This indicates a possible attempt to exploit an integer overflow vulnerability in the InitialDirContext in Java Runtime Environment (JRE) that may allow remote attackers to cause a denial of service (Java exception and failed DNS requests) via a large number of DNS requests.
Sun Java 2 Runtime Environment 1.5
Sun Java 2 Runtime Environment 1.4.2_03
Sun Java 2 Runtime Environment 1.4.2
Denial of service
Currently we are not aware of any vendor-supplied patches for this issue.