# CVE-2020-8552: Kubernetes API server denial of service > Attackers can cause a denial of service in the Kubernetes API server by sending successful API requests, requiring administrators to upgrade the cluster. - **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 27 Mar 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-8552, GHSA-82hx-w2r5-c2wq, RHBA-2020:0929, RHBA-2020:2215, RHSA-2020:1527 ## What is CVE-2020-8552? CVE-2020-8552 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 27 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description The Kubernetes API server component in versions prior to 1.15.9, 1.16.0-1.16.6, and 1.17.0-1.17.2 has been found to be vulnerable to a denial of service attack via successful API requests. Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-789 (Memory Allocation with Excessive Size Value) ## Which versions are affected by CVE-2020-8552? 6 open source packages ship an affected version, including k8s.io/apiserver. It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `k8s.io/apiserver` | Go | All versions | 0.15.10 | | `k8s.io/apiserver` | Go | All versions | 0.15.10 | | `k8s.io/apiserver` | Go | From 0.16.0 | 0.16.7 | | `k8s.io/apiserver` | Go | From 0.16.0 | 0.16.7 | | `k8s.io/apiserver` | Go | From 0.17.0 | 0.17.3 | | `k8s.io/apiserver` | Go | From 0.17.0 | 0.17.3 | | `atomic-enterprise-service-catalog` | Red Hat:openshift:3.11::el7 | All versions | 1:3.11.219-1.git.1.717017c.el7 | | `atomic-enterprise-service-catalog-svcat` | Red Hat:openshift:3.11::el7 | All versions | 1:3.11.219-1.git.1.717017c.el7 | | `atomic-openshift` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-clients` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-clients-redistributable` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-cluster-autoscaler` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.1ad3e34.el7 | | `atomic-openshift-descheduler` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.7e5b9ee.el7 | | `atomic-openshift-docker-excluder` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-dockerregistry` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.8323991.el7 | | `atomic-openshift-excluder` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-hyperkube` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-hypershift` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-master` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-metrics-server` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.6fe54fb.el7 | | `atomic-openshift-node` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-node-problem-detector` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.5ae8753.el7 | | `atomic-openshift-pod` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-sdn-ovs` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-service-idler` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.958cdae.el7 | | `atomic-openshift-template-service-broker` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `atomic-openshift-tests` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.0c21387.el7 | | `golang-github-openshift-oauth-proxy` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.076ae14.el7 | | `golang-github-prometheus-alertmanager` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.9a593f8.el7 | | `golang-github-prometheus-node_exporter` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.7fa9674.el7 | | `golang-github-prometheus-prometheus` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.3f6e657.el7 | | `openshift-ansible` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.8845382.el7 | | `openshift-ansible-docs` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.8845382.el7 | | `openshift-ansible-playbooks` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.8845382.el7 | | `openshift-ansible-roles` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.8845382.el7 | | `openshift-ansible-test` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.0.8845382.el7 | | `openshift-enterprise-autoheal` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.c544df9.el7 | | `openshift-enterprise-cluster-capacity` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.ca1ee51.el7 | | `openshift-kuryr` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.717d59f.el7 | | `openshift-kuryr-cni` | Red Hat:openshift:3.11::el7 | All versions | 0:3.11.219-1.git.1.717d59f.el7 | Products: Fedoraproject Fedora, Kubernetes Kubernetes. ## How do I fix CVE-2020-8552? Upgrade k8s.io/apiserver to a fixed version for your release line: 0.15.10, 0.16.7 or 0.17.3. ## Is CVE-2020-8552 being exploited? There is no known exploitation of CVE-2020-8552 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-8552 and fix it if it is affected. What it is: CVE-2020-8552 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 27 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-8552 in the wild and no public exploit code. Affected packages and fixed versions: - k8s.io/apiserver (Go): affected all versions; fixed in 0.15.10 - k8s.io/apiserver (Go): affected all versions; fixed in 0.15.10 - k8s.io/apiserver (Go): affected from 0.16.0; fixed in 0.16.7 - k8s.io/apiserver (Go): affected from 0.16.0; fixed in 0.16.7 - k8s.io/apiserver (Go): affected from 0.17.0; fixed in 0.17.3 - k8s.io/apiserver (Go): affected from 0.17.0; fixed in 0.17.3 Task: 1. 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. 2. 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. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-8552/ (Markdown: https://insights.sbomify.com/CVE-2020-8552/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8552 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8552 - OSV: https://osv.dev/vulnerability/CVE-2020-8552 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-8552/ Summaries are generated and may contain mistakes; the official description above is the record.