Apple is aware of the recently discovered bash exploit, nicknamed Shellshock, and is working quickly to provide a software update for the OS X, the operating system that runs on the Mac.
Apple comments on 'Shellshock' exploit, working quickly to provide OS X softw...
For those of you that use X code, Mac server, or use an advanced setting of Unix, I came across this article this morning from TUAW for a patch of the bash bug, aka Shellshock. There is also a link in the article to see if your Mac has the Bash shell feature enabled to see if your vulnerable.