CVE-2021-3827GHSA-4PC7-VQV5-5R3V
A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 18.0.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- n/a keycloak
Fixed in v18.0.0
- org.keycloak:keycloak-saml-coreMaven
fixed in 18.0.0