A lot of security and other audits have been performed against it though; MaraDNS, after all, is notable enough to have a Wikipedia page and hundreds of GitHUB stars.

For example, when the Ghost Domain Name DNS vulnerability was discussed, MaraDNS was audited and named (MaraDNS was immune to the security bug, for the record)

https://web.archive.org/web/20120304054959/https://www.isc.o...