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CVE-2022-41952 : Vulnerability Insights and Analysis

Discover how CVE-2022-41952 impacts Matrix Synapse versions before 1.53.0, leading to uncontrolled resource consumption. Learn about the vulnerability, its impact, and mitigation steps.

A security vulnerability has been identified in Matrix Synapse versions prior to 1.53.0 that could lead to uncontrolled resource consumption. Find out more about CVE-2022-41952 and how to mitigate the risks.

Understanding CVE-2022-41952

This section provides an overview of the CVE-2022-41952 vulnerability.

What is CVE-2022-41952?

Matrix Synapse before version 1.52.0, with URL preview functionality enabled, may attempt to generate URL previews for media stream URLs without properly limiting connection time. This can result in long-lived connections to streaming media servers, leading to excessive traffic and connections.

The Impact of CVE-2022-41952

The vulnerability can cause uncontrolled resource consumption, potentially impacting server availability and leading to excessive traffic towards streaming media servers.

Technical Details of CVE-2022-41952

In this section, we delve into the technical aspects of CVE-2022-41952.

Vulnerability Description

Matrix Synapse versions prior to 1.53.0 do not properly limit connection time when generating URL previews for media stream URLs, potentially causing long-lived connections.

Affected Systems and Versions

Vendor: matrix-org Product: synapse Affected Version: < 1.53.0

Exploitation Mechanism

The exploitation of this vulnerability can result in excessive traffic and connections towards streaming media servers.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2022-41952.

Immediate Steps to Take

Upgrade to version 1.53.0, which implements a timeout mechanism to terminate URL preview connections after 30 seconds. Alternatively, disable URL preview functionality by setting

url_preview_enabled: false
in the Synapse configuration file.

Long-Term Security Practices

Regularly update the Matrix Synapse software to the latest version to ensure you are protected against known vulnerabilities.

Patching and Updates

Refer to the following links for more information and to access the necessary patches:

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