AC-4(31)

Requirement

When transferring information between different security domains, prevent the transfer of failed content to the receiving domain.

Discussion

Content that failed filtering checks can corrupt the system if transferred to the receiving domain.

NIST 800-53A Assessment Guidance

Examine

[SELECT FROM: Information flow enforcement policy; procedures addressing information flow enforcement; system design documentation; system configuration settings and associated documentation; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: Organizational personnel with information flow enforcement responsibilities; system/network administrators; organizational personnel with information security responsibilities].

Test

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

ID	Assessment Objectives
AC-04(31)	when transferring information between different security domains, the transfer of failed content to the receiving domain is prevented.

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