CVE-2022-0903 : Security Advisory and Response

A critical vulnerability, CVE-2022-0903, affects Mattermost servers with versions up to and including 6.3.2. It allows attackers to crash the server through a call stack overflow bug in the SAML login feature. Learn more about the impact, technical details, and mitigation steps below.

Understanding CVE-2022-20657

This section provides insights into the vulnerability found in Mattermost servers.

What is CVE-2022-20657?

The CVE-2022-20657 vulnerability involves a call stack overflow bug in the SAML login feature in Mattermost servers, allowing attackers to crash the server by submitting a maliciously crafted POST body.

The Impact of CVE-2022-20657

The impact of this vulnerability is rated as MEDIUM severity, with a CVSS base score of 5.3. It has a low confidentiality impact, no integrity impact, and requires no special privileges to exploit.

Technical Details of CVE-2022-20657

Explore the technical aspects of the CVE-2022-20657 vulnerability.

Vulnerability Description

The vulnerability arises from a call stack overflow in the SAML login feature of Mattermost servers.

Affected Systems and Versions

Mattermost versions up to and including 6.3.2 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by submitting a specially crafted POST body to the server, causing a crash.

Mitigation and Prevention

Discover the necessary steps to mitigate the CVE-2022-20657 vulnerability.

Immediate Steps to Take

Users are advised to update their Mattermost server to versions 6.3.3, 6.2.3, 6.1.3, or 5.37.8 immediately.

Long-Term Security Practices

Implement ongoing security measures such as regular software updates and security scans to prevent similar vulnerabilities.

Patching and Updates

Regularly check for security updates from Mattermost and apply patches promptly to ensure your server's security.