{"id":101183,"date":"2021-09-03T10:22:53","date_gmt":"2021-09-03T08:22:53","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/opublikovany-rezultaty-audita-vpn-klienta-mozilla"},"modified":"2021-09-03T10:22:53","modified_gmt":"2021-09-03T08:22:53","slug":"opublikovany-rezultaty-audita-vpn-klienta-mozilla","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/opublikovany-rezultaty-audita-vpn-klienta-mozilla","title":{"rendered":"Byly zve\u0159ejn\u011bny v\u00fdsledky auditu VPN klienta Mozilla","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Spole\u010dnost Mozilla ozn\u00e1mila dokon\u010den\u00ed nez\u00e1visl\u00e9ho auditu klientsk\u00e9ho softwaru pro p\u0159ipojen\u00ed k slu\u017eb\u011b Mozilla VPN. B\u011bhem auditu byl analyzov\u00e1n samostatn\u00fd klientsk\u00fd program napsan\u00fd pomoc\u00ed knihovny Qt, dod\u00e1van\u00fd pro Linux, macOS, Windows, Android a iOS. Slu\u017eba Mozilla VPN je zaji\u0161\u0165ov\u00e1na v\u00edce ne\u017e 400 servery \u0161v\u00e9dsk\u00e9ho poskytovatele VPN Mullvad, um\u00edst\u011bn\u00fdmi ve v\u00edce ne\u017e 30 zem\u00edch. P\u0159ipojen\u00ed k VPN<\/a>-slu\u017eb\u011b se prov\u00e1d\u00ed pomoc\u00ed protokolu WireGuard. <\/p>\n

Auditu se v\u011bnovala spole\u010dnost Cure53, kter\u00e1 v minulosti prov\u00e1d\u011bla audity projekt\u016f NTPsec, SecureDrop, Cryptocat, F-Droid a Dovecot. Audity zahrnovaly kontrolu zdrojov\u00e9ho k\u00f3du a prov\u00e1d\u011bn\u00ed test\u016f za \u00fa\u010delem odhalen\u00ed mo\u017en\u00fdch zranitelnost\u00ed (ot\u00e1zky spojen\u00e9 s kryptografi\u00ed nebyly zkoum\u00e1ny). B\u011bhem kontroly bylo identifikov\u00e1no 16 bezpe\u010dnostn\u00edch probl\u00e9m\u016f, z nich\u017e 8 m\u011blo charakter doporu\u010den\u00ed, 5 bylo ozna\u010deno jako n\u00edzk\u00e9 riziko, dv\u011b jako st\u0159edn\u00ed a jedno jako vysok\u00e9. <\/p>\n

P\u0159itom pouze jeden probl\u00e9m se st\u0159edn\u00ed \u00farovn\u00ed rizika byl za\u0159azen mezi zranitelnosti, jeliko\u017e pouze ten byl vhodn\u00fd k exploitaci. Tento probl\u00e9m vedl k \u00faniku informac\u00ed o pou\u017e\u00edv\u00e1n\u00ed VPN v k\u00f3du pro ur\u010den\u00ed captive port\u00e1lu z d\u016fvodu odes\u00edl\u00e1n\u00ed ne\u0161ifrovan\u00fdch p\u0159\u00edm\u00fdch dotaz\u016f p\u0159es HTTP, kter\u00e9 byly zas\u00edl\u00e1ny mimo VPN tunel a odhalovaly hlavn\u00ed IP adresu u\u017eivatele, v p\u0159\u00edpad\u011b \u017ee \u00fato\u010dn\u00edk mohl kontrolovat transitn\u00ed provoz. Probl\u00e9m se \u0159e\u0161\u00ed vypnut\u00edm re\u017eimu ur\u010den\u00ed captive port\u00e1lu v nastaven\u00ed. <\/p>\n

Druhý problém st\u0159ední úrovn\u011b nebezpe\u010dnosti je spojen s absencí \u0159ádného \u010dišt\u011bní ne\u017eádoucích hodnot v \u010dísle portu, co\u017e umo\u017e\u0148uje uniknutí parametr\u016f autentizace OAuth prost\u0159ednictvím nahrazení \u010dísla portu \u0159et\u011bzcem ve formátu „1234@example.com“, co\u017e povede k nastavení tagu <img src="»http:\/\/127.0.0.1:1234@example.com\/?code=…»" alt="»»">, který se odkazuje na example.com místo 127.0.0.1. <\/p>\n

T\u0159et\u00ed probl\u00e9m, ozna\u010den\u00fd jako nebezpe\u010dn\u00fd, umo\u017e\u0148uje jak\u00e9koli m\u00edstn\u00ed aplikaci bez autentifikace p\u0159istupovat k VPN klientu p\u0159es WebSocket p\u0159ipojen\u00fd k localhost. Jako p\u0159\u00edklad bylo uk\u00e1z\u00e1no, jak p\u0159i aktivn\u00edm VPN klientu mohl jak\u00fdkoli web uspo\u0159\u00e1dat vytvo\u0159en\u00ed a odesl\u00e1n\u00ed screenshotu prost\u0159ednictv\u00edm generace ud\u00e1losti screen_capture. Tento probl\u00e9m nebyl za\u0159azen mezi zranitelnosti, proto\u017ee WebSocket byl pou\u017e\u00edv\u00e1n pouze ve vnit\u0159n\u00edch testovac\u00edch sestav\u00e1ch a pou\u017eit\u00ed tohoto komunika\u010dn\u00edho kan\u00e1lu bylo pl\u00e1nov\u00e1no v budoucnu pro organizaci interakce s prohl\u00ed\u017ee\u010dov\u00fdm dopl\u0148kem.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Mozilla \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u0438 \u043d\u0435\u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0433\u043e \u0430\u0443\u0434\u0438\u0442\u0430 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u043e\u0433\u043e \u041f\u041e \u0434\u043b\u044f \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a \u0441\u0435\u0440\u0432\u0438\u0441\u0443 Mozilla VPN. \u0412 \u0445\u043e\u0434\u0435 \u0430\u0443\u0434\u0438\u0442\u0430 \u0431\u044b\u043b \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d \u0430\u043d\u0430\u043b\u0438\u0437 \u043e\u0431\u043e\u0441\u043e\u0431\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f, \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u043d\u043e\u0433\u043e \u0441 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