A wave of DNS spoofing attacks occurred in the spring of 2020 during the COVID-19 pandemic. Even temporary fake DNS responses may remain in the cache and can cause damage over a longer time. May pose a persistent threat: If a malicious DNS server is set up on the system, communication will be compromised from this point on.Collection of comprehensive user profiles: Personal data is collected in the process and then sold or used for additional targeted spear phishing attacks.This opens the door to further attacks and extensive espionage. System malware infection: The victim is tricked into installing malware on their own system. These methods are often used to hack into computer systems or for various scams. Confidential data theft: Spear phishing and pharming attacks are used to steal sensitive data such as passwords.Whether the victim is accessing a website or sending an email: if the IP address of the server in question is spoofed, an attacker can access their data.ĭNS spoofing poses the following risks in particular: In other words, DNS spoofing can affect every single connection established by the client. Nearly every connection uses it for name resolution. The DNS is a fundamentally useful technology. This page may play advertisements or create user profiles to then sell at a profit. Internet service providers use DNS hijacking to redirect the user to a specific page when they enter non-existent or misspelled domains. redirecting the user to a different page when accessing certain domains) to collect user data for advertising purposes. However, these restrictions can be circumvented with minimal effort by using an uncensored DNS server. If a user tries to access a blocked domain, they will be redirected to a warning page instead. In many countries, this is done to prevent users from accessing file-sharing or porn domains. Therefore, every DNS request is under the control of the internet service provider.įor example, internet service providers can purposely rig their DNS tables to implement state censorship requirements. This is normally preconfigured in the local router. Most people are unaware that they are using a DNS server belonging to their internet service provider.
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