CVE-2023-49874 : Exploit Details and Defense Strategies
Learn about CVE-2023-49874, an IDOR vulnerability in Mattermost allowing guests to update private playbook tasks. Find impact details, affected versions, and mitigation steps.
A detailed analysis of CVE-2023-49874 focusing on the impact, technical details, and mitigation strategies.
Understanding CVE-2023-49874
CVE-2023-49874 refers to an Improper Direct Object Reference (IDOR) vulnerability found in Mattermost that allows a guest user to update tasks of a private playbook run if they know the run ID.
What is CVE-2023-49874?
The vulnerability occurs due to Mattermost's failure to check user permissions properly, enabling unauthorized guests to manipulate tasks within a private playbook run, compromising the confidentiality and integrity of the data.
The Impact of CVE-2023-49874
With a CVSS base score of 4.3 (Medium severity), the vulnerability poses a moderate risk, potentially leading to unauthorized access and tampering with sensitive information in affected versions of Mattermost.
Technical Details of CVE-2023-49874
The vulnerability arises from a lack of proper access control mechanisms within Mattermost, allowing guests to interfere with private playbook runs.
Vulnerability Description
Mattermost fails to validate the user's role before permitting task updates in a private playbook run, leading to unauthorized manipulation by guest users.
Affected Systems and Versions
Versions up to 9.2.1 of Mattermost are affected by this vulnerability, while versions 9.2.2, 8.1.6, 9.0.4, 9.1.3, and 7.8.15 onwards are unaffected.
Exploitation Mechanism
Exploiting this vulnerability requires knowledge of the run ID within a private playbook, enabling guest users to manipulate the tasks if they bypass the permission checks.
Mitigation and Prevention
Addressing CVE-2023-49874 involves immediate actions and long-term security practices to prevent unauthorized access and data tampering.
Immediate Steps to Take
Update Mattermost Server to versions 9.2.2, 8.1.6, 9.0.4, 9.1.3, 7.8.15, or the latest releases to mitigate the vulnerability and enhance access controls.
Long-Term Security Practices
Regularly review and enhance access control mechanisms to prevent similar IDOR vulnerabilities, conduct security assessments, and educate users on data protection best practices.
Patching and Updates
Stay informed about security updates from Mattermost and promptly apply patches to ensure your system is protected from known vulnerabilities.