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.
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Affected Vendors & Products
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History
Wed, 23 Apr 2025 17:15:00 +0000
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2022-09-29T14:35:10.000Z
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

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