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IT26557: When ChlAuthEarlyAdopt is enabled the MQCSP supplied by the application is authenticated prior

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APAR status

  • Closed as program error.

Error description

  • After applying APAR IT25839, it is observed that a security
    exit, when called with SEC_PARMS, may not influence the MQCSP
    security that is used for CONNAUTH checking, if
    ChlAuthEarlyAdopt is enabled.
    
    
    An example of an affected scenario is as follows:
    
    A client application attempted to connect to a queue manager by
    passing invalid credentials in the MQCSP structure.  Those
    credentials were corrected by a server-side security exit but
    the connection failed and the application received a
    MQRC_NOT_AUTHORIZED error.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    This issue affects users of MQ V8 and later who configure their
    queue manager with the setting chlauthearlyadopt=y and use a
    security exit to change the contents of the MQCSP structure.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    A logic error in the MQ code prevented the queue manager from
    using the credentials returned by the security exit for
    authentication.
    

Problem conclusion

  •  The queue manager logic has been modified to fix this error so
    that the user is authenticated using the new credentials after
    the security exit has been called.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v8.0       8.0.0.11
    v9.0 LTS   9.0.0.6
    v9.1 CD    9.1.2
    v9.1 LTS   9.1.0.1
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26557

  • Reported component name

    IBM MQ BASE MP

  • Reported component ID

    5724H7251

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-10-09

  • Closed date

    2018-11-15

  • Last modified date

    2019-04-02

  • 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

    IBM MQ BASE MP

  • Fixed component ID

    5724H7251

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0.0.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
02 April 2019