CVE-2017-7653

Publication date 5 June 2018

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The Eclipse Mosquitto broker up to version 1.4.15 does not reject strings that are not valid UTF-8. A malicious client could cause other clients that do reject invalid UTF-8 strings to disconnect themselves from the broker by sending a topic string which is not valid UTF-8, and so cause a denial of service for the clients.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mosquitto	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Fixed 1.4.15-2ubuntu0.18.10.3
	18.04 LTS bionic	Fixed 1.4.15-2ubuntu0.18.04.3
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 1.4.8-1ubuntu0.16.04.7
	14.04 LTS trusty	Vulnerable

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-4023-1
Mosquitto vulnerabilities
20 June 2019