CVE-2021-21889 : Exploit Details and Defense Strategies

A stack-based buffer overflow vulnerability has been identified in the Web Manager Ping functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). This vulnerability could be exploited by a specially crafted HTTP request, potentially resulting in remote code execution when triggered by an authenticated HTTP request.

Understanding CVE-2021-21889

This section provides insights into the nature and impact of the CVE-2021-21889 vulnerability.

What is CVE-2021-21889?

The CVE-2021-21889 vulnerability is a stack-based buffer overflow issue that exists in the Web Manager Ping feature of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). By sending a specifically designed HTTP request, an attacker might execute arbitrary code remotely.

The Impact of CVE-2021-21889

With a CVSS base score of 9.9, indicating a critical severity level, the vulnerability can lead to high impacts on confidentiality, integrity, and availability. It requires low privileges and no user interaction.

Technical Details of CVE-2021-21889

Explore the technical aspects of CVE-2021-21889 to understand its implications better.

Vulnerability Description

The vulnerability arises due to a stack-based buffer overflow in the Web Manager Ping functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU), enabling remote code execution through a malicious HTTP request.

Affected Systems and Versions

Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU) is known to be impacted by this vulnerability. Ensure proper remediation for systems using this version.

Exploitation Mechanism

An attacker can exploit this vulnerability by crafting a specific HTTP request to the Web Manager Ping feature, allowing them to execute unauthorized code remotely.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-21889 and prevent its exploitation.

Immediate Steps to Take

As a proactive measure, organizations should apply security patches provided by Lantronix promptly to mitigate the risk of exploitation.

Long-Term Security Practices

Incorporate regular security assessments, network segmentation, and access control mechanisms to enhance the overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

Regularly monitor for security updates and apply patches as soon as they are released by Lantronix to ensure protection against known vulnerabilities.