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V-258739

CAT II (Medium)

The ESXi host must set a timeout to automatically end idle shell sessions after fifteen minutes.

Rule ID

SV-258739r1003562_rule

STIG

VMware vSphere 8.0 ESXi Security Technical Implementation Guide

Version

V2R4

CCIs

CCI-001133 CCI-002361

Discussion

If a user forgets to log out of their local or remote ESXi Shell session, the idle connection will remain open indefinitely and increase the likelihood of inappropriate host access via session hijacking. The "ESXiShellInteractiveTimeOut" allows the automatic termination of idle shell sessions. Satisfies: SRG-OS-000163-VMM-000700, SRG-OS-000279-VMM-001010

Check Content

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> System >> Advanced System Settings.

Select the "UserVars.ESXiShellInteractiveTimeOut" value and verify it is set to "900" or less and not "0".

or

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

Get-VMHost | Get-AdvancedSetting -Name UserVars.ESXiShellInteractiveTimeOut

If the "UserVars.ESXiShellInteractiveTimeOut" setting is set to a value greater than "900" or "0", this is a finding.

Fix Text

From the vSphere Client, go to Hosts and Clusters.

Select the ESXi Host >> Configure >> System >> Advanced System Settings.

Click "Edit". Select the "UserVars.ESXiShellInteractiveTimeOut" value and configure it to "900".

or

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

Get-VMHost | Get-AdvancedSetting -Name UserVars.ESXiShellInteractiveTimeOut | Set-AdvancedSetting -Value 900