CVE-2023-1775 : What You Need to Know
CVE-2023-1775 impacts Mattermost in High Availability setups, exposing sensitive data to users with connected Websocket clients. Learn about the vulnerability and mitigation steps.
This CVE-2023-1775 impacts Mattermost in High Availability configurations, leading to the disclosure of sensitive information to users with connected Websocket clients. The vulnerability was discovered by Kyriakos Ziakoulis and Harrison Healey.
Understanding CVE-2023-1775
This CVE involves the failure of Mattermost to sanitize certain events broadcast to all users in a High Availability setup, resulting in the exposure of sensitive information.
What is CVE-2023-1775?
When running in a High Availability configuration, Mattermost fails to properly sanitize some of the user_updated and post_deleted events broadcast to all users, potentially exposing sensitive data to users with currently connected Websocket clients.
The Impact of CVE-2023-1775
The impact of this vulnerability is rated as medium severity with a CVSS base score of 4.3. It can lead to the disclosure of sensitive information to unauthorized actors.
Technical Details of CVE-2023-1775
This section delves into the specifics of the vulnerability.
Vulnerability Description
The issue arises from Mattermost's failure to sanitize certain events, leading to the disclosure of sensitive information to users in a High Availability environment.
Affected Systems and Versions
Versions of Mattermost up to 7.7.1 and 7.1.5 are affected by this vulnerability when configured in a High Availability setup.
Exploitation Mechanism
The vulnerability allows attackers to potentially intercept and access sensitive information due to improper sanitization of broadcasted events.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.
Immediate Steps to Take
Update Mattermost to version 7.8.0, 7.1.6, 7.7.2, or higher to mitigate the risk of sensitive information disclosure.
Long-Term Security Practices
Regularly monitor and update your Mattermost instances to ensure all security patches are applied promptly.
Patching and Updates
Regularly check for security updates and apply patches provided by Mattermost promptly to protect your systems from known vulnerabilities.