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Dependency Confusion in Bundler

High severity GitHub Reviewed Published May 24, 2021 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

bundler bundler (RubyGems)

Affected versions

>= 1.16.0, < 2.2.10
>= 2.2.11, < 2.2.18

Patched versions

2.2.10
2.2.18

Description

Bundler 1.16.0 through 2.2.9 and 2.2.11 through 2.2.17 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.

References

Published by the National Vulnerability Database Apr 29, 2021
Reviewed May 20, 2021
Published to the GitHub Advisory Database May 24, 2021
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS score

1.078%
(84th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2020-36327

GHSA ID

GHSA-fp4w-jxhp-m23p

Source code

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