{"containers": {"cna": {"affected": [{"product": "Kubernetes", "vendor": "Kubernetes", "versions": [{"status": "affected", "versionType": "semver", "version": "0", "lessThan": "*"}]}], "credits": [{"lang": "en", "value": "Etienne Champetier (@champtar) of Anevia"}], "datePublic": "2020-12-07T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. 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The source code and deployment instructions are published at https://github.com/kubernetes-sigs/externalip-webhook.\n\nAlternatively, external IPs can be restricted using OPA Gatekeeper. A sample ConstraintTemplate and Constraint can be found here: https://github.com/open-policy-agent/gatekeeper-library/tree/master/library/general/externalip."}], "x_generator": {"engine": "Vulnogram 0.0.9"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T10:03:46.277Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/kubernetes/kubernetes/issues/97076"}, {"name": "[druid-commits] 20210201 [GitHub] [druid] jon-wei opened a new pull request #10826: Address CVE-2020-8570, suppress CVE-2020-8554", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E"}, {"name": "[druid-commits] 20210202 [GitHub] [druid] jon-wei opened a new pull request #10826: Address CVE-2020-8570, suppress CVE-2020-8554", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E"}, {"name": "[druid-commits] 20210203 [GitHub] [druid] jihoonson commented on pull request #10826: Address CVE-2020-8570, suppress CVE-2020-8554", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E"}, {"name": "[druid-commits] 20210203 [GitHub] [druid] jihoonson merged pull request #10826: Address CVE-2020-8570, suppress CVE-2020-8554", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.oracle.com//security-alerts/cpujul2021.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.oracle.com/security-alerts/cpujan2022.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}]}]}, "cveMetadata": {"assignerOrgId": "a6081bf6-c852-4425-ad4f-a67919267565", "assignerShortName": "kubernetes", "cveId": "CVE-2020-8554", "datePublished": "2021-01-21T17:09:21.169Z", "dateReserved": "2020-02-03T00:00:00.000Z", "dateUpdated": "2026-06-01T21:44:19.351Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

{}

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Adicionalmente, un atacante que sea capaz de parchear el estado (que se considera una operaci\u00f3n privilegiada y no se debe t\u00edpicamente otorgar a los usuarios) de un servicio LoadBalancer puede configurar el status.loadBalancer.ingress.ip con un efecto similar"}], "id": "CVE-2020-8554", "lastModified": "2026-06-01T23:16:13.740", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 6.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 6.8, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.3, "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:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.4, "source": "jordan@liggitt.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-01-21T17:15:13.843", "references": [{"source": "jordan@liggitt.net", "tags": ["Exploit", "Third Party Advisory"], 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{"acknowledgement": "Red Hat would like to thank the Kubernetes Product Security Committee for reporting this issue. Upstream acknowledges Etienne Champetier (Anevia) as the original reporter.", "affected_release": [{"advisory": "RHSA-2021:0079", "cpe": "cpe:/a:redhat:openshift:3.11::el7", "package": "atomic-openshift-0:3.11.374-1.git.0.ebd3ee9.el7", "product_name": "Red Hat OpenShift Container Platform 3.11", "release_date": "2021-01-20T00:00:00Z"}], "bugzilla": {"description": "kubernetes: MITM using LoadBalancer or ExternalIPs", "id": "1891051", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1891051"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "status": "verified"}, "cwe": "CWE-200", "details": ["Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.", "A flaw was found in kubernetes. If a potential attacker can already create or edit services and pods, then they may be able to intercept traffic from other pods (or nodes) in the cluster."], "mitigation": {"lang": "en:us", "value": "ExternalIP addresses ranges can be configured as described below. OCP 4 is secure by default, though cluster-admins can whitelist externalIP addresses as needed. OCP 3.11 can be secured by changing `externalIPNetworkCIDR` to \"0.0.0.0/32\", which blocks all externalIP address values.\nhttps://docs.openshift.com/container-platform/4.6/networking/configuring_ingress_cluster_traffic/configuring-externalip.html\nhttps://docs.openshift.com/container-platform/3.11/admin_guide/tcp_ingress_external_ports.html#service-externalip\nUsers can check if they have permission to patch the Status of a LoadBalancer Service with the command: `kubectl auth can-i patch service --subresource=status`. In OCP, by default only cluster-admins are granted this permission."}, "name": "CVE-2020-8554", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:storage:3", "fix_state": "Not affected", "package_name": "heketi", "product_name": "Red Hat Storage 3"}], "public_date": "2020-12-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-8554\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-8554\nhttps://blog.champtar.fr/K8S_MITM_LoadBalancer_ExternalIPs/\nhttps://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8"], "statement": "OpenShift Container Platform (OCP) includes a builtin externalIP admission plugin, which restricts the use of Service eternalIPs to those configured by a cluster-admin. In OCP4 all externalIP ranges are disabled by default. In OCP 3.11, the default range is \"0.0.0.0/0\", which allows all IP addresses.\nThe second attack vector, via patching the Status of a LoadBalancer Service, is not possible unless permission to patch service/status is granted. OCP does not grant this permission to users who are not cluster-admins.\nOCP 4 is not affected by this vulnerability as it is secure by default. OCP 3.11 is affected, however the vulnerability can be by mitigated by configuring the builtin externalIP admission plugin.", "threat_severity": "Moderate"}

{}