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CVE-2021-21917 : Vulnerability Insights and Analysis

Discover the impact and technical details of CVE-2021-21917, a high-severity SQL injection vulnerability in Advantech R-SeeNet 2.4.15. Learn how to mitigate the risk and protect your systems.

An SQL injection vulnerability has been identified in Advantech R-SeeNet 2.4.15, allowing attackers to execute malicious SQL commands through specially-crafted HTTP requests. This could result in unauthorized access and data manipulation.

Understanding CVE-2021-21917

This section provides an in-depth look at the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-21917?

The CVE-2021-21917 vulnerability refers to an SQL injection flaw present in the 'group_list' page of Advantech R-SeeNet 2.4.15. Attackers can exploit this weakness by sending crafted HTTP requests with the 'ord' parameter, leading to unauthorized SQL commands execution.

The Impact of CVE-2021-21917

With a CVSS base score of 7.7 (High severity), this vulnerability poses a significant risk. It allows attackers to access or modify sensitive data within the affected system, potentially leading to data breaches, data loss, or further exploitation.

Technical Details of CVE-2021-21917

Let's delve into the specifics of this security issue, including how systems are affected and how threat actors can leverage it.

Vulnerability Description

The vulnerability arises from improper handling of user inputs in the 'group_list' page, enabling attackers to insert malicious SQL queries. This can be triggered through a specially-crafted HTTP request, allowing for unauthorized access.

Affected Systems and Versions

Advantech R-SeeNet 2.4.15 (30.07.2021) is confirmed to be affected by this vulnerability. Systems with this version installed are at risk of exploitation via SQL injection attacks.

Exploitation Mechanism

Attackers can exploit CVE-2021-21917 by sending crafted HTTP requests with specific parameters, such as 'ord,' to inject malicious SQL commands. This can be achieved by authenticated users or through cross-site request forgery tactics.

Mitigation and Prevention

Protecting systems from CVE-2021-21917 requires immediate action and long-term security measures. Here's what you need to do:

Immediate Steps to Take

        Apply security patches provided by Advantech promptly to fix the vulnerability.
        Monitor network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

        Conduct regular security audits to identify and address any potential vulnerabilities in the system.
        Implement strict input validation mechanisms to prevent SQL injection attacks.

Patching and Updates

Stay informed about security updates released by Advantech and apply them as soon as they are available to ensure protection against known vulnerabilities.

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