NIST Special Publication 800-171 Revision 2
Date Published: January 28th, 2021
Withdrawn on May 14, 2024. Superseded by SP 800-171 Rev. 3
Author(s): Ron Ross (NIST), Victoria Pillitteri (NIST), Kelley Dempsey (NIST), Mark Riddle (NARA), Gary Guissanie (IDA)
Note: A Class Deviation is in effect as of May 2, 2024 (DEVIATION 2024O0013). The deviation clause requires contractors, who are subject to 252.204-7012, to comply with National Institute of Standards and Technology (NIST) Special Publication (SP) 800-171 Revision 2, instead of the version of NIST SP 800-171 in effect at the time the solicitation is issued or as authorized by the contracting officer. Click Here
AC-3.1.22 Control CUI posted or processed on publicly accessible systems.
Control Family: Access Control
Control Type: Derived
SPRS Value: 1
SPRS Supplemental Guidance:
N/A
CMMC Level(s):
AC.L2-3.1.14
Top Ten Failed Requirement:
No
Referenced in:
DFARS 252.204-7012
Derived From: NIST SP 800-53r4
AC-22
NIST Supplemental Guidance:
N/A
Discussion:
In accordance with laws, Executive Orders, directives, policies, regulations, or standards, the public is not authorized access to nonpublic information (e.g., information protected under the Privacy Act, CUI, and proprietary information). This requirement addresses systems that are controlled by the organization and accessible to the public, typically without identification or authentication. Individuals authorized to post CUI onto publicly accessible systems are designated. The content of information is reviewed prior to posting onto publicly accessible systems to ensure that nonpublic information is not included.
Upon assessment, assessors must determine if-
3.1.22[a] individuals authorized to post or process information on publicly accessible
systems are identified.
3.1.22[b] procedures to ensure CUI is not posted or processed on publicly accessible
systems are identified.
3.1.22[c] a review process is in place prior to posting of any content to publicly
accessible systems.
3.1.22[d] content on publicly accessible systems is reviewed to ensure that it does not
include CUI.
3.1.22[e] mechanisms are in place to remove and address improper posting of CUI.
Assessors are instructed to-
Examine: [SELECT FROM: Access control policy; procedures addressing publicly accessible content; system security plan; list of users authorized to post publicly accessible content on organizational systems; training materials and/or records; records of publicly accessible information reviews; records of response to nonpublic information on public websites; system audit logs and records; security awareness training records; other relevant documents or records].
Interview: [SELECT FROM: Personnel with responsibilities for managing publicly accessible information posted on organizational systems; personnel with information security responsibilities].
Test: [SELECT FROM: Mechanisms implementing management of publicly accessible content].
Potential Solutions Based on Staffing
1-10 FTE |
10-49 FTE |
50-249 FTE |
250-999 FTE |
1000+ FTE |
|---|---|---|---|---|
| WatchGuard Firebox UTM | WatchGuard Firebox UTM | WatchGuard Firebox UTM | Multiple Options | Multiple Options |
| Netwrix Auditor | Netwrix Auditor | Netwrix Auditor | Netwrix Auditor | Netwrix Auditor |
| Microsoft Intune | Microsoft Intune | Microsoft Intune | Microsoft Intune | Microsoft Intune |
| DISA STIGs | DISA STIGs | Tripwire Enterprise | Tripwire Enterprise | Tripwire Enterprise |
| CIS Benchmarks | CIS Benchmarks | DISA STIGs | DISA STIGs | DISA STIGs |
| CIS SecureSuite | CIS SecureSuite | CIS Benchmarks | CIS Benchmarks | CIS Benchmarks |
| CIS SecureSuite | CIS SecureSuite | CIS SecureSuite |