Improper Authentication Affecting rh-sso7-keycloak-server package, versions <0:15.0.4-1.redhat_00001.1.el7sso


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.11% (45th percentile)

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  • Snyk IDSNYK-RHEL7-RHSSO7KEYCLOAKSERVER-4455147
  • published26 Mar 2023
  • disclosed2 Sept 2021

Introduced: 2 Sep 2021

CVE-2021-3827  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade RHEL:7 rh-sso7-keycloak-server to version 0:15.0.4-1.redhat_00001.1.el7sso or higher.
This issue was patched in RHSA-2022:0151.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rh-sso7-keycloak-server package and not the rh-sso7-keycloak-server package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.

CVSS Scores

version 3.1