CVE-2022-39374 — Uncontrolled Resource Consumption in Synapse
Severity
6.5MEDIUMNVD
EPSS
0.2%
top 61.68%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMay 26
Latest updateApr 22
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6
Affected Packages2 packages
Patches
🔴Vulnerability Details
5CVEList▶
Synapse Denial of service due to incorrect application of event authorization rules during state resolution↗2023-05-26
OSV▶
CVE-2022-39374: Synapse is an open-source Matrix homeserver written and maintained by the Matrix↗2023-05-26
GHSA▶
Synapse Denial of service due to incorrect application of event authorization rules during state resolution↗2023-05-24
OSV▶
Synapse Denial of service due to incorrect application of event authorization rules during state resolution↗2023-05-24