CVE-2021-21882 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-21882, an OS command injection vulnerability in Lantronix PremierWave 2050 8.9.0.0R4 that can lead to arbitrary command execution.

Understanding CVE-2021-21882

CVE-2021-21882 is a critical vulnerability affecting Lantronix PremierWave 2050 8.9.0.0R4, allowing attackers to execute arbitrary commands through a specially-crafted HTTP request.

What is CVE-2021-21882?

CVE-2021-21882 is an OS command injection vulnerability in the Web Manager FsUnmount functionality of Lantronix PremierWave 2050 8.9.0.0R4. Attackers can exploit this flaw by sending a malicious authenticated HTTP request.

The Impact of CVE-2021-21882

With a CVSS base score of 9.9, CVE-2021-21882 poses a critical risk to confidentiality, integrity, and availability. A successful exploit could lead to unauthorized command execution.

Technical Details of CVE-2021-21882

This section covers key technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises due to improper neutralization of special elements used in an OS command, enabling attackers to inject and execute arbitrary commands remotely.

Affected Systems and Versions

Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU) is confirmed to be affected by CVE-2021-21882.

Exploitation Mechanism

By crafting a specific HTTP request, authenticated attackers can leverage the Web Manager FsUnmount functionality to execute unauthorized commands remotely.

Mitigation and Prevention

To protect systems from CVE-2021-21882, immediate actions and long-term security practices should be implemented.

Immediate Steps to Take

Organizations should apply security patches or updates provided by Lantronix to address the vulnerability promptly. Additionally, restrict network access to mitigate the risk of exploitation.

Long-Term Security Practices

Implement strict input validation techniques, ensure principle of least privilege, and conduct regular security assessments to identify and remediate potential vulnerabilities.

Patching and Updates

Stay informed about security advisories from Lantronix and apply patches or updates as soon as they are released to protect systems from CVE-2021-21882.