SV-205672r1137691: Windows Server 2019 "Deny access to this computer from the network" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and local accounts and from unauthenticated access on all systems. | Microsoft Windows Server 2019 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2019 "Deny access to this computer from the network" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and local accounts and from unauthenticated access on all systems.

Description

Discussion Text

Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny access to this computer from the network" user right defines the accounts that are prevented from logging on from the network. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. Local accounts on domain-joined systems must also be assigned this right to decrease the risk of lateral movement resulting from credential theft attacks. The Guests group must be assigned this right to prevent unauthenticated access.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000213V-93009SV-103097

References

DPMS Target Microsoft Windows Server 2019 DISA DPMS Target Microsoft Windows Server 2019 2907

Checks

DISA STIG (Manual Reference)

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers.

Verify the effective setting in Local Group Policy Editor.

Run "gpedit.msc".

Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment.

If the following accounts or groups are not defined for the "Deny access to this computer from the network" user right, this is a finding:

Domain Systems Only:
- Enterprise Admins group
- Domain Admins group
- "Local account and member of Administrators group" or "Local account" (see Note below)

All Systems:
- Guests group

For server core installations, run the following command:

Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt

Review the text file.

If the following SIDs are not defined for the "SeDenyNetworkLogonRight" user right, this is a finding.

Domain Systems Only:
S-1-5-root domain-519 (Enterprise Admins)
S-1-5-domain-512 (Domain Admins)
S-1-5-114 ("Local account and member of Administrators group") or S-1-5-113 ("Local account")

All Systems:
S-1-5-32-546 (Guests)

Note: These are built-in security groups. "Local account" is more restrictive but may cause issues on servers such as systems that provide failover clustering.

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.windows2019:def:205672
# Windows Server 2019 "Deny access to this computer from the network" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and local accounts and from unauthenticated access on all systems.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# wmi57_object (wmi57_test)
function test_1 {
  return (((Get-CimInstance -Namespace 'root\cimv2' -Query 'SELECT DomainRole FROM win32_computersystem' | Select-Object -First 1) | Select-Object -ExpandProperty 'DomainRole') -eq '3')
}
# Deny access to this computer from the network - Guests
# userright_object (userright_test)
function test_2 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -eq 'Guests')
}
# Deny access to this computer from the network - Domain Admins
# userright_object (userright_test)
function test_3 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -match '^(?i)(.+\\)?Domain Admins$')
}
# Deny access to this computer from the network - Enterprise Admins
# userright_object (userright_test)
function test_4 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -match '^(?i)(.+\\)?Enterprise Admins$')
}
# Deny access to this computer from the network - Local account
# userright_object (userright_test)
function test_5 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -match '^(?i)(NT Authority\\)?Local account$')
}
# Deny access to this computer from the network - Local account and member of Administrators
# userright_object (userright_test)
function test_6 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -match '^(?i)(NT Authority\\)?Local account and member of Administrators group$')
}
# wmi57_object (wmi57_test)
function test_7 {
  return (((Get-CimInstance -Namespace 'root\cimv2' -Query 'SELECT DomainRole FROM win32_computersystem' | Select-Object -First 1) | Select-Object -ExpandProperty 'DomainRole') -eq '2')
}
# Deny access to this computer from the network - Guests
# userright_object (userright_test)
function test_8 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyNetworkLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -eq 'Guests')
}

if (((test_1 -and test_2 -and test_3 -and test_4 -and (test_5 -or test_6)) -or (test_7 -and test_8))) {
  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_server_2019 target this check assesses.

# oval:mil.disa.stig.windows2019:def:205672
$compliant = $true
if (-not (Test-Path -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\AutoShareYes")) { $compliant = $false }
if ((Get-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\" -Name "AutoShareYes" -ErrorAction SilentlyContinue).AutoShareYes -ne 0) { $compliant = $false }
if ((Get-CimInstance -ClassName Win32_ComputerSystem -ErrorAction SilentlyContinue).DomainControllerRole -ne 2) { $compliant = $false }
if ($compliant) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny access to this computer from the network" to include the following:

Domain Systems Only:
- Enterprise Admins group
- Domain Admins group
- "Local account and member of Administrators group" or "Local account" (see Note below)

All Systems:
- Guests group

Note: These are built-in security groups. "Local account" is more restrictive but may cause issues on servers such as systems that provide failover clustering.