IBM z/OS TSS STIG Version Comparison

There are 7 differences between versions v9 r3 (Jan. 30, 2025) (the "left" version) and v9 r5 (July 2, 2025) (the "right" version).

Check TSS0-IC-000060 was added to the benchmark in the "right" version.

This check's original form is available here.

Title

ICSF resource class(es) must be properly owned in accordance with security requirements.

Check Content

From the ISPF command shell, enter: TSS WHOOWNS <CLASS> If each of the following classes are properly owned, this is not a finding: CRYPTOZ CSFKEYS CSFSERV GCSFKEYS XCSFKEY

Discussion

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. Access control policies include: identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include: access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.

Fix

Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option as specified in the example below: The TSS Command WHOOWNS should identify any missing resource classes. The ADDTO (RDT) can be used to define resources to the Resource Descriptor Table. Ex. TSS ADDTO(RDT) RESCLAS(CRYPTOZ) ACLS6(READ) Use the ADDTO command function to assign CRYPTOZ appropriate resource ownership.