SI-17 SI · System and Information Integrity

Fail-safe Procedures

LOW MODERATE HIGH
1 Overlay 4 Related Controls
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Requirements NIST SOURCE

Implement the indicated fail-safe procedures when the indicated failures occur: [organization-defined list of failure conditions and associated fail-safe procedures].

Discussion (NIST Supplemental Guidance)

Failure conditions include the loss of communications among critical system components or between system components and operational facilities. Fail-safe procedures include alerting operator personnel and providing specific instructions on subsequent steps to take. Subsequent steps may include doing nothing, reestablishing system settings, shutting down processes, restarting the system, or contacting designated organizational personnel.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for SI-17 yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. fail-safe procedures associated with failure conditions are defined;
  2. a list of failure conditions requiring fail-safe procedures is defined;
  3. <SI-17_ODP[01] fail-safe procedures> are implemented when <SI-17_ODP[02] list of failure conditions> occur.

Examine

[SELECT FROM: System and information integrity policy; system and information integrity procedures; documentation addressing fail-safe procedures for the system; system design documentation; system configuration settings and associated documentation; list of security safeguards protecting the system memory from unauthorized code execution; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel responsible for fail-safe procedures; organizational personnel with information security responsibilities; system/network administrators; system developer].

Test

[SELECT FROM: Organizational fail-safe procedures; automated mechanisms supporting and/or implementing fail-safe procedures].

Overlays

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

  • Base control: Added (beyond standard baseline)

MODERATE

  • Base control: Added (beyond standard baseline)

HIGH

  • Base control: Added (beyond standard baseline)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for SI-17. This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • System and information integrity policy
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Organizational fail-safe procedures
  • automated mechanisms supporting and/or implementing fail-safe procedures

Other Records

  • system and information integrity procedures
  • documentation addressing fail-safe procedures for the system
  • list of security safeguards protecting the system memory from unauthorized code execution
  • system audit records
  • other relevant documents or records