SC-23—Session Authenticity
IL4 Mod
IL4 High
IL5
IL6
>Control Description
Protect the authenticity of communications sessions.
>DoD Impact Level Requirements
No specific parameter values or requirements for this impact level.
>Discussion
Protecting session authenticity addresses communications protection at the session level, not at the packet level. Such protection establishes grounds for confidence at both ends of communications sessions in the ongoing identities of other parties and the validity of transmitted information. Authenticity protection includes protecting against man-in-the-middle attacks, session hijacking, and the insertion of false information into sessions.
>Programmatic Queries
Beta
Related Services
CloudFront
ALB
API Gateway
CLI Commands
Check CloudFront HTTPS settings
aws cloudfront get-distribution --id DIST_ID --query 'Distribution.DistributionConfig.ViewerCertificate'List ALB HTTPS listeners
aws elbv2 describe-listeners --load-balancer-arn ALB_ARN --query 'Listeners[*].{Port:Port,Protocol:Protocol,SSL:SslPolicy}'Check API Gateway TLS
aws apigateway get-domain-names --query 'items[*].{Domain:domainName,Security:securityPolicy}'Verify SSL policies
aws elbv2 describe-ssl-policies --query 'SslPolicies[*].{Name:Name,Protocols:SslProtocols,Ciphers:Ciphers[*].Name}'>Related Controls
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What policies govern the implementation of session authenticity?
- •How are system and communications protection requirements defined and maintained?
- •Who is responsible for configuring and maintaining the security controls specified in SC-23?
Technical Implementation:
- •How is session authenticity technically implemented in your environment?
- •What systems, tools, or configurations enforce this protection requirement?
- •How do you ensure that session authenticity remains effective as the system evolves?
- •How are session timeouts and termination controls configured?
Evidence & Documentation:
- •What documentation demonstrates the implementation of SC-23?
- •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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