DNS cache poisoning dupes the resolver into believing that the “pirate” server is an authoritative server in place of the original server. These attacks capture and divert queries to another website unbeknownst to users, the danger being that users might divulge personal data on what they believe to be a bona fide site. The “Kaminsky flaw” discovered during the summer of 2008 is one such attack that poisons DNS resolvers
DNS cache poisoning attack attempts to spoof recursive DNS server. The attacker tries to make DNS server accept and cache malicious DNS data.