SV-253278r958480: The Telnet Client must not be installed on the system. | Microsoft Windows 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

The Telnet Client must not be installed on the system.

Description

Discussion Text

The "Telnet Client" is not installed by default. Some protocols and services do not support required security features, such as encrypting passwords or traffic.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000382

References

DPMS Target Microsoft Windows 11 DISA DPMS Target Microsoft Windows 11 5471

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.stig.windows11:def:253278
# The Telnet Client must not be installed on the system.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# The Telnet Client is not installed on the system
# wmi57_object (wmi57_test)
function test_1 {
  return (((Get-CimInstance -Namespace 'root\cimv2' -Query 'SELECT installstate FROM win32_optionalfeature WHERE name = ''TelnetClient''' | Select-Object -First 1) | Select-Object -ExpandProperty 'installstate') -eq '2')
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_windows_11 target this check assesses.

# oval:mil.disa.stig.windows11:def:253278
if (!(Get-CimInstance -ClassName Win32_OptionalFeature -Filter "Name='TelnetClient'").InstallState -eq 2) { Write-Output "FAIL"; exit 1 } else { Write-Output "PASS"; exit 0 }

Remediation

Uninstall "Telnet Client" from the system.

Run "Programs and Features".
Select "Turn Windows Features on or off".

De-select "Telnet Client".