CVE-2022-39254
Published: 29 September 2022
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
python-matrix-nio Launchpad, Ubuntu, Debian |
kinetic |
Ignored
(end of life, was needs-triage)
|
| xenial |
Ignored
(end of standard support)
|
|
| bionic |
Does not exist
|
|
| focal |
Does not exist
|
|
| jammy |
Needs triage
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Needs triage
|
|
| lunar |
Needs triage
|
|
| mantic |
Needs triage
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |