Amplification Attack Vulnerability in PowerDNS Recursor by PowerDNS

CVE-2020-10995

What is CVE-2020-10995?

PowerDNS Recursor versions 4.1.0 to 4.3.0 are susceptible to amplification attacks due to inadequate defenses against the DNS protocol vulnerabilities. Attackers can exploit these recursive DNS services to redirect traffic to third-party authoritative name servers, significantly amplifying the volume of the attack and degrading the performance of both recursive and authoritative services. Random subdomains can trigger the issue in NS records, increasing the potential for service disruption. Mitigations have been implemented in versions 4.1.16, 4.2.2, and 4.3.1 to address the impact of this vulnerability.

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