CVE-2023-50868: The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155
when RFC 9276 guidance is skipped) allows remote attackers to cause
a denial of service (CPU consumption for SHA-1 computations) via
DNSSEC responses in a random subdomain attack, aka the "NSEC3"
issue. The RFC 5155 specification implies that an algorithm must
perform thousands of iterations of a hash function in certain
situations.
CVE-2023-50387: Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035,
6840, and related RFCs) allow remote attackers to cause a denial
of service (CPU consumption) via one or more DNSSEC responses, aka
the "KeyTrap" issue. One of the concerns is that, when
there is a zone with many DNSKEY and RRSIG records, the protocol
specification implies that an algorithm must evaluate all combinations
of DNSKEY and RRSIG records.