Update: Mavericks users can now update to 10.9.2 which fixes the flaw. 🙂
News is just breaking of a flaw in Apple’s implementation of SSL security, which could affect anyone using iOS and 10.9 OSX over public/open access wifi ‘hotspots’.
If you’re using iOS, please ensure you do Software Update immediately as a patch has already been released by Apple.
No word from Apple on OS X at time of writing. You can test to see if you have the problem by clicking the following link. Basically, if SSL is working properly you shouldn’t be able to read the message on this page:
If you can read the message on that website from your Mac computer, the best advice to date is to stay off public/open access wifi networks until we hear something more from Apple.
Ars Technica have more information on the security flaw here.