SV-226278r794583: Ejection of removable NTFS media must be restricted to Administrators. | Microsoft Windows Server 2012/2012 R2 Domain Controller STIG SCAP Benchmark

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Assessment Title

Rule Text

Ejection of removable NTFS media must be restricted to Administrators.

Description

Discussion Text

Removable hard drives, if they are not properly configured, can be formatted and ejected by users who are not members of the Administrators Group. Formatting and ejecting removable NTFS media must only be done by administrators.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366CCE-25217-1SV-52875V-1171

References

DPMS Target Microsoft Windows Server 2012-2012 R2 DC DISA DPMS Target Microsoft Windows Server 2012-2012 R2 DC 4217

Checks

OVAL

oval:mil.disa.fso.windows:var:454600 ← xccdf_mil.disa.stig_value_allow_format_eject_removable_media_var

DISA STIG (Manual Reference)

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE 
Registry Path: \Software\Microsoft\Windows NT\CurrentVersion\Winlogon\

Value Name: AllocateDASD

Value Type: REG_SZ
Value: 0

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.fso.windows:def:4546
# Ejection of removable NTFS media must be restricted to Administrators.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Devices: Allowed to Format and Eject Removable Media' is set to 'Administrators'
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon').GetValueKind('AllocateDASD').ToString()]) -eq 'reg_sz') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon' -Name 'AllocateDASD' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'AllocateDASD') -le 0))
}

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_2012_and_2012_r2_dc target this check assesses.

# OVAL Definition: oval:mil.disa.fso.windows:def:4546
$regPath = "HKLM:\Software\Microsoft\Windows NT\CurrentVersion\Winlogon"
$regValue = (Get-ItemProperty -Path $regPath -Name "AllocateDASD" -ErrorAction SilentlyContinue).AllocateDASD -eq 0
if ($regValue -eq $null) { exit 1 } else { exit 0 }

Remediation

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Devices: Allowed to format and eject removable media" to "Administrators".