CVE-2018-5256

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2018-01-05T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "CoreOS Tectonic 1.7.x before 1.7.9-tectonic.4 and 1.8.x before 1.8.4-tectonic.3 mounts a direct proxy to the kubernetes cluster at /api/kubernetes/ which is accessible without authentication to Tectonic and allows an attacker to directly connect to the kubernetes API server. Unauthenticated users are able to list all Namespaces through the Console, resulting in an information disclosure. Tectonic's exposure of an unauthenticated API endpoint containing information regarding the internal state of the cluster can provide an attacker with information that may assist in other attacks against the cluster. For example, an attacker may not have the permissions required to list all namespaces in the cluster but can instead leverage this vulnerability to enumerate the namespaces and then begin to check each namespace for weak authorization policies that may allow further escalation of privileges."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-05-18T14:57:01.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2018-5256", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "CoreOS Tectonic 1.7.x before 1.7.9-tectonic.4 and 1.8.x before 1.8.4-tectonic.3 mounts a direct proxy to the kubernetes cluster at /api/kubernetes/ which is accessible without authentication to Tectonic and allows an attacker to directly connect to the kubernetes API server. Unauthenticated users are able to list all Namespaces through the Console, resulting in an information disclosure. Tectonic's exposure of an unauthenticated API endpoint containing information regarding the internal state of the cluster can provide an attacker with information that may assist in other attacks against the cluster. For example, an attacker may not have the permissions required to list all namespaces in the cluster but can instead leverage this vulnerability to enumerate the namespaces and then begin to check each namespace for weak authorization policies that may allow further escalation of privileges."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched", "refsource": "CONFIRM", "url": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched"}, {"name": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3", "refsource": "CONFIRM", "url": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T05:33:43.606Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2018-5256", "datePublished": "2018-05-18T15:00:00.000Z", "dateReserved": "2018-01-07T00:00:00.000Z", "dateUpdated": "2024-08-05T05:33:43.606Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:redhat:tectonic:*:*:*:*:*:*:*:*", "matchCriteriaId": "E9A37775-6C22-4B18-AB1D-198F1BE515AE", "versionEndExcluding": "1.7.9-tectonic.4", "versionStartIncluding": "1.7.1-tectonic.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:redhat:tectonic:*:*:*:*:*:*:*:*", "matchCriteriaId": "59EFB0A5-6C9E-45A4-AFA5-A95FD1B8B345", "versionEndExcluding": "1.8.4-tectonic.3", "versionStartIncluding": "1.8.4-tectonic.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "CoreOS Tectonic 1.7.x before 1.7.9-tectonic.4 and 1.8.x before 1.8.4-tectonic.3 mounts a direct proxy to the kubernetes cluster at /api/kubernetes/ which is accessible without authentication to Tectonic and allows an attacker to directly connect to the kubernetes API server. Unauthenticated users are able to list all Namespaces through the Console, resulting in an information disclosure. Tectonic's exposure of an unauthenticated API endpoint containing information regarding the internal state of the cluster can provide an attacker with information that may assist in other attacks against the cluster. For example, an attacker may not have the permissions required to list all namespaces in the cluster but can instead leverage this vulnerability to enumerate the namespaces and then begin to check each namespace for weak authorization policies that may allow further escalation of privileges."}, {"lang": "es", "value": "CoreOS Tectonic, en versiones 1.7.x anteriores a la 1.7.9-tectonic.4 y versiones 1.8.x anteriores a la 1.8.4-tectonic.3, monta un proxy directo al cl\u00faster kubernetes en /api/kubernetes/, que es accesible sin autenticaci\u00f3n en Tectonic y permite que un atacante se conecte directamente al servidor API de kubernetes. Los usuarios no autenticados pueden listar todos los nombres de espacio a trav\u00e9s de la consola, lo que resulta en una divulgaci\u00f3n de informaci\u00f3n. La exposici\u00f3n de Tectonic de un endpoint de API no autenticado que contiene informaci\u00f3n sobre el estado interno del cl\u00faster puede proveer a un atacante informaci\u00f3n que podr\u00eda ayudar en otros ataques contra el cl\u00faster. Por ejemplo, un atacante puede no tener los permisos necesarios para listar todos los espacios de nombre en el cl\u00faster, pero podr\u00eda aprovechar esta vulnerabilidad para enumerar los espacios de nombre y comenzar a comprobar cada uno en busca de pol\u00edticas de autorizaci\u00f3n d\u00e9biles que puedan permitir el escalado de privilegios."}], "id": "CVE-2018-5256", "lastModified": "2026-06-17T01:59:55.530", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-05-18T15:29:00.187", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://coreos.com/blog/tectonic-namespace-information-disclosure-vulnerability-patched"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://coreos.com/tectonic/releases/#1.8.4-tectonic.3"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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