#VU97622 Open redirect in Keycloak - CVE-2024-8883

Vulnerability identifier: #VU97622

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-8883

CWE-ID: CWE-601

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 redirect victims to arbitrary URL.

The vulnerability exists due to a misconfiguration when handling redirects. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary domain if a 'Valid Redirect URI' is set to http://localhost or http://127.0.0.1

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 20.0.0 - 25.0.5

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2312511
https://github.com/keycloak/keycloak/blob/main/services/src/main/java/org/keycloak/protocol/oidc/utils/RedirectUtils.java
https://github.com/advisories/GHSA-vvf8-2h68-9475
https://github.com/keycloak/keycloak/releases/tag/25.0.6
https://github.com/keycloak/keycloak/security/advisories/GHSA-w8gr-xwp4-r9f7

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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.