Concourse update for Dex

1) Information disclosure

EUVDB-ID: #VU68302

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-39222

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way OAuth are handled during the OIDC flow. A remote attacker can trick the victim to navigate to a malicious website and guiding them through the OIDC flow, steal the OAuth authorization code in the process. The authorization code then can be exchanged by the attacker for a token, gaining access to applications accepting that token.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Pivotal Concourse: 6.0.0 - 7.8.2

External links

http://github.com/concourse/concourse/releases/tag/v6.7.9
http://github.com/concourse/concourse/releases/tag/v7.8.3

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.