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V-224854

CAT II (Medium)

The Telnet Client must not be installed.

Rule ID

SV-224854r958480_rule

STIG

Microsoft Windows Server 2016 Security Technical Implementation Guide

Version

V2R10

CCIs

CCI-000382

Discussion

Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.

Check Content

Open "PowerShell".

Enter "Get-WindowsFeature | Where Name -eq Telnet-Client".

If "Installed State" is "Installed", this is a finding.

An Installed State of "Available" or "Removed" is not a finding.

Fix Text

Uninstall the "Telnet Client" feature.

Start "Server Manager".

Select the server with the feature.

Scroll down to "ROLES AND FEATURES" in the right pane.

Select "Remove Roles and Features" from the drop-down "TASKS" list.

Select the appropriate server on the "Server Selection" page and click "Next".

Deselect "Telnet Client" on the "Features" page.

Click "Next" and "Remove" as prompted.