Improper Authentication Affecting mosquitto package, versions <1.5.6-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-MOSQUITTO-1553998
- published9 Feb 2019
- disclosed27 Mar 2019
Introduced: 9 Feb 2019
CVE-2018-12551 (opens in a new tab)How to fix?
Upgrade Debian:12 mosquitto to version 1.5.6-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mosquitto package and not the mosquitto package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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
- https://security-tracker.debian.org/tracker/CVE-2018-12551
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=543401
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12551
- https://lists.debian.org/debian-lts-announce/2019/10/msg00035.html
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-12551