (nap\u0159\u00edklad p\u0159i mo\u017enosti spu\u0161t\u011bn\u00ed izolovan\u00e9ho kontejneru).\n<p>Aby dal u\u017eivatel\u016fm \u010das na instalaci aktualizac\u00ed, v\u00fdzkumn\u00edk, kter\u00fd probl\u00e9m odhalil, sl\u00edbil odlo\u017eit o t\u00fdden (do 15. kv\u011btna) publikaci podrobn\u00fdch informac\u00ed a p\u0159\u00edkladu funk\u010dn\u00edho exploit, kter\u00fd poskytuje root shell. Zranitelnost byla odstran\u011bna v aktualizaci 6.4-rc1. Opravy zranitelnosti v distribuc\u00edch lze sledovat na str\u00e1nk\u00e1ch: Debian, Ubuntu, Gentoo, RHEL, Fedora, SUSE\/openSUSE, Arch.      <\/p>\n<li class=\"l\"> Zranitelnost (CVE zat\u00edm nebyl p\u0159id\u011blen) v implementaci rozhran\u00ed asynchronn\u00edho vstupu\/v\u00fdstupu io_uring, kter\u00e9 je sou\u010d\u00e1st\u00ed j\u00e1dra Linux od verze 5.1. Probl\u00e9m je zp\u016fsoben chybou v funkci io_sqe_buffer_register, kter\u00e1 umo\u017e\u0148uje p\u0159\u00edstup k fyzick\u00e9 pam\u011bti mimo staticky p\u0159id\u011blen\u00fd buffer. Probl\u00e9m se projevuje pouze ve v\u011btvi 6.3 a bude odstran\u011bn v p\u0159ipravovan\u00e9 aktualizaci 6.3.2. Pro testov\u00e1n\u00ed je ji\u017e k dispozici funk\u010dn\u00ed prototyp exploit, kter\u00fd umo\u017e\u0148uje prov\u00e1d\u011bt k\u00f3d s privilegii j\u00e1dra.\n<ul>\n<br \/>Zdroj: <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 \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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\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\" \/>\n\t\t<meta property=\"og: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 \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.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2023-05-09T10:48:21+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-05-10T06:54:54+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Zranitelnosti v Netfilter a io_uring, kter\u00e9 umo\u017e\u0148uj\u00ed zv\u00fd\u0161it privilegium v syst\u00e9mu | ProHoster","description":"Byly odhaleny zranitelnosti v subsyst\u00e9mech j\u00e1dra Linux Netfilter a io_uring, kter\u00e9 umo\u017e\u0148uj\u00ed m\u00edstn\u00edmu u\u017eivateli zv\u00fd\u0161it sv\u00e9 privilegium v syst\u00e9mu: Zranitelnost (CVE-2023-32233) v subsyst\u00e9mu Netfilter.","canonical_url":"https:\/\/prohoster.info\/cs\/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":"cs_CZ","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\/cs\/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\/cs\/wp-json\/wp\/v2\/posts\/108438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=108438"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/108438\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=108438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=108438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=108438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}