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-224087r561402_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.

STIG	Date
IBM z/OS TSS Security Technical Implementation Guide	2021-03-30

Details

Check Text ( C-25760r516660_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