CVE-2021-20142 : Vulnerability Insights and Analysis

A command injection vulnerability, identified as CVE-2021-20142, poses a significant threat to Gryphon Tower routers. Exploiting this vulnerability allows unauthenticated remote attackers to execute commands with root privileges on the affected device. Read on to understand the impact, technical details, and mitigation strategies associated with this CVE.

Understanding CVE-2021-20142

This section delves into the specifics of the CVE-2021-20142 vulnerability.

What is CVE-2021-20142?

The vulnerability stems from an unauthenticated command injection flaw in the controller_server service on Gryphon Tower routers. Attackers within the same network can exploit this flaw by sending a crafted packet to the service on port 9999.

The Impact of CVE-2021-20142

The vulnerability allows unauthenticated remote attackers to run arbitrary commands as root on the compromised Gryphon Tower router. This could lead to full device compromise and potential unauthorized access to sensitive information.

Technical Details of CVE-2021-20142

Explore the technical aspects and implications of CVE-2021-20142 in this section.

Vulnerability Description

The flaw resides in operation 41 parameters of the controller_server service, enabling command execution with elevated privileges.

Affected Systems and Versions

Gryphon Tower routers with versions less than or equal to 04.0004.12 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability by sending a specially crafted packet to the controller_server service on port 9999, gaining unauthorized root access.

Mitigation and Prevention

Discover the necessary steps to mitigate the risks associated with CVE-2021-20142.

Immediate Steps to Take

Immediately restrict network access to the vulnerable Gryphon Tower routers and monitor for any suspicious activities.

Long-Term Security Practices

Implement network segmentation, regular security audits, and apply the principle of least privilege to enhance overall security posture.

Patching and Updates

Vendor patches or firmware updates addressing the CVE-2021-20142 vulnerability should be promptly applied to affected Gryphon Tower routers to mitigate risks and secure the network.