CVE-2021-38403 : Security Advisory and Response

Delta Electronics DIALink versions 1.2.4.0 and prior are vulnerable to cross-site scripting, allowing an authenticated attacker to inject arbitrary JavaScript code.

Understanding CVE-2021-38403

This CVE identifies a cross-site scripting vulnerability in Delta Electronics DIALink versions 1.2.4.0 and below.

What is CVE-2021-38403?

Delta Electronics DIALink versions 1.2.4.0 and prior are susceptible to cross-site scripting. An authenticated attacker could exploit this by injecting arbitrary JavaScript code into the parameter supplier of the API maintenance, potentially enabling remote code execution.

The Impact of CVE-2021-38403

With a CVSS base score of 5.5, this medium-severity vulnerability requires high privileges but has low impacts on confidentiality and integrity. The attack complexity is low, and user interaction is not needed. As a result, an attacker could achieve remote code execution.

Technical Details of CVE-2021-38403

This section delves into the vulnerability, affected systems, and exploitation methods.

Vulnerability Description

The vulnerability in Delta Electronics DIALink allows an authenticated attacker to insert arbitrary JavaScript code into the API maintenance parameter 'supplier,' paving the way for potential remote code execution.

Affected Systems and Versions

Delta Electronics DIALink versions 1.2.4.0 and prior are impacted by this vulnerability.

Exploitation Mechanism

By leveraging the cross-site scripting flaw in DIALink, an attacker with high privileges can inject malicious JavaScript code, opening the possibility of executing remote commands.

Mitigation and Prevention

To address CVE-2021-38403, immediate steps and long-term security practices are crucial.

Immediate Steps to Take

Delta Electronics is currently working on an update to mitigate the vulnerabilities present in DIALink versions. Users are advised to apply the patch promptly upon release to prevent exploitation.

Long-Term Security Practices

Maintaining up-to-date software versions, implementing secure coding practices, and conducting regular security assessments are essential for enhancing the overall security posture.

Patching and Updates

Stay informed about security advisories from Delta Electronics and apply patches promptly to help safeguard systems against potential threats.