How To Fix SUSR_CERT053 - Syntax error: Logon attribute &1 must be in the reversed subject filter

SAP Error Message - Details

• Message type: E = Error

• Message class: SUSR_CERT - User Certificates Administration

• Message number: 053

• Message text: Syntax error: Logon attribute &1 must be in the reversed subject filter

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SUSR_CERT053 - Syntax error: Logon attribute &1 must be in the reversed subject filter ?

  The SAP error message SUSR_CERT053 indicates a syntax error related to the logon attribute in the context of certificate-based authentication. Specifically, it states that the logon attribute must be in the reversed subject filter. This error typically arises when there is a mismatch or misconfiguration in the certificate settings or the way the subject attributes are defined in the system.
  Cause:
  
  Incorrect Subject Filter Configuration: The subject filter in the SAP system may not be correctly defined. The subject filter is used to map the attributes from the certificate to the user logon attributes in SAP.
  Reversed Subject Attributes: The error suggests that the attributes in the certificate are not in the expected order or format. The system expects the attributes to be in a specific reversed order.
  Certificate Issues: The certificate being used for authentication may not contain the expected attributes or may be incorrectly formatted.
  
  Solution:
  
  
  Check Subject Filter Configuration:
  
  Go to the transaction code SICF (HTTP Service Hierarchy Maintenance) and check the configuration for the service that is using certificate-based authentication.
  Ensure that the subject filter is correctly defined and that it matches the attributes present in the certificate.
  
  
  
  Review Certificate Attributes:
  
  Inspect the certificate being used for authentication. You can do this by exporting the certificate and examining its details (e.g., using OpenSSL or a similar tool).
  Ensure that the attributes in the certificate (like CN, O, OU) are correctly set and match what is expected in the SAP system.
  
  
  
  Adjust the Logon Attributes:
  
  If necessary, adjust the logon attributes in the SAP system to match the attributes in the certificate. This may involve changing the configuration in the user management settings or the security settings.
  
  
  
  Testing:
  
  After making the necessary changes, test the logon process again to see if the error persists.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to certificate-based authentication for any specific guidelines or updates that may apply to your version of SAP.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Security Configuration: Review the overall security configuration in your SAP system, especially if you are using Single Sign-On (SSO) or other authentication mechanisms.
  User Management: Ensure that the user accounts are correctly set up and that the necessary roles and authorizations are assigned.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the steps you have already taken.