The ESXi host Secure Shell (SSH) daemon must set a timeout interval on idle sessions.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-258766 | ESXI-80-000211 | SV-258766r933359_rule | CCI-000366 | low |
| Description | ||||
| Automatically logging out idle users guards against compromises via hijacked administrative sessions. | ||||
| STIG | Date | |||
| VMware vSphere 8.0 ESXi Security Technical Implementation Guide | 2023-10-11 | |||
Details
Check Text (C-258766r933359_chk)
From an ESXi shell, run the following command:
# esxcli system ssh server config list -k clientaliveinterval
or
From a PowerCLI command prompt while connected to the ESXi host, run the following commands:
$esxcli = Get-EsxCli -v2
$esxcli.system.ssh.server.config.list.invoke() | Where-Object {$_.Key -eq 'clientaliveinterval'}
Example result:
clientaliveinterval 200
If "clientaliveinterval" is not configured to "200", this is a finding.
Fix Text (F-62415r933358_fix)
From an ESXi shell, run the following command:
# esxcli system ssh server config set -k clientaliveinterval -v 200
or
From a PowerCLI command prompt while connected to the ESXi host, run the following commands:
$esxcli = Get-EsxCli -v2
$arguments = $esxcli.system.ssh.server.config.set.CreateArgs()
$arguments.keyword = 'clientaliveinterval'
$arguments.value = '200'
$esxcli.system.ssh.server.config.set.Invoke($arguments)