CVE-2024-31551
📋 TL;DR
This CVE describes a directory traversal vulnerability in cmseasy v7.7.7.9 that allows attackers to delete arbitrary files on the server via crafted GET requests. Attackers can exploit this to delete critical system files, configuration files, or application data. All systems running the vulnerable version of cmseasy are affected.
💻 Affected Systems
- cmseasy
📦 What is this software?
Cmseasy by Cmseasy
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, leading to service disruption, data loss, or enabling further attacks by removing security controls.
Likely Case
Application disruption through deletion of configuration files, website defacement by removing web content, or data loss through deletion of database or user files.
If Mitigated
Limited impact if proper file permissions and web server configurations restrict access to sensitive directories.
🎯 Exploit Status
Exploitation requires access to the admin interface but uses simple directory traversal techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or apply workarounds.
🔧 Temporary Workarounds
Restrict admin access
allLimit access to the admin interface to trusted IP addresses only
# In .htaccess or web server config
Order deny,allow
Deny from all
Allow from 192.168.1.0/24
File permission hardening
linuxSet restrictive permissions on sensitive directories and files
chmod 644 lib/admin/image.admin.php
chmod 755 lib/admin/
chmod 600 config files
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the vulnerable system
- Deploy web application firewall (WAF) with directory traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Check if file exists: lib/admin/image.admin.php in cmseasy installation directoryCheck Version:
Check cmseasy version in admin panel or configuration filesVerify Fix Applied:
Test with controlled directory traversal attempts to verify file deletion is prevented📡 Detection & Monitoring
Log Indicators:
- GET requests to lib/admin/image.admin.php with ../ patterns
- File deletion errors in web server logs
- Unauthorized access attempts to admin interface
Network Indicators:
- HTTP requests with directory traversal sequences (../) to admin endpoints
- Unusual file deletion patterns from web server
SIEM Query:
source="web_server" AND uri="*lib/admin/image.admin.php*" AND (uri="*../*" OR method="DELETE")