[USN-3535-2] Bind vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3535-2
January 17, 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-3535-1 fixed a vulnerability in Bind. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Jayachandran Palanisamy discovered that the Bind resolver incorrectly
 handled fetch cleanup sequencing. A remote attacker could possibly 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.P1-4ubuntu0.24

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

References:
  https://www.ubuntu.com/usn/usn-3535-2
  https://www.ubuntu.com/usn/usn-3535-1
  CVE-2017-3145
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