STIGQter STIGQter: STIG Summary: VMware vSphere 8.0 ESXi Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 31 Oct 2023:

The ESXi host must configure virtual switch security policies to reject forged transmits.

DISA Rule

SV-258771r933374_rule

Vulnerability Number

V-258771

Group Title

SRG-OS-000480-VMM-002000

Rule Version

ESXI-80-000216

Severity

CAT II

CCI(s)

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 "Edit" and select Security.

Set "Forged transmits" to "Reject". Click "OK".

For each port group, click the '...' button and select "Edit Settings" then Security.

Set "Forged transmits" to "Reject" and uncheck the "Override" box. Click "OK".

or

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

Get-VirtualSwitch | Get-SecurityPolicy | Set-SecurityPolicy -ForgedTransmits $false
Get-VirtualPortGroup | Get-SecurityPolicy | Set-SecurityPolicy -ForgedTransmitsInherited $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 and select "Edit Settings".

Click the "Security" tab. Verify that "Forged transmits" is set to "Reject" and that "Override" is not checked.

or

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

Get-VirtualSwitch | Get-SecurityPolicy
Get-VirtualPortGroup | Get-SecurityPolicy | Select-Object *

If the "Forged Transmits" policy is set to "Accept" (or "true", via PowerCLI) or the security policy inherited from the virtual switch is overridden, this is a finding.

Vulnerability Number

V-258771

Documentable

False

Rule Version

ESXI-80-000216

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 and select "Edit Settings".

Click the "Security" tab. Verify that "Forged transmits" is set to "Reject" and that "Override" is not checked.

or

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

Get-VirtualSwitch | Get-SecurityPolicy
Get-VirtualPortGroup | Get-SecurityPolicy | Select-Object *

If the "Forged Transmits" policy is set to "Accept" (or "true", via PowerCLI) or the security policy inherited from the virtual switch is overridden, this is a finding.

Check Content Reference

M

Target Key

5562