SC-23(5)—Allowed Certificate Authorities
>Control Description
Only allow the use of ⚙organization-defined certificate authorities for verification of the establishment of protected sessions.
>Cross-Framework Mappings
>Supplemental Guidance
Reliance on certificate authorities for the establishment of secure sessions includes the use of Transport Layer Security (TLS) certificates. These certificates, after verification by their respective certificate authorities, facilitate the establishment of protected sessions between web clients and web servers.
>Related Controls
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What policies govern the implementation of allowed certificate authorities?
- •How are system and communications protection requirements defined and maintained?
- •Who is responsible for configuring and maintaining the security controls specified in SC-23(5)?
Technical Implementation:
- •How is allowed certificate authorities technically implemented in your environment?
- •What systems, tools, or configurations enforce this protection requirement?
- •How do you ensure that allowed certificate authorities remains effective as the system evolves?
- •How are session timeouts and termination controls configured?
Evidence & Documentation:
- •What documentation demonstrates the implementation of SC-23(5)?
- •Can you provide configuration evidence or system diagrams showing this protection control?
- •What logs or monitoring data verify that this control is functioning correctly?
- •Can you show session management configuration settings?
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