CVE-2022-39254

Source

https://nvd.nist.gov/vuln/detail/CVE-2022-39254

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-39254.json

Aliases

• GHSA-w4pr-4vjg-hffh

Published

2022-09-29T15:15:10Z

Modified

2023-11-29T09:49:33.930968Z

Details

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.

References

• https://github.com/poljar/matrix-nio/security/advisories/GHSA-w4pr-4vjg-hffh
• https://github.com/poljar/matrix-nio/commit/b1cbf234a831daa160673defd596e6450e9c29f0