CVE-2025-31350
📋 TL;DR
This SQL injection vulnerability in TeleControl Server Basic allows authenticated remote attackers to bypass authorization controls, 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 privilege escalation within the application environment.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
SQL injection via UpdateBufferingSettings method requires authentication but has low technical complexity 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 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 controls and monitor for suspicious login attempts
🧯 If You Can't Patch
- Implement strict network access controls to limit port 8000 exposure
- Deploy web application firewall with SQL injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check TeleControl Server Basic version in application interface or installation directoryCheck Version:
Check application GUI or installation directory for version informationVerify Fix Applied:
Verify version is V3.1.2.2 or higher in application interface📡 Detection & Monitoring
Log Indicators:
- Unusual database queries
- Multiple failed authentication attempts followed by successful login
- Unexpected process execution with NetworkService context
Network Indicators:
- SQL-like patterns in traffic to port 8000
- Unusual outbound connections from TeleControl Server
SIEM Query:
source="TeleControl" AND (event_description="SQL" OR event_description="injection") OR destination_port=8000 AND payload_contains="SELECT|INSERT|UPDATE|DELETE"