You missed it? Don't worry. So did most people. Apple released an update to patch a few minor problems for iOS 8. Unfortunately, the update was a disaster. Those who installed it on iPhone 6 models suddenly found themselves unable to connect to the cellular network or WIFI and the Battery was draining rapidly. Most other devices were OK. OOPS! Apple pulled iOS 8.0.1 after it was available for only one hour and 14 minutes.
About 800,000 users applied iOS 8.0.1 before it was pulled and those with iPhone 6 and 6 Plus had to connect to a computer and restore their iPhones to iOS 8.0. A few people were in the middle of downloading and installing when it was abruptly pulled and also had to restore.
Two days later, Apple released iOS 8.0.2 which was fine. . . No problems so far.
Apple released the Bash patch, and it's the correct (i.e. final) one, clean with no warnings/errors.
http://arstechnica.com/apple/2014/09/apple-patches-shellshock-bash-bug-in-os-x-10-9-10-8-and-10-7/
These are the individual pages on Apple's upport site:
http://support.apple.com/kb/DL1767 OS X LionTakes about a minute to find and download, and about a minute to install and check.
http://support.apple.com/kb/DL1768 OS X Mountain Lion
http://support.apple.com/kb/DL1769 OS X Mavericks
I just updated my Mavericks 10.9.5 system, works fine.