Another round of software update is here and this time it’s Apple releasing patching to guard against Shellsock exploits. 

Apple has pushed out an update entitled OS X bash Update 1.0,  coming in three flavours: one for OS X Mavericks, one for Mountain Lion, and one for Lion. 

So far, at least [2014-09-29T23:55Z], it is not available via the Software Update option in the Apple menu, so you will have to get it yourself:

• DL1767 – OS X Lion
• DL1768 – OS X Mountain Lion
• DL1769 – OS X Mavericks

When you’ve done the download, you’ll have a DMG (disk image) file called BashUpdateXxxx.dmg, where Xxxx is your operating system name, e.g.Mavericks:

Open the DMG and you will find a .pkg (installation package) file:

Double click it, give it an administrator password so it can change key system files, and you are done.

You can check that the update worked by opening a Terminal window and issuing the bash -version command: