CVE-2021-42389

    Dashboard / Vulnerabilities / CVE-2021-42389

    CVE-2021-42389

    Published: 14 Mar 2022Last Modified: 24 Oct 2026

    Summary:

    Details: 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.

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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -5adad0ff121319c172eae302bcef8b67b305557f

    Affected versions

    v21.10.1.8009-testing
    v21.10.1.8013-testing
    v21.10.1.8013-prestable
    v21.10.1.8002-testing
    v21.10.1.7998-testing
    v21.10.1.7939-testing
    v21.10.1.7933-testing
    v21.10.1.7926-testing
    v21.10.1.7892-testing
    v21.10.1.7906-testing
    v21.10.1.7859-testing
    v21.10.1.7856-testing
    v21.10.1.7829-testing
    v21.10.1.7848-testing
    v21.10.1.7845-testing

    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
    CVE-2021-42389 | CVE-DB