Java security threats: What you need to know
First, the bad news. Once again, Mac users are at risk due to a flaw in Java, similar to the one that enabled the Flashback Trojan. Even worse, there isn't (yet) a patch to fix that vulnerability. But don't worry: This time around, there's good news for Mac users: Thanks to changes Apple has made, most of us are likely to be safe from this threat.
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Story added 31. August 2012, content source with full text you can find at link above.