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CVE-2020-36327

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Date: April 28, 2021

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.

Language: Ruby

Severity Score

Related Resources (18)

https://github.com/rubygems/rubygems/pull/4609
https://github.com/rubygems/rubygems/commit/078bf682ac40017b309b5fc69f283ff640e7c129
https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bundler/CVE-2020-36327.yml
https://github.com/rubygems/rubygems/blob/master/bundler/CHANGELOG.md#2218-may-25-2021
https://mensfeld.pl/2021/02/rubygems-dependency-confusion-attack-side-of-things
https://security-tracker.debian.org/tracker/CVE-2020-36327
https://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327
https://access.redhat.com/security/cve/CVE-2020-36327
https://github.com/rubygems/rubygems/issues/3982
https://nvd.nist.gov/vuln/detail/CVE-2020-36327
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105
https://bundler.io/blog/2021/02/15/a-more-secure-bundler-we-fixed-our-source-priorities.html
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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL
https://github.com/rubygems/rubygems
https://www.mend.io/vulnerability-database/CVE-2020-36327

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

Top Fix

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Upgrade Version

Upgrade to version bundler - 2.2.10;bundler - 2.2.18

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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