CVE-2020-5415

Concourse's GitLab auth allows impersonation

Published Aug 12, 2020 CVSS 3.1 · 10.0 Critical EPSS 1.2% KEV · Not listed
Description
Concourse, versions prior to 6.3.1 and 6.4.1, in installations which use the GitLab auth connector, is vulnerable to identity spoofing by way of configuring a GitLab account with the same full name as another user who is granted access to a Concourse team. GitLab groups do not have this vulnerability, so GitLab users may be moved into groups which are then configured in the Concourse team.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-2453 Concourse, versions prior to 6.3.1 and 6.4.1, in installations which use the GitLab auth connector, is vulnerable to identity spoofing by way of configuring a GitLab account with the same full name as another user who is granted access to a Concourse team. GitLab groups do not have this vulnerability, so GitLab users may be moved into groups which are then configured in the Concourse team.
Github GHSA Github GHSA GHSA-627p-rr78-99rj GitLab auth uses full name instead of username as user ID, allowing impersonation
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
pivotal
Published
Updated
Sep 16, 2024, 5:53 PM
Reserved
Jan 3, 2020, 12:00 AM
Status
Modified
Published
Aug 12, 2020, 5:15 PM
Modified
Jun 17, 2026, 3:21 AM