{"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\/pt\/blog\/news\/novaya-uyazvimost-v-rewrite-module-nginx","title":{"rendered":"Nova vulnerabilidade no m\u00f3dulo rewrite do nginx","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>      <\/p>\n<p>Logo ap\u00f3s a descoberta <a rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/18295901\">de 18 anos<\/a> de um RCE potencial, foi descoberta outra, <a rel=\"nofollow\" href=\"https:\/\/www.cve.org\/CVERecord?id=CVE-2026-9256\">CVE-2026-9256<\/a>, desta vez durando ainda mais&nbsp;&mdash; 21 ano, come\u00e7ando com a vers\u00e3o 0.1.17, lan\u00e7ada no in\u00edcio de 2005.<\/noindex><br \/>\nPara explorar a vulnerabilidade, \u00e9 necess\u00e1rio que o arquivo de configura\u00e7\u00e3o do servidor contenha a diretiva rewrite, onde:\n<\/p>\n<ul>\n<li> o primeiro argumento cont\u00e9m par\u00e2metros de express\u00e3o regular sobrepostos,\n<\/li>\n<li> no segundo utiliza-se dois ou mais deles, mas n\u00e3o s\u00e3o usadas vari\u00e1veis,\n<\/li>\n<li> neste caso, ou o tipo &#171;redirect&#187; \u00e9 especificado, ou os par\u00e2metros no segundo argumento est\u00e3o ap\u00f3s o sinal de interroga\u00e7\u00e3o.\n<\/li>\n<\/ul>\n<p>\nExemplos:<br \/>\nrewrite ^\\\/((.*))$ http:\\\/\\\/127.0.0.1:8080\\\/$1$2 redirect;<br \/>\nrewrite ^\\\/((.*))$ http:\\\/\\\/127.0.0.1:8080\\\/?$1$2;<\/p>\n<p>Ambos sofrer\u00e3o de estouro de buffer ao processar a solicita\u00e7\u00e3o &#171;\\\/++++++++++++++++++++++++++++++&#187;.<\/p>\n<p>Assim como na vulnerabilidade anterior, nesta situa\u00e7\u00e3o a comprimento calculado do buffer pode n\u00e3o coincidir com a quantidade real de dados gravados nele&nbsp;&mdash; no c\u00e1lculo do comprimento, n\u00e3o foram considerados em todos os lugares os poss\u00edveis escapamentos.<\/p>\n<p>O que foi descrito acima pode levar \u00e0 falha do processo de trabalho do nginx, e na aus\u00eancia de ALSR&nbsp;&mdash; a RCE. Como um atenuante, pode-se notar a probabilidade ainda menor de encontrar constru\u00e7\u00f5es vulner\u00e1veis na configura\u00e7\u00e3o do que da \u00faltima vez.<\/p>\n<p>O erro foi corrigido nas vers\u00f5es 1.30.2 e 1.31.1 (<a rel=\"nofollow\" href=\"https:\/\/github.com\/nginx\/nginx\/commit\/ca4f92a27464ae6c2082245e4f67048c633aa032\">commit de corre\u00e7\u00e3o<\/a>).\n<\/p>\n<p>Fonte: <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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