The Internet Systems Consortium has released a security advisory involving ISC BIND nameserver.  Per the advisory,  a specially crafted DNS query could cause the DNS service to terminate leading to a Denial of Service.  This security issue can be exploited remotely and has been seen in the wild by multiple ISC customers.  It is recommended that DNS server administrators utilizing ISC Bind upgrate to the newest patched release.  More information  is available at https://kb.isc.org/article/AA-01015