Improper Authentication in Pivotal Concourse - CVE-2020-5415
Published: August 17, 2020
Vulnerability identifier: #VU45747
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-5415
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests. Installations which use the GitLab auth connector, are 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.
Affected software
Pivotal Concourse
How to mitigate CVE-2020-5415
Install updates from vendor's website.
Pivotal Concourse - addressed in versions 6.3.1, 6.4.1