{"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\/cs\/blog\/news\/uyazvimost-v-libjs-pozvolyayushhaya-vypolnit-kod-pri-otkrytii-straniczy-v-brauzere-ladybird","title":{"rendered":"Zranitelnost v LibJS, kter\u00e1 umo\u017e\u0148uje prov\u00e9st k\u00f3d p\u0159i otev\u0159en\u00ed str\u00e1nky v prohl\u00ed\u017ee\u010di Ladybird","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V JavaScriptov\u00e9m enginu LibJS, kter\u00fd se pou\u017e\u00edv\u00e1 v webov\u00e9m prohl\u00ed\u017ee\u010di Ladybird, byla zji\u0161t\u011bna zranitelnost (CVE-2025-47154), kter\u00e1 umo\u017e\u0148uje vykon\u00e1n\u00ed vlastn\u00edho k\u00f3du v syst\u00e9mu p\u0159i zpracov\u00e1n\u00ed speci\u00e1ln\u011b upraven\u00e9ho JavaScriptov\u00e9ho k\u00f3du. Zranitelnost je zp\u016fsobena uvoln\u011bn\u00edm pam\u011bti na vektoru m_argument_values_buffer, na kter\u00fd z\u016fstal ukazatel ve struktu\u0159e arguments_list, co\u017e vedlo k p\u0159\u00edstupu do ji\u017e uvoln\u011bn\u00e9 oblasti pam\u011bti. K dispozici je funk\u010dn\u00ed prototyp exploit.    <\/p>\n<p>V\u00fdzkumn\u00edk, kter\u00fd identifikoval probl\u00e9m, provedl fuzzingov\u00e9 testov\u00e1n\u00ed LibJS, b\u011bhem kter\u00e9ho do\u0161lo k 10 havarijn\u00edm ukon\u010den\u00edm. Anal\u00fdza jednoho z t\u011bchto selh\u00e1n\u00ed uk\u00e1zala, \u017ee probl\u00e9m m\u016f\u017ee b\u00fdt zneu\u017eit p\u0159i zpracov\u00e1n\u00ed JavaScriptov\u00e9ho k\u00f3du. Zranitelnost umo\u017e\u0148ovala \u010d\u00edst a zapisovat do libovoln\u00fdch oblast\u00ed pam\u011bti procesu. Vykon\u00e1n\u00ed k\u00f3du bylo v exploitaci zaji\u0161t\u011bno pomoc\u00ed \u00fapravy n\u00e1vratov\u00e9ho ukazatele z funkce vykreslov\u00e1n\u00ed. Pomoc\u00ed orientovan\u00e9ho n\u00e1vratov\u00e9ho programov\u00e1n\u00ed (ROP \u2013 Return-Oriented Programming, exploit se tvo\u0159\u00ed z ji\u017e existuj\u00edc\u00edch blok\u016f strojov\u00fdch instrukc\u00ed kon\u010d\u00edc\u00edch instrukc\u00ed pro n\u00e1vrat \u0159\u00edzen\u00ed) byla sestavena \u0159et\u011bzov\u00e1 reakce pro proveden\u00ed syst\u00e9mov\u00e9ho vol\u00e1n\u00ed execve pro spu\u0161t\u011bn\u00ed extern\u00ed aplikace.        <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>Prohl\u00ed\u017ee\u010d Ladybird vyv\u00edj\u00ed Andreas Kling, kter\u00fd kdysi pracoval ve spole\u010dnosti Nokia a zab\u00fdval se v\u00fdvojem KHTML, a pot\u00e9 v Apple byl jedn\u00edm z v\u00fdvoj\u00e1\u0159\u016f Safari. V sou\u010dasn\u00e9 f\u00e1zi v\u00fdvoje je Ladybird v p\u0159edalfa verzi, vhodn\u00e9 pouze pro pou\u017eit\u00ed v\u00fdvoj\u00e1\u0159i. P\u016fvodn\u011b byl projekt vytvo\u0159en jako aplikace pro opera\u010dn\u00ed syst\u00e9m SerenityOS, ale v l\u00e9t\u011b lo\u0148sk\u00e9ho roku byl vy\u010dlen\u011bn jako samostatn\u00fd projekt a obdr\u017eel dar ve v\u00fd\u0161i 1 milionu dolar\u016f. Prohl\u00ed\u017ee\u010d je naps\u00e1n v jazyce C++ (bylo rozhodnuto p\u0159ej\u00edt na jazyk Swift) a je distribuov\u00e1n pod licenc\u00ed BSD. Projektem jsou vyv\u00edjeny vlastn\u00ed engine LibWeb, JavaScriptov\u00fd interpret LibJS a souvisej\u00edc\u00ed knihovny.<br \/>\n<br \/>Zdroj: <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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zji\u0161t\u011bna zranitelnost (CVE-2025-47154), kter\u00e1 umo\u017e\u0148uje vykon\u00e1n\u00ed vlastn\u00edho k\u00f3du v syst\u00e9mu p\u0159i zpracov\u00e1n\u00ed speci\u00e1ln\u011b upraven\u00e9ho JavaScriptov\u00e9ho k\u00f3du.","canonical_url":"https:\/\/prohoster.info\/cs\/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":"cs_CZ","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 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u044b \u0432 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0435 Ladybird | ProHoster","og:description":"\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 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