Cache poisoning is a type of cyber attack that involves manipulating the data stored in a caching system, such as a DNS resolver cache, in order to redirect traffic to a malicious website.
In a typical cache poisoning attack, the attacker will send fake or malicious information to a caching system, tricking it into caching the incorrect data. Once the data has been cached, legitimate requests for that data will be redirected to the malicious website, instead of the intended destination. This can allow the attacker to steal sensitive information or execute other attacks.