Vulnerability identifier: #VU88792

Vulnerability risk: Low

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

CVE-ID: CVE-2023-3597

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

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

Vendor: Keycloak

Description

The vulnerability allows a remote user to bypass 2FA authentication process.

The vulnerability exists due to Keycloak does not correctly validate its client step-up authentication in org.keycloak.authentication. A remote user authenticated with password can use this flaw to register a false second authentication factor along with existing one and bypass authentication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 22.0.0 - 24.0.2

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External links
http://github.com/keycloak/keycloak/security/advisories/GHSA-4f53-xh3v-g8x4
http://access.redhat.com/errata/RHSA-2024:1867
http://access.redhat.com/errata/RHSA-2024:1868

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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