EIDCA-005: Unprotected Groups in CA Exclusions
- Platform
- Entra ID / M365
- Category
- Entra ID Conditional Access
- Severity
- High
- Zero Trust pillar
- Identity (weight 3)
- Golden fixtures
- 3
- Branch coverage
- Observed: fixtures prove the verdicts they exercise
- Provenance
- baseline
What it checks
Groups used in Conditional Access exclusions that lack ownership, membership reviews, or access restrictions can be exploited by attackers to bypass security policies. An attacker who adds themselves to an unprotected exclusion group effectively bypasses all CA controls targeting that group.
Recommended value
All CA exclusion groups have assigned owners, restricted membership management, and regular access reviews enabled
Remediation
Identify all groups referenced in CA policy exclusions and verify each group has an assigned owner, restricted join/leave settings, and an active access review schedule. Enable Privileged Access Group features or restrict group membership changes to authorized administrators only. Remove any unmanaged or orphaned groups from CA exclusions immediately.
Fixture-proven verdicts
Every verdict below is proven by a golden fixture in the module's gating test suite. This table derives from the last green run; it cannot be edited by hand.
| Scenario | Expected verdict |
|---|---|
| clean | PASS |
| known-bad | WARN |
| throttled | Not Assessed |
Framework mappings
- NIST SP 800-53
- AC-6(1), AC-6(5)
- MITRE ATT&CK
- T1078.004
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Guerrilla is written and maintained by Jim Tyler. This copy lives on jimtyler.org; the project also publishes at guerrilla.army.