CVE-2021-45937 : Vulnerability Insights and Analysis

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow vulnerability that can be exploited through specific functions.

Understanding CVE-2021-45937

wolfSSL wolfMQTT 1.9 is affected by a heap-based buffer overflow vulnerability in the MqttClient_DecodePacket function, which is called from MqttClient_WaitType and MqttClient_Connect.

What is CVE-2021-45937?

The vulnerability in wolfSSL wolfMQTT 1.9 allows an attacker to trigger a heap-based buffer overflow.

The Impact of CVE-2021-45937

A successful exploit of this vulnerability can lead to arbitrary code execution or denial of service.

Technical Details of CVE-2021-45937

CVE ID: CVE-2021-45937

Vulnerability Description

The vulnerability is a heap-based buffer overflow in MqttClient_DecodePacket.

Affected Systems and Versions

Product: wolfSSL wolfMQTT 1.9
Vendor: Not applicable
Affected Version: Not applicable

Exploitation Mechanism

Exploitation can be achieved through functions MqttClient_WaitType and MqttClient_Connect.

Mitigation and Prevention

Steps to address and prevent the vulnerability in wolfSSL wolfMQTT 1.9.

Immediate Steps to Take

Implement the provided patches or updates from the vendor.
Monitor security advisories for any related patches.
Consider network segmentation to limit exposure.

Long-Term Security Practices

Regularly update software and firmware to the latest versions.
Conduct security assessments and penetration testing regularly.
Employ network firewalls and intrusion detection/prevention systems.

Patching and Updates

Apply the latest patches released by wolfSSL to address the heap-based buffer overflow vulnerability.