STIGQter: STIG Summary: VMware vSphere 6.7 Virtual Machine Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 09 Mar 2021:

Console access through the VNC protocol must be disabled on the virtual machine.

DISA Rule

SV-239345r679584_rule

Vulnerability Number

V-239345

Group Title

SRG-OS-000480-VMM-002000

Rule Version

VMCH-67-000014

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

From the vSphere Web Client right-click the Virtual Machine and go to Edit Settings >> VM Options >> Advanced >> Configuration Parameters >> Edit Configuration. Find the RemoteDisplay.vnc.enabled value and set it to false. If the setting does not exist, add the Name and Value setting at the bottom of screen.

Note: The VM must be powered off to configure the advanced settings through the vSphere Web Client so it is recommended to configure these settings with PowerCLI as it can be done while the VM is powered on. Settings do not take effect via either method until the virtual machine is cold started, not rebooted.

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

Check Contents

From the vSphere Web Client right-click the Virtual Machine and go to Edit Settings >> VM Options >> Advanced >> Configuration Parameters >> Edit Configuration. Verify the RemoteDisplay.vnc.enabled value is set to false.

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.

Vulnerability Number

V-239345

Documentable

False

Rule Version

VMCH-67-000014

Severity Override Guidance

From the vSphere Web Client right-click the Virtual Machine and go to Edit Settings >> VM Options >> Advanced >> Configuration Parameters >> Edit Configuration. Verify the RemoteDisplay.vnc.enabled value is set to false.

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 Content Reference

M

Target Key

5327

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