CVE-2023-6544

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This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."}, {"lang": "es", "value": "Se encontr\u00f3 una falla en el paquete Keycloak. Este problema se produce debido a una expresi\u00f3n regular permisiva codificada para el filtrado que permite a los hosts registrar un cliente din\u00e1mico. Un usuario malintencionado con suficiente informaci\u00f3n sobre el entorno podr\u00eda poner en peligro un entorno con este registro din\u00e1mico de cliente espec\u00edfico y esta configuraci\u00f3n de TrustedDomain previamente no autorizada."}], "id": "CVE-2023-6544", "lastModified": "2026-06-17T06:50:57.267", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-6544", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-04-25T19:19:09.097776Z", "version": "2.0.3"}}]}, "published": "2024-04-25T16:15:10.097", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1860"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1861"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1862"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1864"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1866"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1867"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:1868"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2023-6544"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1860"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1861"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1862"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1864"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1866"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1867"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2024:1868"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/security/cve/CVE-2023-6544"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-625"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Bastian Kanbach (Secure Systems DE [bastian.kanbach@securesystems.de]) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2024:1867", "cpe": "cpe:/a:redhat:build_keycloak:22::el9", "package": "rhbk/keycloak-operator-bundle:22.0.10-1", "product_name": "Red Hat build of Keycloak 22", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1867", "cpe": "cpe:/a:redhat:build_keycloak:22::el9", "package": "rhbk/keycloak-rhel9:22-13", "product_name": "Red Hat build of Keycloak 22", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1867", "cpe": "cpe:/a:redhat:build_keycloak:22::el9", "package": "rhbk/keycloak-rhel9-operator:22-16", "product_name": "Red Hat build of Keycloak 22", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1868", "cpe": "cpe:/a:redhat:build_keycloak:22", "package": "keycloak-core", "product_name": "Red Hat build of Keycloak 22.0.10", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1860", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el7", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el7sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 7", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1861", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el8", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el8sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 8", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1862", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6::el9", "package": "rh-sso7-keycloak-0:18.0.13-1.redhat_00001.1.el9sso", "product_name": "Red Hat Single Sign-On 7.6 for RHEL 9", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1864", "cpe": "cpe:/a:redhat:rhosemc:1.0::el8", "package": "rh-sso-7/sso76-openshift-rhel8:7.6-46", "product_name": "RHEL-8 based Middleware Containers", "release_date": "2024-04-16T00:00:00Z"}, {"advisory": "RHSA-2024:1866", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7.6", "package": "keycloak-core", "product_name": "RHSSO 7.6.8", "release_date": "2024-04-16T00:00:00Z"}], "bugzilla": {"description": "keycloak: Authorization Bypass", "id": "2253116", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-625", "details": ["A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.", "A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."], "mitigation": {"lang": "en:us", "value": "No mitigation is currently available for this flaw."}, "name": "CVE-2023-6544", "public_date": "2024-04-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-6544\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-6544"], "statement": "Due to the high complexity of this attack, Red Hat considers this a Moderate impact.", "threat_severity": "Moderate"}

{}