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-223631r864507_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	2022-12-14

Details

Check Text ( C-25304r864505_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-25292r864506_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 NOSETUID SETUID (for Vendor-provided files) SECURITY STARTUP_PROC OMVS