Detection of Unsanctioned Information

LOW MODERATE HIGH

1 Overlay 1 Related Control

Requirements NIST SOURCE

When transferring information between different security domains, examine the information for the presence of [unsanctioned information] and prohibit the transfer of such information in accordance with the [organization-defined security or privacy policy].

Discussion (NIST Supplemental Guidance)

Unsanctioned information includes malicious code, information that is inappropriate for release from the source network, or executable code that could disrupt or harm the services or systems on the destination network.

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 AC-4(15) 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

unsanctioned information to be detected is defined;
security policy that requires the transfer of unsanctioned information between different security domains to be prohibited is defined (if selected);
privacy policy that requires the transfer of organization-defined unsanctioned information between different security domains to be prohibited is defined (if selected);
when transferring information between different security domains, information is examined for the presence of <AC-04(15)_ODP[01] unsanctioned information>;
when transferring information between different security domains, transfer of <AC-04(15)_ODP[01] unsanctioned information> is prohibited in accordance with the <AC-04(15)_ODP[02] security policy>;
when transferring information between different security domains, transfer of <AC-04(15)_ODP[01] unsanctioned information> is prohibited in accordance with the <AC-04(15)_ODP[03] privacy policy>.

Examine

[SELECT FROM: Access control policy; information flow control policies; procedures addressing information flow enforcement; system design documentation; system configuration settings and associated documentation; list of unsanctioned information types and associated information; system audit records; system security plan; privacy plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with information security responsibilities; organizational personnel with privacy responsibilities; system developers].

Test

[SELECT FROM: Mechanisms implementing information flow enforcement policy].

Overlays

Showing the OT/ICS overlay for the parent control AC-4 — see the AC-4(15) entries within each baseline below.

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

Not applicable at this tier.

MODERATE

Base control: Included (matches standard baseline)

HIGH

Base control: Included (matches standard baseline)
Included: (4)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-4(15). 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

Access control policy
information flow control policies
system security plan
privacy plan

Configuration

system design documentation
system configuration settings and associated documentation

Testing

Mechanisms implementing information flow enforcement policy

Other Records

procedures addressing information flow enforcement
list of unsanctioned information types and associated information
system audit records
other relevant documents or records