CVE-2021-21935 : What You Need to Know

A detailed overview of CVE-2021-21935 focusing on the SQL injection vulnerability impacting Advantech R-SeeNet.

Understanding CVE-2021-21935

This CVE describes a SQL injection vulnerability in Advantech R-SeeNet, allowing attackers to execute malicious actions.

What is CVE-2021-21935?

A specially-crafted HTTP request can trigger an SQL injection flaw in Advantech R-SeeNet at the 'host_alt_filter2' parameter.

The Impact of CVE-2021-21935

The vulnerability has a CVSS base score of 7.7 (High), with high confidentiality impact. Attackers can exploit it via authenticated HTTP requests or cross-site request forgery.

Technical Details of CVE-2021-21935

Exploring the specifics of the SQL injection vulnerability affecting Advantech R-SeeNet.

Vulnerability Description

An attacker can inject SQL commands through crafted HTTP requests to the vulnerable parameter, compromising data integrity.

Affected Systems and Versions

Advantech R-SeeNet 2.4.15 (30.07.2021) is affected by this vulnerability, exposing systems to potential exploitation.

Exploitation Mechanism

By sending specially-crafted HTTP requests to the 'host_alt_filter2' parameter, threat actors can execute SQL injection attacks.

Mitigation and Prevention

Measures to reduce the risk associated with CVE-2021-21935 and secure systems against SQL injection attacks.

Immediate Steps to Take

Ensure access controls, input validation, and parameterized queries are implemented to mitigate the SQL injection risk.

Long-Term Security Practices

Regular security training, code reviews, and penetration testing can enhance the overall security posture and prevent similar vulnerabilities.

Patching and Updates

Apply vendor-supplied patches promptly, stay informed about security advisories, and monitor for any suspicious activities.