CVE-2018-12550

NameCVE-2018-12550
DescriptionWhen 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1972-1, DSA-4388-1
Debian Bugs921976

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
mosquitto (PTS)bullseye (security), bullseye2.0.11-1+deb11u1fixed
bookworm, bookworm (security)2.0.11-1.2+deb12u1fixed
sid, trixie2.0.20-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
mosquittosourcejessie1.3.4-2+deb8u4DLA-1972-1
mosquittosourcestretch1.4.10-3+deb9u3DSA-4388-1
mosquittosource(unstable)1.5.6-1921976

Notes

https://mosquitto.org/blog/2019/02/version-1-5-6-released/
https://mosquitto.org/files/cve/2018-12550
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