{"id":31538,"date":"2019-10-31T21:41:45","date_gmt":"2019-10-31T18:41:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/dragonblood-vyyavleny-pervye-uyazvimosti-wi-fi-wpa3\/"},"modified":"2019-10-31T21:41:45","modified_gmt":"2019-10-31T18:41:45","slug":"dragonblood-vyyavleny-pervye-uyazvimosti-wi-fi-wpa3","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/dragonblood-vyyavleny-pervye-uyazvimosti-wi-fi-wpa3","title":{"rendered":"Dragonblood: byly odhaleny prvn\u00ed zranitelnosti Wi-Fi WPA3","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V \u0159\u00edjnu 2017 se neo\u010dek\u00e1van\u011b uk\u00e1zalo, \u017ee v protokolu Wi-Fi Protected Access II (WPA2) existuje z\u00e1va\u017en\u00e1 zranitelnost, kter\u00e1 umo\u017e\u0148uje odhalovat hesla u\u017eivatel\u016f a n\u00e1sledn\u011b odposlouch\u00e1vat v\u00fdm\u011bnu dat ob\u011bt\u00ed. Tato zranitelnost byla nazv\u00e1na KRACK (zkratka pro Key Reinstallation Attack) a objevili ji odborn\u00edci Mathy Vanhoef a Eyal Ronen. Po jej\u00edm zji\u0161t\u011bn\u00ed byla zranitelnost KRACK zabezpe\u010dena opraven\u00fdmi firmware pro za\u0159\u00edzen\u00ed, a protokol WPA3, kter\u00fd p\u0159i\u0161el v lo\u0148sk\u00e9m roce jako n\u00e1hrada za WPA2, m\u011bl zcela zapomenout na probl\u00e9my s bezpe\u010dnost\u00ed v s\u00edt\u00edch Wi-Fi. <\/p>\n

\"Dragonblood:<\/p>\n

Bohu\u017eel ti sam\u00ed odborn\u00edci objevili tak\u00e9 m\u00e9n\u011b nebezpe\u010dn\u00e9 zranitelnosti v protokolu WPA3. Proto op\u011bt mus\u00edme \u010dekat a doufat v nov\u00e9 firmware pro bezdr\u00e1tov\u00e9 p\u0159\u00edstupov\u00e9 body a za\u0159\u00edzen\u00ed, jinak budeme muset \u017e\u00edt s v\u011bdom\u00edm zranitelnosti dom\u00e1c\u00edch a ve\u0159ejn\u00fdch s\u00edt\u00ed Wi-Fi. Zranitelnosti nalezen\u00e9 v WPA3 dostaly obecn\u00fd n\u00e1zev Dragonblood.<\/p>\n

Ko\u0159eny probl\u00e9mu, stejn\u011b jako d\u0159\u00edve, spo\u010d\u00edvaj\u00ed v pr\u00e1ci mechanismu navazov\u00e1n\u00ed spojen\u00ed, nebo jak se naz\u00fdv\u00e1 ve standardu, \u201ehandshake\u201c. Tento mechanismus ve standardu WPA3 se naz\u00fdv\u00e1 Dragonfly. P\u0159ed odhalen\u00edm Dragonblood byl pova\u017eov\u00e1n za dob\u0159e chr\u00e1n\u011bn\u00fd. Celkem v bal\u00ed\u010dku Dragonblood bylo p\u011bt variant zranitelnost\u00ed: znep\u0159\u00edstupn\u011bn\u00ed slu\u017eby, dv\u011b zranitelnosti se sn\u00ed\u017een\u00edm \u00farovn\u011b ochrany s\u00edt\u011b (downgrade) a dv\u011b zranitelnosti s \u00fatokem pomoc\u00ed vedlej\u0161\u00edch kan\u00e1l\u016f (side-channel).<\/p>\n

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\n\"Dragonblood:<\/p>\n

Znep\u0159\u00edstupn\u011bn\u00ed slu\u017eby nevede k \u00faniku dat, ale m\u016f\u017ee b\u00fdt nep\u0159\u00edjemnou ud\u00e1lost\u00ed pro u\u017eivatele, kter\u00fd se st\u00e1le nem\u016f\u017ee p\u0159ipojit k p\u0159\u00edstupov\u00e9mu bodu. Ostatn\u00ed zranitelnosti umo\u017e\u0148uj\u00ed \u00fato\u010dn\u00edkovi obnovit hesla pro p\u0159ipojen\u00ed u\u017eivatele k p\u0159\u00edstupov\u00e9mu bodu a sledovat jak\u00e9koli d\u016fle\u017eit\u00e9 informace pro u\u017eivatele.<\/p>\n

\u00datoky se sn\u00ed\u017een\u00edm \u00farovn\u011b ochrany s\u00edt\u011b umo\u017e\u0148uj\u00ed donutit u\u017eivatele p\u0159ej\u00edt na star\u0161\u00ed verzi protokolu WPA2 nebo na slab\u0161\u00ed varianty \u0161ifrovac\u00edch algoritm\u016f WPA3 a pot\u00e9 pokra\u010dovat v prolomen\u00ed ji\u017e zn\u00e1m\u00fdmi metodami. \u00datok vyu\u017e\u00edvaj\u00edc\u00ed vedlej\u0161\u00ed kan\u00e1ly exploatuje vlastnosti algoritm\u016f WPA3 a jejich implementac\u00ed, co\u017e nakonec tak\u00e9 umo\u017e\u0148uje pou\u017e\u00edvat d\u0159\u00edve zn\u00e1m\u00e9 metody prolomen\u00ed hesel. Podrobnosti zde. N\u00e1stroj pro odhalov\u00e1n\u00ed zranitelnost\u00ed Dragonblood najdete na tomto odkazu.<\/p>\n

\"Dragonblood:<\/p>\n

Aliance Wi-Fi, kter\u00fd je odpov\u011bdn\u00fd za v\u00fdvoj standard\u016f Wi-Fi, byl informov\u00e1n o nalezen\u00fdch zranitelnostech. V\u00fdrobci za\u0159\u00edzen\u00ed \u00fadajn\u011b p\u0159ipravuj\u00ed upraven\u00e9 firmware, aby zakryli odhalen\u00e9 bezpe\u010dnostn\u00ed d\u00edry. Nen\u00ed t\u0159eba vym\u011b\u0148ovat ani vracet za\u0159\u00edzen\u00ed.<\/p>\n

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Zdroj: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043e\u043a\u0442\u044f\u0431\u0440\u0435 2017 \u0433\u043e\u0434\u0430 \u043d\u0435\u043e\u0436\u0438\u0434\u0430\u043d\u043d\u043e \u0432\u044b\u044f\u0441\u043d\u0438\u043b\u043e\u0441\u044c, \u0447\u0442\u043e \u0432 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 Wi-Fi Protected Access II (WPA2) \u0434\u043b\u044f \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0442\u0440\u0430\u0444\u0438\u043a\u0430 Wi-Fi \u0438\u043c\u0435\u0435\u0442\u0441\u044f \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u044b\u044f\u0432\u043b\u044f\u0442\u044c \u043f\u0430\u0440\u043e\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438 \u0437\u0430\u0442\u0435\u043c \u043f\u0440\u043e\u0441\u043b\u0443\u0448\u0438\u0432\u0430\u0442\u044c \u043e\u0431\u043c\u0435\u043d \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0436\u0435\u0440\u0442\u0432\u044b. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 KRACK (\u0441\u043e\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043e\u0442 Key Reinstallation Attack) \u0438 \u0431\u044b\u043b\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u0438\u0441\u0442\u0430\u043c\u0438 \u041c\u044d\u0442\u0438 \u0412\u0430\u043d\u0445\u043e\u0444\u043e\u043c (Mathy Vanhoef) \u0438 \u042d\u0439\u0430\u043b\u043e\u043c \u0420\u043e\u043d\u0435\u043d\u043e\u043c (Eyal Ronen). \u041f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":23463,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-31538","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Dragonblood: odhaleny prvn\u00ed zranitelnosti Wi-Fi WPA3 | ProHoster","description":"V \u0159\u00edjnu 2017 se ne\u010dekan\u011b uk\u00e1zalo, \u017ee v protokolu Wi-Fi Protected Access II (WPA2) pro \u0161ifrov\u00e1n\u00ed Wi-Fi provozu existuje v\u00e1\u017en\u00e1 zranitelnost, kter\u00e1 umo\u017e\u0148uje odhalit u\u017eivatelsk\u00e1 hesla a 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