CVE-2024-40394
📋 TL;DR
Simple Library Management System v1.0 contains an arbitrary file upload vulnerability in ajax.php that allows attackers to upload malicious files. This can lead to remote code execution, affecting all systems running this vulnerable version without proper file upload restrictions.
💻 Affected Systems
- Simple Library Management System Project Using PHP/MySQL
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, data theft, and potential lateral movement within the network.
Likely Case
Webshell deployment leading to unauthorized access, data manipulation, and further exploitation of the server.
If Mitigated
File upload attempts are blocked or sanitized, preventing malicious file execution.
🎯 Exploit Status
Vulnerability is simple to exploit via direct HTTP requests to ajax.php with malicious file uploads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Remove or disable the vulnerable ajax.php file. 2. Implement proper file upload validation. 3. Consider replacing with a maintained library management system.
🔧 Temporary Workarounds
Disable vulnerable endpoint
linuxRemove or rename ajax.php to prevent exploitation
mv /path/to/ajax.php /path/to/ajax.php.disabled
Implement file upload restrictions
allAdd file type validation and size limits to ajax.php
🧯 If You Can't Patch
- Implement web application firewall rules to block malicious file uploads
- Restrict network access to the application and monitor for suspicious upload attempts
🔍 How to Verify
Check if Vulnerable:
Test if ajax.php accepts file uploads without proper validation by attempting to upload a test file.Check Version:
Check project documentation or version files for 'v1.0' indication.Verify Fix Applied:
Verify ajax.php is removed/disabled or that file uploads are properly validated and restricted.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to ajax.php
- POST requests with file uploads to ajax.php
Network Indicators:
- HTTP POST requests to /ajax.php with file uploads
- Unusual outbound connections from server
SIEM Query:
source="web_logs" AND uri="/ajax.php" AND method="POST" AND file_upload=true