medium6.5
CVE-2020-27838
Keycloak discloses information without authentication
Impact
A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-core | < 13.0.0 | 13.0.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Redhat | Keycloak | before 13.0.0 |
| Redhat | Single Sign-On | Version 7.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1906797
- https://github.com/advisories/GHSA-pcv5-m2wh-66j3
- https://nvd.nist.gov/vuln/detail/CVE-2020-27838
- https://github.com/keycloak/keycloak/pull/7790
- https://github.com/keycloak/keycloak/commit/9356843c6c3d7097d010b3bb6f91e25fcaba378c