{"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\/pt\/blog\/news\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","title":{"rendered":"Uma vulnerabilidade no LibJS que permite executar c\u00f3digo ao abrir uma p\u00e1gina no navegador Ladybird","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Uma vulnerabilidade (CVE-2025-47154) foi detectada no motor JavaScript LibJS, usado no navegador web Ladybird, que permite a execu\u00e7\u00e3o de c\u00f3digo malicioso na m\u00e1quina ao processar um c\u00f3digo JavaScript especialmente formatado. A vulnerabilidade resulta da libera\u00e7\u00e3o de mem\u00f3ria no vetor m_argument_values_buffer, para o qual ainda havia um ponteiro na estrutura arguments_list, levando ao acesso a uma \u00e1rea de mem\u00f3ria j\u00e1 liberada. Um prot\u00f3tipo funcional do exploit est\u00e1 dispon\u00edvel.    <\/p>\n<p>O pesquisador que identificou o problema realizou testes de fuzzing na LibJS, durante os quais foram registrados 10 encerramentos inesperados. A an\u00e1lise de uma das falhas revelou que a vulnerabilidade poderia ser explorada durante o processamento de c\u00f3digo JavaScript. A vulnerabilidade permitia a leitura e escrita em \u00e1reas de mem\u00f3ria arbitr\u00e1rias do processo. A execu\u00e7\u00e3o de c\u00f3digo foi organizada no exploit atrav\u00e9s da substitui\u00e7\u00e3o do ponteiro de retorno da fun\u00e7\u00e3o de renderiza\u00e7\u00e3o. Com a ajuda da programa\u00e7\u00e3o orientada a retorno (ROP - Return-Oriented Programming, o exploit \u00e9 formado a partir de pequenos peda\u00e7os de instru\u00e7\u00f5es de m\u00e1quina j\u00e1 existentes que terminam com uma instru\u00e7\u00e3o de retorno de controle), foi formada uma cadeia para executar a chamada de sistema execve para iniciar um aplicativo externo.        <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>O navegador Ladybird est\u00e1 sendo desenvolvido por Andreas Kling, que j\u00e1 trabalhou na Nokia e esteve envolvido no desenvolvimento do KHTML, e depois na Apple foi um dos desenvolvedores do Safari. Atualmente, o Ladybird encontra-se em est\u00e1gio pr\u00e9-alpha, adequado apenas para uso por desenvolvedores. O projeto foi inicialmente criado como um aplicativo para o sistema operacional SerenityOS, mas no ver\u00e3o do ano passado foi destacado como um projeto separado e recebeu um financiamento de 1 milh\u00e3o de d\u00f3lares. O navegador \u00e9 escrito em C++ (decidiu-se migrar para a linguagem Swift) e \u00e9 distribu\u00eddo sob a licen\u00e7a BSD. O projeto tamb\u00e9m desenvolve seu pr\u00f3prio motor LibWeb, o interpretador JavaScript LibJS e bibliotecas associadas.<br \/>\n<br \/>Fonte: <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 5.0.3 - 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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m\u00e1quina ao processar um c\u00f3digo JavaScript especialmente formatado.","canonical_url":"https:\/\/prohoster.info\/pt\/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":"pt_PT","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 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\u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e JavaScript-\u043a\u043e\u0434\u0430.","og:url":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","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":"2025-05-03T13:05:07+00:00","article:modified_time":"2025-05-03T13:05:07+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"123965","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-23 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