Moquette is a lightweight Java MQTT broker. Prior to 0.18.1, SessionEventLoop.run catches only InterruptedException, and SessionEventLoopGroup does not restart a terminated loop. An MQTT command that raises an uncaught exception can terminate an event loop shared by multiple client sessions, preventing every co-located client from processing PUBLISH, SUBSCRIBE, PUBACK, and other commands.
An attacker can select client IDs that map across the available loops to disrupt session processing for the entire broker. 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
None
No data modification
Availability
High
Complete denial of service
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 4
https://github.com/moquette-io/moquette/commit/86feb7c31e6fac849c465d8079d08c0e…
security-advisories@github.com
https://github.com/moquette-io/moquette/pull/957
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