{"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\/sl\/blog\/news\/uyazvimosti-v-netfilter-i-io_uring-pozvolyayushhie-povysit-svoi-privilegii-v-sisteme","title":{"rendered":"Ranljivosti v Netfilter in io_uring, ki omogo\u010dajo povi\u0161anje privilegijev v sistemu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V podsystemih jedra Linux Netfilter in io_uring so bile odkrite ranljivosti, ki omogo\u010dajo lokalnim uporabnikom, da zvi\u0161ajo svoje privilegije v sistemu:  <\/p>\n<ul>\n<li class=\"l\"> Ranljivost (CVE-2023-32233) v podsystemu Netfilter, ki je posledica dostopa do pomnilnika po njegovi osvoboditvi (use-after-free) v modulu nf_tables, ki zagotavlja delovanje filtriranja paketov nftables. Ranljivost se lahko izkori\u0161\u010da z uporabo posebej pripravljenih zahtevkov za posodobitev konfiguracije nftables. Za izvedbo napada je potrebna dostopnost do nftables, kar je mogo\u010de dose\u010di v lo\u010denem omre\u017enem imenskem prostoru (network namespaces) ob prisotnosti pravic CLONE_NEWUSER, CLONE_NEWNS ali CLONE_NEWNET (na primer, pri mo\u017enosti zagon izoliranega kontejnerja).\n<p>Da bi uporabnikom dali \u010das za namestitev posodobitev, je raziskovalec, ki je odkril te\u017eavo, obljubil, da bo objavo podrobnih informacij in delujo\u010dega eksploita, ki zagotavlja root shell, odlo\u017eil za en teden (do 15. maja). Ranljivost je odprav\u043b\u0435\u043d\u0430 v posodobitvi 6.4-rc1. Sledenje odpravi ranljivosti v distribucijah je mogo\u010de na straneh: Debian, Ubuntu, Gentoo, RHEL, Fedora, SUSE\/openSUSE, Arch.      <\/p>\n<li class=\"l\"> Ranljivost (CVE \u0161e ni dodeljena) v implementaciji vmesnika asinhronega vnosa\/izvleka io_uring, ki je del jedra Linux od izida 5.1. Te\u017eava je posledica napake v funkciji io_sqe_buffer_register, ki omogo\u010da dostop do fizi\u010dne pomnilnika zunaj stati\u010dno dodeljenega pomnilnika. Te\u017eava se pojavlja samo v veji 6.3 in bo odpravljena v pripravljenem posodobitvi 6.3.2. Za testiranje je na voljo delujo\u010di prototip eksploita, ki omogo\u010da izvajanje kode s privilegiji jedra.\n<ul>\n<br \/>Izvor: <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 5.0.4 - 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omogo\u010dajo zvi\u0161anje privilegijev v sistemu | ProHoster","description":"V podsystemih jedra Linux Netfilter in io_uring so bile odkrite ranljivosti, ki omogo\u010dajo lokalnim uporabnikom, da zvi\u0161ajo svoje privilegije v sistemu: Ranljivost (CVE-2023-32233) v podsystemu Netfilter.","canonical_url":"https:\/\/prohoster.info\/sl\/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":"sl_SI","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\/sl\/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\/sl\/wp-json\/wp\/v2\/posts\/108438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/comments?post=108438"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/posts\/108438\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/media?parent=108438"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/categories?post=108438"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sl\/wp-json\/wp\/v2\/tags?post=108438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}