CVE-2021-34568 : Security Advisory and Response

A detailed analysis of CVE-2021-34568 highlighting the vulnerability in WAGO I/O-Check Service, its impacts, technical details, and mitigation steps.

Understanding CVE-2021-34568

This section provides insights into the critical vulnerability identified as CVE-2021-34568 affecting WAGO I/O-Check Service.

What is CVE-2021-34568?

CVE-2021-34568 refers to a vulnerability in WAGO I/O-Check Service found in multiple products. It allows an unauthenticated remote attacker to send a specially crafted packet containing OS commands resulting in a denial of service.

The Impact of CVE-2021-34568

The vulnerability poses a significant threat as it enables attackers to trigger a denial of service by exploiting the WAGO I/O-Check Service flaw.

Technical Details of CVE-2021-34568

This section delves into the technical aspects of CVE-2021-34568, including vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability involves an unauthenticated remote attacker sending a malicious packet with OS commands leading to a denial of service through the WAGO I/O-Check Service.

Affected Systems and Versions

Products such as 750-81xx/xxx-xxxFW, 750-82xx/xxx-xxx, 752-8303/8000-0002, 762-4xxx, 762-5xxx, and 762-6xxx by WAGO are affected, particularly up to version FW1 FW18 Patch 2.

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted packets with OS commands to the WAGO I/O-Check Service, impacting the system's availability.

Mitigation and Prevention

This section outlines the necessary steps to mitigate the risks associated with CVE-2021-34568 and prevent potential exploits.

Immediate Steps to Take

Organizations should apply relevant security patches from WAGO to address the vulnerability. Additionally, monitoring network traffic for malicious activities is crucial.

Long-Term Security Practices

Implementing robust network security measures, conducting regular vulnerability assessments, and enhancing authentication protocols can strengthen the overall security posture.

Patching and Updates

Regularly updating and patching the affected systems with the latest firmware provided by WAGO is essential to prevent exploitation of the vulnerability.