CVE-2021-28807 : Vulnerability Insights and Analysis

A post-authentication reflected XSS vulnerability has been reported to affect QNAP NAS running Q’center, allowing remote attackers to inject malicious code. This CVE was published on June 3, 2021, by Andrea Cappa.

Understanding CVE-2021-28807

This section will cover what CVE-2021-28807 is, its impact, technical details, mitigation, and prevention methods.

What is CVE-2021-28807?

CVE-2021-28807 is a post-authentication reflected XSS vulnerability that affects QNAP NAS devices running Q’center, enabling remote attackers to insert malicious code.

The Impact of CVE-2021-28807

The vulnerability has a CVSS base score of 7.7 (High severity) with a confidentiality impact of High, making it critical for affected systems.

Technical Details of CVE-2021-28807

This section will delve into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows remote attackers to exploit a post-authentication reflected XSS vulnerability in Q’center, potentially leading to code injection attacks.

Affected Systems and Versions

The vulnerability affects Q’center versions less than v1.12.1012 on QTS 4.5.3, less than v1.10.1004 on QTS 4.3.6 and QTS 4.3.3, as well as QuTS hero h4.5.2 and QuTScloud c4.5.4.

Exploitation Mechanism

Attackers can exploit the vulnerability over a network with low complexity and low privileges required, resulting in a change of scope.

Mitigation and Prevention

In this section, we will cover the immediate steps to take and long-term security practices to enhance protection against CVE-2021-28807.

Immediate Steps to Take

Users should update Q’center to the patched versions: QTS 4.5.3 v1.12.1012, QTS 4.3.6 v1.10.1004, QTS 4.3.3 v1.10.1004, QuTS hero h4.5.2 v1.12.1012, and QuTScloud c4.5.4 v1.12.1012.

Long-Term Security Practices

Implement security best practices, conduct regular security assessments, and educate users on safe browsing habits to prevent XSS attacks.

Patching and Updates

Regularly check for security updates and apply patches promptly to safeguard against known vulnerabilities.