CVE-2018-21250 : What You Need to Know

A vulnerability has been found in versions 5.2.2, 5.1.2, and 4.10.4 of the Mattermost Server that could be exploited by attackers remotely to cause a denial of service by manipulating image dimensions.

Understanding CVE-2018-21250

This CVE identifies a vulnerability in Mattermost Server versions 5.2.2, 5.1.2, and 4.10.4 that allows remote attackers to trigger a denial of service attack through memory consumption.

What is CVE-2018-21250?

This vulnerability in Mattermost Server versions 5.2.2, 5.1.2, and 4.10.4 enables attackers to exploit image dimension manipulation to cause a denial of service by consuming excessive memory.

The Impact of CVE-2018-21250

The exploitation of this vulnerability can lead to a denial of service attack on affected systems, potentially disrupting services and causing downtime.

Technical Details of CVE-2018-21250

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in Mattermost Server versions 5.2.2, 5.1.2, and 4.10.4 allows remote attackers to conduct a denial of service attack by manipulating image dimensions, resulting in high memory consumption.

Affected Systems and Versions

Mattermost Server versions 5.2.2, 5.1.2, and 4.10.4

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by manipulating image dimensions in a malicious manner, leading to excessive memory consumption and subsequent denial of service.

Mitigation and Prevention

Protecting systems from CVE-2018-21250 is crucial to maintaining security.

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 prevent remote attacks.

Patching and Updates

Ensure timely installation of security updates and patches to mitigate the risk of exploitation.