CVE-2024-46446
📋 TL;DR
Mecha CMS 3.0.0 has a directory traversal vulnerability that allows attackers to bypass authentication checks via manipulated cookies and URIs. This enables arbitrary file deletion and potential website takeover. All users running Mecha CMS 3.0.0 are affected.
💻 Affected Systems
- Mecha CMS
📦 What is this software?
Mecha by Mecha Cms
⚠️ Risk & Real-World Impact
Worst Case
Complete website compromise including data destruction, defacement, and potential server takeover if critical system files are deleted.
Likely Case
Website defacement, data loss from deleted files, and service disruption.
If Mitigated
Limited impact if file permissions restrict deletion to non-critical files and regular backups exist.
🎯 Exploit Status
Exploit details and proof-of-concept code are publicly available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://mecha-cmscom.com
Restart Required: No
Instructions:
Check vendor website for security updates. If no patch exists, consider upgrading to a newer major version or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to reject directory traversal sequences in cookies and URI parameters.
Add input sanitization in application code to filter '../', '..\', and similar traversal patterns
File Permission Restriction
linuxSet strict file permissions to prevent deletion of critical files.
chmod 644 for web files, chmod 755 for directories, restrict write access to essential files only
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block directory traversal patterns in requests
- Isolate the CMS instance in a restricted network segment with minimal file system access
🔍 How to Verify
Check if Vulnerable:
Check if running Mecha CMS version 3.0.0. Test with controlled directory traversal attempts using proof-of-concept methods.Check Version:
Check CMS admin panel or configuration files for version informationVerify Fix Applied:
Verify that directory traversal attempts are blocked and file deletion via manipulated parameters is prevented.📡 Detection & Monitoring
Log Indicators:
- Unusual file deletion events
- Requests containing '../' or similar patterns in cookies/URIs
- Failed authentication attempts with manipulated parameters
Network Indicators:
- POST requests with suspicious parameter values
- Unusual cookie patterns in HTTP headers
SIEM Query:
source="web_logs" AND (uri="*../*" OR cookie="*../*") AND method="POST"