CVE-2021-3632 Keycloak allows anyone to register new security device or key for any user by using WebAuthn password-less login flow

What is CVE-2021-3632?

CVE-2021-3632 is a high-severity authentication bypass vulnerability in Redhat Keycloak, published on 26 Aug 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A flaw was found in Keycloak. This vulnerability allows anyone to register a new security device or key when there is not a device already registered for any user by using the WebAuthn password-less login flow.

Weakness: CWE-287

Which versions are affected by CVE-2021-3632?

2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 2 products.

Products include Redhat Keycloak, Redhat Single Sign-On.

How do I fix CVE-2021-3632?

Upgrade org.keycloak:keycloak-core to 15.1.0 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-3632 being exploited?

There is no known exploitation of CVE-2021-3632 in the wild and no public exploit code.

Other vulnerabilities in Redhat Keycloak

• CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC Critical 10.0
• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3

All Redhat Keycloak vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qpq9-jpv4-6gwr.