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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2019-19112 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.
Fixes

Solution

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Workaround

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History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-09-16T22:29:41.796Z

Reserved: 2019-03-13T00:00:00.000Z

Link: CVE-2019-9749

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2019-03-13T19:29:00.297

Modified: 2024-11-21T04:52:13.973

Link: CVE-2019-9749

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses