IBM z/OS system administrator must develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-223574	SRG-OS-000363-GPOS-00150	ACF2-OS-002330	SV-223574r958794_rule	2025-03-11	9

Description
Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security. Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the operating system. The operating system's IMO/ISSO and SAs must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item.

Description

Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security. Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the operating system. The operating system's IMO/ISSO and SAs must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item.

ℹ️ Check
Ask the system administrator for the procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner. If there is no procedure, this is a finding.

✔️ Fix
Develop a procedure to notify designated personnel if baseline configurations are changed in an unauthorized manner.