CVE-2022-45139 : Exploit Details and Defense Strategies

This article provides details about CVE-2022-45139 affecting WAGO devices due to a CORS misconfiguration, allowing a malicious third-party webserver to exploit sensitive information.

Understanding CVE-2022-45139

CVE-2022-45139 highlights an origin validation error in WAGO devices caused by a CORS misconfiguration, posing a risk of sensitive data exposure to unauthorized entities.

What is CVE-2022-45139?

A CORS Misconfiguration in the web-based management allows malicious third-party webservers to misuse basic information pages, potentially leading to the disclosure of sensitive device details such as CPU diagnostics.

The Impact of CVE-2022-45139

The impact of this vulnerability is limited to a small subset of confidentiality, requiring attention due to the risk of unauthorized access to critical device information.

Technical Details of CVE-2022-45139

This section covers the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The origin validation error in WAGO devices, triggered by a CORS misconfiguration, enables unauthorized webservers to exploit basic information pages.

Affected Systems and Versions

The vulnerability affects various WAGO products with versions less than or equal to FW22, such as Compact Controller CC100, Edge Controller, PFC100, PFC200, and Touch Panel 600 Series.

Exploitation Mechanism

Exploiting the CORS misconfiguration allows malicious third parties to access and misuse critical device information, potentially compromising confidentiality.

Mitigation and Prevention

To safeguard against CVE-2022-45139, immediate steps must be taken along with long-term security practices to enhance resilience.

Immediate Steps to Take

Users are advised to implement security updates, restrict access to web-based management, and monitor for any unauthorized access attempts.

Long-Term Security Practices

Regular security audits, employee training on secure configurations, and timely installation of security patches are essential for long-term protection.

Patching and Updates

Vendors like WAGO should release security patches and firmware updates to address the CORS misconfiguration, ensuring device security.