Popcorn! Peanuts! Security updates! Get yer security updates!
Check out AppleCare Document: 120141 which will tell you that OpenSSL and "Security" will be updated and then go fire up Software Update and get secure. Reboot required.
The doc doesn't go into any detail on which, if any, vulnerability this update fixes. It would be nice to know so we could get a good measure of how quickly Apple is responding to alerts. Discuss