Information disclosure in Red Hat build of Keycloak 24.0

1) Information disclosure

EUVDB-ID: #VU93088

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-4540

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to an error in the OAuth 2.0 Pushed Authorization Requests (PAR) implementation. Client provided parameters are included in plain text in to the KC_RESTART cookie returned by the authorization server's HTTP response to a request_uri authorization request. A local user with access to the system can use the cookie to gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat build of Keycloak: before 24.0.5

CPE2.3

External links

http://access.redhat.com/errata/RHSA-2024:3575

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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