| Name | CVE-2021-28166 |
| Description | In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur. |
| 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 | 986701 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mosquitto (PTS) | buster, buster (security) | 1.5.7-1+deb10u1 | fixed |
| bullseye (security), bullseye | 2.0.11-1+deb11u1 | fixed |
| bookworm, bookworm (security) | 2.0.11-1.2+deb12u1 | fixed |
| sid, trixie | 2.0.18-1 | fixed |
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) | 2.0.10-1 | | | 986701 |
Notes
[bullseye] - mosquitto <no-dsa> (Minor issue)
[buster] - mosquitto <not-affected> (Vulnerable code introduced in 2.0)
[stretch] - mosquitto <not-affected> (Vulnerable code introduced in 2.0)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=572608