Knot Resolver Security Vulnerabilities - 2023

CVE-2023-26249

Knot Resolver before 5.6.0 enables attackers to consume its resources, launching amplification attacks and potentially causing a denial of service. Specifically, a single client query may lead to a hundred TCP connection attempts if a DNS server closes connections without providing a response.

CVE-2023-46317

Knot Resolver before 5.7.0 performs many TCP reconnections upon receiving certain nonsensical responses from servers.