CVE-2022-39236 Explained : Impact and Mitigation

Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. A vulnerability in versions >= 17.1.0-rc.1 and < 19.7.0 can lead to improper beacon events causing availability issues.

Understanding CVE-2022-39236

This CVE involves improperly formed beacon events in Matrix Javascript SDK that can disrupt the SDK's functionality, impacting data processing.

What is CVE-2022-39236?

Starting from version 17.1.0-rc.1, the matrix-js-sdk can malfunction due to improperly formed beacon events, potentially affecting data processing.

The Impact of CVE-2022-39236

The vulnerability can cause availability issues, leading to the exclusion or corruption of runtime data, affecting consumer data processing.

Technical Details of CVE-2022-39236

Vulnerability Description

Improperly formed beacon events in versions >= 17.1.0-rc.1 and < 19.7.0 of matrix-js-sdk can disrupt its functioning.

Affected Systems and Versions

Affected Vendor: matrix-org
Affected Product: matrix-js-sdk
Affected Versions: >= 17.1.0-rc.1, < 19.7.0

Exploitation Mechanism

The vulnerability is due to improperly structured beacon events that impact the matrix-js-sdk's ability to process and present data.

Mitigation and Prevention

Immediate Steps to Take

To mitigate the issue, update to matrix-js-sdk v19.7.0 or later. Redacting applicable events, waiting for sync processor to store data, and client restart are temporary workarounds.

Long-Term Security Practices

Regularly update software, monitor for security advisories, and follow best coding practices to prevent similar issues.

Patching and Updates

Ensure timely application of patches and updates to mitigate vulnerabilities and maintain security.