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Mitigation Strategies Analysis for getredash/redash

Mitigation Strategy: Data Source Least Privilege (Redash-Specific Aspects)

  • Description:

    1. Redash User/Group Permissions: Within Redash's user and group management interface, ensure that users and groups are granted access only to the specific data sources they require. Do not grant blanket access to all data sources.
    2. Query-Level Restrictions (Ideal, but may require custom development): Explore the possibility of implementing query-level restrictions within Redash. This is a more advanced mitigation and might involve modifying Redash's code. The goal is to limit users to specific types of queries or even specific tables/columns within a data source, even if the underlying database connection has broader permissions. This is a fallback if database-level least privilege is not fully achievable.
    3. Regular Audits within Redash: Periodically (e.g., monthly) review the data source permissions assigned to users and groups within the Redash UI. Remove any unnecessary access.

  • Threats Mitigated:

    • Malicious Insider (High): Limits the damage a malicious or compromised Redash user account can inflict. Even with Redash access, they are restricted to specific data sources.
    • Accidental Data Exposure (Medium): Prevents users from accidentally accessing or sharing data they shouldn't have access to.
    • Compromised Redash Account (High): Reduces the scope of damage if a Redash user account is compromised.

  • Impact:

    • Malicious Insider: Risk reduced from High to Low/Medium (depending on the user's role and assigned data sources).
    • Accidental Data Exposure: Risk reduced from Medium to Low.
    • Compromised Redash Account: Risk reduced from High to Low/Medium.

  • Currently Implemented:

    • Partially implemented. Redash's group-based permissions are used, but not consistently or with the strictest possible granularity.

  • Missing Implementation:

    • Systematic review and tightening of data source permissions for all users and groups within Redash.
    • Exploration of query-level restrictions (custom development).
    • Regular, scheduled audits of Redash user/group permissions.

Mitigation Strategy: Enforce Query Parameterization (Redash-Specific Aspects)

  • Description:

    1. User Training (Focused on Redash): Conduct training sessions specifically focused on how to use parameterized queries within the Redash query editor. Provide Redash-specific examples and demonstrate the correct syntax.
    2. Redash Documentation: Create clear and concise documentation, integrated into Redash's help system or as a readily accessible resource, that explains parameterized queries within Redash.
    3. Query Validation (Custom Development within Redash): This is the most crucial Redash-specific aspect. Modify Redash's code to:
      • Detect Non-Parameterized Queries: Implement logic to analyze queries before execution and identify those that do not use parameters.
      • Warn/Block Non-Parameterized Queries: Configure Redash to either warn the user or block the execution of non-parameterized queries. Ideally, provide a clear error message explaining why the query was blocked and how to fix it.
      • Exemptions (Carefully Managed): Provide a mechanism for administrators to carefully exempt specific queries or users from this rule, if absolutely necessary (e.g., for legacy queries that cannot be easily parameterized). This should be logged and audited.

  • Threats Mitigated:

    • SQL Injection (Critical): Parameterized queries, enforced within Redash, are the primary defense against SQL injection attacks originating from Redash.

  • Impact:

    • SQL Injection: Risk reduced from Critical to Very Low (if properly implemented and enforced within Redash).

  • Currently Implemented:

    • Partially implemented. Redash's query editor supports parameterized queries, and some documentation exists. However, usage is not enforced, and no validation mechanisms exist within Redash.

  • Missing Implementation:

    • Mandatory user training focused on Redash's parameterization features.
    • Crucially: Custom development within Redash to detect, warn, and/or block non-parameterized queries.
    • A system for managing exemptions to the parameterization rule.

Mitigation Strategy: Implement Content Security Policy (CSP) (Redash-Specific)

  • Description:

    1. Analyze Redash's Code: Thoroughly analyze Redash's frontend code (JavaScript, HTML, CSS) to identify all sources of content (scripts, styles, images, fonts, etc.). Pay close attention to any third-party libraries used.
    2. Develop a Redash-Specific CSP: Create a CSP that is tailored to Redash's specific needs. Start with a very restrictive policy (e.g., default-src 'none') and gradually add directives to allow only the necessary resources. Consider using a tool to help generate the CSP.
    3. Integrate into Redash: Modify Redash's code to include the CSP as an HTTP header (Content-Security-Policy). This typically involves modifying the server-side code that generates the HTML responses.
    4. Test within Redash: Thoroughly test the CSP within Redash using a browser's developer tools. Use the Content-Security-Policy-Report-Only header during testing to identify violations without blocking resources. Address any issues by adjusting the policy.
    5. Reporting URI (Redash Integration): Configure a reporting URI within Redash to collect CSP violation reports. This might involve setting up a dedicated endpoint within Redash or using an external service. Analyze these reports to identify and fix any remaining issues.

  • Threats Mitigated:

    • Cross-Site Scripting (XSS) (Critical): A well-crafted CSP, implemented within Redash, is a powerful defense against XSS attacks targeting the Redash web interface.

  • Impact:

    • Cross-Site Scripting (XSS): Risk reduced from Critical to Low (with a well-crafted and maintained CSP).

  • Currently Implemented:

    • Not implemented.

  • Missing Implementation:

    • Complete implementation of a comprehensive CSP, including code modifications within Redash, testing, and integration of a reporting URI.

Mitigation Strategy: Secure Redash Configuration

  • Description:

    1. Review .env (or Environment Variables): Carefully review all settings in Redash's configuration file (.env or the environment variables used).
    2. REDASH_COOKIE_SECRET and REDASH_SECRET_KEY: Ensure these are set to strong, randomly generated values. Never use default or easily guessable values. These secrets are crucial for protecting session cookies and other sensitive data.
    3. REDASH_ENFORCE_HTTPS: Set this to true if you are using HTTPS (which you should be). This enforces HTTPS connections to Redash.
    4. REDASH_GOOGLE_CLIENT_ID and REDASH_GOOGLE_CLIENT_SECRET (if using Google OAuth): Ensure these are properly configured and kept secret.
    5. Other Settings: Review all other settings for potential security implications. Disable any unused features or data source types.
    6. Regular Review: Periodically review the Redash configuration to ensure it remains secure.

  • Threats Mitigated:

    • Session Hijacking (High): Strong REDASH_COOKIE_SECRET and REDASH_SECRET_KEY values protect against session hijacking.
    • CSRF (Cross-Site Request Forgery) (High): These secrets also help protect against CSRF attacks.
    • Unauthorized Access (Medium): Proper configuration helps prevent unauthorized access to Redash.

  • Impact:

    • Session Hijacking: Risk reduced from High to Low.
    • CSRF: Risk reduced from High to Low.
    • Unauthorized Access: Risk reduced from Medium to Low.

  • Currently Implemented:

    • Partially implemented. Some security-related settings are configured, but a comprehensive review and hardening of all settings is needed.

  • Missing Implementation:

    • Thorough review and hardening of all Redash configuration settings.
    • Regular, scheduled reviews of the configuration.

Mitigation Strategy: Scheduled Queries and Alerts Review (Redash-Specific)

  • Description:

    1. Access Redash's Scheduled Queries: Within the Redash UI, navigate to the section that lists all scheduled queries and alerts.
    2. Review Each Entry: For each scheduled query and alert:
      • Verify that it is still needed.
      • Confirm that the query logic is correct and does not contain any unintended actions.
      • Check the schedule and ensure it is appropriate.
      • Review the alert destinations (e.g., email addresses, Slack channels) and ensure they are still valid and secure.
    3. Disable/Delete Unnecessary Entries: Disable or delete any scheduled queries or alerts that are no longer needed.
    4. Document Changes: Document any changes made to scheduled queries or alerts, including the reason for the change.
    5. Regularly review: Regularly (e.g. monthly) review all scheduled queries.

  • Threats Mitigated:

    • Data Exfiltration (Medium): Prevents scheduled queries from being used to exfiltrate data without authorization.
    • Resource Exhaustion (Low): Prevents unnecessary queries from consuming resources.
    • Outdated Alerts (Low): Ensures that alerts are sent to the correct recipients and are still relevant.

  • Impact:

    • Data Exfiltration: Risk reduced from Medium to Low.
    • Resource Exhaustion: Risk reduced from Low to Negligible.
    • Outdated Alerts: Risk reduced from Low to Negligible.

  • Currently Implemented:

    • Not implemented. No formal process for reviewing scheduled queries.

  • Missing Implementation:

    • Implementation of a regular review process for all scheduled queries and alerts within Redash.