CVE-2020-8558
HIGH8.8EPSS 20.1%Improper Authentication in Kubernetes in k8s.io/kubernetes
Published: 2/15/2022Modified: 4/28/2026
Also known as:DEBIAN-CVE-2020-8558
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.
Affected packages (3)
- Debian/kubernetesfrom 0, < 1.18.5-1
- Go/k8s.io/kubernetes>= 1.18.0, < 1.18.4
- Go/k8s.io/kubernetesfrom 0, < 1.16.11, >= 1.17.0, < 1.17.7, >= 1.18.0, < 1.18.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (13)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-8558
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-8558
- PATCHhttps://github.com/kubernetes/kubernetes
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1843358
- WEBhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8558
- WEBhttps://github.com/bottlerocket-os/bottlerocket/security/advisories/GHSA-wqv3-8cm6-h6wg
- WEBhttps://github.com/kubernetes/kubernetes/issues/92315
- WEBhttps://github.com/tabbysable/POC-2020-8558
- WEBhttps://groups.google.com/g/kubernetes-announce/c/sI4KmlH3S2I/m/TljjxOBvBQAJ
- WEBhttps://groups.google.com/g/kubernetes-security-announce/c/B1VegbBDMTE
- WEBhttps://labs.bishopfox.com/tech-blog/bad-pods-kubernetes-pod-privilege-escalation
- WEBhttps://security.netapp.com/advisory/ntap-20200821-0001
- WEBhttps://www.openwall.com/lists/oss-security/2020/07/08/1