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CVE-2023-28366

Published: 1 September 2023

The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.

Notes

AuthorNote
gianz
Memory leak requiring refactoring of core functions to be fixed.
Applying the patches to versions < 2.0.0 is likely to cause regressions.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
mosquitto
Launchpad, Ubuntu, Debian
bionic Ignored
(backporting risks regressions)
mantic Not vulnerable
(2.0.18-1)
trusty Not vulnerable
(code-not-present)
upstream
Released (2.0.16)
xenial Ignored
(backporting risks regressions)
focal
Released (1.6.9-1ubuntu0.1~esm1)
Available with Ubuntu Pro
jammy
Released (2.0.11-1ubuntu1.1)
lunar
Released (2.0.11-1.2ubuntu0.1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H