Crucial Exams

ISC2 Certified Cloud Security Professional (CCSP) Practice Question

While troubleshooting an API hosted on IaaS virtual machines, you notice repeated calls to 169.254.169.254 right after each external request is processed. The developer explains that the code pulls temporary cloud credentials from the instance metadata service on every transaction. From a secure cloud development perspective, which change should you recommend first to reduce the risk of Server-Side Request Forgery (SSRF) attacks against the metadata endpoint?

  • Remove outbound egress filtering to ensure the metadata service remains reachable even under heavy load.

  • Store static access keys in environment variables so the code no longer contacts the metadata IP address.

  • Configure the application to use the cloud provider's hardened metadata service flow that requires a session token or header (e.g., IMDSv2) before credentials are returned.

  • Implement mutual TLS between microservices and stop using the metadata service entirely.

ISC2 Certified Cloud Security Professional (CCSP)
Cloud Application Security
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