{"id":111112,"date":"2023-10-26T21:10:14","date_gmt":"2023-10-26T19:10:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/rezultaty-audita-tor-browser-i-komponentov-infrastruktury-tor"},"modified":"2023-10-26T21:10:14","modified_gmt":"2023-10-26T19:10:15","slug":"rezultaty-audita-tor-browser-i-komponentov-infrastruktury-tor","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/rezultaty-audita-tor-browser-i-komponentov-infrastruktury-tor","title":{"rendered":"Results of the Tor Browser audit and components of the Tor infrastructure","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Udviklerne af det anonyme netv\u00e6rk Tor har offentliggjort resultaterne af en revision af Tor Browser og de v\u00e6rkt\u00f8jer, der udvikles af projektet, s\u00e5som OONI Probe, rdsys, BridgeDB og Conjure, som bruges til at omg\u00e5 censur. Revisionen blev udf\u00f8rt af Cure53 fra november 2022 til april 2023.     <\/p>\n<p>Under kontrolen blev der identificeret 9 s\u00e5rbarheder, hvoraf to blev kategoriseret som kritiske, en blev tildelt en medium risikokategori og 6 blev vurderet som problemer med lav risiko. Derudover blev der fundet 10 problemer i kodebasen, klassificeret som ikke-sikkerhedsm\u00e6ssige mangler. Generelt blev Tor-projektets kode bed\u00f8mt som overensstemmende med sikkerhedsforhold.      <\/p>\n<p>Den f\u00f8rste kritiske s\u00e5rbarhed var til stede i backend-systemet rdsys, som sikrer levering af censurerede ressourcer til brugerne, s\u00e5som proxy-lister og downloadlinks. S\u00e5rbarheden skyldtes manglende autentificering ved anmodning til ressourceregistreringshandleren og gjorde det muligt for en angriber at registrere sin egen skadelige ressource til levering til brugerne. Udnyttelse svarede til at sende en HTTP-anmodning til rdsys-handleren.   <center><img decoding=\"async\" alt=\"Results of the Tor Browser audit and components of the Tor infrastructure\" src=\"\/wp-content\/uploads\/2023\/10\/59560b2962adcce743937eb500061be1.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Den anden kritiske s\u00e5rbarhed blev fundet i Tor Browser og skyldtes mangel p\u00e5 kontrollere af digitale signaturer ved modtagelse af listen over broknuder via rdsys og BridgeDB. Da listen indl\u00e6ses i browseren f\u00f8r tilslutning til Tor-anonymiseringsnetv\u00e6rket, gav manglen p\u00e5 kontrol med den kryptografiske digitale signatur en angriber mulighed for at \u00e6ndre indholdet af listen, for eksempel gennem interception af forbindelsen eller hacking  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3897\">server<\/a>, gennem hvilken listen spredes. I tilf\u00e6lde af en vellykket angreb kunne angriberen lede brugerne til at forbinde gennem sin egen kompromitterede broknude.        <\/p>\n<p>En s\u00e5rbarhed med medium risiko var til stede i rdsys-subsystemet i implementeringsscriptet for builds og tillod en angriber at h\u00e6ve sine privilegier fra brugeren nobody til brugeren rdsys, hvis vedkommende havde adgang til <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2930\">server<\/a> og muligheden for at skrive til mappen med midlertidige filer. Udnyttelse af s\u00e5rbarheden involverede udskiftning af den eksekverbare fil, der blev placeret i kataloget \/tmp. At f\u00e5 adgang til brugeren rdsys giver angriberen mulighed for at foretage \u00e6ndringer i de eksekverbare filer, der k\u00f8res via rdsys.    <\/p>\n<p>S\u00e5rbarheder af lav grad var prim\u00e6rt relateret til brugen af for\u00e6ldede afh\u00e6ngigheder, som indeholdt kendte s\u00e5rbarheder, eller muligheden for at for\u00e5rsage en tjenesteafbrydelse. Blandt de mindre s\u00e5rbarheder i Tor Browser bem\u00e6rkes muligheden for at omg\u00e5 forbuddet mod at k\u00f8re JavaScript ved at anvende det h\u00f8jeste beskyttelsesniveau, mangel p\u00e5 begr\u00e6nsninger for filoverf\u00f8rsler og potentiel l\u00e6kage af information via brugerens startside, som g\u00f8r det muligt at spore brugere mellem genstart.    <\/p>\n<p>Alle s\u00e5rbarheder er nu blevet rettet, blandt andet er der implementeret autentifikation for alle rdsys-handlere og tilf\u00f8jet kontrol af de lister, der uploades til Tor Browser, ved hj\u00e6lp af digitale signaturer.      <\/p>\n<p>Derudover kan det n\u00e6vnes, at Tor Browser 13.0.1 er blevet udgivet. Udgivelsen er synkroniseret med koden fra Firefox 115.4.0 ESR, som har rettet 19 s\u00e5rbarheder (13 anset for farlige). Rettelserne af s\u00e5rbarheder fra Firefox 119 er blevet overf\u00f8rt til Tor Browser 13.0.1 til Android.<br \/>\n<br \/>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59999\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438 Tor \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u0443\u0434\u0438\u0442\u0430 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Tor Browser \u0438 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0435\u0432 OONI Probe, rdsys, BridgeDB \u0438 Conjure, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0445 \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u0446\u0435\u043d\u0437\u0443\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. \u0410\u0443\u0434\u0438\u0442 \u043f\u0440\u043e\u0432\u043e\u0434\u0438\u043b\u0441\u044f \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Cure53 \u0441 \u043d\u043e\u044f\u0431\u0440\u044f 2022 \u0433\u043e\u0434\u0430 \u043f\u043e \u0430\u043f\u0440\u0435\u043b\u044c 2023 \u0433\u043e\u0434\u0430. \u0412 \u0445\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0431\u044b\u043b\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b 9 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0434\u0432\u0435 \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0442\u043d\u0435\u0441\u0435\u043d\u044b \u043a \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438 \u043e\u043f\u0430\u0441\u043d\u044b\u0445, \u043e\u0434\u043d\u043e\u0439 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0441\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":111113,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-111112","post","type-post","status-publish","format-standard","has-post-thumbnail","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=\"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0439 \u0441\u0435\u0442\u0438 Tor \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 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