CVE-2020-8559
Privilege escalation from compromised node to cluster
MEDIUM 6.8EPSS 6.1%
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.
- Affected
- Kubernetes
- CVSS v3.1 NVD
- 6.8 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - CVSS v3.1 LIGGITT
- 6.4 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 6.0 MEDIUM
AV:N/AC:M/Au:S/C:P/I:P/A:P - EPSS
- 6.10% chance of exploitation in the next 30 days, 93rd percentile
- Published
- 2020-07-22
- Updated
- 2024-09-16
Proof-of-concept exploits (3)
- kubernetes/kubernetes/issues/92914128231★ · 2026-10-15
- tabbysable/POC-2020-855920★ · 2020-07-22
- tdwyer/CVE-2020-855953★ · 2020-07-23
Security advisories
- https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ
- https://security.netapp.com/advisory/ntap-20200810-0004
- advisories/GHSA-33c5-9fx5-fvjm