CVE-2023-24317
📋 TL;DR
Judging Management System 1.0 contains an arbitrary file upload vulnerability in edit_organizer.php that allows attackers to upload malicious files, potentially leading to remote code execution. This affects all installations of version 1.0. Attackers can exploit this to take control of affected systems.
💻 Affected Systems
- Judging Management System
📦 What is this software?
Judging Management System by Judging Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, data theft, and lateral movement within the network.
Likely Case
Webshell upload leading to server compromise, data exfiltration, and potential ransomware deployment.
If Mitigated
Limited impact if file uploads are restricted and web application firewall blocks malicious payloads.
🎯 Exploit Status
Public exploit code available on Packet Storm Security. Simple HTTP POST request with malicious file upload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider migrating to alternative software or implementing workarounds.
🔧 Temporary Workarounds
Restrict file upload extensions
allModify edit_organizer.php to only allow specific safe file extensions
Edit edit_organizer.php to add: $allowed_extensions = array('jpg', 'png', 'pdf');
Implement file type verification
allAdd server-side validation to check actual file type, not just extension
Add mime-type checking: if (!in_array($_FILES['file']['type'], $allowed_mimes)) { die('Invalid file type'); }
🧯 If You Can't Patch
- Disable edit_organizer.php functionality completely
- Implement web application firewall rules to block file uploads to vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a test file with .php extension to /edit_organizer.php endpointCheck Version:
Check system version in admin panel or readme filesVerify Fix Applied:
Verify uploaded PHP files cannot be executed and only allowed extensions are accepted📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to edit_organizer.php with file uploads
- Unusual file creations in upload directories
- Execution of uploaded .php files
Network Indicators:
- File uploads to edit_organizer.php endpoint
- POST requests with multipart/form-data containing executable files
SIEM Query:
source="web_logs" AND uri="/edit_organizer.php" AND method="POST" AND file_extension IN ("php", "exe", "sh")