DISA STIGS Viewer

Finding ID	Version	Rule ID	IA Controls	Severity
V-275964	ACF2-ZO-000020	SV-275964r1115937_rule		Medium

Description

To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. The systemwide options control the default settings for determining how the ACP will function when handling requests for access to the operating system environment, ACP, and customer data. The ACP provides the ability to set a number of these fields at the subsystem level. If no setting is found, the systemwide defaults will be used. The improper setting of any one of these fields, individually or in combination with another, can compromise the security of the processing environment. In addition, failure to establish standardized settings for the ACP control options introduces the possibility of exposure during a migration process or contingency plan activation.

STIG	Date
IBM z/OS ACF2 Security Technical Implementation Guide	2025-06-24

Check Text (C-80081r1115935_chk)

From ISPF command shell For each appropriate resources class, enter SET RESOURCE (,rsrctype>) List like(-) If ACF2 access rules for each resource in the zOSMF Configuration Guide: Security setup requirements for the Security Configuration Assistant service and Security setup requirements for the Security Configuration Assistant service is restricted to appropriate users, this is not a finding.

Fix Text (F-79986r1115936_fix)

Review the requirements for Security setup requirements for the Security Configuration Assistant service and Security setup requirements for the Security Configuration Assistant service in the zOSMF Configuration Guide. Configure access for resources in accordance.