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Vulnerabilities / CVE-2016-9877

critical

CVE-2016-9877

rabbitmq: MQTT connection authentication succeeds with empty password

Published Modified CWE 284
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (high), Red Hat (medium).

Description

An issue was discovered in Pivotal RabbitMQ 3.x before 3.5.8 and 3.6.x before 3.6.6 and RabbitMQ for PCF 1.5.x before 1.5.20, 1.6.x before 1.6.12, and 1.7.x before 1.7.7. MQTT (MQ Telemetry Transport) connection authentication with a username/password pair succeeds if an existing username is provided but the password is omitted from the connection request. Connections that use TLS with a client-provided certificate are not affected.

Affected packages and fixed versions

SourcePackageFixed in
debian 11rabbitmq-server3.6.6-1
debian 12rabbitmq-server3.6.6-1
debian 13rabbitmq-server3.6.6-1
debian 14rabbitmq-server3.6.6-1
debian 8rabbitmq-server3.3.5-1.1+deb8u1
echorabbitmq-server3.6.6-1
Red Hatrabbitmq-serverno fix listed
ubuntu 14.04rabbitmq-server3.2.4-1ubuntu0.1
ubuntu 16.04rabbitmq-server3.5.7-1ubuntu0.16.04.2
ubuntu 16.04-ESMrabbitmq-server3.5.7-1ubuntu0.16.04.2

References

All 9 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.