BIND Dynamic Update DoS

• Summary: BIND denial of service (server crash) caused by receipt of a specific remote dynamic update message
• Versions affected: BIND 9, all versions
• This vulnerability affects all BIND servers which serve at least one DNS zone authoritatively, as a
  master, even if dynamic updates are not enabled.
• Exploitable: remotely (An active remote exploit is in wide circulation at this time. Please upgrade immediately!

ISC Announcement: https://www.isc.org/node/474