id: "SC-04" title: "Information in Shared System Resources" family: "SC" family_name: "System and Communications Protection" sort_id: "sc-04" priority: "P1" implementation_level: "system" enhancements: - sc-4.1 - sc-4.2
Statement
Prevent unauthorized and unintended information transfer via shared system resources.
Guidance
Preventing unauthorized and unintended information transfer via shared system resources stops information produced by the actions of prior users or roles (or the actions of processes acting on behalf of prior users or roles) from being available to current users or roles (or current processes acting on behalf of current users or roles) that obtain access to shared system resources after those resources have been released back to the system. Information in shared system resources also applies to encrypted representations of information. In other contexts, control of information in shared system resources is referred to as object reuse and residual information protection. Information in shared system resources does not address information remanence, which refers to the residual representation of data that has been nominally deleted; covert channels (including storage and timing channels), where shared system resources are manipulated to violate information flow restrictions; or components within systems for which there are only single users or roles.
Assessment Objective: unauthorized information transfer via shared system resources is prevented;
Assessment Objective: unintended information transfer via shared system resources is prevented.
System and communications protection policy
procedures addressing information protection in shared system resources
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
System/network administrators
organizational personnel with information security responsibilities
system developer
Mechanisms preventing the unauthorized and unintended transfer of information via shared system resources