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DNS spoofing, also referred to as DNS cache poisoning, is a form of computer security hacking in which corrupt Domain Name System data is introduced into the DNS resolver's cache, causing the name server to return an incorrect result record, e.g. an IP address. This results in traffic being diverted to any computer that the attacker chooses.
DNS hijacking, DNS poisoning, or DNS redirection is the practice of subverting the resolution of Domain Name System (DNS) queries. [1] This can be achieved by malware that overrides a computer's TCP/IP configuration to point at a rogue DNS server under the control of an attacker, or through modifying the behaviour of a trusted DNS server so that it does not comply with internet standards.
Two common varieties are DNS cache poisoning [2] and ARP cache poisoning. Web cache poisoning involves the poisoning of web caches [3] (which has led to security issues in programming languages, including all Python versions at the time in 2021, and expedited security updates [4]). Attacks on other, more specific, caches also exist. [5] [6] [7]
[citation needed] Pharming can be conducted either by changing the hosts file on a victim's computer or by exploitation of a vulnerability in DNS server software. DNS servers are computers responsible for resolving Internet names into their real IP addresses. Compromised DNS servers are sometimes referred to as "poisoned". Pharming requires ...
DNSSEC was designed to protect applications using DNS from accepting forged or manipulated DNS data, such as that created by DNS cache poisoning. All answers from DNSSEC protected zones are digitally signed. [1]
Kaminsky was known among computer security experts for his work on DNS cache poisoning, for showing that the Sony rootkit had infected at least 568,000 computers, [4] and for his talks at the Black Hat Briefings. [3] On June 16, 2010, he was named by ICANN as one of the Trusted Community Representatives for the DNSSEC root. [5]
dnscache — the DNS resolver and cache. tinydns — a database-driven DNS server. walldns — a "reverse DNS wall", providing IP address-to-domain name lookup only. rbldns — a server designed for DNS blacklisting service. pickdns — a database-driven server that chooses from matching records depending on the requestor's location.
DNS rebinding is a method of manipulating resolution of domain names that is commonly used as a form of computer attack. In this attack, a malicious web page causes visitors to run a client-side script that attacks machines elsewhere on the network.