Overview
In this article, we will be discussing a critical vulnerability that has been identified in all versions of TeleControl Server Basic with versions less than V3.1.2.2. This vulnerability can potentially lead to system compromise or data leakage, posing a significant risk to any organizations relying on these versions of the software for their operations. This matter is of high importance as the successful exploitation of this vulnerability could allow an authenticated remote attacker to bypass authorization controls, read from and write to the application’s database, and execute code with specific permissions.
Vulnerability Summary
CVE ID: CVE-2025-30002
Severity: High (CVSS score: 8.8)
Attack Vector: Network
Privileges Required: Low (Authenticated User)
User Interaction: None
Impact: System compromise, data leakage
Affected Products
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Product | Affected Versions
TeleControl Server Basic | All versions < V3.1.2.2 How the Exploit Works
This exploit leverages an SQL Injection vulnerability in the ‘UpdateConnectionVariables’ method used internally by the affected application. An attacker, who has authenticated access to the system, can send crafted SQL queries through this method to manipulate the application’s database. This can lead to unauthorized read or write operations and even execution of malicious code with “NT AUTHORITYNetworkService” permissions. The successful execution of the attack requires the attacker to access port 8000 on the targeted system.
Conceptual Example Code
Below is a conceptual example of exploiting this vulnerability. This example uses a malicious SQL query embedded within a regular request to the ‘UpdateConnectionVariables’ method:
POST /UpdateConnectionVariables HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "variable": "'; DROP TABLE users; --" }In this example, the SQL query `’; DROP TABLE users; –` is injected into the request, which if processed by the server, can lead to destructive consequences such as deleting the users table from the database.
Mitigation Guidance
To mitigate this vulnerability, users of TeleControl Server Basic are strongly recommended to apply the vendor patch as soon as possible. The patch updates the application to a version where the vulnerability has been resolved. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation strategy by monitoring and blocking suspicious activities.