PH19684: DFHWB0001 AN ABEND (CODE 0C4/AKEA) HAS OCCURRED AT OFFSET X'035E' IN MODULE DFHWBCL AFTER A WEB OPEN

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• You are running CICS TS 5.4 and receive a system dump taken for
  the following reason:
  DFHWB0001 applid An abend (code 0C4/AKEA) has occurred at
            offset X'035E' in module DFHWBCL.
  .
  Backing up in the CICS internal TRACE we see the following
  Trace leading up to the exception:
  AP 00E1 EIP ENTRY WEB-OPEN
  AP F911 EIWB  EXIT  - WEB_OPEN RESP=17 RESP2=42
  AP 00E1 EIP EXIT WEB-OPEN IOERR
  AP 00E1 EIP ENTRY WEB-SEND
  WB 0704 WBCL  *EXC* - RECOVERY_ENTERED FUNCTION(WRITE_REQUEST)
                        METHOD(GET) CLOSE(NO) ACTION(IMMEDIATE)
                        AUTHENTICATION(BASIC)
                        SESSION_TOKEN(40404040 , 40404040)
                        PATH(address , 00000040)
                        USERNAME(address , 00000007)
                        PASSWORD(address0 ,00000008)
  The WEB-SEND was issued with an invalid SESSION TOKEN, and
  should just be rejected, but code in DFHWBCL program checks
  trying to reference the bad address.
  Additional symptom(s): KIXREVDAM
  0C4 webopen sessiontoken offset 35E WBCL abend0c4
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS Users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: MSGDFHWB0001 ABEND0C4 in DFHWBCL at     *
  *                      offset 035E during EXEC CICS WEB SEND   *
  *                      or EXEC CICS WEB CONVERSE.              *
  ****************************************************************
  An application issues EXEC CICS WEB SEND or EXEC CICS WEB
  CONVERSE passing an invalid SESSTOKEN value.
  DFHWBCL routine WRITE_REQUEST is called. This routine discovers
  that the SESSTOKEN is not valid and raises an exception.
  However, before it returns the exception response, it sets a
  local pointer - WBO_PTR which is derived from the invalid
  SESSTOKEN. This invalid pointer is used in an attempt to
  reference a WBO block leading to the ABEND0C4.
  
  Additional keywords : 0C4 S0C4 ABENDS0C4 WB0001
  

Problem conclusion

• DFHWBCL routine WRITE_REQUEST has been changed to ensure that
  the WBO is not referenced when an application passes an invalid
  SESSTOKEN.
  

Temporary fix

Comments

APAR Information

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

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

  UI67641

Modules/Macros

• DFHWBCL
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R100 PSY UI67641

     UP20/01/31 P F001

Fix is available

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