Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | keycloak | as shipped in Red Hat Single Sign-On 7.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 9.0.13-1.redhat_00006.1.el6sso | RHSA-2021:2065, RHSA-2021:2064, RHSA-2021:2063 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-services | < 18.0.0 | 18.0.0 | GHSA-pf38-cw3p-22q9 |
Advisories 4
- WID-SEC-2024-0794 Dell ECS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- RHSA-2021:2065 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.7 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:2064 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.7 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2021:2063 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.7 security update on RHEL 6 Red Hat Security Advisories (RHSA) · Jun 29, 2026