CVE-2023-48243
📋 TL;DR
This critical vulnerability allows remote attackers to upload arbitrary files anywhere on affected Bosch systems via crafted HTTP requests, leading to remote code execution with root privileges. It affects Bosch Rexroth ctrlX CORE and ctrlX COREvirtual devices running vulnerable firmware versions.
💻 Affected Systems
- Bosch Rexroth ctrlX CORE
- Bosch Rexroth ctrlX COREvirtual
📦 What is this software?
Nexo Os by Bosch
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level remote code execution, allowing attackers to install persistent backdoors, steal sensitive data, or disrupt industrial operations.
Likely Case
Remote code execution leading to data theft, system manipulation, or lateral movement within industrial networks.
If Mitigated
Limited impact if systems are isolated behind firewalls with strict network controls and file upload restrictions.
🎯 Exploit Status
No authentication required, simple HTTP request manipulation needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.28.0 or later
Vendor Advisory: https://psirt.bosch.com/security-advisories/BOSCH-SA-711465.html
Restart Required: Yes
Instructions:
1. Download firmware version 1.28.0 or later from Bosch Rexroth support portal. 2. Backup device configuration. 3. Apply firmware update via web interface or local update method. 4. Reboot device after installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in separate VLANs with strict firewall rules limiting HTTP access.
Web Interface Restriction
linuxConfigure firewall to block external access to device web interface (typically port 443).
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation and zero-trust principles
- Deploy web application firewall (WAF) with file upload filtering rules
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web interface under System > About. Versions before 1.28.0 are vulnerable.Check Version:
curl -k https://device-ip/api/version 2>/dev/null | grep firmwareVerify Fix Applied:
Confirm firmware version is 1.28.0 or later in System > About page.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activity in web server logs
- HTTP POST requests to file upload endpoints with unusual filenames
Network Indicators:
- HTTP requests with file upload parameters to device management interface
- Unexpected outbound connections from device after exploitation
SIEM Query:
source="web_logs" AND (url="*upload*" OR method="POST") AND dest_ip="device_ip" AND file_extension NOT IN ("jpg","png","pdf")