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


Overview

Finding ID Version Rule ID IA Controls Severity
V-223631 ACF2-US-000160 SV-223631r533198_rule Medium
Description
Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.
STIG Date
IBM z/OS ACF2 Security Technical Implementation Guide 2022-06-22

Details

Check Text ( C-25304r504851_chk )
Refer to the proper BPXPRMxx member in 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-25292r504852_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