CVE-2021-41039

NameCVE-2021-41039
DescriptionIn versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1001028

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
mosquittosourcestretch(not affected)
mosquittosourcebuster(not affected)
mosquittosourcebullseye2.0.11-1+deb11u1
mosquittosource(unstable)2.0.11-1.21001028

Notes

[buster] - mosquitto <not-affected> (Vulnerable code introduced later)
[stretch] - mosquitto <not-affected> (Vulnerable code introduced later)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314
https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/637
Fixed by: https://github.com/eclipse/mosquitto/commit/9d6a73f9f72005c2f19a262f15d28327eedea91f (v2.0.12)

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