Oracle Corp. has shipped a new version of its Java software that nixes a feature in Java that hackers have been using to foist malicious software. Java 6 Update 20 was released sometime in the last 24 hours, and includes some security fixes. The update removes a feature that has been used to run malicious programs within PDF files. Both Foxit Reader and Adobe Reader now warn users if a PDF file tries to invoke this feature, and the alert box will look similar to the one pictured above.”]
Source: https://krebsonsecurity.com/2010/04/java-patch-targets-latest-attacks/