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Assessment Title
Rule Text
The application must ensure each unique asserting party provides unique assertion ID references for each SAML assertion.
Description
Discussion Text
SAML is a standard for exchanging authentication and authorization data between security domains. SAML uses security tokens containing assertions to pass information about a principal (usually an end user) between a SAML authority, (identity provider), and a SAML consumer, (service provider). SAML assertions are usually made about a subject, (user) represented by the <Subject> element. SAML assertion identifiers should be unique across a system implementation. Duplicate SAML assertion identifiers could lead to unauthorized access to a web service.
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