#VU71549 Session Fixation in Keycloak Authentication - CVE-2023-24456

Vulnerability identifier: #VU71549

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-24456

CWE-ID: CWE-384

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Keycloak Authentication
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected plugin does not invalidate the existing session on login. A remote attacker can gain administrator access to Jenkins.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Keycloak Authentication: 1.0.1 - 2.3.0

---

External links
https://jenkins.io/security/advisory/2023-01-24/

---

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.