STIGUI
V-275960CAT II — Medium severitySV-275960r1269374_rule

zOSMF resources must be protected in accordance with security requirements.

Rule version TSS0-ZO-000020 · STIG v9 · 2026-09-01

Discussion

To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoW-approved PKIs, all DoW 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.

Check

From the ISPF command shell, enter WHOOWNS as follows: EJBROLE * LOGSTRM * SERVER * TSOPROC * ZMFAPLA * ZMFCLOUD *

For each resource defined, enter: TSS WHOHAS <resource>(resource item>

If TSS access rules for each resource are restricted to appropriate users as found in Appendix A in the zOSMF Configuration Guide: Security Structures for z/OSMF Requirements for the Security Configuration tables, this is not a finding.

Fix

Configure ICSF access for resources in accordance with site security plan.

Identifiers

Group ID
V-275960
Group title
SRG-OS-000080-GPOS-00048
Rule ID
SV-275960r1269374_rule
Check ID
C-80077r1169907_chk
Fix ID
F-79982r1169803_fix