CVE-2021-21876 Explained : Impact and Mitigation

A critical vulnerability with a CVSS base score of 9.1 has been identified in Lantronix PremierWave 2050 8.9.0.0R4. This CVE allows for arbitrary command execution via specially-crafted HTTP requests, posing a severe risk to affected systems.

Understanding CVE-2021-21876

This section provides insights into the nature and impact of the CVE-2021-21876 vulnerability.

What is CVE-2021-21876?

CVE-2021-21876 involves the improper neutralization of special elements in OS commands, enabling attackers to execute arbitrary commands via PUT requests.

The Impact of CVE-2021-21876

With a critical severity rating and a high impact on confidentiality, integrity, and availability, CVE-2021-21876 can lead to unauthorized access and control over vulnerable systems.

Technical Details of CVE-2021-21876

Explore the specific technical aspects of CVE-2021-21876 to better understand its implications.

Vulnerability Description

The vulnerability arises from the mishandling of HTTP requests, allowing authenticated attackers to exploit PUT requests for arbitrary command execution.

Affected Systems and Versions

Lantronix PremierWave 2050 8.9.0.0R4 is confirmed as an affected version, highlighting the importance of immediate action for users of this software.

Exploitation Mechanism

By sending crafted HTTP requests, threat actors can manipulate PUT requests to execute unauthorized commands, endangering the security and integrity of the targeted systems.

Mitigation and Prevention

Discover effective strategies to mitigate the risks associated with CVE-2021-21876 and safeguard your IT infrastructure.

Immediate Steps to Take

Users are advised to update or patch affected Lantronix PremierWave 2050 8.9.0.0R4 installations promptly and monitor network traffic for any suspicious activity.

Long-Term Security Practices

Implementing network segmentation, least privilege access controls, and regular security audits can enhance the overall security posture and reduce the likelihood of successful attacks.

Patching and Updates

Stay informed about security patches and updates released by Lantronix to address CVE-2021-21876 and other potential vulnerabilities, prioritizing timely implementation to minimize exposure.