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saml-sso-assertion-attacks

SAML SSO assertion attack playbook. Use when testing signature validation, assertion wrapping, audience restrictions, ACS handling, XML trust boundaries, and enterprise SSO flaws.

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SKILL: SAML SSO and Assertion Attacks — Signature Validation, Binding, and Trust Confusion

AI LOAD INSTRUCTION: Use this skill when the target uses SAML-based SSO and you need to validate assertion trust: signature coverage, audience and recipient checks, ACS handling, XML parsing weaknesses, and IdP/SP confusion.

1. WHEN TO LOAD THIS SKILL

Load when:

  • Enterprise SSO uses SAML requests or responses
  • You see SAMLRequest, SAMLResponse, XML assertions, or ACS endpoints
  • Login flows involve an external IdP and browser POST/redirect binding

2. HIGH-VALUE MISCONFIGURATION CHECKS

ThemeWhat to Check
signature validationunsigned assertion accepted, wrong node signed, signature wrapping
audience and recipientweak Audience, Recipient, Destination, or ACS validation
issuer trustwrong IdP accepted or multi-tenant issuer confusion
replay and freshnessmissing InResponseTo, weak NotBefore / NotOnOrAfter enforcement
account mappingemail-only binding, case folding, unverified attributes
XML parser behaviorXXE-like parser issues or unsafe transforms around SAML documents

3. QUICK TRIAGE

  1. Capture one full login round trip.
  2. Inspect which XML nodes are signed and which attributes drive account binding.
  3. Compare SP-initiated and IdP-initiated flows.
  4. Test replay, altered attributes, and assertion placement confusion.

4. RELATED ROUTES

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

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