This is a short (local) test of the bash bug, announced in September 2014. Check out the reference [vox.com] to learn more about the story behind the bug and its impact.
The machine runs Ubuntu Server 14.04 LTS.
The distribution bash package is on version 4.3.11(1).
The bug, showing an arbitrary execution during an environment variable definition.
After update, the version number does not change. However, behavior does: