Vulnerability identifier: #VU88796

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-0657

CWE-ID: CWE-613

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 implemented security restrictions.

The vulnerability exists due to software does not properly enforce token types when validating signatures locally. An authenticated user can use this flaw to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.

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-7fpj-9hr8-28vh
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.