Title

IBM z/OS UNIX BPXPRMxx security parameters in PARMLIB must be properly specified. (Cat II impact)

Discussion

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.

Check Content

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

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

Additional Identifiers

Rule ID: SV-223631r864507_rule

Vulnerability ID: V-223631

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.