CVE-2019-9749

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.

CVSS v3 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/fluent/fluent-bit/issues/1135	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:treasuredata:fluent_bit:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2019-03-13 19:29

Updated : 2023-12-10 12:59

NVD link : CVE-2019-9749

Mitre link : CVE-2019-9749

CVE.ORG link : CVE-2019-9749

JSON object : View

Products Affected

treasuredata

fluent_bit

CWE

CWE-681

Incorrect Conversion between Numeric Types

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