CVE-2021-44052 : Vulnerability Insights and Analysis

An improper link resolution before file access ('Link Following') vulnerability reported to affect QNAP devices running QuTScloud, QuTS hero, and QTS, allowing remote attackers to access unintended files. CVE-2021-44052 has a CVSS base score of 6.5.

Understanding CVE-2021-44052

What is CVE-2021-44052?

This CVE discloses an improper link resolution vulnerability in QNAP devices, enabling remote attackers to traverse the file system and potentially access or modify unexpected files.

The Impact of CVE-2021-44052

The vulnerability's exploitation may lead to unauthorized access to critical files or data on affected QNAP systems.

Technical Details of CVE-2021-44052

Vulnerability Description

The vulnerability allows attackers to perform unauthorized file system traversal and access, compromising system integrity.

Affected Systems and Versions

QuTScloud less than c5.0.1.1998
QuTS hero less than h4.5.4.1971 build 20220310 and h5.0.0.1986 build 20220324
QTS less than 4.3.4.1976, 4.3.3.1945, 4.2.6, 4.3.6.1965, 5.0.0.1986, and 4.5.4.1991 build dates specified.

Exploitation Mechanism

Attackers exploit the vulnerability by initiating unauthorized file access through improper link resolution in affected QNAP systems.

Mitigation and Prevention

Immediate Steps to Take

Update to the fixed versions mentioned in the solution.
Implement network security measures to restrict unauthorized access.

Long-Term Security Practices

Regularly monitor and audit file access permissions.
Conduct security training and awareness programs for system users.

Patching and Updates

Ensure timely installation of security patches provided by QNAP Systems Inc.