CVE-2021-44053 : Security Advisory and Response

A cross-site scripting vulnerability affecting QNAP devices running QTS, QuTS hero, and QuTScloud.

Understanding CVE-2021-44053

A vulnerability that allows remote attackers to inject malicious code into QNAP devices.

What is CVE-2021-44053?

This CVE identifies a cross-site scripting (XSS) vulnerability present in QNAP devices running QTS, QuTS hero, and QuTScloud, permitting remote attackers to inject harmful scripts.

The Impact of CVE-2021-44053

CVSS Score: 5.7 (Medium Severity)
Attack Vector: Network
Confidentiality Impact: High
Privileges Required: Low
User Interaction: Required
Exploiting this vulnerability can lead to the injection of malicious code by remote attackers.

Technical Details of CVE-2021-44053

Details related to the vulnerability, affected systems, and exploitation methods.

Vulnerability Description

The vulnerability is classified as CWE-79 (Cross-Site Scripting).

Affected Systems and Versions

QTS versions less than 4.5.4.1991 build 20220329 and 5.0.0.1986 build 20220324.
QuTS hero versions less than h5.0.0.1986 build 20220324 and h4.5.4.1971 build 20220310.
QuTScloud versions less than c5.0.1.1949.

Exploitation Mechanism

Attack Complexity: Low
Scope: Unchanged
Requirements: Low privileges required, user interaction necessary.

Mitigation and Prevention

Key steps to mitigate the vulnerability and prevent potential attacks.

Immediate Steps to Take

Update affected QNAP devices to the fixed versions mentioned in the solution.
Monitor for any signs of unauthorized access or malicious activities.
Educate users on safe browsing practices to avoid XSS attacks.

Long-Term Security Practices

Regularly update and patch the QNAP devices to the latest firmware.
Implement network and web application firewalls to filter out malicious traffic.
Conduct security assessments and audits periodically.

Patching and Updates

Ensure all QTS, QuTS hero, and QuTScloud devices are running versions QTS 4.5.4.1991 build 20220329 and later, QTS 5.0.0.1986 build 20220324 and later, QuTS hero h5.0.0.1986 build 20220324 and later, QuTS hero h4.5.4.1971 build 20220310 and later, QuTScloud c5.0.1.1949 and later.