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IBM z/OS UNIX OMVS parameters in PARMLIB must be properly specified.


Overview

Finding ID Version Rule ID IA Controls Severity
V-223629 ACF2-US-000140 SV-223629r533198_rule Medium
Description
Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements.
STIG Date
IBM z/OS ACF2 Security Technical Implementation Guide 2022-06-22

Details

Check Text ( C-25302r504845_chk )
Refer to the IEASYS00 member of SYS1.PARMLIB.

If the parameter is specified as OMVS=xx or OMVS=(xx,xx,…) in the IEASYSxx member, this is not a finding.

If the OMVS statement is not specified, OMVS=DEFAULT is used. In minimum mode there is no access to permanent file systems or to the shell, and IBM’s Communication Server TCP/IP will not run.
Fix Text (F-25290r504846_fix)
Configure the settings in PARMLIB and /etc for z/OS UNIX security parameters with values that conform to the specifications below:

The parameter is specified as OMVS=xx or OMVS=(xx,xx,…) in the IEASYSxx member.

Note: If the OMVS statement is not specified, OMVS=DEFAULT is used. In minimum mode there is no access to permanent file systems or to the shell, and IBM's Communication Server TCP/IP will not run.