Apple has released a security update for QuickTime 7.1.6, fixing two issues in the way the media player works on the Java platform. The most serious of these problems could give criminals a way of taking control of an unpatched computer, Apple said in a security alert: "By enticing a user to visit a Web page containing a maliciously crafted Java applet, an attacker can trigger the issue which may lead to arbitrary code execution." The second bug is considered to be less critical, but it could allow an attacker to have a look into the Web browser"s memory and lead to the disclosure of sensitive information, Apple said.