CVE-2019-10191
A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Date published : 2019-07-16
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html