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Ubuntu Security Notice USN-2484-1
January 26, 2015

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS

Summary:

Unbound could be made to consume resources if it received specially crafted
network traffic.

Software Description:
- unbound: validating, recursive, caching DNS resolver

Details:

Florian Maury discovered that Unbound incorrectly handled delegation. A
remote attacker could possibly use this issue to cause Unbound to consume
resources, resulting in a denial of service.

Update instructions:

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

Ubuntu 14.10:
  libunbound2                     1.4.22-1ubuntu4.14.10.1
  unbound                         1.4.22-1ubuntu4.14.10.1

Ubuntu 14.04 LTS:
  libunbound2                     1.4.22-1ubuntu4.14.04.1
  unbound                         1.4.22-1ubuntu4.14.04.1

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

References:
  http://www.ubuntu.com/usn/usn-2484-1
  CVE-2014-8602

Package Information:
  https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.10.1
  https://launchpad.net/ubuntu/+source/unbound/1.4.22-1ubuntu4.14.04.1