CVE-2022-23634

    Dashboard / Vulnerabilities / CVE-2022-23634

    CVE-2022-23634

    Published: 11 Feb 2022Last Modified: 9 Sept 2026

    Summary: Information Exposure when using Puma with Rails

    Details: Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.

    References: https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23634.json, https://github.com/advisories/GHSA-rmj8-8hhh-gv5h, https://github.com/advisories/GHSA-wh98-p28r-vrc9, https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/, https://nvd.nist.gov/vuln/detail/CVE-2022-23634, https://security.gentoo.org/glsa/202208-28, https://www.debian.org/security/2022/dsa-5146, https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb, https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html, https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -4ce94d7975d755f5ecdf50c5134b6d8af081e3ad

    Affected versions

    v4.3.10
    v4.3.9
    v4.3.8
    v4.3.7
    v4.3.6
    v4.3.5
    v4.3.4
    v4.3.3
    v4.3.2
    v4.3.1
    v4.3.0

    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-2022-23634 | CVE-DB