CVE-2021-39279 : Exploit Details and Defense Strategies

Certain MOXA devices are vulnerable to Authenticated Command Injection via /forms/web_importTFTP, impacting several specific models.

Understanding CVE-2021-39279

This CVE identifies a security issue in MOXA devices that allows Authenticated Command Injection.

What is CVE-2021-39279?

Authenticated Command Injection vulnerability via /forms/web_importTFTP in certain MOXA devices

The Impact of CVE-2021-39279

Affected models: WAC-2004 1.7, WAC-1001 2.1, OnCell G3470A-LTE-EU 1.7, and more
An attacker could exploit this to execute arbitrary commands with elevated privileges

Technical Details of CVE-2021-39279

This section delves into the vulnerability's specifics.

Vulnerability Description

Authenticated Command Injection through /forms/web_importTFTP

Affected Systems and Versions

WAC-2004 1.7
WAC-1001 2.1
OnCell G3470A-LTE-EU 1.7
Multiple other models listed in the JSON

Exploitation Mechanism

Exploitation involves injecting malicious commands via the specific route /forms/web_importTFTP

Mitigation and Prevention

Explore the steps to mitigate and prevent exploitation.

Immediate Steps to Take

Patch affected systems immediately
Restrict network access to vulnerable devices

Long-Term Security Practices

Regularly update devices with security patches
Conduct security training for users to recognize and report suspicious activities

Patching and Updates

Install the latest firmware or software updates from MOXA to address this vulnerability