CVE-2018-12551

Description

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.

Risk Information

Base Score

8.1

MODERATE

Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score

Exploitation Probability

0.708

Associated Vulnerability

Vulnerability	OS Platform
Vulnerability CVE-2018-12546,CVE-2018-12550,CVE-2018-12551 are affected in Mosquitto 1.5.5	Windows
mosquitto security update(DSA-4388-1) mosquitto_1.4.10-3+deb9u3_i386.deb	Linux
mosquitto security update(DSA-4388-1) mosquitto_1.4.10-3+deb9u3_amd64.deb	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234