CVE & CISA-KEV Catalog

CVE-2023-2422

MEDIUM
5.5
CVSS v3
NVD

Description

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.

CWE-295Improper Certificate Validation

How to fix

Remediation Available
rh-sso-7/sso76Red Hat / RHEL
Fixed in:openshift-rhel8@sha256:d15acb2c2c6bed9934c011c6864ca5c2ae989f783390bdb3eca77f5fc4ccc92a_amd64RHSA-2023:3888
Fixed in:openshift-rhel8@sha256:f52cb785c11ab691e0583a69e665496af83b4191037742ef2b1dd1237f42722e_ppc64leRHSA-2023:3888
Fixed in:openshift-rhel8@sha256:b8452b9ca79791555bb4709a4d3c81768e0571f72fe88480be9dfd585e02913e_s390xRHSA-2023:3888
rh-sso-7/sso76Rocky
Fixed in:openshift-rhel8@sha256:d15acb2c2c6bed9934c011c6864ca5c2ae989f783390bdb3eca77f5fc4ccc92a_amd64RHSA-2023:3888
Fixed in:openshift-rhel8@sha256:f52cb785c11ab691e0583a69e665496af83b4191037742ef2b1dd1237f42722e_ppc64leRHSA-2023:3888
Fixed in:openshift-rhel8@sha256:b8452b9ca79791555bb4709a4d3c81768e0571f72fe88480be9dfd585e02913e_s390xRHSA-2023:3888
rh-sso7-keycloakRocky
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885
rh-sso7-keycloakRed Hat / RHEL
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885
rh-sso7-keycloak-serverRed Hat / RHEL
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885
rh-sso7-keycloak-serverRocky
Fixed in:0:18.0.8-1.redhat_00001.1.el7ssoRHSA-2023:3883
Fixed in:0:18.0.8-1.redhat_00001.1.el8ssoRHSA-2023:3884
Fixed in:0:18.0.8-1.redhat_00001.1.el9ssoRHSA-2023:3885

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityLow
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Exploit Intelligence

0.52%probability of exploitation in 30 days
41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-4000Low3.7100%-Fix
CVE-2020-0601High8.189%KEVFix
CVE-2009-3555Critical9.887%-Fix
CVE-2022-26923High8.883%KEVFix
CVE-2023-27823Critical9.853%--
CVE-2022-42979High8.824%--
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CVE-2023-2422 severity badge

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.