CVE-2023-33013 : Security Advisory and Response

This article provides detailed information about CVE-2023-33013, a post-authentication command injection vulnerability found in the NTP feature of Zyxel NBG6604 firmware version V1.01(ABIR.1)C0.

Understanding CVE-2023-33013

This section delves into the key aspects of CVE-2023-33013.

What is CVE-2023-33013?

CVE-2023-33013 refers to a post-authentication command injection vulnerability in the NTP feature of Zyxel NBG6604 firmware version V1.01(ABIR.1)C0. This vulnerability could allow an authenticated attacker to execute OS commands remotely via a crafted HTTP request.

The Impact of CVE-2023-33013

The vulnerability poses a high risk with a CVSSv3.1 base score of 8.8, indicating high confidentiality, integrity, and availability impact. The attack complexity is low, and a low level of privileges is required for exploitation.

Technical Details of CVE-2023-33013

This section covers the technical specifics of CVE-2023-33013.

Vulnerability Description

The issue stems from improper neutralization of special elements used in an OS command, leading to command injection in the NTP feature of the affected firmware version.

Affected Systems and Versions

Zyxel NBG6604 firmware version V1.01(ABIR.1)C0 is impacted by this vulnerability.

Exploitation Mechanism

An authenticated attacker can exploit this vulnerability by sending a malicious HTTP request to execute OS commands remotely.

Mitigation and Prevention

To address CVE-2023-33013, users and administrators should take the following steps:

Immediate Steps to Take

Apply patches and updates provided by Zyxel to fix the vulnerability.
Restrict network access to vulnerable devices.

Long-Term Security Practices

Regularly update firmware and software to mitigate future vulnerabilities.
Implement network segmentation and access controls.

Patching and Updates

Stay informed about security advisories from Zyxel and apply relevant patches promptly.