CVE-2020-16230 : What You Need to Know

Ewon Flexy and Cosy devices prior to version 14.1 are vulnerable to a permissive cross-domain policy issue that could be exploited by an attacker with local access and high privileges.

Understanding CVE-2020-16230

This CVE identifies a security vulnerability in Ewon Flexy and Cosy devices that could allow an attacker to inject scripts into the Cross-origin Resource Sharing (CORS) configuration.

What is CVE-2020-16230?

Ewon Flexy and Cosy devices prior to version 14.1 have a vulnerability that enables an attacker to abuse wildcards in domain requests, potentially leading to the retrieval of limited confidential information.

The Impact of CVE-2020-16230

The vulnerability could allow an attacker to inject scripts into the CORS configuration, leading to the retrieval of sensitive data through sniffing.

Technical Details of CVE-2020-16230

Ewon Flexy and Cosy devices are affected by this vulnerability.

Vulnerability Description

The issue arises from the use of wildcards in domain requests, enabling an attacker to inject scripts into the CORS configuration.

Affected Systems and Versions

Product: HMS Networks Ewon Flexy and Cosy
Versions affected: All versions prior to 14.1

Exploitation Mechanism

An attacker with local access and high privileges can exploit the vulnerability by injecting scripts into the CORS configuration.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-16230.

Immediate Steps to Take

Update Ewon Flexy and Cosy devices to version 14.1 or above to address the vulnerability.
Restrict physical access to the devices to prevent unauthorized manipulation.

Long-Term Security Practices

Regularly monitor and audit CORS configurations for any unauthorized changes.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Apply patches and updates provided by the vendor to ensure the security of Ewon Flexy and Cosy devices.