CVE-2022-46351 Explained : Impact and Mitigation

A vulnerability has been identified in SCALANCE X204RNA devices by Siemens, potentially leading to a denial of service condition on affected products.

Understanding CVE-2022-46351

This section delves into the details of the CVE-2022-46351 vulnerability.

What is CVE-2022-46351?

The vulnerability exists in SCALANCE X204RNA (HSR) and SCALANCE X204RNA EEC (PRP/HSR) devices with versions prior to V3.2.7. It arises from specially crafted PROFINET DCP packets, capable of causing denial of service on affected products within a local Ethernet segment at Layer 2.

The Impact of CVE-2022-46351

The exploitation of this vulnerability could lead to a denial of service condition, affecting the availability of the SCALANCE X204RNA devices, and potentially disrupting network operations.

Technical Details of CVE-2022-46351

Explore the technical aspects related to CVE-2022-46351 below.

Vulnerability Description

The vulnerability stems from the handling of specific PROFINET DCP packets, making the affected SCALANCE X204RNA devices susceptible to denial of service attacks.

Affected Systems and Versions

The vulnerability affects multiple Siemens products including SCALANCE X204RNA (HSR), SCALANCE X204RNA (PRP), SCALANCE X204RNA EEC (HSR), SCALANCE X204RNA EEC (PRP), and SCALANCE X204RNA EEC (PRP/HSR) with versions older than V3.2.7.

Exploitation Mechanism

Exploiting this vulnerability involves sending specially crafted PROFINET DCP packets to the target devices, triggering a denial of service condition on a local Ethernet segment.

Mitigation and Prevention

Learn about the steps to mitigate and prevent CVE-2022-46351 below.

Immediate Steps to Take

It is recommended to apply the necessary security updates provided by Siemens to address the vulnerability promptly. Additionally, network segmentation and access control measures can help reduce the impact of such vulnerabilities.

Long-Term Security Practices

Implementing robust network security practices, regularly updating firmware, and monitoring network traffic can enhance the overall security posture and resilience against potential threats.

Patching and Updates

Stay informed about security advisories from Siemens and ensure timely application of patches to protect the SCALANCE X204RNA devices from known vulnerabilities.