{"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\/de\/blog\/novosti-interneta\/novaya-uyazvimost-v-rewrite-module-nginx","title":{"rendered":"Neue Schwachstelle im Rewrite-Modul von Nginx","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>      <\/p>\n<p>Kurz nach der Entdeckung <a rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/18295901\">einer 18-j\u00e4hrigen<\/a> potenziellen RCE wurde eine weitere Schwachstelle entdeckt, <a rel=\"nofollow\" href=\"https:\/\/www.cve.org\/CVERecord?id=CVE-2026-9256\">CVE-2026-9256<\/a>, diesmal noch l\u00e4nger gehalten&nbsp;&mdash; 21 Jahr, beginnend mit Version 0.1.17, die Anfang 2005 ver\u00f6ffentlicht wurde.<\/noindex><br \/>\nUm die Schwachstelle auszunutzen, muss im Server-Config die Rewrite-Direktive vorhanden sein, bei der:\n<\/p>\n<ul>\n<li> im ersten Argument sich \u00fcberschneidende, herausgehobene Parameter des regul\u00e4ren Ausdrucks vorhanden sind,\n<\/li>\n<li> im zweiten zwei oder mehr hiervon verwendet werden, jedoch keine Variablen verwendet werden,\n<\/li>\n<li> wobei entweder der Typ &#171;redirect&#187; angegeben ist oder die Parameter im zweiten Argument nach dem Fragezeichen stehen.\n<\/li>\n<\/ul>\n<p>\nBeispiele:<br \/>\nrewrite ^\/((.*))$ http:\/\/127.0.0.1:8080\/$1$2 redirect;<br \/>\nrewrite ^\/((.*))$ http:\/\/127.0.0.1:8080\/?$1$2;<\/p>\n<p>Beide werden einen Buffer Overflow bei der Verarbeitung der Anfrage &#171;\/++++++++++++++++++++++++++++++&#187; erhalten.<\/p>\n<p>Wie bei der vorherigen Schwachstelle kann die berechnete L\u00e4nge des Puffers von der tats\u00e4chlichen Anzahl der darin geschriebenen Daten abweichen&nbsp;&mdash; bei der L\u00e4ngenberechnung wurde nicht \u00fcberall die m\u00f6gliche Escape-Sequenz ber\u00fccksichtigt.<\/p>\n<p>Das oben Beschriebene kann zu einem Absturz des nginx-Arbeitsprozesses f\u00fchren und bei fehlendem ASLR&nbsp;&mdash; zu RCE. Als milderndes Element ist zu erw\u00e4hnen, dass es weniger wahrscheinlich ist, anf\u00e4llige Konstruktionen im Konfigurationsfile zu finden als beim letzten Mal.<\/p>\n<p>Der Fehler wurde in den Versionen 1.30.2 und 1.31.1 behoben (<a rel=\"nofollow\" href=\"https:\/\/github.com\/nginx\/nginx\/commit\/ca4f92a27464ae6c2082245e4f67048c633aa032\">Commit zur Behebung<\/a>).\n<\/p>\n<p>Quelle: <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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - 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, CVE-2026-9256, \u043d\u0430 \u044d\u0442\u043e\u0442 \u0440\u0430\u0437 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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\u041d\u043e\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 rewrite-\u043c\u043e\u0434\u0443\u043b\u0435 nginx | ProHoster\" \/>\n\t\t<meta property=\"og: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, 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 \u2014 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\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/novaya-uyazvimost-v-rewrite-module-nginx\" \/>\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=\"2026-05-25T18:48:17+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-05-25T18:48:17+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\udd47Neue Schwachstelle im Rewrite-Modul von nginx | ProHoster","description":"Kurz nach der Entdeckung einer 18-j\u00e4hrigen potenziellen RCE wurde eine weitere, CVE-2026-9256, entdeckt, die sogar noch l\u00e4nger existierte \u2014 21 Jahre, beginnend mit Version 0.1.17, die Anfang 2005 ver\u00f6ffentlicht 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Um die Schwachstelle auszunutzen, muss die Serverkonfiguration die Directive rewrite enthalten, wobei im ersten Argument \u00fcberlappende ausw\u00e4hlbare Parameter des regul\u00e4ren Ausdrucks vorhanden sind und im zweiten zwei oder mehr verwendet werden.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/novaya-uyazvimost-v-rewrite-module-nginx","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","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\u041d\u043e\u0432\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 rewrite-\u043c\u043e\u0434\u0443\u043b\u0435 nginx | ProHoster","og:description":"\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 \u2014 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","og:url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/novaya-uyazvimost-v-rewrite-module-nginx","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":"2026-05-25T18:48:17+00:00","article:modified_time":"2026-05-25T18:48:17+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\/de\/wp-json\/wp\/v2\/posts\/181731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/comments?post=181731"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/posts\/181731\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/media?parent=181731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/categories?post=181731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/de\/wp-json\/wp\/v2\/tags?post=181731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}