August 6, 2010

DNS Cache Poisoning

DNS Cache Poisoning is a maliciously created or unintended situation that provides data to a caching name server that did not originate from authoritative Domain Name System (DNS) sources. This can happen through improper software design, mis-configuration of name servers, and maliciously designed scenarios exploiting the traditionally open-architecture of the DNS system. Once a DNS server has received such non-authentic data and caches it for future performance increase, it is considered poisoned, supplying the non-authentic data to the clients of the server.

A domain name server translates a domain name (such as into an IP Address that Internet hosts use to contact Internet resources. If a DNS server is poisoned, it may return an incorrect IP Address, diverting it.
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