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    CVE-2020-36327

    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.

    Published:Feb 9, 2021
    Last Modified:Nov 21, 2024
    EPS:Apr 29, 2021
    EPSS Score:0.11934
    CVSS Score:8.8

    Affected Products

    Vendor
    Bundler
    Product
    Bundler
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Microsoft
    Product
    Package Manager Configurations
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Software Collections

    Exploits

    https://github.com/rubygems/rubygems/issues/3982https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/https://github.com/rubygems/rubygems/issues/3982https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/

    References

    https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html
    https://github.com/rubygems/rubygems/issues/3982
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/
    https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things/
    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/
    https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html
    https://github.com/rubygems/rubygems/issues/3982
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/
    https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things/
    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/

    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