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

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-223617	SRG-OS-000080-GPOS-00048	ACF2-US-000020	SV-223617r958472_rule	2025-03-11	9

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.

ℹ️ Check
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
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.