CVE-2017-5159 : Exploit Details and Defense Strategies

Phoenix Contact mGuard devices upgraded to Version 8.4.0 may face a critical security issue that resets the administrator user's password to the default value.

Understanding CVE-2017-5159

Phoenix Contact mGuard devices running Version 8.4.0 are susceptible to a vulnerability that impacts the administrator user's password.

What is CVE-2017-5159?

A flaw in the update-upload feature of Phoenix Contact mGuard devices on Version 8.4.0 causes the administrator user's password to reset to the default value after a successful update.

The Impact of CVE-2017-5159

This vulnerability allows unauthorized access to the mGuard device, compromising the security of the system and potentially leading to unauthorized configuration changes or data breaches.

Technical Details of CVE-2017-5159

Phoenix Contact mGuard devices on Version 8.4.0 are affected by a critical security issue that resets the administrator user's password to the default value.

Vulnerability Description

The flaw occurs when updating an mGuard device to Version 8.4.0 using the update-upload feature, resulting in the reset of the administrator user's password.

Affected Systems and Versions

Product: Phoenix Contact mGuard 8.4.0
Version: Phoenix Contact mGuard 8.4.0

Exploitation Mechanism

Attackers can exploit this vulnerability by gaining unauthorized access to the mGuard device using the default administrator password.

Mitigation and Prevention

To address CVE-2017-5159, immediate steps and long-term security practices are essential.

Immediate Steps to Take

Change the default administrator password on affected mGuard devices.
Implement network segmentation to restrict access to vulnerable devices.
Monitor for any unauthorized access or configuration changes.

Long-Term Security Practices

Regularly update mGuard devices with the latest firmware and security patches.
Conduct security training for administrators on best practices for password management and device security.

Patching and Updates

Apply patches or updates provided by Phoenix Contact to fix the vulnerability and prevent password resets.