by Kastro
Paper/Archive/CVE-2020-5415

CVE-2020-5415

VMware Tanzu Concourse — Concourse's GitLab auth allows impersonation

EPSS 1%CVSS 10.0
critical.is priorityof 100
44
CVSS 10.0 (CNA, NVD agree)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 68.6.686 × 2013.7No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Concourse6.4 – < 6.4.16.4.1CNA
Concourse6.3 – < 6.3.16.3.1CNA

Scores by source

NVD10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
pivotal (CNA)10.0CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

References

refgithub.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rjreftanzu.vmware.com/security/cve-2020-5415