=========================================================================Ubuntu Security Notice USN-3482-1
November 16, 2017

ipsec-tools vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

ipsec-tools could be made to crash if it received specially crafted
network traffic.

Software Description:
- ipsec-tools: IPsec tools for Linux

Details:

It was discovered that racoon, the ipsec-tools IKE daemon, incorrectly
handled certain ISAKMP fragments. A remote attacker could use this
issue to cause racoon 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:
  ipsec-tools                     1:0.8.0-9ubuntu1.2
  racoon                          1:0.8.0-9ubuntu1.2

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

References:
  https://ubuntu.com/security/notices/USN-3482-1
  CVE-2016-10396