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    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.

    Published:Mar 13, 2019
    Last Modified:Nov 21, 2024
    EPS:Mar 13, 2019
    EPSS Score:0.01009
    CVSS Score:7.5

    Affected Products

    Vendor
    Treasuredata
    Product
    Fluent Bit

    Exploits

    https://github.com/fluent/fluent-bit/issues/1135https://github.com/fluent/fluent-bit/issues/1135

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High