CVE-2018-12551

Source
https://nvd.nist.gov/vuln/detail/CVE-2018-12551
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12551.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-12551
Downstream
Related
Published
2019-03-27T18:29:00Z
Modified
2025-10-14T16:22:53.343610Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/eclipse/mosquitto

Affected ranges

Type
GIT
Repo
https://github.com/eclipse/mosquitto
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected

Affected versions

v1.*

v1.4
v1.4.1
v1.4.10
v1.4.11
v1.4.12
v1.4.13
v1.4.14
v1.4.15
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4.8
v1.4.9
v1.5
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5