NIST 800-171 - Public Accessible Content (3.1.22)

Overview:
Control information posted or processed on publicly accessible information systems.

Action Items:
3.1.22[a]
Determine if: individuals authorized to post or process information on publicly accessible systems are identified.

3.1.22[b]
Determine if: procedures to ensure CUI is not posted or processed on publicly accessible systems are identified.

3.1.22[c]
Determine if: a review process is in place prior to posting of any content to publicly accessible systems.

3.1.22[d]
Determine if: content on publicly accessible systems is reviewed to ensure that it does not include CUI.

3.1.22[e]
Determine if: mechanisms are in place to remove and address improper posting of CUI.

POTENTIAL ASSESSMENT METHODS AND OBJECTS

1
Examine: 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].

2
Interview: Personnel with responsibilities for managing publicly accessible information posted on organizational systems; personnel with information security responsibilities].

3
Test: Mechanisms implementing management of publicly accessible content].

Related Documents (document name and content will vary by organization):
1) Access control policy
2) procedures addressing publicly accessible content
3) system security plan
4) list of users authorized to post publicly accessible content on organizational systems
5) training materials and/or records
6) records of publicly accessible information reviews
7) records of response to nonpublic information on public websites
8) system audit logs and records
9) security awareness training records
10) other relevant documents or records

Additional Guidance:
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.