CVE-2019-11842 : Vulnerability Insights and Analysis

A vulnerability in Matrix Sydent and Synapse versions prior to 1.0.3 and 0.99.3.1 respectively allows attackers to predict authentication tokens and random IDs.

Understanding CVE-2019-11842

This CVE involves mishandling of random number generation, leading to increased predictability of Sydent authentication tokens and Synapse random IDs.

What is CVE-2019-11842?

This vulnerability affects Matrix Sydent versions before 1.0.3 and Synapse versions before 0.99.3.1, making it easier for attackers to predict authentication tokens and random IDs.

The Impact of CVE-2019-11842

The mishandling of random number generation increases the susceptibility to attackers being able to predict a Sydent authentication token or a Synapse random ID.

Technical Details of CVE-2019-11842

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from the mishandling of random number generation in Matrix Sydent and Synapse versions.

Affected Systems and Versions

Matrix Sydent versions prior to 1.0.3
Synapse versions prior to 0.99.3.1

Exploitation Mechanism

Attackers can exploit this vulnerability to predict Sydent authentication tokens and Synapse random IDs.

Mitigation and Prevention

Protect your systems from this vulnerability with the following steps:

Immediate Steps to Take

Update Matrix Sydent to version 1.0.3 or newer.
Update Synapse to version 0.99.3.1 or newer.
Monitor for any unauthorized access or unusual activities.

Long-Term Security Practices

Regularly review and update random number generation mechanisms.
Implement multi-factor authentication to enhance security.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.