More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2298904 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Dhcp is not affected by this flaw. Dhcp ships bundled bind libs but it uses ddns and config routines out of it only.