STIGQter: STIG Summary: VMware vSphere 7.0 ESXi Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 02 Apr 2025:

All port groups on standard switches must be configured to reject guest Media Access Control (MAC) address changes.

DISA Rule

SV-256421r959010_rule

Vulnerability Number

V-256421

Group Title

SRG-OS-000480-VMM-002000

Rule Version

ESXI-70-000060

Severity

CAT I

CCI(s)

• CCI-000366 - Implement the security configuration settings.

Weight

10

Fix Recommendation

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> Networking >> Virtual Switches.

On each standard switch, click the "..." button next to each port group. Click Edit Settings >> Security tab.

Set "MAC Address Changes" to "Reject".

or

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

Get-VirtualSwitch -Standard | Get-SecurityPolicy | Set-SecurityPolicy -MacChanges $false
Get-VirtualPortGroup -Standard | Get-SecurityPolicy | Set-SecurityPolicy -MacChangesInherited $true

Check Contents

Note: This control addresses ESXi standard switches. Distributed switches are addressed in the vCenter STIG. If there is no standard switch on the ESXi host, this is not applicable.

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> Networking >> Virtual Switches.

On each standard switch, click the "..." button next to each port group. Click View Settings >> Policies tab.

Verify "MAC Address Changes" is set to "Reject".

or

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

Get-VirtualSwitch -Standard | Get-SecurityPolicy
Get-VirtualPortGroup -Standard | Get-SecurityPolicy

If the "MAC Address Changes" policy is set to "Accept" (or "true", via PowerCLI), this is a finding.

Vulnerability Number

V-256421

Documentable

False

Rule Version

ESXI-70-000060

Severity Override Guidance

Note: This control addresses ESXi standard switches. Distributed switches are addressed in the vCenter STIG. If there is no standard switch on the ESXi host, this is not applicable.

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> Networking >> Virtual Switches.

On each standard switch, click the "..." button next to each port group. Click View Settings >> Policies tab.

Verify "MAC Address Changes" is set to "Reject".

or

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

Get-VirtualSwitch -Standard | Get-SecurityPolicy
Get-VirtualPortGroup -Standard | Get-SecurityPolicy

If the "MAC Address Changes" policy is set to "Accept" (or "true", via PowerCLI), this is a finding.

Check Content Reference

M

Target Key

5518