CVE-2022-3480 : What You Need to Know

A detailed analysis of the Denial-of-Service vulnerability in PHOENIX CONTACT mGuard product family.

Understanding CVE-2022-3480

This section provides insights into the nature and impact of the CVE-2022-3480 vulnerability.

What is CVE-2022-3480?

CVE-2022-3480 is a Denial-of-Service vulnerability affecting PHOENIX CONTACT FL MGUARD and TC MGUARD devices with versions below 8.9.0. Attackers could exploit this flaw by flooding the devices with unauthenticated HTTPS connections.

The Impact of CVE-2022-3480

This vulnerability poses a high risk as remote, unauthenticated attackers can cause a denial-of-service on affected devices, leading to service disruption.

Technical Details of CVE-2022-3480

In this section, we delve into the specifics of the vulnerability including how it can be exploited and the systems affected.

Vulnerability Description

A remote attacker could trigger a denial-of-service by overwhelming PHOENIX CONTACT mGuard devices with unauthenticated HTTPS connections from multiple source IPs, impacting availability significantly.

Affected Systems and Versions

The vulnerability affects PHOENIX CONTACT FL MGUARD and TC MGUARD devices with firmware versions below 8.9.0.

Exploitation Mechanism

The flaw can be exploited by sending a large number of unauthenticated HTTPS connections from various source IPs, bypassing firewall limits.

Mitigation and Prevention

This section outlines the steps to mitigate the risks associated with CVE-2022-3480.

Immediate Steps to Take

Upgrade all impacted PHOENIX CONTACT mGuard devices to firmware version 8.9.0 or higher to prevent exploitation of this vulnerability.

Long-Term Security Practices

Ensure timely installation of security updates and regularly review and update firewall configurations to enhance network security.

Patching and Updates

Stay vigilant for firmware updates released by PHOENIX CONTACT and apply patches promptly to protect against potential attacks.