{"answers":{"affected":"7 open source packages ship an affected version, including k8s.io/kubernetes. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-8558 in the wild and no public exploit code.","fix":"Upgrade k8s.io/kubernetes to a fixed version for your release line: 1.16.11, 1.17.7 or 1.18.4.","what":"CVE-2020-8558 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 27 Jul 2020."},"fix_prompt":"Check this codebase for CVE-2020-8558 and fix it if it is affected.\n\nWhat it is: CVE-2020-8558 is a medium-severity vulnerability in Kubernetes Kubernetes, published on 27 Jul 2020. \nExploitation: There is no known exploitation of CVE-2020-8558 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.11, 1.17.7, 1.18.4\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.11\n- k8s.io/kubernetes (Go): affected all versions; fixed in 1.16.11\n- k8s.io/kubernetes (Go): affected from 1.17.0; fixed in 1.17.7\n- k8s.io/kubernetes (Go): affected from 1.17.0; fixed in 1.17.7\n- k8s.io/kubernetes (Go): affected from 1.18.0; fixed in 1.18.4\n- k8s.io/kubernetes (Go): affected from 1.18.0; fixed in 1.18.4\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-2020-8558/ (Markdown: https://insights.sbomify.com/CVE-2020-8558/index.md)","id":"CVE-2020-8558","markdown":"https://insights.sbomify.com/CVE-2020-8558/index.md","name":"CVE-2020-8558","record":{"aliases":["CLEANSTART-2025-WT23235","DEBIAN-CVE-2020-8558","GHSA-wqv3-8cm6-h6wg","GO-2022-0885","RHSA-2020:3183"],"analysis":null,"analysis_generated_by":null,"assigner":"kubernetes","cpe":[{"product":"kubernetes","vendor":"kubernetes"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-420","name":"Unprotected Alternate Channel"}],"description":"The Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the node's network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.","ecosystems":["Go","Red Hat:openshift:4.3::el7","Red Hat:openshift:4.3::el8"],"exploits":{"exploitdb":0,"first_seen":"2020-07-09","github_poc":2,"max_poc_stars":43,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-07-09T06:56:07Z","kind":"github_poc","ref":"https://github.com/tabbysable/POC-2020-8558","stars":43,"title":"Information about Kubernetes CVE-2020-8558, including proof of concept exploit."},{"date":"2020-07-17T14:59:55Z","kind":"github_poc","ref":"https://github.com/rhysemmas/martian-packets","stars":3,"title":"Crafting raw TCP/IP packets to send to poorly configured Kubernetes servers - CVE-2020-8558 PoC"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Kubernetes node setting allows for neighboring hosts to bypass localhost boundary","id":"CVE-2020-8558","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"kubernetes:kubernetes","products":["kubernetes:kubernetes"],"type":null,"year":"2020"},"n_packages":11,"n_references":3,"next":{"headline":"Privilege escalation from compromised node to cluster","id":"CVE-2020-8559"},"packages":[{"ecosystem":"Go","fixed":["1.16.11","1.17.7","1.18.4"],"introduced":["0","1.17.0","1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GO-2022-0885"},{"ecosystem":"Go","fixed":["1.16.11"],"introduced":["0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Go","fixed":["1.16.11"],"introduced":["0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Go","fixed":["1.17.7"],"introduced":["1.17.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Go","fixed":["1.17.7"],"introduced":["1.17.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Go","fixed":["1.18.4"],"introduced":["1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":null,"source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Go","fixed":["1.18.4"],"introduced":["1.18.0"],"last_affected":[],"package":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","source":"GHSA-wqv3-8cm6-h6wg"},{"ecosystem":"Red Hat:openshift:4.3::el7","fixed":["0:4.3.31-202007280738.p0.git.0.9884401.el7"],"introduced":["0"],"last_affected":[],"package":"openshift","purl":"pkg:rpm/redhat/openshift","source":"RHSA-2020:3183"},{"ecosystem":"Red Hat:openshift:4.3::el7","fixed":["0:4.3.31-202007280738.p0.git.0.9884401.el7"],"introduced":["0"],"last_affected":[],"package":"openshift-hyperkube","purl":"pkg:rpm/redhat/openshift-hyperkube","source":"RHSA-2020:3183"},{"ecosystem":"Red Hat:openshift:4.3::el8","fixed":["0:4.3.31-202007280738.p0.git.0.9884401.el8"],"introduced":["0"],"last_affected":[],"package":"openshift","purl":"pkg:rpm/redhat/openshift","source":"RHSA-2020:3183"},{"ecosystem":"Red Hat:openshift:4.3::el8","fixed":["0:4.3.31-202007280738.p0.git.0.9884401.el8"],"introduced":["0"],"last_affected":[],"package":"openshift-hyperkube","purl":"pkg:rpm/redhat/openshift-hyperkube","source":"RHSA-2020:3183"}],"prev":{"headline":"Kubernetes node disk Denial of Service by writing to container /etc/hosts","id":"CVE-2020-8557"},"products":["Kubernetes"],"published":"2020-07-27","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":null,"url":"https://insights.sbomify.com/CVE-2020-8558/"}