CVE-2024-58313
📋 TL;DR
xbtitFM 4.1.18 contains an insecure file upload vulnerability that allows authenticated administrators to upload and execute arbitrary PHP code through the file_hosting feature. Attackers can bypass file type restrictions by manipulating headers and file content to upload web shells, leading to remote code execution. This affects all xbtitFM 4.1.18 installations with the file hosting feature enabled.
💻 Affected Systems
- xbtitFM
📦 What is this software?
Xbtitfm by Xbtitfm
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing attackers to execute arbitrary system commands, steal data, install malware, pivot to other systems, and maintain persistent access.
Likely Case
Attackers upload web shells to gain remote code execution, potentially leading to data theft, defacement, or use as a foothold for further attacks.
If Mitigated
Limited impact if proper file upload validation and execution restrictions are in place, though the vulnerability still exists.
🎯 Exploit Status
Exploit requires administrative credentials but uses simple header manipulation and magic byte injection to bypass restrictions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://xbtitfm.eu
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Disable file_hosting feature
allDisable the vulnerable file hosting functionality in xbtitFM configuration.
Edit configuration file to disable file_hosting module
Implement strict file upload validation
allAdd server-side validation for file types, content, and extensions beyond client-side checks.
Modify PHP upload handling code to validate file magic bytes and extensions
🧯 If You Can't Patch
- Restrict administrative access to trusted users only and implement strong authentication controls.
- Monitor file upload directories for suspicious PHP files and implement file integrity monitoring.
🔍 How to Verify
Check if Vulnerable:
Check if running xbtitFM version 4.1.18 with file_hosting feature enabled. Attempt to upload a PHP file with GIF magic bytes and modified Content-Type header.Check Version:
Check xbtitFM configuration files or admin panel for version information.Verify Fix Applied:
Verify file_hosting is disabled or that file upload validation now properly checks file content and extensions.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to file_hosting directory, especially PHP files with GIF headers
- Administrative account performing unexpected file uploads
Network Indicators:
- HTTP POST requests to file upload endpoints with manipulated Content-Type headers
- Subsequent requests to uploaded PHP files with system commands
SIEM Query:
source="web_logs" AND (uri="/file_hosting/upload" OR uri MATCHES "*.php") AND (user_agent="*admin*" OR method="POST")