| Name | CVE-2023-5632 |
| Description | In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6
|
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mosquitto (PTS) | jessie, jessie (lts) | 1.3.4-2+deb8u4 | vulnerable |
| stretch (security), stretch (lts), stretch | 1.4.10-3+deb9u5 | fixed |
| buster, buster (security) | 1.5.7-1+deb10u1 | fixed |
| bullseye (security), bullseye | 2.0.11-1+deb11u1 | fixed |
| bookworm (security), bookworm | 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 | jessie | (unfixed) | end-of-life | | |
| mosquitto | source | stretch | (not affected) | | | |
| mosquitto | source | buster | (not affected) | | | |
| mosquitto | source | (unstable) | 2.0.7-1 | | | |
Notes
[buster] - mosquitto <not-affected> (The vulnerable code was introduced later)
https://github.com/eclipse/mosquitto/pull/2053
https://github.com/eclipse/mosquitto/commit/18bad1ff32435e523d7507e9b2ce0010124a8f2d (v2.0.6)
[stretch] - mosquitto <not-affected> (The vulnerable code was introduced later)