CVE-2021-37199 : Exploit Details and Defense Strategies

A vulnerability has been identified in SINUMERIK 808D and SINUMERIK 828D devices. Attackers could exploit this flaw to cause a denial-of-service on affected devices.

Understanding CVE-2021-37199

This CVE discloses a vulnerability in Siemens' SINUMERIK 808D and SINUMERIK 828D products that could lead to a denial-of-service attack.

What is CVE-2021-37199?

A vulnerability in SINUMERIK 808D (All versions) and SINUMERIK 828D (All versions < V4.95) could be exploited by sending specially crafted packets to port 102/tcp, resulting in a denial-of-service.

The Impact of CVE-2021-37199

The vulnerability could allow attackers to disrupt the normal operation of affected devices, leading to a denial-of-service condition and potential service interruptions.

Technical Details of CVE-2021-37199

This section provides technical insights into the vulnerability affecting SINUMERIK devices.

Vulnerability Description

The flaw allows attackers to send malicious packets to port 102/tcp, triggering a denial-of-service on SINUMERIK 808D and 828D devices.

Affected Systems and Versions

SINUMERIK 808D (All versions) and SINUMERIK 828D (All versions < V4.95) are affected by this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability by sending specially crafted packets to port 102/tcp, impacting the normal operation of the devices.

Mitigation and Prevention

Learn how to protect your systems from the CVE-2021-37199 vulnerability.

Immediate Steps to Take

Implement firewall rules to restrict access to port 102/tcp, and monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update firmware and software to patch known vulnerabilities and enhance the security posture of SINUMERIK devices.

Patching and Updates

Stay informed about security updates released by Siemens for SINUMERIK 808D and SINUMERIK 828D devices to mitigate the risks associated with this vulnerability.