CVE-2017-7650

Publication date 11 September 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mosquitto	17.04 zesty	Fixed 1.4.10-2ubuntu0.1
	16.10 yakkety	Fixed 1.4.8-1ubuntu0.16.10.1
	16.04 LTS xenial	Fixed 1.4.8-1ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 0.15-2ubuntu1.1

How can I get the fixes?
What do statuses mean?

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

MITRE
NVD
Launchpad
Debian

Other references

http://mosquitto.org/2017/05/security-advisory-cve-2017-7650/
https://www.cve.org/CVERecord?id=CVE-2017-7650