Cache poisoning is a type of attack in which corrupt data is inserted into the cache database of the Domain Name System (DNS) name server. The Domain Name System is a system that associates domain names with IP addresses.
Devices that connect to the internet or other private networks rely on the DNS for resolving URLs, email addresses and other human-readable domain names into their corresponding IP addresses. In a DNS cache poisoning attack, a malicious party sends forged responses from an imposter DNS in order to reroute a domain name to a new IP address. This new IP address is almost always for a server that is controlled by the attacker. Cache poisoning attacks are often used to spread computer worms and other malware. [veracode.com/security/cache-poisoning]
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