CVE-2024-9666

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Cuando Keycloak est\u00e1 configurado para aceptar encabezados de proxy entrantes, puede aceptar valores que no sean IP, como identificadores ofuscados, sin una validaci\u00f3n adecuada. Este problema puede generar costosas operaciones de resoluci\u00f3n de DNS, que un atacante podr\u00eda aprovechar para bloquear subprocesos de E/S y potencialmente causar una denegaci\u00f3n de servicio. El atacante debe tener acceso para enviar solicitudes a una instancia de Keycloak que est\u00e9 configurada para aceptar encabezados de proxy, espec\u00edficamente cuando los servidores proxy inversos no sobrescriben los encabezados entrantes y Keycloak est\u00e1 configurado para confiar en estos encabezados."}], "id": "CVE-2024-9666", "lastModified": "2026-09-21T06:16:59.443", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-9666", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-25T17:14:55.721958Z", "version": "2.0.3"}}]}, "published": "2024-11-25T08:15:10.943", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:10175"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:10176"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:10177"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2024:10178"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2024-9666"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2317440"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2024:10175", "cpe": "cpe:/a:redhat:build_keycloak:24::el9", "package": "rhbk/keycloak-operator-bundle:24.0.9-1", "product_name": "Red Hat build of Keycloak 24", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10175", "cpe": "cpe:/a:redhat:build_keycloak:24::el9", "package": "rhbk/keycloak-rhel9:24-18", "product_name": "Red Hat build of Keycloak 24", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10175", "cpe": "cpe:/a:redhat:build_keycloak:24::el9", "package": "rhbk/keycloak-rhel9-operator:24-18", "product_name": "Red Hat build of Keycloak 24", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10176", "cpe": "cpe:/a:redhat:build_keycloak:24", "package": "org.keycloak/keycloak-quarkus-server", "product_name": "Red Hat build of Keycloak 24.0.9", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10177", "cpe": "cpe:/a:redhat:build_keycloak:26.0::el9", "package": "rhbk/keycloak-operator-bundle:26.0.6-2", "product_name": "Red Hat build of Keycloak 26.0", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10177", "cpe": "cpe:/a:redhat:build_keycloak:26.0::el9", "package": "rhbk/keycloak-rhel9:26.0-5", "product_name": "Red Hat build of Keycloak 26.0", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10177", "cpe": "cpe:/a:redhat:build_keycloak:26.0::el9", "package": "rhbk/keycloak-rhel9-operator:26.0-6", "product_name": "Red Hat build of Keycloak 26.0", "release_date": "2024-11-21T00:00:00Z"}, {"advisory": "RHSA-2024:10178", "cpe": "cpe:/a:redhat:build_keycloak:26", "package": "org.keycloak/keycloak-quarkus-server", "product_name": "Red Hat build of Keycloak 26.0.6", "release_date": "2024-11-21T00:00:00Z"}], "bugzilla": {"description": "org.keycloak/keycloak-quarkus-server: Keycloak proxy header handling Denial-of-Service (DoS) vulnerability", "id": "2317440", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2317440"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-444", "details": ["A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service.\nThe attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.", "A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service.\nThe attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers."], "name": "CVE-2024-9666", "package_state": [{"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Affected", "package_name": "org.keycloak/keycloak-quarkus-server", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}], "public_date": "2024-11-21T16:45:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-9666\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-9666"], "statement": "Red Hat Enterprise Application Server 8 does not ship the affected component and so is not affected by this flaw.", "threat_severity": "Low"}

{}