This indicates an attack attempt to exploit a Security Bypass Vulnerability in HP ProCurve Manager SNAC.
The vulnerability is due to an design flaw when the vulnerable system handles a request for GetDomainControllerServlet class. A remote attacker can exploit this to bypass security checks of vulnerable system, via a crafted HTTP request.
HP Identity Driven Manager 4.0
HP ProCurve Manager 3.20
HP ProCurve Manager 4.0
HP ProCurve Manager Plus 3.20
HP ProCurve Manager Plus 4.0
Security Bypass: Remote attackers can bypass security checks of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.