feat(scan): --saml-tamper SAML assertion sig-strip and NameID-swap bypass mutator#34
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…p bypass Add SAMLTamper mutator targeting SAML SSO assertion-layer auth bypasses (ASVS V3.5.3 / OWASP SAML Cheat Sheet): signature-strip removes <ds:Signature> to test SP signature-skip misconfiguration; nameid-swap replaces <saml:NameID> with a privileged target while preserving the original signature to test NameID-after-validation bypass. Both variants emit authn-bypass/critical findings. 16 tests; all existing tests pass.
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Summary
SAMLTampermutator (--saml-tamper) targeting SAML SSO assertion-layer authentication bypasses (ASVS V3.5.3 / OWASP SAML Security Cheat Sheet)<ds:Signature>to detect SP signature-validation misconfiguration (POSSESSION-SAML-SIG-STRIP, critical)<saml:NameID>with a privileged target while preserving original signature (POSSESSION-SAML-NAMEID-SWAP, critical)--saml-tamper)Test plan
internal/mutate/saml_tamper_test.go— all passbuildregistry_forbidden_test.gofor new signatureinternal/detect/tuning.go