Skip to main content

Responding By Component

ssp-figure-35.png

Retrofit Adoption Path MVP

When converting a Word-based FedRAMP SSP to OSCAL, move all control responses to the this-system component.

Every OSCAL SSP must have a this-system component defined. It is the only required component.

system-security-plan:
  system-implementation:
    components:
    - uuid: 11111111-2222-4000-8000-009000000000
      type: this-system
      title: This System
      description: 'Represents the entire authorization boundary'
      status:
        state: operational

Every statements / by-components array has exactly one entry that references the this-system component and includes the content from the Word-based SSP.

Each statements array entry includes:

  • a required uuid field
  • a required by-components array. Each array entry includes:
    • a required component-uuid field that cites the this-sytem component from above.
    • a required uuid field
    • a required description field that contains the content from the Word-based SSP control response.
    • a required implementation-status element with:
      • a required state field with a value of of implemented.
system-security-plan:
  control-implementation:
    description: n/a.
    implemented-requirements:
    - uuid: 11111111-2222-4000-8000-012000010000
      control-id: ac-1
      statements:
      - statement-id: ac-1_smt.a
        uuid: 11111111-2222-4000-8000-012000010100
        by-components:
        - component-uuid: 11111111-2222-4000-8000-009000000000
          uuid: 11111111-2222-4000-8000-012000010101
          description: Word-based SSP AC-1, statement a response.
          implementation-status:
            state: implemented
      - statement-id: ac-1_smt.b
        uuid: 11111111-2222-4000-8000-012000010200
        by-components:
        - component-uuid: 11111111-2222-4000-8000-009000000000
          uuid: 11111111-2222-4000-8000-012000010201
          description: Word-based SSP AC-1, statement b response.
      - statement-id: ac-1_smt.c
        uuid: 11111111-2222-4000-8000-012000010300
        by-components:
        - component-uuid: 11111111-2222-4000-8000-009000000000
          uuid: 11111111-2222-4000-8000-012000010301
          description: Word-based SSP AC-1, statement c response.
          implementation-status:
            state: implemented


Native Adoption Path

When creating an SSP from scratch, ensure appropriate components are defined before authoring a control response. The this-system component must always be present. Other components are present baed on their use within the sytem. See Components for more information.

system-security-plan:
  system-implementation:
    components:
    - uuid: 11111111-2222-4000-8000-009000000000
      type: this-system
      title: This System
      description: 'Represents the entire authorization boundary'
      status:
        state: operational

    - uuid: 11111111-2222-4000-8000-009000500001
      type: service
      title: Service A
      description: 'An authorized service from a leveraged CSO.'
      status:
        state: operational
        
    - uuid: 11111111-2222-4000-8000-009000600001
      type: policy
      title: Access Control and Identity Management Policy
      description: 'A corporate policy used for the system.'
      status:
        state: operational

Every statements / by-components array has one or more entries that reference components describes how that component is satisfying that control requirement statement.




The "This System" Component

There must always be a "This System" component in the SSP. This is used in several ways:

  • Holistic Overview: The SSP author may wish to provide a more holistic overview of how several components work together, even if details are provided individually in other by-component assemblies.

  • Catch-all: Any control response that does not cleanly align with another system component may be described in the "This System" component.

  • Legacy SSP Conversion: When converting a legacy SSP to OSCAL, the legacy control response statements may initially be associated with the "This System" component until the SSP author is able to provide responses for individual components.


---