Today, we released version 4.3.4 of the authoritative DNS nameserver NSD.
This release fixes CVE-2020-28935, this solves a problem where the pidfile is altered by a symlink, and fails if a symlink is encountered. See https://nlnetlabs.nl/downloads/nsd/CVE-2020-28935.txt for more information.
Also there are bug fixes and the syntax of the RR type ZONEMD can be used in zonefiles.
You can get source packages of this version from the downloads page.