mosquitto: memory leak leads to unresponsive broker
Published Oct 2, 2023
7.5
HIGHCVSS 3.1
EPSS 0.71%
Description
In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not CONNECT packets.
Affected products
-
- Version 0StatusaffectedConstraints<2.0.16
- Version
No data.
Red Hat Satellite 6.13 for RHEL 8
mosquitto-0:2.0.17-1.el8sat
Fixed · RHSA-2024:1061
Red Hat Satellite 6.13 for RHEL 8
mosquitto-0:2.0.17-1.el8sat
Fixed · RHSA-2024:1061
Red Hat Satellite 6.14 for RHEL 8
mosquitto-0:2.0.17-1.el8sat
Fixed · RHSA-2024:0797
Red Hat Satellite 6.14 for RHEL 8
mosquitto-0:2.0.17-1.el8sat
Fixed · RHSA-2024:0797
Red Hat Integration Camel K 1
mosquitto
Not affected
Red Hat build of Apache Camel for Spring Boot 3
mosquitto
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Satellite 6.13 for RHEL 8 | mosquitto-0:2.0.17-1.el8sat | Fixed | RHSA-2024:1061 |
| Red Hat Satellite 6.13 for RHEL 8 | mosquitto-0:2.0.17-1.el8sat | Fixed | RHSA-2024:1061 |
| Red Hat Satellite 6.14 for RHEL 8 | mosquitto-0:2.0.17-1.el8sat | Fixed | RHSA-2024:0797 |
| Red Hat Satellite 6.14 for RHEL 8 | mosquitto-0:2.0.17-1.el8sat | Fixed | RHSA-2024:0797 |
| Red Hat Integration Camel K 1 | mosquitto | Not affected | n/a |
| Red Hat build of Apache Camel for Spring Boot 3 | mosquitto | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
2 other sources (CVE.org, Red Hat) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Sep 20, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.71% (0.00709) | 51.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.61% (0.00608) | 44.24th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00032) | 5.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00089) | 39.70th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.04% (0.00044) | 13.16th | v3 (v2023.03.01) |
| Oct 5, 2023 | 0.04% (0.00044) | 11.15th | v3 (v2023.03.01) |
| Oct 3, 2023 | 0.04% (0.00043) | 7.17th | v3 (v2023.03.01) |
References (7)
- https://access.redhat.com/security/cve/CVE-2023-0809 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2236882 Issue Tracking
- https://github.com/eclipse/mosquitto/commit/6113eac95a9df634fbc858be542c4a0456bfe7b9
- https://mosquitto.org/blog/2023/08/version-2-0-16-released/ Release Notes
- https://nvd.nist.gov/vuln/detail/CVE-2023-0809
- https://security.gentoo.org/glsa/202401-09
- https://www.cve.org/CVERecord?id=CVE-2023-0809
Change history (0)
No recorded changes yet.