CVE-2023-4452 : Vulnerability Insights and Analysis

This CVE-2023-4452 article provides information about a Web Server Buffer Overflow Vulnerability affecting Moxa's EDR-810, EDR-G902, and EDR-G903 Series devices. The vulnerability could be exploited by malicious users to trigger a denial-of-service situation due to insufficient input validation in the URI.

Understanding CVE-2023-4452

This section delves deeper into the details of the CVE-2023-4452 vulnerability, discussing its impact, technical aspects, affected systems, and mitigation strategies.

What is CVE-2023-4452?

The CVE-2023-4452 vulnerability is categorized as a denial-of-service vulnerability that affects Moxa's EDR-810, EDR-G902, and EDR-G903 Series devices. The issue arises from insufficient input validation in the URI, potentially allowing attackers to cause the devices to reboot.

The Impact of CVE-2023-4452

The impact of CVE-2023-4452, with a CVSS v3.1 base score of 6.5 (Medium severity), includes the risk of overflow buffers and the possibility of triggering a denial-of-service condition on the affected devices.

Technical Details of CVE-2023-4452

This section provides a more technical overview of the vulnerability, including a description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in the EDR-810, EDR-G902, and EDR-G903 Series stems from insufficient input validation in the URI, allowing malicious users to trigger a denial-of-service situation by causing the devices to reboot.

Affected Systems and Versions

EDR-810 Series: Versions up to 5.12.28 are affected.
EDR-G902 Series: Versions up to 5.7.20 are affected.
EDR-G903 Series: Versions up to 5.7.20 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted requests to the affected devices, leveraging the insufficient input validation in the URI to instigate a device reboot.

Mitigation and Prevention

In response to CVE-2023-4452, Moxa has developed solutions to address the vulnerability and protect the impacted products. Users are advised to take immediate action to secure their systems.

Immediate Steps to Take

For EDR-810 Series: Upgrade to firmware v5.12.29 or later.
For EDR-G902 Series: Upgrade to firmware v5.7.21 or later.
For EDR-G903 Series: Upgrade to firmware v5.7.21 or later.

Long-Term Security Practices

Implementing robust security measures, such as regular software updates, network segmentation, and access controls, can help mitigate the risk of similar vulnerabilities in the future.

Patching and Updates

Ensuring that the firmware of the affected devices is regularly updated with the latest patches and security enhancements is crucial to safeguard against known vulnerabilities like CVE-2023-4452.