Vulnerability identifier: #VU88799

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-1249

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

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

Vendor: Keycloak

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to "checkLoginIframe" allows unvalidated cross-origin messages. A remote attacker can send millions of requests in seconds using simple code, significantly impacting the application's availability without proper origin validation for incoming messages.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 22.0.0 - 24.0.2

---

External links
http://github.com/keycloak/keycloak/security/advisories/GHSA-m6q9-p373-g5q8
http://access.redhat.com/errata/RHSA-2024:1867
http://access.redhat.com/errata/RHSA-2024:1868

---

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.