The vSphere API in VMware ESXi 4.1 and ESX 4.1 allows remote attackers to cause a denial of service (host daemon crash) via an invalid value in a (1) RetrieveProp or (2) RetrievePropEx SOAP request.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.