CVE-2020-36327 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24105 https://github.com/rubygems/rubygems/issues/3982 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://www.zofrex.com/blog/2021/04/29/bundler-still-vulnerable-dependency-confusion-cve-2020-36327/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWXHK5UUHVSHF7HTHMX6JY3WXDVNIHSL/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8