Description
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.
Published: 2023-09-01
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-5511-1 mosquitto security update
EUVD EUVD EUVD-2023-32063 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.
Ubuntu USN Ubuntu USN USN-6492-1 Mosquitto vulnerabilities
History

Thu, 26 Jun 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Eclipse Mosquitto
Redhat Satellite Satellite Capsule
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-06-26T13:59:02.058Z

Reserved: 2023-03-15T00:00:00.000Z

Link: CVE-2023-28366

cve-icon Vulnrichment

Updated: 2024-08-02T12:38:25.296Z

cve-icon NVD

Status : Modified

Published: 2023-09-01T16:15:07.790

Modified: 2025-06-26T14:15:28.433

Link: CVE-2023-28366

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-09-01T00:00:00Z

Links: CVE-2023-28366 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses