Description
A vulnerability has been identified in TeleControl Server Basic (All versions < V3.1.2.2). The affected application is vulnerable to SQL injection through the internally used 'Authenticate' method. This could allow an unauthenticated remote attacker to bypass authorization controls, to read from and write to the application's database and execute code with "NT AUTHORITY\NetworkService" permissions. A successful attack requires the attacker to be able to access port 8000 on a system where a vulnerable version of the affected application is executed on. (ZDI-CAN-25913)
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-11449
1. Vulnerability Assessment and Severity Evaluation
The vulnerability identified in TeleControl Server Basic (all versions < V3.1.2.2) is an SQL injection flaw in the 'Authenticate' method. This vulnerability allows an unauthenticated remote attacker to bypass authorization controls, read from and write to the application's database, and execute code with "NT AUTHORITY\NetworkService" permissions. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, which is considered critical.
CVSS Base Score Vector Breakdown:
- AV:N (Network Vector): The vulnerability is exploitable over the network.
- AC:L (Low Complexity): The attack requires low skill or resources.
- PR:N (No Privileges Required): No privileges are required to exploit the vulnerability.
- UI:N (No User Interaction): No user interaction is required.
- S:U (Unchanged): The scope of the vulnerability does not change.
- C:H (High Confidentiality Impact): Complete loss of confidentiality.
- I:H (High Integrity Impact): Complete loss of integrity.
- A:H (High Availability Impact): Complete loss of availability.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Network Access: The attacker needs access to port 8000 on the target system.
- SQL Injection: The attacker can inject malicious SQL queries through the 'Authenticate' method.
Exploitation Methods:
- SQL Injection: Crafting SQL queries to manipulate the database, extract sensitive information, or alter data.
- Code Execution: Leveraging the SQL injection to execute arbitrary code with elevated privileges.
- Data Exfiltration: Extracting sensitive data from the database.
- Unauthorized Access: Bypassing authentication mechanisms to gain unauthorized access to the system.
3. Affected Systems and Software Versions
Affected Software:
- TeleControl Server Basic
Affected Versions:
- All versions prior to V3.1.2.2
Vendor:
- Siemens
4. Recommended Mitigation Strategies
Immediate Actions:
- Patching: Upgrade to TeleControl Server Basic version V3.1.2.2 or later.
- Network Segmentation: Restrict access to port 8000 to trusted networks only.
- Firewall Rules: Implement strict firewall rules to block unauthorized access to port 8000.
- Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity on port 8000.
Long-Term Strategies:
- Regular Audits: Conduct regular security audits and vulnerability assessments.
- User Training: Educate users on the importance of security best practices.
- Incident Response Plan: Develop and maintain an incident response plan to quickly address any security breaches.
5. Impact on European Cybersecurity Landscape
The vulnerability in TeleControl Server Basic poses a significant risk to European organizations, particularly those in critical infrastructure sectors such as energy, manufacturing, and healthcare, where Siemens products are widely used. A successful exploitation could lead to data breaches, operational disruptions, and potential financial losses. The high severity of this vulnerability underscores the need for robust cybersecurity measures and continuous monitoring to protect against such threats.
6. Technical Details for Security Professionals
Vulnerability Details:
- CVE ID: CVE-2025-27540
- Affected Method: 'Authenticate'
- Exploitation Requirements: Access to port 8000
- Permissions: "NT AUTHORITY\NetworkService"
Detection and Monitoring:
- Log Analysis: Monitor logs for unusual SQL queries and unauthorized access attempts.
- Anomaly Detection: Implement anomaly detection systems to identify deviations from normal behavior.
- Network Traffic Analysis: Use network traffic analysis tools to detect and block malicious traffic targeting port 8000.
Incident Response:
- Containment: Isolate affected systems to prevent further spread.
- Eradication: Remove malicious code and restore systems to a secure state.
- Recovery: Ensure all systems are patched and secure before reconnecting to the network.
- Post-Incident Analysis: Conduct a thorough analysis to understand the attack and improve defenses.
References:
By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their critical assets.