CVE-2025-31352
📋 TL;DR
This SQL injection vulnerability in TeleControl Server Basic allows authenticated attackers to bypass authorization, read/write to the database, and execute code with NetworkService permissions. It affects all versions before V3.1.2.2. Attackers need access to port 8000 on systems running vulnerable versions.
💻 Affected Systems
- TeleControl Server Basic
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with NetworkService privileges leading to lateral movement, data exfiltration, and persistent backdoor installation.
Likely Case
Database manipulation, credential theft, and unauthorized code execution on affected systems.
If Mitigated
Limited impact due to network segmentation and authentication requirements, potentially only affecting isolated systems.
🎯 Exploit Status
SQL injection via UpdateGateways method requires authenticated access but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.1.2.2
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-443402.html
Restart Required: Yes
Instructions:
1. Download V3.1.2.2 from Siemens support portal. 2. Backup configuration and data. 3. Stop TeleControl Server Basic service. 4. Install update. 5. Restart service and verify functionality.
🔧 Temporary Workarounds
Network Segmentation
windowsRestrict access to port 8000/TCP to only trusted networks and users
Windows Firewall: New-NetFirewallRule -DisplayName "Block TeleControl Port" -Direction Inbound -LocalPort 8000 -Protocol TCP -Action Block
Authentication Hardening
allImplement strong authentication policies and monitor for suspicious authenticated sessions
🧯 If You Can't Patch
- Implement strict network access controls to limit port 8000 exposure
- Monitor and audit all authenticated sessions and database queries for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check TeleControl Server Basic version in application interface or installation directoryCheck Version:
Check application GUI or installation propertiesVerify Fix Applied:
Verify version is V3.1.2.2 or later in application interface📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed authentication attempts followed by successful login
- Unexpected process execution with NetworkService context
Network Indicators:
- Unusual traffic patterns on port 8000
- SQL injection patterns in network traffic
SIEM Query:
source="telecontrol" AND ("UpdateGateways" OR "sql" OR "injection")