CVE-2020-24195
📋 TL;DR
This vulnerability allows authenticated administrators in Online Bike Rental v1.0 to upload arbitrary files, including malicious scripts, leading to remote code execution. Attackers who compromise admin credentials can take full control of affected systems. Only systems running this specific software version are affected.
💻 Affected Systems
- Sourcecodester Online Bike Rental
📦 What is this software?
Online Bike Rental by Online Bike Rental Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the web server, potentially leading to data theft, ransomware deployment, or use as a pivot point for internal network attacks.
Likely Case
Attackers upload web shells to execute arbitrary commands, steal sensitive data, deface websites, or install backdoors for persistent access.
If Mitigated
With proper file upload validation and admin credential protection, exploitation risk is significantly reduced, though the vulnerability remains present.
🎯 Exploit Status
Exploit code is publicly available on Packet Storm. Requires admin credentials but upload process is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Consider replacing with alternative software or implementing custom security fixes.
🔧 Temporary Workarounds
Implement File Upload Validation
allAdd server-side validation to restrict uploaded files to specific extensions (jpg, png, gif) and verify file content types.
Restrict Upload Directory Permissions
linuxSet upload directory permissions to prevent execution of uploaded files and store them outside web root.
chmod 644 /path/to/upload/directory/*
chown www-data:www-data /path/to/upload/directory
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block file uploads with dangerous extensions (.php, .phtml, .exe)
- Strengthen admin authentication with multi-factor authentication and strong password policies
🔍 How to Verify
Check if Vulnerable:
Check if you're running Online Bike Rental v1.0 by examining the software version in admin panel or source code.Check Version:
Check admin panel or look for version information in source files like config.php or readme files.Verify Fix Applied:
Test file upload functionality with non-image files - if rejected, fix may be working. Attempt to upload a PHP file to verify.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with non-image extensions
- Multiple failed login attempts to admin panel
- Execution of unexpected PHP files in upload directory
Network Indicators:
- POST requests to upload endpoints with suspicious file types
- Traffic to unexpected URLs in upload directories
SIEM Query:
source="web_server" AND (uri="/admin/upload*" OR uri="*/upload*") AND (file_extension="php" OR file_extension="phtml" OR file_extension="exe")🔗 References
- https://packetstormsecurity.com/files/158704/Online-Bike-Rental-1.0-Shell-Upload.html
- https://www.sourcecodester.com/php/14374/online-bike-rental-phpmysql.html
- https://packetstormsecurity.com/files/158704/Online-Bike-Rental-1.0-Shell-Upload.html
- https://www.sourcecodester.com/php/14374/online-bike-rental-phpmysql.html
