[alex34778]

As far as I can tell, this issue would be a problem where all of the following conditions are met:

1. Tenants are allowed to create arbitrary subdomains with arbitrary CNAME values 2. Tenants are not authorized to act on behalf of the TLD directly, only on their respective subdomain 3. Tenants are ostensibly prevented from TLD cert issuance by being explicitly blocked from creating subdomains that start with underscores

For most entities these conditions probably do not hold true anyway. But it could conceivably apply to certain free/dynamic dns providers, for example afraid.org and noip both allow arbitrary CNAMEs (though I checked my noip account and it wouldn't work anyway because of length limits on subdomains).

I would guess that in act fact there are very few entities in existence for which this actually represents a potential threat against them, since it requires a very specific delineation of zone authorizations, but there might be a few.

For most of Alegeus customers I doubt any of this applies, though, they're probably lucky to know their GoDaddy login to add any sort of DNS record, let alone have a whole system in place for less privileged users to create arbitrary CNAME records subject to controls over the use of underscores.