CVE-2021-21968 : Security Advisory and Response

A file write vulnerability has been identified in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34, allowing arbitrary file overwrite through a specially-crafted MQTT payload. This could be exploited by an attacker through a man-in-the-middle attack.

Understanding CVE-2021-21968

This section will delve into the details of the vulnerability, its impact, technical description, affected systems, exploitation mechanism, and mitigation steps.

What is CVE-2021-21968?

The vulnerability affects Sealevel Systems, Inc. SeaConnect 370W v1.3.34 by enabling unauthorized parties to overwrite files using a malicious MQTT payload.

The Impact of CVE-2021-21968

The high severity vulnerability poses risks to confidentiality, integrity, and availability, allowing attackers to perform arbitrary file overwrites in affected systems.

Technical Details of CVE-2021-21968

Let's explore the technical aspects of the vulnerability further.

Vulnerability Description

The flaw arises from improper input validation, leading to unauthorized file modifications through crafted MQTT packets.

Affected Systems and Versions

Sealevel Systems, Inc. SeaConnect 370W v1.3.34 is impacted by this vulnerability, particularly affecting version 1.3.34.

Exploitation Mechanism

Attackers can leverage a man-in-the-middle attack to intercept MQTT payloads and perform illicit file overwrites within the SeaConnect 370W v1.3.34 system.

Mitigation and Prevention

Discover the essential steps to secure your systems against CVE-2021-21968.

Immediate Steps to Take

To address the vulnerability promptly, users should apply vendor-provided patches, if available, and closely monitor network traffic for any suspicious activity.

Long-Term Security Practices

Implement robust network security protocols, including encryption methods, network segmentation, and access control policies to prevent unauthorized access.

Patching and Updates

Regularly update firmware and security patches to fortify systems against potential threats and address known vulnerabilities.