{"id":121455,"date":"2025-01-23T15:46:01","date_gmt":"2025-01-23T13:46:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/iz-za-opechatki-v-nastrojkah-atakuyushhie-mogli-podmenit-dns-server-mastercard"},"modified":"2026-02-04T17:53:52","modified_gmt":"2026-02-04T15:53:52","slug":"iz-za-opechatki-v-nastrojkah-atakuyushhie-mogli-podmenit-dns-server-mastercard","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/iz-za-opechatki-v-nastrojkah-atakuyushhie-mogli-podmenit-dns-server-mastercard","title":{"rendered":"Due to a typo in the settings, attackers could substitute the DNS server for MasterCard.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Seralys biztons\u00e1gi kutat\u00f3ja felfedezte a DNS-szerver cser\u00e9l\u00e9s\u00e9nek lehet\u0151s\u00e9g\u00e9t a mastercard.com domain eset\u00e9ben, amelyet a MasterCard fizet\u00e9si rendszer infrastrukt\u00far\u00e1j\u00e1ban haszn\u00e1lnak. A mastercard.com domain z\u00f3n\u00e1j\u00e1nak be\u00e1ll\u00edt\u00e1saiban 2020 j\u00faniusa \u00f3ta helyes\u00edr\u00e1si hiba szerepelt - a DNS-szerverek list\u00e1j\u00e1ban a «a22-65.akam.net» (Akamai DNS-szolg\u00e1ltat\u00e1s) helyett a «a22-65.akam.ne» hosztot t\u00fcntett\u00e9k fel. A «.ne» gy\u00f6k\u00e9rz\u00f3na Niger K\u00f6zt\u00e1rsas\u00e1ghoz tartozik, \u00edgy az «akam.ne» domain el\u00e9rhet\u0151v\u00e9 v\u00e1lt \u00e9rt\u00e9kes\u00edt\u00e9sre. <\/p>\n

\u00cdgy teh\u00e1t n\u00e9gy \u00e9s f\u00e9l \u00e9vig b\u00e1rki, aki akarta, domaint v\u00e1s\u00e1rolni<\/a> Az «akam.ne» domain alatt lehet\u0151s\u00e9g ny\u00edlt hoszt l\u00e9trehoz\u00e1s\u00e1ra az «a22-65.akam.ne» n\u00e9ven, DNS-szerver telep\u00edt\u00e9s\u00e9re, saj\u00e1t mastercard.com DNS-z\u00f3na l\u00e9trehoz\u00e1s\u00e1ra \u00e9s b\u00e1rmely mastercard.com aldomain \u00e1thelyez\u00e9s\u00e9re saj\u00e1t szerver\u00e9re. A mastercard.com eset\u00e9ben nem haszn\u00e1ltak DNSSEC-et. Mivel a hiba az \u00f6t DNS-szerver egyik\u00e9nek nev\u00e9ben t\u00f6rt\u00e9nt, sikeres t\u00e1mad\u00e1s eset\u00e9n legal\u00e1bb 1\/5 forgalom felett lehetett volna ellen\u0151rz\u00e9st szerezni. A hat\u00f3k\u00f6r n\u00f6velhet\u0151 lett volna, ha a hamis z\u00f3n\u00e1hoz nagy TTL (Time To Live) \u00e9rt\u00e9ket \u00e1ll\u00edtanak be, amely hosszabb idej\u0171 t\u00e1rol\u00e1st okozna a nyilv\u00e1nos felold\u00f3k mem\u00f3ria cache-\u00e9ben, p\u00e9ld\u00e1ul a Cloudflare (1.1.1.1) \u00e9s a Google (8.8.8.8) \u00e1ltal t\u00e1mogatott szolg\u00e1ltat\u00e1sokn\u00e1l.

\"Due<\/center> <\/p>\n

A megl\u00e9v\u0151 hosztok forgalm\u00e1nak lehallgat\u00e1sa mellett lehet\u0151s\u00e9g ny\u00edlt egy kev\u00e9sb\u00e9 \u00e9szlelhet\u0151 t\u00e1mad\u00e1sra is, amely egy eredetileg nem l\u00e9tez\u0151 aldomain l\u00e9trehoz\u00e1s\u00e1t tette lehet\u0151v\u00e9 a phishing-jelleg\u0171 tev\u00e9kenys\u00e9ghez, p\u00e9ld\u00e1ul l\u00e9trehozni egy «redemtion.mastercard.com» hosztot, \u00e9s azt haszn\u00e1lni spamk\u00e9nt a «redemption.mastercard.com» leg\u00e1lis bel\u00e9p\u00e9si pont helyett. Emellett, ha valaki ellen\u0151rz\u00e9st szerez egy Mastercard.com domain al\u00e1 tartoz\u00f3 DNS-szerver felett, lehet\u0151s\u00e9ge ny\u00edlik arra, hogy TLS-tan\u00fas\u00edtv\u00e1ny<\/a> olyan szolg\u00e1ltat\u00e1sokhoz f\u00e9rjen hozz\u00e1, amelyek lehet\u0151v\u00e9 teszik a domain tulajdonjog\u00e1nak ellen\u0151rz\u00e9s\u00e9t Weben vagy DNS-en kereszt\u00fcl, p\u00e9ld\u00e1ul a Let’s Encrypt eset\u00e9ben. A lehets\u00e9ges t\u00e1mad\u00e1si forgat\u00f3k\u00f6nyvek k\u00f6z\u00f6tt eml\u00edt\u00e9st nyert egy hamis levelez\u0151szerver l\u00e9trehoz\u00e1sa is, amelynek c\u00e9lja a n\u00e9v@mastercard.com e-mailek lehallgat\u00e1sa, valamint hiteles\u00edt\u00e9si adatok lehallgat\u00e1sa a Windows oper\u00e1ci\u00f3s rendszert haszn\u00e1l\u00f3 alkalmazottak g\u00e9peir\u0151l. <\/p>\n

A kutat\u00f3, aki felfedte a probl\u00e9m\u00e1kat, megv\u00e1s\u00e1rolta az \"akam.ne\" domaint 300 doll\u00e1r\u00e9rt, \u00e9s DNS-sniffert ind\u00edtott rajta a forgalom mennyis\u00e9g\u00e9nek felm\u00e9r\u00e9s\u00e9re. Az elemzett k\u00e9r\u00e9sek azt mutatt\u00e1k, hogy a MasterCard esete nem egyed\u00fcl\u00e1ll\u00f3, \u00e9s m\u00e1s domainek is szerepelnek azoknak a DNS-szervereknek a list\u00e1j\u00e1n, amelyekn\u00e9l a \"akam.ne\" host szerepel az \"akam.net\" helyett. R\u00e1ad\u00e1sul kider\u00fclt, hogy az \"akam.ne\" domaint 2015 \u00e9s 2018 k\u00f6z\u00f6tt regisztr\u00e1lt\u00e1k, \u00e9s val\u00f3sz\u00edn\u0171leg t\u00e1mad\u00e1sok v\u00e9grehajt\u00e1s\u00e1ra haszn\u00e1lt\u00e1k. A t\u00e1mad\u00e1sokra tett felt\u00e9telez\u00e9st az indokolja, hogy az \"akam.ne\" kor\u00e1bbi tulajdonosa regisztr\u00e1lta az \"awsdns-06.ne\" domaint is, amely az \"awsdns-06.net\" DNS-serverre hasonl\u00edt. Az egyik DNS-szerver, amelynek neve el\u00edr\u00e1s miatt nem m\u0171k\u00f6dik, sok\u00e1ig \u00e9szrev\u00e9tlen maradhat az adminisztr\u00e1torok sz\u00e1m\u00e1ra, mivel a rendelkez\u00e9sre \u00e1ll\u00e1st t\u00f6bb DNS-szerver megad\u00e1s\u00e1val biztos\u00edtj\u00e1k. <\/p>\n

A MasterCard v\u00e1llalat el\u0151sz\u00f6r figyelmen k\u00edv\u00fcl hagyta a probl\u00e9m\u00e1r\u00f3l sz\u00f3l\u00f3 jelent\u00e9st, de miut\u00e1n Brian Krebs \u00fajs\u00e1g\u00edr\u00f3 kapcsolatba l\u00e9pett vel\u00fck, elismert\u00e9k \u00e9s jav\u00edtott\u00e1k a hib\u00e1t, kijelentve, hogy az nem jelentett fenyeget\u00e9st az infrastrukt\u00far\u00e1val kapcsolatban. Ezt k\u00f6vet\u0151en a Bugcrowd szolg\u00e1ltat\u00e1son kereszt\u00fcl, mely lehet\u0151v\u00e9 teszi a felfedezett sebezhet\u0151s\u00e9gek ut\u00e1ni d\u00edjak beszerz\u00e9s\u00e9t, a kutat\u00f3 sz\u00e1m\u00e1ra \u00e1tir\u00e1ny\u00edtott\u00e1k a MasterCard k\u00e9r\u00e9s\u00e9t a nyilv\u00e1noss\u00e1gra hozott incidens jegyzet elt\u00e1vol\u00edt\u00e1s\u00e1ra. <\/p>\n

A kutat\u00f3 v\u00e1lasz\u00e1ban elmondta, hogy b\u00e1r van sz\u00e1ml\u00e1ja a Bugcrowd szolg\u00e1ltat\u00e1sban, nem ny\u00fajtott be k\u00e9relmet d\u00edj\u00e9rt, hanem k\u00f6zvetlen\u00fcl \u00e9rtes\u00edtette a MasterCard-ot a probl\u00e9m\u00e1r\u00f3l. A megjegyz\u00e9st az\u00e9rt tett\u00e9k k\u00f6zz\u00e9, hogy felh\u00edvj\u00e1k a figyelmet a probl\u00e9m\u00e1ra, miut\u00e1n a MasterCard-nak m\u00e1r nem volt vesz\u00e9lye, \u00e9s a domain az \u0151 birtok\u00e1ban volt. V\u00e9g\u00fcl a MasterCard nemcsak hogy nem t\u00e9r\u00edtette meg a domainre k\u00f6lt\u00f6tt 300 doll\u00e1rt, de m\u00e9g csak szavakkal sem k\u00f6sz\u00f6nte meg a kutat\u00f3 munk\u00e1j\u00e1t. <\/p>\n

Ami a kijelent\u00e9st illeti, miszerint a hiba nem okozott tov\u00e1bbi kock\u00e1zatokat, a kutat\u00f3 bemutatta a DNS-k\u00e9r\u00e9sek statisztik\u00e1j\u00e1t, amelyben az *.az.mastercard.com domainek szerepelnek, utalva a MasterCard infrastrukt\u00far\u00e1j\u00e1nak m\u0171k\u00f6d\u0151 komponenseire, amelyek a Microsoft Azure felh\u0151szolg\u00e1ltat\u00e1s\u00e1ban tal\u00e1lhat\u00f3k. Az ilyen komponensek kompromitt\u00e1l\u00e1sa l\u00e1that\u00f3an kritikus biztons\u00e1gi fenyeget\u00e9st jelentett.

\"Due<\/center>
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Seralys \u0432\u044b\u044f\u0432\u0438\u043b \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u043c\u0435\u043d\u044b DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u0434\u043e\u043c\u0435\u043d\u0430 mastercard.com, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435 \u043f\u043b\u0430\u0442\u0451\u0436\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b MasterCard. \u0412 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 \u0434\u043e\u043c\u0435\u043d\u043d\u043e\u0439 \u0437\u043e\u043d\u044b mastercard.com \u0441 \u0438\u044e\u043d\u044f 2020 \u0433\u043e\u0434\u0430 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u043e\u0432\u0430\u043b\u0430 \u043e\u043f\u0435\u0447\u0430\u0442\u043a\u0430 — \u0432 \u0441\u043f\u0438\u0441\u043a\u0435 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0445 \u0437\u043e\u043d\u0443 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0432\u043c\u0435\u0441\u0442\u043e \u0445\u043e\u0441\u0442\u0430 «a22-65.akam.net» (DNS-\u0441\u043b\u0443\u0436\u0431\u0430 Akamai) \u0431\u044b\u043b \u0443\u043a\u0430\u0437\u0430\u043d \u0445\u043e\u0441\u0442 «a22-65.akam.ne». \u041a\u043e\u0440\u043d\u0435\u0432\u0430\u044f \u0437\u043e\u043d\u0430 «.ne» \u0437\u0430\u043a\u0440\u0435\u043f\u043b\u0435\u043d\u0430 \u0437\u0430 \u0420\u0435\u0441\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0439 \u041d\u0438\u0433\u0435\u0440 \u0438 \u0434\u043e\u043c\u0435\u043d «akam.ne» \u043e\u043a\u0430\u0437\u0430\u043b\u0441\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":121456,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-121455","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\udd47A MasterCard DNS-szerver\u00e9nek megv\u00e1ltoztat\u00e1s\u00e1ra az agresszorok egy el\u00edr\u00e1s miatt k\u00e9pesek voltak | ProHoster","description":"A Seralys v\u00e1llalat biztons\u00e1gi kutat\u00f3ja felfedezte a lehet\u0151s\u00e9get a mastercard.com domain DNS-szerver\u00e9nek \u00e1tnevez\u00e9s\u00e9re, amelyet a MasterCard fizet\u00e9si rendszer infrastrukt\u00far\u00e1j\u00e1ban haszn\u00e1lnak.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/iz-za-opechatki-v-nastrojkah-atakuyushhie-mogli-podmenit-dns-server-mastercard","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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\u0418\u0437-\u0437\u0430 \u043e\u043f\u0435\u0447\u0430\u0442\u043a\u0438 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0435 \u043c\u043e\u0433\u043b\u0438 \u043f\u043e\u0434\u043c\u0435\u043d\u0438\u0442\u044c DNS-\u0441\u0435\u0440\u0432\u0435\u0440 MasterCard | 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