8.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
0.001 Low
EPSS
Percentile
19.6%
When matrix-nio before 0.20 requests a room key from our devices, it correctly accepts key forwards only if they are a response to a previous request. However, it doesn’t check that the device that responded matches the device the key was requested from.
This allows a malicious homeserver to insert room keys of questionable validity into the key store in some situations, potentially assisting in an impersonation attack.
If you have any questions or comments about this advisory, e-mail us at [email protected].
CPE | Name | Operator | Version |
---|---|---|---|
matrix-nio | eq | 0.10.0 | |
matrix-nio | eq | 0.15.0 | |
matrix-nio | eq | 0.16.0 | |
matrix-nio | eq | 0.18.2 | |
matrix-nio | eq | 0.18.6 | |
matrix-nio | eq | 0.7.1 | |
matrix-nio | eq | 0.18.5 | |
matrix-nio | eq | 0.15.1 | |
matrix-nio | eq | 0.4.1 | |
matrix-nio | eq | 0.9.0 |