IBM z/OS UNIX BPXPRMxx security parameters in PARMLIB must be properly specified.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-224087 | TSS0-US-000140 | SV-224087r991589_rule | CCI-000366 | 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 TSS Security Technical Implementation Guide | 2025-06-24 | |||
Details
Check Text (C-224087r991589_chk)
Refer to the BPXPRM00 member of SYS1.PARMLIB.
If the required parameter keywords and values are defined as detailed below, this is not a finding.
Parameter Keyword Value
SUPERUSER BPXROOT
TTYGROUP TTY
STEPLIBLIST /etc/steplib
USERIDALIASTABLE Will not be specified.
ROOT SETUID will be specified
MOUNT NOSETUID
SETUID (for Vendor-provided files)SECURITY
STARTUP_PROC OMVS
Fix Text (F-25748r516661_fix)
Define the settings in PARMLIB member BPXPRMxx for z/OS UNIX security parameters values to conform to the specifications below:
Parameter Keyword Value
SUPERUSER BPXROOT
TTYGROUP TTY
STEPLIBLIST /etc/steplib
USERIDALIASTABLE Will not be specified.
ROOT SETUID will be specified
MOUNT NOSETUIDSETUID (for Vendor-provided files)SECURITY
STARTUP_PROC OMVS