Vulnerability identifier: #VU77342

Vulnerability risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34246

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Doorkeeper
Client/Desktop applications / Other client software

Vendor: doorkeeper gem

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Doorkeeper: 5.6.0 - 5.6.5

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External links
http://github.com/doorkeeper-gem/doorkeeper/pull/1646
http://github.com/doorkeeper-gem/doorkeeper/releases/tag/v5.6.6
http://www.rfc-editor.org/rfc/rfc8252#section-8.6
http://github.com/doorkeeper-gem/doorkeeper/security/advisories/GHSA-7w2c-w47h-789w
http://github.com/doorkeeper-gem/doorkeeper/issues/1589

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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.