CVE-2021-33823 : Security Advisory and Response
Discover the impact of CVE-2021-33823, a denial-of-service vulnerability in MOXA Mgate MB3180 Version 2.1 Build 18113012. Learn about affected systems, exploitation, and mitigation steps.
An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012, where an attacker could exploit the vulnerability by sending a huge amount of TCP SYN packets to exhaust the web service's resources, leading to a denial-of-service condition.
Understanding CVE-2021-33823
This section will provide insights into the nature and impact of the CVE-2021-33823 vulnerability.
What is CVE-2021-33823?
The CVE-2021-33823 vulnerability exists in MOXA Mgate MB3180 Version 2.1 Build 18113012, allowing attackers to launch a denial-of-service attack by overwhelming the web service with TCP SYN packets.
The Impact of CVE-2021-33823
This vulnerability could result in a denial-of-service situation where the web server becomes unresponsive due to the exhaustion of resources caused by the influx of malicious TCP SYN packets.
Technical Details of CVE-2021-33823
In this section, we will delve into the technical aspects of the CVE-2021-33823 vulnerability.
Vulnerability Description
The vulnerability enables attackers to flood the web service with a large number of TCP SYN packets, causing it to become unresponsive and leading to a denial-of-service condition.
Affected Systems and Versions
MOXA Mgate MB3180 Version 2.1 Build 18113012 is specifically affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit CVE-2021-33823 by sending a significant volume of TCP SYN packets to overwhelm the web service's resources and disrupt its normal operation.
Mitigation and Prevention
This section outlines the necessary steps to mitigate the risks associated with CVE-2021-33823 and prevent potential attacks.
Immediate Steps to Take
It is recommended to apply security patches provided by the vendor and implement network traffic monitoring to detect and mitigate any abnormal traffic patterns.
Long-Term Security Practices
Enhancing network security measures, such as implementing access control lists and firewall rules, can help prevent unauthorized access and mitigate the impact of denial-of-service attacks.
Patching and Updates
Regularly updating the firmware and software of the affected systems, along with staying informed about security advisories from the vendor, is crucial to addressing known vulnerabilities and strengthening the overall security posture.