CVE-2023-3593 : Security Advisory and Response

This CVE-2023-3593 was published by Mattermost on July 17, 2023. The vulnerability allows an attacker to crash the server by exploiting a markdown validation issue in Mattermost.

Understanding CVE-2023-3593

The CVE-2023-3593 vulnerability in Mattermost arises from a failure to properly validate markdown input, enabling attackers to manipulate the server through a specially crafted markdown input.

What is CVE-2023-3593?

CVE-2023-3593 is a vulnerability in Mattermost that permits attackers to crash the server by exploiting the markdown validation weakness, posing a risk to system availability.

The Impact of CVE-2023-3593

The impact of CVE-2023-3593 is rated as medium severity with a base score of 4.3. The vulnerability can be exploited with low attack complexity and privileges required, affecting the availability of the system.

Technical Details of CVE-2023-3593

This vulnerability is classified under CWE-400 (Uncontrolled Resource Consumption) and has a CVSS v3.1 base score of 4.3, indicating a medium severity issue with low attack complexity and network-based attack vector.

Vulnerability Description

The vulnerability in Mattermost stems from a lack of proper markdown validation, allowing attackers to crash the server using specially crafted markdown inputs.

Affected Systems and Versions

Mattermost versions up to and including 7.8.6
Mattermost versions up to and including 7.9.4
Mattermost versions up to and including 7.10.2

Exploitation Mechanism

Attackers can exploit this vulnerability by submitting manipulated markdown inputs to the affected Mattermost versions, leading to a server crash.

Mitigation and Prevention

In order to mitigate the risks associated with CVE-2023-3593, users are advised to take the following steps:

Immediate Steps to Take

Update Mattermost to versions 7.8.7, 7.9.5, 7.10.3, or higher to patch the vulnerability and prevent potential server crashes.

Long-Term Security Practices

Implement regular security updates and patches for Mattermost to address potential vulnerabilities and enhance system security.

Patching and Updates

Stay informed about security advisories from Mattermost and promptly apply any necessary updates or fixes to protect against known vulnerabilities.