| Name | CVE-2022-39254 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| python-matrix-nio (PTS) | bookworm | 0.20.1-3 | fixed |
| trixie, sid | 0.24.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| python-matrix-nio | source | (unstable) | 0.20.0-1 |
https://github.com/poljar/matrix-nio/security/advisories/GHSA-w4pr-4vjg-hffh
https://github.com/poljar/matrix-nio/commit/b1cbf234a831daa160673defd596e6450e9c29f0 (0.20.0)