CVE-2020-8558
Kubernetes node setting allows for neighboring hosts to bypass localhost boundary
- Published
- Updated
- Reserved
- Assigned by
- kubernetes
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| kubernetesCNA (assigner) | 3.1 | Medium5.4 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
- affected prior to 1.18.4
- affected prior to 1.17.7
- affected prior to 1.16.11
- affected 1.15
- affected 1.14
- affected 1.13
- affected 1.12
- affected 1.11
- affected 1.10
- affected 1.9
- affected 1.8
- affected 1.7
- affected 1.6
- affected 1.5
- affected 1.4
- affected 1.3
- affected 1.2
- affected 1.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gok8s.io/kubernetesGHSA-wqv3-8cm6-h6wg (opens in a new tab)
References (3)
- https://github.com/kubernetes/kubernetes/issues/92315 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [Security Advisory] CVE-2020-8558: Kubernetes: Node setting allows for neighboring hosts to bypass localhost boundary (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://security.netapp.com/advisory/ntap-20200821-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-wqv3-8cm6-h6wg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-8558)Record last updated .