{"id":181731,"date":"2026-05-25T20:48:17","date_gmt":"2026-05-25T18:48:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novaya-uyazvimost-v-rewrite-module-nginx"},"modified":"2026-05-25T20:48:17","modified_gmt":"2026-05-25T18:48:17","slug":"novaya-uyazvimost-v-rewrite-module-nginx","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/novaya-uyazvimost-v-rewrite-module-nginx","title":{"rendered":"\u00daj sebezhet\u0151s\u00e9g a nginx rewrite modulj\u00e1ban","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>      <\/p>\n<p>R\u00f6viddel a felfedez\u00e9s ut\u00e1n <a rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/18295901\">18 \u00e9ves<\/a> potenci\u00e1lis RCE-t m\u00e9g egy m\u00e1sikat is felfedeztek <a rel=\"nofollow\" href=\"https:\/\/www.cve.org\/CVERecord?id=CVE-2026-9256\">CVE-2026-9256<\/a>, ez\u00fattal m\u00e9g hosszabb ideig&nbsp;&mdash; 21 \u00e9vig, a 0.1.17-es verzi\u00f3t\u00f3l kezdve, amelyet 2005 elej\u00e9n adtak ki.<\/noindex><br \/>\nA sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1hoz sz\u00fcks\u00e9ges, hogy a szerver konfigur\u00e1ci\u00f3j\u00e1ban legyen egy rewrite direkt\u00edva, amelynek:\n<\/p>\n<ul>\n<li> az els\u0151 argumentumban \u00e1tfed\u0151 kiemelt regul\u00e1ris kifejez\u00e9s param\u00e9terek tal\u00e1lhat\u00f3k,\n<\/li>\n<li> a m\u00e1sodikban pedig kett\u0151 vagy t\u00f6bb k\u00f6z\u00fcl\u00fck, de v\u00e1ltoz\u00f3k nincsenek haszn\u00e1latban,\n<\/li>\n<li> ezalatt vagy a \"redirect\" t\u00edpus van megadva, vagy a m\u00e1sodik param\u00e9ter adatai a k\u00e9rd\u0151jel ut\u00e1n tal\u00e1lhat\u00f3k.\n<\/li>\n<\/ul>\n<p>\nP\u00e9ld\u00e1k:<br \/>\nrewrite ^\\\/((.*))$ http:\\\/\\\/127.0.0.1:8080\\\/$1$2 redirect;<br \/>\nrewrite ^\\\/((.*))$ http:\\\/\\\/127.0.0.1:8080\\\/?$1$2;<\/p>\n<p>Mindkett\u0151 puffer t\u00fall\u00e9p\u00e9st kap, amikor a \"\/++++++++++++++++++++++++++++++\" k\u00e9r\u00e9s kezel\u00e9s\u00e9re ker\u00fcl sor.<\/p>\n<p>Ahogy az el\u0151z\u0151 sebezhet\u0151s\u00e9g eset\u00e9ben, itt is a sz\u00e1m\u00edtott pufferhossz nem felt\u00e9tlen\u00fcl egyezik meg a t\u00e9nylegesen be\u00edrt adatok mennyis\u00e9g\u00e9vel&nbsp;&mdash; a hossz kisz\u00e1m\u00edt\u00e1sakor nem mindenhol vett\u00e9k figyelembe a lehets\u00e9ges escape-el\u00e9st.<\/p>\n<p>A fent eml\u00edtett probl\u00e9m\u00e1k a nginx m\u0171k\u00f6d\u00e9s\u00e9nek \u00f6sszeoml\u00e1s\u00e1hoz vezethetnek, \u00e9s ALSR hi\u00e1ny\u00e1ban RCE-hez. Mint enyh\u00edt\u0151 k\u00f6r\u00fclm\u00e9ny megeml\u00edthet\u0151, hogy a sebezhet\u0151 konstrukci\u00f3k el\u0151fordul\u00e1s\u00e1nak val\u00f3sz\u00edn\u0171s\u00e9ge kisebb a konfigur\u00e1ci\u00f3ban, mint legut\u00f3bb.<\/p>\n<p>A hiba a 1.30.2 \u00e9s 1.31.1 verzi\u00f3kban van jav\u00edtva (<a rel=\"nofollow\" href=\"https:\/\/github.com\/nginx\/nginx\/commit\/ca4f92a27464ae6c2082245e4f67048c633aa032\">jav\u00edt\u00f3 commit<\/a>).\n<\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/18300022\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u043a\u043e\u0440\u0435 \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f 18-\u043b\u0435\u0442\u043d\u0435\u0433\u043e \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0433\u043e RCE \u0431\u044b\u043b\u043e \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043e \u0435\u0449\u0451 \u043e\u0434\u043d\u043e, CVE-2026-9256, \u043d\u0430 \u044d\u0442\u043e\u0442 \u0440\u0430\u0437 \u043f\u0440\u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043e\u0432\u0430\u0432\u0448\u0435\u0435 \u0435\u0449\u0451 \u0434\u043e\u043b\u044c\u0448\u0435&nbsp;&mdash; 21 \u0433\u043e\u0434, \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 0.1.17, \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0439 \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 2005 \u0433\u043e\u0434\u0430. \u0414\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0435 \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u044b rewrite, \u0443 \u043a\u043e\u0442\u043e\u0440\u043e\u0439: \u0432 \u043f\u0435\u0440\u0432\u043e\u043c \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u0435 \u0438\u043c\u0435\u044e\u0442\u0441\u044f \u043f\u0435\u0440\u0435\u043a\u0440\u044b\u0432\u0430\u044e\u0449\u0438\u0435\u0441\u044f \u0432\u044b\u0434\u0435\u043b\u044f\u0435\u043c\u044b\u0435 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u043e\u0433\u043e \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f, \u0432\u043e \u0432\u0442\u043e\u0440\u043e\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u0432\u0430 \u0438\u043b\u0438 \u0431\u043e\u043b\u044c\u0448\u0435 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181731","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\u0441\u043a\u043e\u0440\u0435 \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f 18-\u043b\u0435\u0442\u043d\u0435\u0433\u043e \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0433\u043e RCE \u0431\u044b\u043b\u043e \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043e \u0435\u0449\u0451 \u043e\u0434\u043d\u043e,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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