Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| poljar / matrix-nio | affected < 0.20 |
CWE
CWE-322, CWE-287
References
- https://github.com/poljar/matrix-nio/security/advisories/GHSA-w4pr-4vjg-hffh
- https://github.com/poljar/matrix-nio/commit/b1cbf234a831daa160673defd596e6450e9c29f0
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.