source: https://www.securityfocus.com/bid/34150/info
Sun Java System Calendar Server is prone to a denial-of-service vulnerability because it fails to handle certain duplicate URI requests.
An attacker can exploit this issue to crash the Calendar Server, resulting in a denial-of-service condition.
NOTE: Versions prior to Sun Java System Calendar Server 6.3 are not vulnerable.
The following example data is available:
https://www.example.com:3443/?tzid=crash