[USN-3339-2] OpenVPN vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3339-2
August 07, 2017

openvpn vulnerability
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in OpenVPN.

Software Description:
- openvpn: virtual private network software

Details:

USN-3339-1 fixed several issues in OpenVPN. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Guido Vranken discovered that OpenVPN incorrectly handled an HTTP
 proxy with NTLM authentication. A remote attacker could use this issue
 to cause OpenVPN clients to crash, resulting in a denial of service,
 or possibly expose sensitive memory contents. (CVE-2017-7520)

Update instructions:

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

Ubuntu 12.04 ESM:
  openvpn                         2.2.1-8ubuntu1.5

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

References:
  https://www.ubuntu.com/usn/usn-3339-2
  https://www.ubuntu.com/usn/usn-3339-1
  CVE-2017-7520
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