Code RoomOverpermissive S3 policy
MediumPrep Room Coding #4424

Overpermissive S3 policy

Vibe & agenticSecurityMid–Senior~15 min

An AI agent generated this CDK (TypeScript) snippet to give a Lambda permission to read one config object from S3. A security review flags it. What's wrong and what's the minimal correct version?

Implement
audit_policy_statements(actions: list[str], resources: list[str]) → list[str]
Examples
in[["s3:*"],["*"]]out["both_wildcard"]
in[["s3:GetObject"],["arn:aws:s3:::my-bucket/config.json"]]out["ok"]
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it (tests, edge cases, reading critically), and how you’d re-prompt or decompose to get it right.

0:00 of about 15 min

Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.