2318485 - SAML 2.0: "SAML20 CX_SAML20_CORE: Access by the SOAP request to COMMUNICATION_ERROR was denied with status 1" | SAP Knowledge Base Article

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2318485 - SAML 2.0: "SAML20 CX_SAML20_CORE: Access by the SOAP request to COMMUNICATION_ERROR was denied with status 1"

Symptom

When performing a SAML 2.0 authentication it fails and you are redirected to a logon screen.

In SAML 2.0 traces system raises the following exception:

  • SAML20 CX_SAML20_CORE: Access by the SOAP request to COMMUNICATION_ERROR was denied with status 1

    SAML DUMP.jpg

    To collect the SAML 2.0 traces access the Security Diagnostic Tool in the AS ABAP system by calling the URL below:

    http(s)://<host>:<port>/sap/bc/webdynpro/sap/sec_diag_tool?sap-client=<XXX>

    Press the start button, reproduce the scenario and press the stop button.

    More information regarding the Security Diagnostic Tool for ABAP can be found here.


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Environment

  • SAP NetWeaver AS ABAP 7.02
  • SAP NetWeaver AS ABAP 7.30
  • SAP NetWeaver AS ABAP 7.31
  • SAP NetWeaver AS ABAP 7.40 and higher

Product

SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 2 for SAP NetWeaver 7.0

Keywords

SAML 2.0, SAML2, SAML, ADFS, authentication, single sing-on, sso, fiori, lauchpad, strust, certificate, ssl , KBA , saml , authentication , single sign-on , adfs , saml2 , saml 2.0 , BC-SEC-LGN-SML , SAML 2.0 for ABAP , Problem

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