Terminal show that this patch changes the GNU bash, version 3.2.51(1)-release (x86_64-apple-darwin13)
Copyright (C) 2007 Free Software Foundation, Inc.
to:
GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin13)
Copyright (C) 2007 Free Software Foundation, Inc.
and I had read that bash was vulnerable up to 4.3 so I'm not so sure this is fully the cure as very little is provided at Apple support pages regarding this patch nor issue except boilerplate text as follows:
This update fixes a security flaw in the bash UNIX shell.
For more information on the security content of this update, see http://support.apple.com/kb/HT1222
which states:
Apple security updates
This document outlines security updates for Apple products.
For the protection of our customers, Apple does not disclose, discuss or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.