Vulnerability in Red Hat Single Sign-On 7
CVE-2023-2422
A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.
Vulnerability class: Improper Certificate Validation
EPSS: 0.005 (41.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Red Hat Single Sign-on 7
- Red Hat Single Sign-on 7.6 For Rhel 7 — versions 0:18.0.8-1.redhat_00001.1.el7sso
- Red Hat Single Sign-on 7.6 For Rhel 8 — versions 0:18.0.8-1.redhat_00001.1.el8sso
- Red Hat Single Sign-on 7.6 For Rhel 9 — versions 0:18.0.8-1.redhat_00001.1.el9sso
- Red Hat Rhel-8 Based Middleware Containers — versions 7.6-24
- Redhat Enterprise_linux — versions 7.0, 8.0, 9.0
- Redhat Keycloak
- Redhat Openshift_container_platform — versions 4.9, 4.10, 4.11
- Redhat Single_sign-on — versions 7.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-2422?
- CVE-2023-2422 is a medium-severity vulnerability in Red Hat Single Sign-On 7, classified under Improper Certificate Validation. CVSS score: 5.5/10. Published 2023-10-04.
- How severe is CVE-2023-2422?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-2422 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.