CVE-2021-38674 : Exploit Details and Defense Strategies

A cross-site scripting (XSS) vulnerability has been reported to affect QTS, QuTS hero, and QuTScloud. This vulnerability allows remote attackers to inject malicious code. Immediate actions are required to prevent exploitation and maintain system security.

Understanding CVE-2021-38674

This CVE describes a reflected XSS vulnerability impacting QNAP Systems Inc.'s QuTS hero, QTS, and QuTScloud products. The vulnerability can be exploited by remote attackers to inject malicious code.

What is CVE-2021-38674?

CVE-2021-38674 is a cross-site scripting (XSS) vulnerability found in QNAP Systems Inc.'s QuTS hero, QTS, and QuTScloud products. The vulnerability allows attackers to insert and execute malicious scripts on webpages viewed by other users.

The Impact of CVE-2021-38674

The impact of this vulnerability is considered medium with a CVSS base score of 4.2. It can result in the injection of harmful scripts, leading to various security risks such as data theft, unauthorized access, and potential system compromise.

Technical Details of CVE-2021-38674

This section provides detailed information on the vulnerability.

Vulnerability Description

The vulnerability in TFTP allows for reflected cross-site scripting (XSS) attacks on affected systems, enabling threat actors to manipulate user interactions and compromise system integrity.

Affected Systems and Versions

QuTS hero: Versions less than h4.5.4.1771 build 20210825
QTS: Versions less than 4.5.4.1787 build 20210910
QuTScloud: Versions less than c4.5.7.1864

Exploitation Mechanism

Attackers can exploit the vulnerability over a network with high complexity, requiring user interaction. The impact level is considered medium with low confidentiality and integrity impacts.

Mitigation and Prevention

It is crucial to take immediate steps to secure systems and prevent exploitation.

Immediate Steps to Take

Update affected products to the fixed versions: QuTS hero h4.5.4.1771 build 20210825 and later, QTS 4.5.4.1787 build 20210910 and later, QuTScloud c4.5.7.1864 and later.
Implement security best practices to mitigate XSS vulnerabilities.

Long-Term Security Practices

Regularly monitor for security advisories and updates from QNAP Systems Inc.
Conduct security training to educate users on identifying and avoiding XSS attacks.

Patching and Updates

Stay informed about security patches released by QNAP Systems Inc. and promptly apply them to protect systems from known vulnerabilities.