matrix-nio is a Python Matrix client library, designed according to sans I/O principles. Prior to version 0.20, when a users requests a room key from their devices, the software correctly remember the request. Once they receive a forwarded room key, they accept it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.20 fixes the issue.
Metrics
Affected Vendors & Products
Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-6957 | matrix-nio is a Python Matrix client library, designed according to sans I/O principles. Prior to version 0.20, when a users requests a room key from their devices, the software correctly remember the request. Once they receive a forwarded room key, they accept it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.20 fixes the issue. |
Github GHSA |
GHSA-w4pr-4vjg-hffh | When matrix-nio receives forwarded room keys, the receiver doesn't check if it requested the key from the forwarder |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Wed, 23 Apr 2025 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-04-23T16:53:59.840Z
Reserved: 2022-09-02T00:00:00.000Z
Link: CVE-2022-39254
Updated: 2024-08-03T12:00:43.472Z
Status : Modified
Published: 2022-09-29T15:15:10.513
Modified: 2024-11-21T07:17:53.233
Link: CVE-2022-39254
No data.
OpenCVE Enrichment
No data.
EUVD
Github GHSA