Description
A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR). Client-provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server's HTTP response to a `request_uri` authorization request, possibly leading to an information disclosure vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | keycloak | — | — |
| Red Hat | Red Hat Build of Keycloak | — | — |
| Red Hat | Red Hat build of Keycloak 22 | — | — |
| Red Hat | Red Hat build of Keycloak 24 | — | — |
| Red Hat | Red Hat Single Sign-On 7 | — | — |
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 | — | — |
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 | — | — |
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 | — | — |
| Red Hat | RHEL-8 based Middleware Containers | — | — |
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 | 18.0.14-1.redhat_00001.1.el7sso | RHSA-2024:3568, RHSA-2024:3567, RHSA-2024:3566 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-services | < 24.0.5 | 24.0.5 | GHSA-69fp-7c8p-crjr |
Advisories 4
- RHSA-2024:3568 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.9 security update on RHEL 9 Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2024:3566 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.9 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2024:3567 Red Hat Security Advisory: Red Hat Single Sign-On 7.6.9 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Oct 10, 2026
- WID-SEC-2024-1279 Red Hat Single Sign On und Keycloak: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jun 3, 2024
References
- RHSA-2024:3566 vendor-advisory
- RHSA-2024:3567 vendor-advisory
- RHSA-2024:3568 vendor-advisory
- RHSA-2024:3570 vendor-advisory
- RHSA-2024:3572 vendor-advisory
- RHSA-2024:3573 vendor-advisory
- RHSA-2024:3574 vendor-advisory
- RHSA-2024:3575 vendor-advisory
- RHSA-2024:3576 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2024-4540 vdb-entry
- RHBZ#2279303 issue-tracking