US-CERT CIIN-09-023-01 (U//FOUO) describes a DNS amplification attack
due to misconfigured DNS Servers. Several attacks have been
orchestrated over the past weeks bringing this issue to light.
A DNS server that is vulnerable to this attack will respond to a root NS
query (".") by returning the list of root servers.
This vulnerable DNS server could then be used in a denial of service
attack against another entity.