Eclipse Mosquitto up to 2.0.15 QoS 2 Message memory leak

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Eclipse Mosquitto up to 2.0.15. This impacts an unknown function of the component QoS 2 Message Handler. Executing a manipulation can lead to memory leak. This vulnerability appears as CVE-2023-28366. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Eclipse Mosquitto up to 2.0.15. It has been declared as problematic. This vulnerability affects an unknown function of the component QoS 2 Message Handler. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was presented 09/01/2023 as CSNC-2023-001. The advisory is shared for download at compass-security.com. This vulnerability was named CVE-2023-28366 since 03/15/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.0.16 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 6113eac95a9df634fbc858be542c4a0456bfe7b9 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-32063). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mosquitto 2.0.16
Patch: 6113eac95a9df634fbc858be542c4a0456bfe7b9

Timelineinfo

03/15/2023 🔍
09/01/2023 +169 days 🔍
09/01/2023 +0 days 🔍
06/27/2025 +665 days 🔍

Sourcesinfo

Product: github.com

Advisory: CSNC-2023-001
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-28366 (🔍)
GCVE (CVE): GCVE-0-2023-28366
GCVE (VulDB): GCVE-100-238588
EUVD: 🔍

Entryinfo

Created: 09/01/2023 21:30
Updated: 06/27/2025 05:02
Changes: 09/01/2023 21:30 (45), 09/29/2023 14:32 (11), 06/26/2025 16:21 (16), 06/27/2025 05:02 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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