Federation Security Review is not a box to tick. It is an active, methodical dissection of every trust assumption in your system. The process is brutal. It works because it leaves no blind spots.
Federation connects services, organizations, and identities across boundaries. SAML, OIDC, OAuth—these protocols exist to verify identity and pass it along. But these tokens, assertions, and claims carry immense authority. If you don’t validate them with strict rules, they will betray you.
A real federation security review drills deep into:
- Authentication flows: Confirm every source of truth. Verify cryptographic signatures. Reject expired or malformed tokens instantly.
- Authorization policies: Test role mappings, group memberships, and scope restrictions. Never trust default behaviors.
- Metadata integrity: Audit endpoints, certificates, and keys. Rotate secrets on a schedule your attacker cannot predict.
- Logging and observability: Capture every federation event. Keep immutable logs. Build alerts around anomalies in claims or providers.
- Incident response readiness: Practice breach containment scenarios before they happen. Pre-wire your kill switches for rapid trust revocation.
Attackers target federation because it is high leverage. One compromise grants lateral movement across all connected apps. One misconfigured identity provider can hand out access like candy.