GPO inherited permissions count should be retrievable
AD-GPOREP-09MediumActive DirectoryGroup Policy
Part of Active Directory · Active Directory · Group Policy · All checks
Invoke-Maester -TestId AD-GPOREP-09Overview
Section titled “Overview”Control Type
Section titled “Control Type”Operational
Test-MtAdGpoInheritedPermissionsCount
Section titled “Test-MtAdGpoInheritedPermissionsCount”Counts GPO reports with inherited permissions.
Why This Test Matters
Section titled “Why This Test Matters”- Detective control: checks for inherited permissions in GPOs which may lead to broader access than intended.
Security Recommendation
Section titled “Security Recommendation”- Review inherited permissions and consider removing inheritance where not needed.
How the Test Works
Section titled “How the Test Works”- Scans GPO state for GPO reports with a DACL entry inherited from the parent container (HasInheritedPermissions is true) and reports counts and a small sample.
- A GPO whose permissions could not be read is reported as not evaluated instead of as a finding. The result is then Investigate, or Skipped when no GPO could be evaluated.
Related Tests
Section titled “Related Tests”Test-MtAdGpoInheritedPermissionsCount.
Related links
Section titled “Related links”- Microsoft Learn - Group Policy management
- ANSSI checkpoint: https://www.anssi.gouv.fr/
Details
Section titled “Details”Every attribute of this check
| Field | Value |
|---|---|
| Test ID | AD-GPOREP-09 |
| Severity | Medium |
| Suite | Active Directory |
| Product | Active Directory |
| Feature | Group Policy |
| Area | Access control |
| Resource type | GroupPolicy |
| User impact | Low |
| Implementation cost | Medium |
| MITRE ATT&CK | None |
| PowerShell test | Test-MtAdGpoInheritedPermissionsCount |
| Services | ActiveDirectory |
| Permissions | ActiveDirectory:Ldap:groupPolicyContainer.gPCFileSysPath:ReadProperty, ActiveDirectory:File:SYSVOL:Read |
Source
Section titled “Source”- Test:
tests/ad/gpo-state/Test.AD-GPOREP-09.ps1 - Documentation:
tests/ad/gpo-state/Test.AD-GPOREP-09.md