CVE-2018-12550

Publication date 27 March 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mosquitto	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 1.4.15-2ubuntu0.18.10.1
	18.04 LTS bionic	Fixed 1.4.15-2ubuntu0.18.04.1
	16.04 LTS xenial	Fixed 1.4.8-1ubuntu0.16.04.5
	14.04 LTS trusty	Vulnerable

Notes

ebarretto

mosquitto's version on Trusty is EOL.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
mosquitto	Upstream: https://mosquitto.org/files/cve/2018-12550/

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H