IBM z/OS UNIX security parameters in etc/profile must be properly specified.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223617	ACF2-US-000020	SV-223617r861185_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.

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	2024-02-22

Details

Check Text ( C-25290r858894_chk )
From the ISPF COMMAND SHELL enter: ISHELL /etc/profile If the final or only instance of the UMASK command in /etc/profile is specified as "umask 077", this is not a finding. If the LOGNAME variable is marked read-only (i.e., "readonly LOGNAME") in /etc/profile, this is not a finding.

Fix Text (F-25278r500987_fix)
Configure the etc/profile to specify the UMASK command is executed with a value of 077 and the LOGNAME variable is marked read-only for the /etc/profile file, exceptions are documented with the ISSO.