CVE-2021-3774 : Exploit Details and Defense Strategies

A vulnerability has been discovered in the Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) that could potentially expose sensitive data to remote attackers. This CVE, assigned the ID CVE-2021-3774, allows attackers to obtain the Wi-Fi SSID and password configured by the user via Http/JSON plain request.

Understanding CVE-2021-3774

This section provides insights into the nature of the vulnerability and its potential impact.

What is CVE-2021-3774?

The CVE-2021-3774 vulnerability affects the Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) running version 3.1.3 and earlier. It creates an open Wi-Fi Access Point without necessary security measures during initial setup, potentially enabling unauthorized access.

The Impact of CVE-2021-3774

This vulnerability poses a high risk as it allows remote attackers to extract sensitive information, compromising confidentiality and integrity without requiring any user privileges. The availability is not impacted.

Technical Details of CVE-2021-3774

Explore the specifics of the vulnerability, including affected systems, exploitation methods, and mitigation strategies.

Vulnerability Description

The issue stems from the lack of encryption in the initial setup process of the MSS550X, leaving the Wi-Fi network vulnerable to unauthorized access and data extraction.

Affected Systems and Versions

The vulnerability affects Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) versions up to and including 3.1.3, prior to the release of version 3.2.3, which resolves the issue.

Exploitation Mechanism

Remote attackers can exploit this vulnerability through Http/JSON plain requests to the open Wi-Fi Access Point, intercepting sensitive data configured by users through the Meross app.

Mitigation and Prevention

Discover the steps to address the CVE-2021-3774 vulnerability and secure affected systems against potential cyber threats.

Immediate Steps to Take

Users are advised to update their Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X) to version 3.2.3 to mitigate the security risk and prevent unauthorized access.

Long-Term Security Practices

Implement secure Wi-Fi configuration practices, including encryption of sensitive data, regular software updates, and network monitoring to enhance cybersecurity.

Patching and Updates

Meross has released version 3.2.3 to address CVE-2021-3774, providing users with a secure firmware update to protect against potential data breaches.