Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, PostOffice.publishWill publishes a client's Last-Will message without applying the canWrite authorization and reserved-topic checks used for a normal PUBLISH. A client can configure a Will for a topic that the client is not permitted to write and cause the broker to publish the unauthorized message when the client disconnects unexpectedly.
This issue allows unauthorized message injection into restricted topics. This issue is fixed in version 0.18.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Moquette Moquette
cpe:2.3:a:moquette:moquette:*:*:*:*:*:*:*:*
|
— |
0.18.1
|
References 3
https://github.com/moquette-io/moquette/commit/f5a323fe782d1505c0097498cb22eb6e…
security-advisories@github.com
https://github.com/moquette-io/moquette/releases/tag/v0.18.1
security-advisories@github.com
https://github.com/moquette-io/moquette/security/advisories/GHSA-5f42-97gr-vfhq
security-advisories@github.com