=========================================================================Ubuntu Security Notice USN-1264-1
November 16, 2011

bind9 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

Bind could be made to crash if it received specially crafted network
traffic.

Software Description:
- bind9: Internet Domain Name Server

Details:

It was discovered that Bind incorrectly handled certain specially crafted
packets. A remote attacker could use this flaw to cause Bind to crash,
resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 11.10:
  libdns69                        1:9.7.3.dfsg-1ubuntu4.1

Ubuntu 11.04:
  libdns69                        1:9.7.3.dfsg-1ubuntu2.3

Ubuntu 10.10:
  libdns66                        1:9.7.1.dfsg.P2-2ubuntu0.5

Ubuntu 10.04 LTS:
  libdns64                        1:9.7.0.dfsg.P1-1ubuntu0.4

Ubuntu 8.04 LTS:
  libdns36                        1:9.4.2.dfsg.P2-2ubuntu0.9

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-1264-1
  CVE-2011-4313

Package Information:
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu4.1
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.1.dfsg.P2-2ubuntu0.5
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.0.dfsg.P1-1ubuntu0.4
  https://launchpad.net/ubuntu/+source/bind9/1:9.4.2.dfsg.P2-2ubuntu0.9