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.
Advisories
Source ID Title
EUVD EUVD EUVD-2022-1622 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.
Github GHSA Github GHSA GHSA-4pc7-vqv5-5r3v ECP SAML binding bypasses authentication flows
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-03T17:09:09.546Z

Reserved: 2021-09-24T00:00:00

Link: CVE-2021-3827

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-08-23T16:15:10.030

Modified: 2024-11-21T06:22:33.163

Link: CVE-2021-3827

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-09-02T00:00:00Z

Links: CVE-2021-3827 - Bugzilla

cve-icon OpenCVE Enrichment

No data.