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Improper authorization of users and groups with the same base name in Jenkins GitLab Authentication Plugin

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 28, 2023

Package

maven org.jenkins-ci.plugins:gitlab-oauth (Maven)

Affected versions

<= 1.5

Patched versions

1.6

Description

GitLab Authentication Plugin 1.5 and earlier does not differentiate between user names and hierarchical group names when performing authorization. This allows an attacker with permissions to create groups in GitLab to gain the privileges granted to another user or group.

GitLab Authentication Plugin 1.6 performs user name and group name authorization checks using the appropriate GitLab APIs.

References

Published by the National Vulnerability Database Jul 15, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Dec 28, 2022
Last updated Jan 28, 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
High
Privileges required
None
User interaction
None
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:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.104%
(44th percentile)

Weaknesses

CVE ID

CVE-2020-2228

GHSA ID

GHSA-qq38-mxpq-rrpj

Source code

Credits

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