SV-25115r1: The default permissions of global system objects are not increased. | Windows 7 Security Technical Implementation Guide

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Assessment Title

Rule Text

The default permissions of global system objects are not increased.

Description

Discussion Text

Windows system maintains a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each type of object is created with a default DACL that specifies who can access the objects with what permissions. If this policy is enabled, the default DACL is stronger, allowing non-admin users to read shared objects, but not modify shared objects that they did not create.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366CCE-9191-8

Additional Details

Third-Party Tools

Responsibility

System Administrator

References

DPMS Target Windows 7 DISA DPMS Target Windows 7 1712

Checks

OVAL

oval:mil.disa.fso.windows:var:372500 ← xccdf_mil.disa.stig_value_system_objects_strengthen_default_permissions_internal_system_objects_var

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:3725
# The default permissions of global system objects are not increased.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'System objects: Strengthen default permissions of internal system objects (e.g. Symbolic Links)' is set to 'Enabled'
# 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\SYSTEM\CurrentControlSet\Control\Session Manager').GetValueKind('ProtectionMode').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager' -Name 'ProtectionMode' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'ProtectionMode') -eq 1))
}

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 windows_7 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.windows:def:3725
if (Test-Path -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\ProtectionMode" -ErrorAction SilentlyContinue) { $regValue = Get-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Name ProtectionMode -ErrorAction SilentlyContinue } else { $regValue = $null } if ($regValue -and $regValue.ProtectionMode -eq 1) { 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 -> Security Options -> “System Objects: Strengthen default permissions of internal system objects (e.g. Symbolic links)” to “Enabled”.