The system must disconnect unauthorized serial devices.

From VMware vSphere Virtual Machine Version 6 Security Technical Implementation Guide

Part of SRG-OS-000480-VMM-002000

Associated with: CCI-000366

SV-78589r1_rule The system must disconnect unauthorized serial devices.

Vulnerability discussion

Ensure that 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.

Check content

From the vSphere Client select the Virtual Machine right click and go to Edit Settings. Review the VMs 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

The VM must be powered off in order to remove a serial device. From the vSphere Client select the Virtual Machine right click and go to Edit Settings. Select the serial device and click remove then OK.

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