CVE-2023-32323: Synapse Outgoing federation to specific hosts can be disabled by sending malicious invites
(updated )
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.
References
- github.com/advisories/GHSA-f3wc-3vxv-xmvr
- github.com/matrix-org/synapse
- github.com/matrix-org/synapse/issues/14492
- github.com/matrix-org/synapse/pull/14642
- github.com/matrix-org/synapse/security/advisories/GHSA-f3wc-3vxv-xmvr
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-67.yaml
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD
- nvd.nist.gov/vuln/detail/CVE-2023-32323
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