=========================================================================Ubuntu Security Notice USN-2669-1
July 07, 2015

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

- Ubuntu 15.04
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- bind9: Internet Domain Name Server

Details:

Breno Silveira Soares discovered that Bind incorrectly handled certain
zone data when configured to perform DNSSEC validation. A remote attacker
could use this issue with specially crafted zone data 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 15.04:
  bind9                           1:9.9.5.dfsg-9ubuntu0.1

Ubuntu 14.10:
  bind9                           1:9.9.5.dfsg-4.3ubuntu0.3

Ubuntu 14.04 LTS:
  bind9                           1:9.9.5.dfsg-3ubuntu0.3

Ubuntu 12.04 LTS:
  bind9                           1:9.8.1.dfsg.P1-4ubuntu0.11

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

References:
  https://ubuntu.com/security/notices/USN-2669-1
  CVE-2015-4620

Package Information:
  https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-9ubuntu0.1
  https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-4.3ubuntu0.3
  https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.3
  https://launchpad.net/ubuntu/+source/bind9/1:9.8.1.dfsg.P1-4ubuntu0.11