CVE-2021-33822 : Vulnerability Insights and Analysis

An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22 where attackers can exploit it to launch a denial-of-service attack using the slowhttptest tool.

Understanding CVE-2021-33822

This CVE-2021-33822 pertains to a vulnerability found in the 4GEE ROUTER HH70VB Version HH70_E1_02.00_22 that allows attackers to execute a denial-of-service attack.

What is CVE-2021-33822?

CVE-2021-33822 is a security flaw in the 4GEE ROUTER HH70VB Version HH70_E1_02.00_22 that enables threat actors to employ the slowhttptest tool to send incomplete HTTP requests, causing the web server to exhaust its resources and become unresponsive.

The Impact of CVE-2021-33822

The exploitation of this vulnerability can result in a denial-of-service (DoS) condition where the web server becomes overwhelmed by waiting for packets to complete connections, leading to a complete resource exhaustion.

Technical Details of CVE-2021-33822

This section provides deeper insights into the vulnerability, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows malicious actors to leverage the slowhttptest tool to send incomplete HTTP requests, ultimately causing the web server to go into a denial-of-service state due to resource exhaustion.

Affected Systems and Versions

4GEE ROUTER HH70VB Version HH70_E1_02.00_22 is the specific version impacted by this CVE, potentially affecting systems running this version.

Exploitation Mechanism

By utilizing the slowhttptest tool, threat actors can send incomplete HTTP requests to the web server, forcing it to wait endlessly for packets to complete connections until resources are fully depleted.

Mitigation and Prevention

To safeguard your systems from CVE-2021-33822, it is crucial to take immediate and long-term security measures along with patching and updates.

Immediate Steps to Take

Implement network monitoring, filter malicious traffic, and apply security patches regularly to mitigate the risk of a DoS attack via CVE-2021-33822.

Long-Term Security Practices

Enhance network security protocols, conduct regular security audits, and train staff to recognize and respond to potential threats effectively.

Patching and Updates

Keep abreast of security advisories from the device vendor and apply recommended patches promptly to close the vulnerability gap exposed by CVE-2021-33822.