Unauthorized serial devices must be disconnected on the virtual machine (VM).
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256460 | VMCH-70-000011 | SV-256460r959010_rule | CCI-000366 | medium |
| Description | ||||
| Ensure no device is connected to a virtual machine if it is not required. For example, floppy, serial, and parallel ports are rarely used for virtual machines in a datacenter environment, and CD/DVD drives are usually connected only temporarily during software installation. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 Virtual Machine Security Technical Implementation Guide | 2024-12-16 | |||
Details
Check Text (C-256460r959010_chk)
From the vSphere Client, right-click the Virtual Machine and go to "Edit Settings".
Review the VM's hardware and verify no serial devices exist.
or
From a PowerCLI command prompt while connected to the ESXi host or vCenter server, run the following command:
Get-VM | Where {$_.ExtensionData.Config.Hardware.Device.DeviceInfo.Label -match "serial"}
If a virtual machine has a serial device present, this is a finding.
Fix Text (F-60078r886422_fix)
The VM must be powered off to remove a serial device.
From the vSphere Client, right-click the Virtual Machine and go to "Edit Settings".
Select the serial device, click the circled "X" to remove it, and click "OK".