Apple says the vast majority of Mac computer users are not at risk from the ” Shellshock ” bug that could allow hackers to take over an operating system completely. Apple has issued a public statement in response to this issue, assuring its OS X users that most of them are safe from any potential attacks through the ShellShock Vulnerability. The Bash glitch has been described as more worse than the Heartbleed security flaw, discovered in April, that left all information stored on data servers potentially vulnerable to hackers.
Source: https://thehackernews.com/2014/09/apple-most-mac-os-x-users-not_26.html