ubuntu

You can upgrade to the latest .deb on precise until utopic and get it fixed:

Run:
env x='() { :;}; echo vulnerable' bash -c 'echo hello' ;
apt-get update;
apt-get -y install bash;
env x='() { :;}; echo vulnerable' bash -c 'echo hello'

Detailed Proof of the Fix:

MariaDB is an amazing replacement for the previous mysql, abducted by their new "owners", Oracle.
MariaDB is in direct competition with Percona and they both fully support all applications that run with the old mysql backend.