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V-258762

CAT II (Medium)

The ESXi host Secure Shell (SSH) daemon must not permit user environment settings.

Rule ID

SV-258762r933347_rule

STIG

VMware vSphere 8.0 ESXi Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

SSH environment options potentially allow users to bypass access restriction in some configurations. Users must not be able to present environment options to the SSH daemon.

Check Content

From an ESXi shell, run the following command:

# esxcli system ssh server config list -k permituserenvironment

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 'permituserenvironment'}

Example result:

permituserenvironment no

If "permituserenvironment" is not configured to "no", this is a finding.

Fix Text

From an ESXi shell, run the following command:

# esxcli system ssh server config set -k permituserenvironment -v no

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 = 'permituserenvironment'
$arguments.value = 'no'
$esxcli.system.ssh.server.config.set.Invoke($arguments)