CVE-2021-38687 : Vulnerability Insights and Analysis

A stack buffer overflow vulnerability has been reported to affect QNAP NAS running Surveillance Station. This vulnerability allows attackers to execute arbitrary code on the affected systems.

Understanding CVE-2021-38687

This CVE refers to a stack buffer overflow vulnerability in Surveillance Station by QNAP Systems Inc., impacting certain versions of the software.

What is CVE-2021-38687?

The CVE-2021-38687 vulnerability is a stack buffer overflow issue in QNAP Surveillance Station that could lead to arbitrary code execution when exploited by attackers.

The Impact of CVE-2021-38687

The impact of this vulnerability is rated as HIGH according to CVSS v3.1 metrics. Attackers can exploit this issue remotely, leading to a compromise of confidentiality, integrity, and availability.

Technical Details of CVE-2021-38687

This section covers the technical aspects related to CVE-2021-38687, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers to overflow stack buffers, potentially leading to the execution of malicious code on the target QNAP NAS running affected versions of Surveillance Station.

Affected Systems and Versions

Surveillance Station versions less than the following are affected:

QTS 5.0 (64 bit): Surveillance Station 5.2.0.4.2 (2021/10/26) and earlier
QTS 5.0 (32 bit): Surveillance Station 5.2.0.3.2 (2021/10/26) and earlier
QTS 4.3.6 (64 bit): Surveillance Station 5.1.5.4.6 (2021/10/26) and earlier
QTS 4.3.6 (32 bit): Surveillance Station 5.1.5.3.6 (2021/10/26) and earlier
QTS 4.3.3: Surveillance Station 5.1.5.3.6 (2021/10/26) and earlier

Exploitation Mechanism

The vulnerability has a HIGH complexity for exploitation and does not require privileges. Attackers can exploit this issue over the network without user interaction, impacting confidentiality, integrity, and availability.

Mitigation and Prevention

In response to CVE-2021-38687, follow these steps to mitigate the risk and enhance the security of your QNAP NAS running Surveillance Station.

Immediate Steps to Take

Update Surveillance Station to versions that are not affected by the vulnerability.
Apply patches provided by QNAP Systems Inc. promptly to fix the vulnerability.

Long-Term Security Practices

Regularly update and patch your Surveillance Station to protect against potential threats.
Implement network security measures to restrict unauthorized access to your QNAP NAS.

Patching and Updates

Ensure that your Surveillance Station is running the latest versions to address security vulnerabilities and protect your system from potential attacks.