CVE-2017-11402 : Vulnerability Insights and Analysis

A vulnerability has been identified in the Belden Hirschmann Tofino Xenon Security Appliance version 03.2.00 and earlier, allowing attackers to bypass the firewall's protection.

Understanding CVE-2017-11402

This CVE involves design weaknesses in the OPC classic and custom netfilter modules of the Belden Hirschmann Tofino Xenon Security Appliance.

What is CVE-2017-11402?

The vulnerability enables attackers to remotely trigger firewall rules and establish connections to any TCP port of a protected asset by exploiting design flaws in the firewall.

The Impact of CVE-2017-11402

Attackers can bypass the firewall's protection measures and gain unauthorized access to sensitive assets.
The vulnerability poses a significant risk to the security of the affected systems.

Technical Details of CVE-2017-11402

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue lies in the design weaknesses of the OPC classic and custom netfilter modules, allowing attackers to manipulate the OPC dynamic port shift to bypass firewall rules.

Affected Systems and Versions

Belden Hirschmann Tofino Xenon Security Appliance version 03.2.00 and earlier

Exploitation Mechanism

Attackers exploit the design flaws in the firewall to remotely trigger firewall rules and establish unauthorized connections to protected assets.

Mitigation and Prevention

Protecting systems from CVE-2017-11402 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Belden Hirschmann Tofino Xenon Security Appliance to a patched version if available.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all software and firmware to address security vulnerabilities.
Conduct security audits and penetration testing to identify and mitigate potential risks.

Patching and Updates

Stay informed about security bulletins and advisories from Belden to apply patches promptly.