#VU39960 Improper access control in RabbitMQ - CVE-2016-9877

Vulnerability identifier: #VU39960

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9877

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RabbitMQ
Client/Desktop applications / Messaging software

Vendor: VMware, Inc

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

RabbitMQ: 1.5.0 - 3.6.5

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External links
https://www.debian.org/security/2017/dsa-3761
https://www.securityfocus.com/bid/95065
https://pivotal.io/security/cve-2016-9877
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03880en_us

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.