#VU88792 Improper Authentication in Keycloak - CVE-2023-3597

Vulnerability identifier: #VU88792

Vulnerability risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

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