CVE-2025-32827 Overview
CVE-2025-32827 is a SQL injection vulnerability [CWE-89] affecting Siemens TeleControl Server Basic in all versions prior to V3.1.2.2. The flaw resides in the internally used ActivateProject method, which fails to properly sanitize input before constructing database queries. An authenticated remote attacker with network access to port 8000 can bypass authorization controls, read and write to the application database, and execute code under the NT AUTHORITY\NetworkService account.
Critical Impact
Authenticated attackers can execute code as NT AUTHORITY\NetworkService and manipulate the backing database on systems exposing port 8000.
Affected Products
- Siemens TeleControl Server Basic, all versions before V3.1.2.2
- Deployments exposing TCP port 8000 to untrusted networks
- Industrial control environments relying on TeleControl Server Basic for SCADA telemetry
Discovery Timeline
- 2025-04-16 - CVE-2025-32827 published to NVD
- 2025-08-19 - Last updated in NVD database
Technical Details for CVE-2025-32827
Vulnerability Analysis
The vulnerability stems from improper neutralization of special elements in a SQL statement built by the ActivateProject method. The method is reachable through the application's network service listening on port 8000. Although the method is described as internal, an authenticated attacker can invoke it remotely and inject SQL syntax into the query body.
Successful exploitation grants full read and write access to the application database. Because the service runs as NT AUTHORITY\NetworkService, an attacker can leverage SQL-level features such as stored procedure execution to run operating system commands in that security context. This bridges database compromise into host-level code execution.
The issue is tracked under CWE-89: Improper Neutralization of Special Elements used in an SQL Command.
Root Cause
The ActivateProject method concatenates attacker-controllable input into a SQL query without parameterization or input validation. Authorization checks downstream of the query construction can be bypassed because the injected SQL alters the logic of the statement before any authorization enforcement occurs.
Attack Vector
An attacker must hold valid credentials and reach TCP port 8000 on the server. From that position, the attacker sends a crafted request that triggers the vulnerable ActivateProject method with SQL payloads embedded in the input. No user interaction is required. Refer to the Siemens Security Advisory SSA-443402 for vendor-confirmed technical details.
Detection Methods for CVE-2025-32827
Indicators of Compromise
- Unexpected outbound or lateral connections originating from processes running as NT AUTHORITY\NetworkService on the TeleControl host
- Database audit log entries showing schema or data modifications outside normal project activation workflows
- Anomalous authenticated sessions on TCP port 8000 invoking the ActivateProject operation
Detection Strategies
- Inspect application and database logs for SQL syntax tokens (UNION, --, ;, xp_cmdshell) within ActivateProject request parameters
- Alert on child processes spawned by the TeleControl Server Basic service that do not match the expected process tree
- Correlate authentication events with subsequent privileged database operations to surface bypass attempts
Monitoring Recommendations
- Enable verbose SQL audit logging on the backing database and forward logs to a centralized analytics pipeline
- Capture network flow data for TCP port 8000 and baseline normal client interactions to detect deviations
- Monitor file system writes and registry modifications performed under the NetworkService account on TeleControl hosts
How to Mitigate CVE-2025-32827
Immediate Actions Required
- Upgrade TeleControl Server Basic to version V3.1.2.2 or later as specified in the Siemens advisory
- Restrict network access to TCP port 8000 to trusted engineering workstations only
- Rotate credentials for any account that could authenticate to the affected service
- Review database contents for unauthorized modifications before returning the system to production
Patch Information
Siemens released the fixed version V3.1.2.2 of TeleControl Server Basic. Patch and remediation guidance is available in the Siemens Security Advisory SSA-443402.
Workarounds
- Place the TeleControl Server inside a segmented control network and block port 8000 at the perimeter firewall
- Enforce least-privilege accounts for users authorized to interact with the application
- Apply host-based firewall rules to allow connections to port 8000 only from known management IP addresses
# Example Windows firewall rule restricting access to port 8000
netsh advfirewall firewall add rule name="Restrict TeleControl 8000" \
dir=in action=block protocol=TCP localport=8000
netsh advfirewall firewall add rule name="Allow TeleControl Mgmt" \
dir=in action=allow protocol=TCP localport=8000 remoteip=10.0.0.0/24
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
