CVE-2018-11452 : Vulnerability Insights and Analysis

A vulnerability has been detected in the Firmware variant IEC 61850 for EN100 Ethernet module, PROFINET IO, Modbus TCP, DNP3 TCP, and IEC104 for EN100 Ethernet module. The vulnerability could lead to a denial-of-service situation affecting the EN100 communication module.

Understanding CVE-2018-11452

This CVE involves a vulnerability in various firmware variants for the EN100 Ethernet module by Siemens AG.

What is CVE-2018-11452?

The vulnerability allows for a denial-of-service condition in the EN100 module when manipulated packets are sent to port 102/tcp while oscillographs are operational. Successful exploitation requires network access and the delivery of multiple packets to the module.

The Impact of CVE-2018-11452

The vulnerability can disrupt network functionality, compromising system availability.
No user interaction or privileges are needed for exploitation.
No instances of public exploitation have been reported at the time of publication.

Technical Details of CVE-2018-11452

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Affected firmware variants: IEC 61850, PROFINET IO, Modbus TCP, DNP3 TCP, IEC104 for EN100 Ethernet module.
Vulnerability: Denial-of-service condition due to manipulated packets to port 102/tcp.

Affected Systems and Versions

Firmware variant IEC 61850: All versions < V4.33
Firmware variant PROFINET IO, Modbus TCP, DNP3 TCP: All versions
Firmware variant IEC104: All versions < V1.22

Exploitation Mechanism

Attacker needs network access to send crafted packets to the EN100 module.
IEC 61850-MMS communication must be activated on affected EN100 modules.

Mitigation and Prevention

Protect your systems from CVE-2018-11452 with the following steps:

Immediate Steps to Take

Monitor network traffic for any suspicious activity targeting port 102/tcp.
Implement firewall rules to restrict access to vulnerable modules.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify weaknesses.
Educate staff on cybersecurity best practices to prevent unauthorized access.

Patching and Updates

Siemens AG may release patches or updates to address the vulnerability.
Stay informed about security advisories and apply patches as soon as they are available.