CVE-2023-0657

A flaw was found in Keycloak. This issue occurs due to improperly enforcing token types when validating signatures locally. This could allow an authenticated attacker to exchange a logout token for an access token and possibly gain access to data outside of enforced permissions.

Weakness

The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

Affected Software

Name	Vendor	Start Version	End Version
Red Hat build of Keycloak 22	RedHat	rhbk/keycloak-operator-bundle:22.0.10-1	*
Red Hat build of Keycloak 22	RedHat	rhbk/keycloak-rhel9:22-13	*
Red Hat build of Keycloak 22	RedHat	rhbk/keycloak-rhel9-operator:22-16	*
Red Hat build of Keycloak 22.0.10	RedHat	keycloak	*

Potential Mitigations

Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2023-0657
CWE	https://cwe.mitre.org/data/definitions/273.html

Improper Check for Dropped Privileges

Weakness

Affected Software

Potential Mitigations

References