CVE-2018-19945 : What You Need to Know

A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6. This vulnerability allows for renaming arbitrary files on the target system due to improper limitations of a pathname to a restricted directory. QNAP has addressed this issue in later versions, specifically QTS 4.3.6.0895 build 20190328 and QTS 4.3.4.0899 build 20190322. It's important to note that this vulnerability does not impact QTS 4.4.x or QTS 4.5.x.

Understanding CVE-2018-19945

This CVE involves improper limitations of a pathname to a restricted directory in QTS.

What is CVE-2018-19945?

The vulnerability in CVE-2018-19945 is caused by inadequate restrictions on the pathname to a restricted directory in QNAP devices running QTS 4.3.4 to 4.3.6.

The Impact of CVE-2018-19945

Exploiting this vulnerability allows attackers to rename any files on the targeted system, potentially leading to unauthorized access and data manipulation.

Technical Details of CVE-2018-19945

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from improper limitations on the pathname to a restricted directory, enabling unauthorized file renaming.

Affected Systems and Versions

QNAP devices running QTS 4.3.4 to 4.3.6

Exploitation Mechanism

Attackers can exploit this vulnerability to rename files on the target system, potentially compromising data integrity and security.

Mitigation and Prevention

Protecting systems from CVE-2018-19945 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected QNAP devices to the patched versions: QTS 4.3.6.0895 build 20190328 or QTS 4.3.4.0899 build 20190322

Long-Term Security Practices

Regularly update QTS to the latest versions
Implement proper access controls and input validation mechanisms

Patching and Updates

Ensure all QNAP devices are running QTS 4.3.6.0895 build 20190328 or QTS 4.3.4.0899 build 20190322 to mitigate the vulnerability.