CVE-2020-23622 : Vulnerability Insights and Analysis

4thline cling versions 2.0.0 through 2.1.2 are vulnerable to a denial of service attack via an unchecked UPnP protocol CALLBACK parameter.

Understanding CVE-2020-23622

This CVE describes a vulnerability in the UPnP protocol implementation in 4thline cling versions 2.0.0 through 2.1.2, allowing remote attackers to trigger a denial of service by exploiting an unchecked parameter in the request header.

What is CVE-2020-23622?

The vulnerability in the UPnP protocol in 4thline cling versions 2.0.0 through 2.1.2 enables remote attackers to execute a denial of service attack by leveraging an unvalidated CALLBACK parameter in the request header.

The Impact of CVE-2020-23622

Remote attackers can exploit this vulnerability to cause a denial of service on affected systems.

Technical Details of CVE-2020-23622

4thline cling versions 2.0.0 through 2.1.2 are susceptible to a denial of service attack due to an unchecked parameter in the UPnP protocol implementation.

Vulnerability Description

The vulnerability allows remote attackers to disrupt services by sending malicious requests with an unchecked CALLBACK parameter.

Affected Systems and Versions

Product: 4thline cling
Versions: 2.0.0 through 2.1.2

Exploitation Mechanism

Attackers exploit the unchecked CALLBACK parameter in the UPnP protocol request header to trigger a denial of service.

Mitigation and Prevention

To address CVE-2020-23622, consider the following steps:

Immediate Steps to Take

Disable UPnP services if not essential
Implement network segmentation to limit exposure
Monitor network traffic for suspicious activity

Long-Term Security Practices

Regularly update and patch UPnP-enabled devices
Conduct security assessments and penetration testing

Patching and Updates

Apply patches or updates provided by 4thline for the affected versions.