matrix-synapse: Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation
CVE-2023-32323 is fixed in matrix-synapse on 1 platform by DEBIAN-CVE-2023-32323 (version 1.74.0-1), released May 26, 2023. It is not reported as exploited. Patch Radar priority: Routine.
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. A malicious user on a Synapse homeserver X with permission to create certain state events can disable outbound federation from X to an arbitrary homeserver Y. Synapse instances with federation disabled are not affected. In versions of Synapse up to and including 1.73, Synapse did not limit the size of `invite_room_state`, meaning that it was possible to create an arbitrarily large invite event. Synapse 1.74 refuses to create oversized `invite_room_state` fields. Server operators should upgrade to Synapse 1.74 or newer urgently.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| matrix-synapse · Debian 14 | 1.74.0-1 | DEBIAN-CVE-2023-32323 | May 26, 2023 |
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