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    CVE-2021-42389

    Divide-by-zero in Clickhouse's Delta compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.

    Published:Mar 14, 2022
    Last Modified:Jun 25, 2025
    EPS:Mar 14, 2022
    EPSS Score:0.00439
    CVSS Score:6.5

    Affected Products

    Vendor
    Clickhouse
    Product
    Clickhouse

    Exploits

    https://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbmshttps://jfrog.com/blog/7-rce-and-dos-vulnerabilities-found-in-clickhouse-dbms

    Common Weakness Enumeration

    CWE-369 Divide By Zero

    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