Java Web Start in Sun JDK and JRE 5.0 Update 12 and earlier, and SDK and JRE 1.4.2_15 and earlier, on Windows does not properly enforce access restrictions for untrusted applications, which allows user-assisted remote attackers to read local files via an untrusted application.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.