A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
Bind could incorrectly enable recursion.
- bind9: Internet Domain Name Server
Andrew Skalski discovered that Bind could incorrectly enable recursion
when the "allow-recursion" setting wasn't specified. This issue could
improperly permit recursion to all clients, contrary to expectations.
The problem can be corrected by updating your system to the following
Ubuntu 18.04 LTS:
In general, a standard system update will make all the necessary changes.