Authentication mechanism absence or evasion In github.com/nats-io/nats-server/v2
Description
NATS allows MQTT clients to bypass ACL checks
Background
NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing.
The nats-server provides an MQTT client interface.
Problem Description
When using ACLs on message subjects, these ACLs were not applied in the $MQTT.> namespace, allowing MQTT clients to bypass ACL checks for MQTT subjects.
Affected Versions
Any version before v2.12.6 or v2.11.15
Workarounds
None.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Package | Affected version | Patched versions |
|---|---|---|---|
 go | github.com/nats-io/nats-server/v2 | 2.11.15, 2.12.6 |
Aliases