The system must disable console access through the VNC protocol.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-64105	VMCH-06-000034	SV-78595r1_rule		Medium

Description
The VM console enables you to connect to the console of a virtual machine, in effect seeing what a monitor on a physical server would show. This console is also available via the Virtual Network Computing (VNC) protocol and should be disabled.

STIG	Date
VMware vSphere Virtual Machine Version 6 Security Technical Implementation Guide	2015-12-09

Details

Check Text ( C-64855r1_chk )
From the vSphere Client select the Virtual Machine right click and go to Edit Settings >> VM Options Tab >> Advanced >> Configuration Parameters. Find the RemoteDisplay.vnc.enabled value and verify it is set to false. Note: The VM must be powered off to view the advanced settings through the vSphere Client so it is recommended to view these settings with PowerCLI as it can be done while the VM is powered on. or From a PowerCLI command prompt while connected to the ESXi host or vCenter server run the following command: Get-VM "VM Name" \| Get-AdvancedSetting -Name RemoteDisplay.vnc.enabled If the virtual machine advanced setting RemoteDisplay.vnc.enabled does not exist or is not set to false, this is a finding.

Check Text ( C-64855r1_chk )

From the vSphere Client select the Virtual Machine right click and go to Edit Settings >> VM Options Tab >> Advanced >> Configuration Parameters. Find the RemoteDisplay.vnc.enabled value and verify it is set to false.

Note: The VM must be powered off to view the advanced settings through the vSphere Client so it is recommended to view these settings with PowerCLI as it can be done while the VM is powered on.

or

From a PowerCLI command prompt while connected to the ESXi host or vCenter server run the following command:

Get-VM "VM Name" | Get-AdvancedSetting -Name RemoteDisplay.vnc.enabled

If the virtual machine advanced setting RemoteDisplay.vnc.enabled does not exist or is not set to false, this is a finding.

Fix Text (F-70033r1_fix)
From the vSphere Client select the Virtual Machine right click and go to Edit Settings >> VM Options Tab >> Advanced >> Configuration Parameters. Find the RemoteDisplay.vnc.enabled value and set it to false. If the setting does not exist click "Add Row" to add the setting to the virtual machine. Note: The VM must be powered off to configure the advanced settings through the vSphere Client so it is recommended to configure these settings with PowerCLI as it can be done while the VM is powered on. or From a PowerCLI command prompt while connected to the ESXi host or vCenter server run the following command: If the setting does not exist run: Get-VM "VM Name" \| New-AdvancedSetting -Name RemoteDisplay.vnc.enabled -Value false If the setting exists run: Get-VM "VM Name" \| Get-AdvancedSetting -Name RemoteDisplay.vnc.enabled \| Set-AdvancedSetting -Value false

Fix Text (F-70033r1_fix)

From the vSphere Client select the Virtual Machine right click and go to Edit Settings >> VM Options Tab >> Advanced >> Configuration Parameters. Find the RemoteDisplay.vnc.enabled value and set it to false. If the setting does not exist click "Add Row" to add the setting to the virtual machine.

Note: The VM must be powered off to configure the advanced settings through the vSphere Client so it is recommended to configure these settings with PowerCLI as it can be done while the VM is powered on.

or

From a PowerCLI command prompt while connected to the ESXi host or vCenter server run the following command:

If the setting does not exist run:

Get-VM "VM Name" | New-AdvancedSetting -Name RemoteDisplay.vnc.enabled -Value false

If the setting exists run:

Get-VM "VM Name" | Get-AdvancedSetting -Name RemoteDisplay.vnc.enabled | Set-AdvancedSetting -Value false