DNRD (aka Domain Name Relay Daemon) 2.20.3 forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1. This leads to disabling of DNSSEC protection provided by upstream resolvers.Referenceshttps://www.usenix.org/conference/usenixsecurity22/presentation/jeitnerhttp://dnrd.sourceforge.net/https://www.openwall.com/lists/oss-security/2022/08/14/1
