Kubernetes API server denial of service
Published Mar 27, 2020
5.3
MEDIUMCVSS 3.1
EPSS 2.41%
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.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<v1.15.10
- Version unspecifiedStatusaffectedConstraints<v1.16.7
- Version unspecifiedStatusaffectedConstraints<v1.17.3
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kubernetes | Kubernetes | n/a |
|
Configuration 1
- ≤ 1.15.9
- ≥ 1.16.0 · ≤ 1.16.6
- ≥ 1.17.0 · ≤ 1.17.2
Configuration 2
- 32
No data.
Red Hat OpenShift Container Platform 3.11
atomic-enterprise-service-catalog-1:3.11.219-1.git.1.717017c.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-0:3.11.219-1.git.0.0c21387.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-0:3.11.248-1.git.0.92ee8ac.el7
Fixed · RHSA-2020:2992
Red Hat OpenShift Container Platform 3.11
atomic-openshift-cluster-autoscaler-0:3.11.219-1.git.1.1ad3e34.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-descheduler-0:3.11.219-1.git.1.7e5b9ee.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-dockerregistry-0:3.11.219-1.git.1.8323991.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-metrics-server-0:3.11.219-1.git.1.6fe54fb.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-node-problem-detector-0:3.11.219-1.git.1.5ae8753.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
atomic-openshift-service-idler-0:3.11.219-1.git.1.958cdae.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
golang-github-openshift-oauth-proxy-0:3.11.219-1.git.1.076ae14.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-alertmanager-0:3.11.219-1.git.1.9a593f8.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-node_exporter-0:3.11.219-1.git.1.7fa9674.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
golang-github-prometheus-prometheus-0:3.11.219-1.git.1.3f6e657.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
openshift-ansible-0:3.11.219-1.git.0.8845382.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
openshift-enterprise-autoheal-0:3.11.219-1.git.1.c544df9.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
openshift-enterprise-cluster-capacity-0:3.11.219-1.git.1.ca1ee51.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 3.11
openshift-kuryr-0:3.11.219-1.git.1.717d59f.el7
Fixed · RHBA-2020:2215
Red Hat OpenShift Container Platform 4.2
openshift-0:4.2.29-202004110432.git.0.f7d02c8.el8
Fixed · RHSA-2020:1527
Red Hat OpenShift Container Platform 4.2
openshift4/ose-hyperkube:v4.2.29-202004140532
Fixed · RHSA-2020:1526
Red Hat OpenShift Container Platform 4.2
openshift4/ose-openshift-apiserver-rhel7:v4.2.34-202005252115
Fixed · RHSA-2020:2306
Red Hat OpenShift Container Platform 4.3
openshift-0:4.3.9-202003230116.git.0.ebf9a26.el7
Fixed · RHBA-2020:0929
Red Hat OpenShift Container Platform 4.3
openshift4/ose-hyperkube:v4.3.9-202003230345
Fixed · RHBA-2020:0930
Red Hat OpenShift Container Platform 4.3
openshift4/ose-openshift-apiserver-rhel7:v4.3.9-202003230345
Fixed · RHSA-2020:0933
Red Hat OpenShift Container Platform 4
openshift4/ose-hypershift
Will not fix
Red Hat OpenShift Container Platform 4
openshift4/ose-service-catalog
Will not fix
Red Hat Storage 3
heketi
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | atomic-enterprise-service-catalog-1:3.11.219-1.git.1.717017c.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-0:3.11.219-1.git.0.0c21387.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-0:3.11.248-1.git.0.92ee8ac.el7 | Fixed | RHSA-2020:2992 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-cluster-autoscaler-0:3.11.219-1.git.1.1ad3e34.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-descheduler-0:3.11.219-1.git.1.7e5b9ee.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-dockerregistry-0:3.11.219-1.git.1.8323991.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-metrics-server-0:3.11.219-1.git.1.6fe54fb.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-node-problem-detector-0:3.11.219-1.git.1.5ae8753.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift-service-idler-0:3.11.219-1.git.1.958cdae.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-openshift-oauth-proxy-0:3.11.219-1.git.1.076ae14.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-alertmanager-0:3.11.219-1.git.1.9a593f8.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-node_exporter-0:3.11.219-1.git.1.7fa9674.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | golang-github-prometheus-prometheus-0:3.11.219-1.git.1.3f6e657.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | openshift-ansible-0:3.11.219-1.git.0.8845382.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | openshift-enterprise-autoheal-0:3.11.219-1.git.1.c544df9.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | openshift-enterprise-cluster-capacity-0:3.11.219-1.git.1.ca1ee51.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 3.11 | openshift-kuryr-0:3.11.219-1.git.1.717d59f.el7 | Fixed | RHBA-2020:2215 |
| Red Hat OpenShift Container Platform 4.2 | openshift-0:4.2.29-202004110432.git.0.f7d02c8.el8 | Fixed | RHSA-2020:1527 |
| Red Hat OpenShift Container Platform 4.2 | openshift4/ose-hyperkube:v4.2.29-202004140532 | Fixed | RHSA-2020:1526 |
| Red Hat OpenShift Container Platform 4.2 | openshift4/ose-openshift-apiserver-rhel7:v4.2.34-202005252115 | Fixed | RHSA-2020:2306 |
| Red Hat OpenShift Container Platform 4.3 | openshift-0:4.3.9-202003230116.git.0.ebf9a26.el7 | Fixed | RHBA-2020:0929 |
| Red Hat OpenShift Container Platform 4.3 | openshift4/ose-hyperkube:v4.3.9-202003230345 | Fixed | RHBA-2020:0930 |
| Red Hat OpenShift Container Platform 4.3 | openshift4/ose-openshift-apiserver-rhel7:v4.3.9-202003230345 | Fixed | RHSA-2020:0933 |
| Red Hat OpenShift Container Platform 4 | openshift4/ose-hypershift | Will not fix | n/a |
| Red Hat OpenShift Container Platform 4 | openshift4/ose-service-catalog | Will not fix | n/a |
| Red Hat Storage 3 | heketi | Not affected | n/a |
k8s.io/apiserver
Go
Introduced 0 Fixed 0.15.10k8s.io/apiserver
Go
Introduced 0.16.0 Fixed 0.16.7k8s.io/apiserver
Go
Introduced 0.17.0 Fixed 0.17.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | k8s.io/apiserver | 0 | 0.15.10 |
| Go | k8s.io/apiserver | 0.16.0 | 0.16.7 |
| Go | k8s.io/apiserver | 0.17.0 | 0.17.3 |
Remediation
Red Hat mitigation
Prevent unauthenticated or unauthorized access to all APIs
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
1 other source (GHSA) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.41% (0.02408) | 83.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.41% (0.02408) | 81.87th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.16% (0.00161) | 34.54th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.17% (0.00166) | 54.59th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.17% (0.00166) | 53.14th | v3 (v2023.03.01) |
| May 8, 2023 | 0.10% (0.00104) | 41.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00081) | 33.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.73% (0.06726) | 78.88th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.55% (0.05553) | 80.10th | v1 |
| Jan 6, 2022 | 5.55% (0.05553) | 79.90th | v1 |
| Sep 1, 2021 | 1.29% (0.01294) | 69.02th | v1 |
| Apr 14, 2021 | 1.29% (0.01294) | 0.00th | v1 |
References (13)
- https://access.redhat.com/security/cve/CVE-2020-8552 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1797909 Issue Tracking
- https://github.com/advisories/GHSA-82hx-w2r5-c2wq Advisory
- https://github.com/kubernetes/kubernetes/commit/5978856c4c7f10737a11c9540fe60b8475beecbb
- https://github.com/kubernetes/kubernetes/issues/89378 x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://github.com/kubernetes/kubernetes/pull/87669
- https://groups.google.com/forum/#!topic/kubernetes-security-announce/2UOlsba2g0s
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/2UOlsba2g0s x_refsource_MISC
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
- https://nvd.nist.gov/vuln/detail/CVE-2020-8552
- https://security.netapp.com/advisory/ntap-20200413-0003/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-8552
Change history (0)
No recorded changes yet.