CVE-2020-36327

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    CVE-2020-36327

    Published: 29 Apr 2021Last Modified: 27 Aug 2026

    Summary:

    Details: Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.16 sometimes chooses a dependency source based on the highest gem version number, which means that a rogue gem found at a public source may be chosen, even if the intended choice was a private gem that is a dependency of another private gem that is explicitly depended on by the application. NOTE: it is not correct to use CVE-2021-24105 for every "Dependency Confusion" issue in every product.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/, https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html, https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things/, https://github.com/rubygems/rubygems/issues/3982, https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105, https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 10f20fa33bc36371cbad00106487c6eb22616ec7
    Fixed -cc7c3337218989b3a6aad3910eb4f9c74cdd4f56

    Affected versions

    v3.2.16
    v3.2.15
    v3.2.14
    v3.2.13
    v3.2.12
    v3.2.11

    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-2020-36327 | CVE-DB