USN-2368-1: OpenVPN vulnerability

2 October 2014

openvpn vulnerability

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

  • Ubuntu 12.04 LTS


OpenVPN could be made to expose sensitive information over the network.

Software Description

  • openvpn - virtual private network software


It was discovered that OpenVPN incorrectly handled HMAC comparisons when running in UDP mode. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could possibly be used to perform a plaintext recovery attack.

Update instructions

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

Ubuntu 12.04 LTS
openvpn - 2.2.1-8ubuntu1.3

To update your system, please follow these instructions:

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