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Mitigation Strategies Analysis for alibaba/druid

Mitigation Strategy: Keep Druid Updated

1. Mitigation Strategy: Keep Druid Updated

  • Description:

    1. Establish a Monitoring Process: Set up automated alerts (e.g., using Dependabot, Renovate) to monitor the official Alibaba Druid GitHub repository (releases and issues) and security advisories.
    2. Regular Update Schedule: Define a schedule for reviewing and applying updates (e.g., monthly, or immediately upon critical security patch release).
    3. Testing: Before deploying to production, thoroughly test the updated Druid version in a staging environment.
    4. Rollback Plan: Have a clear rollback plan.
    5. Documentation: Document the update process.

  • Threats Mitigated:

    • SQL Injection (Critical): Vulnerabilities in Druid's SQL parser or filters.
    • Denial of Service (DoS) (High): DoS vulnerabilities in Druid.
    • Information Disclosure (High): Vulnerabilities exposing information through Druid.
    • Deserialization Vulnerabilities (Critical): If present in Druid.

  • Impact:

    • SQL Injection: Significantly reduces risk.
    • DoS: Reduces likelihood.
    • Information Disclosure: Reduces risk.
    • Deserialization Vulnerabilities: Eliminates risk if patched.

  • Currently Implemented:

    • Partially. Manual checks, no strict schedule. Dependabot not specifically for Druid.

  • Missing Implementation:

    • Automated Druid-specific alerts.
    • Formal update schedule and rollback plan.
    • Consistent staging environment testing.

Mitigation Strategy: Minimize Filter Usage

2. Mitigation Strategy: Minimize Filter Usage

  • Description:

    1. Inventory: List all Druid filters in use.
    2. Justification: Document the reason for each filter.
    3. Elimination: Remove non-essential filters.
    4. Prioritization: Prefer built-in, well-tested Druid filters.
    5. Documentation: Record filters in use, their purpose, and rationale.

  • Threats Mitigated:

    • SQL Injection (Critical): Reduces attack surface within Druid filters.
    • Unknown Vulnerabilities (High): Reduces risk from less-used filters.

  • Impact:

    • SQL Injection: Moderately reduces risk.
    • Unknown Vulnerabilities: Significantly reduces risk.

  • Currently Implemented:

    • Not implemented. Using several filters without clear necessity.

  • Missing Implementation:

    • Inventory and justification of filters needed.
    • Unnecessary filters not removed.

Mitigation Strategy: Strictly Configure wall Filter (If Used)

3. Mitigation Strategy: Strictly Configure wall Filter (If Used)

  • Description:

    1. Whitelist Approach: Configure wall with a whitelist, allowing only known-good SQL patterns.
    2. Regular Expression Review: Use carefully crafted regular expressions.
    3. Testing: Test with valid and invalid SQL queries.
    4. Monitoring: Monitor wall filter logs.
    5. Regular Review: Regularly review and update the configuration.

  • Threats Mitigated:

    • SQL Injection (Critical): Additional defense against SQL injection within Druid.

  • Impact:

    • SQL Injection: Moderately reduces risk (with correct configuration and other measures).

  • Currently Implemented:

    • Partially. wall filter enabled, but likely too permissive.

  • Missing Implementation:

    • Strict whitelist not fully implemented.
    • Regular expression review/testing inconsistent.
    • wall filter log monitoring not in place.

Mitigation Strategy: Disable StatViewServlet in Production

4. Mitigation Strategy: Disable StatViewServlet in Production

  • Description:

    1. Configuration: In druid.properties (or similar), set druid.stat.view.servlet.enable=false.
    2. Verification: Verify the /druid/* endpoint is inaccessible (404 or 403 error).
    3. Environment-Specific Configuration: Use separate config files (e.g., production.properties).

  • Threats Mitigated:

    • Information Disclosure (High): Prevents access to sensitive info exposed by StatViewServlet.

  • Impact:

    • Information Disclosure: Eliminates risk from StatViewServlet.

  • Currently Implemented:

    • Implemented. Disabled in production.

  • Missing Implementation:

    • None.

Mitigation Strategy: Restrict Access to Monitoring Endpoints (If Enabled)

5. Mitigation Strategy: Restrict Access to Monitoring Endpoints (If Enabled)

  • Description:

    1. Identify Endpoints: Identify Druid monitoring endpoints (JMX, custom).
    2. Authentication: Implement strong authentication for these endpoints.
    3. Authorization: Implement authorization for authorized users/roles.
    4. IP Whitelisting: Restrict access to specific IP addresses/ranges. This step is less directly about Druid's configuration and more about network configuration, but it's crucial if Druid's monitoring is exposed.
    5. Network Segmentation: Consider a separate network segment. This step is less directly about Druid's configuration and more about network configuration, but it's crucial if Druid's monitoring is exposed.

  • Threats Mitigated:

    • Information Disclosure (High): Limits access to monitoring data.

  • Impact:

    • Information Disclosure: Significantly reduces risk.

  • Currently Implemented:

    • Partially. Some IP whitelisting, but not comprehensive. Authentication inconsistent.

  • Missing Implementation:

    • Strong authentication/authorization not fully implemented.
    • IP whitelisting not applied to all endpoints.

Mitigation Strategy: Configure Connection Pool Limits

6. Mitigation Strategy: Configure Connection Pool Limits

  • Description:

    1. Analyze Requirements: Determine appropriate settings based on load and database capacity.
    2. maxActive: Set a reasonable limit for maximum active connections.
    3. minIdle: Set a minimum number of idle connections.
    4. maxWait: Set a maximum wait time for a connection.
    5. testOnBorrow / testOnReturn / testWhileIdle: Configure connection validation.
    6. Monitoring: Monitor connection pool usage.

  • Threats Mitigated:

    • Denial of Service (DoS) (High): Prevents connection exhaustion.

  • Impact:

    • DoS: Significantly reduces risk.

  • Currently Implemented:

    • Partially. Some limits configured, but not thoroughly analyzed.

  • Missing Implementation:

    • Thorough analysis of requirements needed.
    • maxWait and connection validation not consistently configured.
    • Connection pool monitoring not fully implemented.

Mitigation Strategy: Implement Timeouts

7. Mitigation Strategy: Implement Timeouts

  • Description:

    1. Identify Operations: Identify all database operations through Druid.
    2. Set Timeouts: Set timeouts (milliseconds) for each operation using Druid's configuration (e.g., queryTimeout, transactionTimeout).
    3. Error Handling: Implement error handling for timeout exceptions.

  • Threats Mitigated:

    • Denial of Service (DoS) (High): Prevents long-running queries.

  • Impact:

    • DoS: Significantly reduces risk.

  • Currently Implemented:

    • Partially. Some timeouts set, but not consistently.

  • Missing Implementation:

    • Comprehensive review of operations and timeouts needed.
    • Consistent error handling for timeouts.

Mitigation Strategy: Avoid Deserializing Untrusted Data

8. Mitigation Strategy: Avoid Deserializing Untrusted Data

  • Description:

    1. Review Configuration: Ensure Druid is not configured to deserialize untrusted data.
    2. Disable Deserialization Features: Disable any such features unless absolutely necessary and the source is trusted.
    3. Input Validation: If unavoidable, validate before passing to Druid. This is less about Druid's configuration and more about how the application uses Druid.

  • Threats Mitigated:

    • Deserialization Vulnerabilities (Critical): Prevents code execution.

  • Impact:

    • Deserialization Vulnerabilities: Eliminates risk if avoided.

  • Currently Implemented:

    • Implemented. Configuration reviewed, no untrusted deserialization.

  • Missing Implementation:

    • None.

Mitigation Strategy: Regularly Review Configuration

9. Mitigation Strategy: Regularly Review Configuration

  • Description:

    1. Schedule: Establish a regular schedule for reviewing Druid's configuration.
    2. Checklist: Create a checklist of security-relevant settings.
    3. Documentation: Document changes and rationale.
    4. Automation: Consider configuration management tools.

  • Threats Mitigated:

    • Misconfiguration (High): Identifies insecure settings.
    • All other threats: Indirectly mitigates by ensuring proper configuration.

  • Impact:

    • Misconfiguration: Significantly reduces risk.
    • All other threats: Improves overall security.

  • Currently Implemented:

    • Not implemented. Ad-hoc reviews, not scheduled.

  • Missing Implementation:

    • Formal schedule and checklist needed.
    • Configuration management tools not used for Druid.

Mitigation Strategy: Use external monitoring tools

10. Mitigation Strategy: Use external monitoring tools

  • Description:

    1. Choose Tools: Select external monitoring tools like Prometheus and Grafana.
    2. Configure Exporters: Configure Druid to expose metrics in a format compatible with the chosen monitoring tools (e.g., using a Prometheus exporter).
    3. Set Up Monitoring: Configure the monitoring tools to collect and visualize the Druid metrics.
    4. Secure Access: Secure access to the monitoring dashboards using authentication and authorization mechanisms.
    5. Alerting: Set up alerts based on the collected metrics to be notified of any anomalies or potential issues.

  • Threats Mitigated:

    • Information Disclosure (High): Avoids exposing sensitive information through Druid's built-in monitoring servlets.
    • DoS (High): Provides better visibility into resource usage, allowing for early detection of potential DoS attacks.

  • Impact:

    • Information Disclosure: Significantly reduces the risk of exposing sensitive information.
    • DoS: Improves the ability to detect and respond to DoS attacks.

  • Currently Implemented:

    • Not implemented.

  • Missing Implementation:

    • External monitoring tools need to be selected, configured, and integrated with Druid.