=========================================================================Ubuntu Security Notice USN-1518-1
July 26, 2012

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

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

Software Description:
- bind9: Internet Domain Name Server

Details:

Einar Lonn discovered that Bind incorrectly initialized the failing-query
cache. 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 12.04 LTS:
  libdns81                        1:9.8.1.dfsg.P1-4ubuntu0.2

Ubuntu 11.10:
  libdns69                        1:9.7.3.dfsg-1ubuntu4.3

Ubuntu 11.04:
  libdns69                        1:9.7.3.dfsg-1ubuntu2.5

Ubuntu 10.04 LTS:
  libdns64                        1:9.7.0.dfsg.P1-1ubuntu0.6

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

References:
  https://ubuntu.com/security/notices/USN-1518-1
  CVE-2012-3817

Package Information:
  https://launchpad.net/ubuntu/+source/bind9/1:9.8.1.dfsg.P1-4ubuntu0.2
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu4.3
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu2.5
  https://launchpad.net/ubuntu/+source/bind9/1:9.7.0.dfsg.P1-1ubuntu0.6