Upstream information

CVE-2018-12551 at MITRE


When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 6.8
Vector AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database
Base Score 8.1
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 3
SUSE Bugzilla entry: 1125020 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15
  • libmosquitto1 >= 1.4.15-bp150.3.3.1
  • libmosquittopp1 >= 1.4.15-bp150.3.3.1
  • mosquitto >= 1.4.15-bp150.3.3.1
  • mosquitto-clients >= 1.4.15-bp150.3.3.1
  • mosquitto-devel >= 1.4.15-bp150.3.3.1
openSUSE Leap 15.0
  • libmosquitto1 >= 1.4.15-lp150.2.3.1
  • libmosquittopp1 >= 1.4.15-lp150.2.3.1
  • mosquitto >= 1.4.15-lp150.2.3.1
  • mosquitto-clients >= 1.4.15-lp150.2.3.1
  • mosquitto-devel >= 1.4.15-lp150.2.3.1
openSUSE Tumbleweed
  • libmosquitto1 >= 2.0.11-1.2
  • libmosquittopp1 >= 2.0.11-1.2
  • mosquitto >= 2.0.11-1.2
  • mosquitto-clients >= 2.0.11-1.2
  • mosquitto-devel >= 2.0.11-1.2
openSUSE Tumbleweed GA libmosquitto1-2.0.11-1.2

SUSE Timeline for this CVE

CVE page created: Mon Feb 11 17:03:41 2019
CVE page last modified: Fri Dec 8 17:17:50 2023