CVE-2021-21937 : Vulnerability Insights and Analysis

A detailed analysis of CVE-2021-21937, a vulnerability in Advantech R-SeeNet that can be exploited via a specially-crafted HTTP request to trigger SQL injection.

Understanding CVE-2021-21937

In-depth information about the impact, technical details, and mitigation strategies for CVE-2021-21937.

What is CVE-2021-21937?

CVE-2021-21937 is a vulnerability in Advantech R-SeeNet that allows for SQL injection through a crafted HTTP request, potentially impacting confidentiality and system integrity.

The Impact of CVE-2021-21937

This vulnerability has a base score of 7.7, indicating a high severity issue with the potential for significant confidentiality impact when exploited.

Technical Details of CVE-2021-21937

Exploring the vulnerability description, affected systems, and the exploitation mechanism of CVE-2021-21937.

Vulnerability Description

Affecting Advantech R-SeeNet 2.4.15, this flaw enables attackers to perform SQL injection using the 'host_alt_filter' parameter.

Affected Systems and Versions

The vulnerable version impacted by this CVE is Advantech R-SeeNet 2.4.15 (30.07.2021).

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially-crafted HTTP request, either as an authenticated user or through cross-site request forgery.

Mitigation and Prevention

Guidance on immediate steps to take and long-term security practices to prevent exploitation of CVE-2021-21937.

Immediate Steps to Take

Ensure access controls for authenticated users, monitor HTTP requests, and apply security patches promptly.

Long-Term Security Practices

Implement input validation, conduct regular security audits, and educate users about safe browsing habits.

Patching and Updates

Stay informed about security updates from Advantech and apply patches as soon as they are released.