Multiple unspecified vulnerabilities in Sun Java Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 7 and earlier, and Java System Development Kit (SDK) and JRE 1.4.2_12 and earlier 1.4.x versions, allow attackers to develop Java applets or applications that are able to gain privileges, related to serialization in JRE.

The Java Plug-in J2SE 1.3.0_02 through 5.0 Update 5, and Java Web Start 1.0 through 1.2 and J2SE 1.4.2 through 5.0 Update 5, allows remote attackers to exploit vulnerabilities by specifying a JRE version that contain vulnerabilities.