CVE-2021-37183 : Security Advisory and Response

A vulnerability has been identified in SINEMA Remote Connect Server that allows an unauthenticated attacker to cause a Denial-of-Service condition in managed devices. This CVE has been published on 2021-09-14 by Siemens.

Understanding CVE-2021-37183

This section provides insights into the impact, technical details, and mitigation steps related to CVE-2021-37183.

What is CVE-2021-37183?

CVE-2021-37183 is a vulnerability in SINEMA Remote Connect Server that enables unauthorized individuals to exploit send-to-sleep notifications, resulting in a Denial-of-Service issue on managed devices.

The Impact of CVE-2021-37183

The vulnerability allows unauthenticated attackers within the same network to abuse notifications, leading to a Denial-of-Service scenario. This could disrupt the availability and functionality of managed devices, posing a security risk within the network.

Technical Details of CVE-2021-37183

Let's delve into the specifics of the vulnerability, including the impacted systems, exploitation method, and affected versions.

Vulnerability Description

The flaw in SINEMA Remote Connect Server (All versions < V3.0 SP2) permits the sending of malicious send-to-sleep notifications, which can be maliciously utilized by unauthorized users to trigger a Denial-of-Service state on managed devices.

Affected Systems and Versions

The vulnerability impacts all versions of SINEMA Remote Connect Server that are earlier than V3.0 SP2, exposing them to the risk of a Denial-of-Service attack by unauthorized entities within the network.

Exploitation Mechanism

By leveraging the flaw in the affected software, unauthenticated attackers in the same network as the vulnerable system can manipulate send-to-sleep notifications to disrupt the normal operations of managed devices.

Mitigation and Prevention

Discover essential steps to mitigate the risks associated with CVE-2021-37183 and reinforce the security of affected systems.

Immediate Steps to Take

Network administrators are advised to implement network segmentation, restrict access to the affected server, and monitor for any abnormal network behavior that may indicate a potential attack.

Long-Term Security Practices

Regularly update the SINEMA Remote Connect Server to versions beyond V3.0 SP2, conduct security assessments, and educate users on identifying suspicious activities to enhance the overall security posture.

Patching and Updates

Stay informed about security bulletins from Siemens, apply patches promptly, and ensure that the software is up-to-date to safeguard against potential threats.