Sun has released updates including fixes for several security vulnerabilities that affect the Sun Java Runtime Environment.
Full release notes at:
http://java.sun.com/javase/6/webnotes/6u17.html
The latest Version 6 Update 17 can be downloaded at:
http://www.java.com/en/download/
It is advisable to remove older versions of Java to remove the threat exposure. Uninstall details at:
http://www.java.com/en/download/help/5000010800.xml