An issue has been found in PowerDNS Authoritative Server before 4.3.1 where an authorized user with the ability to insert crafted records into a zone might be able to leak the content of uninitialized memory.
https://security.gentoo.org/glsa/202012-18
https://github.com/PowerDNS/pdns
https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2020-05.html