{"id":112516,"date":"2023-12-27T03:10:17","date_gmt":"2023-12-27T01:10:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-s-vozmozhnostyu-lokalnoj-ekspluataczii-cherez-nftables"},"modified":"2023-12-27T03:10:17","modified_gmt":"2023-12-27T01:10:17","slug":"uyazvimost-v-yadre-linux-s-vozmozhnostyu-lokalnoj-ekspluataczii-cherez-nftables","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-yadre-linux-s-vozmozhnostyu-lokalnoj-ekspluataczii-cherez-nftables","title":{"rendered":"Hib\u00e1k az Linux kernelben, amelyek helyi kihaszn\u00e1l\u00e1st tesznek lehet\u0151v\u00e9 az nftables-en kereszt\u00fcl","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>      <noindex><\/p>\n<p><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2023\/12\/22\/6\">Felfedezett sebezhet\u0151s\u00e9g<\/a> a Netfilter alrendszer\u00e9ben (<a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2023-6817\">CVE-2023-6817<\/a>), amely elvileg lehet\u0151v\u00e9 teheti a helyi felhaszn\u00e1l\u00f3k sz\u00e1m\u00e1ra, hogy emelj\u00e9k a jogosults\u00e1gaikat a rendszerben. A probl\u00e9ma gy\u00f6kere a felszabad\u00edtott mem\u00f3ria (use-after-free) haszn\u00e1lat\u00e1ban rejlik a nf_tables modulban, amely a nftables csomagsz\u0171r\u00e9si funkci\u00f3j\u00e1\u00e9rt felel\u0151s.<\/p>\n<p><\/noindex><\/noindex>  <noindex><\/p>\n<p>S\u00e9r\u00fcl\u00e9kenys\u00e9g <a rel=\"nofollow\" href=\"https:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/torvalds\/linux.git\/commit\/?id=3c4287f62044\">aktu\u00e1lis<\/a> a Linux 5.6 kernel verzi\u00f3 \u00f3ta. A jav\u00edt\u00e1s <a rel=\"nofollow\" href=\"https:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/torvalds\/linux.git\/commit\/?id=317eb9685095678f2c9f5a8189de698c5354316a\">aj\u00e1nlott<\/a> a Linux 6.7-rc5 kernel teszthez k\u00e9sz\u00fclt kiad\u00e1sban megtal\u00e1lhat\u00f3, \u00e9s be\u00e9p\u00edt\u00e9sre ker\u00fclt a jelenlegi stabil \u00e1gakba: 5.10.204, 5.15.143, 6.1.68 \u00e9s 6.6.7.<\/p>\n<p><\/noindex> <noindex><\/p>\n<p>A probl\u00e9ma a nft_pipapo_walk f\u00fcggv\u00e9ny hib\u00e1j\u00e1b\u00f3l ered, amely nem ellen\u0151rzi a duplik\u00e1tumok jelenl\u00e9t\u00e9t a PIPAPO (Pile Packet Policies) elemek \u00e1tvizsg\u00e1l\u00e1sa sor\u00e1n. Ez kett\u0151s mem\u00f3riafelszabad\u00edt\u00e1shoz vezet. A sikeres t\u00e1mad\u00e1shoz nftables-hez val\u00f3 hozz\u00e1f\u00e9r\u00e9s sz\u00fcks\u00e9ges, amely megszerezhet\u0151 CAP_NET_ADMIN jogokkal b\u00e1rmely felhaszn\u00e1l\u00f3i n\u00e9vt\u00e9rben vagy h\u00e1l\u00f3zati n\u00e9vt\u00e9rben. Ezek a jogok p\u00e9ld\u00e1ul izol\u00e1lt kont\u00e9nerekben is biztos\u00edthat\u00f3k. Rendszerei ellen\u0151rz\u00e9s\u00e9hez <a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2023\/12\/22\/6\/1\">megjelent<\/a> az exploit protot\u00edpusa.<\/p>\n<p><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/17465125\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 Netfilter (CVE-2023-6817), \u043a\u043e\u0442\u043e\u0440\u0430\u044f, \u0432 \u0442\u0435\u043e\u0440\u0438\u0438, \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0430 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0438\u0445 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u041a\u043e\u0440\u0435\u043d\u044c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043a\u0440\u043e\u0435\u0442\u0441\u044f \u0432 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 (use-after-free) \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 nf_tables, \u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u043c \u0437\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \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 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u0430 \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 \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 \u0432\u043d\u0435\u0441\u0435\u043d\u043e \u0432 [&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-112516","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 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