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
- 2025-10-21T04:28:14.790129Z
- 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