Vulnerability Details : CVE-2020-5415
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.
Products affected by CVE-2020-5415
- cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*
- cpe:2.3:a:pivotal_software:concourse:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-5415
0.26%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 46 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-5415
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:P/A:N |
10.0
|
4.9
|
NIST | |
|
10.0
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L |
3.9
|
6.0
|
Pivotal Software, Inc. | |
|
10.0
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
3.9
|
5.8
|
NIST |
CWE ids for CVE-2020-5415
-
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.Assigned by:
- nvd@nist.gov (Primary)
- security@pivotal.io (Secondary)
References for CVE-2020-5415
-
https://github.com/concourse/concourse/security/advisories/GHSA-627p-rr78-99rj
GitLab auth uses full name instead of username as user ID, allowing impersonation · Advisory · concourse/concourse · GitHubPatch;Third Party Advisory
-
https://tanzu.vmware.com/security/cve-2020-5415
CVE-2020-5415: Concourse's GitLab auth allows impersonation | Security | VMware TanzuThird Party Advisory
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