Apple has, however, apparently already moved quickly to address
the issue, disabling the Java 7 plug-in on Macs where it is
already installed. Apple has achieved this by updating its
“Xprotect.plist” blacklist to require a minimum of an as-yet
unreleased 1.7.0_10-b19 version of Java 7. With the current
publicly-available version of Java 7 being 1.7.0_10-b18, all
systems running Java 7 are failing to pass the check initiated
through the anti-malware system built into OS X.
Most recent Macs probably don’t even have Java installed, but it’s pretty clever that Apple can blacklist vulnerable versions remotely.