CVE-2024-11211
📋 TL;DR
A critical vulnerability in EyouCMS allows unrestricted file uploads via the Website Logo Handler component, enabling attackers to upload malicious files remotely. This affects EyouCMS versions up to 1.6.7, potentially leading to remote code execution. Organizations using vulnerable EyouCMS installations are at risk.
💻 Affected Systems
- EyouCMS
📦 What is this software?
Eyoucms by Eyoucms
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Webshell deployment allowing persistent access, data exfiltration, and further exploitation of the server.
If Mitigated
File uploads blocked or sanitized, preventing malicious file execution while maintaining legitimate functionality.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making this easily weaponizable by attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a version beyond 1.6.7 if released, or apply workarounds.
🔧 Temporary Workarounds
Restrict File Upload Types
allConfigure web server or application to only allow specific image file types (e.g., .jpg, .png) for logo uploads.
# Example for Apache: Add to .htaccess
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps|php8|inc|exe|pl|sh|py|rb|js|jsp|asp|aspx|html|htm|xml)$">
Order allow,deny
Deny from all
</FilesMatch>
Disable Logo Upload Feature
allTemporarily disable the Website Logo Handler component in EyouCMS admin panel.
🧯 If You Can't Patch
- Implement strict file upload validation on the web server level.
- Use a Web Application Firewall (WAF) to block malicious upload attempts.
🔍 How to Verify
Check if Vulnerable:
Check EyouCMS version in admin panel or via file system; if version is 1.6.7 or lower, it is vulnerable.Check Version:
# Check version in EyouCMS admin panel or look for version info in files like /eyou/version.txtVerify Fix Applied:
Test logo upload functionality with a malicious file (e.g., .php) to ensure it is blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to logo handler endpoints
- Uploads of non-image file types (e.g., .php, .exe)
Network Indicators:
- HTTP POST requests to upload endpoints with suspicious file extensions
SIEM Query:
source="web_logs" AND (url_path="/eyou/logo_upload" OR url_path LIKE "%/logo%") AND (file_extension="php" OR file_extension="exe" OR file_extension="sh")