Klaus1 wrote:
Unless you are running OS 10.9.5 you are not affected.
Sorry, but that's simply not true. The vulnerability has existed in bash for years, but just discovered recently. I just tested a system running 10.6.8 and it is vulnerable. There's an easy test outlined in the article you mentioned to see whether your system is vulnerable or not.
Hopefully Apple releases an update soon. For any system administrators with web servers running some variation of Unix/Linux, I would suggest patching as soon as possible. The following article has some information on patching Linux near the bottom of the page:
http://www.symantec.com/connect/blogs/shellshock-all-you-need-know-about-bash-bu g-vulnerability