{"id":112508,"date":"2023-12-26T15:10:15","date_gmt":"2023-12-26T13:10:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/lokalnaya-uyazvimost-v-yadre-linux-ekspluatiruemaya-cherez-nftables"},"modified":"2023-12-26T15:10:15","modified_gmt":"2023-12-26T13:10:15","slug":"lokalnaya-uyazvimost-v-yadre-linux-ekspluatiruemaya-cherez-nftables","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/lokalnaya-uyazvimost-v-yadre-linux-ekspluatiruemaya-cherez-nftables","title":{"rendered":"Helyi sebezhet\u0151s\u00e9g a Linux kernelben, amely nftables-en kereszt\u00fcl kihaszn\u00e1lhat\u00f3.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Netfilter alrendszerben egy sebezhet\u0151s\u00e9get (CVE-2023-6817) azonos\u00edtottak, amely potenci\u00e1lisan lehet\u0151v\u00e9 teszi a helyi felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy privilegiz\u00e1lt jogokat szerezzen a rendszerben. A probl\u00e9ma a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1ni hozz\u00e1f\u00e9r\u00e9sb\u0151l (use-after-free) ered, a nf_tables modulban, amely az nftables csomagsz\u0171r\u0151 m\u0171k\u00f6d\u00e9s\u00e9t biztos\u00edtja. A sebezhet\u0151s\u00e9g a Linux kernel 5.6-os verzi\u00f3j\u00e1t\u00f3l kezdve jelentkezik. A sebezhet\u0151s\u00e9g jav\u00edt\u00e1s\u00e1t a Linux kernel teszt verzi\u00f3j\u00e1ban (6.7-rc5) javasolt\u00e1k, \u00e9s \u00e1tvitt\u00e9k a legfrissebb stabil \u00e1gra (5.10.204, 5.15.143, 6.1.68 \u00e9s 6.6.7). <\/p>\n

A probl\u00e9ma a nft_pipapo_walk funkci\u00f3 hib\u00e1j\u00e1b\u00f3l ad\u00f3dik, amely miatt a PIPAPO (Pile Packet Policies) elemeinek bej\u00e1r\u00e1sa sor\u00e1n nem ellen\u0151rizt\u00e9k a duplik\u00e1tumok megl\u00e9t\u00e9t, ami a mem\u00f3ria k\u00e9tszeri felszabad\u00edt\u00e1s\u00e1hoz vezetett. A t\u00e1mad\u00e1shoz sz\u00fcks\u00e9ges a nftables-hez val\u00f3 hozz\u00e1f\u00e9r\u00e9s, amely megszerezhet\u0151 CAP_NET_ADMIN jogok birtok\u00e1ban b\u00e1rmely felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9ren (user namespace) vagy h\u00e1l\u00f3zati n\u00e9vt\u00e9ren (network namespace), amelyek p\u00e9ld\u00e1ul izol\u00e1lt kont\u00e9nerekben biztos\u00edthat\u00f3k. A rendszerek tesztel\u00e9s\u00e9re egy exploit protot\u00edpust tettek k\u00f6zz\u00e9.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 Netfilter \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-6817), \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \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. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \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 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 \u044f\u0434\u0440\u0430 Linux 5.6. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0432 \u0442\u0435\u0441\u0442\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 \u044f\u0434\u0440\u0430 Linux 6.7-rc5 \u0438 \u043f\u0435\u0440\u0435\u043d\u0435\u0441\u0435\u043d\u043e \u0432 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0435 \u0432\u0435\u0442\u043a\u0438 […]<\/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-112508","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\udd47Helyi sebezhet\u0151s\u00e9g a Linux kernelben, amely az nftables-on kereszt\u00fcl kihaszn\u00e1lhat\u00f3 | ProHoster","description":"A Netfilter alrendszerben egy sebezhet\u0151s\u00e9get (CVE-2023-6817) azonos\u00edtottak, amely potenci\u00e1lisan lehet\u0151v\u00e9 teszi a helyi felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy privilegiz\u00e1lt jogokat szerezzen a rendszerben.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/lokalnaya-uyazvimost-v-yadre-linux-ekspluatiruemaya-cherez-nftables","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\u041b\u043e\u043a\u0430\u043b\u044c\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u044f\u0434\u0440\u0435 Linux, \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u0447\u0435\u0440\u0435\u0437 nftables | ProHoster","og:description":"\u0412 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 Netfilter \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-6817), \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \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.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/lokalnaya-uyazvimost-v-yadre-linux-ekspluatiruemaya-cherez-nftables","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":"2023-12-26T13:10:15+00:00","article:modified_time":"2023-12-26T13:10:15+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\/112508","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=112508"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/112508\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=112508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=112508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=112508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}