Apple issues Shellshock Bash bug patch for Mac OS X users

Graham Cluley
Graham Cluley
@[email protected]

Apple patchThe Shellshock bug in Bash being actively exploited online.

According to reports, malicious hackers are exploiting the flaw to spread malware, open backdoors, and launch denial-of-service attacks.

Which means that it’s important that vulnerable devices are patched as quickly as possible.

So it’s good to see that overnight Apple has rolled out what it is calling “OS X bash Update 1.0” for users of Mavericks, Mountain Lion and Lion.

OS X Bash update

The good news is that the vast majority of Apple’s Mac OS X users probably weren’t at risk from having their computers exploited by the Shellshock vulnerability because they wouldn’t have configured their systems in such a way as to allow the Bash shell to be accessed remotely. The better news is that Apple hasn’t used this as an excuse not to patch the bug regardless.

So, if you use Mac OS X, make sure you download and install the patch.

Sign up to our free newsletter.
Security news, advice, and tips.

If you’re not sure whether you are running a patched version of Bash on your Mac, here’s how you check.

Open the Terminal application (which you can either find via Spotlight search, or by navigating to the Applications / Utilities folder).

Find Terminal application in Spotlight

Enter the following command at the $ prompt:

bash -version

Bash updated

If you’ve done that correctly, you should be shown a version number for Bash.

On Mavericks, it should now say GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin13).

On Mountain Lion it should say GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin12).

And on Lion it should say GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin11).

Graham Cluley is an award-winning keynote speaker who has given presentations around the world about cybersecurity, hackers, and online privacy. A veteran of the computer security industry since the early 1990s, he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows, makes regular media appearances, and is the co-host of the popular "Smashing Security" podcast. Follow him on Twitter, Mastodon, Threads, Bluesky, or drop him an email.

5 comments on “Apple issues Shellshock Bash bug patch for Mac OS X users”

  1. Jim Goodyear

    Very Timely and Useful Bash/Mavericks info from you Graham.
    Needless to say Apple aren't as quick off the mark as you are, but the info you supplied enabled me to find and download the update; WITHOUT having to wait for Apple to tell me about it, if they ever did.
    Thanks again
    Jim Goodyear

  2. Sharon

    Here is a great Video on it

  3. onarock

    i run lion, and the update seems to be only for maverick….this is my bash version "version 3.2.48(1)-release" now what do i do?????


    1. onarock · in reply to onarock

      ok, thanx to your site, i found the lion link for the patch…..thanx so much….all is good


  4. Raymond Naseef

    For the Mavericks fix, open URL

    I also found this from

    If that does not work, open URL in their image above:


What do you think? Leave a comment

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.