CVE-2023-2673 : Security Advisory and Response

This CVE-2023-2673 relates to an improper input validation vulnerability found in PHOENIX CONTACT FL/TC MGUARD Family across multiple versions. The vulnerability may enable UDP packets to bypass filter rules, potentially granting unauthorized access to the connected device which could be exploited for flooding attacks.

Understanding CVE-2023-2673

The vulnerability identified in CVE-2023-2673 poses a medium-level threat with a base score of 5.3 according to the CVSS v3.1 metrics due to improper input validation in the PHOENIX CONTACT FL/TC MGUARD Family.

What is CVE-2023-2673?

CVE-2023-2673 is an improper input validation vulnerability in the PHOENIX CONTACT FL/TC MGUARD Family, allowing UDP packets to evade filter rules and gain access to connected devices, potentially leading to flooding attacks.

The Impact of CVE-2023-2673

The impact of CVE-2023-2673 could result in unauthorized access to the solely connected device behind the MGUARD, enabling malicious actors to carry out flooding attacks.

Technical Details of CVE-2023-2673

The vulnerability arises from improper input validation in the PHOENIX CONTACT FL/TC MGUARD Family, affecting versions including FL MGUARD 2102, FL MGUARD 4102 PCI, FL MGUARD 4102 PCIE, FL MGUARD 4302, and several others.

Vulnerability Description

The vulnerability allows UDP packets to bypass filter rules, potentially leading to unauthorized access and flooding attacks on connected devices.

Affected Systems and Versions

Multiple versions of the PHOENIX CONTACT FL/TC MGUARD Family are impacted, including versions less than or equal to 10.1.1 and 8.9.0.

Exploitation Mechanism

The vulnerability can be exploited by sending UDP packets that circumvent filter rules, gaining access to connected devices behind the MGUARD.

Mitigation and Prevention

To address CVE-2023-2673, immediate steps need to be taken to secure affected systems and prevent potential exploitation through flooding attacks.

Immediate Steps to Take

Implement firewall rules to restrict unauthorized access
Monitor network traffic for suspicious UDP packet activity
Apply vendor patches or updates to mitigate the vulnerability

Long-Term Security Practices

Regularly update and patch all software and firmware
Conduct security audits and assessments to identify vulnerabilities
Train staff on cybersecurity best practices to prevent future incidents

Patching and Updates

It is crucial to apply patches and updates provided by PHOENIX CONTACT to address the improper input validation vulnerability in the FL/TC MGUARD Family and enhance system security.