During the week of February 17, a vulnerability was identified in iOS 7 and also in OS-X version 10.9.1 that could allow SSL connections to be captured or modified.
Apple provided a fix to both iOS 7 and iOS 6 systems on February 21. Details are available from
http://support.apple.com/kb/HT6147 (iOS 7)
http://support.apple.com/kb/HT6146 (iOS 6)
As of February 25, Apple has provided an update to OS-X version 10.9.1. Details are available at – http://support.apple.com/kb/HT6150
The software update can be downloaded using the Software Update function or from the Apple Support website at http://support.apple.com/downloads/