{"id":117239,"date":"2024-07-10T15:43:03","date_gmt":"2024-07-10T13:43:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-protokole-radius-pozvolyayushhaya-poddelat-otvet-pri-autentifikaczii"},"modified":"2024-07-10T15:43:03","modified_gmt":"2024-07-10T13:43:04","slug":"uyazvimost-v-protokole-radius-pozvolyayushhaya-poddelat-otvet-pri-autentifikaczii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-protokole-radius-pozvolyayushhaya-poddelat-otvet-pri-autentifikaczii","title":{"rendered":"Dob\u00ebsi n\u00eb protokollin RADIUS q\u00eb lejon falsifikimin e p\u00ebrgjigjes gjat\u00eb autentikimit","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nj\u00eb grup k\u00ebrkuesish nga disa universitete amerikane dhe kompanit\u00eb Cloudflare dhe Microsoft shpik\u00ebn nj\u00eb teknik\u00eb t\u00eb re sulmi ndaj protokollit RADIUS, i p\u00ebrdorur nga operator\u00ebt e komunikimit, sh\u00ebrbimet cloud dhe ofruesit e VPN p\u00ebr autentifikimin, autorizimin dhe llogaritjen e p\u00ebrdoruesve. Sulmi, i njohur me emrin Blast-RADIUS, mund\u00ebson falsifikimin e p\u00ebrgjigjes s\u00eb serverit RADIUS gjat\u00eb autentifikimit dhe organizimin e lidhjes s\u00eb abonentit pa e ditur fjal\u00ebkalimin.     <\/p>\n<p>P\u00ebr t\u00eb shfryt\u00ebzuar k\u00ebt\u00eb dob\u00ebsi (CVE-2024-3596), sulmuesi duhet t\u00eb ket\u00eb mund\u00ebsin\u00eb e kapjes s\u00eb trafik transit dhe kryerjen e nj\u00eb sulmi t\u00eb plot\u00eb MITM, i cili lejon t\u00eb lexoj\u00eb, kap\u00eb, bllokoj\u00eb dhe modifikoj\u00eb paketat UDP q\u00eb vijn\u00eb dhe dalin, t\u00eb d\u00ebrguara nga piketat e qasjes p\u00ebr t\u00eb k\u00ebrkuar autentifikimin e klient\u00ebve (Access-Request) dhe t\u00eb kthehen nga serveri RADIUS me konfirmimin apo refuzimin e operacionit. Pasi t\u00eb kap\u00eb k\u00ebrkes\u00ebn e autentifikimit, sulmuesi mund t\u00eb d\u00ebrgoj\u00eb nj\u00eb p\u00ebrgjigje false, duke treguar n\u00eb k\u00ebt\u00eb p\u00ebrgjigje nj\u00eb tip tjet\u00ebr rezultati (p.sh., Access-Accept n\u00eb vend t\u00eb Access-Reject). Sulmuesi gjithashtu potencialisht mund t\u00eb kap\u00eb p\u00ebrgjigjen Access-Challenge, e cila p\u00ebrdoret gjat\u00eb autentifikimit me dy faktor\u00eb, dhe ta z\u00ebvend\u00ebsoj\u00eb at\u00eb me p\u00ebrgjigjen Access-Accept p\u00ebr t\u00eb anashkaluar kalimin e hapit t\u00eb d\u00ebshmis\u00eb shtes\u00eb.    <center><img decoding=\"async\" alt=\"Dob\u00ebsi n\u00eb protokollin RADIUS q\u00eb lejon falsifikimin e p\u00ebrgjigjes gjat\u00eb autentikimit\" src=\"\/wp-content\/uploads\/2024\/07\/387db9c9f51c3eebe36f97bf178eb451.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Sulmi bazohet n\u00eb faktin se protokolli RADIUS p\u00ebrdor UDP si transport dhe verifikon integritetin e mesazheve t\u00eb d\u00ebrguara p\u00ebrmes algoritmit MD5. P\u00ebr verifikimin e mesazheve, t\u00eb d\u00ebrguara midis <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/server\/dts-prohoster\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3085\">server<\/a> aksesit dhe serverit RADIUS, aplikohet nj\u00eb \u00e7el\u00ebs sekret, i njohur nga pika e qasjes dhe serveri RADIUS, por i panjohur p\u00ebr sulmuesin. N\u00eb p\u00ebrgjigje t\u00eb k\u00ebrkes\u00ebs p\u00ebr autentifikim, serveri RADIUS gjeneron nj\u00eb hash MD5, me an\u00eb t\u00eb t\u00eb cilit serveri i aksesit mund t\u00eb verifikoj\u00eb se mesazhi \u00ebsht\u00eb d\u00ebrguar nga nj\u00eb server i autorizuar. Hash-i MD5 mbulon vler\u00ebn e rast\u00ebsishme t\u00eb d\u00ebrguar n\u00eb k\u00ebrkes\u00eb, identifikuesin e k\u00ebrkes\u00ebs, atributet e kthyer dhe \u00e7el\u00ebsin sekret.    <\/p>\n<p>Nj\u00eb sulmues gjat\u00eb nj\u00eb sulmi MITM mund t\u00eb kap\u00eb identifikuesin dhe vler\u00ebn rast\u00ebsor t\u00eb d\u00ebrguar n\u00eb k\u00ebrkes\u00eb, dhe gjithashtu mund t\u00eb parashikoj\u00eb kodin e operacionit, madh\u00ebsin\u00eb dhe atributet. Detyra p\u00ebrfundon n\u00eb formimin e nj\u00eb hash verifikues korrekt, i cili do t\u00eb p\u00ebrputhet me rezultatin e nd\u00ebrruar t\u00eb operacionit dhe do t\u00eb kaloj\u00eb verifikimin p\u00ebrmes hash-it me p\u00ebrdorimin e \u00e7el\u00ebsit sekret. Algoritmi MD5 nuk \u00ebsht\u00eb i q\u00ebndrush\u00ebm ndaj gjetjes s\u00eb kolizionit, \u00e7ka i lejon sulmuesit, duke manipuluar me mbushjen plot\u00ebsuese pa r\u00ebnd\u00ebsi, t\u00eb gjej\u00eb nj\u00eb kombinim t\u00eb t\u00eb dh\u00ebnave me parametrat e nevojsh\u00ebm, hash-i MD5 i t\u00eb cilit do t\u00eb p\u00ebrputhet me hash-in MD5 t\u00eb p\u00ebrgjigjes fillestare, dhe t\u00eb d\u00ebrgoj\u00eb nj\u00eb p\u00ebrgjigje t\u00eb rreme me kodin e pranimit t\u00eb suksesit t\u00eb autentikimit (Access-Accept) n\u00eb vend t\u00eb mesazhit me informacion mbi gabimin.     <center><img decoding=\"async\" alt=\"Dob\u00ebsi n\u00eb protokollin RADIUS q\u00eb lejon falsifikimin e p\u00ebrgjigjes gjat\u00eb autentikimit\" src=\"\/wp-content\/uploads\/2024\/07\/271cb7d8b85b87ba3517ba6baac6e790.png\" style=\"display:block;margin: 0 auto;\" \/><\/center>      <\/p>\n<p>Duke qen\u00eb se gjat\u00eb p\u00ebrpunimit t\u00eb paketave me k\u00ebrkes\u00eb akses (Access-Request) nuk aplikohet autentikimi dhe verifikimi i integritetit, gjat\u00eb sulmit n\u00eb k\u00ebrkes\u00ebn origjinale nga <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sq\/server\/dts-los-angeles\/\"   title=\"server\u00eb\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3927\">server\u00eb<\/a> n\u00ebse nj\u00eb sulmues ka qasje, ai mund t\u00eb shtoj\u00eb nj\u00eb atribut t\u00eb weiteres \"Proxy-State\", i cili do t\u00eb reflektohet nga serveri RADIUS n\u00eb p\u00ebrgjigjen e tij. P\u00ebrmbajtja \"Proxy-State\" zgjidhet duke u marr\u00eb parasysh kolizionin, n\u00eb m\u00ebnyr\u00eb q\u00eb vlera e hash-it verifikues MD5 n\u00eb p\u00ebrgjigjet reale dhe t\u00eb falsifikuara t\u00eb jet\u00eb identike. Gjat\u00eb eksperimentit, k\u00ebrkimi i kolizionit n\u00eb MD5 p\u00ebr t\u00eb kryer sulmin zgjati 3-6 minuta, q\u00eb \u00ebsht\u00eb m\u00eb shum\u00eb se koha tipike e skadimit prej 30-60 sekondash, por koha e k\u00ebrkimit t\u00eb kolizionit mund t\u00eb reduktohet duke p\u00ebrdorur pajisje m\u00eb t\u00eb fuqishme, angazhimin e GPU-ve dhe paralelizimin e operacioneve.                       <\/p>\n<p>Si mas\u00eb kryesore p\u00ebr mbrojtjen nga k\u00ebsaj dob\u00ebsie, rekomandohet p\u00ebrdorimi i protokollit EAP (Extensible Authentication Protocol, RFC 3579), n\u00eb t\u00eb cilin p\u00ebr verifikimin shtes\u00eb t\u00eb mesazheve p\u00ebrdoret atributi Message-Authenticator. P\u00ebr mbrojtje nga sulmi gjithashtu mund t\u00eb p\u00ebrdoren zgjerime t\u00eb protokollit (RadSec), q\u00eb p\u00ebrfshijn\u00eb transmetimin e mesazheve RADIUS p\u00ebrmes kanaleve t\u00eb enkriptuara mbi TLS ose DTLS. P\u00ebr m\u00eb tep\u00ebr, mund t\u00eb minimizohen vlerat e koh\u00ebs s\u00eb pritjes p\u00ebr marrjen e p\u00ebrgjigjeve dhe t\u00eb bllokohen p\u00ebrgjigjet me atributin Proxy-State. Transmetimi i mesazheve RADIUS mbi TCP e komplikon sulmin, por nuk p\u00ebrjashton mund\u00ebsin\u00eb e kryerjes s\u00eb tij.     <\/p>\n<p>Kodi p\u00ebr kryerjen e sulmit nuk \u00ebsht\u00eb publikuar ende n\u00eb akses t\u00eb hapur, por projekti hashclash ka marr\u00eb ndryshime q\u00eb p\u00ebrmir\u00ebsojn\u00eb gjetjen e kolizioneve n\u00eb MD5 duke marr\u00eb parasysh specifik\u00ebn e sulmit. N\u00eb serverin RADIUS FreeRADIUS, problemi \u00ebsht\u00eb zgjidhur n\u00eb versionet 3.0.27 dhe 3.2.5 duke p\u00ebrfshir\u00eb detyrimin e p\u00ebrdorimit t\u00eb atributeve Message-Authenticator dhe duke shtuar nj\u00eb konfigurim p\u00ebr t\u00eb kufizuar p\u00ebrpunimin e pacaketes me atributin Proxy-State.<br \/>\n<br \/>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61517\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0430\u043c\u0435\u0440\u0438\u043a\u0430\u043d\u0441\u043a\u0438\u0445 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u043e\u0432 \u0438 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Cloudflare \u0438 Microsoft \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0430 \u043d\u043e\u0432\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b RADIUS, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0439 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430\u043c\u0438 \u0441\u0432\u044f\u0437\u0438, \u043e\u0431\u043b\u0430\u0447\u043d\u044b\u043c\u0438 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u043c\u0438 \u0438 VPN-\u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u0430\u043c\u0438 \u0434\u043b\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, \u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0430\u0446\u0438\u0438 \u0438 \u0430\u043a\u043a\u0430\u0443\u043d\u0442\u0438\u043d\u0433\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439. \u0410\u0442\u0430\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u043b\u0430 \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f Blast-RADIUS, \u0434\u0430\u0451\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u043b\u0430\u0442\u044c \u043e\u0442\u0432\u0435\u0442 RADIUS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043f\u0440\u0438 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u0438 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u0430\u0431\u043e\u043d\u0435\u043d\u0442\u0430 \u0431\u0435\u0437 \u0437\u043d\u0430\u043d\u0438\u044f \u043f\u0430\u0440\u043e\u043b\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0414\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":117240,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-117239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0438\u0437 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0430\u043c\u0435\u0440\u0438\u043a\u0430\u043d\u0441\u043a\u0438\u0445 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u043e\u0432 \u0438 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Cloudflare \u0438 Microsoft \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0430 \u043d\u043e\u0432\u0443\u044e \u0442\u0435\u0445\u043d\u0438\u043a\u0443 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b RADIUS, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u044b\u0439 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430\u043c\u0438 \u0441\u0432\u044f\u0437\u0438, \u043e\u0431\u043b\u0430\u0447\u043d\u044b\u043c\u0438 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u043c\u0438 \u0438.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-protokole-radius-pozvolyayushhaya-poddelat-otvet-pri-autentifikaczii\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2\" \/>\n\t\t<meta property=\"og:locale\" content=\"sq_AL\" \/>\n\t\t<meta property=\"og:site_name\" content=\"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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 RADIUS, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u043b\u0430\u0442\u044c \u043e\u0442\u0432\u0435\u0442 \u043f\u0440\u0438 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0413\u0440\u0443\u043f\u043f\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 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