Domain Name System (DNS):53

Security Weaknesses

• Vulnerable to DNS spoofing and cache poisoning attacks.

• DNS amplification can be exploited for DDoS attacks.

• Lacks built-in authentication and encryption.

Security Defense and Mitigation Measures

• Implement DNSSEC to validate DNS responses.

• Monitor and restrict DNS traffic using rate limiting.

• Harden DNS servers against known vulnerabilities.

Indicators of Compromise or Attack

• Unexpected DNS resolutions or traffic anomalies.

• Large DNS responses indicating possible amplification attacks.

• Unusual queries or changes to DNS records.