How To Fix SAML2137 - Assertion not validated successfully

SAP Error Message - Details

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 137

• Message text: Assertion not validated successfully

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2137 - Assertion not validated successfully ?

  The SAP error message SAML2137: Assertion not validated successfully typically occurs in the context of Single Sign-On (SSO) configurations using Security Assertion Markup Language (SAML). This error indicates that the SAML assertion received by the SAP system could not be validated successfully, which can be due to several reasons.
  Causes of SAML2137
  
  
  Invalid Signature: The SAML assertion may be signed with a certificate that is not trusted by the SAP system, or the signature may be invalid.
  
  
  Expired Assertion: The assertion may have expired. SAML assertions have a validity period defined by the NotBefore and NotOnOrAfter attributes.
  
  
  Incorrect Audience: The audience specified in the assertion does not match the expected audience configured in the SAP system.
  
  
  Clock Skew: There may be a time synchronization issue between the Identity Provider (IdP) and the SAP system, leading to assertions being considered expired or not yet valid.
  
  
  Configuration Issues: There may be misconfigurations in the SAML settings, such as incorrect endpoints, certificates, or metadata.
  
  
  Missing Attributes: Required attributes in the assertion may be missing or not correctly mapped to the user in the SAP system.
  
  
  Solutions to SAML2137
  
  
  Check Certificate Trust:
  
  Ensure that the certificate used to sign the SAML assertion is trusted by the SAP system. You may need to import the IdP's signing certificate into the SAP trust store.
  
  
  
  Validate Assertion Timing:
  
  Check the NotBefore and NotOnOrAfter timestamps in the assertion to ensure they are valid. Adjust the system time if necessary to resolve clock skew issues.
  
  
  
  Verify Audience:
  
  Ensure that the audience specified in the SAML assertion matches the expected audience configured in the SAP system.
  
  
  
  Review SAML Configuration:
  
  Double-check the SAML configuration settings in the SAP system, including endpoints, certificates, and metadata. Ensure they match the IdP configuration.
  
  
  
  Check Required Attributes:
  
  Ensure that all required attributes are present in the SAML assertion and that they are correctly mapped to the user in the SAP system.
  
  
  
  Enable Logging:
  
  Enable detailed logging for SAML authentication in the SAP system to gather more information about the error. This can help identify the specific cause of the validation failure.
  
  
  
  Related Information
  
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to SAML authentication and the SAML2137 error.
  Documentation: Review the official SAP documentation on SAML configuration and troubleshooting for additional guidance.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By systematically checking these areas, you should be able to identify and resolve the cause of the SAML2137 error in your SAP environment.