The CA-TSS Facility Control Option must specify the sub option of MODE=FAIL.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-223957 | TSS0-ES-000840 | SV-223957r958808_rule | CCI-001774 | high |
| Description | ||||
| Utilizing a whitelist provides a configuration management method for allowing the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as whitelisting. Verification of white-listed software occurs prior to execution or at system startup. This requirement applies to operating system programs, functions, and services designed to manage system processes and configurations (e.g., group policies). | ||||
| STIG | Date | |||
| IBM z/OS TSS Security Technical Implementation Guide | 2025-06-24 | |||
Related Frameworks
3 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-7(5)
1.00
- DISA · 9 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.4.8
1.00
- DISA · 9 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-001774
1.00
- DISA · 9 · disa_xccdf · related
Details
Check Text (C-223957r958808_chk)
From the ISPF Command Shell enter:
TSS MODIFY(FACILITY(ALL))
If the Facility Control Option does not specifies the sub option of "MODE=FAIL" for all facilities, this is a finding.
Fix Text (F-25618r516271_fix)
Evaluate the impact associated with implementation of the Facility Control Option MODE sub-option. Develop a plan of action to implement the Facility Control Option MODE sub-option setting to "MODE=FAIL" and proceed with the change.