{"answers":{"affected":"14 open source packages ship an affected version, including k8s.io/kubernetes and k8s.io/apimachinery. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-8559 in the wild and no public exploit code.","fix":"Upgrade k8s.io/kubernetes to a fixed version for your release line: 1.16.13, 1.17.9 or 1.18.7.","what":"CVE-2020-8559 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 22 Jul 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-8559 and fix it if it is affected.\n\nWhat it is: CVE-2020-8559 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 22 Jul 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-8559 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.13, 1.17.9, 1.18.7\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.13\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.13\n- k8s.io/kubernetes (Go): affected from 1.17.0; fixed in 1.17.9\n- k8s.io/kubernetes (Go): affected from 1.17.0; fixed in 1.17.9\n- k8s.io/kubernetes (Go): affected from 1.18.0; fixed in 1.18.7\n- k8s.io/kubernetes (Go): affected from 1.18.0; fixed in 1.18.7\n- k8s.io/apimachinery (Go): affected all versions; fixed in 0.16.13, 0.17.9, 0.18.7-rc.0\n- k8s.io/apimachinery (Go): affected all versions; fixed in 0.16.13\n- k8s.io/apimachinery (Go): affected all versions; fixed in 0.16.13\n- k8s.io/apimachinery (Go): affected from 0.17.0; fixed in 0.17.9\n- k8s.io/apimachinery (Go): affected from 0.17.0; fixed in 0.17.9\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-2020-8559/ (Markdown: https://insights.sbomify.com/CVE-2020-8559/index.md)","id":"CVE-2020-8559","markdown":"https://insights.sbomify.com/CVE-2020-8559/index.md","name":"CVE-2020-8559","record":{"aliases":["CLEANSTART-2025-JT47341","CLEANSTART-2026-JX77218","CLEANSTART-2026-RN37949","DEBIAN-CVE-2020-8559","GHSA-33c5-9fx5-fvjm","GO-2024-2748","RHSA-2021:0030"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Kubernetes API server","requires_auth":"high_privilege","summary":"An attacker with node access can exploit an unvalidated redirect in proxied upgrade requests to escalate privileges to full cluster control.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"kubernetes","cpe":[{"product":"kubernetes","vendor":"kubernetes"}],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.","ecosystems":["Go","Red Hat:openshift:4.4::el7","Red Hat:openshift:4.4::el8"],"exploits":{"exploitdb":0,"first_seen":"2020-07-22","github_poc":2,"max_poc_stars":53,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-07-22T08:36:41Z","kind":"github_poc","ref":"https://github.com/tdwyer/CVE-2020-8559","stars":53,"title":"This is a PoC exploit for CVE-2020-8559 Kubernetes Vulnerability "},{"date":"2020-07-22T05:13:01Z","kind":"github_poc","ref":"https://github.com/tabbysable/POC-2020-8559","stars":20,"title":"Proof of Concept exploit for Kubernetes CVE-2020-8559"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Privilege escalation from compromised node to cluster","id":"CVE-2020-8559","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"kubernetes:kubernetes","products":["kubernetes:kubernetes"],"type":"open_redirect","year":"2020"},"n_packages":18,"n_references":3,"next":{"headline":"Webhook redirect in kube-apiserver","id":"CVE-2020-8561"},"packages":[{"ecosystem":"Go","fixed":["0.16.13","0.17.9","0.18.7-rc.0"],"introduced":["0","0.17.0","0.18.0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":"pkg:golang/k8s.io/apimachinery","source":"GO-2024-2748"},{"ecosystem":"Go","fixed":["0.16.13"],"introduced":["0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["0.16.13"],"introduced":["0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":"pkg:golang/k8s.io/apimachinery","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["0.17.9"],"introduced":["0.17.0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["0.17.9"],"introduced":["0.17.0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":"pkg:golang/k8s.io/apimachinery","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["0.18.7"],"introduced":["0.18.0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["0.18.7"],"introduced":["0.18.0"],"last_affected":[],"package":"k8s.io/apimachinery","purl":"pkg:golang/k8s.io/apimachinery","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.16.13","1.17.9","1.18.7"],"introduced":["0","1.17.0","1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GO-2024-2748"},{"ecosystem":"Go","fixed":["1.16.13"],"introduced":["0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.16.13"],"introduced":["0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.17.9"],"introduced":["1.17.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.17.9"],"introduced":["1.17.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.18.7"],"introduced":["1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Go","fixed":["1.18.7"],"introduced":["1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-33c5-9fx5-fvjm"},{"ecosystem":"Red Hat:openshift:4.4::el7","fixed":["0:4.4.0-202012052258.p0.git.0.0fd57a4.el7"],"introduced":["0"],"last_affected":[],"package":"openshift","purl":"pkg:rpm/redhat/openshift","source":"RHSA-2021:0030"},{"ecosystem":"Red Hat:openshift:4.4::el7","fixed":["0:4.4.0-202012052258.p0.git.0.0fd57a4.el7"],"introduced":["0"],"last_affected":[],"package":"openshift-hyperkube","purl":"pkg:rpm/redhat/openshift-hyperkube","source":"RHSA-2021:0030"},{"ecosystem":"Red Hat:openshift:4.4::el8","fixed":["0:4.4.0-202012052258.p0.git.0.0fd57a4.el8"],"introduced":["0"],"last_affected":[],"package":"openshift","purl":"pkg:rpm/redhat/openshift","source":"RHSA-2021:0030"},{"ecosystem":"Red Hat:openshift:4.4::el8","fixed":["0:4.4.0-202012052258.p0.git.0.0fd57a4.el8"],"introduced":["0"],"last_affected":[],"package":"openshift-hyperkube","purl":"pkg:rpm/redhat/openshift-hyperkube","source":"RHSA-2021:0030"}],"prev":{"headline":"Kubernetes node setting allows for neighboring hosts to bypass localhost boundary","id":"CVE-2020-8558"},"products":["Kubernetes"],"published":"2020-07-22","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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2024-09-16","vendors":["Kubernetes"]},"summary":"An attacker with node access can exploit an unvalidated redirect in proxied upgrade requests to escalate privileges to full cluster control.","url":"https://insights.sbomify.com/CVE-2020-8559/"}