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CVE-2021-21886 Explained : Impact and Mitigation

Learn about CVE-2021-21886, a directory traversal vulnerability in Lantronix PremierWave 2050 8.9.0.0R4 that allows information disclosure. Find out the impact, technical details, and mitigation steps.

A directory traversal vulnerability exists in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4, allowing information disclosure through a specially crafted HTTP request.

Understanding CVE-2021-21886

This CVE describes a directory traversal vulnerability in Lantronix PremierWave 2050 8.9.0.0R4 that could lead to information disclosure when exploited by an attacker.

What is CVE-2021-21886?

CVE-2021-21886 is a vulnerability in the Web Manager FSBrowsePage functionality of Lantronix PremierWave 2050 8.9.0.0R4 that enables an attacker to make an authenticated HTTP request to disclose sensitive information.

The Impact of CVE-2021-21886

With a base CVSS score of 4.3 (Medium severity), the vulnerability poses a risk of information disclosure, requiring immediate attention to prevent exploitation by threat actors.

Technical Details of CVE-2021-21886

The technical details of CVE-2021-21886 include:

Vulnerability Description

The vulnerability allows attackers to perform directory traversal through specially crafted HTTP requests, potentially leading to information leaks.

Affected Systems and Versions

Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU) is affected by this vulnerability, putting systems with this version at risk.

Exploitation Mechanism

Exploitation involves making an authenticated HTTP request to trigger the directory traversal vulnerability and disclose information.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-21886, consider the following:

Immediate Steps to Take

        Update to a patched version that addresses the directory traversal vulnerability.

Long-Term Security Practices

        Implement secure coding practices to prevent similar path traversal issues in the future.

Patching and Updates

        Regularly apply security updates and patches to eliminate known vulnerabilities and enhance system security.

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