CVE-2017-7937 : Vulnerability Insights and Analysis

A vulnerability related to authentication has been identified in the mGuard firmware versions 8.3.0 to 8.4.2 of Phoenix Contact GmbH. If the RADIUS servers become inaccessible, an attacker might potentially obtain unauthorized entry into the user firewall.

Understanding CVE-2017-7937

This CVE involves an Improper Authentication issue in Phoenix Contact GmbH mGuard firmware versions 8.3.0 to 8.4.2, potentially allowing unauthorized access to the user firewall.

What is CVE-2017-7937?

This CVE identifies a vulnerability in the mGuard firmware of Phoenix Contact GmbH, where attackers could gain unauthorized access to the user firewall when RADIUS servers are unreachable.

The Impact of CVE-2017-7937

The vulnerability could lead to unauthorized entry into the user firewall, compromising the security of the system and potentially allowing attackers to exploit the network.

Technical Details of CVE-2017-7937

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability lies in the authentication mechanism of the mGuard firmware versions 8.3.0 to 8.4.2, allowing attackers to bypass authentication and gain unauthorized access.

Affected Systems and Versions

Product: Phoenix Contact GmbH mGuard
Versions: 8.3.0 to 8.4.2

Exploitation Mechanism

When RADIUS servers are inaccessible, attackers can exploit this vulnerability to gain unauthorized entry into the user firewall.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update the mGuard firmware to a secure version that addresses the authentication issue.
Ensure RADIUS servers are properly configured and accessible to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor and update firmware to patch any security vulnerabilities promptly.
Implement network segmentation and access controls to limit unauthorized access to critical systems.

Patching and Updates

Stay informed about security advisories and updates from Phoenix Contact GmbH.
Apply patches and updates as soon as they are available to mitigate the risk of exploitation.