{"id":123965,"date":"2025-05-03T15:05:07","date_gmt":"2025-05-03T13:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird"},"modified":"2025-05-03T15:05:07","modified_gmt":"2025-05-03T13:05:07","slug":"uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","title":{"rendered":"Vulnerabilidad en LibJS que permite ejecutar c\u00f3digo al abrir una p\u00e1gina en el navegador Ladybird","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se ha descubierto una vulnerabilidad en el motor JavaScript LibJS, utilizado en el navegador web Ladybird (CVE-2025-47154), que permite la ejecuci\u00f3n de c\u00f3digo en el sistema al procesar c\u00f3digo JavaScript especialmente dise\u00f1ado. La vulnerabilidad fue causada por la liberaci\u00f3n de memoria en el vector m_argument_values_buffer, al que todav\u00eda apuntaba un puntero en la estructura arguments_list, lo que provocaba el acceso a un \u00e1rea de memoria ya liberada. Hay un prototipo funcional del exploit disponible.    <\/p>\n<p>El investigador que identific\u00f3 el problema realiz\u00f3 pruebas de fuzzing en LibJS, durante las cuales se registraron 10 cierres inesperados. El an\u00e1lisis de uno de los fallos mostr\u00f3 que el problema puede ser explotado al procesar c\u00f3digo JavaScript. La vulnerabilidad permit\u00eda leer y escribir en \u00e1reas de memoria arbitrarias del proceso. La ejecuci\u00f3n del c\u00f3digo se organiz\u00f3 en el exploit mediante la sustituci\u00f3n del puntero de retorno de la funci\u00f3n de renderizado. A trav\u00e9s de la programaci\u00f3n orientada a retorno (ROP - Return-Oriented Programming, el exploit se forma a partir de fragmentos existentes de instrucciones de m\u00e1quina que terminan con una instrucci\u00f3n de retorno), se form\u00f3 una cadena para ejecutar la llamada al sistema execve para lanzar una aplicaci\u00f3n externa.        <center>  <video controls=\"\" style=\"width: 700px; height: 400px; max-width:100%\"><source src=\"https:\/\/jessie.cafe\/posts\/pwning-ladybirds-libjs\/files\/ladybird-uaf.mp4\" type=\"video\/mp4\"><\/video>  <\/center>        <\/p>\n<p>El navegador Ladybird es desarrollado por Andreas Kling, quien anteriormente trabaj\u00f3 en Nokia y estuvo involucrado en el desarrollo de KHTML, y luego en Apple fue uno de los desarrolladores de Safari. Actualmente, Ladybird se encuentra en la etapa de pre-alfa, siendo adecuado solo para uso de desarrolladores. Inicialmente, el proyecto se cre\u00f3 como una aplicaci\u00f3n para el sistema operativo SerenityOS, pero el verano pasado se convirti\u00f3 en un proyecto independiente y recibi\u00f3 una donaci\u00f3n de 1 mill\u00f3n de d\u00f3lares. El navegador est\u00e1 escrito en C++ (se ha decidido pasar al lenguaje Swift) y se distribuye bajo la licencia BSD. El proyecto tambi\u00e9n desarrolla su propio motor LibWeb, el int\u00e9rprete de JavaScript LibJS y bibliotecas relacionadas.<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63178\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 JavaScript-\u0434\u0432\u0438\u0436\u043a\u0435 LibJS, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432 web-\u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 Ladybird, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-47154), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e JavaScript-\u043a\u043e\u0434\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u0435\u043c \u043f\u0430\u043c\u044f\u0442\u0438 \u043d\u0430 \u0432\u0435\u043a\u0442\u043e\u0440 m_argument_values_buffer, \u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0441\u0442\u0430\u0432\u0430\u043b\u0441\u044f \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c \u0432 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435 arguments_list, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u043b\u043e \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u043e\u0439 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438. \u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u0440\u0430\u0431\u043e\u0447\u0438\u0439 \u043f\u043e\u0442\u043e\u0442\u0438\u043f \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430. \u0412\u044b\u044f\u0432\u0438\u0432\u0448\u0438\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043f\u0440\u043e\u0432\u0451\u043b fuzzing-\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 LibJS, [&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-123965","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 JavaScript-\u0434\u0432\u0438\u0436\u043a\u0435 LibJS, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432 web-\u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 Ladybird, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-47154), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f 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procesar c\u00f3digo JavaScript especialmente dise\u00f1ado.","canonical_url":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"es_ES","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\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 LibJS, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u043f\u0440\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u0438\u0438 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