The Grinch security flaw poses a threat to Linux/Unix based servers.
No System Is Safe – Serious Security Flaw Hits Linux, OS X Systems
A serious flaw leaves computers running Linux and OS X vulnerable to attack. What you need to know about Shellshock. http://www.pcworld.com/article/2687857/bigger-than-heartbleed-shellshock-flaw-leaves-os-x-linux-more-open-to-attack.html