Vulnerability identifier: #VU70166

Vulnerability risk: Low

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3916

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 attacker to gain access to sensitive information.

The vulnerability exists due to reuse of session ids across root and user authentication sessions when using a client with the offline_access scope. An attacker with ability to obtain the root session ID can utilize the refresh token and authenticate to the application as another user.

The issue affects shared environments, where the attacker is able to obtain victim's cookies after the victim logs out.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 1.0 - 19.0.2

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External links
http://github.com/keycloak/keycloak/security/advisories/GHSA-97g8-xfvw-q4hg

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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.