Bugzilla – Bug 1223319
VUL-0: CVE-2024-31208: matrix-synapse: weakness in auth chain indexing allows DoS
Last modified: 2024-04-24 11:03:44 UTC
Weakness in auth chain indexing allows DoS from remote room members through disk fill and high CPU usage Description Impact 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 how the auth chain cover index is calculated. 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. Patches Server administrators should upgrade to 1.105.1 or later. Workarounds 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 For more information If you have any questions or comments about this advisory, please email us at security AT element.io. References: https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v https://github.com/element-hq/synapse/releases/tag/v1.105.1
This is an autogenerated message for OBS integration: This bug (1223319) was mentioned in https://build.opensuse.org/request/show/1169911 Factory / matrix-synapse
https://build.opensuse.org/request/show/1169911 Open review for openSUSE:Factory:Staging:adi:89