{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-22T20:58:08.097","vulnerabilities":[{"cve":{"id":"CVE-2023-41333","sourceIdentifier":"security-advisories@github.com","published":"2023-09-27T15:19:30.163","lastModified":"2024-11-21T08:21:05.760","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with the ability to create or modify CiliumNetworkPolicy objects in a particular namespace is able to affect traffic on an entire Cilium cluster, potentially bypassing policy enforcement in other namespaces. By using a crafted `endpointSelector` that uses the `DoesNotExist` operator on the `reserved:init` label, the attacker can create policies that bypass namespace restrictions and affect the entire Cilium cluster. This includes potentially allowing or denying all traffic. This attack requires API server access, as described in the Kubernetes API Server Attacker section of the Cilium Threat Model. This issue has been resolved in Cilium versions 1.14.2, 1.13.7, and 1.12.14. As a workaround an admission webhook can be used to prevent the use of `endpointSelectors` that use the `DoesNotExist` operator on the `reserved:init` label in CiliumNetworkPolicies.\n"},{"lang":"es","value":"Cilium es una solución de redes, observabilidad y seguridad con un plano de datos basado en eBPF. Un atacante con la capacidad de crear o modificar objetos CiliumNetworkPolicy en un espacio de nombres particular puede afectar el tráfico en un clúster Cilium completo, evitando potencialmente la aplicación de políticas en otros espacios de nombres. Al utilizar un `endpointSelector` manipulado que utiliza el operador `DoesNotExist` en la etiqueta `reserved:init`, el atacante puede crear políticas que eludan las restricciones del espacio de nombres y afecten a todo el clúster de Cilium. Esto incluye potencialmente permitir o denegar todo el tráfico. Este ataque requiere acceso al servidor API, como se describe en la sección Atacante del servidor API de Kubernetes del modelo de amenazas de Cilium. Este problema se resolvió en las versiones 1.14.2, 1.13.7 y 1.12.14 de Cilium. Como workaround, se puede utilizar un webhook de admisión para evitar el uso de `endpointSelectors` que utilizan el operador `DoesNotExist` en la etiqueta `reserved:init` en CiliumNetworkPolicies."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H","baseScore":6.9,"baseSeverity":"MEDIUM","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.7,"impactScore":4.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.7,"impactScore":5.8}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-306"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*","versionEndExcluding":"1.12.14","matchCriteriaId":"35ABDE15-4D2F-4F82-BA90-6529DBA75C4F"},{"vulnerable":true,"criteria":"cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*","versionStartIncluding":"1.13.0","versionEndExcluding":"1.13.7","matchCriteriaId":"FAD54EC5-459F-43CF-8C36-BB84717CD640"},{"vulnerable":true,"criteria":"cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*","versionStartIncluding":"1.14.0","versionEndExcluding":"1.14.2","matchCriteriaId":"F8854A94-3A9D-4BCD-AC5C-2D8AEF70AA40"}]}]}],"references":[{"url":"https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker","source":"security-advisories@github.com","tags":["Product"]},{"url":"https://github.com/cilium/cilium/pull/28007","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx","source":"security-advisories@github.com","tags":["Mitigation","Patch","Third Party Advisory"]},{"url":"https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product"]},{"url":"https://github.com/cilium/cilium/pull/28007","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mitigation","Patch","Third Party Advisory"]}]}}]}