CVE-2023-1749 : Exploit Details and Defense Strategies

This CVE record pertains to the lack of proper access control in certain versions of Nexx Smart Home devices, allowing attackers with a valid NexxHome deviceId to send API requests that the affected devices would execute.

Understanding CVE-2023-1749

This section delves into the details of CVE-2023-1749, shedding light on the vulnerability and its potential impact.

What is CVE-2023-1749?

CVE-2023-1749 highlights the vulnerability present in Nexx Smart Home devices, where attackers can exploit the lack of proper access control to execute actions using API requests.

The Impact of CVE-2023-1749

The impact of this vulnerability is significant, as it could potentially allow unauthorized individuals to control Nexx Smart Home devices, leading to privacy breaches and compromised security.

Technical Details of CVE-2023-1749

In this section, we will explore the technical aspects of CVE-2023-1749, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in Nexx Smart Home devices is categorized under CWE-639: Authorization Bypass Through User-Controlled Key, indicating a critical flaw in access control mechanisms.

Affected Systems and Versions

The following Nexx Smart Home devices are affected by CVE-2023-1749:

Smart Alarm NXAL-100 (up to version nxal100v-p1-9-1)
Smart Plug NXPG-100W (up to version nxpg100cv4-0-0)
Garage Door Controller NXG-100B, NXG-200 (up to version nxg200v-p3-4-1)

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging a valid NexxHome deviceId to send API requests to the affected devices, which execute the commands without proper access control.

Mitigation and Prevention

This section outlines the steps that can be taken to mitigate the risks posed by CVE-2023-1749 and prevent unauthorized access to Nexx Smart Home devices.

Immediate Steps to Take

Users of Nexx Smart Home devices are advised to review and update their access control settings, ensure devices are running the latest firmware, and monitor for any suspicious activity on their networks.

Long-Term Security Practices

Implementing strong password policies, regular security audits, and network segmentation can help enhance the overall security posture and prevent similar vulnerabilities in the future.

Patching and Updates

It is crucial for users to stay informed about security patches released by Nexx for their Smart Home devices. Applying timely updates and patches can address known vulnerabilities and strengthen the security of the devices.