CVE-2024-33749
📋 TL;DR
DedeCMS V5.7.114 contains an improper authorization vulnerability in mail_file_manage.php that allows attackers to delete any file on the server. This affects all DedeCMS installations running the vulnerable version. Attackers can exploit this to delete critical system files, configuration files, or website content.
💻 Affected Systems
- DedeCMS
📦 What is this software?
Dedecms by Dedecms
⚠️ 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
Website defacement or disruption by deleting web content files, configuration files, or database files, causing service downtime.
If Mitigated
Limited impact if proper file permissions and access controls are implemented, restricting deletion to non-critical directories.
🎯 Exploit Status
Exploitation requires some level of access but is technically simple once access is obtained. The vulnerability is publicly documented with proof-of-concept details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check for official patch from DedeCMS developers
2. If patch is released, download and apply according to vendor instructions
3. Verify the fix by testing the vulnerable functionality
🔧 Temporary Workarounds
Remove vulnerable file
linuxDelete or rename the vulnerable mail_file_manage.php file to prevent exploitation
mv mail_file_manage.php mail_file_manage.php.bak
rm mail_file_manage.php
Restrict file permissions
linuxSet strict file permissions on critical directories to prevent unauthorized deletion
chmod 755 /path/to/dedecms
chmod 644 /path/to/dedecms/*.php
🧯 If You Can't Patch
- Implement strict access controls and authentication requirements for administrative functions
- Deploy web application firewall (WAF) rules to block requests to mail_file_manage.php with delete parameters
🔍 How to Verify
Check if Vulnerable:
Check if DedeCMS version is 5.7.114 and if mail_file_manage.php exists in the installation directoryCheck Version:
Check DedeCMS version in admin panel or examine version files in installation directoryVerify Fix Applied:
Test if file deletion functionality through mail_file_manage.php is properly restricted or if the file has been removed/renamed📡 Detection & Monitoring
Log Indicators:
- HTTP requests to mail_file_manage.php with delete parameters
- File deletion events in system logs
- Unauthorized access attempts to administrative functions
Network Indicators:
- POST requests to mail_file_manage.php with file path parameters
- Unusual file deletion patterns from web server
SIEM Query:
source="web_server" AND uri="*mail_file_manage.php*" AND (method="POST" OR parameters="*delete*" OR parameters="*file*=")