UBUNTU-CVE-2024-21647

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    UBUNTU-CVE-2024-21647

    Published: 8 Jan 2024Last Modified: 4 Feb 2026
    Upstream:
    CVE-2024-21647

    Summary:

    Details: Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.

    References: https://ubuntu.com/security/CVE-2024-21647, https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2, https://ubuntu.com/security/notices/USN-6597-1, https://ubuntu.com/security/notices/USN-6682-1, https://www.cve.org/CVERecord?id=CVE-2024-21647

    Affected packages

    Package

    Name: puma

    Purl: pkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-apps/focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.12.4-1ubuntu2+esm1

    Affected versions

    3.12.0-2ubuntu1
    3.12.0-4ubuntu1
    3.12.4-1ubuntu2

    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
    UBUNTU-CVE-2024-21647 | CVE-DB