CVE-2020-8559Medium· 6.8▾ TwilightPoC availablePrivilege Escalation in Kubernetes
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 37.4 · likelihood 1.2 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
6.1%
2 GitHub repos (last check)
The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.7 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.
k8s.io/apimachinery < 0.16.13k8s.io/apimachinery >= 0.17.0, < 0.17.9k8s.io/apimachinery >= 0.18.0, < 0.18.7k8s.io/kubernetes < 1.16.13k8s.io/kubernetes >= 1.17.0, < 1.17.9k8s.io/kubernetes >= 1.18.0, < 1.18.7Upgrade to a patched release:
k8s.io/apimachinery 0.16.13k8s.io/apimachinery 0.17.9k8s.io/apimachinery 0.18.7k8s.io/kubernetes 1.16.13k8s.io/kubernetes 1.17.9k8s.io/kubernetes 1.18.7Connected by shared product, vendor, weakness, or advisory.