CVE-2020-28873 : Security Advisory and Response

Fluxbb 1.5.11 is affected by a denial of service (DoS) vulnerability that can be exploited by sending an extremely long password via the user login form. This can lead to CPU and memory exhaustion on the server.

Understanding CVE-2020-28873

This CVE identifies a specific vulnerability in Fluxbb 1.5.11 that can be exploited to cause a denial of service attack.

What is CVE-2020-28873?

CVE-2020-28873 is a vulnerability in Fluxbb 1.5.11 that allows attackers to trigger a denial of service condition by sending an excessively long password through the user login form.

The Impact of CVE-2020-28873

The exploitation of this vulnerability can result in CPU and memory exhaustion on the server, potentially leading to service disruption or unavailability.

Technical Details of CVE-2020-28873

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Fluxbb 1.5.11 arises from the handling of extremely long passwords during the login process, causing resource exhaustion on the server.

Affected Systems and Versions

System: Fluxbb 1.5.11
Versions: All versions of Fluxbb 1.5.11 are affected.

Exploitation Mechanism

Attackers exploit this vulnerability by submitting an exceptionally long password via the user login form, triggering excessive resource consumption during the password hashing process.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2020-28873, consider the following steps:

Immediate Steps to Take

Implement input validation to restrict the length of passwords.
Monitor server resources for unusual spikes in CPU and memory usage.

Long-Term Security Practices

Regularly update Fluxbb to the latest version to patch known vulnerabilities.
Conduct security audits to identify and mitigate potential vulnerabilities in the system.

Patching and Updates

Apply patches or updates provided by Fluxbb to address the vulnerability and enhance system security.