CVE-2021-21928 : Security Advisory and Response

A detailed look into CVE-2021-21928, a vulnerability in Advantech R-SeeNet 2.4.15 that can lead to SQL injection through specially-crafted HTTP requests.

Understanding CVE-2021-21928

This section delves into the impact, technical details, and mitigation strategies related to CVE-2021-21928.

What is CVE-2021-21928?

CVE-2021-21928 is a vulnerability in Advantech R-SeeNet 2.4.15 that allows attackers to execute SQL injection via specially-crafted HTTP requests targeted at the 'mac_filter' parameter.

The Impact of CVE-2021-21928

With a CVSS base score of 7.7 (High), this vulnerability poses a significant risk by enabling attackers to perform SQL injection, potentially compromising confidentiality.

Technical Details of CVE-2021-21928

Explore the vulnerability description, affected systems, versions, and exploitation mechanism of CVE-2021-21928.

Vulnerability Description

A specially-crafted HTTP request can trigger SQL injection by attackers targeting the 'mac_filter' parameter, leading to potential security breaches.

Affected Systems and Versions

Advantech R-SeeNet 2.4.15 (30.07.2021) is confirmed to be affected by CVE-2021-21928, requiring immediate attention to secure the systems.

Exploitation Mechanism

Attackers can exploit this vulnerability by making authenticated HTTP requests at the 'mac_filter' parameter, allowing unauthorized SQL injection attempts.

Mitigation and Prevention

Learn about immediate steps to take and long-term security practices to safeguard against CVE-2021-21928.

Immediate Steps to Take

Users are advised to apply patches and update to secure versions to mitigate the risk of SQL injection attacks through the 'mac_filter' parameter.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and educating users about SQL injection risks are recommended for maintaining a robust security posture.

Patching and Updates

Regularly monitor vendor updates and apply security patches promptly to address known vulnerabilities and strengthen system defenses.