NATS Server: MQTT-over-WebSocket Path Can Crash WebSocket-Only JetStream Servers Before MQTT Is Enabled
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.3%
exploitation probability
0.3%top 74% of all CVEs
observed exploitation
nono source reports it
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, a WebSocket listener could route requests for the MQTT-over-WebSocket path into MQTT handling even when MQTT was not configured, allowing an unauthenticated client with access to the WebSocket listener to reach uninitialized MQTT state and crash the server process. This issue is fixed in versions 2.14.3 and 2.12.12.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Affected products
nats-io · nats-serverReferences
https://github.com/nats-io/nats-server/commit/73b3dd9a5ea0fa7bf08b702338676355b29b5fb4https://github.com/nats-io/nats-server/commit/837536b98b3a9280b993282155ff2bdd3ca38c30https://github.com/nats-io/nats-server/releases/tag/v2.12.12https://github.com/nats-io/nats-server/releases/tag/v2.14.3https://github.com/nats-io/nats-server/security/advisories/GHSA-p957-7v2w-g93g