CVE-2022-39254

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/poljar/matrix-nio/commit/b1cbf234a831daa160673defd596e6450e9c29f0	Patch Third Party Advisory
https://github.com/poljar/matrix-nio/security/advisories/GHSA-w4pr-4vjg-hffh	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:matrix-nio_project:matrix-nio:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-09-29 15:15

Updated : 2023-07-13 17:24

NVD link : CVE-2022-39254

Mitre link : CVE-2022-39254

CVE.ORG link : CVE-2022-39254

JSON object : View

Products Affected

matrix-nio_project

matrix-nio

CWE

NVD-CWE-Other CWE-287

Improper Authentication

CWE-322

Key Exchange without Entity Authentication

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