When NGINX Plus is configured to use the Message Queuing Telemetry Transport (MQTT) filter module…
Summary
When NGINX Plus is configured to use the Message Queuing Telemetry Transport (MQTT) filter module (ngx_stream_mqtt_filter_module), unauthenticated attackers can send requests with conditions beyond the attacker's control to cause a heap buffer over-read in the NGINX worker process, leading to a restart. Impact: This vulnerability may allow remote unauthenticated attackers to have limited control to restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
What this means
In plain English
When NGINX Plus is configured to use the Message Queuing Telemetry Transport (MQTT) filter module (ngx_stream_mqtt_filter_module), unauthenticated attackers can send requests with conditions beyond the attacker's control to cause a heap buffer over-read in the NGINX worker process, leading to a restart. Impact: This vulnerability may allow remote unauthenticated attackers to have limited control to restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. The official description indicates that exploitation does not require prior authentication.
Recommended action
Primary action: update to a vendor-listed fixed release: 37.0.3.1, R36 P7.
Rewritten locally from the scraped official advisory data above; no generative API is used. The vendor advisory is authoritative.
- NGINX Plus 37.0.0.1 before 37.0.3.1
- NGINX Plus R36 before R36 P7
- NGINX Plus R33
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 37.0.3.1
- R36 P7
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 37.0.3.1, R36 P7. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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