CVE-2022-39374
Medium
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
SeverityMedium
CVSS6.5
Exploit probability—
ProductMatrix Synapse
PublishedMay 26, 2023
First seenMay 26, 2023
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- matrix synapse1.68.0 or later
- matrix-synapse1.68.0rc1, 1.68.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| matrix synapse | 1.62.0 ≤ v < 1.68.0 | 1.68.0 |
| matrix-synapsePyPI | 1.62.0 ≤ v < 1.68.0rc1, 1.62.0 ≤ v < 1.68.0 | 1.68.0rc1, 1.68.0 |
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