CVE-2023-5968 : Security Advisory and Response

This CVE-2023-5968 pertains to a vulnerability identified in Mattermost that allows the inclusion of the password hash in the response body when updating the username.

Understanding CVE-2023-5968

This section delves into the details, impact, technical aspects, and mitigation strategies surrounding CVE-2023-5968.

What is CVE-2023-5968?

The vulnerability in Mattermost occurs due to the failure to properly sanitize the user object while updating the username. This leads to the inadvertent inclusion of the password hash in the response body, exposing sensitive information to unauthorized actors.

The Impact of CVE-2023-5968

The impact of CVE-2023-5968 is classified as medium severity. It has a CVSS base score of 4.9, with a high confidentiality impact and requirements of high privileges for exploitation. The attack complexity is low, and the attack vector is via the network.

Technical Details of CVE-2023-5968

A deeper dive into the technical aspects of the vulnerability, including its description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in Mattermost results from inadequate sanitization of the user object during username updates, leading to the exposure of the password hash in the response body.

Affected Systems and Versions

Versions of Mattermost up to 9.0.0 are affected by this vulnerability, with versions 7.8.11, 8.0.3, 8.1.2, and 9.0.0 being susceptible. Subsequent versions such as 7.8.12, 8.0.4, 8.1.3, and 9.0.1 have been patched and are unaffected.

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to retrieve sensitive information by manipulating the username update functionality in affected versions of Mattermost.

Mitigation and Prevention

This section outlines the necessary steps to mitigate the risks associated with CVE-2023-5968 and prevent potential exploitation.

Immediate Steps to Take

To address CVE-2023-5968, it is crucial to update the Mattermost Server to versions 7.8.12, 8.0.4, 8.1.3, 9.0.1, or higher. This will patch the vulnerability and prevent the inadvertent exposure of password hashes in the response body.

Long-Term Security Practices

Implement robust security practices within your organization, including regular security audits, user training on best practices, and proactive vulnerability management to mitigate future risks.

Patching and Updates

Stay vigilant for security updates and patches released by Mattermost to address vulnerabilities promptly. Regularly update your systems to the latest secure versions to ensure ongoing protection against potential threats.

By understanding the impact of CVE-2023-5968 and taking proactive measures to address it, organizations can enhance their cybersecurity posture and safeguard sensitive information within their systems.