High severity · published Oct 4, 2023
CVE-2023-2422
Keycloak: oauth client impersonation
7.1
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RB
RHEL-8 based Middleware Containers · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Single Sign-On 7.6 for RHEL 9 · Red Hat
All versions, or not specified · source: vendor
KE
Keycloak · Redhat
All versions, or not specified · source: NVD
OC
Openshift Container Platform · Redhat
4.9; 4.10; 4.11; 4.12 · source: NVD
SS
Single Sign-on · Redhat
7.6 · source: NVD
Affected product
RH
Red Hat Single Sign-On 7.6 for RHEL 7
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-2422
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-2422
Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3883
Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3884
Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3885
Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3888
Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3892
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-2422
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