knot-resolver vulnerabilities

Vladimír Čunát discovered that Knot Resolver incorrectly handled input
during DNSSEC validation. A remote attacker could possibly use this issue
to bypass certain validations. (CVE-2019-10190)

Vladimír Čunát discovered that Knot Resolver incorrectly handled input
during DNSSEC validation. A remote attacker could possibly use this issue
to downgrade DNSSEC-secure domains to a DNSSEC-insecure state, resulting
in a domain hijacking attack. (CVE-2019-10191)

Vladimír Čunát discovered that Knot Resolver incorrectly handled certain
DNS replies with many resource records. An attacker could possibly use
this issue to consume system resources, resulting in a denial of service.
(CVE-2019-19331)

Lior Shafir, Yehuda Afek, and Anat Bremler-Barr discovered that Knot
Resolver incorrectly handled certain queries. A remote attacker could
use this issue to perform an amplification attack directed at a target.
(CVE-2020-12667)