Home/CVE/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
CVE

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

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.

MEDIUM · CVSS 6.4 EPSS 0.51201
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
CWE-601URL Redirection to Untrusted Site ('Open Redirect')
▤

Affected Products & Versions

4
kubernetes>= 1.6.0 and <= 1.15.0
kubernetes>= 1.16.0 and < 1.16.13
kubernetes>= 1.17.0 and < 1.17.9
kubernetes>= 1.18.0 and < 1.18.6
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go k8s.io/apimachinery MODERATE fixed in 0.16.13
Go k8s.io/kubernetes MODERATE fixed in 1.16.13
⚠

Public Exploits & PoCs

2
pocgithub.com · 92914github.com
pocgroups.google.com · 19nHQ5wkBwAJgroups.google.com
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumKubernetes Events Deleted
productmediumKubernetes Admission Controller Modification
productmediumKubernetes CronJob/Job Modification
productmediumKubernetes Potential Enumeration Activity
productmediumKubernetes Secrets Modified or Deleted
productmediumKubernetes Rolebinding Modification
▣

Scoring & Timeline

6.4
MEDIUM · CVSS v3.1 · jordan@liggitt.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Jul 2020 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

6
rhsaRHSA-2021:0281Important
rhsaRHBA-2020:4197Moderate
rhsaRHSA-2020:4298Low
rhsaRHSA-2020:5363Moderate
rhsaRHSA-2021:0030Moderate
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.netapp.com/advisory/ntap-20200810-0004/Third Party Advisory
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