CVE-2020-8559
Privilege Escalation in Kubernetes in k8s.io/apimachinery
6.8
MEDIUM
CVSS 3.1
EPSS 51.2%
Description
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 fix CVE-2020-8559
To remediate CVE-2020-8559, upgrade the affected package to a fixed version below.
- —upgrade to 1.18.5-1 or later
- —upgrade to 0.16.13 or later
- —upgrade to 0.16.13 or later
- —upgrade to 1.16.13 or later
- —upgrade to 1.16.13 or later
Is CVE-2020-8559 being exploited?
Likely — EPSS is 51.2%, placing CVE-2020-8559 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (5)
- from 0, < 1.18.5-1
- from 0, < 0.16.13
- from 0, < 0.16.13, >= 0.17.0, < 0.17.9, >= 0.18.0, < 0.18.7-rc.0
- from 0, < 1.16.13
- from 0, < 1.16.13, >= 1.17.0, < 1.17.9, >= 1.18.0, < 1.18.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H |