=========================================================================Ubuntu Security Notice USN-3421-1
September 18, 2017

libidn2-0 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04

Summary:

Libidn2 could be made to crash if it received specially crafted
input.

Software Description:
- libidn2-0: Internationalized domain names (IDNA2008) library

Details:

It was discovered that Libidn2 incorrectly handled certain input. A
remote attacker could possibly use this issue to cause Libidn2 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 17.04:
  idn2                            0.16-1ubuntu0.1
  libidn2-0                       0.16-1ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-3421-1
  CVE-2017-14062

Package Information:
  https://launchpad.net/ubuntu/+source/libidn2-0/0.16-1ubuntu0.1