High severityNVD Advisory· Published Aug 23, 2022· Updated Aug 3, 2024
CVE-2021-3827
CVE-2021-3827
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-saml-coreMaven | < 18.0.0 | 18.0.0 |
Affected products
2Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-4pc7-vqv5-5r3vghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-3827ghsaADVISORY
- access.redhat.com/security/cve/CVE-2021-3827ghsax_refsource_MISCWEB
- bugzilla.redhat.com/show_bug.cgighsax_refsource_MISCWEB
- github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0dghsax_refsource_MISCWEB
- github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3vghsax_refsource_MISCWEB
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