CVEvulnerability

CVE-2020-8561

4.1 MEDIUM Published 2021-09-20 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-20
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
CVSS 3.1 ([email protected])
4.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
CVSS 2.0 ([email protected])
4.0 MEDIUM — AV:N/AC:L/Au:S/C:P/I:N/A:N
Weaknesses
CWE-441, CWE-610

Description

A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs.

Affected configurations

• kubernetes kubernetes 1.20.11 • kubernetes kubernetes 1.21.5 • kubernetes kubernetes 1.22.2

Related

Weakness · CWE (2)

  • CWE-441 Unintended Proxy or Intermediary weakness
  • CWE-610 Externally Controlled Reference to a Resource in Another Sphere weakness

References