CVE-2022-28062
📋 TL;DR
Car Rental System v1.0 contains an arbitrary file upload vulnerability in the Add Car component that allows attackers to upload malicious files like webshells. This leads to remote code execution on the server, potentially compromising the entire system. Any organization using this specific software version is affected.
💻 Affected Systems
- Car Rental System
📦 What is this software?
Online Car Rental System by Online Car Rental System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the server, data theft, lateral movement to other systems, and deployment of ransomware or other malware.
Likely Case
Attacker uploads a webshell, executes arbitrary commands, steals sensitive data (customer information, payment details), and maintains persistent access to the system.
If Mitigated
If proper file upload validation and web application firewalls are in place, the attack would be blocked or detected before successful exploitation.
🎯 Exploit Status
Exploitation requires authentication to access the Add Car component. Multiple public proof-of-concept exploits demonstrate webshell upload leading to RCE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Check if vendor has released an updated version. 2. If no patch exists, implement workarounds or consider replacing the software.
🔧 Temporary Workarounds
Implement File Upload Validation
allAdd server-side validation to restrict uploaded files to specific extensions (e.g., only .jpg, .png) and verify file content types.
Modify PHP code in the Add Car component to include: $allowed_extensions = ['jpg', 'png', 'gif']; $file_extension = strtolower(pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION)); if (!in_array($file_extension, $allowed_extensions)) { die('Invalid file type'); }
Web Application Firewall Rules
allConfigure WAF to block file uploads with dangerous extensions (.php, .asp, .jsp) and suspicious patterns.
Add WAF rule: deny requests where POST body contains '<?php' or file extension in ['php', 'asp', 'jsp', 'aspx']
🧯 If You Can't Patch
- Disable the Add Car component entirely if not needed
- Implement network segmentation to isolate the Car Rental System from critical infrastructure
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a file with a .php extension through the Add Car interface. If successful, the system is vulnerable.Check Version:
Check the software version in the admin panel or configuration files (typically config.php or similar)Verify Fix Applied:
Test file upload with restricted extensions (.php) - should be rejected. Verify WAF logs show blocked attempts.📡 Detection & Monitoring
Log Indicators:
- File uploads with unusual extensions (.php, .asp) in web server logs
- POST requests to upload endpoints with suspicious filenames
- Execution of system commands in application logs
Network Indicators:
- Unusual outbound connections from the web server
- Traffic patterns consistent with webshell communication
SIEM Query:
source="web_server" AND (uri_path="/add_car.php" OR uri_path="/upload.php") AND (file_extension="php" OR file_extension="asp" OR file_extension="jsp")