CVE-2021-20143 : Security Advisory and Response
Learn about CVE-2021-20143, a command injection flaw impacting Gryphon Tower routers. This vulnerability allows remote attackers to execute commands as root on the device.
A command injection vulnerability, identified as CVE-2021-20143, impacts Gryphon Tower routers. This vulnerability allows an unauthenticated remote attacker to execute commands as root on the device by sending specially crafted packets to the controller_server service on port 9999.
Understanding CVE-2021-20143
This section delves into the details of the CVE-2021-20143 vulnerability.
What is CVE-2021-20143?
The CVE-2021-20143 vulnerability is an unauthenticated command injection flaw in the parameters of operation 48 in the controller_server service on Gryphon Tower routers. It permits malicious actors to gain root access on the device.
The Impact of CVE-2021-20143
The impact of this vulnerability is severe as it allows unauthenticated attackers on the same network to execute commands with root privileges, posing a significant security risk.
Technical Details of CVE-2021-20143
This section provides technical insights into the CVE-2021-20143 vulnerability.
Vulnerability Description
The vulnerability arises from inadequate input validation in the controller_server service, enabling attackers to inject and execute arbitrary commands.
Affected Systems and Versions
The Gryphon Tower routers are affected by this vulnerability, specifically versions up to and including 04.0004.12.
Exploitation Mechanism
By sending a specifically designed packet to the controller_server service on port 9999, an unauthenticated remote attacker can trigger the command injection flaw, gaining unauthorized root access.
Mitigation and Prevention
Protecting systems from CVE-2021-20143 is crucial to ensure network security.
Immediate Steps to Take
Immediately patch affected Gryphon Tower routers to the latest firmware version to mitigate the vulnerability.
Long-Term Security Practices
Enforce strict network segmentation and access controls to minimize the impact of such vulnerabilities in the future.
Patching and Updates
Regularly check for security updates and apply patches promptly to address known vulnerabilities and enhance overall system security.