IBM z/OS Default profiles must not be defined in TSS OMVS UNIX security parameters for classified systems.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-224090 | SRG-OS-000480-GPOS-00227 | TSS0-US-000170 | SV-224090r991589_rule | 2026-03-09 | 9 |
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.
ℹ️ Check
If the system in not classified this is not applicable.
From a command line issue the following command:
TSS MODIFY STATUS
Note: One must have appropriate access to perform this command (have the site security officer to issue command).
If system is classified and UNIQUSER is off i.e., (UNIQUSER(OFF) this is not a finding.
✔️ Fix
Ensure that Use of the OMVS default UIDs will not be allowed on any classified system.
Set Control Option UNIQUSER off.