Unspecified vulnerability in vmci.sys in the Virtual Machine Communication Interface (VMCI) in VMware Workstation 6.5.1 and earlier, VMware Player 2.5.1 and earlier, VMware ACE 2.5.1 and earlier, and VMware Server 2.0.x before 2.0.1 build 156745 allows local users to gain privileges via unknown vectors.
VMware GSX Server 2.5.1 build 4968 and earlier, and Workstation 4.0 and earlier, allows local users to gain root privileges via certain enivronment variables that are used when launching a virtual machine session.