#VU49113 Authentication Bypass by Capture-replay in Keycloak - CVE-2020-14302

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Main Vulnerability Database Vulnerabilities #VU49113

#VU49113 Authentication Bypass by Capture-replay in Keycloak - CVE-2020-14302

Published: December 15, 2020 / Updated: December 21, 2020


Vulnerability identifier: #VU49113
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-14302
CWE-ID: CWE-294
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Keycloak
Software 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.


Remediation

Install updates from vendor's website.

External links