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Attack Tree Analysis for friendsofphp/goutte

Objective: Compromise Application Using Goutte by Exploiting Goutte-Specific Vulnerabilities (Focused on High-Risk Paths)

Attack Tree Visualization

Compromise Application Using Goutte [CRITICAL NODE] ├───[AND] Exploit Goutte Functionality [CRITICAL NODE] │ ├───[OR] 1. Exploit URL Handling Vulnerabilities [HIGH RISK PATH] [CRITICAL NODE] │ │ ├─── 1.1. Server-Side Request Forgery (SSRF) via Goutte [HIGH RISK PATH] [CRITICAL NODE] │ │ │ └───[AND] 1.1.1. Application allows user-controlled URLs to Goutte [CRITICAL NODE] │ │ │ ├─── 1.1.1.1. Direct User Input in client->request() [HIGH RISK PATH] │ │ │ └─── 1.1.2. Goutte fetches internal resources [HIGH RISK PATH] │ │ │ ├─── 1.1.2.1. Access internal APIs [HIGH RISK PATH] │ ├───[OR] 2. Exploit HTML/XML Parsing Vulnerabilities [CRITICAL NODE] │ │ ├─── 2.2. Vulnerabilities in Underlying Parsers (Symfony BrowserKit/CSS Selector) [HIGH RISK PATH] [CRITICAL NODE] │ │ │ └───[AND] 2.2.1. Exploit known or zero-day vulnerabilities in Symfony components used by Goutte [HIGH RISK PATH] [CRITICAL NODE] │ │ │ ├─── 2.2.1.1. Code Execution via Parser Vulnerabilities (e.g., in CSS selector parsing, HTML parsing) [HIGH RISK PATH] ├───[AND] Exploit Dependencies of Goutte [HIGH RISK PATH] [CRITICAL NODE] │ ├───[OR] 6. Vulnerabilities in Symfony BrowserKit Component [HIGH RISK PATH] [CRITICAL NODE] │ │ ├─── 6.1. Exploit known vulnerabilities in symfony/browser-kit [HIGH RISK PATH] [CRITICAL NODE] │ │ │ └───[AND] 6.1.1. Application uses vulnerable version of symfony/browser-kit [CRITICAL NODE] │ │ │ ├─── 6.1.1.1. Check for publicly disclosed vulnerabilities and exploits for the used version [HIGH RISK PATH] │ │ │ └─── 6.1.1.2. Attempt to trigger known vulnerabilities through crafted requests or inputs processed by Goutte [HIGH RISK PATH] │ ├───[OR] 7. Vulnerabilities in Symfony CSS Selector Component [HIGH RISK PATH] [CRITICAL NODE] │ │ ├─── 7.1. Exploit known vulnerabilities in symfony/css-selector [HIGH RISK PATH] [CRITICAL NODE] │ │ │ └───[AND] 7.1.1. Application uses vulnerable version of symfony/css-selector [CRITICAL NODE] │ │ │ ├─── 7.1.1.1. Check for publicly disclosed vulnerabilities and exploits for the used version [HIGH RISK PATH] │ │ │ └─── 7.1.1.2. Attempt to trigger known vulnerabilities through crafted CSS selectors used by Goutte [HIGH RISK PATH]

Attack Tree Path: 1. Exploit URL Handling Vulnerabilities [HIGH RISK PATH] [CRITICAL NODE]

  • Attack Vector: Exploiting weaknesses in how the application handles URLs passed to Goutte, specifically focusing on Server-Side Request Forgery (SSRF).
  • Impact: High - Potential for accessing internal resources, sensitive data, and internal APIs, leading to significant compromise.
  • Actionable Insights:

    • Input Validation and Sanitization: Strictly validate and sanitize all URLs before passing them to Goutte.

    • Allowlisting: Use allowlists of permitted domains or URL patterns.

    • Avoid Direct User Input: Never directly use user-provided URLs without thorough validation.

    • 1.1. Server-Side Request Forgery (SSRF) via Goutte [HIGH RISK PATH] [CRITICAL NODE]:

      • Attack Vector: Forcing Goutte to make requests to unintended internal resources.
      • Impact: High - Access to internal APIs, services, or files.
      • Actionable Insights:

        • URL Validation is Crucial: Implement robust URL validation and sanitization.

        • Network Segmentation: Network segmentation can limit the impact of SSRF by restricting access to internal resources from the application server.

        • 1.1.1. Application allows user-controlled URLs to Goutte [CRITICAL NODE]:

          • Attack Vector: Application design flaw where user input directly or indirectly controls URLs for Goutte requests.
          • Impact: High - Direct pathway to SSRF.
          • Actionable Insights:

            • Code Review: Review code to identify all instances where user input influences Goutte's URL requests.

            • Secure Design: Redesign application logic to avoid direct user control over Goutte URLs.

            • 1.1.1.1. Direct User Input in client->request() [HIGH RISK PATH]:

              • Attack Vector: Application directly uses user-provided input as the URL in Goutte's client->request() method.
              • Impact: High - Easily exploitable SSRF vulnerability.
              • Actionable Insights:
                • Eliminate Direct Usage: Never directly use user input in client->request() without validation.
                • Parameterization: If possible, use parameterized URLs or predefined URL structures.

            • 1.1.2. Goutte fetches internal resources [HIGH RISK PATH]:

              • Attack Vector: SSRF leading to access of internal resources.
              • Impact: High - Information disclosure, further exploitation.
              • Actionable Insights:

                • Network Policies: Implement network policies to restrict outbound traffic from the application server.

                • Principle of Least Privilege: Limit the application's access to only necessary external and internal resources.

                • 1.1.2.1. Access internal APIs [HIGH RISK PATH]:

                  • Attack Vector: SSRF used to access internal APIs.
                  • Impact: High - Data breach, manipulation of internal systems.
                  • Actionable Insights:
                    • API Authentication: Implement strong authentication and authorization for internal APIs.
                    • API Rate Limiting: Rate limit API access to mitigate DoS and brute-force attempts.

Attack Tree Path: 2. Exploit HTML/XML Parsing Vulnerabilities [CRITICAL NODE]

  • Attack Vector: Exploiting vulnerabilities in the HTML/XML parsers used by Goutte, specifically focusing on vulnerabilities in underlying Symfony components.
  • Impact: Critical - Potential for code execution, information disclosure, or denial of service.
  • Actionable Insights:

    • Dependency Management and Security Updates (Crucial): Regularly update Goutte and its Symfony dependencies.

    • Vulnerability Monitoring: Monitor security advisories for Symfony components and Goutte.

    • 2.2. Vulnerabilities in Underlying Parsers (Symfony BrowserKit/CSS Selector) [HIGH RISK PATH] [CRITICAL NODE]:

      • Attack Vector: Exploiting known or zero-day vulnerabilities in Symfony components used by Goutte for parsing.
      • Impact: Critical - Code execution, information disclosure.
      • Actionable Insights:

        • Patch Management: Prioritize patching vulnerabilities in Symfony components.

        • Web Application Firewall (WAF): Consider using a WAF to detect and block exploits targeting parser vulnerabilities.

        • 2.2.1. Exploit known or zero-day vulnerabilities in Symfony components used by Goutte [HIGH RISK PATH] [CRITICAL NODE]:

          • Attack Vector: Targeting specific vulnerabilities in symfony/browser-kit or symfony/css-selector.
          • Impact: Critical - System compromise.
          • Actionable Insights:

            • Proactive Updates: Adopt a proactive approach to dependency updates.

            • Security Audits: Conduct regular security audits and penetration testing to identify potential vulnerabilities.

            • 2.2.1.1. Code Execution via Parser Vulnerabilities (e.g., in CSS selector parsing, HTML parsing) [HIGH RISK PATH]:

              • Attack Vector: Crafting malicious input to trigger code execution through parser vulnerabilities.
              • Impact: Critical - Full system compromise.
              • Actionable Insights:
                • Input Sanitization (Defense in Depth): While updates are primary, input sanitization can provide an additional layer of defense.
                • Runtime Application Self-Protection (RASP): Consider RASP solutions for real-time vulnerability detection and prevention.

Attack Tree Path: 3. Exploit Dependencies of Goutte [HIGH RISK PATH] [CRITICAL NODE]

  • Attack Vector: Exploiting vulnerabilities within Goutte's dependencies, specifically symfony/browser-kit and symfony/css-selector.
  • Impact: Critical - Inherited vulnerabilities can lead to code execution, information disclosure, or denial of service.
  • Actionable Insights:

    • Dependency Scanning: Implement automated dependency scanning tools to detect vulnerable dependencies.

    • Composer Security Audit: Utilize Composer's built-in security audit features.

    • 6. Vulnerabilities in Symfony BrowserKit Component [HIGH RISK PATH] [CRITICAL NODE]:

      • Attack Vector: Exploiting vulnerabilities specifically in symfony/browser-kit.
      • Impact: Critical - Code execution, information disclosure.
      • Actionable Insights:

        • BrowserKit Updates: Keep symfony/browser-kit updated to the latest secure version.

        • Security Monitoring: Subscribe to Symfony security advisories for browser-kit.

        • 6.1. Exploit known vulnerabilities in symfony/browser-kit [HIGH RISK PATH] [CRITICAL NODE]:

          • Attack Vector: Targeting known, publicly disclosed vulnerabilities in symfony/browser-kit.
          • Impact: Critical - Exploitable vulnerabilities are easier to target.
          • Actionable Insights:

            • Patch Immediately: Apply security patches for symfony/browser-kit as soon as they are released.

            • Version Pinning (with caution): While updates are crucial, consider version pinning in conjunction with regular updates to manage dependency changes.

            • 6.1.1. Application uses vulnerable version of symfony/browser-kit [CRITICAL NODE]:

              • Attack Vector: Application is running a version of symfony/browser-kit with known vulnerabilities.
              • Impact: Critical - Direct exposure to known exploits.
              • Actionable Insights:

                • Version Audit: Regularly audit the versions of symfony/browser-kit in use.

                • Automated Updates: Implement automated dependency update processes.

                • 6.1.1.1. Check for publicly disclosed vulnerabilities and exploits for the used version [HIGH RISK PATH]:

                  • Action: Regularly check security databases and advisories for vulnerabilities affecting the used version of symfony/browser-kit.

                • 6.1.1.2. Attempt to trigger known vulnerabilities through crafted requests or inputs processed by Goutte [HIGH RISK PATH]:

                  • Action: Security testing should include attempts to trigger known vulnerabilities in symfony/browser-kit using crafted inputs relevant to Goutte's usage.

    • 7. Vulnerabilities in Symfony CSS Selector Component [HIGH RISK PATH] [CRITICAL NODE]:

      • Attack Vector: Exploiting vulnerabilities specifically in symfony/css-selector.
      • Impact: Critical - Code execution, information disclosure.
      • Actionable Insights:

        • CSS Selector Updates: Keep symfony/css-selector updated to the latest secure version.

        • Security Monitoring: Subscribe to Symfony security advisories for css-selector.

        • 7.1. Exploit known vulnerabilities in symfony/css-selector [HIGH RISK PATH] [CRITICAL NODE]:

          • Attack Vector: Targeting known, publicly disclosed vulnerabilities in symfony/css-selector.
          • Impact: Critical - Exploitable vulnerabilities are easier to target.
          • Actionable Insights:

            • Patch Immediately: Apply security patches for symfony/css-selector as soon as they are released.

            • 7.1.1. Application uses vulnerable version of symfony/css-selector [CRITICAL NODE]:

              • Attack Vector: Application is running a version of symfony/css-selector with known vulnerabilities.
              • Impact: Critical - Direct exposure to known exploits.
              • Actionable Insights:

                • Version Audit: Regularly audit the versions of symfony/css-selector in use.

                • Automated Updates: Implement automated dependency update processes.

                • 7.1.1.1. Check for publicly disclosed vulnerabilities and exploits for the used version [HIGH RISK PATH]:

                  • Action: Regularly check security databases and advisories for vulnerabilities affecting the used version of symfony/css-selector.

                • 7.1.1.2. Attempt to trigger known vulnerabilities through crafted CSS selectors used by Goutte [HIGH RISK PATH]:

                  • Action: Security testing should include attempts to trigger known vulnerabilities in symfony/css-selector using crafted CSS selectors relevant to Goutte's usage.