| Name | CVE-2021-41039 |
| Description | In 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1001028 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mosquitto (PTS) | bullseye | 2.0.11-1+deb11u1 | fixed |
| bullseye (security) | 2.0.11-1+deb11u2 | fixed |
| bookworm, bookworm (security) | 2.0.11-1.2+deb12u1 | fixed |
| sid, trixie | 2.0.21-1 | fixed |
The information below is based on the following data on fixed versions.
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)