CVE-2020-5415

HIGH7.5EPSS 0.26%

Concourse's GitLab auth allows impersonation

Published: 12/20/2021Modified: 5/20/2025

Also known as:GHSA-627p-rr78-99rjBIT-concourse-2020-5415

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.

Affected packages (3)

Bitnami/concoursefrom 0, < 6.3.1, >= 6.4.0, < 6.4.1
Go/github.com/concourse/concourse>= 6.4.0, < 6.4.1
Go/github.com/concourse/dex>= 6.4.0, < 6.4.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (3)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-5415
WEBhttps://github.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rj
WEBhttps://tanzu.vmware.com/security/cve-2020-5415