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    CVE-2021-46879

    An issue was discovered in Treasure Data Fluent Bit 1.7.1, a wrong variable is used to get the msgpack data resulting in a heap overflow in flb_msgpack_gelf_value_ext. An attacker can craft a malicious file and tick the victim to open the file with the software, triggering a heap overflow and execute arbitrary code on the target system.

    Published:Apr 11, 2023
    Last Modified:Feb 11, 2025
    EPS:Apr 11, 2023
    EPSS Score:0.00022
    CVSS Score:7.8

    Affected Products

    Vendor
    Treasuredata
    Product
    Fluent Bit

    Exploits

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26851

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    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