Vulnerability Details : CVE-2018-12551
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.
Vulnerability category: BypassGain privilege
Products affected by CVE-2018-12551
- cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-12551
0.25%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 62 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-12551
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST |
CWE ids for CVE-2018-12551
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Primary)
-
The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.Assigned by: emo@eclipse.org (Secondary)
References for CVE-2018-12551
-
https://bugs.eclipse.org/bugs/show_bug.cgi?id=543401
543401 – (CVE-2018-12551) Blank username allows Mosquitto Security BypassExploit;Issue Tracking;Vendor Advisory
-
https://lists.debian.org/debian-lts-announce/2019/10/msg00035.html
[SECURITY] [DLA 1972-1] mosquitto security update
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