CVE-2021-21918 : Security Advisory and Response

This article provides an overview of CVE-2021-21918, a vulnerability that could allow an attacker to perform SQL injection attacks through a specially-crafted HTTP request.

Understanding CVE-2021-21918

CVE-2021-21918 is a high-severity vulnerability affecting Advantech's R-SeeNet product, version 2.4.15 (30.07.2021).

What is CVE-2021-21918?

A specially-crafted HTTP request can lead to SQL injection, where an authenticated attacker can exploit the 'name_filter' parameter using the super-administrator account.

The Impact of CVE-2021-21918

With a CVSS base score of 7.7 (High), the vulnerability poses a significant risk to confidentiality due to the potential for unauthorized SQL injection attacks.

Technical Details of CVE-2021-21918

The following details outline the vulnerability and its implications.

Vulnerability Description

The vulnerability arises from improper neutralization of special elements used in an SQL command, allowing attackers to manipulate database queries.

Affected Systems and Versions

Advantech R-SeeNet version 2.4.15 (30.07.2021) is confirmed to be impacted by this issue.

Exploitation Mechanism

Attackers can exploit the vulnerability by crafting malicious HTTP requests targeting the 'name_filter' parameter.

Mitigation and Prevention

To safeguard systems from CVE-2021-21918, immediate steps and long-term security practices are recommended.

Immediate Steps to Take

Update to a patched version of Advantech R-SeeNet to mitigate the vulnerability.

Long-Term Security Practices

Regularly monitor for security advisories and apply updates promptly to prevent exploitation.

Patching and Updates

Stay informed about vendor patches and security recommendations to address known vulnerabilities effectively.