THis doesn't seem like something that can be cured with an update.
Hmmm....
http://techcrunch.com/2012/09/26/the-iphone-5s-camera-is-faulty-shows-a-purple-haze/
Hmmm....
http://techcrunch.com/2012/09/26/the-iphone-5s-camera-is-faulty-shows-a-purple-haze/