Concourse's GitLab auth allows impersonation
CVE-2020-5415

10CRITICAL

Key Information:

Vendor

Vmware Tanzu

Status
Concourse
Vendor
CVE Published:
12 August 2020

What is 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.

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Affected Version(s)

Concourse 6.4 < 6.4.1

Concourse 6.3 < 6.3.1

References

https://github.com/concourse/concourse/security/advisorie...
x_refsource_CONFIRM
https://tanzu.vmware.com/security/cve-2020-5415
x_refsource_CONFIRM

CVSS V3.1

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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