Unspecified vulnerability in the DHCP service in VMware Workstation 5.5.x before 5.5.6, VMware Player 1.0.x before 1.0.6, VMware ACE 1.0.x before 1.0.5, VMware Server 1.0.x before 1.0.5, and VMware Fusion 1.1.x before 1.1.1 allows attackers to cause a denial of service.