An issue was discovered in the MQTT input plugin in Fluent Bit through 1.0.4
Published Mar 13, 2019
7.5
HIGHCVSS 3.1
EPSS 1.66%
Description
An issue was discovered in the MQTT input plugin in Fluent Bit through 1.0.4. When this plugin acts as an MQTT broker (server), it mishandles incoming network messages. After processing a crafted packet, the plugin's mqtt_packet_drop function (in /plugins/in_mqtt/mqtt_prot.c) executes the memmove() function with a negative size parameter. That leads to a crash of the whole Fluent Bit server via a SIGSEGV signal.
Affected products
No data.
- ≤ 1.0.4
No data.
No Red Hat product state for this CVE.
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:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.66% (0.01657) | 75.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.66% (0.01657) | 73.49th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.09% (0.00086) | 37.17th | v3 (v2023.03.01) |
| Apr 26, 2024 | 0.09% (0.00086) | 35.88th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.08% (0.00083) | 33.87th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.07% (0.00075) | 30.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00115) | 43.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.84% (0.01840) | 47.83th | v5 (v2026.06.15) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Sep 1, 2021 | 0.42% (0.00416) | 25.53th | v1 |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://github.com/fluent/fluent-bit/issues/1135 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/fluent/fluent-bit/issues/1135 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.