CVE-2021-25671 Explained : Impact and Mitigation

A vulnerability has been identified in Siemens RWG1.M12, RWG1.M12D, and RWG1.M8 where sending specially crafted ARP packets could lead to a partial denial-of-service condition.

Understanding CVE-2021-25671

This CVE impacts Siemens products RWG1.M12, RWG1.M12D, and RWG1.M8 due to a vulnerability that allows an attacker to create a denial-of-service situation.

What is CVE-2021-25671?

The CVE-2021-25671 vulnerability affects Siemens products RWG1.M12, RWG1.M12D, and RWG1.M8 by allowing an attacker to launch a partial denial-of-service attack via specially crafted ARP packets.

The Impact of CVE-2021-25671

Exploiting this vulnerability may cause affected devices to experience a partial denial-of-service, disrupting normal operations until a system restart is performed.

Technical Details of CVE-2021-25671

This section dives into the technical aspects of the CVE.

Vulnerability Description

The vulnerability in RWG1.M12, RWG1.M12D, and RWG1.M8 allows attackers to send crafted ARP packets leading to a partial denial-of-service.

Affected Systems and Versions

All versions prior to V1.16.16 of RWG1.M12, RWG1.M12D, and RWG1.M8 are affected by this security flaw.

Exploitation Mechanism

By sending manipulated ARP packets to vulnerable devices, threat actors can trigger the denial-of-service condition.

Mitigation and Prevention

Protect your systems against CVE-2021-25671 with these security measures.

Immediate Steps to Take

It is recommended to apply vendor-provided patches and follow best security practices to mitigate the risk of exploitation.

Long-Term Security Practices

Implement network segmentation, access controls, and monitor ARP traffic to enhance the security posture of your environment.

Patching and Updates

Ensure all affected Siemens devices are updated to version V1.16.16 or later to eliminate the vulnerability.