Apple claims that most OS X users are not affected by the Bash vulnerability

  During the course of yesterday, a multitude of warnings appeared on the Internet in connection with a vulnerability existing in OS X si Linux, allowing hackers to gain remote access to victims' computers without them knowing. Vulnerability exists in Bash, a UNIX system through which commands for OS X can be run directly from the application Port, Apple's OS X operating system also being affected to a certain extent.

The vast majority of OS X users are not at risk to recently reported bash vulnerabilities. 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.

  Asked what steps Apple will take to solve the problem announced that most users of the OS X platform are not affected by this vulnerability and that in the next period an update will be released for those who are. No one knows yet when Apple will release this update, but the vulnerability has been described as more dangerous than the one called Heartbleed and discovered many months ago.