---
cve: "CVE-2020-8559"
severity: "MEDIUM"
cvss: 6.4
epss: "6.1%"
vendor: "Kubernetes"
kev: false
exploited: false
published: "2020-07-22 13:47:08"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T10:56:06+02:00"
---

# CVE-2020-8559

> 6.4 MEDIUM · 🧪 PoC

## Beschreibung

The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 3c88459e7af1fdf57330d5fecc6b86463c7a9a6c (Commit)
- 9f5e297ceb293eee23d4d86db30e97358b96f6d4 (Commit)

## Referenzen

- <https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ>
- <https://github.com/kubernetes/kubernetes/issues/92914>
- <https://security.netapp.com/advisory/ntap-20200810-0004/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2020-8559) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_