Matrix Homeserver Vulnerability: High CPU Consumption and Data Exhaustion

CVE-2024-31208

What is CVE-2024-31208?

The Synapse Open-Source Matrix homeserver is susceptible to exploitation by a remote Matrix user sharing a room with instances running versions before 1.105.1. An attacker can send specially crafted events to take advantage of a flaw in the V2 state resolution algorithm. This exploitation can lead to increased CPU usage and cause excessive data to accumulate in the database, resulting in potential service disruption. Systems that do not engage in federated interactions are not impacted. Server administrators are encouraged to upgrade to version 1.105.1 or newer to mitigate this vulnerability. Additionally, administrators can implement workarounds by banning malicious users, applying access controls, or utilizing the admin API to purge affected rooms.

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Meterian

CVE-2024-31208

Meterian: Daily Vulnerabilities

Critical High Medium matrix-synapse CVE-2024-31208Synapse is an open-source Matrix...

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