Description
When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty, or contains only comments or blank lines, then Mosquitto will treat this as though no ACL file has been defined and use a default allow policy. The new behaviour is to have an empty ACL file mean that all access is denied, which is not a useful configuration but is not unexpected.
References (2)
Core 2
Core References
Issue Tracking, Vendor Advisory x_refsource_confirm
https://bugs.eclipse.org/bugs/show_bug.cgi?id=541870
Mailing List mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/10/msg00035.html
Scores
CVSS v3
8.1
EPSS
0.0047
EPSS Percentile
64.8%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-440
Status
published
Products (1)
eclipse/mosquitto
1.0 - 1.5.5
Published
Mar 27, 2019
Tracked Since
Feb 18, 2026