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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (42.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
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
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
- Red Hat Keycloak
- Red Hat Openshift Container Platform — versions 4.9, 4.10, 4.11
- Red Hat Single Sign-On — versions 7.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:3883 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2023:3884 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2023:3885 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2023:3888 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2023:3892 (vendor-advisory, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2023-2422 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (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.