SV-205705r1051074: Windows Server 2019 Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less. | Microsoft Windows Server 2019 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2019 Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less.

Description

Discussion Text

This setting determines the period of time (in days) during which a user's TGT may be renewed. This security configuration limits the amount of time an attacker has to crack the TGT and gain access. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058

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

IA Controls

NIST SP 800-53

Not mappedCCI-001941Not mappedCCI-001942SV-103535V-93449

References

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

Checks

DISA STIG (Manual Reference)

This applies to domain controllers. It is NA for other systems.

Verify the following is configured in the Default Domain Policy:

Open "Group Policy Management".

Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain).
 
Right-click on the "Default Domain Policy".

Select "Edit".

Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy.

If the "Maximum lifetime for user ticket renewal" is greater than "7" days, this is a finding.

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:205705
# Windows Server 2019 Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Kerberos Policy - Maximum lifetime for user ticket renewal - 7 days or less
# wmi57_object (wmi57_test)
function test_1 {
  return (((Get-CimInstance -Namespace 'root\rsop\computer' -Query 'SELECT setting FROM RSOP_SecuritySettingNumeric WHERE KeyName=''MaxRenewAge''' | Select-Object -First 1) | Select-Object -ExpandProperty 'setting') -eq '7')
}

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_server_2019 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows2019:def:205705
$compliance = Get-CimInstance -ClassName Win32_LocallyDefinedAccount -Filter "Name='Default Domain Policy'" -ErrorAction SilentlyContinue | Select-Object -ExpandProperty PSObject -ErrorAction SilentlyContinue | Get-Member -MemberType Property -ErrorAction SilentlyContinue | Where-Object { $_.Name -eq 'KerberosPolicy' } -ErrorAction SilentlyContinue | Select-Object -ExpandProperty Value -ErrorAction SilentlyContinue | Where-Object { $_ -is [PSCustomObject] -and $_.MaxRenewAge -eq 7 } -ErrorAction SilentlyContinue
if ($compliance) { Write-Output "PASS"; exit 0 } else { Write-Output "FAIL"; exit 1 }

Remediation

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Maximum lifetime for user ticket renewal" to a maximum of "7" days or less.