SC-4: Information In Shared Resources
The information system prevents unauthorized and unintended information transfer via shared system resources.
|V-73057||Database contents must be protected from unauthorized and unintended information transfer by enforcement of a data-transfer policy.||skipped|
|V-73059||Access to database files must be limited to relevant processes and to authorized, administrative users.||passed|
This control prevents information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. This control does not address: (i) information remanence which refers to residual representation of data that has been nominally erased or removed; (ii) covert channels (including storage and/or timing channels) where shared resources are manipulated to violate information flow restrictions; or (iii) components within information systems for which there are only single users/roles.