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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

A company hosts development and production workloads in separate AWS accounts linked by AWS Organizations. Security requires that only EC2 instances tagged Environment=Prod can read objects in the central prod-data S3 bucket. Instances are launched dynamically by an Auto Scaling group. Which access-control approach best enforces this requirement without maintaining static role lists?

  • Grant s3:GetObject access by listing the Auto Scaling group's instance profile ARNs in the bucket policy and update the list whenever new roles are created.

  • Attach an IAM role tagged Environment=Prod to each instance and create an S3 bucket policy that allows s3:GetObject when the aws:PrincipalTag/Environment condition equals "Prod".

  • Configure a bucket ACL that grants read permission to all requests originating from the production VPC CIDR range.

  • Add a security group rule that permits outbound HTTPS traffic only from production instances to the prod-data bucket's public endpoint.

ISC2 Systems Security Certified Practitioner (SSCP)
Access Controls
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