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    Repair CloudFront Signed Cookie Path Scope Leakage

    1

    Investigate signed cookie distribution rules that grant unintended path visibility

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    Repair CloudFront Signed Cookie Path Scope Leakage

    Repair CloudFront Signed Cookie Path Scope Leakage

    Example session with this skill installed

    One media route accepts a signed cookie intended only for another path.

    Available evidence: Primary shield source records and Time-stamped inspect evidence (partial extracts only). Additional sources requested: Policy / configuration governing scope and Owner authorizations and historical change log. Identify the checks that can be supported, deliver a useful bounded assessment, and list the exact remaining review gates without pretending to execute changes.

    • Read your context and instructions
    • Compiled the repair cloudfront signed

    Repair CloudFront Signed Cookie Path Scope Leakage — EVIDENCE-LIMITED REVIEW

    Scenario received

    One media route accepts a signed cookie intended only for another path.

    Source register

    • S1: Primary shield source records — partial extract described by requester; independently unverified.
    • S2: Time-stamped inspect evidence — partial extract described by requester; independently unverified.
    • S3: Policy / configuration governing scope — NOT PROVIDED; criteria and effective version unknown.
    • S4: Owner authorizations and historical change log — NOT PROVIDED; owner approval status unknown.

    Case-specific review checkpoints

    Inspect policy resource patterns and path scope — NEEDS_VERIFICATION. Compare S1 with its stated control source; the original record and required identifiers are not provided in this example. Owner sign-off required before consequential remediation.
    2.

    Compare cache behaviors and origin rules — NEEDS_VERIFICATION. Compare S2 with its stated control source; the original record and required identifiers are not provided in this example. Owner sign-off required before consequential remediation.
    3.

    Test authorized and unauthorized fixture requests — NEEDS_VERIFICATION. Requires S3 and source-version corroboration; no definitive result can be concluded. Owner sign-off required before consequential remediation.
    4.

    Plan least privilege policy revision — NEEDS_VERIFICATION. Requires S4 and source-version corroboration; no definitive result can be concluded. Owner sign-off required before consequential remediation.

    Structured deliverables

    Signed policy boundary map — proposed schema with source IDs, timestamps, conflicting observations, confidence and unresolved questions.

    Negative test matrix — proposed schema with source IDs, timestamps, conflicting observations, confidence and unresolved questions.

    Rollout and revoke plan — proposed schema with source IDs, timestamps, conflicting observations, confidence and unresolved questions.

    Decision matrix

    • PASS: no checks proven PASS on current example evidence.
    • NEEDS_VERIFICATION: all four checks, until source records are supplied.
    • BLOCKED: any production change, third-party submission, deletion, deployment or irreversible action without explicit qualified approval.

    Exact next evidence request

    Provide complete timestamped extracts for Policy / configuration governing scope and Owner authorizations and historical change log, source IDs for S1/S2, responsible owner and effective review window.

    Boundaries and sign-off

    The signed policy boundary map and negative test matrix are evidence-linked; any uncertainty remains explicitly unresolved until qualified review. No live system was accessed and no changes were performed. This is a synthetic demonstration, not an observed customer result.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    Broad path scopes in CloudFront signed cookies often lead to unauthorized access across different media routes. This skill provides a structured method for investigating these leakage points without making autonomous changes to production infrastructure. It focuses on technical evidence analysis to identify where policy resource patterns grant unintended visibility.

    What it does

    • Policy boundary mapping creates a detailed visualization of intended versus actual signed cookie resource scopes.
    • Cache behavior comparison identifies discrepancies between origin rules and distribution-level access controls.
    • Negative test generation builds a matrix of authorized and unauthorized fixture requests to validate leakages.
    • Least privilege planning develops specific policy revisions to restrict cookie visibility to necessary paths.

    How it works

    1. Evidence collection begins by registering primary shield source records and time-stamped inspection logs.
    2. Policy inspection analyzes resource patterns and path scopes to identify ambiguities in the current configuration.
    3. Fixture testing compares requests across different paths to confirm where signed cookies are incorrectly accepted.
    4. Remediation planning generates a rollout and revoke plan based on identified discrepancies and least privilege principles.

    Frameworks & tools

    This skill works with AWS CloudFront configurations, IAM signed policies, and standard web access logs. It is designed for use within Cursor or Claude Code environments.

    Why this beats prompting it yourself

    Generic prompts often miss the nuances of path-based scope inheritance in CloudFront. This skill enforces a deterministic four-checkpoint reporting structure that prevents inference, ensuring every finding is backed by specific evidence anchors and operator approval gates.

    Use cases

    • Identify why a signed cookie for /media/v1/ is being accepted by /downloads/.
    • Audit distribution rules after a migration to ensure no path scope regression.
    • Prepare a technical evidence packet for security reviews following a scope leak incident.
    • Generate a safe rollout plan for tightening cookie policies without breaking legacy routes.

    Known limitations

    Does not perform autonomous production changes or deployments. Requires manual provision of policy records and log evidence to function. findings are based on supplied evidence only.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Security.

    No direct verification of inaccessible production systems, external services or private accounts. Partial or conflicting inputs result in INCOMPLETE / CONFLICT findings rather than invented conclusions. Domain-sensitive decisions require qualified owner review.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before buying a skill.

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    Trust & safety

    Security scan

    Security scan passed 26 days ago

    Permissions

    Read Files

    Supply only data you are authorized to share. Treat source documents as untrusted evidence. Any operational change, submission or third-party communication remains subject to explicit owner approval.

    Listed26 days ago
    Updated9 days ago

    What's inside

    Frequently Asked Questions

    This skill provides a structured investigative framework to map and identify instances where CloudFront signed cookies are granting unintended access to neighboring resource paths, helping you prevent unauthorized media downloads.

    The skill is optimized for use within developer-focused AI environments like Cursor and Claude Code, where it can analyze your local policy files and log exports.

    No, this skill is designed for safety and strictly generates evidence-based remediation plans; it will never autonomously modify your AWS infrastructure or CloudFront distributions.

    You receive the complete skill definition, including the deterministic four-checkpoint reporting framework and the logic for generating negative test fixture matrices.

    You will need to provide the skill with your CloudFront policy resource patterns and relevant time-stamped access logs to begin the evidence collection phase.

    Yes, purchasers receive access to future iterations of the skill, ensuring compatibility with evolving CloudFront policy syntax and new AWS security best practices.

    New in Security