Multiple unspecified vulnerabilities in Sun Java Runtime Environment (JRE) in JDK and JRE 6 before Update 7, JDK and JRE 5.0 before Update 16, SDK and JRE 1.4.x before 1.4.2_18, and SDK and JRE 1.3.x before 1.3.1_23 allow remote attackers to violate the security model for an applet's outbound connections by connecting to localhost services running on the machine that loaded the applet.