{"id":"CVE-2020-8554","state":"PUBLISHED","title":"Kubernetes man in the middle using LoadBalancer or ExternalIPs","description":"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.","publishedAt":"2021-01-21T17:09:21.169Z","updatedAt":"2026-06-01T21:44:19.351Z","severity":{"score":6.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","source":"kubernetes"},"assigner":"kubernetes","products":["Kubernetes Kubernetes"],"affected":[{"vendor":"Kubernetes","product":"Kubernetes","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"semver"}]}],"references":["https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/","https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8","https://github.com/kubernetes/kubernetes/issues/97076","https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E","https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%40%3Ccommits.druid.apache.org%3E","https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%40%3Ccommits.druid.apache.org%3E","https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%40%3Ccommits.druid.apache.org%3E","https://www.oracle.com//security-alerts/cpujul2021.html","https://www.oracle.com/security-alerts/cpujan2022.html","https://www.oracle.com/security-alerts/cpuapr2022.html"],"weaknesses":["CWE-283"],"ingestedAt":"2026-10-29T19:47:44.297Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/8xxx/CVE-2020-8554.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2020-8554","state":"PUBLISHED","datePublished":"2021-01-21T17:09:21.169Z","dateUpdated":"2026-06-01T21:44:19.351Z","assignerShortName":"kubernetes","assignerOrgId":"a6081bf6-c852-4425-ad4f-a67919267565","dateReserved":"2020-02-03T00:00:00.000Z"},"containers":{"cna":{"title":"Kubernetes man in the middle using LoadBalancer or ExternalIPs","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. 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."}],"affected":[{"vendor":"Kubernetes","product":"Kubernetes","versions":[{"version":"0","status":"affected","lessThan":"*","versionType":"semver"}]}],"references":[{"url":"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/","tags":["x_refsource_MISC"]},{"url":"https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8","tags":["x_refsource_MISC"]},{"url":"https://github.com/kubernetes/kubernetes/issues/97076","tags":["x_refsource_MISC"]},{"url":"https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E","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"]},{"url":"https://lists.apache.org/thread.html/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%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"]},{"url":"https://lists.apache.org/thread.html/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%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"]},{"url":"https://lists.apache.org/thread.html/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%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"]},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","tags":["x_refsource_MISC"]},{"url":"https://www.oracle.com/security-alerts/cpujan2022.html","tags":["x_refsource_MISC"]},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-283","description":"CWE-283 Unverified Ownership","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"kubernetes","orgId":"a6081bf6-c852-4425-ad4f-a67919267565","dateUpdated":"2026-06-01T21:44:19.351Z"},"credits":[{"lang":"en","value":"Etienne Champetier (@champtar) of Anevia"}],"datePublic":"2020-12-07T00:00:00.000Z","source":{"defect":["https://github.com/kubernetes/kubernetes/issues/97076"],"discovery":"EXTERNAL"},"workarounds":[{"lang":"en","value":"To restrict the use of external IPs we are providing an admission webhook container: k8s.gcr.io/multitenancy/externalip-webhook:v1.0.0. 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":[{"title":"CVE Program Container","references":[{"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","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://lists.apache.org/thread.html/rcafa485d63550657f068775801aeb706b7a07140a8ebbdef822b3bb3%40%3Ccommits.druid.apache.org%3E","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/r0c76b3d0be348f788cd947054141de0229af00c540564711e828fd40%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/rdb223e1b82e3d7d8e4eaddce8dd1ab87252e3935cc41c859f49767b6%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/r1975078e44d96f2a199aa90aa874b57a202eaf7f25f2fde6d1c44942%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://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","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T10:03:46.277Z"}}]}}}