{"id":36788,"date":"2019-10-31T22:13:49","date_gmt":"2019-10-31T19:13:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd\/"},"modified":"2019-10-31T22:13:49","modified_gmt":"2019-10-31T19:13:49","slug":"novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd","title":{"rendered":"Nove ranjivosti u tehnologiji za\u0161tite be\u017ei\u010dnih mre\u017ea WPA3 i u EAP-pwd","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Mathy Vanhoef i Eyal RonenEyal Ronen<\/a><\/noindex>) otkrile su<\/a><\/noindex> novi napad metodom (CVE-2019-13377) na be\u017ei\u010dne mre\u017ee koje koriste WPA3, koji omogu\u0107uje dobivanje informacija o karakteristikama lozinke, koje se mogu koristiti za napad u offline na\u010dinu rada. Problem se pojavljuje u trenutnoj verziji Hostapd<\/a><\/noindex>.<\/p>\n

Podsjetimo, da su u travnju isti autori otkrili<\/a><\/noindex> \u0161est ranjivosti u WPA3, na koje je Wi-Fi Alliance, organizacija koja razvija standarde za be\u017ei\u010dne mre\u017ee, unijela promjene u preporuke za osiguranje sigurnih implementacija WPA3, u kojima je propisano kori\u0161tenje za\u0161ti\u0107enih elipti\u010dnih krivulja Brainpool<\/a><\/noindex>, umjesto ranije dopu\u0161tenih elipti\u010dnih krivulja P-521 i P-256. <\/p>\n

Ipak, analiza je pokazala da kori\u0161tenje Brainpool dovodi do stvaranja nove klase curenja podataka putem neautoriziranih kanala u algoritmu za dogovor o povezivanju koji se koristi u WPA3 Dragonfly<\/a><\/noindex>, koji omogu\u0107uje<\/a><\/noindex> za\u0161titu od napada na lozinke u offline na\u010dinu rada. Otkriveni problem pokazuje da je izrada implementacija Dragonfly i WPA3 bez curenja podataka putem neautoriziranih kanala izuzetno slo\u017een zadatak, a tako\u0111er isti\u010de neu\u010dinkovitost modela razvoja standarda iza zatvorenih vrata, bez provo\u0111enja javne rasprave o predlo\u017eenim metodama i revizije od strane zajednice.<\/p>\n

Kori\u0161tenjem elipti\u010dne krivulje Brainpool pri kodiranju lozinke algoritmom Dragonfly izvode se nekoliko preliminarnih iteracija s lozinkom, povezanih s brzim ra\u010dunanjem kratkog ha\u0161a prije nego \u0161to se primijeni elipti\u010dna krivulja. Prije pronala\u017eenja kratkog ha\u0161a, izvr\u0161ene operacije direktno ovise o lozinci i MAC adresi klijenta. Vrijeme izvr\u0161enja (koje korelira s brojem iteracija) i ka\u0161njenja izme\u0111u operacija tijekom preliminarnih iteracija mogu se mjeriti i koristiti za odre\u0111ivanje karakteristika lozinke, koje se mogu iskoristiti u offlineu za potvr\u0111ivanje to\u010dnosti izbora dijelova lozinke tijekom napada. Za izvo\u0111enje napada potrebno je imati pristup sustavu korisnika koji se povezuje na be\u017ei\u010dnu mre\u017eu. <\/p>\n

Osim toga, istra\u017eiva\u010di su otkrili drugu ranjivost (CVE-2019-13456) povezanu s curenjem informacija u implementaciji protokola EAP-pwd<\/a><\/noindex>, koji koristi Dragonfly algoritam. Problem je specifi\u010dan za RADIUS poslu\u017eitelj FreeRADIUS i na temelju curenja informacija putem vanjskih kanala, kao i prva ranjivost, omogu\u0107ava zna\u010dajno pojednostavljenje pronalaska lozinke. <\/p>\n

U kombinaciji s pobolj\u0161anom metodom filtriranja \u0161uma u procesu mjerenja latencija za odre\u0111ivanje broja iteracija, dovoljna su 75 mjerenja za jednu MAC adresu. Prilikom kori\u0161tenja GPU, tro\u0161kovi resursa za pronala\u017eenje jedne lozinke iz rje\u010dnika procjenjuju se na 1 USD. Metode za pobolj\u0161anje sigurnosti protokola koje omogu\u0107uju blokiranje otkrivenih problema ve\u0107 su unesene u nacrte budu\u0107ih Wi-Fi standarda (WPA 3.1<\/a><\/noindex>) i EAP-pwd<\/a><\/noindex>. Na\u017ealost, bez kr\u0161enja unazadne kompatibilnosti u trenutnim verzijama protokola, ne\u0107e biti mogu\u0107e ukloniti curenja putem vanjskih kanala.<\/p>\n

<\/a><\/noindex><\/p>\n

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

\u041c\u044d\u0442\u0438 \u0412\u0430\u043d\u0445\u043e\u0444\u043e\u043c (Mathy Vanhoef) \u0438 \u042d\u044f\u043b\u044c \u0420\u043e\u043d\u0435\u043d (Eyal Ronen) \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 (CVE-2019-13377) \u043d\u0430 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0435 \u0441\u0435\u0442\u0438, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0435 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044e \u0437\u0430\u0449\u0438\u0442\u044b WPA3, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0430\u0445 \u043f\u0430\u0440\u043e\u043b\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0435\u0433\u043e \u043f\u043e\u0434\u0431\u043e\u0440\u0430 \u0432 offline-\u0440\u0435\u0436\u0438\u043c\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 Hostapd. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0432 \u0430\u043f\u0440\u0435\u043b\u0435 \u0442\u0435\u043c\u0438 \u0436\u0435 \u0430\u0432\u0442\u043e\u0440\u0430\u043c\u0438 \u0431\u044b\u043b\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 WPA3, […]<\/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-36788","post","type-post","status-publish","format-standard","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\udd47Nove ranjivosti u za\u0161titi be\u017ei\u010dnih mre\u017ea WPA3 i u EAP-pwd | ProHoster","description":"Mathy Vanhoef i Eyal Ronen su otkrili.","canonical_url":"https:\/\/prohoster.info\/hr\/blog\/news\/novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hr_HR","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\u041d\u043e\u0432\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u0437\u0430\u0449\u0438\u0442\u044b \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439 WPA3 \u0438 \u0432 EAP-pwd | ProHoster","og:description":"\u041c\u044d\u0442\u0438 \u0412\u0430\u043d\u0445\u043e\u0444\u043e\u043c (Mathy Vanhoef) \u0438 \u042d\u044f\u043b\u044c \u0420\u043e\u043d\u0435\u043d (Eyal Ronen) \u0432\u044b\u044f\u0432\u0438\u043b\u0438.","og:url":"https:\/\/prohoster.info\/hr\/blog\/news\/novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T19:13:49+00:00","article:modified_time":"2019-10-31T19:13:49+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"36788","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-22 04:50:19","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 01:38:25","updated":"2026-01-22 04:50:19","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/posts\/36788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/comments?post=36788"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/posts\/36788\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/media?parent=36788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/categories?post=36788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hr\/wp-json\/wp\/v2\/tags?post=36788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}