CVE-2020-24407
📋 TL;DR
This CVE describes an unsafe file upload vulnerability in Magento that allows authenticated administrators to upload malicious files, potentially leading to arbitrary code execution. The vulnerability affects Magento 2.4.0, 2.3.5p1, and earlier versions. Attackers with administrative access to specific components can exploit this to compromise the server.
💻 Affected Systems
- Magento Commerce
- Magento Open Source
📦 What is this software?
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise with complete administrative control, data theft, and potential lateral movement to other systems.
Likely Case
Unauthorized file upload leading to web shell installation and limited code execution within the Magento application context.
If Mitigated
Limited impact with proper file upload validation and restricted administrative access.
🎯 Exploit Status
Exploitation requires administrative credentials but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.1 and 2.3.6
Vendor Advisory: https://helpx.adobe.com/security/products/magento/apsb20-59.html
Restart Required: No
Instructions:
1. Backup your Magento installation and database. 2. Update to Magento 2.4.1 or 2.3.6 via Composer or Magento Marketplace. 3. Clear cache and recompile if necessary. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Restrict Administrative Access
allLimit access to System/Data and Transfer/Import components to only essential administrators.
Implement File Upload Restrictions
allConfigure web server or application-level restrictions on file uploads in affected components.
🧯 If You Can't Patch
- Implement strict access controls and monitor administrative user activity.
- Deploy web application firewall rules to block suspicious file upload patterns.
🔍 How to Verify
Check if Vulnerable:
Check Magento version via admin panel or by examining app/etc/env.php for version information.Check Version:
php bin/magento --versionVerify Fix Applied:
Confirm Magento version is 2.4.1 or higher, or 2.3.6 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to import/data directories
- Administrative user performing unexpected import operations
Network Indicators:
- HTTP POST requests to import/data endpoints with file uploads
SIEM Query:
source="magento_access.log" AND (uri_path="/admin/*/import" OR uri_path="/admin/*/data") AND method="POST" AND status=200