Open Redirect in Kubernetes
CVE-2020-8559
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.061 (93.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.061 · newest: 0.061 · change: 0.000
Affected products
- Kubernetes — versions 1.6, 1.7, 1.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ (Exploit, Third Party Advisory)
- github.com/kubernetes/kubernetes/issues/92914 (Exploit, Patch, Third Party Advisory, Issue Tracking)
- security.netapp.com/advisory/ntap-20200810-0004/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-8559?
- CVE-2020-8559 is a medium-severity vulnerability in Kubernetes, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.4/10. Published 2020-07-22.
- How severe is CVE-2020-8559?
- Medium severity. CVSS v3 base score is 6.4 out of 10.
- Is CVE-2020-8559 known to be exploited?
- 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.