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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Matrix |
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Advisories
| Source | ID | Title |
|---|---|---|
 EUVD |
EUVD-2023-0139 | 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. |
 Github GHSA |
GHSA-f3wc-3vxv-xmvr | Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 13 Feb 2025 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | 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. |
Tue, 14 Jan 2025 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-02-13T16:50:32.310Z
Reserved: 2023-05-08T13:26:03.880Z
Link: CVE-2023-32323
Vulnrichment
Updated: 2024-08-02T15:10:24.899Z
NVD
Status : Modified
Published: 2023-05-26T14:15:10.827
Modified: 2025-02-13T17:16:30.267
Link: CVE-2023-32323
Redhat
No data.
OpenCVE Enrichment
No data.