CVE-2024-55466
📋 TL;DR
This CVE describes an arbitrary file upload vulnerability in ThingsBoard's Image Gallery component that allows attackers to upload malicious files and execute arbitrary code on affected systems. The vulnerability affects ThingsBoard Community, ThingsBoard Cloud, and ThingsBoard Professional versions. Attackers can potentially gain full control of the ThingsBoard server through this flaw.
💻 Affected Systems
- ThingsBoard Community
- ThingsBoard Cloud
- ThingsBoard Professional
📦 What is this software?
Thingsboard by Thingsboard
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining root/admin privileges, data exfiltration, ransomware deployment, and lateral movement within the network.
Likely Case
Remote code execution leading to server takeover, installation of backdoors, cryptocurrency miners, or participation in botnets.
If Mitigated
Limited impact with proper file upload restrictions, but still potential for denial of service or limited file system access.
🎯 Exploit Status
Exploitation requires authentication to access the Image Gallery upload feature. Public proof-of-concept code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v3.8.2 or later
Vendor Advisory: https://github.com/thingsboard/thingsboard/releases/tag/v3.8.1
Restart Required: Yes
Instructions:
1. Backup your ThingsBoard instance and database. 2. Download and install ThingsBoard v3.8.2 or later from the official releases. 3. Follow the upgrade instructions for your deployment type (Docker, manual, etc.). 4. Restart the ThingsBoard service. 5. Verify the upgrade was successful.
🔧 Temporary Workarounds
Disable Image Gallery Upload
allTemporarily disable file upload functionality in the Image Gallery component
Modify ThingsBoard configuration to restrict file uploads or disable the Image Gallery feature entirely
Implement Web Application Firewall Rules
allBlock malicious file uploads at the network perimeter
Configure WAF to block file uploads with dangerous extensions (.jsp, .php, .exe, etc.) and suspicious content patterns
🧯 If You Can't Patch
- Implement strict file upload validation: only allow specific image formats (jpg, png, gif) and validate file signatures
- Restrict network access to ThingsBoard instances using firewall rules and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check if running ThingsBoard v3.8.1 by examining version files or using the admin interfaceCheck Version:
Check the ThingsBoard UI admin panel or examine the version.txt file in the installation directoryVerify Fix Applied:
Verify version is v3.8.2 or later and test file upload functionality with restricted file types📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Image Gallery endpoint
- Files with non-image extensions being uploaded
- Suspicious process execution following file uploads
Network Indicators:
- HTTP POST requests to /api/file/upload with unusual file types
- Outbound connections from ThingsBoard server to unknown IPs
SIEM Query:
source="thingsboard" AND (uri_path="/api/file/upload" AND file_extension NOT IN ("jpg","png","gif","jpeg"))