Thank you for taking the time to report this bug and helping to make Ubuntu better.
Since this bug affects a non-default configuration of bind, there are alternatives (such as AppArmor and running in a container) and OpenVZ is not part of Ubuntu, I'm setting the importance of this bug to Low. I don't expect anyone on the Ubuntu Server Team to work on this bug, but if someone else wants to provide a fix, please do.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
Since this bug affects a non-default configuration of bind, there are alternatives (such as AppArmor and running in a container) and OpenVZ is not part of Ubuntu, I'm setting the importance of this bug to Low. I don't expect anyone on the Ubuntu Server Team to work on this bug, but if someone else wants to provide a fix, please do.