| 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, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium |
| Debian Bugs | 1001028 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| mosquitto (PTS) | stretch | 1.4.10-3+deb9u4 | fixed |
| stretch (security) | 1.4.10-3+deb9u5 | fixed | |
| buster, buster (security) | 1.5.7-1+deb10u1 | fixed | |
| bookworm, bullseye, sid | 2.0.11-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| mosquitto | source | stretch | (not affected) | |||
| mosquitto | source | buster | (not affected) | |||
| mosquitto | source | (unstable) | (unfixed) | 1001028 |
[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
Fixed by: https://github.com/eclipse/mosquitto/commit/9d6a73f9f72005c2f19a262f15d28327eedea91f (v2.0.12)