CVE-2021-28806 Explained : Impact and Mitigation
Learn about CVE-2021-28806, a DOM-Based XSS vulnerability affecting QNAP NAS devices running QTS and QuTS hero. Understand the impact, technical details, and mitigation steps to secure your system.
A DOM-based XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. This vulnerability allows attackers to inject malicious code into the system. Learn more about the impact, technical details, and mitigation steps below.
Understanding CVE-2021-28806
This section provides insights into the nature and impact of the DOM-Based XSS vulnerability in QTS and QuTS hero.
What is CVE-2021-28806?
CVE-2021-28806 is a DOM-based XSS vulnerability affecting QNAP NAS devices running QTS and QuTS hero, allowing attackers to inject malicious code.
The Impact of CVE-2021-28806
The vulnerability poses a medium severity risk with a base score of 5.7, potentially leading to high confidentiality impact if exploited.
Technical Details of CVE-2021-28806
This section delves into the technical aspects of the vulnerability, including the description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability allows attackers to execute malicious code through a DOM-based XSS attack on QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428, QuTS hero versions prior to h4.5.2.1638 Build 20210414, and QuTScloud versions prior to c4.5.5.1656 Build 20210503.
Affected Systems and Versions
- QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428
- QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 Build 20210414
- QNAP Systems Inc. QuTScloud versions prior to c4.5.5.1656 Build 20210503
Exploitation Mechanism
The vulnerability can be exploited through a network-based attack, requiring low privileges and user interaction.
Mitigation and Prevention
This section offers guidance on addressing the CVE-2021-28806 vulnerability to enhance system security.
Immediate Steps to Take
- Update QTS to version 4.5.3.1652 Build 20210428 or later
- Upgrade QuTS hero to version h4.5.2.1638 Build 20210414 or later
- Patch QuTScloud to version c4.5.5.1656 Build 20210503 or later
Long-Term Security Practices
- Regularly monitor security advisories from QNAP Systems Inc.
- Implement web security best practices to prevent XSS attacks
Patching and Updates
Ensure timely installation of security patches and updates provided by QNAP Systems Inc. to mitigate vulnerabilities.