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 | 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-60135r886421_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". |