CVE-2021-27276 Explained : Impact and Mitigation

This CVE-2021-27276 affects the ProSAFE Network Management System version 1.6.0.26 by NETGEAR, allowing remote attackers to delete arbitrary files through a path traversal vulnerability.

Understanding CVE-2021-27276

This CVE exposes a flaw in the MibController class of the ProSAFE Network Management System, enabling attackers to create a denial-of-service condition.

What is CVE-2021-27276?

CVE-2021-27276 is a path traversal vulnerability in the NETGEAR ProSAFE Network Management System 1.6.0.26, allowing unauthorized file deletion by bypassing authentication mechanisms.

The Impact of CVE-2021-27276

With a CVSS base score of 7.1 (High), this vulnerability poses a significant threat to the availability of affected systems. Attackers can exploit this flaw remotely, leading to a denial-of-service scenario.

Technical Details of CVE-2021-27276

This section delves into the specifics of the vulnerability, including its description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability lies in how the MibController class handles the realName parameter, lacking proper path validation before executing file operations, enabling attackers to manipulate file systems.

Affected Systems and Versions

The ProSAFE Network Management System version 1.6.0.26 by NETGEAR is impacted by this vulnerability, exposing installations to potential remote attacks.

Exploitation Mechanism

Attackers can exploit this flaw remotely over the network without requiring user interaction, with low attack complexity and privilege requirements.

Mitigation and Prevention

In this section, we discuss immediate steps to take and long-term security practices to safeguard systems from CVE-2021-27276.

Immediate Steps to Take

It is crucial to apply patches promptly, restrict network access to vulnerable systems, and review system logs for any suspicious activities.

Long-Term Security Practices

Implementing network segmentation, regular security assessments, and staying informed about security advisories can enhance overall security posture.

Patching and Updates

Regularly check for security updates and patches released by NETGEAR to address the vulnerability effectively.