CVE-2023-32323

Name
CVE-2023-32323
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/matrix-org/synapse/security/advisories/GHSA-f3wc-3vxv-xmvr
MISC https://github.com/matrix-org/synapse/pull/14642
MISC https://github.com/matrix-org/synapse/issues/14492
MISC https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* synapse >= None < 1.74.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status