CVE-2023-47118

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    CVE-2023-47118

    Published: 20 Dec 2023Last Modified: 12 Aug 2026

    Summary: Heap buffer overflow in T64 codec decompression

    Details: ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer overflow issue was discovered in ClickHouse server. An attacker could send a specially crafted payload to the native interface exposed by default on port 9000/tcp, triggering a bug in the decompression logic of T64 codec that crashes the ClickHouse server process. This attack does not require authentication. Note that this exploit can also be triggered via HTTP protocol, however, the attacker will need a valid credential as the HTTP authentication take places first. This issue has been fixed in version 23.10.2.13-stable, 23.9.4.11-stable, 23.8.6.16-lts and 23.3.16.7-lts.

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Affected versions

    v23.3.15.29-lts
    v23.3.14.78-lts
    v23.3.13.6-lts
    v23.3.12.11-lts
    v23.3.11.5-lts
    v23.3.10.5-lts
    v23.3.9.55-lts
    v23.3.8.21-lts
    v23.3.7.5-lts
    v23.3.6.7-lts
    v23.3.5.9-lts
    v23.3.2.37-lts
    v23.3.4.17-lts
    v23.3.3.52-lts
    v23.3.1.2823-lts

    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-2023-47118 | CVE-DB