V-256423

Discussion

If the organization is not using products that use the dvfilter network API, the host should not be configured to send network information to a virtual machine (VM). If the API is enabled, an attacker might attempt to connect a virtual machine to it, potentially providing access to the network of other VMs on the host. If using a product that makes use of this API, verify the host has been configured correctly. If not using such a product, ensure the setting is blank.

Check Content

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> System >> Advanced System Settings.

Select the "Net.DVFilterBindIpAddress" value and verify the value is blank or the correct IP address of a security appliance if in use.

or

From a PowerCLI command prompt while connected to the ESXi host, run the following command:

Get-VMHost | Get-AdvancedSetting -Name Net.DVFilterBindIpAddress

If the "Net.DVFilterBindIpAddress" is not blank and security appliances are not in use on the host, this is a finding.