CVE-2021-20989 : Exploit Details and Defense Strategies
Learn about CVE-2021-20989 affecting Fibaro Home Center 2 and Lite devices with firmware version 4.600, enabling unauthorized access to the web management interface. Find mitigation steps and preventive measures.
This CVE pertains to Fibaro Home Center devices with firmware version 4.600 and older, presenting an issue with insufficient remote access server authorization.
Understanding CVE-2021-20989
This section delves into the details of CVE-2021-20989.
What is CVE-2021-20989?
The vulnerability occurs in Fibaro Home Center 2 and Lite devices, where SSH connections to the Fibaro cloud can be intercepted via a DNS spoofing attack. This could enable unauthorized access to the web management interface.
The Impact of CVE-2021-20989
With a CVSS base score of 5.9, this vulnerability has a medium severity level. It could lead to a high impact on the confidentiality of the system, requiring knowledge of authorization credentials for further exploitation.
Technical Details of CVE-2021-20989
In this section, we'll explore the technical aspects of CVE-2021-20989.
Vulnerability Description
The vulnerability involves insufficient remote access server authorization, allowing malicious actors to intercept SSH connections and gain unauthorized access to the web management interface.
Affected Systems and Versions
Fibaro Home Center 2 and Lite devices with firmware version 4.600 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability through DNS spoofing attacks to intercept SSH connections to the Fibaro cloud and establish unauthorized access to the web management interface.
Mitigation and Prevention
Here we discuss the steps to mitigate and prevent exploitation of CVE-2021-20989.
Immediate Steps to Take
Users of affected devices should update to the latest firmware version provided by Fibaro to patch the vulnerability. Additionally, monitoring network traffic for any suspicious activity is recommended.
Long-Term Security Practices
Implementing network segmentation, using strong authentication mechanisms, and regular security audits can help enhance the overall security posture.
Patching and Updates
Stay informed about security updates from Fibaro and promptly apply patches to address known vulnerabilities.