What is DNS Spoofing? | UpGuard

This report explains DNS spoofing (cache poisoning), detailing how DNS and resolvers operate, how attackers forge responses via UDP-based weaknesses (e.g., MITM or DNS server compromise), and the conditions that enable successful attacks (uncached queries, port/request ID prediction, and target nameservers). It outlines impacts such as credential theft, phishing, and malware installation, and recommends mitigations including DNSSEC (RRSIG, DNSKEY, NSEC/NSEC3, chain of trust), active DNS monitoring, timely patching, port randomization and secure transaction IDs, strong authentication for DNS management, and user security awareness.