=========================================================================Ubuntu Security Notice USN-3769-2
October 01, 2018

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

- Ubuntu 12.04 ESM

Summary:

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

Software Description:
- bind9: Internet Domain Name Server

Details:

USN-3769-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Bind incorrectly handled the deny-answer- aliases feature. If this feature is enabled, a remote attacker could
 use this issue 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 ESM:
  bind9                           1:9.8.1.dfsg.P1-4ubuntu0.26

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

References:
  https://ubuntu.com/security/notices/USN-3769-2
  https://ubuntu.com/security/notices/USN-3769-1
  CVE-2018-5740