CVE-2023-27263 : Security Advisory and Response

This CVE-2023-27263 was assigned by Mattermost and was published on February 27, 2023. It involves a missing permissions check in the /plugins/playbooks/api/v0/runs API in Mattermost, allowing attackers to list and view playbooks not belonging to their team.

Understanding CVE-2023-27263

This section delves into what CVE-2023-27263 entails, its impact, technical details, and mitigation strategies.

What is CVE-2023-27263?

CVE-2023-27263, also known as IDOR (Insecure Direct Object Reference): Accessing playbook runs via the Playbooks Runs API, is a vulnerability in Mattermost that stems from a missing permissions check in the /plugins/playbooks/api/v0/runs API.

The Impact of CVE-2023-27263

This vulnerability allows malicious actors to list and view playbooks from teams they are not members of, potentially leading to unauthorized access and data exposure.

Technical Details of CVE-2023-27263

Understanding the vulnerability description, affected systems, versions, and exploitation mechanism is crucial for implementing appropriate mitigation measures.

Vulnerability Description

The missing permissions check in the /plugins/playbooks/api/v0/runs API permits attackers to view and list playbooks from teams they do not belong to, posing a security risk for affected Mattermost users.

Affected Systems and Versions

Mattermost versions 7.5.1, 7.4.0, and 7.1.4 are impacted by this vulnerability, making it essential for users of these versions to take immediate action to secure their systems.

Exploitation Mechanism

By exploiting the IDOR vulnerability in the Playbooks Runs API, threat actors can gain unauthorized access to sensitive information and manipulate data within the Mattermost platform.

Mitigation and Prevention

Taking proactive steps to mitigate the risks posed by CVE-2023-27263 is crucial for ensuring the security of Mattermost installations.

Immediate Steps to Take

Users are advised to update their Mattermost installations to versions 7.5.2, 7.4.1, 7.1.5, or higher to address the vulnerability and prevent unauthorized access via the Playbooks Runs API.

Long-Term Security Practices

Implementing robust access control mechanisms, conducting regular security assessments, and staying informed about security updates are essential practices to enhance the overall security posture of Mattermost instances.

Patching and Updates

Regularly applying software patches and staying up to date with security advisories from Mattermost can help protect against known vulnerabilities and minimize the risk of exploitation.