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Status Under review
Workspace Db2 for z/OS
Created by Guest
Created on Jul 30, 2021

DB2 z/OS security; hide install SYSADM and SYSOPR from DSNZPARM; use RACF instead

In DB2 z/OS, no group and/or userids are more powerful than the Install SYSADM and to no small degree the Install SYSOPR.

Yet, these userids and/or groups are easily found by anyone having access to a db2 subsystem and knowing the existance of DSNZPARM. Loading that module in storage from a hlq.SDSNEXIT will show a list of userids and/or groups a hacker would like to know.

If using DB2/RACF security, I propose that two things should happen to support this proposal:

  • RACF/DB2 should allow class DSNADM to have some new SYSADM and SYSOPR types like:

    • ssid.userid.INSTALLSYSADM1 (userid or group)

    • ssid.userid.INSTALLSYSADM2 (userid or group)

    • ssid.userid.INSTALLSYSOPR1 (userid or group)

    • ssid.userid.INSTALLSYSOPR2 (userid or group)

  • DSNTIJUZ when assembling macro DSN6SPRM should have some new features

    • if SYSADM, SYSADM2, SYSOPR1, SYSOPR2 have non-blank values it should generate a mnote 4 ... perhaps with a warning to see security manual for how they could be converted to a entry in class DSNADM.

    • And the DB2 subsystem, seeing blank values, should try to find the install sysadm or install sysopr userid/group names in RACF class DSNADM instead of allowing anyone to find them in DSNZPARM.


Needed By Not sure -- Just thought it was cool