IBM Support

PH49566: OIDC: CWTAI2047E WHEN MORE THAN ONE KEY WITHOUT ALG CLAIM IN JWK

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APAR status

  • Closed as program error.

Error description

  • When the OpenID Connect (OIDC) Trust Association Interceptor
    (TAI) attempts to process a JWK that contains more than one
    key that do not contain an "alg" claim, an error similar to the
    following error is found in the logs:
    
    CWTAI2047E: No key was found to verify the signature. The
    signature algorithm is [RS256]. The JWT [kid] claim value is
    [YOURKID] and the [x5t] claim value is [YOURX5T]. The
    [jwkEndpointUrl] is [https://acme.com/jwk.jwks]. The
    [signVerifyAlias] property value is [ALIAS].
    
    This issue happens after installing fix pack 9.0.5.13.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    *                  and OIDC                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: OIDC TAI CWTAI2047E error when more     *
    *                      than                                    *
    *                      one key in JWK with no "alg" claim.     *
    ****************************************************************
    * RECOMMENDATION:  Install a fix pack or interim fix that      *
    *                  contains this APAR.                         *
    ****************************************************************
    When the OpenID Connect (OIDC) Trust Association Interceptor
    (TAI) attempts to process a JWK that contains more than one
    key that do not contain an "alg" claim, a CWTAI2047E error might
    occur.
    

Problem conclusion

  • The OIDC TAI is updated to allow for keys with no "sig" claim in
    JWK.
    
    The fix for this APAR is targeted for inclusion in fix pack
    8.5.5.23 and 9.0.5.14. For more information, see 'Recommended
    Updates for WebSphere Application Server':
    https://www.ibm.com/support/pages/node/715553
    

Temporary fix

Comments

APAR Information

  • APAR number

    PH49566

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2022-09-16

  • Closed date

    2022-09-20

  • Last modified date

    2022-09-26

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
26 September 2022