Vulnerability identifier: #VU68302

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Dex
Server applications / Directory software, identity management

Vendor: Dex IdP

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 updates from vendor's website.

Vulnerable software versions

Dex: 2.0.0 - 2.34.0

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External links
http://github.com/dexidp/dex/security/advisories/GHSA-vh7g-p26c-j2cw
http://github.com/dexidp/dex/commit/49471b14c8080ddb034d4855841123d378b7a634

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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.