A serious vulnerability exists in Java and Sun has known about this vulnerability since around April 9th. This exploit can occur because the Java Browser Plugin is running “javaws.exe” without validating command-line parameters. Last week, when confronted about the problem, Oracle said they did not consider this vulnerability to be of high enough priority to break their quarterly patch cycle.
A U.S.-based Web site, Songlyrices.com was compromised by attackers, and was redirecting visitors to a Russian server feeding the Java attack as well as other exploits.
Now that users have started reporting that they are being infected by the drive-by Java attacks, Oracle has changed its mind and issued a patch. If you haven’t already patched this vulnerability you can download Java software at http://www.java.com/en/download/index.jsp