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Mitigation Strategies Analysis for rocketchat/rocket.chat

Mitigation Strategy: Regular Permission Audits and Principle of Least Privilege (PoLP) within Rocket.Chat

  • Description:

    1. Schedule: Establish a recurring schedule (e.g., monthly, quarterly) for Rocket.Chat permission audits.
    2. Identify Roles: List all Rocket.Chat user roles (default and custom).
    3. Document Permissions: For each Rocket.Chat role, document the specific permissions granted within the Rocket.Chat interface (e.g., read messages, send messages, create channels, manage users, access specific APIs, use specific integrations).
    4. Review Assignments: Review which users are assigned to each Rocket.Chat role. Identify users with roles broader than their responsibilities within Rocket.Chat.
    5. Adjust Permissions: Adjust each user's Rocket.Chat role or permissions to the absolute minimum required. Use Rocket.Chat's built-in permission management system. Focus on granular control within Rocket.Chat's features.
    6. Automate (Rocket.Chat API): Develop scripts using the Rocket.Chat API to automate parts of the audit:
      • List users and their Rocket.Chat roles.
      • Check for users with specific high-privilege Rocket.Chat permissions.
      • Generate reports of Rocket.Chat permission assignments.
    7. Document Changes: Document all changes to Rocket.Chat roles and permissions, including the rationale.
    8. Repeat: Conduct the audit on the defined schedule.

  • Threats Mitigated:

    • Unauthorized Access to Rocket.Chat Channels/Messages (High Severity): Prevents users from accessing channels or messages they shouldn't within Rocket.Chat.
    • Unauthorized Rocket.Chat Administrative Actions (Critical Severity): Limits the ability to perform administrative actions within Rocket.Chat (e.g., deleting users, changing Rocket.Chat settings, installing apps).
    • Privilege Escalation (within Rocket.Chat) (High Severity): Reduces the likelihood of exploiting Rocket.Chat vulnerabilities to gain higher Rocket.Chat privileges.
    • Data Modification/Deletion (within Rocket.Chat) (High Severity): Prevents unauthorized modification/deletion of messages, files, or data within Rocket.Chat.

  • Impact:

    • Unauthorized Access (Rocket.Chat): Significantly reduces the risk.
    • Unauthorized Administrative Actions (Rocket.Chat): Significantly reduces the risk.
    • Privilege Escalation (Rocket.Chat): Moderately reduces the risk.
    • Data Modification/Deletion (Rocket.Chat): Significantly reduces the risk.

  • Currently Implemented: (Example: Partially implemented. Manual audits are performed quarterly. Basic Rocket.Chat role assignments are reviewed, but custom role permissions within Rocket.Chat are not thoroughly audited.)

  • Missing Implementation: (Example: Automation using the Rocket.Chat API is missing. Detailed review of custom Rocket.Chat role permissions is inconsistent. No scripting to identify overly permissive Rocket.Chat roles.)

Mitigation Strategy: Third-Party Rocket.Chat App Vetting and Management

  • Description:

    1. Policy: Create a policy for installing and managing third-party Rocket.Chat apps.
    2. Request Process: Implement a formal request process for new Rocket.Chat apps. Justify the app's need and intended use within Rocket.Chat.
    3. Vetting (Before Installation in Rocket.Chat):
      • Source Code Review (if open-source): Examine the Rocket.Chat app's code for vulnerabilities (XSS, insecure data handling within the Rocket.Chat context).
      • Reputation Check: Research the app developer and check for security issues.
      • Permission Analysis: Review the permissions requested by the Rocket.Chat app. Question excessive or unnecessary permissions within Rocket.Chat.
      • Sandbox Testing (Rocket.Chat Test Instance): Install the app in a test Rocket.Chat instance to observe its behavior.
    4. Approval: Require approval before installing any app in the production Rocket.Chat environment.
    5. Inventory: Maintain an inventory of all installed Rocket.Chat apps, including versions and permissions.
    6. Regular Updates: Regularly update Rocket.Chat apps to the latest versions. Subscribe to security notifications.
    7. Disable/Remove: Disable or remove unused Rocket.Chat apps.
    8. Monitoring (Rocket.Chat Logs/API): Monitor app behavior for suspicious activity using Rocket.Chat logs and the API.

  • Threats Mitigated:

    • Compromise via Vulnerable Rocket.Chat App (Critical Severity): Reduces the risk of exploiting vulnerabilities in Rocket.Chat apps to gain access.
    • Data Exfiltration via Malicious Rocket.Chat App (Critical Severity): Prevents malicious Rocket.Chat apps from stealing data.
    • DoS via Rocket.Chat App (High Severity): Reduces the risk of apps causing DoS within Rocket.Chat.
    • Introduction of XSS/Other Vulnerabilities (via Rocket.Chat App) (High Severity): Prevents apps from introducing vulnerabilities into the Rocket.Chat environment.

  • Impact:

    • Compromise via Vulnerable App: Significantly reduces the risk.
    • Data Exfiltration: Significantly reduces the risk.
    • DoS via App: Moderately reduces the risk.
    • Introduction of XSS/Other Vulnerabilities: Significantly reduces the risk.

  • Currently Implemented: (Example: Basic vetting (reputation and permission analysis). No formal policy or request process.)

  • Missing Implementation: (Example: No source code review. No sandbox testing in a separate Rocket.Chat instance. No formal approval. App inventory not consistently maintained. Monitoring via Rocket.Chat logs/API is limited.)

Mitigation Strategy: Input Sanitization and Output Encoding (within Rocket.Chat and Custom Integrations) + Rocket.Chat-Specific CSP

  • Description:

    1. Identify Input Points (Rocket.Chat): Identify all points where user data enters Rocket.Chat, including:
      • Message input fields.
      • Custom Rocket.Chat integration inputs.
      • File uploads (handled by Rocket.Chat).
      • Rocket.Chat API endpoints.
      • Rocket.Chat profile fields.
    2. Sanitize Input (Rocket.Chat Functions): Sanitize user input using Rocket.Chat's built-in sanitization functions where available (e.g., for message content). For custom Rocket.Chat integrations, use robust sanitization libraries, paying close attention to how data interacts with Rocket.Chat.
    3. Encode Output (Rocket.Chat Context): Encode user-supplied data before displaying it within Rocket.Chat. Use appropriate encoding for the context (HTML, JavaScript, URL encoding) within the Rocket.Chat interface.
    4. Content Security Policy (CSP) - Rocket.Chat Specific:
      • Define Policy: Create a strict CSP tailored to your Rocket.Chat deployment. Define allowed sources for scripts, styles, etc., within the Rocket.Chat context.
      • Implement in Rocket.Chat: Configure Rocket.Chat to send the CSP headers. This might involve server configuration or Rocket.Chat settings.
      • Test (Rocket.Chat Interface): Test the CSP thoroughly within the Rocket.Chat interface to ensure it doesn't break legitimate functionality.
      • Monitor and Refine: Monitor for CSP violations and refine the policy.
    5. Regular Review: Regularly review and update sanitization, encoding, and the Rocket.Chat-specific CSP.

  • Threats Mitigated:

    • Cross-Site Scripting (XSS) (within Rocket.Chat) (High Severity): Prevents injecting malicious scripts into the Rocket.Chat interface.
    • HTML Injection (within Rocket.Chat) (High Severity): Prevents injecting malicious HTML into Rocket.Chat.
    • Code Injection (in custom Rocket.Chat integrations) (Critical Severity): Reduces code injection risks within custom Rocket.Chat integrations.

  • Impact:

    • XSS (Rocket.Chat): Significantly reduces the risk (with a well-configured CSP).
    • HTML Injection (Rocket.Chat): Significantly reduces the risk.
    • Code Injection (Rocket.Chat Integrations): Moderately reduces the risk.

  • Currently Implemented: (Example: Rocket.Chat's built-in sanitization is used. Basic output encoding. No Rocket.Chat-specific CSP.)

  • Missing Implementation: (Example: No comprehensive sanitization/encoding for custom Rocket.Chat integrations. No Content Security Policy (CSP) configured specifically for Rocket.Chat.)

Mitigation Strategy: Rocket.Chat Rate Limiting and Resource Quotas

  • Description:

    1. Identify Rate-Limited Actions (Rocket.Chat): Determine which Rocket.Chat actions should be rate-limited:
      • Message sending (per user, per channel within Rocket.Chat).
      • File uploads (size, frequency within Rocket.Chat).
      • Rocket.Chat API requests (per user, per IP).
      • User registrations (within Rocket.Chat).
      • Login attempts (to Rocket.Chat).
      • Search queries (within Rocket.Chat).
    2. Configure Rate Limits (Rocket.Chat Settings/API): Use Rocket.Chat's built-in rate limiting features or implement custom rate limiting using the Rocket.Chat API or middleware that interacts directly with Rocket.Chat.
    3. Resource Quotas (Rocket.Chat, if available): If Rocket.Chat provides resource quota features, implement them to limit resource consumption by users or channels within Rocket.Chat.
    4. Monitoring (Rocket.Chat Logs/API): Monitor rate limiting events and resource usage using Rocket.Chat logs and the API.
    5. Alerting: Configure alerts for excessive rate limiting violations or resource usage reported by Rocket.Chat.
    6. Review and Adjust: Regularly review and adjust rate limits and quotas based on observed usage and Rocket.Chat's performance.

  • Threats Mitigated:

    • Denial-of-Service (DoS) (against Rocket.Chat) (High Severity): Prevents overwhelming Rocket.Chat with requests.
    • Brute-Force Attacks (against Rocket.Chat accounts) (Medium Severity): Limits login attempts to Rocket.Chat.
    • Spam (within Rocket.Chat) (Medium Severity): Reduces spam within Rocket.Chat.
    • Resource Exhaustion (of Rocket.Chat) (High Severity): Prevents excessive resource consumption by Rocket.Chat.

  • Impact:

    • DoS (Rocket.Chat): Significantly reduces the risk.
    • Brute-Force Attacks (Rocket.Chat): Moderately reduces the risk.
    • Spam (Rocket.Chat): Moderately reduces the risk.
    • Resource Exhaustion (Rocket.Chat): Significantly reduces the risk.

  • Currently Implemented: (Example: Basic rate limiting for Rocket.Chat login attempts. No rate limiting for message sending or Rocket.Chat API requests.)

  • Missing Implementation: (Example: No comprehensive rate limiting for all relevant Rocket.Chat actions. No Rocket.Chat resource quotas.)

Mitigation Strategy: Secure Rocket.Chat Session Management

  • Description:

    1. Session Timeout (Rocket.Chat Settings): Configure short session timeouts within Rocket.Chat, especially for administrators.
    2. Secure Cookies (Rocket.Chat Configuration): Ensure Rocket.Chat is configured to use Secure and HttpOnly flags for all cookies.
    3. Session Invalidation (Rocket.Chat):
      • Logout: Ensure Rocket.Chat properly invalidates sessions on logout.
      • Password Change: Invalidate all active Rocket.Chat sessions on password change.
      • Admin Action: Use Rocket.Chat's admin features to manually invalidate user sessions.
    4. Two-Factor Authentication (2FA) / Multi-Factor Authentication (MFA) (Rocket.Chat):
      • Enable: Enable 2FA/MFA within Rocket.Chat.
      • Enforce: Enforce 2FA/MFA for all Rocket.Chat administrative users, and encourage it for all users.
    5. Session ID Regeneration (Verify in Rocket.Chat): Verify that Rocket.Chat regenerates the session ID after a successful login.
    6. Monitor Session Activity (Rocket.Chat Logs/API): Monitor for suspicious session activity using Rocket.Chat logs and the API.

  • Threats Mitigated:

    • Session Hijacking (of Rocket.Chat sessions) (High Severity): Reduces the risk of attackers stealing Rocket.Chat sessions.
    • Session Fixation (against Rocket.Chat) (High Severity): Prevents forcing users to use a known Rocket.Chat session ID.
    • Unauthorized Access via Stolen Credentials (to Rocket.Chat) (High Severity): 2FA/MFA mitigates risk even with stolen Rocket.Chat passwords.

  • Impact:

    • Session Hijacking (Rocket.Chat): Significantly reduces the risk.
    • Session Fixation (Rocket.Chat): Significantly reduces the risk.
    • Unauthorized Access (Rocket.Chat): Significantly reduces the risk (with 2FA/MFA).

  • Currently Implemented: (Example: Secure/HttpOnly flags set. Rocket.Chat session timeout is 1 hour. 2FA is available but not enforced in Rocket.Chat.)

  • Missing Implementation: (Example: Rocket.Chat session timeout could be shorter. 2FA not enforced for all Rocket.Chat users. Session ID regeneration not verified. Session activity monitoring via Rocket.Chat logs/API is limited.)