CVE-2019-20880 : What You Need to Know

A vulnerability has been identified in versions 5.8.0, 5.7.2, 5.6.5, and 4.10.7 of Mattermost Server, allowing attackers to launch a denial of service attack through the OpenGraph feature.

Understanding CVE-2019-20880

This CVE identifies a vulnerability in Mattermost Server versions that can lead to a denial of service attack.

What is CVE-2019-20880?

CVE-2019-20880 is a vulnerability found in Mattermost Server versions 5.8.0, 5.7.2, 5.6.5, and 4.10.7, enabling attackers to exploit the OpenGraph feature and cause excessive memory consumption, potentially leading to a denial of service attack.

The Impact of CVE-2019-20880

Exploiting this vulnerability can result in a denial of service attack by consuming excessive memory, affecting the availability and performance of the Mattermost Server.

Technical Details of CVE-2019-20880

This section provides technical details of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to trigger a denial of service attack by exploiting the OpenGraph feature in Mattermost Server versions 5.8.0, 5.7.2, 5.6.5, and 4.10.7.

Affected Systems and Versions

Mattermost Server versions 5.8.0, 5.7.2, 5.6.5, and 4.10.7

Exploitation Mechanism

Attackers can exploit the OpenGraph feature to cause excessive memory consumption, leading to a denial of service attack.

Mitigation and Prevention

Protecting systems from CVE-2019-20880 is crucial to prevent potential attacks.

Immediate Steps to Take

Update Mattermost Server to a patched version that addresses the vulnerability.
Monitor system resources for any unusual memory consumption.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network security measures to detect and prevent denial of service attacks.

Patching and Updates

Apply the latest security updates provided by Mattermost to mitigate the CVE-2019-20880 vulnerability.