Description
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.
Remediation
References
https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d
https://bugzilla.redhat.com/show_bug.cgi?id=2007512
https://access.redhat.com/security/cve/CVE-2021-3827
https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v
Related Vulnerabilities
CVE-2023-31544 Vulnerability in maven package org.opencms:opencms-core
CVE-2023-37911 Vulnerability in maven package org.xwiki.platform:xwiki-platform-oldcore
CVE-2021-32624 Vulnerability in npm package keystone
CVE-2022-41340 Vulnerability in npm package @lionello/secp256k1-js
CVE-2020-17150 Vulnerability in npm package typescript-tslint-plugin