CVE-2024-31208

CVSS V2 None CVSS V3 None

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.

Overview

CVE ID
CVE-2024-31208

Assigner
GitHub_M

Vulnerability Status
PUBLISHED

Published Version
2024-04-23T17:26:39.171Z

Last Modified Date
2024-04-23T17:26:39.171Z

Weakness Enumerations

CWE	URL
CWE-770	http://cwe.mitre.org/data/definitions/770.html

References

Reference URL	Reference Tags
https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v	x_refsource_CONFIRM
https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a	x_refsource_MISC
https://github.com/element-hq/synapse/releases/tag/v1.105.1	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3K/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DET/

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2024-31208
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-31208

History

Created	Old Value	New Value	Data Type	Notes
2024-06-25 22:33:03				Added to TrackCVE