Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.121
EPSS Ranking 93.5%
CVSS Severity
CVSS v3 Score 8.8
CVSS v2 Score 9.3
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/
Products affected by CVE-2020-36327
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cpe:2.3:a:bundler:bundler:1.16.0
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cpe:2.3:a:bundler:bundler:1.16.1
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cpe:2.3:a:bundler:bundler:1.16.2
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cpe:2.3:a:bundler:bundler:1.16.3
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cpe:2.3:a:bundler:bundler:1.16.4
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cpe:2.3:a:bundler:bundler:1.16.5
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cpe:2.3:a:bundler:bundler:1.16.6
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cpe:2.3:a:bundler:bundler:1.17.0
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cpe:2.3:a:bundler:bundler:1.17.1
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cpe:2.3:a:bundler:bundler:1.17.2
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cpe:2.3:a:bundler:bundler:1.17.3
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cpe:2.3:a:bundler:bundler:2.0.0
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cpe:2.3:a:bundler:bundler:2.0.1
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cpe:2.3:a:bundler:bundler:2.0.2
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cpe:2.3:a:bundler:bundler:2.1.0
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cpe:2.3:a:bundler:bundler:2.1.1
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cpe:2.3:a:bundler:bundler:2.1.2
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cpe:2.3:a:bundler:bundler:2.1.3
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cpe:2.3:a:bundler:bundler:2.1.4
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cpe:2.3:a:bundler:bundler:2.2.0
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cpe:2.3:a:bundler:bundler:2.2.1
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cpe:2.3:a:bundler:bundler:2.2.11
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cpe:2.3:a:bundler:bundler:2.2.12
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cpe:2.3:a:bundler:bundler:2.2.13
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cpe:2.3:a:bundler:bundler:2.2.14
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cpe:2.3:a:bundler:bundler:2.2.15
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cpe:2.3:a:bundler:bundler:2.2.16
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cpe:2.3:a:bundler:bundler:2.2.2
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cpe:2.3:a:bundler:bundler:2.2.3
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cpe:2.3:a:bundler:bundler:2.2.4
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cpe:2.3:a:bundler:bundler:2.2.5
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cpe:2.3:a:bundler:bundler:2.2.6
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cpe:2.3:a:bundler:bundler:2.2.7
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cpe:2.3:a:bundler:bundler:2.2.8
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cpe:2.3:a:bundler:bundler:2.2.9
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cpe:2.3:a:microsoft:package_manager_configurations:-
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cpe:2.3:o:fedoraproject:fedora:34