CVE-2024-25414
📋 TL;DR
CVE-2024-25414 is a critical arbitrary file upload vulnerability in CSZ CMS v1.3.0 that allows attackers to upload malicious Zip files containing PHP shells to the /admin/upgrade endpoint, leading to remote code execution. This affects all systems running CSZ CMS v1.3.0 with the vulnerable upgrade functionality enabled. Attackers can gain complete control of affected web servers.
💻 Affected Systems
- CSZ CMS
📦 What is this software?
Csz Cms by Cszcms
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Webshell upload leading to website defacement, credential harvesting, and use as a pivot point for further attacks.
If Mitigated
Limited impact with proper file upload restrictions, but still poses significant risk if other security controls fail.
🎯 Exploit Status
Exploit requires admin credentials or ability to bypass authentication. Multiple public proof-of-concept exploits are available showing how to craft malicious Zip files containing PHP shells.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - No official patch from vendor identified
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Consider migrating to alternative CMS or implementing strict workarounds.
🔧 Temporary Workarounds
Disable Admin Upgrade Endpoint
allBlock access to the vulnerable /admin/upgrade endpoint using web server configuration or firewall rules.
# Apache: RewriteRule ^/admin/upgrade - [F]
# Nginx: location /admin/upgrade { deny all; }
Restrict File Upload Types
allImplement strict file type validation for Zip uploads and disable PHP execution in upload directories.
# .htaccess for Apache: php_flag engine off
# Nginx: location ~ \.php$ { deny all; }
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to restrict access to admin interface
- Deploy web application firewall (WAF) with rules to detect and block malicious file upload patterns
🔍 How to Verify
Check if Vulnerable:
Check if running CSZ CMS v1.3.0 and if /admin/upgrade endpoint accepts Zip file uploads without proper validation.Check Version:
Check CMS configuration files or admin dashboard for version informationVerify Fix Applied:
Test if Zip file uploads to /admin/upgrade are properly restricted and if malicious PHP files cannot be executed.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /admin/upgrade
- Large Zip file uploads from unexpected IPs
- PHP file execution in upload directories
Network Indicators:
- POST requests to /admin/upgrade with Zip file content
- Subsequent requests to uploaded PHP files
SIEM Query:
source="web_logs" AND (uri="/admin/upgrade" AND method="POST" AND content_type="application/zip")