Vulnerability identifier: #VU49113

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14302

CWE-ID: CWE-294

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 bypass authentication process.

The vulnerability exists due to the way Keycloak hadles authentication via external identity providers. After successful authentication the user is redirected to a Keycloak endpoint that accepts multiple invocations with the use of the same "state" parameter. A remote attacker can perform a replay attack and bypass authentication process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Keycloak: 0.6.0 - 12.0.0

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1849584

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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.