CVE-2022-21155 : What You Need to Know
Discover the impact of CVE-2022-21155 affecting Fernhill SCADA Server. Learn about the vulnerability, its technical details, and mitigation steps.
A vulnerability in Fernhill SCADA Server Version 3.77 and earlier could allow an attacker to disrupt the server process by sending a specially crafted packet.
Understanding CVE-2022-21155
This CVE, discovered by ExCraft and Fernhill Software, affects Fernhill's SCADA Server on multiple platforms.
What is CVE-2022-21155?
The vulnerability in Fernhill SCADA Server Version 3.77 and earlier can be exploited by sending a malicious packet, leading to server process termination.
The Impact of CVE-2022-21155
With a CVSS base score of 7.5, this vulnerability has a high impact on availability, potentially causing service disruptions.
Technical Details of CVE-2022-21155
The vulnerability is categorized under CWE-400, involving uncontrolled resource consumption. It requires low attack complexity and network access.
Vulnerability Description
A specially crafted packet can trigger an exception, causing the server process to exit, affecting the availability of the SCADA Server.
Affected Systems and Versions
Fernhill SCADA Server Version 3.77 and earlier running on Windows, Linux, and macOS are vulnerable to this exploit.
Exploitation Mechanism
Attackers can exploit this vulnerability remotely over the network without requiring any user interaction.
Mitigation and Prevention
To mitigate CVE-2022-21155, users are strongly advised to upgrade to Fernhill SCADA Server Version 3.78 or later.
Immediate Steps to Take
Upgrade to Version 3.78 or above to patch the vulnerability and prevent potential attacks.
Long-Term Security Practices
Regularly update and patch your SCADA Server software to ensure protection against known vulnerabilities.
Patching and Updates
For detailed guidance on applying the upgrade and addressing the vulnerability, users can contact Fernhill Software directly for assistance.