{"id":102530,"date":"2021-12-09T15:36:49","date_gmt":"2021-12-09T13:36:50","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-tor-browser-11-0-2-rasshirenie-blokirovki-sajtov-tor-vozmozhnye-ataki-na-tor"},"modified":"2021-12-09T15:36:49","modified_gmt":"2021-12-09T13:36:50","slug":"vypusk-tor-browser-11-0-2-rasshirenie-blokirovki-sajtov-tor-vozmozhnye-ataki-na-tor","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-tor-browser-11-0-2-rasshirenie-blokirovki-sajtov-tor-vozmozhnye-ataki-na-tor","title":{"rendered":"Verze Tor Browser 11.0.2. Roz\u0161\u00ed\u0159en\u00ed pro blokov\u00e1n\u00ed webov\u00fdch str\u00e1nek Tor. Mo\u017en\u00e9 \u00fatoky na Tor","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bylo p\u0159edstaveno vyd\u00e1n\u00ed specializovan\u00e9ho prohl\u00ed\u017ee\u010de Tor Browser 11.0.2, kter\u00fd se zam\u011b\u0159uje na ochranu anonymity, bezpe\u010dnosti a soukrom\u00ed. P\u0159i pou\u017e\u00edv\u00e1n\u00ed Tor Browseru je ve\u0161ker\u00fd provoz p\u0159esm\u011brov\u00e1n pouze p\u0159es s\u00ed\u0165 Tor, a p\u0159\u00edstup p\u0159\u00edmo p\u0159es b\u011b\u017en\u00e9 s\u00ed\u0165ov\u00e9 p\u0159ipojen\u00ed aktu\u00e1ln\u00edho syst\u00e9mu nen\u00ed mo\u017en\u00fd, co\u017e zabra\u0148uje sledov\u00e1n\u00ed skute\u010dn\u00e9 IP adresy u\u017eivatele (v p\u0159\u00edpad\u011b \u00fatoku na prohl\u00ed\u017ee\u010d mohou \u00fato\u010dn\u00edci z\u00edskat p\u0159\u00edstup k syst\u00e9mov\u00fdm s\u00ed\u0165ov\u00fdm parametr\u016fm, a proto je pro \u00faplnou blokaci mo\u017en\u00fdch \u00fanik\u016f vhodn\u00e9 pou\u017e\u00edvat takov\u00e9 produkty jako Whonix). Sestavy Tor Browseru jsou p\u0159ipraveny pro Linux, Windows a macOS.     <\/p>\n<p>Pro zaji\u0161t\u011bn\u00ed dodate\u010dn\u00e9 ochrany je v Tor Browseru zahrnuta dopln\u011bk HTTPS Everywhere, kter\u00fd umo\u017e\u0148uje \u0161ifrov\u00e1n\u00ed provozu na v\u0161ech str\u00e1nk\u00e1ch, kde je to mo\u017en\u00e9. Pro sn\u00ed\u017een\u00ed hrozeb z \u00fatok\u016f vyu\u017e\u00edvaj\u00edc\u00edch JavaScript a blokov\u00e1n\u00ed plugin\u016f je sou\u010d\u00e1st\u00ed dopln\u011bk NoScript. Pro boj s blokov\u00e1n\u00edm a inspekc\u00ed provozu se pou\u017e\u00edvaj\u00ed alternativn\u00ed transporty. K ochran\u011b proti specifick\u00fdm charakteristik\u00e1m pro konkr\u00e9tn\u00edho n\u00e1v\u0161t\u011bvn\u00edka jsou deaktivov\u00e1ny nebo omezeny API WebGL, WebGL2, WebAudio, Social, SpeechSynthesis, Touch, AudioContext, HTMLMediaElement, Mediastream, Canvas, SharedWorker, Permissions, MediaDevices.enumerateDevices a screen.orientation, a tak\u00e9 jsou deaktivov\u00e1ny n\u00e1stroje pro odes\u00edl\u00e1n\u00ed telemetrie, Pocket, Reader View, HTTP Alternative-Services, MozTCPSocket, 'link rel=preconnect', modifikovan\u00e1 libmdns.      <\/p>\n<p>V nov\u00e9 verzi do\u0161lo k synchronizaci s k\u00f3dovou z\u00e1kladnou vyd\u00e1n\u00ed Firefox 91.4.0, ve kter\u00e9m bylo odstran\u011bno 15 zranitelnost\u00ed, z nich\u017e 10 je ozna\u010deno jako nebezpe\u010dn\u00fdch. 7 zranitelnost\u00ed je zp\u016fsobeno probl\u00e9my s pam\u011bt\u00ed, jako jsou p\u0159ete\u010den\u00ed buffer\u016f a p\u0159\u00edstup k ji\u017e uvoln\u011bn\u00fdm oblastem pam\u011bti, a potenci\u00e1ln\u011b mohou v\u00e9st k proveden\u00ed k\u00f3du \u00fato\u010dn\u00edka p\u0159i otev\u0159en\u00ed speci\u00e1ln\u011b vytvo\u0159en\u00fdch str\u00e1nek. Z build\u016f pro platformu Linux byly vylou\u010deny n\u011bkter\u00e9 ttf-p\u00edsma, jejich\u017e pou\u017eit\u00ed vedlo k poru\u0161en\u00ed vykreslov\u00e1n\u00ed textu v u\u017eivatelsk\u00fdch prvc\u00edch ve Fedora Linux. Byla deaktivov\u00e1na mo\u017enost 'network.proxy.allow_bypass', kter\u00e1 \u0159\u00eddila aktivitu ochrany p\u0159ed nespr\u00e1vn\u00fdm pou\u017eit\u00edm API Proxy v dopl\u0148c\u00edch. Pro transport obfs4 byl ve v\u00fdchoz\u00edm nastaven\u00ed pou\u017e\u00edt nov\u00fd gateway 'deusexmachina'.    <\/p>\n<p>Mezit\u00edm pokra\u010duje p\u0159\u00edb\u011bh o zablokov\u00e1n\u00ed Tor v RF. Roskomnadzor zm\u011bnil v registru zak\u00e1zan\u00fdch str\u00e1nek masku blokovan\u00fdch <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/domain\/\"   title=\"dom\u00e9n.\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3170\">dom\u00e9n.<\/a> z 'www.torproject.org' na '*.torproject.org' a roz\u0161\u00ed\u0159il seznam IP adres, kter\u00e9 podl\u00e9haj\u00ed blokaci. V d\u016fsledku t\u00e9to zm\u011bny byly blokov\u00e1ny v\u011bt\u0161ina subdom\u00e9n projektu Tor, v\u010detn\u011b blog.torproject.org, gettor.torproject.org a support.torproject.org. F\u00f3rum forum.torproject.net, um\u00edst\u011bn\u00e9 v infrastruktu\u0159e Discourse, z\u016fst\u00e1v\u00e1 dostupn\u00e9. \u010c\u00e1ste\u010dn\u011b jsou dostupn\u00e9 gitlab.torproject.org a lists.torproject.org, k nim\u017e zpo\u010d\u00e1tku nebyl p\u0159\u00edstup, ale pozd\u011bji byl obnoven, pravd\u011bpodobn\u011b po zm\u011bn\u011b IP adres (gitlab nyn\u00ed sm\u011b\u0159uje na host gitlab-02.torproject.org).     <\/p>\n<p>P\u0159itom p\u0159estaly b\u00fdt zaznamen\u00e1v\u00e1ny blokace bran a uzl\u016f s\u00edt\u011b Tor, stejn\u011b jako hostitele ajax.aspnetcdn.com (CDN Microsoft), kter\u00fd je pou\u017e\u00edv\u00e1n v transportu meek-asure. Soud\u011b podle v\u0161eho experimentech s blokov\u00e1n\u00edm uzl\u016f s\u00edt\u011b Tor po blokaci webu Tor skon\u010dily. Slo\u017eit\u00e1 situace vznik\u00e1 s zrcadlem tor.eff.org, kter\u00e9 nad\u00e1le funguje. To proto, \u017ee zrcadlo tor.eff.org je v\u00e1z\u00e1no na stejn\u00e9 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/lir\/ipv4\/\"   title=\"IP adresu\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"607\">IP adresu<\/a>, kter\u00e9 se pou\u017e\u00edv\u00e1 pro dom\u00e9nu eff.org organizace EFF (Electronic Frontier Foundation), tak\u017ee blokace tor.eff.org povede k \u010d\u00e1ste\u010dn\u00e9 blokaci webu zn\u00e1m\u00e9 lidskopr\u00e1vn\u00ed organizace.    <center><img decoding=\"async\" alt=\"Verze Tor Browser 11.0.2. Roz\u0161\u00ed\u0159en\u00ed pro blokov\u00e1n\u00ed webov\u00fdch str\u00e1nek Tor. Mo\u017en\u00e9 \u00fatoky na Tor\" src=\"\/wp-content\/uploads\/2021\/12\/bb0a59ed78d93a0e4a25a8c6d6811eac.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Krom\u011b toho lze poznamenat vyd\u00e1n\u00ed nov\u00e9 zpr\u00e1vy o mo\u017en\u00fdch pokusech o proveden\u00ed \u00fatok\u016f na deanonimizaci u\u017eivatel\u016f Tor, kter\u00e9 jsou spojov\u00e1ny se skupinou KAX17, vy\u010dle\u0148ovanou podle specifick\u00e9ho fiktivn\u00edho kontaktn\u00edho emailu v parametrech uzl\u016f. B\u011bhem z\u00e1\u0159\u00ed a \u0159\u00edjna projekt Tor zablokoval 570 potenci\u00e1ln\u011b \u0161kodliv\u00fdch uzl\u016f. V obdob\u00ed maxim\u00e1ln\u00edho zat\u00ed\u017een\u00ed se skupin\u011b KAX17 poda\u0159ilo dostat po\u010det kontrolovan\u00fdch uzl\u016f v s\u00edti Tor na 900, um\u00edst\u011bn\u00fdch u 50 r\u016fzn\u00fdch poskytovatel\u016f, co\u017e odpov\u00edd\u00e1 p\u0159ibli\u017en\u011b 14 % z celkov\u00e9ho po\u010dtu relay\u016f (pro srovn\u00e1n\u00ed v roce 2014 se \u00fato\u010dn\u00edk\u016fm poda\u0159ilo z\u00edskat kontrolu nad t\u00e9m\u011b\u0159 polovinou relay\u016f Tor a v roce 2020 nad 23,95 % v\u00fdstupn\u00edch uzl\u016f).    <center><img decoding=\"async\" alt=\"Verze Tor Browser 11.0.2. Roz\u0161\u00ed\u0159en\u00ed pro blokov\u00e1n\u00ed webov\u00fdch str\u00e1nek Tor. Mo\u017en\u00e9 \u00fatoky na Tor\" src=\"\/wp-content\/uploads\/2021\/12\/6c582baf8cc261844a217211037a2a1a.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/center>    <\/p>\n<p>Um\u00edst\u011bn\u00ed velk\u00e9ho po\u010dtu uzl\u016f pod kontrolou jednoho oper\u00e1tora umo\u017e\u0148uje deanonimizaci u\u017eivatel\u016f pomoc\u00ed Sybil \u00fatoku, kter\u00fd m\u016f\u017ee b\u00fdt proveden, pokud maj\u00ed \u00fato\u010dn\u00edci kontrolu nad prvn\u00edm a posledn\u00edm uzlem v anonymiza\u010dn\u00edm \u0159et\u011bzci. Prvn\u00ed uzel v s\u00edti Tor zn\u00e1 IP adresu u\u017eivatele, zat\u00edmco posledn\u00ed zn\u00e1 IP adresu po\u017eadovan\u00e9ho zdroje, co\u017e umo\u017e\u0148uje deanonimizaci po\u017eadavku p\u0159id\u00e1n\u00edm ur\u010dit\u00e9 skryt\u00e9 zna\u010dky do hlavi\u010dek paket\u016f na stran\u011b vstupn\u00edho uzlu, kter\u00e1 z\u016fst\u00e1v\u00e1 nezm\u011bn\u011bna po celou dobu anonymiza\u010dn\u00edho \u0159et\u011bzce, a anal\u00fdzou t\u00e9to zna\u010dky na stran\u011b v\u00fdstupn\u00edho uzlu. V p\u0159\u00edpad\u011b, \u017ee maj\u00ed \u00fato\u010dn\u00edci kontrolu nad v\u00fdstupn\u00edmi uzly, mohou tak\u00e9 prov\u00e1d\u011bt zm\u011bny v neza\u0161ifrovan\u00e9m provozu, nap\u0159\u00edklad odstra\u0148ovat p\u0159esm\u011brov\u00e1n\u00ed na HTTPS verze web\u016f a zachycovat neza\u0161ifrovan\u00fd obsah.     <\/p>\n<p>Podle \u00fadaj\u016f z\u00e1stupc\u016f s\u00edt\u011b Tor v\u011bt\u0161ina ze vzd\u00e1len\u00fdch uzl\u016f, kter\u00e9 byly na podzim odstran\u011bny, byla pou\u017e\u00edv\u00e1na pouze jako mezilehl\u00e9 uzly, kter\u00e9 nebyly vyu\u017e\u00edv\u00e1ny k zpracov\u00e1n\u00ed p\u0159\u00edchoz\u00edch a odchoz\u00edch po\u017eadavk\u016f. N\u011bkte\u0159\u00ed v\u00fdzkumn\u00edci upozor\u0148uj\u00ed, \u017ee uzly pat\u0159ily do v\u0161ech kategori\u00ed a pravd\u011bpodobnost, \u017ee se u\u017eivatel dostane na vstupn\u00ed uzel kontrolovan\u00fd skupinou KAX17, byla 16 %, zat\u00edmco na v\u00fdstupn\u00ed uzel \u2014 5 %. I kdy\u017e tomu tak je, celkov\u00e1 pravd\u011bpodobnost, \u017ee se u\u017eivatel dostane sou\u010dasn\u011b na vstupn\u00ed i v\u00fdstupn\u00ed uzly skupiny z 900 kontrolovan\u00fdch uzl\u016f KAX17, je odhadov\u00e1na na 0,8 %. P\u0159\u00edm\u00e9 d\u016fkazy o pou\u017eit\u00ed uzl\u016f KAX17 k prov\u00e1d\u011bn\u00ed \u00fatok\u016f chyb\u00ed, ale potenci\u00e1ln\u011b podobn\u00e9 \u00fatoky nejsou vylou\u010deny.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56312\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Tor Browser 11.0.2, \u0441\u043e\u0441\u0440\u0435\u0434\u043e\u0442\u043e\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u0438 \u0430\u043d\u043e\u043d\u0438\u043c\u043d\u043e\u0441\u0442\u0438, \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438 \u043f\u0440\u0438\u0432\u0430\u0442\u043d\u043e\u0441\u0442\u0438. \u041f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 Tor Browser \u0432\u0435\u0441\u044c \u0442\u0440\u0430\u0444\u0438\u043a \u043f\u0435\u0440\u0435\u043d\u0430\u043f\u0440\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0435\u0440\u0435\u0437 \u0441\u0435\u0442\u044c Tor, \u0430 \u043e\u0431\u0440\u0430\u0442\u0438\u0442\u044c\u0441\u044f \u043d\u0430\u043f\u0440\u044f\u043c\u0443\u044e \u0447\u0435\u0440\u0435\u0437 \u0448\u0442\u0430\u0442\u043d\u043e\u0435 \u0441\u0435\u0442\u0435\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u0442\u0435\u043a\u0443\u0449\u0435\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u0447\u0442\u043e \u043d\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0442\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0439 IP-\u0430\u0434\u0440\u0435\u0441 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f (\u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u0432\u0437\u043b\u043e\u043c\u0430 \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430, \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0435 \u043c\u043e\u0433\u0443\u0442 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c \u0441\u0435\u0442\u0438, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":102531,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102530","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 - 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