CVE-2022-39374

Name	CVE-2022-39374
Description	Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
matrix-synapse (PTS)	trixie	1.100.0-1	fixed
	sid	1.103.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
matrix-synapse	source	(unstable)	1.68.0-1

Notes

https://matrix.org/blog/2023/05/24/disclosing-synapse-security-advisories/
https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
https://bugzilla.redhat.com/show_bug.cgi?id=2209956