Created attachment 1428321 [details]
Patch from upstream
Description of problem:
For DNSSEC to be secure, dynamically modified zones must be kept separate from zones with static content. That requires the _acme-challenge name to be in its own, separate, dynamic zone. This is supported by the ACME protocol, but certbot 0.22.x or lower has a bug in this area.
THIS IS FIXED UPSTREAM IN CERTBOT 0.23.
The patch from the upstream repo (attached) can also be applied separately to the 0.22 codebase.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Set up a DNS structure with _acme-challenge as a separate modified zone
2. Try to configure it with certbot
Considering that we have shipped certbot 0.23.0, is this necessary?
If python3-certbot-dns-rfc2136 has also been upgraded to 0.23.0 or higher (looks like 0.24.0 is in Fedora 27+ now), then no, this is resolved.