id: "SA-20" title: "Customized Development of Critical Components" family: "SA" family_name: "System and Services Acquisition" sort_id: "sa-20" priority: "P1" implementation_level: "organization"
Statement
Reimplement or custom develop the following critical system components: {{ insert: param, sa-20_odp }}.
Guidance
Organizations determine that certain system components likely cannot be trusted due to specific threats to and vulnerabilities in those components for which there are no viable security controls to adequately mitigate risk. Reimplementation or custom development of such components may satisfy requirements for higher assurance and is carried out by initiating changes to system components (including hardware, software, and firmware) such that the standard attacks by adversaries are less likely to succeed. In situations where no alternative sourcing is available and organizations choose not to reimplement or custom develop critical system components, additional controls can be employed. Controls include enhanced auditing, restrictions on source code and system utility access, and protection from deletion of system and application files.
Assessment Objective
{{ insert: param, sa-20_odp }} are reimplemented or custom-developed.
Supply chain risk management plan
system and services acquisition policy
procedures addressing the customized development of critical system components
system design documentation
system configuration settings and associated documentation
system development life cycle documentation addressing the custom development of critical system components
configuration management records
system audit records
system security plan
other relevant documents or records
Organizational personnel with system and service acquisition responsibilities
organizational personnel with information security responsibilities
organizational personnel with responsibility for the reimplementation or customized development of critical system components
Organizational processes for the reimplementation or customized development of critical system components
mechanisms supporting and/or implementing the reimplementation or customized development of critical system components