The ESXi host must be configured to disable nonessential capabilities by disabling Secure Shell (SSH).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-258754	ESXI-80-000193	SV-258754r933323_rule		Medium

Description
The ESXi Shell is an interactive command line interface (CLI) available at the ESXi server console. The ESXi shell provides temporary access to commands essential for server maintenance. Intended primarily for use in break-fix scenarios, the ESXi shell is well suited for checking and modifying configuration details, which are not always generally accessible, using the vSphere Client. The ESXi shell is accessible remotely using SSH by users with the Administrator role. Under normal operating conditions, SSH access to the host must be disabled as is the default. As with the ESXi shell, SSH is also intended only for temporary use during break-fix scenarios. SSH must therefore be disabled under normal operating conditions and must only be enabled for diagnostics or troubleshooting. Remote access to the host must therefore be limited to the vSphere Client or Host Client at all other times. Satisfies: SRG-OS-000095-VMM-000480, SRG-OS-000297-VMM-001040, SRG-OS-000298-VMM-001050

Description

The ESXi Shell is an interactive command line interface (CLI) available at the ESXi server console. The ESXi shell provides temporary access to commands essential for server maintenance. Intended primarily for use in break-fix scenarios, the ESXi shell is well suited for checking and modifying configuration details, which are not always generally accessible, using the vSphere Client. The ESXi shell is accessible remotely using SSH by users with the Administrator role. Under normal operating conditions, SSH access to the host must be disabled as is the default. As with the ESXi shell, SSH is also intended only for temporary use during break-fix scenarios. SSH must therefore be disabled under normal operating conditions and must only be enabled for diagnostics or troubleshooting. Remote access to the host must therefore be limited to the vSphere Client or Host Client at all other times. Satisfies: SRG-OS-000095-VMM-000480, SRG-OS-000297-VMM-001040, SRG-OS-000298-VMM-001050

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

Details

Check Text ( C-62494r933321_chk )
From the vSphere Client, go to Hosts and Clusters. Select the ESXi Host >> Configure >> System >> Services. Under Services, locate the "SSH" service and verify it is "Stopped". or From a PowerCLI command prompt while connected to the ESXi host, run the following command: Get-VMHost \| Get-VMHostService \| Where {$_.Label -eq "SSH"} If the SSH service is "Running", this is a finding.

Fix Text (F-62403r933322_fix)
From the vSphere Client, go to Hosts and Clusters. Select the ESXi Host >> Configure >> System >> Services. Under "Services", select the "SSH" service and click the "Stop" button. Click the "Edit Startup policy..." button. 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 {$_.Label -eq "SSH"} \| Set-VMHostService -Policy Off Get-VMHost \| Get-VMHostService \| Where {$_.Label -eq "SSH"} \| Stop-VMHostService

Fix Text (F-62403r933322_fix)

From the vSphere Client, go to Hosts and Clusters.

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

Under "Services", select the "SSH" service and click the "Stop" button.

Click the "Edit Startup policy..." button.

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