{"answers":{"affected":"2 open source packages ship an affected version, including k8s.io/kubernetes. It affects 4 products.","exploited":"There is no known exploitation of CVE-2020-8554 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-8554 is a medium-severity missing authorization vulnerability in Kubernetes Kubernetes, published on 21 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-8554 and fix it if it is affected.\n\nWhat it is: CVE-2020-8554 is a medium-severity missing authorization vulnerability in Kubernetes Kubernetes, published on 21 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-8554 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- k8s.io/kubernetes (Go): affected all versions up to 1.22.0; no fix listed\n- k8s.io/kubernetes (Go): affected all versions up to 1.22.0; no fix listed\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-8554/ (Markdown: https://insights.sbomify.com/CVE-2020-8554/index.md)","id":"CVE-2020-8554","markdown":"https://insights.sbomify.com/CVE-2020-8554/index.md","name":"CVE-2020-8554","record":{"aliases":["AZL-31696","AZL-31731","AZL-34893","AZL-35135","DEBIAN-CVE-2020-8554","GHSA-j9wf-vvm6-4r9w","MINI-45wf-rj4q-954c","MINI-99pr-pcpc-28fv","MINI-9gv3-q5w9-g939","MINI-cg84-h9rw-qp9p","MINI-cvvg-wf97-99mr","MINI-jq26-hqvx-4fhw","MINI-m9fm-fx9q-p38x","MINI-p3cx-827f-6cwx","MINI-p795-gc5c-58qg","MINI-rv8h-r558-g388","MINI-v2v9-qc6q-3h55","MINI-vjp8-rq2q-hm9c"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Kubernetes API server","requires_auth":"low_privilege","summary":"Attackers with service creation privileges can intercept traffic by setting external IPs or patching LoadBalancer status, requiring API server updates.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"kubernetes","cpe":[{"product":"kubernetes","vendor":"kubernetes"},{"product":"communications_cloud_native_core_network_slice_selection_function","vendor":"oracle"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"product":"communications_cloud_native_core_service_communication_proxy","vendor":"oracle"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-283","name":"Unverified Ownership"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2020-12-01","github_poc":5,"max_poc_stars":3,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-12-01T16:58:39Z","kind":"github_poc","ref":"https://github.com/rancher/externalip-webhook","stars":3,"title":"CVE-2020-8554: Man in the middle using LoadBalancer or ExternalIPs"},{"date":"2020-12-11T17:40:47Z","kind":"github_poc","ref":"https://github.com/jrmurray000/CVE-2020-8554","stars":1,"title":"Mitigate CVE-2020-8554 with Policy Controller in Anthos"},{"date":"2020-12-20T04:22:43Z","kind":"github_poc","ref":"https://github.com/twistlock/k8s-cve-2020-8554-mitigations","stars":1,"title":"Prisma Cloud Compute Admission rules to mitigate Kubernetes CVE-2020-8554"},{"date":"2021-01-21T22:41:50Z","kind":"github_poc","ref":"https://github.com/Dviejopomata/CVE-2020-8554","stars":0,"title":null},{"date":"2021-02-09T21:29:44Z","kind":"github_poc","ref":"https://github.com/alebedev87/gatekeeper-cve-2020-8554","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Kubernetes man in the middle using LoadBalancer or ExternalIPs","id":"CVE-2020-8554","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"kubernetes:kubernetes","products":["kubernetes:kubernetes","oracle:communications_cloud_native_core_policy"],"type":"missing_authorization","year":"2020"},"n_packages":2,"n_references":10,"next":{"headline":"Kubernetes kube-controller-manager SSRF","id":"CVE-2020-8555"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.22.0"],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-j9wf-vvm6-4r9w"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.22.0"],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-j9wf-vvm6-4r9w"}],"prev":{"headline":"Kubernetes ingress-nginx Compromise of auth via subset/superset namespace names","id":"CVE-2020-8553"},"products":["Kubernetes"],"published":"2021-01-21","related":[{"cvss_score":9.8,"headline":"Privilege Escalation in Kubernetes","id":"CVE-2018-1002105","kev_date_added":null,"published":"2018-12-05"},{"cvss_score":9.8,"headline":"Kubernetes Privilege Escalation","id":"CVE-2017-1000056","kev_date_added":null,"published":"2017-07-13"},{"cvss_score":9.8,"headline":"Authorization bypass in Openshift","id":"CVE-2016-1906","kev_date_added":null,"published":"2016-02-03"},{"cvss_score":8.8,"headline":"Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation","id":"CVE-2023-3676","kev_date_added":null,"published":"2023-10-31"},{"cvss_score":8.8,"headline":"Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation","id":"CVE-2023-3955","kev_date_added":null,"published":"2023-10-31"},{"cvss_score":8.8,"headline":"Symlink Exchange Can Allow Host Filesystem Access","id":"CVE-2021-25741","kev_date_added":null,"published":"2021-09-20"},{"cvss_score":8.8,"headline":"Path traversal in Kubernetes","id":"CVE-2017-1002101","kev_date_added":null,"published":"2018-03-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-06-01","vendors":["Kubernetes"]},"summary":"Attackers with service creation privileges can intercept traffic by setting external IPs or patching LoadBalancer status, requiring API server updates.","url":"https://insights.sbomify.com/CVE-2020-8554/"}