CVE-2021-21960 : What You Need to Know

A stack-based buffer overflow vulnerability has been identified in the LLMNR functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. This vulnerability allows an attacker to execute remote code by sending a specially-crafted network packet.

Understanding CVE-2021-21960

This section provides insights into the impact and technical details of CVE-2021-21960.

What is CVE-2021-21960?

The CVE-2021-21960 vulnerability is a stack-based buffer overflow in Sealevel Systems, Inc. SeaConnect 370W v1.3.34 that enables remote code execution through malicious network packets.

The Impact of CVE-2021-21960

The impact of this critical vulnerability is rated with a CVSS base score of 10 out of 10, indicating high-severity consequences. Attackers can exploit this flaw without requiring any special privileges, leading to confidentiality, integrity, and availability compromises.

Technical Details of CVE-2021-21960

Explore the technical aspects involved in CVE-2021-21960 to understand the vulnerability better.

Vulnerability Description

The vulnerability arises due to a stack-based buffer overflow in the SeaConnect 370W v1.3.34 LLMNR functionality. By crafting and sending a malicious network packet, an attacker can trigger remote code execution.

Affected Systems and Versions

The affected product is Sealevel, specifically the SeaConnect 370W v1.3.34 version.

Exploitation Mechanism

Attackers exploit this vulnerability by sending a specially-crafted network packet to the target system, triggering the buffer overflow and gaining remote code execution capabilities.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-21960 and prevent potential exploitation.

Immediate Steps to Take

Immediately apply security patches provided by Sealevel Systems, Inc. to address the CVE-2021-21960 vulnerability. Additionally, consider implementing network security measures to block potential attack vectors.

Long-Term Security Practices

To enhance long-term security, maintain updated security protocols, conduct regular security audits, and educate staff on identifying and mitigating security vulnerabilities.

Patching and Updates

Regularly check for security updates and patches released by Sealevel Systems, Inc. to address vulnerabilities and enhance the overall security posture of the affected systems.