CVE-2023-28366
HIGH
7.5
CVSS Score
Published: September 1, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:47 AM UTC
1 product affected across 1 vendorMosquitto
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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/eclipse/mosquitto/commit/6113eac95a9df634fbc858be542c4a0456bfe7b9
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJ2FMBGVVQEQWTTQB7YLKTAHMX2UM66X/
- https://security.gentoo.org/glsa/202401-09
- https://www.debian.org/security/2023/dsa-5511
References (7)
Release Notes
Source: [email protected]
https://github.com/eclipse/mosquitto/compare/v2.0.15...v2.0.16SSVC — Action Prioritization
SSVCNo known exploitAutomatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.5HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-401
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