The ESXi Common Information Model (CIM) service must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258783	ESXI-80-000228	SV-258783r933410_rule		Medium

Description
The CIM system provides an interface that enables hardware-level management from remote applications via a set of standard application programming interfaces (APIs). These APIs are consumed by external applications such as HP SIM or Dell OpenManage for agentless, remote hardware monitoring of the ESXi host. To reduce attack surface area and following the minimum functionality principal, the CIM service must be disabled unless explicitly needed and approved.

Description

The CIM system provides an interface that enables hardware-level management from remote applications via a set of standard application programming interfaces (APIs). These APIs are consumed by external applications such as HP SIM or Dell OpenManage for agentless, remote hardware monitoring of the ESXi host. To reduce attack surface area and following the minimum functionality principal, the CIM service must be disabled unless explicitly needed and approved.

STIG	Date
VMware vSphere 8.0 ESXi Security Technical Implementation Guide	2023-10-11

Details

Check Text ( C-62523r933408_chk )
From the vSphere Client, go to Hosts and Clusters. Select the ESXi Host >> Configure >> System >> Services. Under "Services", locate the "CIM Server" service and verify it is "Stopped" and the "Startup Policy" is set to "Start and stop manually". or From a PowerCLI command prompt while connected to the ESXi host, run the following command: Get-VMHost \| Get-VMHostService \| Where {$_.Label -eq "CIM Server"} If the "CIM Server" service does not have a "Policy" of "off" or is running, this is a finding.

Check Text ( C-62523r933408_chk )

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> System >> Services.

Under "Services", locate the "CIM Server" service and verify it is "Stopped" and the "Startup Policy" is set to "Start and stop manually".

or

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

Get-VMHost | Get-VMHostService | Where {$_.Label -eq "CIM Server"}

If the "CIM Server" service does not have a "Policy" of "off" or is running, this is a finding.

Fix Text (F-62432r933409_fix)
From the vSphere Client, go to Hosts and Clusters. Select the ESXi Host >> Configure >> System >> Services. Under "Services" select the "CIM Server" service and click the "Stop" button. Click "Edit Startup policy..." and select the "Start and stop manually" radio button. Click "OK". or From a PowerCLI command prompt while connected to the ESXi host, run the following commands: Get-VMHost \| Get-VMHostService \| Where {$_.Label -eq "CIM Server"} \| Set-VMHostService -Policy Off Get-VMHost \| Get-VMHostService \| Where {$_.Label -eq "CIM Server"} \| Stop-VMHostService

Fix Text (F-62432r933409_fix)

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> System >> Services.

Under "Services" select the "CIM Server" service and click the "Stop" button.

Click "Edit Startup policy..." and select the "Start and stop manually" radio button. Click "OK".

or

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

Get-VMHost | Get-VMHostService | Where {$_.Label -eq "CIM Server"} | Set-VMHostService -Policy Off
Get-VMHost | Get-VMHostService | Where {$_.Label -eq "CIM Server"} | Stop-VMHostService