CVE-2021-3424
First published: Fri Feb 26 2021(Updated: )
A flaw was found in keycloak as shipped in Red Hat Single Sign-On 7.4 where IDN homograph attacks are possible. A malicious user can register himself with a name already registered and trick admin to grant him extra privileges.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/keycloak | <18.0.0 | 18.0.0 |
| redhat/rh-sso7-keycloak | <0:9.0.13-1.redhat_00006.1.el6 | 0:9.0.13-1.redhat_00006.1.el6 |
| redhat/rh-sso7-keycloak | <0:9.0.13-1.redhat_00006.1.el7 | 0:9.0.13-1.redhat_00006.1.el7 |
| redhat/rh-sso7-keycloak | <0:9.0.13-1.redhat_00006.1.el8 | 0:9.0.13-1.redhat_00006.1.el8 |
| Redhat Single Sign-on | =7.4 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1933320
- https://issues.redhat.com/browse/KEYCLOAK-17256
- https://access.redhat.com/errata/RHSA-2021:2063
- https://access.redhat.com/errata/RHSA-2021:2065
- https://access.redhat.com/errata/RHSA-2021:2064
- https://access.redhat.com/security/cve/cve-2021-3424
- https://access.redhat.com/errata/RHSA-2021:2070
- https://www.cve.org/CVERecord?id=CVE-2021-3424 https://nvd.nist.gov/vuln/detail/CVE-2021-3424 https://github.com/keycloak/keycloak/security/advisories/GHSA-mwm4-5qwr-g9pf
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2021-3424?
CVE-2021-3424 is a vulnerability in Keycloak, as shipped in Red Hat Single Sign-On 7.4, that allows IDN homograph attacks.
What is the severity of CVE-2021-3424?
The severity of CVE-2021-3424 is medium with a CVSS score of 5.3.
How does CVE-2021-3424 affect me?
CVE-2021-3424 allows a malicious user to register a name that already exists and trick an admin to grant extra privileges, posing an integrity threat.
How can I fix CVE-2021-3424?
To fix CVE-2021-3424, update the affected software to version 18.0.0 for Keycloak or apply the specific security patches provided by Red Hat for Red Hat Single Sign-On 7.4.
Where can I find more information about CVE-2021-3424?
You can find more information about CVE-2021-3424 on the CVE website, NIST NVD database, GitHub security advisory, Red Hat Bugzilla, and Red Hat errata page.
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