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URL Redirection to Untrusted Site ('Open Redirect')

CVE-2020-8559

Medium
6.8/10

Summary

The Kubernetes kube-apiserver is 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. This issue affects the package github.com/kubernetes/apimachinery prior to 0.16.13, 0.17.x prior to 0.17.9, and 0.18.x prior to 0.18.6, 0.19.x prior to 0.19.0-rc.1 and 0.20.0-alpha.0 and the package github.com/kubernetes/kubernetes prior to 1.16.13, 1.17.x prior to 1.17.9, and 1.18.x prior to 1.18.6, 1.19.x prior to 1.19.0-rc.1 and 1.20.0-alpha.0

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • REQUIRED
  • HIGH
  • HIGH
  • HIGH

CWE-601 - Open Redirect

An open redirect attack employs a URL parameter, HTML refresh tags, or a DOM based location change to exploit the trust of a vulnerable domain to direct the users to a malicious website. The attack could lead to higher severity vulnerabilities such as unauthorized access control, account takeover, XSS, and more.

References

Advisory Timeline

  • Published