A security issue affects the following Ubuntu releases:
Ubuntu 10.10
This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.
The problem can be corrected by upgrading your system to the following package versions:
Ubuntu 10.10: libdns66 1:9.7.1.dfsg.P2-2ubuntu0.2
In general, a standard system update will make all the necessary changes.
Details follow:
It was discovered that Bind incorrectly handled IXFR transfers and dynamic updates while under heavy load when used as an authoritative server. A remote attacker could use this flaw to cause Bind to stop responding, resulting in a denial of service.