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Status Not under consideration
Workspace CICS Transaction Server for z/OS
Categories Runtime
Created by Guest
Created on Feb 9, 2023

RELATED IDEAS

CICS should execute the EXEC CICS GET CONTAINER INTO command under the EXECKEY of requesting program to honor CICS storage protection.

Currently when a USERKEY task executes an EXEC CICS GET CONTAINER INTO if the receiving data area is smaller than the container data the program creates a storage violation. Because CICS processes the GET CONTAINER command on behalf of the task, and CICS is executing in CICSKEY, a user task can overlay CICS control blocks that should be protected by CICS storage protection. The proposal, if possible, is to determine if the task is running in USERKEY and, if so, switch the execute key to USERKEY before processing the GET CONTAINER API command. If the task then tries to overwrite CICS control blocks the hardware will cause the task to abend with a protection exception. 

Idea priority High
  • Guest
    Reply
    |     Sep 3, 2024
    CICS Development: CICS has been updated to check container storage access in the correct EXECKEY. This change was made by APAR PH24145. There are no plans to further extend the storage checking for INTO areas on other commands.
  • Guest
    Reply
    |     Mar 4, 2023
    CICS Development: This is a candidate for a future release. Current the CMDPROT (aka "Hired Gun") functionality only checks the validity of the first byte of the storage area supplied to CICS to write into.
  • Guest
    Reply
    |     Mar 4, 2023

    I would be great if CICS could check that the area belongs to the task and is large enough.


    2 replies

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