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Keycloak has lack of validation of access token on client registrations endpoint

Moderate severity GitHub Reviewed Published Jan 12, 2023 in keycloak/keycloak • Updated Jan 23, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

<= 20.0.2

Patched versions

20.0.3

Description

When a service account with the create-client or manage-clients role can use the client-registration endpoints to create/manage clients with an access token.

If the access token is leaked, there is an option to revoke the specific token. However, the check is not performed in client-registration endpoints.

References

@abstractj abstractj published to keycloak/keycloak Jan 12, 2023
Published to the GitHub Advisory Database Jan 12, 2023
Reviewed Jan 12, 2023
Published by the National Vulnerability Database Jan 13, 2023
Last updated Jan 23, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS score

0.054%
(25th percentile)

Weaknesses

CVE ID

CVE-2023-0091

GHSA ID

GHSA-v436-q368-hvgg

Source code

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