Permissions, Privileges, and Access Controls in Kubernetes - CVE-2020-8559
Published: July 22, 2020 / Updated: September 4, 2020
Vulnerability identifier: #VU34130
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/U:Green
CVE-ID: CVE-2020-8559
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Kubernetes
Affected software:
Kubernetes
Kubernetes
Detailed vulnerability description
The vulnerability allows a remote privileged user to execute arbitrary code.
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.
How to mitigate CVE-2020-8559
Install update from vendor's website.