{"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\/en\/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 security researcher from Seralys discovered a vulnerability that allowed for the replacement of the DNS server for the domain mastercard.com, which is used in the MasterCard payment system infrastructure. Since June 2020, there has been a typo in the DNS server list of the mastercard.com domain zone \u2014 instead of the host 'a22-65.akam.net' (Akamai DNS service), the host 'a22-65.akam.ne' was indicated. The root zone '.ne' is allocated to the Republic of Niger, and the domain 'akam.ne' was made available for purchase. <\/p>\n

Thus, for four and a half years, anyone could buy a domain name<\/a> 'akam.ne', create the host 'a22-65.akam.ne', deploy a DNS server on it, establish a custom version of the dns zone for mastercard.com, and redirect any subdomain of mastercard.com to your server. DNSSEC was not used for mastercard.com. Since the typo was made in the name of one of the five DNS servers, a successful attack could have potentially given control over at least 1\/5 of the traffic. The reach could be increased by setting a large TTL (Time To Live) for the spoofed zone, which would lead to longer retention of records in the caches of public resolvers, such as those maintained by Cloudflare (1.1.1.1) and Google (8.8.8.8).

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

In addition to intercepting traffic from existing hosts, a less noticeable attack could be conducted by using an originally absent subdomain for phishing, for example, creating the host 'redemtion.mastercard.com' and using it in spam instead of the legitimate entry point 'redemption.mastercard.com'. Furthermore, having control over one of the DNS servers servicing the domain mastercard.com would provide access to TLS certificate<\/a> services that allow domain ownership verification through Web or DNS, such as Let's Encrypt. Among the possible attack scenarios, there is also mention of creating a spoofed mail server to intercept correspondence from email name@mastercard.com and organizing the interception of authentication data from the computers of employees using Windows. <\/p>\n

The researcher who identified the issues purchased the domain «akam.ne» for $300 and launched a DNS sniffer to assess the volume of traffic. Analyzing the queries revealed that the incident with MasterCard wasn't isolated, and there are other domains on the list of DNS servers that specify the host «akam.ne» instead of «akam.net». Furthermore, it was found that from 2015 to 2018, the domain «akam.ne» was registered and likely used for conducting attacks. The assumption of attacks was made as the former owner of «akam.ne» also registered the domain «awsdns-06.ne», which is styled to resemble the DNS server «awsdns-06.net». The malfunction of one of the DNS servers due to a typo in its name may go unnoticed by administrators for a long time, as redundancy is maintained by specifying multiple DNS servers. <\/p>\n

MasterCard initially ignored the report about the issue, but after being contacted by journalist Brian Krebs, it acknowledged and fixed the error, stating that it did not pose a threat to infrastructure. Following this, through the Bugcrowd platform, which allows for rewards for identifying vulnerabilities, the researcher was redirected to a request from MasterCard to remove the published note about the incident. <\/p>\n

In response, the researcher stated that although he has an account with Bugcrowd, he did not submit any reward claims and directly notified MasterCard about the issue. The note was published to draw attention to the problem after MasterCard was no longer at risk and the domain «akam.ne» belonged to the researcher. Ultimately, MasterCard not only failed to reimburse the $300 spent on the domain but did not even verbally thank the researcher. <\/p>\n

Regarding the claim that the error did not pose additional risks, the researcher provided statistics on the received DNS requests, which included domains *.az.mastercard.com, indicating operational components of MasterCard's infrastructure hosted on Microsoft's Azure cloud service. The compromise of such components apparently posed a critical security threat.

\"Due<\/center>
\n
Source: 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 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