{"id":123627,"date":"2025-04-22T09:05:07","date_gmt":"2025-04-22T07:05:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-udostoveryayushhem-czentre-ssl-com-pozvolyavshaya-poluchit-sertifikat-dlya-chuzhogo-domena"},"modified":"2025-04-22T09:05:07","modified_gmt":"2025-04-22T07:05:07","slug":"uyazvimost-v-udostoveryayushhem-czentre-ssl-com-pozvolyavshaya-poluchit-sertifikat-dlya-chuzhogo-domena","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-udostoveryayushhem-czentre-ssl-com-pozvolyavshaya-poluchit-sertifikat-dlya-chuzhogo-domena","title":{"rendered":"SSL.com tan\u00fas\u00edtv\u00e1nyt igazol\u00f3 k\u00f6zpontj\u00e1nak sebezhet\u0151s\u00e9ge, amely lehet\u0151v\u00e9 tette, hogy tan\u00fas\u00edtv\u00e1nyt kapjanak egy idegen domainhez","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az SSL.com hiteles\u00edt\u00e9si k\u00f6zpontj\u00e1ban olyan s\u00e9r\u00fcl\u00e9kenys\u00e9get fedeztek fel, amely lehet\u0151v\u00e9 tette a domain birtokl\u00e1s\u00e1nak ellen\u0151rz\u00e9si rendszer\u00e9nek megker\u00fcl\u00e9s\u00e9t, \u00edgy b\u00e1rki TLS-tan\u00fas\u00edtv\u00e1nyt kaphatott b\u00e1rmely domainhez, ha az t\u00e1mad\u00f3nak k\u00fcld\u00f6tt email c\u00edmet megadott. A TLS-tan\u00fas\u00edtv\u00e1ny megszerz\u00e9s\u00e9hez elegend\u0151 volt hozz\u00e1f\u00e9rni az adott domainhez tartoz\u00f3 email fi\u00f3khoz. P\u00e9ld\u00e1ul a s\u00e9r\u00fcl\u00e9kenys\u00e9g lehet\u0151v\u00e9 tette, hogy TLS-tan\u00fas\u00edtv\u00e1nyt szerezzenek olyan domainekhez, amelyeket nyilv\u00e1nos email szolg\u00e1ltat\u00e1sok, mint p\u00e9ld\u00e1ul gmail.com, yandex.ru, yahoo.com, outlook.com \u00e9s icloud.com haszn\u00e1ltak. <\/p>\n

A s\u00e9r\u00fcl\u00e9kenys\u00e9g emellett lehet\u0151s\u00e9get adott a t\u00e1mad\u00f3knak, hogy c\u00e9lzott t\u00e1mad\u00e1sokat ind\u00edtsanak h\u00edres c\u00e9gek alkalmazottai \u00e9s nagyobb projektek r\u00e9sztvev\u0151i ellen, hogy megszerezz\u00e9k az emailjeiket \u00e9s TLS-tan\u00fas\u00edtv\u00e1nyokat hozzanak l\u00e9tre neves domainokhoz. domainok<\/a>. P\u00e9ld\u00e1ul, ha egy Google alkalmazott email c\u00edme name@google.com, akkor a t\u00e1mad\u00f3 sz\u00e1m\u00e1ra lehet\u0151v\u00e9 v\u00e1lt. a certificate for a domain<\/a> teljesen azonos\u00edtott, m\u00edg <\/p>\n

A sebezhet\u0151s\u00e9g egy e-mailes domainjogosults\u00e1g-ellen\u0151rz\u00e9si rendszer implement\u00e1ci\u00f3j\u00e1nak hib\u00e1j\u00e1b\u00f3l ad\u00f3dott. Az e-mailes meger\u0151s\u00edt\u00e9shez a tan\u00fas\u00edtv\u00e1nyra beny\u00fajtott domain DNS-z\u00f3n\u00e1j\u00e1ba egy DNS TXT rekordot kell hozz\u00e1adni, amely a k\u00f6vetkez\u0151: «_validation-contactemail». P\u00e9ld\u00e1ul: «_validation-contactemail.test.com DNS TXT name@example.com». A domainellen\u0151rz\u00e9s kezdem\u00e9nyez\u00e9se ut\u00e1n a name@examle.com e-mail c\u00edmre meger\u0151s\u00edt\u0151 k\u00f3dot k\u00fcldenek, amelynek megad\u00e1sa meger\u0151s\u00edti a «test.com» domain f\u00f6l\u00f6tti jogosults\u00e1got \u00e9s lehet\u0151v\u00e9 teszi a TLS-tan\u00fas\u00edtv\u00e1ny megkap\u00e1s\u00e1t a «test.com» domainhez. <\/p>\n

A sebezhet\u0151s\u00e9g l\u00e9nyege, hogy a «test.com» domain mellett, amelyre a tan\u00fas\u00edtv\u00e1nyt k\u00e9rt\u00e9k, a jogosults\u00e1g-ellen\u0151rz\u00e9s jelz\u0151je a «example.com» domainre is \u00e9rv\u00e9nyes volt, amelyet az e-mailben haszn\u00e1ltak. A probl\u00e9m\u00e1t felt\u00e1r\u00f3 kutat\u00f3 bemutatta, hogy a TLS tan\u00fas\u00edtv\u00e1nyt megszerezhette az aliyun.com domainhez, amelyet a k\u00ednai Alibaba webmail szolg\u00e1ltat\u00e1s\u00e1ban alkalmaznak. A teszt t\u00e1mad\u00e1s sor\u00e1n a kutat\u00f3 regisztr\u00e1lta a «d2b4eee07de5efcb8598f0586cbf2690.test.dcv-inspector.com» ellen\u0151rz\u0151 domaint a «dcv-inspector.com» szolg\u00e1ltat\u00e1sn\u00e1l, \u00e9s TLS tan\u00fas\u00edtv\u00e1nyt k\u00e9rt, hozz\u00e1t\u00e9ve a DNS-rekordot: _validation-contactemail.d2b4eee07de5efcb8598f0586cbf2690.test.dcv-inspector.com DNS TXT myusername@aliyun.com <\/p>\n

Ezt k\u00f6vet\u0151en a kutat\u00f3 a SSL.com webhely\u00e9n TLS tan\u00fas\u00edtv\u00e1nyt k\u00e9rt a d2b4eee07de5efcb8598f0586cbf2690.test.dcv-inspector.com domainhez, \u00e9s az e-mailes meger\u0151s\u00edt\u00e9st v\u00e1lasztotta. Az SSL.com hiteles\u00edt\u0151 hat\u00f3s\u00e1g elk\u00fcldte a meger\u0151s\u00edt\u0151 k\u00f3dot a myusername@aliyun.com c\u00edmre, \u00e9s ennek megad\u00e1sa ut\u00e1n a meger\u0151s\u00edtett domainek list\u00e1j\u00e1hoz nemcsak a «d2b4eee07de5efcb8598f0586cbf2690.test.dcv-inspector.com» ker\u00fclt, hanem az «aliyun.com» is. Ezt k\u00f6vet\u0151en a kutat\u00f3 sikeresen megszerezte a TLS tan\u00fas\u00edtv\u00e1nyt az «aliyun.com» domainhez, amelynek a jogosults\u00e1g\u00e1t meger\u0151s\u00edtett\u00e9k. <\/p>\n

Az SSL.com hiteles\u00edt\u0151 k\u00f6zpont megoldotta a probl\u00e9m\u00e1t, \u00e9s 11 tan\u00fas\u00edtv\u00e1nyt azonos\u00edtott, amelyek kiad\u00e1s\u00e1n\u00e1l sebezhet\u0151, harmadik f\u00e9lt\u0151l sz\u00e1rmaz\u00f3 domain ellen\u0151rz\u00e9si s\u00e9m\u00e1t haszn\u00e1ltak az e-mailben. Felt\u00e9telezhet\u0151, hogy az azonos\u00edtott esetekben nincs rosszindulat\u00fa tev\u00e9kenys\u00e9gre utal\u00f3 nyom, \u00e9s az 11-b\u0151l eddig csak egy tan\u00fas\u00edtv\u00e1nyt vontak vissza, amelyet a kutat\u00f3 kapott az aliyun.com webhelyhez. A t\u00f6bbi tan\u00fas\u00edtv\u00e1ny a k\u00f6vetkez\u0151 domainekhez volt kapcsolva: medinet.ca, help.gurusoft.com.sg, banners.betvictor.com, production-boomi.3day.com, kisales.com \u00e9s medc.kisales.com. Az SSL.com v\u00e1llalat a k\u00f6zelj\u00f6v\u0151ben, legk\u00e9s\u0151bb m\u00e1jus 2-ig tervezi k\u00f6zz\u00e9tenni az esem\u00e9nyr\u0151l sz\u00f3l\u00f3 jelent\u00e9st.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0435\u043c \u0446\u0435\u043d\u0442\u0440\u0435 SSL.com \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u043b\u0430\u0434\u0435\u043d\u0438\u044f \u0434\u043e\u043c\u0435\u043d\u043e\u043c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0432\u0448\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c TLS-\u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442 \u0434\u043b\u044f \u043b\u044e\u0431\u043e\u0433\u043e \u0434\u043e\u043c\u0435\u043d\u0430, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u0438\u0432\u0448\u0435\u0433\u043e email \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443. \u0414\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f 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