Oauth client impersonation
CVE-2023-2422

7.1HIGH

Key Information:

Vendor

Red Hat
Status
keycloak
Red Hat Single Sign-On 7
Red Hat Single Sign-On 7.6 for RHEL 7
Red Hat Single Sign-On 7.6 for RHEL 8
Vendor
CVE Published:
4 October 2023

What is CVE-2023-2422?

A flaw in Keycloak's implementation of mTLS authentication for OAuth/OpenID clients allows clients with valid certificates to bypass proper verification of the client certificate chain. This vulnerability could enable a malicious client to impersonate other clients, potentially leading to unauthorized access to sensitive data. Organizations using Keycloak for identity and access management need to review their configurations to ensure robust security against this exploit.

Affected Version(s)

keycloak 18.0

Red Hat Single Sign-On 7.6 for RHEL 7 0:18.0.8-1.redhat_00001.1.el7sso

Red Hat Single Sign-On 7.6 for RHEL 8 0:18.0.8-1.redhat_00001.1.el8sso

References

https://access.redhat.com/errata/RHSA-2023:3883
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:3884
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:3885
vendor-advisoryx_refsource_REDHAT

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.