CVE-2024-31208

6.5 · MEDIUM

Published Apr 23, 2024 matrix CWE-770 EPSS 1.46% (72th pctl) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-31208 is a medium-severity vulnerability affecting matrix synapse. It was published on April 23, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical Description

Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.

Remediation

Check the references section for vendor advisories and patches from matrix. Update synapse to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
matrix	synapse	>= 0, < 1.105.1	Affected

References

GitHub github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a GitHub github.com/element-hq/synapse/releases/tag/v1.105.1 GitHub github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v Ref lists.fedoraproject.org/archives/list/[email protected]/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB/ Ref lists.fedoraproject.org/archives/list/[email protected]/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3K/ Ref lists.fedoraproject.org/archives/list/[email protected]/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DET/ GitHub github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a GitHub github.com/element-hq/synapse/releases/tag/v1.105.1 GitHub github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v Ref lists.fedoraproject.org/archives/list/[email protected]/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB/

Frequently Asked Questions

What is CVE-2024-31208?

CVE-2024-31208 is a medium-severity vulnerability affecting matrix synapse. It was published on April 23, 2024 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2024-31208?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-31208?

How can CyberStrike help with CVE-2024-31208?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-31208 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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