{"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\/hu\/blog\/news\/novye-uyazvimosti-v-tehnologii-zashhity-besprovodnyh-setej-wpa3-i-v-eap-pwd","title":{"rendered":"New vulnerabilities in the WPA3 wireless security technology and in EAP-pwd","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Mathy Vanhoef \u00e9s Eyal RonenEyal Ronen<\/a><\/noindex>) felfedeztek<\/a><\/noindex> \u00faj t\u00e1mad\u00e1si m\u00f3dszer (CVE-2019-13377) vezet\u00e9k n\u00e9lk\u00fcli h\u00e1l\u00f3zatok ellen, amelyek a WPA3 v\u00e9delmi technol\u00f3gi\u00e1t haszn\u00e1lj\u00e1k, \u00e9s lehet\u0151v\u00e9 teszi jelsz\u00f3karakterisztik\u00e1k megszerz\u00e9s\u00e9t, amelyeket offline jelsz\u00f3keres\u00e9shez lehet felhaszn\u00e1lni. A probl\u00e9ma megjelenik a legfrissebb verzi\u00f3ban Hostapd<\/a><\/noindex>.<\/p>\n

Eml\u00e9keztet\u0151\u00fcl, \u00e1prilisban ugyanezek a szerz\u0151k kimutattak<\/a><\/noindex> hat s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel a WPA3-ban, amelynek ellen\u00e1ll\u00e1s\u00e1ra a Wi-Fi Sz\u00f6vets\u00e9g, amely a vezet\u00e9k n\u00e9lk\u00fcli h\u00e1l\u00f3zatok szabv\u00e1nyait fejleszti, m\u00f3dos\u00edtotta a WPA3 biztons\u00e1gos megval\u00f3s\u00edt\u00e1s\u00e1ra vonatkoz\u00f3 aj\u00e1nl\u00e1sokat, amelyek el\u0151\u00edrj\u00e1k, hogy v\u00e9dett elliptikus g\u00f6rb\u00e9ket Brainpool<\/a><\/noindex>, a kor\u00e1bban megengedett P-521 \u00e9s P-256 elliptikus g\u00f6rb\u00e9k helyett haszn\u00e1ljanak. <\/p>\n

Ennek ellen\u00e9re az elemz\u00e9s azt mutatta, hogy a Brainpool haszn\u00e1lata \u00faj oszt\u00e1ly\u00fa kisziv\u00e1rg\u00e1sokat okoz a WPA3 \u00e1ltal alkalmazott kapcsolatmeghat\u00e1roz\u00e1si algoritmusban. Dragonfly<\/a><\/noindex>, amely<\/a><\/noindex> v\u00e9delmet ny\u00fajt az offline jelsz\u00f3keres\u00e9s ellen. A felfedezett probl\u00e9ma azt mutatja, hogy a Dragonfly \u00e9s a WPA3 olyan megval\u00f3s\u00edt\u00e1s\u00e1nak l\u00e9trehoz\u00e1sa, amely mentes a k\u00fclvil\u00e1gi adatkisippant\u00e1sokt\u00f3l, rendk\u00edv\u00fcl neh\u00e9z feladat, \u00e9s megmutatja a z\u00e1rt ajt\u00f3k m\u00f6g\u00f6tti szabv\u00e1nyfejleszt\u00e9s modellszer\u0171s\u00e9g\u00e9t, amelyet nyilv\u00e1nos vita \u00e9s a k\u00f6z\u00f6ss\u00e9g \u00e1ltali audit n\u00e9lk\u00fcl folytatnak.<\/p>\n

A Brainpool elliptikus g\u00f6rb\u00e9j\u00e9nek haszn\u00e1lat\u00e1val a Dragonfly algoritmus a jelsz\u00f3 k\u00f3dol\u00e1sakor t\u00f6bb el\u0151zetes iter\u00e1ci\u00f3t v\u00e9gez a jelsz\u00f3val, amelyek gyors r\u00f6vid hash sz\u00e1m\u00edt\u00e1ssal kapcsolatosak, miel\u0151tt alkalmaznia kellene az elliptikus g\u00f6rb\u00e9t. A r\u00f6vid hash megtal\u00e1l\u00e1sa el\u0151tt v\u00e9gzett m\u0171veletek k\u00f6zvetlen\u00fcl a jelsz\u00f3t\u00f3l \u00e9s a kliens MAC-c\u00edm\u00e9t\u0151l f\u00fcggenek. A v\u00e9grehajt\u00e1si id\u0151 (amely korrel\u00e1l az iter\u00e1ci\u00f3k sz\u00e1m\u00e1val) \u00e9s a m\u0171veletek k\u00f6z\u00f6tti k\u00e9sleltet\u00e9sek az el\u0151zetes iter\u00e1ci\u00f3k v\u00e9grehajt\u00e1sa sor\u00e1n m\u00e9rhet\u0151k \u00e9s felhaszn\u00e1lhat\u00f3k a jelsz\u00f3 karakterisztik\u00e1inak meghat\u00e1roz\u00e1s\u00e1ra, amelyeket offline lehet haszn\u00e1lni a jelsz\u00f3 r\u00e9szeinek helyess\u00e9g\u00e9nek pontos\u00edt\u00e1sa \u00e9rdek\u00e9ben a keres\u00e9s sor\u00e1n. A t\u00e1mad\u00e1shoz felhaszn\u00e1l\u00f3i rendszerhez val\u00f3 hozz\u00e1f\u00e9r\u00e9s sz\u00fcks\u00e9ges, amely csatlakozik a vezet\u00e9k n\u00e9lk\u00fcli h\u00e1l\u00f3zathoz. <\/p>\n

Tov\u00e1bb\u00e1 a kutat\u00f3k egy m\u00e1sodik s\u00e9r\u00fcl\u00e9kenys\u00e9get (CVE-2019-13456) is felfedeztek, amely az inform\u00e1ci\u00f3k kisziv\u00e1rg\u00e1s\u00e1val kapcsolatos a protokoll megval\u00f3s\u00edt\u00e1s\u00e1ban. EAP-pwd<\/a><\/noindex>, amely a Dragonfly algoritmust haszn\u00e1lja. A probl\u00e9ma a FreeRADIUS RADIUS-szerverre jellemz\u0151, \u00e9s a harmadik f\u00e9l csatorn\u00e1kon t\u00f6rt\u00e9n\u0151 adatsziv\u00e1rg\u00e1s alapj\u00e1n, valamint az els\u0151 sebezhet\u0151s\u00e9g alapj\u00e1n jelent\u0151sen egyszer\u0171s\u00edti a jelsz\u00f3 kital\u00e1l\u00e1s\u00e1t. <\/p>\n

A zajok kisz\u0171r\u00e9s\u00e9re jav\u00edtott m\u00f3dszer mellett 75 m\u00e9r\u00e9s elegend\u0151 egy MAC-c\u00edmhez, hogy meghat\u00e1rozzuk az iter\u00e1ci\u00f3k sz\u00e1m\u00e1t. GPU haszn\u00e1lat\u00e1n\u00e1l az egy sz\u00f3t\u00e1ri jelsz\u00f3 kital\u00e1l\u00e1s\u00e1nak er\u0151forr\u00e1s-k\u00f6lts\u00e9ge $1-ra becs\u00fclhet\u0151. A biztons\u00e1gi protokollok meger\u0151s\u00edt\u00e9s\u00e9re ir\u00e1nyul\u00f3 m\u00f3dszereket, amelyek lehet\u0151v\u00e9 teszik a felt\u00e1rt probl\u00e9m\u00e1k blokkol\u00e1s\u00e1t, m\u00e1r be\u00e9p\u00edtett\u00e9k a j\u00f6v\u0151beli Wi-Fi szabv\u00e1nyok v\u00e1zlataiba (WPA 3.1<\/a><\/noindex>, ennek eredm\u00e9nyek\u00e9nt a lek\u00e9rdez\u00e9sek olyan form\u00e1t \u00f6ltenek, mint a fent eml\u00edtett. EAP-pwd<\/a><\/noindex>. Sajnos a jelenlegi protokollverzi\u00f3k visszamen\u0151leges kompatibilit\u00e1s\u00e1nak megs\u00e9rt\u00e9se n\u00e9lk\u00fcl nem lehet elt\u00fcntetni a harmadik f\u00e9l csatorn\u00e1kon t\u00f6rt\u00e9n\u0151 sziv\u00e1rg\u00e1sokat.<\/p>\n

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

Forr\u00e1s: 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\udd47\u00daj sebezhet\u0151s\u00e9gek a WPA3 vezet\u00e9k n\u00e9lk\u00fcli h\u00e1l\u00f3zatv\u00e9delmi technol\u00f3gi\u00e1ban \u00e9s az EAP-pwd-ben | ProHoster","description":"Mathy Vanhoef \u00e9s Eyal Ronen fedezt\u00e9k 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