CVE-2021-21873 : Security Advisory and Response

A critical vulnerability was discovered in Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU) that allows arbitrary command execution via a crafted HTTP request triggering the RSA keypasswd parameter. This could be exploited by an attacker through an authenticated HTTP request.

Understanding CVE-2021-21873

This section will delve into the details surrounding CVE-2021-21873.

What is CVE-2021-21873?

The CVE-2021-21873 vulnerability involves improper neutralization of special elements leading to OS command injection (CWE-78) in Lantronix products.

The Impact of CVE-2021-21873

The impact is rated as critical with a CVSS base score of 9.1, affecting confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-21873

Let's explore the technical aspects of CVE-2021-21873 in more detail.

Vulnerability Description

A specially-crafted HTTP request can be leveraged for arbitrary command execution in the RSA keypasswd parameter, posing a severe threat to system security.

Affected Systems and Versions

The vulnerability affects Lantronix PremierWave 2050 8.9.0.0R4 running on QEMU.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious authenticated HTTP requests to the target system.

Mitigation and Prevention

Discover how to address and prevent the risks associated with CVE-2021-21873 below.

Immediate Steps to Take

As an immediate step, consider applying patches provided by Lantronix to mitigate the vulnerability.

Long-Term Security Practices

In the long term, ensure regular security updates, monitor network traffic for suspicious activities, and enforce strict access controls.

Patching and Updates

Regularly check for security updates from Lantronix and apply them promptly to prevent exploitation of this critical vulnerability.