OS X users now have a security patch available to address the Shellshock security flaw that was discovered in recent weeks. The update, which is available on the Apple Support website, is available for OS X Mavericks, OS X Mountain Lion and OS X Lion. It is presumed that the issue is already addressed in OS X Yosemite or will be updated in a patch during its current beta cycle.
If you aren’t familiar with what the Shellshock security flaw is exactly, Apple provided the following statement to MacRumors last week on it.
Bash, a UNIX command shell and language included in OS X, has a weakness that could allow unauthorized users to remotely gain control of vulnerable systems. With OS X, systems are safe by default and not exposed to remote exploits of bash unless users configure advanced UNIX services. We are working to quickly provide a software update for our advanced UNIX users.
There are a couple of things to keep in mind on this flaw. First, you likely aren’t impacted so no need to panic at the disco. Second, even if you never use Terminal and the shell commands, you should update anyway. Better to be safe than sorry later.