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CVE-2021-21930 : What You Need to Know

Learn about CVE-2021-21930, a SQL injection vulnerability in Advantech R-SeeNet up to version 2.4.15. Understand the impact, technical details, and mitigation best practices.

A SQL injection vulnerability has been identified in Advantech R-SeeNet versions up to 2.4.15. This flaw could allow an attacker to execute malicious SQL queries via a specially-crafted HTTP request. The vulnerability can be triggered by sending crafted requests to the 'sn_filter' parameter, enabling attackers to act as authenticated users or through cross-site request forgery.

Understanding CVE-2021-21930

This section delves into the details of the SQL injection vulnerability affecting Advantech R-SeeNet.

What is CVE-2021-21930?

The CVE-2021-21930 vulnerability pertains to improper neutralization of special elements in SQL commands, leading to SQL injection attacks.

The Impact of CVE-2021-21930

With a high base severity score of 7.7, this vulnerability can result in a confidentiality impact and potentially compromise sensitive data.

Technical Details of CVE-2021-21930

Let's explore the technical aspects of the CVE-2021-21930 vulnerability.

Vulnerability Description

A specially-crafted HTTP request can lead to SQL injection, allowing attackers to manipulate database queries.

Affected Systems and Versions

The vulnerability affects Advantech R-SeeNet versions up to 2.4.15.

Exploitation Mechanism

By exploiting the 'sn_filter' parameter, attackers can execute SQL injection attacks as authenticated users or through CSRF.

Mitigation and Prevention

Discover the measures to mitigate and prevent exploitation of CVE-2021-21930.

Immediate Steps to Take

It is crucial to apply security patches, restrict access to vulnerable components, and monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and educate users on safe browsing habits to prevent SQL injection attacks.

Patching and Updates

Stay informed about security updates released by Advantech and promptly apply relevant patches to address the CVE-2021-21930 vulnerability.

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