Security Advisory

CVE-2023-43796

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2023-10-31 16:52:48

Last updated 2025-02-13 17:13:30

Assigner GitHub_M

State PUBLISHED

Description

Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.

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