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Threat Model Analysis for eggjs/egg

Threat: Unpatched Vulnerability in Egg.js Core (e.g., egg-security)

  • Description: An attacker exploits a known but unpatched vulnerability in the core Egg.js framework or a core plugin like egg-security. The attacker might craft a malicious request that triggers the vulnerability, leading to remote code execution (RCE) or other exploits. For example, a flaw in how egg-security handles CSRF tokens could allow an attacker to bypass CSRF protection.
    • Impact: Complete system compromise, data breach, unauthorized access to sensitive data and functionality, denial of service.
    • Egg Component Affected: Core framework modules (e.g., egg, egg-core), core plugins (e.g., egg-security, egg-view), potentially any component relying on the vulnerable code.
    • Risk Severity: Critical
    • Mitigation Strategies:
      • Immediate Patching: Apply security updates from the Egg.js project immediately upon release. Prioritize security updates.
      • Automated Vulnerability Scanning: Integrate vulnerability scanning into the CI/CD pipeline.
      • Web Application Firewall (WAF): Use a WAF to help mitigate known exploits (temporary measure).
      • Monitoring: Implement robust logging and monitoring to detect suspicious activity.

Threat: Malicious Plugin Installation

  • Description: An attacker publishes a malicious plugin to the npm registry (typosquatting or compromised legitimate plugin). A developer unknowingly installs it. The plugin could contain a backdoor, steal credentials, or perform other malicious actions.
    • Impact: Code execution on the server, data exfiltration, lateral movement, potential compromise of other systems.
    • Egg Component Affected: Plugin system, any application code interacting with the malicious plugin.
    • Risk Severity: Critical
    • Mitigation Strategies:
      • Plugin Verification: Carefully verify the plugin's author, source, and download statistics before installation.
      • Code Review (Plugins): If feasible, review the plugin's source code before installation.
      • Dependency Locking: Use a package-lock.json or yarn.lock file.
      • Limited Plugin Use: Minimize the number of third-party plugins.

Threat: Vulnerability in a Third-Party Plugin

  • Description: A legitimate, but vulnerable, third-party Egg.js plugin is used. The attacker exploits a vulnerability in the plugin.
    • Impact: Varies, but could range from data leakage to complete system compromise.
    • Egg Component Affected: Plugin system, the specific vulnerable plugin, and any application code interacting with it.
    • Risk Severity: High to Critical (depending on the plugin and vulnerability)
    • Mitigation Strategies:
      • Regular Plugin Updates: Keep all plugins updated.
      • Dependency Auditing: Use npm audit or yarn audit.
      • Plugin Selection: Choose well-maintained plugins from reputable sources.
      • Monitoring Plugin Activity: Monitor plugins for unusual activity.

Threat: Misconfigured CSRF Protection (egg-security)

  • Description: The egg-security plugin's CSRF protection is disabled, misconfigured (incorrect token secret, weak generation), or bypassed. An attacker can forge requests on behalf of users.
    • Impact: Unauthorized actions performed on behalf of users (changing passwords, making purchases, deleting data).
    • Egg Component Affected: egg-security plugin, specifically the CSRF protection middleware.
    • Risk Severity: High
    • Mitigation Strategies:
      • Enable and Test CSRF: Ensure CSRF protection is enabled and properly configured.
      • Regular Testing: Regularly test the CSRF protection mechanism.
      • Token Secret Management: Store the CSRF token secret securely (e.g., in environment variables).

Threat: Insecure Direct Object Reference (IDOR) via ctx.params

  • Description: The application uses values from ctx.params (e.g., user IDs, resource IDs) directly in database queries or other operations without proper authorization checks. An attacker can modify these parameters to access resources they should not have access to.
    • Impact: Unauthorized access to data, potential for data modification or deletion.
    • Egg Component Affected: Context (ctx), Router (how parameters are extracted), Controller (how parameters are used), potentially Service layer (if interacting with data).
    • Risk Severity: High
    • Mitigation Strategies:
      • Authorization Checks: Implement robust authorization checks before accessing any resource based on user-provided parameters.
      • Input Validation: Validate and sanitize all input from ctx.params.
      • Object-Level Permissions: Implement object-level permissions.