{"id":80486,"date":"2020-05-06T13:42:20","date_gmt":"2020-05-06T11:42:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/problemy-avtonomnyh-skud-tam-otkuda-ne-zhdali"},"modified":"2020-05-06T13:42:20","modified_gmt":"2020-05-06T11:42:20","slug":"problemy-avtonomnyh-skud-tam-otkuda-ne-zhdali","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/administrirovanie\/problemy-avtonomnyh-skud-tam-otkuda-ne-zhdali","title":{"rendered":"Problemi autonomnih SCUD-a \u2014 Tamo gdje se nismo nadali","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Svima \u017eelim dobar dan. Po\u010det \u0107u s pozadinom koja me potaknula na provo\u0111enje ovog istra\u017eivanja, ali prvo \u0107u upozoriti: sve prakti\u010dne radnje provedene su uz pristanak upravlja\u010dkih struktura. Svaka poku\u0161aj kori\u0161tenja ovog materijala za neovla\u0161teno ulazak na zatvorenu teritoriju predstavlja kazneno djelo. <\/p>\n<p>Sve je po\u010delo kada sam, \u010diste\u0107i stol, slu\u010dajno stavio RFID klju\u010d od ulaza na NFC \u010dita\u010d ACR122 \u2014 koliko sam se iznenadio kada je Windows reproducirao zvuk prepoznavanja novog ure\u0111aja, a LED lampica zasvijetlila zeleno. Do tog trenutka mislio sam da ti klju\u010devi rade isklju\u010divo prema Proximity standardu.<br \/>\n<img decoding=\"async\" alt=\"Problemi autonomnih SCUD-a \u2014 Tamo gdje se nismo nadali\" src=\"\/wp-content\/uploads\/2020\/05\/7f9a2b1189564d55a1eaf41837625e60.jpg\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n Ali ako ga je \u010dita\u010d prepoznao \u2014 zna\u010di da klju\u010d odgovara jednom od protokola iznad ISO 14443 standarda (tj. Near Field Communication, 13,56 MHz). Zaboravio sam na \u010di\u0161\u0107enje jer sam ugledao priliku da se potpuno rije\u0161im klju\u010deva i spremim klju\u010d od ulaza u telefon (stan je ve\u0107 davno opremljen elektroni\u010dkom bravom). Kada sam se po\u010deo istra\u017eivati, otkrio sam da se ispod plastike skriva NFC oznaka Mifare 1k \u2014 ista ona koja se koristi u propusnicama, kartama za javni prijevoz itd. Poku\u0161aji da se u\u0111u u sadr\u017eaj sektora isprva nisu bili uspje\u0161ni, a kada sam nap finally uspio probiti klju\u010d \u2014 otkrio sam da se koristi samo 3. sektor, a u njemu je dupliciran UID samog \u010dipa. Izgledalo je previ\u0161e jednostavno, i zapravo se pokazalo tako, ne bi bilo \u010dlanka da je sve pro\u0161lo onako kako je zami\u0161ljeno. Dobio sam unutra\u0161njost klju\u010da, i nema problema ako je potrebno kopirati klju\u010d na drugi isti. No, pravi zadatak bio je prenijeti klju\u010d na mobilni ure\u0111aj, \u010dime sam se i bavio. Ovdje je po\u010dela zabava \u2014 imamo telefon \u2014 <b>iPhone SE<\/b> s instaliranim <b>iOS 13.4.5 Beta build 17F5044d<\/b> i nekim prilago\u0111enim komponentama za slobodno kori\u0161tenje NFC \u2014 o tome ne\u0107u detaljno pri\u010dati zbog nekih objektivnih razloga. Ako \u017eelite, sve \u0161to slijedi primjenjivo je i za Android sustav, ali uz neka pojednostavljenja.<\/p>\n<p><b>Popis zadataka za rje\u0161avanje:<\/b><\/p>\n<ul>\n<li><b>Dohvatiti pristup sadr\u017eaju klju\u010da.<\/b><\/li>\n<li><b>Implementirati mogu\u0107nost emulacije klju\u010da ure\u0111ajem.<\/b><\/li>\n<\/ul>\n<p>\n Ako je s prvim bilo relativno jednostavno, s drugim su se pojavili problemi. Prva verzija emulatora nije radila. Problem je otkriven prili\u010dno brzo \u2013 na mobilnim ure\u0111ajima (bilo da se radi o iOS-u ili Androidu) u re\u017eimu emulacije, UID je dinami\u010dan i neovisno od onoga \u0161to je zapisano u slici \u2013 menja se. Druga verzija (pokrenuta s administratorskim pravima) fiksirala je serijski broj na odabranom \u2013 vrata su se otvorila. Me\u0111utim, \u017eeleo sam u\u010diniti sve savr\u0161eno, i na kraju sam sastavio zavr\u0161nu verziju emulatora koja je mogla otvarati Mifare dump-ove i emulirati ih. Podleg\u043d\u0443\u0432 naglom porivu, promenio sam klju\u010deve sektora na proizvoljne, i poku\u0161ao otvoriti vrata. I ona\u2026 <i>\u2026 OTVORILA! <\/i> Nakon nekog vremena shvatio sam da se otvaraju <i>bilo koja<\/i> vrata s tim zaklju\u010davanjem, \u010dak i ona za koja izvorni klju\u010d nije odgovarao. U vezi s tim formirao sam novu listu zadataka za izvr\u0161enje:<\/p>\n<ul>\n<li><b>Utvrditi koji kontroler odgovara za rad s klju\u010devima<\/b> <\/li>\n<li><b>Shvatiti postoji li povezanost s mre\u017eom i zajedni\u010dka baza<\/b> <\/li>\n<li><b>Utvrditi za\u0161to zapravo ne\u010ditljivi klju\u010d postaje univerzalan<\/b> <\/li>\n<\/ul>\n<p>\nPosle razgovora s in\u017eenjerom upravlja\u010dke kompanije saznao sam da se koriste jednostavni kontroleri Iron Logic z5r bez povezivanja s vanjskom mre\u017eom.<\/p>\n<p>                        <b class=\"spoiler_title\">\u010cita\u010d CP-Z2 MF i kontroler IronLogic z5r<\/b><br \/>\n                         Dobio sam skup opreme za eksperimente:<\/p>\n<p><img decoding=\"async\" alt=\"Problemi autonomnih SCUD-a \u2014 Tamo gdje se nismo nadali\" src=\"\/wp-content\/uploads\/2020\/05\/24229d027cb7c55ec8aa20eb269ac7e6.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\nKako se ovde mo\u017ee razumeti \u2014 sistem je potpuno autonoman i izuzetno primitivan. Prvo sam pomislio da je kontroler u re\u017eimu u\u010denja \u2014 smisao tog re\u017eima je da \u010dita klju\u010d, unosi ga u memoriju i otvara vrata \u2014 ovaj re\u017eim se koristi kada je potrebno zapisati sve klju\u010deve, na primer pri zameni brave u stambenoj zgradi. Ali ova teorija nije potvr\u0111ena \u2014 programski je ovaj re\u017eim isklju\u010den, jumper je u radnom polo\u017eaju \u2014 i pored toga, kada pribli\u017eimo ure\u0111aj, vidimo slede\u0107e:<\/p>\n<p>                        <b class=\"spoiler_title\">Screenshot procesa emulacije na ure\u0111aju<\/b><br \/>\n                        <img decoding=\"async\" alt=\"Problemi autonomnih SCUD-a \u2014 Tamo gdje se nismo nadali\" src=\"\/wp-content\/uploads\/2020\/05\/ba774fc83aafde90d0ce680717cdbd9b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n\u2026 i kontroler signalizira da je pristup odobren.<\/p>\n<p>To zna\u010di da je problem u softveru ili kontrolera, ili \u010dita\u010da. Proverimo \u010dita\u010d \u2014 on radi u iButton re\u017eimu, pa \u0107emo povezati sigurnosnu plo\u010du Bolid \u2014 imamo mogu\u0107nost da vidimo izlazne podatke sa \u010dita\u010da.<\/p>\n<p>                        <b class=\"spoiler_title\">Plo\u010da \u0107e biti povezana kasnije putem RS232<\/b><br \/>\n                        <img decoding=\"async\" alt=\"Problemi autonomnih SCUD-a \u2014 Tamo gdje se nismo nadali\" src=\"\/wp-content\/uploads\/2020\/05\/2960cec6f70f0abd98557a28e54eca6f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\nMetodom vi\u0161estrukih poku\u0161aja utvr\u0111ujemo da \u010dita\u010d prenosi isti kod u slu\u010daju neuspjeha autorizacije: 1219191919<\/p>\n<p>Situacija po\u010dinje postajati jasnija, no trenutno mi nije jasno za\u0161to se kontroler pozitivno odaziva na ovaj kod. Postoji pretpostavka \u2014 da je prilikom popunjavanja baze slu\u010dajno ili namjerno bila prilo\u017eena kartica s drugim klju\u010devima sektora \u2014 \u010dita\u010d je poslao ovaj kod i kontroler ga je pohranio. Na\u017ealost, nemam originalni programator od IronLogic da zavirim u bazu klju\u010deva kontrolera, ali se nadam da sam uspio skrenuti pa\u017enju na to da problem postoji. Video demonstracija rada s ovom ranjivo\u0161\u0107u dostupna je <noindex><a rel=\"nofollow\" href=\"https:\/\/vk.com\/video104139075_456239166\">na linku<\/a><\/noindex>.<\/p>\n<p>P.S. Protiv teorije o slu\u010dajnom dodavanju govori i \u010dinjenica da sam u jednom poslovnom centru Krasnojarska uspio otvoriti vrata ovom istom metodom.<br \/>\n<br \/>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/500396\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435\u043c \u0434\u043e\u0431\u0440\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0441\u0443\u0442\u043e\u043a. \u041d\u0430\u0447\u043d\u0443 \u0441 \u043f\u0440\u0435\u0434\u044b\u0441\u0442\u043e\u0440\u0438\u0438, \u043e \u0442\u043e\u043c, \u0447\u0442\u043e \u043c\u0435\u043d\u044f \u043f\u043e\u0431\u0443\u0434\u0438\u043b\u043e \u043f\u0440\u043e\u0432\u0435\u0441\u0442\u0438 \u0434\u0430\u043d\u043d\u043e\u0435 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435, \u043d\u043e \u043f\u0440\u0435\u0436\u0434\u0435 \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0436\u0443: \u0432\u0441\u0435 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u0431\u044b\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u044b \u0441 \u0441\u043e\u0433\u043b\u0430\u0441\u0438\u044f \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440. \u041b\u044e\u0431\u0430\u044f \u043f\u043e\u043f\u044b\u0442\u043a\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0439 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u0432 \u0446\u0435\u043b\u044f\u0445 \u043f\u0440\u043e\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u044f \u043d\u0430 \u0437\u0430\u043a\u0440\u044b\u0442\u0443\u044e \u0442\u0435\u0440\u0440\u0438\u0442\u043e\u0440\u0438\u044e \u0431\u0435\u0437 \u043f\u0440\u0430\u0432\u0430 \u0442\u0430\u043c \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u044c\u0441\u044f \u2014 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0443\u0433\u043e\u043b\u043e\u0432\u043d\u044b\u043c \u043f\u0440\u0430\u0432\u043e\u043d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435\u043c. \u041d\u0430\u0447\u0430\u043b\u043e\u0441\u044c \u0432\u0441\u0435 \u0441 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u0443\u0431\u0438\u0440\u0430\u044f\u0441\u044c \u043d\u0430 \u0441\u0442\u043e\u043b\u0435, \u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":80487,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-80486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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