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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-223852 RACF-US-000150 SV-223852r533199_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. 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 RACF Security Technical Implementation Guide 2020-10-09

Details

Check Text ( C-25525r515244_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-25513r515245_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